2012年3月4日星期日

Ball Bearing to the Influence of Ball Mill

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.
When choosing the steel ball of a ball mill, there are two problems often be ignored: the ball is not the harder the better, but is best with its proper hardness; the ball density is also a problem not to be ignored. But the productivity of a ball mill increases with the ball hardness in a certain range, but once the hardness exceed the certain range, the productivity of the ball mill will decrease.
The density of the steel ball is affected by three factors:
1. The influence of material quality, such as steel, cast iron, alloy steel and other materials, different materials are of different densities, the density of steel is larger than cast iron, the density of alloy steel is changing with the different content of the alloy steel.
2.The influence of steel ball crystal structure, such as martensitic, Austenitic, bainite, ferrite and so on. Different crystal structure is with different density, which also have influence on crystal fineness.
3. The manufacturing method of the steel ball, the structure of steel ball rolled and forged steel ball is compact and with large density, as with the cast steel ball, cast iron ball or cast alloy ball whose structure is not very dense or even including porosity, with a smaller density.
Reasons that a too high ball hardness will go against the ore grinding:
The ball rebound bounce is serious, which result in partial energy loss, so energy can not be used in grinding, therefore the influence the efficiency of the ball mill;When the hardness of the steel ball is high, contact between the balls is seriously slide, which cannot be effectively engaged the mineral particles between the balls, make the particle grinding effect weakened.
This Ball mill,a horizontal type and tubular running device, has two warehouses. The ball mill is a grid type .The material enters spirally and evenly the first warehouse of the milling machine along the input material hollow axis by input material device. In this warehouse , there is a ladder scaleboard or ripple scaleboard, and different specification steel balls are installed on the scaleboard, when the barrel body rotates and then produces centrifugal force ,at this time , the steel ball is carried to some height and falls down to make the material heavy striked and grinded . After being grinded coarsely in the first warehouse, the material then enters the second warehouse for regrinding with the steel ball and scaleboard. In the end, the powder is discharged by output material board and the final products are completed.
As the professional manufacturer of complete sets of mining machinery, such as Rotary kiln, Henan Hongxing is always doing the best in products and service.

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