JP6742935B2 - Cement composition quality control system and cement composition quality control method - Google Patents

Description

The present invention relates to a cement composition quality control system and a cement composition quality control method.

The cement composition has major quality characteristics such as strength characteristics and heat of hydration heat generation. )”, etc., it is necessary to perform the test on a specimen that has passed a predetermined age such as 3 days, 7 days, or 28 days. Therefore, in manufacturing and shipping the cement composition, it is not possible to establish a system for shipping after confirming all such quality characteristics.

Therefore, in the production site of the cement composition, the chemical composition of the cement composition, the mineral composition, or the fineness, etc., the measured value (cement character) of the cement composition to be measured, and the mortar or the cement composition using the cement composition. Confirm the relationship with physical properties (cement properties) such as strength development of cement composition hydration hardening products such as concrete at a specified age, set empirical quality control standards for cement characters, and cement characters Has developed a method for predicting cement properties, which is used as a method for determining the quality of cement compositions.

In this way, when manufacturing and shipping a cement composition by substituting the quality control of the cement property with the quality control of the cement character, the cement character is used because of the uncertain management method of alternative index management. The quality control standards set in are set excessively on the safe side.

While operating such a strict quality control system, for example, when the manufacturing equipment is started up or the cement composition type is changed, a non-conforming product that does not satisfy the quality control standard is generated. In addition, even when the production operation of the cement composition is stable, the operation status of the production equipment is usually continuously monitored, and the quality of the produced product is confirmed at a predetermined frequency, and some abnormality is discovered. In this case, a manufacturing/shipping system is constructed in which non-conforming products are never shipped.

If a strict quality control system is operated, there is a problem that the inventory of non-conforming products will increase at a predetermined rate. Therefore, for shipment lots that pass through service stations that have large cement silos, a cement composition that does not deviate from the prescribed quality standards while mixing shipment-conforming products with non-conforming products at an appropriate ratio based on experience. Processing (adaptation) is performed. Since the cement composition is a bulk product, it is possible to equalize the quality by thoroughly mixing the whole. However, such a homogenization operation at the time of shipment of a cement composition from a manufacturing factory has uncertainty in quality control.

Therefore, an object of the present invention is to allow a non-shipping product generated in a manufacturing process of a cement composition to be appropriately processed in a manufacturing plant, and a quality control system for the cement composition and a quality control method for the cement composition. Is to provide.

As a result of intensive studies on the above problems, the present inventors have completed the present invention having the following configuration.

That is, the present invention is a quality control system for a cement composition,
A measuring instrument for measuring the conveyed amount of the product immediately after production of the cement composition carried out from the finishing crushing process or the mixing process,
A storage facility dedicated to shipment-compatible products in which a shipment-compatible cement composition is transported,
A storage facility dedicated to non-shipping products, in which non-shipping cement compositions are transported,
A carry-out device for carrying out the shipping non-conforming product from the storage non-conforming product dedicated storage facility,
A mixer that is arranged in the transport path after the measuring device, and mixes the shipping non-conforming product carried out from the storage non-conforming product dedicated storage facility with the product immediately after production to obtain a cement composition mixture,
A sampling device for sampling the cement composition mixture from a transportation path,
A test device system for performing a quality confirmation test relating to the cement character of the cement composition mixture sampled by the sampling device,
A switching device that is arranged in a transport path after the sampling device and that switches the transport destination of the cement composition mixture to the dedicated storage facility for shipment-compatible products or the dedicated storage facility for shipment-incompatible products,
A signal of a test result transmitted from the test device system is received, and based on the test result, one of the storage facility dedicated to shipment and the storage facility dedicated to non-shipping product is used as the cement composition mixture. A dedicated storage facility for storing, transmitting the resulting signal to the switching device, and a control device for adjusting the switching of the transport destination via the switching device receiving the signal,
A quality control system for a cement composition comprising:

In the quality control system of the cement composition of the present invention, the control device receives the signal of the test result transmitted from the test device system and the signal of the measurement result transmitted from the measuring instrument, and Based on the result, the quality of the cement composition mixture determines the delivery amount of the shipping nonconforming product for maintaining the quality of the shipment-compatible cement composition, and sends a signal of the result to the delivery device, It is also preferable to have a configuration for adjusting the carry-out amount of the non-conforming product from the storage facility dedicated to the non-conforming product via the carry-out device which has received the signal.

Further, the quality control system includes a second sampling device for sampling the just-manufactured product from the transport path before the immediately-manufactured product reaches the mixer, and the shipping-nonconforming product as the shipping-nonconforming product. A third sampling device for sampling from the transport path before reaching the mixer,
The test apparatus system performs a quality confirmation test on the cement character of the as-manufactured product sampled by the second sampling device and a quality of the cement character of the non-conforming product sampled by the third sampling device. It has a configuration that further performs a confirmation test,
The control device sends a signal of the test result of the as-manufactured product sampled by the second sampling device, which is transmitted from the test device system, and the shipment non-conforming product sampled by the third sampling device. A signal of a test result is received, and based on those results, the quality of the cement composition mixture determines a shipment amount of the shipment nonconforming product for maintaining the quality of the shipment compatible cement composition, and the result It is also preferable to transmit the signal of No. 1 to the carry-out device and adjust the carry-out amount of the non-conforming product from the storage facility dedicated to non-conforming product via the carry-out device having received the signal.

Further, the test apparatus system, means for pulverizing the cement composition mixture sampled by the sampling device, means for making the pulverized cement composition mixture a press sample, and the pulverized cement Means for making the composition mixture into glass beads, X-ray diffractometer, X-ray fluorescence analyzer, means for conveying the pressed sample to the X-ray diffractometer, and the pressed sample to the fluorescent X-ray analyzer Means for carrying, means for carrying the glass beads to the X-ray fluorescence analyzer, a brane measuring device, means for carrying the cement composition mixture sampled by the sampling device to the brane measuring device, An X-ray diffractometer, the fluorescent X-ray analyzer, and/or means for storing the measurement value and/or the analysis result by the brane measuring device; and means for transmitting the measurement value and/or the analysis result to the control device. , Are preferably provided.

Further, it is preferable that the measured value by the X-ray diffractometer is obtained by the Rietveld analysis method in which the PONKCS method is combined.

Further, it is preferable that the dedicated storage facility for non-shipping products does not include a transport facility for the cement composition to the shipping facility.

On the other hand, another aspect of the present invention is characterized in that the above-mentioned quality control system for a cement composition is used to prevent the shipment of a cement composition that is incompatible with shipping from a cement composition manufacturing plant. It provides a method for quality control of goods.

According to the quality control system for a cement composition of the present invention, even if a shipping nonconforming product occurs in the manufacturing process of the cement composition, such a shipping nonconforming product can be kept in the manufacturing factory and not shipped, and the factory Non-conforming products that accumulate in the factory are mixed with the conforming products in the manufacturing process under strict quality control to be compatible, and the non-conforming products generated in the cement composition manufacturing process are properly processed in the manufacturing plant. It becomes possible to do. Therefore, the quality control system can be used to prevent shipment-incompatible cement compositions from being shipped from the cement composition manufacturing plant.

1 shows an embodiment of a quality control system according to the present invention, and is an overall configuration diagram thereof. It is a block diagram which shows one Embodiment of the test equipment system 9 with which the quality control system which concerns on this invention is equipped. It is a block diagram which shows one mode of control by the control apparatus 12 with which the quality control system which concerns on this invention is equipped. It is a block diagram which shows the other embodiment of the control by the control apparatus 12 with which the quality control system which concerns on this invention is equipped. It shows another embodiment of the quality control system according to the present invention, and is an overall configuration diagram thereof. It is a block diagram which shows other embodiment of control by the control apparatus 12 with which the quality control system which concerns on this invention is equipped.

Hereinafter, the present invention will be described in detail with reference to FIGS.

FIG. 1 shows an embodiment of a quality control system according to the present invention. In FIG. 1, solid arrows indicate the flow of cement composition, and single-dotted chain arrows indicate the flow of signals for control and the like. As the information transmission means such as signal transmission that the present invention should have as required, a normal information communication cable or the like can be used, or a wireless means may be used.

As shown in FIG. 1, a quality control system 1 for a cement composition according to the present invention (hereinafter referred to as “quality control system 1”) is carried out from a manufacturing process 2 which is a finishing crushing process or a mixing process of a cement composition. A scale 3 for measuring the amount of the cement composition immediately after production P ₁ that has been manufactured, a storage facility 6 for shipment-compatible products to which the shipment-compatible product P ₃ that is a shipment-compatible cement composition is transported, and a shipment non-compliance Non-shipping product dedicated storage facility 7 to which the shipping non-compliant product P ₄ which is a different cement composition is conveyed, a carry-out device 11 for carrying out the shipping non-compliant product P ₄ from the shipping non-compliant product dedicated storage facility 7, and the weighing machine 3 A mixer ₄ which is arranged on the subsequent transportation route and which mixes the shipment-incompatible product P ₄ carried out from the shipment-incompatible product dedicated storage facility 7 with the immediately-manufactured product P ₁ to obtain a cement composition mixture P ₂ . A sampling device 8 for sampling the cement composition mixture P ₂ from a transport path; a test device system 9 for performing a quality confirmation test on the cement character of the cement composition mixture P ₂ sampled by the sampling device 8; A switching device 5 which is arranged on a transportation path after the sampling device 8 and switches the transportation destination of the cement composition mixture P ₂ between the shipping-adapted dedicated storage facility 6 and the shipping-non-adapted dedicated storage facility 7, and the test. The signal of the test result transmitted from the device system 9 is received, and based on the test result, one of the storage facility 6 dedicated to shipment-adapted product and the storage facility 7 dedicated to non-shipment-adapted product is supplied to the cement composition. A control device 12 that determines the storage device as a dedicated storage facility for storing the mixture P ₂ , transmits a signal resulting from the determination to the switching device 5, and adjusts the switching of the transport destination via the switching device 5 that has received the signal. With.

The manufacturing process 2 is a finishing crushing process using a finishing crushing mill, a mixing process using a mixing facility, or the like in the production of Portland cement or mixed cement, and means a normal finishing crushing process or a mixing process in a cement manufacturing factory. ..

The meter 3 measures the amount of the cement composition immediately after being manufactured P ₁ that has been unloaded from the manufacturing process 2 and that has passed through the meter 3, and that has been conveyed. As the measuring device 3, a device such as a belt conveyor scale capable of measuring the weight of powder during transportation, a powder quantitative feeder such as a measuring feeder, or the like can be used. Further, in this embodiment, the signal of the measurement result of the weighing instrument 3 is transmitted to the control device 12 sequentially or continuously.

The mixer 4 is arranged in the middle of the transport path of the as-manufactured product P ₁ of the cement composition carried out from the manufacturing process 2, and at a position subsequent to the position where the measuring device 3 measures.

In this mixer 4, the immediately-manufactured product P ₁ of the cement composition that has been carried out from the manufacturing process 2 and passed through the measuring device 3 is mixed with the shipping non-conforming product P ₄ carried out from the storage non-shipping dedicated storage facility 7. .. By this mixing, the shipment non-conforming product P ₄ can be properly processed into the cement composition mixture P ₂ which may be newly shipped. That is, it can be adapted. At this time, the mixing ratio (mass ratio) P ₁ :P ₄ of the as-produced product P ₁ of the cement composition and the incompatible product P ₄ may vary depending on the respective grades of P ₁ and P _4, but typically, , For example, 99:1 to 90:10, and more typically, 97:3 to 94:6, for example. The mixing ratio (mass ratio) P ₁ :P ₄ is the result of the quality confirmation test of the cement composition mixture P ₂ performed by the test apparatus system 9 described later and the result of the as-manufactured product P ₁ performed by the weighing machine 3. It may be determined based on the measurement result of the transport amount.
As the initial value at the start of operation, the mixing ratio in the latest operation may be used.

The shipping nonconforming product P ₄ mixed with the immediately after-production product P ₁ of the cement composition in the mixer ₄ is supplied from the storage nonconforming product dedicated storage facility 7. An unpacking device 11 is attached to the non-shipping non-conforming product dedicated storage facility 7, and a storage non-conforming product dedicated storage device 7 for non-shipping non-conforming product P ₄ is provided by increasing and decreasing the driving force of the unpacking device 11 and adjusting valve mechanism provided in the uncarrying device 11. I try to adjust the carry-out amount from. Therefore, by adjusting the carry-out amount of the shipping nonconforming product P ₄ carried out from the shipping nonconforming product dedicated storage facility 7 with respect to the transport amount of the as-manufactured product P ₁ measured by the weighing machine 3, the production of the cement composition The mixing ratio (mass ratio) of the immediate product P ₁ and the non-shipping product P ₄ can be adjusted. Further, in this embodiment, the carry-out device 11 is adapted to receive the control signal from the control device 12 sequentially or continuously, and to adjust the carry-out amount of the shipping nonconforming product P ₄ based on the control signal. So that you can perform the operations.

The mixer 4 is not particularly limited as long as it is a device capable of continuously mixing powders such as a pug mixer. Furthermore, without using a special mixing device, in the conveying process of the cement composition mixture P _2, for example, by mixing action caused by the laid-joints and cement cooler like a belt conveyor, sufficient cement composition mixture P ₂ If it is mixed and balanced, it can be said that it constitutes a mixer that performs such a function. The mixer 4 is meant to include such a mixing mechanism.

In the sampling device 8, a part of the cement composition mixture P ₂ formed by the mixer 4 is sampled along the transportation route. A general-purpose powder sampling device such as a spoon sampler or a screw sampler may be used as the sampling device 8.

The sampling amount of the cement composition mixture P ₂ in the sampling device 8 may be the required amount or more to be subjected to the quality confirmation test performed by the test device system 9 described later. Typically, for example, one sampling may be 200 g to 5000 g. Moreover, the sampling frequency in the sampling device 8 is limited by the time required for the quality confirmation test of the cement composition mixture P ₂ described later, but typically, for example, 1 time/hour to 4 times/hour. is there.

The cement composition mixture P ₂ sampled by the sampling device 8 is conveyed to the test device system 9 by a conveying device whose description is omitted in FIG. 1.

FIG. 2 shows an embodiment of the test apparatus system 9. In FIG. 2, solid line arrows show the flow of the cement composition, and chain line arrows show the flow of signals for control and the like.

As shown in FIG. 2, in the test apparatus system 9, the cement composition mixture P ₂ sampled by the sampling apparatus 8 is subjected to a quality confirmation test regarding the cement character. The test apparatus system 9 shown in this embodiment includes means 9a for pulverizing the cement composition mixture P ₂ sampled by the sampling apparatus 8 and means 9b for making the pulverized cement composition mixture P ₂ into a pressed sample. , A means 9c for making the finely pulverized cement composition mixture P ₂ into a glass bead, an X-ray diffractometer (XRD) 9d, a fluorescent X-ray analyzer (XRF) 9e, and a pressed sample by an X-ray diffractometer (XRD). ) 9d, a means 9f for conveying the pressed sample to the fluorescent X-ray analyzer (XRF) 9e, a means 9h for conveying the glass beads to the fluorescent X-ray analyzer (XRF) 9e, and a brane measuring device. 9i, means 9j for conveying the cement composition mixture P ₂ sampled by the sampling device 8 to the brane measuring device 9i, and measurement by the X-ray diffractometer, the fluorescent X-ray analyzer, and/or the brane measuring device. It comprises means 9k for storing values and/or analysis results, and means 9l for transmitting such measured values or analysis results to the control device 12. However, the configuration of the test apparatus system 9 used in the present invention is not limited to the configuration shown in this embodiment, and relates to at least the chemical composition, mineral composition, and Blaine specific surface area of the cement composition mixture P ₂ , for example. It suffices to have means for performing a quality confirmation test to obtain at least one of these cement characters, and means for transmitting a signal of the test result or analysis result to the control device 12.

In the test apparatus system 9, the above-mentioned means for finely pulverizing the cement composition mixture P ₂ sampled by the sampling apparatus 8, means for making the finely pulverized cement composition mixture P ₂ into a pressed sample, and finely pulverized The means for making the cement composition mixture P ₂ into glass beads is a means for pretreating a measurement sample required for appropriate measurement in an X-ray diffractometer or a fluorescent X-ray analyzer.

The X-ray diffractometer of the test apparatus system 9 shown in this embodiment may be any ordinary apparatus that measures the content (mineral composition) of the constituent phases of the cement composition by the X-ray diffraction method. Concretely, cement clinker minerals (alite (C ₃ S), belite (C ₂ S), C ₃ A, C ₄ AF), gypsum (dihydrate gypsum, hemihydrate gypsum, anhydrous gypsum), small amount mixed Any device that can quantify the content of components or mixed materials (blast furnace slag fine powder, fly ash, limestone fine powder, siliceous mixed material) and other constituent phases (free lime (calcium oxide), etc.) may be used. ..

Although there are many methods for analyzing the content of the constituent phase from the measurement result of X-ray diffraction, it is preferable to use the Rietveld analysis method from the viewpoint of the ease of analysis and the accuracy of quantification. Furthermore, in order to ensure the accuracy of quantitative determination of the amorphous phase of the blast furnace slag fine powder, fly ash, siliceous admixture, etc., which are a small amount of mixed components or admixtures, the PONKCS (described in Document 1 or Document 2 below) is used. The Rietveld analysis method is preferably combined with an analysis method such as the Partial or No Known Crystal Structure method that enables quantitative analysis of the amorphous phase without using an internal standard substance.
・Reference 1: NVY Scarlett et al.; Quantification of phases with partial or no known crystal structures, Powder Diffraction, Vol.21, No.4, pp.278-284 (2006)
・Reference 2: BRUKER website: QPA with Partial or No Known Crystal Structures (PONKCS), BRUKER Advanced XRD Workshop (2011)

The fluorescent X-ray analyzer of the test apparatus system 9 shown in this embodiment may be any ordinary apparatus that measures the chemical composition of the cement composition by the method of fluorescent X-ray analysis. From the viewpoint of ensuring quantitative accuracy, it is preferable to use glass beads as a measurement sample, but use a press sample to measure volatile components that are volatilized and dissipated in the vitrification step of the measurement sample performed by heating and melting. Is preferred. Therefore, it is more preferable to perform two fluorescent X-ray analyzes with different pretreatment methods on one cement composition mixture P ₂ .

As the brane measuring device of the test device system 9 shown in this embodiment, a usual device for measuring the brane specific surface area of the cement composition mixture may be used, and preferably JIS R 5201 “Physical test method for cement”. This is a similar air-permeable measurement device. The sample to be measured by the brane measuring device is a finely pulverizing means or a pressed sample, which is required for the appropriate measurement in the X-ray diffractometer or the fluorescent X-ray analyzer as described above. No pretreatment such as means or means for making glass beads is required.

The time required for the quality confirmation test per sample of the cement composition mixture P _{2 to} be tested in the test apparatus system 9 is from the viewpoint of feeding back the test result promptly and suppressing the generation amount of non-conforming products, It is preferably about 15 minutes to 1 hour. In order to complete all the above-mentioned measurements within this measurement time, the test apparatus system 9 uses a fully automatic measurement system in which the apparatus also performs all of the pretreatment means and the transfer of the sample between the apparatuses. Is preferred.

The switching device 5 is arranged in the middle of the transportation path of the cement composition mixture P ₂ formed by the mixer 4 and at a position subsequent to the position where sampling is performed by the sampling device 8. Then, by using this switching device 5, the subsequent destination of the cement composition mixture P ₂ is the dedicated storage facility 6 for shipment compatible product for storing the shipment compatible product P ₃ which is the shipment compatible cement composition, or the shipment nonconformance. It is possible to switch whether or not it is the dedicated storage non-conforming product storage facility 7 for storing the non-conforming product P ₄ which is a different cement composition. Further, the switching device 5 is adapted to receive the control signal from the control device 12 sequentially or continuously, and to execute the switching operation based on the control signal. As the switching device 5, a switching valve for pneumatic transportation, a device such as a line changer for a belt conveyor, or a mechanism for switching the rotation direction of the belt conveyor may be used.

FIG. 3 is a block diagram illustrating one embodiment of control by the control device 12.

In the embodiment shown in FIG. 3, the control device 12 receives the signals of the test result and the analysis result transmitted from the test device system 9 by the receiving means 12a provided in the control device 12, and sets each preset quality evaluation. The shipment suitability of the cement composition mixture P ₂ is judged by comparing with the standard value in the item. Then, the result is transmitted from the transmission means 12b provided in the control device 12 to the switching device 5. Specifically, if the cement composition mixture P ₂ is determined to ship adapted for switching device 5 and transmits signals to carry cement composition mixture P ₂ to factory Compliant only storage facilities 6 .. On the other hand, if the cement composition mixture P ₂ is determined to shipment incompatible for switching device 5 and transmits signals to carry cement composition mixture P ₂ to factory nonconforming products only storage facility 7.

FIG. 4 is a configuration diagram illustrating another embodiment of the control by the control device 12.

In the embodiment shown in FIG. 4, in addition to the control described in FIG. 3 above, the control device 12 causes the test result signal and the analysis result signal transmitted from the test device system 9 and the measurement result transmitted from the measuring instrument 3. Signal of the cement composition mixture P ₂ is received by the receiving means 12 c provided in the control device 12, and each quality evaluation item of the cement composition mixture P ₂ is conveyed to the mixer 4 so as to reach a preset management target value. to determine the discharge amount from the shipping nonconforming products dedicated storage facility 7 of shipping nonconforming products P ₄ that. Specifically, based on the deviation of each quality evaluation test value of the cement composition mixture P ₂ from the target value, the mixing ratio of the as-manufactured product P ₁ of the cement composition and the shipping nonconforming product P ₄ is changed, In order to secure the mixed ratio after such change, the carry-out amount of the non-shipped product P ₄ from the dedicated storage facility 7 of the non-shipped product is determined based on the measurement result of the transport amount of the just-manufactured product P ₁ by the measuring device 3. To do. Then, the result is transmitted to the carry-out device 11 from the transmitting means 12d provided in the control device 12. Specifically, a signal is transmitted to the carry-out device 11 so as to carry out the shipment-nonconforming product P ₄ from the storage-nonconforming product dedicated storage facility 7 with the determined carry-out amount.

The control of the embodiment shown in FIG. 4 is mainly performed as appropriate when the cement composition mixture P ₂ is judged to have the quality of the cement composition suitable for shipment in the quality confirmation test in the test apparatus system 9. It is preferable. That is, when the cement composition mixture P ₂ does not have the quality of the shipment-compatible cement composition, the delivery amount of the shipment-nonconforming product P ₄ from the storage-nonconforming product-dedicated storage facility 7 is simply set within the set range. It is preferable that the lower limit value is set, and even if the delivery amount of the non-shipping product P ₄ from the exclusive storage facility 7 for non-shipping product is the lowest value within the setting range, the cement composition mixture P ₂ can provide the quality of the cement composition that is suitable for shipping. If not provided, it is preferable to set the carry-out amount of the non-conforming product P ₄ from the exclusive storage facility 7 for non-conforming product to zero. On the other hand, in the quality confirmation test in the test apparatus system 9, when it is determined that the cement composition mixture P ₂ has the quality of the shipment-compatible cement composition, as much as possible within the range where the quality standard can be satisfied. This is because it is desirable to adapt and process the non-shipping product P ₄ of.

It should be noted that the dedicated storage facility 6 for shipping-compatible products is provided with a transportation facility, which is not shown in FIG. 1, so that the transportation facility can ship the stored products to the shipping facility. Since the storage facility 7 for exclusive use with non-shipping products is not provided with a transportation facility to the shipping facility, it is not possible to directly ship the stored products.

On the other hand, FIG. 5 shows another embodiment of the quality control system according to the present invention. In FIG. 5, as in FIG. 1, solid arrows indicate the flow of the cement composition, and single-dot chain arrows indicate the flow of signals for control and the like. Further, the same reference numerals are given to the configurations common to the embodiment shown in FIG. 1 and the embodiment shown in FIG. In the following description, the description of the embodiment shown in FIG. 5 will be omitted for the structures, functions, etc. that are substantially common to the embodiment shown in FIG.

In the embodiment shown in FIG. 5, a cement composition quality control system 10 (hereinafter referred to as “quality control system 10”) has a manufacturing process 2 in addition to the configuration provided in the quality control system 1 (FIG. 1) described above. A second sampling device 13 for sampling the just-manufactured product P ₁ from the carrier path is provided in the middle of the carrier route of the as-manufactured product P ₁ of the cement composition carried out from the container to the mixer 4. Then, the as-manufactured product P ₁ sampled by the sampling device 13 is transported to the test device system 9 by a transport device whose description is omitted in FIG. Further, in addition to the configuration provided in the quality control system 1 (FIG. 1) described above, a transport path for the shipping incompatible product P ₄ delivered from the shipping incompatible product dedicated storage facility 7 via the unloading device 11 to the mixer 4. In the middle of, a third sampling device 14 for sampling the shipping incompatible product P ₄ from the transport path is arranged. Then, the shipping nonconforming product P ₄ sampled by the sampling device 14 is carried to the test device system 9 by a carrying device whose description is omitted in FIG. 5. The sampling method, mode, and the like by these sampling devices 13 and 14 are the same as those of the sampling device 8 included in the quality control system 1 (FIG. 1) described above.

Then, in the test device system 9, the sampled as-manufactured product P ₁ and the non-shipped product P ₄ are sampled in the same manner as the method, the mode, etc. described for the test device system 9 included in the quality control system 1 (FIG. 1) described above. For each, at least, for example, a quality confirmation test relating to the chemical composition, mineral composition, Blaine specific surface area, etc. of the cement composition mixture P ₂ is performed, and at least one of these cement characters is obtained, and the test results and analysis results are obtained. Is transmitted to the control device 12.

FIG. 6 is a configuration diagram illustrating an implementation mode of control by the control device 12 in the embodiment shown in FIG.

In the embodiment shown in FIG. 6, in addition to the control described with reference to FIG. 3 for the control device 12 included in the quality control system 1 (FIG. 1) described above, the control device 12 transmits the test device system 9 immediately after manufacturing. The signal of the test result and the analysis result of the product P ₁ and the product P ₄ which is not shipped and the signal of the measurement result transmitted from the measuring instrument 3 are received by the receiving means 12 e provided in the control device 12, and the cement composition is obtained. The delivery amount of the shipping nonconforming product P ₄ conveyed to the mixing machine _{4 from} the shipping nonconforming product dedicated storage facility 7 is determined so that each quality evaluation item of the mixture P ₂ has a preset management target value. .. Specifically, the quality of the virtual cementitious composition mixture when mixed immediately after product P ₁ and shipped nonconforming products P ₄ produced in any mixing ratio, the manufacturing after article P ₁ and shipped nonconforming products P ₄ The quality evaluation test value is regarded as the value obtained by weighted averaging with the mixing ratio, and the mixing ratio that maximizes the mixing amount of the shipping nonconforming product P ₄ within the range where the weighted average value satisfies the set quality target value, In order to ensure such a mixing ratio, the carry-out amount of the shipping nonconforming product P ₄ from the exclusive shipping nonconforming product storage facility 7 is determined based on the measurement result of the transport amount of the just-manufactured product P ₁ by the measuring device 3. Then, the result is transmitted from the transmitting means 12f provided in the control device 12 to the carry-out device 11. Specifically, a signal is transmitted to the carry-out device 11 so as to carry out the shipment-nonconforming product P ₄ from the storage-nonconforming product dedicated storage facility 7 with the determined carry-out amount.

The quality control system described above makes it possible to establish a more reliable quality assurance system for cement compositions than ever before. Further, in this quality control system, since the nonconforming products for shipping are constantly adapted, the stock of nonconforming products in the cement composition manufacturing plant is not increased, which contributes to stable operation of the manufacturing plant.

1, 10... Quality control system, 2... Manufacturing process, 3... Metering device, 4... Mixer, 5... Switching device, 6... Storage facility dedicated to shipment-compliant products, 7... Storage facility dedicated to non-shipping-compliant products, 8, 13, 14... Sampling device, 9... Testing device system, 9a to 9l... Each component of the testing device system 9, 11... Unloading device, 12... Control device, 12a, 12c, 12e... Receiving means, 12b, 12d, 12f... Sending means , P ₁ ... Immediately manufactured product of cement composition, P ₂ ... Cement composition mixture, P ₃ ... Shipment conforming product, P ₄ ... Shipment nonconforming product

Claims (7)

A quality control system for a cement composition,
A measuring instrument for measuring the conveyed amount of the product immediately after production of the cement composition carried out from the finishing crushing process or the mixing process,
A storage facility dedicated to shipment-compatible products in which a shipment-compatible cement composition is transported,
A storage facility dedicated to non-shipping products, in which non-shipping cement compositions are transported,
A carry-out device for carrying out the shipping non-conforming product from the storage non-conforming product dedicated storage facility,
A mixer that is arranged in the transport path after the measuring device, and mixes the shipping non-conforming product carried out from the storage non-conforming product dedicated storage facility with the product immediately after production to obtain a cement composition mixture,
A sampling device for sampling the cement composition mixture from a transportation path,
A test device system for performing a quality confirmation test relating to the cement character of the cement composition mixture sampled by the sampling device,
A switching device that is arranged in a transport path after the sampling device and that switches the transport destination of the cement composition mixture to the dedicated storage facility for shipment-compatible products or the dedicated storage facility for shipment-incompatible products,
A signal of a test result transmitted from the test device system is received, and based on the test result, one of the storage facility dedicated to shipment and the storage facility dedicated to non-shipping product is used as the cement composition mixture. A dedicated storage facility for storing, transmitting the resulting signal to the switching device, and a control device for adjusting the switching of the transport destination via the switching device receiving the signal,
A quality control system for a cement composition comprising: The control device receives the signal of the test result transmitted from the test device system and the signal of the measurement result transmitted from the measuring instrument, and based on these results, the quality of the cement composition mixture is Determining the carry-out amount of the shipment non-conforming product for maintaining the quality of the shipment-compatible cement composition, transmitting a signal of the result to the carry-out device, and performing the shipment via the carry-out device that has received the signal. The quality control system for a cement composition according to claim 1, further comprising a configuration for adjusting the carry-out amount of the non-conforming product from the non-conforming product dedicated storage facility. The quality control system includes a second sampling device that samples the just-manufactured product from the transport route before the just-manufactured product reaches the mixer, and mixes the shipping-nonconforming product with the shipping-nonconforming product. A third sampling device for sampling from the transport path before reaching the machine,
The test apparatus system is a quality confirmation test for the cement character of the as-manufactured product sampled by the second sampling apparatus, and a quality of the cement character for the non-conforming product sampled by the third sampling apparatus. It has a configuration that further performs a confirmation test,
The control device sends a signal of the test result of the as-manufactured product sampled by the second sampling device, which is transmitted from the test device system, and the shipment non-conforming product sampled by the third sampling device. A signal of a test result is received, and based on those results, the quality of the cement composition mixture determines a shipment amount of the shipment nonconforming product for maintaining the quality of the shipment compatible cement composition, and the result 2. The method also according to claim 1, further comprising a configuration for transmitting the signal of No. 1 to the carry-out device and adjusting the carry-out amount of the non-shipping product from the storage facility dedicated to non-shipping product via the carry-out device having received the signal. Quality control system for cement composition in Japan. The test apparatus system, means for pulverizing the cement composition mixture sampled by the sampling device, means for making the pulverized cement composition mixture a press sample, and the pulverized cement composition Means for forming a mixture into glass beads, X-ray diffractometer, X-ray fluorescence analyzer, means for transporting the pressed sample to the X-ray diffractometer, and transporting the pressed sample to the fluorescent X-ray analyzer. Means, means for transporting the glass beads to the X-ray fluorescence analyzer, a brane measuring device, means for transporting the cement composition mixture sampled by the sampling device to the brane measuring device, and the X-rays A diffractometer, the fluorescent X-ray analyzer, and/or means for storing the measurement value and/or the analysis result by the brane measuring device; and means for transmitting the measurement value and/or the analysis result to the control device. The quality control system for a cement composition according to any one of claims 1 to 3, which comprises: The quality control system for a cement composition according to claim 4 , wherein the measured value by the X-ray diffractometer is obtained by a Rietveld analysis method in which a PONKCS method is combined. The quality control system for a cement composition according to any one of claims 1 to 5, wherein the dedicated storage facility for non-shipping products does not include a facility for transporting the cement composition to the shipping facility. A cement composition quality control system according to any one of claims 1 to 6 is used to prevent shipment of non-shipping-compatible cement composition from a cement composition manufacturing plant. , Method for quality control of cement composition.