SU787086A1 - Method of classifying crude asbestos concentrates - Google Patents

Description

With the known routine control in the computer 5, V ° solves the task of bringing the production plan for asbestos trademarks (i 1, 2, .., N) and the compositions specified by GOST to the inputs of classifying devices 4 according to the well-known model of the last stage of the process. At the same time, the definition of the performance of V (i 1, 2...,. N) and the content of the main for i-lines of the sieve process — oij, and the sieve of the main sieve and dust — are determined at the inputs of the classifying apparatus of the penultimate stage.

. Dp of stationary flows at the process inlet and continuous operation of the technological scheme by sensors 2 are measured and fed to the computer 5 values of the performance of oversize flows at the outputs of the classifying apparatus 1 (1 (p 1, 2, .., N) and content for p-th lines of sieve a, sifting of the main sieve-in and dust Qp (p), 2, .., N). Values, Qn. (n 1, 2,.,., N) and

atr bh

B ;, b1 (1 1.2N

Vi. Are the source data for the problem solved in computer 5 of finding the optimal values of the flux distribution coefficients (n, 2, ..., N, (i 1, 2, ..., NJ, equal to the part of the superlattice from the output of the nth apparatus of the penultimate stage sent to the input of the ith apparatus of the last stage of the process.The requirements for performing the compositions, jbt 1 (1, 2, ..., N) on the inputs of the classifying apparatus 4 are written in the form of the material balance equations. | To find the optimal performance on the inputs of the classifying apparatus enter the criterion (h, sign which should be minimized.

G, maxdW -V), (Wj, -Vg). . . , / M „-ts

As a result of solving the formulated problem of mathematical programming, one of the known methods determines the optimal values of the distribution coefficients bn and the optimal performance W | at the inputs of classifying apparatus 4, minimizing the criterion Q. The W;

distribution of oversize products TOBJ In accordance with the optimal values of the distribution coefficients are carried out with the help of distributing devices 3. Sludge: The helix of the produced flows is produced in the classifying apparatus 4 of the last stage simultaneously with their classification

As a result, the production of an optimal amount of asbestos trademarks of a given composition is ensured.

When the flow parameters at the output of the classification process change, the values of Up, a, b, gn (, 2, ..., N) are again measured and entered into the computer 5. The computer solves the problem of finding the new optimal values of the distribution coefficients b „1 (n 1, 2, ..., N,., 2, ..., N) and the optimal volume of production of asbestos trademarks. Switchgears 3 redistribute the oversize flows at the outlets of classifying apparatus 1 of the penultimate stage in classifying devices 4 produce charges of the resulting flows.

When a scheduled task is changed, the task of bringing a new task according to the inputs of classifying devices 4 is solved in order to obtain new initial data of the mathematical programming problem.

The use of the proposed method provides: a reduction in contact costs due to the exclusion of special apparatus for blending and possibly on any technological scheme of the classification process of feed asbestos concentrate.

Claims (2)

1. The practice of enrichment asbestos RPM. Ed. F.P. Sarrapova. M., Nedra, 1975 / s. 75-76. 2. Panich Yu. V. and others. Quality management of finished products of asbestos processing plants. Of. Universities, Torn journal. 1977, № 1, p.131138 (prototype). n / TOHoSfle