JP7328540B2 - Sintering raw material sampling device and sintering raw material sampling method using the same - Google Patents

Description

TECHNICAL FIELD The present invention relates to a sampling device for taking a sample of sintering raw material from a raw material layer of sintering raw material charged into a sintering palette of a sintering machine, and a sampling method of sintering raw material using the same.

Iron raw materials used in blast furnaces include lumps of mined iron ore and sintered ore obtained by sintering powdered ore. Sintered ore can be obtained by firing iron ore fines together with limestone, coke fines, or the like.

In producing this sintered ore, in general, various brands of fine ore, auxiliary raw materials such as limestone, and carbonaceous material such as coke fine as a solid fuel are mixed in a predetermined ratio, and water is added. In addition, it is granulated into pseudo particles, and the granulated sintering raw material is charged into a sintering pallet of a DL (Dwight Lloyd) type sintering machine that moves continuously in the horizontal direction. Next, the upper layer of the raw material layer composed of the sintering raw material charged into the firing pallet is ignited by a burner or the like, and the sintering raw material is sintered while being sucked from below the firing pallet and forcibly ventilated.

The progress of such a sintering reaction depends on the blending ratio of the sintering raw material itself and the air permeability of the raw material layer in the sintering pallet. In particular, the air permeability of the raw material layer is affected by the filling state of the sintering raw material in the firing pallet, the porosity of the raw material layer, the grain size of the sintering raw material, and the like. Therefore, it is important to accurately grasp the filling state of the sintering raw material on the firing pallet, such as the particle size distribution of the sintering raw material in the depth direction of the raw material layer and the degree of filling.

For example, in order to investigate the actual state of the raw material layer on the sintering pallet of the sintering machine, it is conceivable to take one pallet off-line and conduct a boring investigation. However, this would require a long period of equipment stoppage and a great cost.

Therefore, a sampling tube having an opening at its lower end, an elevating mechanism for moving the sampling tube up and down to insert and remove it from the raw material layer, a bottom cover for closing the opening at the lower end of the sampling tube, and the bottom cover are supported. A sampling device having an arm and a rotating mechanism for rotating a bottom cover is known (see Patent Document 1). According to this sampling device, the sampling tube is inserted into the raw material layer of the sintering raw material charged into the sintering machine, and the bottom cover is rotated together with the arm to close the opening of the sampling tube. By pulling up (removing) the sampling tube together with the bottom cover, the sintering raw material can be sampled while maintaining the actual filling state of the raw material layer.

By the way, in the field of geological surveys, boring surveys are conducted for the purpose of knowing the structure of the ground. A rotary penetrating pile called an auger is used for such boring surveys. This auger is, for example, a sampling rod, which is a vertically elongated round-bar-shaped member, and has spiral blades continuously engraved on the top and bottom (see Patent Document 2). When it stands up and rotates into the ground, it burrows into the ground along with the spiral blade. When the rotary penetration is stopped when the auger has penetrated to the required depth, and the auger is pulled out of the ground (extracted), the geology sandwiched between the spiral blades can be collected as a ground sample.

Patent No. 5697528 Patent No. 3621940

The main part of the sampling device according to Patent Document 1 is as shown in FIG. 11, but this sampling device has room for improvement in the following respects.

That is, when a sampling tube 11 having an opening 11a at its lower end is inserted into the raw material bed and an arm 13 having a bottom lid 14 at its tip is rotated to close the opening 11a of the sampling tube 11, , the sintered raw material between the sampling tube 11 and the arm 13 interferes, and the opening 11a is not completely closed by the bottom lid 14, creating a gap. is pressed by the arm 13 (soil pressure is generated), and the sampling tube 11 may be bent or otherwise deformed. Moreover, a large load is applied to the rotating shaft 15 that rotatably connects the arm 13 to the sampling tube 11 via the joint portion 12 . Therefore, it is necessary to increase the strength of the sampling tube 11 and the arm 13 by thickening them, or to increase the size of the sampling device itself. In particular, when the thickness of the raw material layer charged to the baking pallet increases, the collection tube 11 and the arm 13 must be lengthened, and such problems become more pronounced.

On the other hand, if an auger used in geological surveys is applied to sample the sintering raw material from the sintering pallet, the particle size of the sintering raw material in the collected sample will be different from the actual one. The first reason is that although the auger has blades attached for multiple cycles, sintering occurs when the auger is rotated and the blades touch the sintering raw material or when shear stress is applied. This is because the raw material particles (granules) are pulverized. Second, when the auger blades are rotated and come into contact with the sintering material, they push the sintering material out of the auger. In particular, this point is considered to be significant for sintering raw materials having a large particle size. Therefore, the particle size distribution of the sampled sintering raw material is considered to be different from the actual one, and it can be said that it is unsuitable for a sampling device for sintering raw material.

Therefore, the present inventors have made intensive studies to solve the problems of conventional sampling devices for sampling sintered raw materials. Then, in a state in which the rotary penetrating pile is inserted into the sampling tube, the rotary propulsion blade closes the opening of the sampling tube, thereby rotating the arm and closing the opening of the sampling tube with the bottom lid. The present invention has been completed because it is possible to sample the raw material for sintering while eliminating the need for such an operation.

Accordingly, an object of the present invention is to be able to sample a sintering raw material sample while maintaining the actual filling state from a raw material layer of the sintering raw material charged into a firing pallet of a sintering machine, and to It is an object of the present invention to provide a sintering raw material sampling device capable of reducing the mechanical load generated during sampling without increasing the size and strength of the device itself.

Another object of the present invention is to use the above-described sampling device to extract the sintering raw material from the raw material layer of the sintering raw material charged into the firing pallet of the sintering machine while maintaining the actual filling state. To provide a sampling method for sintering raw material, capable of sampling a sample and reducing the work load in sampling.

That is, the present invention is a sampling device for collecting a sample of sintering raw material from a raw material layer of sintering raw material charged into a sintering palette of a sintering machine,
a collection tube having an opening at its lower end and equipped with an elevating mechanism capable of being inserted into and removed from the raw material layer;
It has a pile body that is inserted into the sampling pipe, and a rotary propeller wing is fixed only near the tip of the pile body, and has an elevating mechanism that can be inserted into and removed from the raw material layer, and the rotary propeller wing. and a rotating penetrating pile equipped with a rotating mechanism capable of rotating
With the extraction pipe and the rotary penetration pile inserted into the raw material layer, the rotary propelling wings of the rotary penetration pile block the opening of the extraction pipe, and the extraction pipe and the rotary penetration pile are extracted from the raw material layer. By doing so, the sintering raw material sampling device is characterized by collecting a sample of the sintering raw material from the raw material layer.

Further, the present invention is a sintering raw material sampling method for collecting a sample of the sintering raw material from the raw material layer of the sintering raw material charged into the sintering palette of the sintering machine using the sampling device,
a step of lowering the collection tube by an elevating mechanism and inserting it into the raw material layer;
While the rotary penetration pile is rotated by the rotary mechanism, it is lowered by the elevating mechanism and inserted into the raw material layer. closing the opening of the tube with a rotary propulsion blade;
A step of removing these sampling pipes and rotary penetration piles from the raw material layer;
A sampling method for sintering raw materials, characterized by having

Furthermore, the present invention is a sintering raw material sampling method for collecting a sample of the sintering raw material from the raw material layer of the sintering raw material charged into the sintering palette of the sintering machine using the sampling device,
While the pile body of the rotary penetration pile is inserted into the extraction pipe, the rotary penetration pile is rotated by the rotation mechanism, and the extraction pipe and the rotary penetration pile are lowered by the elevating mechanism and inserted into the raw material layer. process and
A step of stopping the rotation of the rotating mechanism and blocking the opening of the sampling pipe with the rotating propulsion wings of the rotating penetrating pile;
A step of removing these sampling pipes and rotary penetration piles from the raw material layer;
A sampling method for sintering raw materials, characterized by having

In the sampling device of the present invention, the sampling pipe and the rotary penetrating pile may each have an elevating mechanism so that they can be inserted into and pulled out of the raw material layer, or the sampling pipe and the rotary penetrating pile may have a common elevating mechanism. A mechanism may be provided so that it can be inserted into and removed from the raw material layer.

In addition, the sampling device of the present invention may further include an auxiliary lid disposed on the opening side of the sampling pipe closed by the rotary propelling wings of the rotary penetration pile.

In addition, the rotary propelling blade of the rotary penetrating pile in the sampling device of the present invention may be a spiral rotary blade or a vane type rotary blade.

Further, the rotary propulsion blades of the rotary penetrating pile in the sampling device of the present invention are preferably attached at one pitch (one cycle) around the pile body.

According to the present invention, it is possible to sample the sintering raw material from the raw material layer charged to the firing pallet of the sintering machine while maintaining the actual filling state, so that the state of the sintering raw material on the sintering pallet can be accurately determined. can be grasped. Moreover, since the mechanical load generated during sampling is reduced, it can be applied even when the layer thickness of the raw material layer charged to the baking pallet is increased, and the weight of the apparatus can be reduced, reducing the work load. can also be reduced.

FIG. 1 is a schematic diagram for explaining a sampling device according to the present invention. FIG. 2 is an explanatory diagram showing an example of a rotary propulsion blade of a rotary penetrating pile. FIG. 3 is a schematic diagram for explaining an elevating mechanism provided by the sampling pipe and the rotating-penetrating pile, and a rotating mechanism provided by the rotating-penetrating pile. FIG. 4 is a schematic diagram for explaining the sampling method of the sintering raw material using the sampling device of the present invention, and shows the case where the sampling pipe and the rotary penetration pile are individually inserted into the raw material layer. FIG. 5 is another schematic diagram for explaining the sampling method of the sintering raw material using the sampling device of the present invention, and shows the case where the sampling pipe and the rotary penetrating pile are inserted into the raw material bed at the same time. FIG. 6 is a schematic diagram showing how the sampling device of the present invention further includes an auxiliary lid. FIG. 7 is a schematic diagram showing the state of the rotary propulsion blade portion (vane-type rotary blade) of the rotary penetration pile used in Tests 1 and 2. FIG. 8 is a schematic diagram showing the state of the rotary propulsion blade portion (spiral rotary blade) of the rotary penetration pile used in Tests 1 and 2. FIG. 9 is a graph comparing the weights of the sintering raw materials sampled in the present invention example and the comparative example (flat plate) in Test 1. FIG. FIG. 10 is a graph comparing the relative masses of raw material particles of sintering raw materials collected in the present invention example and comparative examples (flat plate and auger) in Test 2. FIG. FIG. 11 is a schematic diagram for explaining a conventional sampling device.

Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 shows the main part of the sampling device according to the present invention. That is, the sampling device according to the present invention has a sampling pipe 1 having an opening 1a at its lower end, a pile body 2 inserted through the sampling pipe 1, and a rotating propulsion device near the tip of the pile body 2. It is provided with a rotary penetrating pile 4 to which a wing 3 is fixed. Part 1a can be closed. Therefore, by removing the sampling pipe 1 and the rotary penetration pile 4 from the raw material layer in this state, a sample of the sintering raw material can be collected from the raw material layer.

Of these, the collection tube 1 preferably has a substantially cylindrical shape with an open lower end and an open upper end, and the interior thereof is hollow. A circular opening 1a is provided at the lower end (tube bottom side) of the sampling tube 1, and when the sampling tube 1 is inserted into the raw material layer, the sample of the sintering raw material flows into the sampling tube 1 from the opening 1a. enter the In order to reduce insertion resistance at that time, the lower end of the collection tube 1 may be sharpened. On the other hand, through the opening 1b at the upper end of the sampling pipe 1 (upper surface side of the pipe), the rotary propelling blade 3 of the rotary penetrating pile 4 is inserted. A flange portion 1c may be provided around the opening 1b at the upper end. In addition, as described in the aforementioned Patent Document 1 (Patent No. 5697528), this sampling tube 1 has a plurality of slits for inserting partition plates on the side surface of the sampling tube 1 at equal pitches in the axial direction. You may make it provide. As a result, the columnar sample of the sintering raw material collected in the sampling tube 1 can be divided perpendicularly to the axial direction, which is convenient for analyzing the sample in the depth direction of the raw material layer.

On the other hand, for the rotary penetration pile 4 , the outer diameter (diameter) of the rotary propulsion blade 3 is made substantially equal to the inner diameter of the sampling pipe 1 . Therefore, by lowering the pile body 2 while rotating it as a rotation axis, the rotary penetration pile 4 advances (excavates) in the raw material layer due to the screwing action of the rotary propelling blade 3, and the rotary propelling blade 3 moves to the lower end of the sampling pipe 1. , the rotary propulsion blade 3 closes the opening 1a of the sampling tube 1 and serves as a bottom cover. With respect to the shape of the rotary propulsion blade 3, preferably, as shown in FIG. 1, two semicircular blades, which are obtained by dividing a disk into two halves, are attached so as to be alternately inclined with the pile body 2 interposed therebetween. It may be vane type rotor blades 3a, 3b, or, as shown in FIG. In any case, these vane-type rotor blades 3a, 3b and spiral rotor blades 3c are preferably attached at one pitch (one cycle) around the pile body. This is because as the number of rotor blades and the number of pitches increase, the possibility of pulverizing the particles of the raw material for sintering during the rotary penetration increases. Note that the tip of the pile body 2 may be sharpened.

Here, it is considered that there is an appropriate value for the feed, which is the translational distance when the vane-type rotor blades 3a and 3b and the spiral rotor blade 3c make one revolution. In other words, if the feed becomes too large, the rotary penetration pile 4 can penetrate to the opening 1a on the lower end side of the sampling pipe 1 at a lower number of revolutions, so the penetration time can be shortened, but the vane-type rotor 3a and Since the gap in the height direction with the vane-type rotor blade 3b and the gap in the height direction with the spiral rotor blade 3c are also widened, the sintering raw material corresponding to this gap is well inside the sampling tube 1. There is a risk that it will not be possible to scoop it up. On the other hand, if the feed is too small, the number of rotations of the rotary penetration pile 4 required to penetrate to the opening 1a on the lower end side of the sampling tube 1 increases, and the penetration time increases, and the particle diameter increases. The vane-type rotor blades 3a and 3b and the spiral rotor blade 3c collide with the sintered raw material having a large diameter, and the intrusion is stopped. There is a risk of changing the arrangement state of Therefore, the feed should be at least larger than the grain size of the raw material for sintering.

In the sampling apparatus of the present invention, the sampling tube 1 has an elevating mechanism that can be inserted into and pulled out of the raw material layer. Further, the rotary penetrating pile 4 has an elevating mechanism capable of inserting and extracting from the raw material layer, and has a rotating mechanism capable of rotating the rotary propelling blade 3 . Here, as shown in FIG. 3( a ), the sampling pipe 1 and the rotary penetration pile 4 may be individually equipped with a lifting mechanism 5 . Alternatively, as shown in FIG. 3B, the extraction pipe 1 and the rotary penetration pile 4 are provided with a common lifting mechanism 5 so that the vertical movements of the extraction pipe 1 and the rotary penetration pile 4 are integrated. can be

Of these, the elevating mechanism may be any device that has the function of vertically elevating the sampling pipe 1 and the rotary penetration pile 4 and inserting and withdrawing them into and out of the raw material layer. A lifting device can be used. At this time, for example, a column extending in the vertical direction may be provided, and the sampling pipe 1 and the rotary penetration pile 4 may be inserted and removed from the raw material layer along the column. On the other hand, the rotation mechanism 6 of the rotary penetration pile 4 may be any mechanism as long as it has the function of rotating the rotary propeller blade 3 with the pile body 2 as the rotation axis, and a known rotary drive device such as a motor is used. can do. Here, when a cylinder is used as a device for vertically raising and lowering the rotary penetration pile 4, the rotation and elevation of the rotary penetration pile 4 are integrally performed by using a rotatable cylinder shaft. may

As for the method of taking a sample of the sintering raw material from the raw material layer of the sintering raw material charged into the sintering palette of the sintering machine using such a sampling device, preferably, the following method is shown. can be done. The following description focuses on whether or not the extraction pipe 1 and the rotary penetration pile 4 are inserted into the raw material layer at the same time, and the present invention is not particularly limited except for this point.

FIG. 4 shows an example of a method of individually inserting the sampling pipe 1 and the rotary penetration pile 4 into the raw material layer 7 . In this case, the sampling method of the sintering raw material includes a step of lowering the sampling tube by an elevating mechanism and inserting it into the raw material layer, rotating the rotary penetration pile by a rotating mechanism and lowering it by an elevating mechanism and inserting it into the raw material layer, When the rotary propelling wings of the rotary penetration pile reach the opening of the sampling pipe, the rotation by the rotating mechanism is stopped and the opening of the sampling pipe is closed with the rotary propelling blade; and withdrawing from the layer.

More specifically, first, as shown in FIG. 4(a), the sampling tube 1 and the rotary penetration pile 4 of the sampling device are arranged above the raw material layer 7 of the sintering raw material charged into the firing pallet. Next, the extraction tube 1 is vertically lowered by the elevating mechanism of the extraction tube 1, and the extraction tube 1 is inserted into the raw material layer 7 to a desired depth. As a result, the sintering raw material in the desired position of the raw material layer 7 is filled into the sampling tube 1 through the opening 1a at the lower end of the sampling tube 1 .

Next, as shown in FIG. 4(c), the rotation mechanism of the rotary penetration pile 4 rotates the pile body 2 about the rotation axis, and the rotary penetration pile 4 is vertically lowered by the elevation mechanism of the rotary penetration pile 4. is inserted into the raw material layer 7. At this time, since it advances in the raw material layer due to the screwing action of the rotary propulsion blade 3, the pulverization of the granulated sintered raw material is also suppressed, and when it is inserted to the desired depth, the opening 1a of the sampling tube 1 is inserted into the rotary penetration pile. 4 is blocked by the rotary propulsion blade 3.

Next, as shown in FIG. 4(d), without rotating the rotary penetration pile 4, the sampling pipe 1 and the rotary penetration pile 4 are lifted vertically by their respective elevating mechanisms to pull them out of the raw material layer. (Remove) As a result, the columnar sample 8 can be collected while the raw material layer 1 is in the filled state without causing the columnar sample 8 in the collection tube 1 to drop downward. Moreover, unlike the case where the opening of the sampling tube is closed by rotating the arm, there is no possibility that the sintering raw material outside the sampling tube will be pressed by the arm and the sampling tube 1 will be deformed. 1 itself can be thinned and lightened, and the work load of the columnar sample collection operation that is subsequently performed can be reduced.

On the other hand, FIG. 5 shows an example of a method of simultaneously inserting the extraction pipe 1 and the rotary penetration pile 4 into the raw material layer 7 . In this case, the sintering raw material is sampled by inserting the pile body of the rotary penetrating pile into the sampling pipe, rotating the rotary penetrating pile with the rotating mechanism, and lowering the sampling pipe and the rotary penetrating pile with the lifting mechanism. and inserting it into the raw material layer, stopping the rotation by the rotating mechanism and closing the opening of the sampling pipe with the rotary propeller blade of the rotary penetration pile, and removing the sampling pipe and rotary penetration pile from the raw material layer. and a step of performing.

More specifically, first, as shown in FIG. 5(a), the sampling tube 1 and the rotary penetration pile 4 of the sampling device are arranged above the raw material layer 7 of the sintering raw material, as in the case of FIG. However, in this case, the pile body 2 of the rotary penetrating pile 4 is inserted into the sampling pipe 1 in advance, and the rotary propulsion wings 3 of the rotary penetrating pile 4 block the opening 1a of the sampling pipe 1. keep it. Next, as shown in FIG. 5(b), the sampling pipe 1 and the rotary penetration pile 4 are simultaneously lowered vertically by the elevating mechanism and inserted into the raw material layer 7. Then, as shown in FIG. At this time, it is preferable to rotate the rotary penetration pile 4 by a rotation mechanism so that the excavation speed by the rotary propeller blade 3 and the descending speed of the sampling pipe 1 and the rotary penetration pile 4 are synchronized.

Then, as shown in FIG. 5(c), when the extraction pipe 1 and the rotary penetration pile 4 are inserted to the desired depth in the raw material layer 7, their descent and rotation are stopped. Next, as in the case of FIG. 4 above, as shown in FIG. 5(d), without rotating the rotary penetration pile 4, the extraction pipe 1 and the rotary penetration pile 4 are lifted vertically by their respective elevating mechanisms. and pull them out (extract) from the raw material layer. As a result, a sample of the raw material for sintering (columnar sample 8) can be collected in the same manner as in the previous case. Moreover, in the method shown in FIG. 5, since the sampling pipe 1 and the rotary penetration pile 4 are inserted at the same time, the time required for sampling can be shortened.

The sampling device according to the present invention can be installed on a frame that spans the sintering pallet of the sintering machine in the width direction, in the same manner as the device described in Patent Document 1 above. The mount may be fixedly installed at a predetermined position of the sintering machine, or may be installed so as to be movable in the longitudinal direction of the sintering machine. Alternatively, it may be transported by transport means such as a crane and mounted at an appropriate position. As for the installation location, it is preferable to install it downstream in the traveling direction from the charging device that charges the granulated sintering raw material into the firing pallet. In this case, the positional relationship with an ignition device (ignition furnace) that has a burner or the like and ignites the upper layer of the raw material layer is not particularly limited. However, when installed on the downstream side of the ignition furnace, the ignition furnace is temporarily stopped so that the upper layer of the raw material layer is not ignited by the ignition furnace in the vicinity of the sampling position in the baking pallet. It is desirable to take measures such as suppressing the amount of combustion and covering the surface of the raw material layer with a non-combustible or flame-retardant sheet or the like. Similarly, when installed downstream of the ignition furnace, the sampling device should be installed as close to the ignition furnace as possible. As described above, it is advisable to take some measures to prevent ignition in the vicinity of the sampling position, but the area further outside is ignited. Therefore, if the distance from the ignition furnace to the sampling device is long, the burning area will propagate horizontally from the ignited area. In order to prevent this, it is necessary to widen the area where no ignition takes place, but doing so leads to deterioration in the productivity of the sintering machine. It is desirable to collect a sample (columnar sample) from the raw material layer of the sintered raw material before ignition in this way.

Further, the pedestal as described above may be made to function as a guide rail so that the sampling device can be moved in the width direction of the baking pallet. At this time, the worker may manually move the sampling device in the width direction of the baking pallet, or may move it using the power of a drive source such as an electric motor. This makes it possible to collect a sample from the raw material layer at any position in the width direction of the baking pallet.

Further, in the present invention, as shown in FIG. 6, an auxiliary lid 9 arranged on the side of the opening 1a of the extraction pipe 1 closed by the rotary propeller blade 3 of the rotary penetration pile 4 may be further provided. . As a result, the opening 1a of the extraction pipe 1 inserted into the raw material layer 7 is blocked by the rotary propelling blade 3 of the rotary penetration pile 4, and in this state, after the extraction pipe 1 and the rotary penetration pile 4 are removed from the raw material layer 7, By further closing the opening 1a of the sampling tube 1 with the auxiliary lid 9, for example, when the sampling device is moved in the width direction of the sintering pallet, part of the columnar sample 8 (sintered raw material) can be prevented from spilling onto the raw material layer 7 side. Such an auxiliary lid 9 may be simply plate-shaped, or may be dish-shaped so as to accommodate the dropped sintering raw material.

According to the present invention, it is possible to sample the sintering raw material sample (columnar sample) while maintaining the actual filling state, and the depth position of the sampled sample is also clear, so that the firing pallet is filled. It is possible to directly grasp the state of the raw material to be sintered. Moreover, since the sampling apparatus of the present invention reduces the mechanical load generated during sampling, it can be applied even when the layer thickness of the raw material layer charged to the baking pallet is increased. Furthermore, it is also possible to reduce the weight of the device and reduce the workload.

EXAMPLES Next, the present invention will be described based on examples, but the present invention is not limited to the following contents.

<Test 1>
First, it was investigated to what extent a rotary penetrating pile like the present invention could play the role of a bottom cover that closes the opening at the lower end of the sampling pipe. In this test, a cylindrical extraction tube made of ordinary steel with an inner diameter of 150 mm, a thickness (plate thickness) of 3 mm, and a length of 900 mm with both ends opened was prepared. However, the lower end of the collection tube is sharpened at the tip. On the other hand, as a rotary intrusion pile, a round bar made of ordinary steel with a diameter of 13 mm and a length of 1000 mm is used as the pile body, and a blade-type rotary blade is fixed near the tip of the pile body. A spiral rotary blade was fixed to the blade. Among these rotary propulsion blades, the vane-type rotor is manufactured by dividing a disk-shaped flat plate with a diameter of 145 mm and a thickness of 2.3 mm into two halves, as shown in FIG. The rotary blades 3a and 3b are inclined by 20 degrees with respect to the horizontal plane (ground), and are oriented alternately so that the angle formed by them with respect to the pile body 2 is 40 degrees, and The lower ends of the vane-type rotor blades 3a and 3b were attached so as to be at the same height as the tip of the pile body 2 (this is called a rotary penetrating pile having a "wing (screw)"). On the other hand, for the helical rotor blade, as shown in FIG. 8, a disk-shaped flat plate with a diameter of 145 mm and a thickness of 2.3 mm was partially cut and stretched in the height direction to obtain the height of the helical rotor blade 3c. The direction gap (gap) L is 55 mm, and the lower end of the spiral rotor blade 3c is installed so that it is at the same height as the tip of the pile body 2 (this is called a "spiral A”) and a disk-shaped flat plate with a diameter of 145 mm and a thickness of 2.3 mm, so that the above gap L is 110 mm (this is called a rotary penetration pile with “spiral B” (called stakes) were prepared respectively. In addition, the tip of the pile main body 2 is sharpened for any of the rotary penetrating piles.

In the test, first, only the sampling tube was moved at a speed of 0.1 to 6.0 m / min to the box-shaped container in which the sintering raw material was charged so that the height of the raw material layer was 700 mm. Insert until the opening reaches the bottom of the box. Then, it was lowered vertically at a speed of 0.1 to 6.0 m/min by inserting the rotary propulsion blade of the rotary penetration pile into the opening at the upper end of the sampling pipe. At that time, the pile body of the rotary penetration pile was rotated at a speed of 1.8 to 110 rpm until the tip of the pile body reached the bottom of the box-shaped container. When the tip of the pile body reaches the bottom of the box-shaped container, the rotation is stopped, and in this state, the sampling pipe and the rotating penetration pile are slowly raised vertically at a speed of about 0.5 m/min to form the raw material layer. This test was conducted using three types of rotary penetration piles with different rotary propulsion blades (the present invention example). At that time, the torque at the time of rotation penetration into the raw material layer by each rotary penetration pile was measured. was 0.85 and the torque for the rotary penetrating pile with "helix B" was 1.62. The sintering raw material used in the test has a particle size of about 20% by mass if it is larger than 5 mm, about 55% by mass if it is 5 mm or less and larger than 1 mm, and about 25% by mass if it is less than that. The water content is about 7.0% by mass.

On the other hand, in order to compare the above results, after inserting the sampling tube into the raw material layer of the box-shaped container in the same manner as above, the sintered raw material outside the sampling tube was discharged from the box-shaped container, and the height of the raw material layer was measured. After lowering the tube, a flat plate was inserted into the opening at the lower end of the sampling tube to cover it. Then, the extraction tube was removed from the box-shaped container with the opening covered with a flat plate, and the weight of the sintering raw material filled in the extraction tube was measured (comparative example). Each such test was performed five times, and the weight of the sintered raw material taken was compared. The results are as shown in FIG. 9, and it was found that the sintering raw material can be collected with almost no loss even when the sintering raw material is collected by inserting a rotary penetrating pile into the sampling pipe as in the present invention. In addition, in Fig. 9, the average mass (sample collection amount) when the opening at the bottom of the sampling pipe is covered with a flat plate is set to 1, and the average mass (sample collection amount) when the rotary propulsion blade of each rotary penetration pile is covered. amount) is shown as a relative value, and it can be said that the results are equivalent to the case where the lid is made of a flat plate, within the error range.

<Test 2>
In Test 2, in the same manner as in Test 1, each rotary penetration pile was used to cover the opening at the bottom of the sampling tube, and the sintering raw material was collected from the raw material layer charged into the box-shaped container. In addition to (Invention Example) and when the opening at the lower end of the sampling tube was covered with a flat plate and the sintering raw material was sampled in the same manner (Comparative Example), a box-shaped auger was used for geological surveys. The sintering raw material was sampled from the raw material layer charged into the container (comparative example), and the influence of the sintering raw material on the raw material particles in each method was investigated as follows.

Here, the auger is made of ordinary steel, and has a spiral blade with a diameter of 80 mm continuously engraved on the top and bottom of a round bar-shaped sampling rod with a length of about 1.5 m. As in Test 1, this was manually rotated and penetrated into a box-shaped container (the height of the raw material layer was 700 mm) in which the sintering raw material was charged, and the tip of the auger reached the bottom of the box-shaped container. By the way, the sintering raw material was sampled by stopping the rotary penetration of the auger and withdrawing it vertically upward from the raw material layer. Then, when the rotation penetrating pile according to the present invention is used to cover the opening at the lower end of the sampling pipe, when the flat plate is used to cover the opening at the lower end of the sampling pipe, and when this auger is used , the weight of each collected sintering raw material was measured, and among them, particles having a diameter of 5 mm or more were sieved to obtain the mass thereof. At that time, the sampling test of the sintering raw material was performed 3 to 5 times in each case, and the proportion of the sintering raw material having a diameter of 5 mm or more in the sampled sintering raw material was calculated. The sintering raw material used in this test contains particles of various sizes ranging from those with a diameter of 10 mm or more to those with a diameter of 0.1 mm or less.

The results are as shown in FIG. Here, the average mass when the opening at the lower end of the sampling tube is covered with a flat plate is set to 1, and the average masses in other cases are shown as relative values. As can be seen from FIG. 10, the proportion of particles with a diameter of 5 mm or more in the sampled sintering raw material is remarkably low in the auger. On the other hand, in the case of the example of the present invention using the rotary penetrating pile, the relative value was about 1 within the error range. In other words, according to the present invention, it was shown that sampling is possible while maintaining the particle size distribution of the raw material for sintering.

1, 11: sampling tube, 1a, 1b, 11a: opening, 1c: flange, 2: pile body, 3: rotary propulsion blade, 3a, 3b: vane-type rotary blade, 3c: spiral rotary blade, 4: Rotating penetrating pile, 5: Lifting mechanism, 6: Rotating mechanism, 7: Raw material layer, 8: Columnar sample, 12: Joint part, 13: Arm, 14: Bottom cover, 15: Rotating shaft.

Claims (8)

A sampling device for collecting a sample of the sintering raw material from the raw material layer of the sintering raw material charged into the firing palette of the sintering machine,
a collection tube having an opening at its lower end and equipped with an elevating mechanism capable of being inserted into and removed from the raw material layer;
It has a pile body that is inserted into the sampling pipe, and a rotary propeller wing is fixed only near the tip of the pile body, and has an elevating mechanism that can be inserted into and removed from the raw material layer, and the rotary propeller wing. and a rotating penetrating pile equipped with a rotating mechanism capable of rotating
With the extraction pipe and the rotary penetration pile inserted into the raw material layer, the rotary propelling wings of the rotary penetration pile block the opening of the extraction pipe, and the extraction pipe and the rotary penetration pile are extracted from the raw material layer. A sintering raw material sampling device characterized by collecting a sample of the sintering raw material from the raw material layer. The sintering raw material sampling device according to claim 1, wherein the sampling tube and the rotary penetrating pile have separate elevating mechanisms, or the sampling tube and the rotary penetrating pile have a common elevating mechanism. The sintering raw material sampling device according to claim 1 or 2, further comprising an auxiliary lid arranged on the opening side of the sampling pipe closed by the rotary propelling blade of the rotary penetration pile. The sintering raw material sampling device according to any one of claims 1 to 3, wherein the rotary propelling blade of the rotary penetrating pile is a helical rotary blade attached by spirally turning around the pile body . Claims 1 to 1, wherein the rotary propelling blade of the rotary penetrating pile is a blade-type rotary blade in which two semicircular blades obtained by dividing a disk in half are attached so as to be alternately inclined with the pile body sandwiched therebetween. 4. The sintering raw material sampling device according to any one of 3. The sintering raw material sampling device according to any one of claims 1 to 5, wherein the rotary propeller blades of the rotary penetration pile are attached at one pitch (one cycle) around the pile body. A sintering raw material sampling method for collecting a sample of a sintering raw material from a raw material layer of a sintering raw material charged into a sintering palette of a sintering machine using the sampling device according to any one of claims 1 to 6. and
a step of lowering the collection tube by an elevating mechanism and inserting it into the raw material layer;
While the rotary penetration pile is rotated by the rotary mechanism, it is lowered by the elevating mechanism and inserted into the raw material layer. closing the opening of the tube with a rotary propulsion blade;
A step of removing these sampling pipes and rotary penetration piles from the raw material layer;
A sampling method for sintering raw materials, characterized by comprising: A sintering raw material sampling method for collecting a sample of a sintering raw material from a raw material layer of a sintering raw material charged into a sintering palette of a sintering machine using the sampling device according to any one of claims 1 to 6. and
While the pile body of the rotary penetration pile is inserted into the extraction pipe, the rotary penetration pile is rotated by the rotation mechanism, and the extraction pipe and the rotary penetration pile are lowered by the elevating mechanism and inserted into the raw material layer. process and
A step of stopping the rotation of the rotating mechanism and blocking the opening of the sampling pipe with the rotating propulsion wings of the rotating penetrating pile;
A step of removing these sampling pipes and rotary penetration piles from the raw material layer;
A sampling method for sintering raw materials, characterized by comprising:

Images