JPH07100543B2 - Component control device for blended raw materials - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a component control device for compounding raw materials for uniformly controlling the component distribution in the longitudinal direction of a pile made by stacking a large number of brands to stabilize the product components in the lower step.

[0002]

2. Description of the Related Art Iron ore temporarily placed in a crude ore yard is cut out from the coarse ore yard by a loader according to a pile loading plan, crushed and sieved in the course of transportation, and agglomerated. It is divided into ore and powder ore and temporarily stored in a sarge hopper, and then quantitatively cut out by a fixed amount cutting device (abbreviated as CFW), conveyed to a bedding yard, and stacked in layers by a stacker.

These piles are called piles, and when pile stacking is completed, the piles are cut out by a reclaimer from one end face in the longitudinal direction of the pile in accordance with the operation of the lower step. 2 is a cross-sectional shape of the pile (a cross section orthogonal to the longitudinal direction), FIG. 3 is a side view of the pile, and FIG. 4 is a view showing the relationship among the pile, the reclaimer, and the stacker.

In FIG. 4, a rail 24 is laid on the side of the pile for stacking the pile 21, and a stacker 6 runs on the rail 24 while stacking the pile, while one pile is piled up. The reclaimer 7 runs on the laid wide rails 22 to discharge the piles 21 piled up. When the stacker 6 is at the edge of the pile 21, it starts to load a certain brand,
If the stacking of the brand can be completed when the pile 21 comes to the end, the distribution of the components in the longitudinal direction of the pile 21 becomes uniform, but in reality this is not possible.

In reality, the stacking of raw materials is carried out by running the stacker at a constant speed if there is raw material on the in-machine conveyor of the stacker, and stopping the stacker when there is no more raw material. Then, during the stacking operation of one pile, the stacker reciprocates several hundred times in the longitudinal direction of the pile. In addition, the stowage order of the brands is determined by the pile stowage plan, and the stowage amount per time is 500 to 30.
The brand changes 200 to 300 times during that period, and the cross section of the pile has 200 to 300 kinds of different brands.
It is in a state of being layered in 300 layers.

Therefore, there are many brand changes in the longitudinal direction of the pile, which causes fluctuations in the raw material components in the longitudinal direction. Japanese Patent Application Laid-Open No. 56-141236 discloses an attempt to solve such a problem. This is provided with a device for detecting the position of the stacker, and means for instructing reservations for starting and stopping cutting of raw materials from a storage tank for various raw materials to be stacked by the stacker. Is the amount of cut-out from the corresponding storage tank that corresponds to the amount of the corresponding raw material loading after the first stacker turnaround time after the instruction, and the calculated value is within the transfer capacity of the transfer system from the storage tank to the stacker. In this case, the cutting of the raw material from the storage tank based on the calculated value is started at the timing at which the stacking of the raw material for the cutting should be started in synchronization with the turning point, and the calculated value exceeds the carrying capacity. In this case, correct this to a value within the carrying capacity and start the raw material cutting from the storage tank based on this corrected value from the above timing or While prohibiting cutout start, if the cutout reserved is instructed, in synchronization with the turn-back point stacker - in which to stop the material cut from 該貯 Tomeso to produce a load breakage.

[0007]

Problems to be Solved by the Invention JP-A-56-1412
The one disclosed in Japanese Patent No. 36 is carried out by controlling the brand and the amount of cutting in advance so that the load will not run out in the middle of the pile in the longitudinal direction. Since the number of raw materials is often reduced, the raw materials are often transported per unit time, the time required for stowage is increased, and the transportation efficiency is reduced, resulting in an increase in power cost. In the present invention, a load dead point (or a brand switching point) is set in the middle of a pile.
It is an object of the present invention to provide a device capable of making the component in the longitudinal direction of the pile uniform even if the above occurs.

[0008]

DISCLOSURE OF THE INVENTION The present invention is intended to achieve the above-mentioned object, and is based on the information on the position and traveling direction of the stacking stacker, the transport amount of the brand and the component of the brand during stacking. Means for calculating the component distribution of the pile in the longitudinal direction, and second means for controlling the brand to be loaded and its amount in the future so that the component distribution becomes uniform based on the component distribution of the pile obtained from the means. And a means for transmitting the pile stacking amount, the actual value of the component and the position information of the reclaimer to the lower process, and the component control device for the blended raw material.

[0009]

[Function] The computer collects the position of stacking stacker, the traveling direction, and the transport amount in real time, and divides it in the longitudinal direction of the pile in advance while collating it with the already input information about the stacking brand (pile stacking plan etc.). The loading amount is added up for each zone, and each zone is completed every time the transportation work is completed (in other words, the loading work for the loading brand at that time is completed).
Calculate the total stowage amount and the average component of the data and store it in the file. This result can be arbitrarily displayed on the CRT screen. The computer compares the above calculation results (total loading amount and average component) with the target loading amount and its average component, calculates the loading remaining amount of each zone and its average component, and displays the CRT screen. Is displayed on the screen to inform the operator.

When the stacking of piles is completed, when the piles are used in the lower process, the stacking amount of each zone of the pile and its average component are transmitted to the lower process according to the request of the lower process. In the lower process, the zone currently used is calculated from these information and the past record of raw material use, and it is used by referring to the actual transition of raw material components, blending action amounts and product components used up to that point. It is possible to know the appropriate compounding action amount for the raw material.

[0011]

EXAMPLES Examples of the present invention will be described in detail below. FIG. 1 is a block diagram of the device of the present invention. The raw material yard computer 1 has information about the positions and traveling directions of the stacker 6 and the reclaimer 7 via the moving machine control device 3 of the stacker 6 and the reclaimer 7, and the brands from the raw material analyzer 2. Information on the components of the fixed quantity cutting device 8 (abbreviated as Constant Feed Weigher CFW) of the surge hopper 8 Information regarding the belt speed of the belt conveyor 9 and the like is received via the belt conveyor control device 5.

Then, the raw material yard calculator 1 calculates the component distribution in the longitudinal direction during the loading from the above information and the component distribution in the longitudinal direction based on the component distribution in the longitudinal direction so that the component distribution will be uniform in the future. Calculate the brand to be attached and the amount to be loaded,
It has a computing unit for controlling.

Further, the computer 1 sends the amount of loading for each divided zone in the longitudinal direction of the pile used in the sintering plant through the transmitting means 15, the actual value of the component and the position information of the reclaimer 7. Etc. to the sintering plant computer 11. The sintering plant computer 11 calculates the blending percentage of the lime powder in the blended raw material based on the information from the raw material yard computer 1, and the quantitative cutting device via the controller 12 of the lime powder quantitative cutting device. The amount of (CFW) 14 cut out is controlled.

Further, the raw material computer 1 calculates the composition and quality of the sintered ore (calculated by the computer 11 for the sintering plant based on the information from the product analysis device 13) and the compounding information stored in the computer 11 for the sintering plant. Can be received and displayed on the CRT screen 16.

Next, a description will be given of the control of the components of the material to be loaded in the material yarn (bedded yard) performed by the material yard computer 1, the work determination of the yard moving machine, and the like.

1) Component control of stowage raw material In FIG. 5, the stowage brand is carried from the crude ore yard to the sarge hopper 31 through the sizing plant, and C
It is cut out with FW8. The cut-out brands are piled on the belt conveyors 32 and 33 from the head of the boom conveyor 34 of the transfer stacker 6 to the bed yard and become the pile 21. The belt speed of the belt conveyor and the moving speed of the stacker are constant, but the feed distance of the raw material differs depending on the position of the stacker.

Therefore, the time until the raw material is cut out by the CFW 8 and loaded on the pile 21 is different. CFW now
The cutting amount of 8 is At / min, the distance from the CFW 8 to the tail of the yaw conveyor 33 is x ₁ m, the distance from the tail of the yaw conveyor 33 to the stacker 6 is x, and the stacker is Mu conveyor 34 length x ₂ m, belt speed y ₁ m / mi
n and the stacker movement speed (travel speed) is y ₂ m / min
The stacker 6 stop position is set to 2y ₂ m before the start of stacking.
And (x ₁ + x ₂ + 2y ₂ ) / y ₁ = 2 minutes, time −2
The raw material C ₁ cut into minutes (2 minutes before) is loaded at a position 2y ₁ m from the starting point of the pile at time 0 minutes. Further, the raw material c ₃ cut out at time 0 minutes is stacked at a position 4y ₁ m from the starting point of the pile at time 2 minutes. FIG. 6 shows this relationship.

(1) Gathering amount and stacker position information collection Information from the control device 3 of the stacker 6 and reclaimer 7 to the position and running direction of the stacker and reclaimer is transferred to the control device 4 of the CFW 8. The information about the cut-out amount of the brand is transmitted to the yad calculator 1 at 1-minute intervals.

(2) Judgment of work status The computer 1 makes the following judgment based on the information about the positions and traveling directions of the stacker and the reclaimer from the control device 3 and the information about the cutting amount of the brand from the control device 4. To do. At this time, the moving speed of the stacker is a constant value y ₂
m / min

If there is no change in the position of the stacker, it is considered to be stopped. b If the position of the stacker has changed by y ₂ m from the previous time, it is considered as working. When the stacker is at the edge of the pile, the traveling direction of the stacker is also determined. c If the stacker is not on the edge of the pile and the change from the previous position is less than y ₂ m, start or end the work.

Work start If the two-previous position and the previous position are the same, the work is started.
Then, work start time of this time, the current de - data collection time - | stacker - of this position - the last position | becomes a / y _2.

When the position before the work is different from the position before the work is ended, the work is ended. Then, work end time of this time, the last of the de - data collection time + | stacker - of this position - the last position | becomes a / y _2.

FIG. 8 shows a flow chart of the above judgment work.

(3) Calculation of relation between cutting amount, stowage position and stowage amount After the work situation is determined, the relational calculation of the cutout amount, stowage position and stowage amount is performed. 9, cut raw material is time _{CFW ((x 1 + x 2} + 2y 2) / y 1) stacker late - attached product arrived. Since the stacker is running, the stacking amount Bt / min is A × y ₁ / (y ₁ ± y ₂ ) with respect to the cutting amount At / min. Here, “+” indicates that the pile is moving away from the starting point, and “−” indicates that the pile is approaching the starting point.
Figure cut amount was weighed at time tn is A _tn is Z _{T (t-1)}
It is shown that they are stacked between Z _Tt and Z _Tt . here,
The loading amount B _t per unit distance is B _t = A _tn / | Z
_{T (t- 1)} -Z _Tt | (ton / m). Here, t-n means n minutes before the time t.

For example, if the zone is divided and managed in units of 1 m in the length direction of the pile, this value is the zone Z.
It is periodically added as a stowage amount C _jt up to _{T (t-1)} -Z _Tt .

That is, C _jt = C _jt-1 + B _t j = Z _{T (t-1) to} Z _T t: this time, t-1: previous time

(4) Total stowage amount and component calculation After the calculation of (3), the total stowage amount and component are calculated. When the loading of one brand is completed, the loading amount C _j in each zone and the component h are weighted averaged by the total loading amount D _j in each zone so far and the average component H _j. , That value is newly used as the total stowed amount and the average component.

D _jt = D _jt-1 + C _jt H _jt = {D _jt-1 × H _jt-1 + C _jt × h} / D _jt

FIG. 10 shows a flow chart of the calculation regarding the brand and the quantity to be stowed in the future. This will be explained below.

(5) Pile stowage amount and component calculation The pile stowage amount D _t and the component H _t are calculated as the sum of the stowage amount of each zone and the weighted average of the components.

[0031]

[Equation 1]

(6) Calculation of the remaining amount to be stowed and the components The future stowage amount is calculated based on the target stowage amount D ₀ and the target component H ₀ determined by the pile combination plan, and the total pile stowage amount D _t and the average component. The weighting amount D _t ^' and the average component H _t ^' are calculated.

D _t ^′ = D ₀ −D _t H _t ^′ = {D ₀ × H ₀ −D _t × H _t } / D _t

Based on this value, the pile composition plan is adjusted to determine the brand and quantity to be actually loaded. After that, the stacking amount of each zone and the stacking amount of each zone required to reduce the variation in the components of each zone are calculated, and the traveling speed of the stacker is changed for each zone. It is also possible.

FIG. 11 is a flowchart for controlling product components in the lower process (sintering plant), which will be described below.

(7) After the piles are loaded, each zone
Pile pile amount D _jt and its component H _jt are determined, and this value is sent to the computer of the sintering plant to start the product control calculation. The position of the reclaimer can be calculated based on the amount of pile cut-out, but the separate recalculator is always used by the yaw computer 1.
Since the position of is collected, it is calculated based on this position.

(8) Calculation of controlled variable Based on the distribution of pile components, the actual amount of lime powder in the sintering plant, and the quality of the sintered ore, the future controlled variable will be calculated based on the time delay. Calculated. This result is transmitted to the CFW control device of the lime powder blending tank and linked to the lime powder blending control.

[0038]

[Equation 2]

FIG. 12 shows an example in which the stacking amount and the distribution of SiO ₂ % in the pile length direction during stacking are displayed on the screen.
3 shows an example in which the total piled amount and the daily change of the average% of SiO ₂ are displayed on the screen.

Although the pile of the sintering raw material has been described above, it goes without saying that the pile of coal and the like can also be applied.

[0041]

Since the present invention is constructed as described above, the following effects can be obtained.

(1) It is possible to easily manage the components in the pile length direction.

(2) Since the pile stacking information (component distribution for each zone, etc.) is transmitted to the lower process, it is possible to accurately control the composition of the lower process and the quality control of the product. it can.

(3) It is possible to adjust the component distribution in the longitudinal direction of the pile to be uniform even if the load is exhausted in the middle of the pile.

(4) By (3), it is possible to relatively increase the stocking amount of the brand (amount cut out by CFW), so that the transportation efficiency is improved and the electric power cost is reduced. Moreover, the loading time can be shortened, which leads to a reduction of the work load.

[Brief description of drawings]

FIG. 1 is a block diagram of a device of the present invention.

FIG. 2 is a diagram showing a cross-sectional shape of a pile.

FIG. 3 is a view showing a side surface shape of a pile.

FIG. 4 is a diagram showing a relationship between a pile, a reclaimer, and a stacker.

FIG. 5 is a diagram showing a relationship between stacking positions of a CFW and a stacker.

FIG. 6 is a diagram showing a stacking position of a brand cut out by CFW, a relationship between a cutting out time and a stacking time.

FIG. 7 is a calculation flowchart of a total stowage amount and an average component.

FIG. 8 is a flowchart of a judgment work for judging the start of work of the stacker, work in progress, and the like.

FIG. 9 is a diagram illustrating a stacking position of a brand cut out in a certain time range.

FIG. 10 is a calculation flowchart of a brand to be loaded next, a loading amount, and a traveling speed of the stacker in each zone.

FIG. 11 is a flowchart of compounding control in the lower step.

FIG. 12: Sucking amount and S in the pile length direction during stacking
Average% of iO ₂ is a diagram showing an example in which the screen display.

FIG. 13 is a diagram showing an example in which the daily change of the total piled amount of piles and the average% of SiO ₂ is displayed on the screen.

[Explanation of symbols]

 1 Raw Material Yard Calculator 2 Raw Material Analyzing Device 3 Mobile Machine Control Device 4 CFW Control Device 5 Belt Conveyor Control Device 6 Stacker 7 Reclaimer 8 Quantitative Cutting Device (CFW) 9 Belt Conveyor 11 Sintering Plant Computer 12 CFW Control apparatus

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kazuhiro Kikuchi 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Katsuko Sunagawa, Examiner, Nihon Kokan Co., Ltd. (56) References JP 62-15617 )

Claims (1)

[Claims] 1. A first means for calculating a component distribution in a longitudinal direction of a pile being stowed on the basis of information on a position and a traveling direction of a stacking stacker, a transport amount of a brand, and a brand component.
Second means for controlling the brand and the amount to be loaded in the future so that the component distribution becomes uniform based on the component distribution of the pile obtained from the means, the pile loading amount and the actual value of the component, and the recovery. A component control device for blended raw materials, comprising a transmitting means for transmitting the position information of the marker to the lower process.