JP2002126568A - Production management/control method for crushed product - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a production management/control method for a crushed product by which the production ratio of a finished product of a desired size can be increased. SOLUTION: The grain size of the crushed product M1 to be discharged from a crusher 5 immediately before the final multi-stage sifting 8 of the crushed product M1 is measured 7 through on-line sampling or off-line sampling. Based on the measurement results, the set value relative to the grain size of an actuator at the crusher 5, is changed by automatic remote-control means 25 and 26 so that the set value corresponds to the grain size of the desired finished product.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a production management control method for a crushed product (product) in an aggregate production facility.

[0002]

2. Description of the Related Art Conventionally, as a production management control method for crushed products, crushed products discharged from a final-stage crusher that is operated in a steady state are sieved in multiple stages, and sieved products of different sizes are screened. The sieved product is appropriately sorted by switching the damper, and the product of each size, for example, No. 5, Special No. 6,
No. 6, No. 7, etc.

[0003]

However, according to the conventional method for controlling production of crushed products, since the crushed product discharged from the crusher at the last stage has a certain particle size distribution, it is sieved in multiple stages. Even if they are divided, the ratio of products of each size becomes constant. On the other hand, there is a problem in that the demand for the products varies in size, and the products of the sizes in which the demand is small become surplus products.

Accordingly, an object of the present invention is to provide a production management control method for crushed products that can increase the production ratio of products of a desired size.

[0005]

In order to solve the above-mentioned problems, a first method for controlling the production of crushed products according to the present invention provides a crushed product discharged from a crusher immediately before finally sieving the crushed products in multiple stages. The particle size of the crusher is measured by online sampling or offline sampling, and based on the measurement result, the setting value of the actuator related to the particle size in the crusher is automatically changed remotely so as to correspond to the particle size of a desired product. . In the second method for controlling production of crushed products, in the first method, the weights of products of each size obtained by appropriately blending the sieved and sieved products of each size are weighed. It is characterized by multiplying and integrating.

In the first method of controlling production of crushed products, the peak of the particle size distribution of the crushed product discharged from the crusher at the final stage matches the particle size of the desired product. or,
In the second production management control method of the crushed product, in addition to the operation of the first method, the production amount of the product for each size is calculated.

[0007] As the final stage crusher, a vertical mill, a cone crusher or the like is used. As an apparatus for measuring the particle size by online (in-line) sampling or offline sampling, a sample that has been dropped and dispersed is photographed by a plurality of imaging devices (for example, a CCD camera or an ITV camera, etc.), and the captured image is analyzed. What calculates the peak of a particle size distribution as a particle size is used. It is preferable that the change of the set value of the actuator related to the particle size is patterned in advance for each size of the product, and is instructed from a remote place. A belt scale is used as a device for weighing and integrating the products of each size.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic configuration diagram of an aggregate production facility provided as an example of an embodiment of a production management control method of a crushed product according to the present invention. In the figure, reference numeral 1 denotes a crushed material M that supplies a crushed product M ₀ of a former-stage crusher (not shown) and an on-screen product SO ₁ of an uppermost tier in a multi-stage sieve described later to a final-stage crusher described later. The intermediate bin 1 is provided with a level detector 2 for detecting the level of the crushed material M and a vibration feeder 3 for variably cutting out the crushed material M. . 4
Is a vertical scale as a final-stage crushing machine for crushing the crushed material M supplied from the belt scale 4, and a belt mill for measuring and integrating the weight of the crushed material M cut out by the vibration feeder 3. vertical mill 5, to adjust the particle size and yield crushed products M _1, etc., vertical mill controller 6
The operation of the actuator is controlled so that the setting values of the actuator relating to the particle size and the like, for example, the number of rotations (granularity) of the table and the pressing force (yield) of the rollers can be changed.

7 is a crushed product M discharged from the vertical mill 5
₁ granularity online (inline) sampling or offline sampling and coarse particles particle size measuring apparatus for measuring, the coarse particles particle size measuring device 7, a sample although not shown was dropped dispersed, CCD cameras and ITV camera or the like and shooting by a plurality of imaging devices, analyzes the captured image, and calculates the peak of the particle size distribution as the particle size of the crushed product M _1.

[0010] 8 is a multi-stage sieve Sieving finally multistage crushing products M ₁ of the vertical mill 5, the multi-stage sieve 8, the mesh 20 mm, 13 mm, 8 mm, 5 mm, 2.5 mm and the five It consists of sieves 8a, 8b, 8c, 8d, 8e, and the crushed product M ₁
From the sieves SO of each sieve 8a, 8b, 8c, 8d, 8e
₁ , SO ₂ , SO ₃ , SO ₄ , SO ₅ and the bottom sieve 8e
Of are those sieved to six undersize product SU, sieved products SO ₁ of the uppermost sieve 8a is stored is returned to the middle pin 1 as described above.

Reference numeral 9 denotes a first damper interposed in the flow path of the product SO ₂ on the second stage sieve 8b, and reference numeral 10 denotes a first damper interposed in the flow path of the product SO ₃ on the third stage 8c. The second damper 11 is connected to one flow path of the sieved product SO ₃ of the _third sieve 8c passing through the second damper 10 and the flow path of the sieved product SO ₄ of the _fourth sieve 8d. An interposed third damper, which switches each flow path to two flow paths.

12 is switched by the first damper 9
Product SO of the second stage sieve 8b_TwoInterposed in one of the channels
And the sieved product SO_Two 1st weighing and integrating the weight of
The first scale 13 passes through the first belt scale 12
Product on the sieve SO_Two And the third damper 11
The sieve product SO to be replaced_Three , SO_Four One of the mixture of
Is interposed in the flow path where the flow path of_Two ,
SO_Three , SO_Four Weighing and integrating the mixture of the second
The second belt scale 13 is a belt scale.
Sieved product SO_Two , SO_Three , SO_Four The mixture of the product
It is stored in the first product yard 14 as 2005
is there. 15 is a second switchable by the first damper 9
On-screen product SO of stage sieve 8b_TwoInterposed in the other flow path of
On-screen product SO_Two Third belts that measure and integrate the weight of
Kale, on a sieve passed through the third belt scale 15
Product SO_Two Is the second product yard 1 as product 20-13
6 are stored. 17 is due to the second damper 10
Product SO of the third stage sieve 8c which is switched _Three of
In the other channel, the product SO on the sieve_Three Weigh the weight of
This is the fourth belt scale that integrates
Screened product SO through scale_Three As product 13-8
It is stored in the third product yard 18. Nineteenth
The sieve product SO switched by the three dampers 11
_Three , SO_Four Is interposed in the other channel of the mixture of
SO_Three , SO_Four Fifth, weighing and integrating the mixture of
The fifth belt scale 19 is a belt scale.
Sieved product SO_Three , SO_Four Of the product 13-5
Is stored in the fourth product yard 20. 2
1 and 22 are the on-screen products SO of the lowermost screen 8e, respectively._Five ,
The sieve product SO is interposed in the flow path of the sieved product SU._Five , Under sieve
6th and 7th belts for measuring and integrating the weight of product SU
And the sixth and seventh belt scales 21 and
2 is the sieve product SO_Five , The sieved product SU to the product 5-2.
Fifth and sixth product yards 23 and 24 as 5, 2.5-0
Is to be stored in

Reference numeral 25 denotes a general operation monitoring and control panel which is connected to the vertical mill control device 6 by a communication line 26 such as RS-232C or RS-422 and is installed at a site office and comprises a personal computer and the like. The control panel 25 has a function of detecting the level of the crushed material M stored in the intermediate bin 1 via the level detector 2 and a crusher (not shown) connected via a communication line 27 to a crusher (not shown). , That is, the function of controlling the weight of the crushed product M ₀ discharged from the crusher and the weight of the crushed material M supplied to the vertical mill 5 via the belt scale 4 and the vibration feeder 3 At the same time, based on the function of measuring and integrating and the setting value of the actuator related to the particle size in the vertical mill 5 based on the measurement result input from the coarse particle size measuring device 7, for example, the rotation number of the table So as to correspond to the size of the desired product,
A function of instructing the vertical mill control device 6 to change according to a pattern selected from a plurality of patterns set in advance, and first to third dampers 9, 10, and 11 for setting the acquisition ratio of each product. And the first to seventh belt scales 12, 13, 15, 17, 19, 2
It has a function of monitoring the production amount of each product based on the integration result input from 1 and 22.

In the aggregate production equipment having the above structure, the crushed material M supplied from the intermediate bin 1 to the vertical mill 5 via the vibrating feeder 3 and the belt scale 4 is supplied to the integrated operation monitoring control panel 25 and the vertical mill control. It is crushed by a vertical mill 5 whose operation is controlled by a device 6, and has a required particle size distribution, for example,
After a crushing products M ₁ peak 13mm in particle size distribution, with sieved by multistage sieve 8, the first to third damper 9 is switched by the overall operation monitoring control panel 25,
It flows according to the flow path formed by 10 and 11,
Seventh belt scale 12, 13, 15, 17, 19, 2
After the weights are weighed and integrated by the first and second products 22, the first to sixth product yards 14, 16, and
18, 20, 23, and 24. When increasing the production ratio of a product of a specific size, the set value of the actuator related to the particle size in the vertical mill 5 based on the measurement result input from the coarse particle size measuring device 7 corresponds to the particle size of the desired product. A desired pattern is selected from a plurality of patterns set in advance as described above, and a command is sent from the integrated operation monitoring and control panel 25 to the vertical mill control device 6 to change the pattern in accordance with the selected pattern. Accordingly, the peak of the particle size distribution of the crushed product M ₁ discharged from the vertical mill 5 is to match the particle size of the desired product.

In the above-described embodiment, the case where the vertical mill 5 is used as a crusher has been described. However, the present invention is not limited to this, and a crusher may be used for a cone crusher. Of course. In this case, as an actuator related to the particle size, a hydraulic cylinder or the like that changes the outlet gap is used.

[0016]

As described above, according to the method for controlling production of crushed products of the present invention, the peak of the particle size distribution of the crushed product discharged from the final stage crusher matches the particle size of the desired product. Therefore, the production ratio of a product of a desired size can be increased. Further, according to the second method of controlling production of crushed products, in addition to the operation and effect of the first method, the production amount of each size product is calculated, so that the production amount of each product size can be managed. it can.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of an aggregate production facility provided as an example of an embodiment of a crushed product production management control method according to the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Intermediate bottle 5 Vertical mill (crusher) 6 Vertical mill control device 7 Coarse particle size measuring device 8 Multistage sieve 12 First belt scale 13 Second belt scale 14 First product yard 15 Third belt scale 16 Second product yard 17 fourth belt scale 18 third product yard 19 fifth belt scale 20 fourth product yards 21 sixth belt scale 22 seventh belt scale 23 5 product yards 24 6 product yards 25 Overall operation monitoring control panel M ₁ crushed Product SO ₁ sieve product SO ₂ sieve product SO ₃ sieve product SO ₄ sieve product SO ₅ sieve product SU ₅ sieve product

 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Yoshiaki Kato 1780, Kamitakano, Yachiyo-shi, Chiba Prefecture Inside the Yachiyo Plant of Kawasaki Heavy Industries, Ltd. (72) Inventor Nori Yamaguchi 1780, Kamitakano, Yachiyo-shi, Chiba Kawasaki Heavy Industries, Ltd. F term in the Yachiyo factory (reference) 4D021 AA01 AB02 AC01 CA03 DC02 EA05 EA10 EB01 4D067 EE05 EE17 EE45 EE48 EE50 GA01 GA05 GB02 GB04

Claims (2)

[Claims] 1. The particle size of a crushed product discharged from a crusher immediately before finally sieving the crushed product in multiple stages is measured by on-line sampling or off-line sampling. A production control method for a crushed product, wherein a setting value of an actuator to be changed is automatically changed remotely so as to correspond to a particle size of a desired product. 2. A crushed product according to claim 1, wherein the weights of products of each size obtained by appropriately mixing the sieved and sieved products of each size are weighed and integrated. Production management control method.