System Analysis of Mineral Coal Preparation as the Basis for a Mathematical Model

摘要

The system mineral-coal dressing is split into its elements, analyzed, systemized by the basic process, process steps and dressing method, identified and represented in a coordinate system. Basic process and process steps can be traced back to three basic functions, i.e. separation, collection, change of characteristic. The dressing methods used at present are identified by eight different logical YES-NO combinations for the steps: primary classifying, separating, desliming and sorting. The pattern developed which is generally applicable for mineral coal dressing permits their being represented and described with the aid of 51 activities (mass flows) and 41 functions. It constitutes the basis for a simulation, a mathematical description, for optimization, process controlling and, consequently, for a mathematical model. In the industry model for mining, coal preparation lies at the intersecting point of the two control systems, feed forward and feed back. It has the task, on the other hand, of producing the highest possible total value of salable products from the available raw material with the lowest possible expenditure, but, on the other hand, of satisfying the market's demands, to the greatest extent possible, with the raw coal supplied. The combination of both control systems in one operations model, coal mining, makes technical-economic optimization possible. This is also true for the sub-area coal preparation for which technical-economic optimization is only possible with the help of a mathematical model. (ERA citation 06:006907)