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Issue Need Be Considered in Circuit Design of Ball Mill

Posted Nov 29 2012 3:05am

In the design process of the circuit for the rod mill and ball mill, you should carefully consider the following problems.
First, when the size and the yield of the ball mill increase, the infrastructure investment for the final products of the milling machine reduces. The crushing circuit and the milling circuit should be separated when several milling machines are needed. Therefore, the particle size of the products needed must be determined. You must carefully consider the following problems, such as the task distribution of the rod mill and the ball mill, the number of the multiple circuit and the arrange for the processing device in the circuit. Second, when the ball mill is used in the actual operation, the operation rate is about 95%. You should install the machine for installing the rod and tighten the screws. The effective maximum length of the ball mill is about 6 meters. If the length is over 6 meters, the milling machine may be bent, which may cause the rapture of the milling roller. The ration between the length and the diameter should not less than 1.33:1. Otherwise, the milling rod will be tangled. Under normal conditions, the milling rod is worn to an ellipses section and it may be broken at 2.5cm position of the long shaft. When the diameter of the ball mill is very large, the attrition of the milling rod is also a problem. In the milling machine, the input capacity of the milling machine limits the operation of the ball mill. Sometimes, you can also add small amount of the fine particle material into the ball mill. For example, the overflow of the swirler can improve the limitation. Forth, as the coarse milling machine, the rod mill is very effective. The high feeding rate of the rod mil is a very important factor, because the crushing operation is often between 16,000 microns to 40000 microns. Fifth, operating efficiency of the ball mill is high which can be over than 99%. Sixth, when the diameter of the ball mill is over than 5 meters, the power consumption for every ton of the ores should increase when the particle size of the products is constant.

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