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Some Steps Make You Find the Best Ball Mill

Source:Henan Xingbang Heavy Machinery Co.,Ltd. Date:06/26/2014
Ball mill is the key equipment for grinding after the crushing process, which is widely used in the manufacture industries, such as cement, silicate, new building material, refractory material, fertilizer, ferrous metal, nonferrous metal and glass ceramics and can be used for the dry and wet grinding for all kinds of ores and other grind-able materials. 
1. Grate type Ball Mill 
Due to the existence of grid plate and elevator bucket in fan chamber, grate mill realizes low-level forced discharge. As a result, fine mineral particles can be discharged in time and qualified particles will not stay too long in the mill, which makes less over-crushing phenomena, faster grinding speed , and higher efficiency. 
As the slurry level of the mill is lower and the ores are in smaller quantity, together with the “separation” effect of grating, on the one hand, higher media filling rate can be adopted for increasing ball charge with appropriate amount of small balls; on the other hand, when the ball is lifted to certain height, it has a considerable falling height compared to the lower slurry level. Therefore, the impact effect of media ball is rather strong, which is of excellent crushing and grinding effect. 
2.Over-flow type ball mill 
Over-flow type ball mill discharges because the hollow shaft diameter at discharging side is bigger than that in feeding side, making pulp surface of the mill tilts towards the discharging side. When the position of the pulp is higher than minimum bus of the discharging mouth’s diameter, the pulp will overflow the mill. This is none-forced discharging, so that the discharging speed is low, ores staying long in the mill and media’s effect is unclear. As a result, over-flow type ball mill has serious over-crushing phenomena, and the capacity is lower than the same type grate ball mill. Over - flow type ball mill is suitable for fine grinding or second –period crushing. 
The choice of quantity of ball mill grinding ball,We should find out grinding ball machine according to the test output is larger,While milling power consumption the most hours of the load.At this time of the grinding ball loading capacity, it is the best ball charge for the coal mill.Generally in the ball mill grinding ball filled coefficient between 0.2 ~ 0.35, more appropriate grinding ball with coefficient should be between 0.18 ~ 0.25.

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