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Method for raising milling efficiency of ball mill and ball milling unit

A ball mill and efficiency technology, applied in the field of powder processing, can solve the problems of low working efficiency of the mill, insufficient grinding capacity, difficult to change or eliminate the immovable layer, etc., to improve the grinding effect, reduce the load, The effect of reducing energy consumption

Inactive Publication Date: 2007-11-07
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since these immobile layers only move laterally around the axis but not longitudinally along the axis, it is difficult for traditional ball mills to change or eliminate this immobile layer
As a result, the working efficiency of the mill is very low, and the effective utilization rate of electric energy is only about 2%, and its grinding ability cannot be fully utilized.

Method used

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  • Method for raising milling efficiency of ball mill and ball milling unit
  • Method for raising milling efficiency of ball mill and ball milling unit
  • Method for raising milling efficiency of ball mill and ball milling unit

Examples

Experimental program
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Effect test

Embodiment 1

[0022] Adopt a ball mill with an outer cylinder diameter of 1.2 meters, an inner cylinder with a built-in diameter of 0.4 meters, and a length of 4 meters. Adjust the speed of the ball mill to 40%, and the filling rate to 80%. Other parameters are the same as those of the traditional ball mill. grind. Compared with the traditional ball mill with a cylinder diameter of 1.2 meters and a length of 4 meters without a built-in small cylinder, the content of products less than 3 μm increases by 21.7% and the load power is 2.1% lower than that of the same rotation rate and filling rate.

[0023] From the result of above-mentioned embodiment, make fine powder content increase a lot, increase more than 20%, and ball mill load power variation value is within 5%, thinks basically unchanged. Therefore, compared with the prior art, the method breaks through the traditional concept and produces remarkable effects.

[0024] Figure 1 shows a schematic longitudinal section of a continuous dou...

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Abstract

The ball milling unit has one increased small inner cylinder coaxial with the outer cylinder, grinding medium filled in the space between the inner cylinder and the outer cylinder and cooling medium introduced into the inner cylinder to cool the milling unit. The present invention isolates the ineffective grinding space in the central part, alters the motion regulation of grinding medium balls, reduces or eliminates the immobile layer of medium balls and makes more medium balls in moving grinding state, so as to raise the grinding efficiency, reduce power consumption and raise grinding quality.

Description

technical field [0001] The invention belongs to the technical field of powder processing, and in particular relates to a method for changing the motion law of ball mill grinding medium balls, reducing the effect of impact throwing, and improving the efficiency of the ultrafine grinding process and a ball milling device thereof. Background technique [0002] In the field of deep processing technology of modern industrial minerals and other raw materials, ball mill is a common and important equipment; it is widely used in the grinding process of ordinary fineness in mining, metallurgy, chemical industry, construction and electric power industries; it has simple structure, High operating rate and other advantages; but in production, the centrifugal force generated by each medium ball in the ball mill is not the same, the movement is very complicated, not all grinding bodies have ideal movement, and exert the maximum energy to do work. The grinding body and the material on one s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B02C17/18B02C17/00
Inventor 盖国胜吴绍军
Owner TSINGHUA UNIV