SU1572703A1 - Method of controlling the process of concentration of coal - Google Patents

Abstract

The invention relates to the automatic control of coal processing processes using computers and can be used in the coal and coke industry. The goal is to improve the control accuracy by taking into account the distribution of individual coal components (KU) by enrichment. For this purpose, in the process of coal enrichment, which includes separation of heavy media, jigging and flotation, the sieve and fractional composition of industrial productive and rock fraction KU ash content of total concentrate (SC) and ash product commercial product is measured. The ash content of the SC is maintained constant by changing the output of the concentrate of the separation of the ash content of the commercial intermediate product by changing its output. Next, the enrichment is determined in proportion to the outputs of industrial products and rock CU fractions. The most difficult to enrichment CU, the size class of the most difficult to enrichable CU, enriched in the separation of heavy media and the CU size classes, enriched in the flotation section, are identified. The weighted average value of the enrichment index of the CU enriched in the flotation unit is determined. The separation density of separation of heavy media is inversely proportional to the enrichment of the most difficult to enrichment CU, maintaining the ash content of the concentrate of the most difficult to enrichment component of the separation of heavy media, equal to the ash content of the coal preparation process. The ash content of the flotation separation concentrate is directly proportional to the weighted average of the enrichment of CU enriched in the flotation compartment. 1 il.

Description

The invention relates to the automatic control of coal processing processes using computers and can be used in the coal and coke industry.

The aim of the invention is to improve the control accuracy by taking into account the distribution of the individual components of coal in terms of availability.

The drawing shows a block diagram of an apparatus for implementing a method for controlling a coal preparation process.

The method consists in determining the enrichment proportionally to the outputs of industrial products and rock fractions of the coal components, separating the difficult coal component, separating the coal difficult fraction component, enriched in the separation of heavy media, separating the coal component sizes, enriched in the flotation separation , determine the weighted average value of the enrichment ratio of the coal components enriched in the flotation unit, change the separation density of the OT separation of heavy media inversely proportional to Mosti ionalno Enrich refractory component coal, maintaining the ash concentrate refractory component separating heavy media equal to the total ash content of the coal concentrate upgrading process, a flotation concentrate ash separation is varied in direct proportion to a weighted average obogati- Mosti components coal flotation in concentrating compartment.

where1Tz is the output of industrial and rock fractions, respectively;% Industrial products include fractions of coal components of 1400-1800 kg / m3, if the ash content of the coal fraction with a density of less than 1500 kg / m does not exceed 10% (otherwise - fraction 1400-1800 kg / m3). Depending on the values of the indicator of objectivity, the coal is divided into four categories: light at, medium at T 5–10%, hard at T 10–15% and

corresponding to the enrichment of each component of coal, allocate the maximum value of the enrichment ratio T (select the difficult to enrichment component of coal). For etonosti suspension in the separation of 2 heavy media, the entrance of the system 12 stabilization of the ash content of the total concentrate of separation 3 jigging and the entrance of the system 13

Example. The coal enrichment process includes the following enrichment process steps: flotation 1, heavy media 2,

jigging 3 and monitoring jigging 4. Set-15 is very difficult at. The device for carrying out the proposed N from the obtained numerical values of T, according to this method, contains a sampler 5 connected with block 6 for determining the sieve and fractional composition of coal components supplied to the enrichment, the output of which is associated with the computing machine 7 that is difficult to enrich the coal component information makes the size class enriched in

from ash sensors of the total con-separation of heavy media. For a class of krupcentrath 8 and intermediate product 9. Exits of a height of a hardly-rich component of coal,

the numeral machine 7 is connected with the intake of heavy media 2,

System 10 for optimizing the process of flotation-2k in its calculation of the composition in the calculation, the input of the system and the stabilization of the compactor machine 7 build enrichment curves A, (3 and b, which determine the separation density of the separation of 2 heavy media.

Taking into account the fact that the middling product of the stabilization of the ash content of the middling control product after crushing enters the re-bore jigging 4. The damping in the control jigging mash coal is separated by a large amount, the specific gravity of the separation for the mixture

ti into three size classes, enriched with industrial and concentrate fractions

in the compartments of heavy media 2 (for example, the second stage of medium separators

class +13 mm), jigging 3 (for example, it is advisable to choose such that the loss

class 13-0.5 mm) and flotation 1 (class 35 of light fractions with wastes were minimal — 0.5 mm). It has been established that the most rational density of separation of the mixture in this case is the density, which allows for the concentration of the most difficult to enrich coal component to be obtained from it with an ash content equal to that of the total concentrate. In this case, the separation of the mixture is carried out in a zone of low densities, the separation error is small, and the re-enrichment in the control product — upon re-enrichment of the industrial transfer machine — enters, besides the product of the compartments of heavy media 2 and the otsad product, a certain part of the concentrate

ki of fine coal 3 in the control oct-fractions of coal components with a lighter

Dachnoy car.

The sampler 5 systematically selects the ash content of the concentrate and is the most difficult to sample for each component of the coal. . In block 6, the sieve and fractional composition of each coal component is determined. All measured values are stored in the memory of the calculating machine 7. In the latter, according to optimization, 10 through 10. The task of optimizing the optimization system 10 in the unit 6, the optimization of the components of the coal, is determined in a computational engine of the enrichment T of each component bus 7, which is determined taking into account

The crushed coarse middlings of 2 heavy media are mixed with the middlings of the 3 jiggers and re-enriched in a control jigging machine. The total concentrate is obtained by mixing the concentrates of the technological sections of the flotation unit 1, heavy media 2, jigging of fine coal 3 and control jigging 4, and commercial 40

but in proportion to the enrichment of the most difficult to enrichment component of coal. Process 1 of flotation is optimally maintained by an individual system.

(calculation is made in accordance with ST SEV 4386-83 "Coal and anthracite. Method of determining enrichment)

, (100 - a),

where1Tz is the output of industrial and rock fractions, respectively;% Industrial products include fractions of coal components of 1400-1800 kg / m3, if the ash content of the coal fraction with a density less than 1500 kg / m does not exceed 10% (otherwise fractions of 1400-1800 kg / m3). Depending on the values of the indicator of objectivity, the coal is divided into four categories: light at, medium at T 5–10%, hard at T 10–15% and

very difficult at. From the obtained numerical values of T, corresponding to the enrichment of each component of coal, the maximum value of the enrichment index T is selected (the difficult component of coal is separated). For it is very difficult at. From the obtained numerical values of T, the correspondingly difficult to enrichment component of the coal, the class of size is enriched, enriched in

by changing the density of the cutting in the compartment of 2 heavy media of reverse optimization 10. The task for the ash content of the optimization system 10 is preliminarily formed in the computing machine 7, in which it is determined taking into account

but in proportion to the enrichment of the most difficult to enrichment component of coal. The flotation process 1 maintains in the optimal mode the individual sys- teled fate of the components of the coal classes enriched in the flotation unit, the weighted average value of the enrichment index Ter. The task for the ash content of the flotation process concentrate to the optimization system 10 is directly proportional to the weighted average enrichment ratio of the coal components enriched in the flotation section 1.

this increases the yield of the separation unit 3 and the total concentrate. For re-enrichment in the process compartment 4 enters the mixture with a smaller amount of concentrated fractions. The ash content of the control jigging increases, the feed enrichment becomes more severe. The ash content of the industrial product produced by compartment 4 increases. Computer 7 determines settings

With the selected modes of operation, the stabilization system 13, which influences the intermediate separators and flotation machines, affects the process compartment 4 and the fasteners with sensors 8 and 9 measure the current values of the ash content of the total concentrate and conditioned intermediate product.

The information from sensors 8 and 9, is also fed to the output of the total concentration in the computer 7, where is compared to 15 times. The yield and ash content of the total maintain the current values of the ash content from behind the product while increasing. Downtrodden. In this case, there are three possible values of the ash content of the total end: the ash content of the total concentrate concentrate and the intermediate product are analyzed

the middling is not equal to the set value, a computer with a soling machine 7 and, if necessary, a total concentrate more than the required output, new commands are issued on the published one; the ash content of the total concentrate and the change in the yield of the technological industrial product are not equal to the specified, the ash content of Kikh departments 3 and 4. If the actual ash content of the concentrate and industrial product is equal to the specified one, then no calculation is performed and the control commands do not change.

It does not produce a concentrate with lower ash content. The output of the concentrate dispensed by the compartment 4 decreases, the reduced concentrate is less than the predetermined; ash content of the total concentrate and middling equal to the specified.

In the first case, the computer 7 calculates the set points for the stabilization system 12, taking into account the increase in the ash content of the total concentrate. The system 12 controls the process

The invention allows to significantly simplify the management structure, reduce the cost of the system and the cost of its operation 3 and causes it to issue on

} Naturally, reduce dynamic errors and

due to this, to reduce the loss of concentrate with enrichment waste.

Claims (1)

Invention Formula The method of controlling the coal enrichment process, including separation of heavy media, jigging and flotation, based on measuring the sieve and fractionating the centrate with less ash, while reducing the output of the separation concentrate and total concentrate. At the same time, for re-enrichment, the process compartment 4 is fed with a large amount of concentrate fractions. The ash content of the control jigging decreases, the feed enrichment becomes easier. The ash content of the middling produced by the compartment is reduced. Computing machine 7 determines the settings of the system 13 stabilizing compositions of industrial products T of rock; which affects the technological fractions of the coal components, ash separation 4 and forcing it to dispense total concentrate and ash to produce a concentrate with greater ash content. , issued by the department of the total concentrate constant by 4, and the total concentrate is increased by changing the concentrate yield is separated. The yield of the total middling of laziness and the maintenance of ash content is reduced, and its ash content increases — the middling intermediate product is constant, measured. The obtained values of the ash content, the total of its output, characterized in that, with In order to take into account the distribution of individual com- panies, new commands are issued for 50 coal consumption levels, the change in the technological concentrate output is determined in proportion to the outputs of compartments 3 and 4. and the rock fractions, in the second case of the computational elements of coal, are selected, the most difficult is 7, the settings are calculated by the system 12, the enrichment component of coal, the class stabilization, taking into account the reduction of the sol-fineness of the most difficultly enrichment aggregate of the total concentrate. System 12 55 coal ponenta enriched in the control compartment affects the process flow, class 3 size is selected for size and causes it to issue coal nons enriched in the concentrate with a higher ash content. Proflotations determine the weighted average of the stabilization subsystem 13, which affects the process compartment 4 and There is also an output of the total concentrate. The yield and ash content of the total industrial product increases. Polula em produce concentrate with less ash. The yield of concentrate produced by department 4 is reduced, the reduction of the Invention makes it possible to significantly simplify the management structure, reduce the cost of the system and the cost of its operation.  cycles reduce dynamic errors and due to this, to reduce the loss of concentrate with enrichment waste. Invention Formula The method of controlling the coal enrichment process, including separation of heavy media, jigging and flotation, based on measuring the sieve and fractional composition of industrial products T of the rock fractions of the coal components, the ash content of the enrichment of the coal components enriched in the flotation separation changes the density of separation of the separation of heavy media inversely proportional to the enrichment of the most difficult to enrichment component of coal, maintaining the ash content of the concentrate of the most difficult to enriching component eight separating heavy media equal to the ash content of the total coal preparation process concentrate, and the ash content of the flotation separation concentrate vary directly in proportion to the weighted average enrichment of the coal components that are enriched in the flotation unit. Coal coal Class fika sy-1 MM Conientoat 8 shipment Lromproduct 8 shipment