Problems that make the efficiency of broken grinding circuit reach the highest may occur in the following three stages:
(1), the design stage, select the best crushing process must be based on the type, number and size of the processing equipment;
(2), the operating phase, it must select the correct values for the loop that is in the offline those variable quantities, but if it is online these variables are fixed values, such as the feed inlet diameter of swirler and the diameter of the vortex overflow tube;
(3), continuous operational phase, must compensate the changes circuit to the mine, or loop products will appear the undesirable changes.
The first two questions are to be considered from the optimization, that is the best choice from a number of possible options, the last one is considered from the control part. When you consider the optimization problems, some of the typical problems will be caused:
(1), in the crushing circuit, when you change the sieve, crusher’s discharge mouth, the ore rate and feed size, how does the relationship between the ore and the product size?
(2), in the circuit of rod mill or ball mill, you should change the mining rate or the ore particle size or grading condition, how does the relationship of ore particle size and product size?
(3), in the loops equipped with several milling and grading machines, how does the best process?
(4), to the same production tasks, how do the efficiency of using large-scale equipment rather than using the two small devices?
To make the grinding circuit performance optimize, the reason for using simulation methods rather than empirical method is that it can be faster, cheaper and more accurate to use appropriate mathematical model. Theoretically, the model should include various parameters, but because of the physical phenomena of the process is complicated and therefore it cannot do that.
Only in the simplest process can clarify the process of ore materials into products. Therefore, not yet able to write a process model that includes all physical factors in a comprehensive and exact method and cannot complete the developed model as the initial principles.
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