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Grading method of ore ball mill

A ball mill and grading technology, which is applied in the field of mining equipment, can solve the problems that the comprehensive grinding efficiency is difficult to meet expectations, the grinding ball gradation is difficult to achieve balance, and the grinding efficiency is high, so as to improve the comprehensive grinding efficiency and avoid insufficient production capacity. The effect of improving the average and comprehensive production efficiency

Inactive Publication Date: 2021-06-11
栾川县金鼎矿业有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the problem brought about by this is that it is difficult to achieve a balance in the gradation of grinding balls in each warehouse. The warehouse with a suitable gradation has high grinding efficiency and no material storage; the warehouse with poor gradation has low grinding efficiency and more material storage. , easy to "bloat"
Therefore, the comprehensive grinding efficiency is difficult to meet expectations
[0005] At present, there are many grading methods for grinding balls, but there are no papers or patents aimed at improving the impact probability of grinding balls and increasing the contact surface between grinding balls and liners, and there is no overall convex surface of grinding balls and liners. The ratio of the area to the concave surface area is used as the grading method based on the grading, so that the grading quantity of each grinding ball can be guided scientifically and systematically, and the comprehensive grinding efficiency of the ball mill can be improved to the greatest extent.

Method used

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  • Grading method of ore ball mill
  • Grading method of ore ball mill
  • Grading method of ore ball mill

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] The utility model relates to a ball mill, the drum of which is a through chamber without a partition chamber. A liner 1 is laid on the inner wall of the drum, and two kinds of grinding balls are filled in the drum, the two kinds of grinding balls are ellipsoid 3 and concave ellipsoid 2 respectively.

[0049] Such as figure 1As shown, an axial corrugated structure undulating along the axial direction is provided on the working surface of the liner 1, and the corrugated lines 1.1 of the axial corrugated structure are formed by smoothly connecting crest lines and trough lines, wherein the crest lines and trough lines are both is an elliptical arc. In this embodiment, the axial corrugated structure includes two peak lines and two valley lines, the length of the valley lines is 155 mm, the length of the peak lines is 45 mm, and the length of the wave amplitude is 27 mm. The trough surface of the axial corrugated structure constitutes the circumferential raceway of the gri...

Embodiment 2

[0083] The difference from Example 1 is that according to the distribution of ore particle size, there are three groups of particle size intervals with relatively large proportions, which are 4-6mm, 8-10mm and 1-2mm respectively, among which, the particle size interval of 4-6mm and the particle size interval of 8-10mm The proportion is the largest, and the proportion of the 4-6mm granularity interval is twice that of the 1-2mm granularity interval. The convex area of ​​the working surface of the liner of the ball mill accounts for 20% of the total surface area, and the concave area accounts for 80% of the total surface area.

[0084] The grading method comprises the following steps:

[0085] S1: According to the above three groups of ore feeding granularity, select ellipsoids and concave ellipsoids with suitable single weight. Among them, the large ellipsoid corresponds to the particle size range of 4-6mm, the major axis of the large ellipsoid is 10 cm, and the minor axis is 6...

Embodiment 3

[0101] The difference from Example 2 is that according to the distribution of ore particle size, there are four groups of particle size intervals with relatively large proportions, which are 4-6mm, 8-10mm, 2-4mm and 1-2mm respectively. Among them, the 4-6mm particle size interval, The proportion of the 8-10mm granularity interval is the largest, the proportion of the 4-6mm granularity interval is twice that of the 1-2mm granularity interval, and the proportion of the 8-10mm granularity interval is 2 times that of the 2-4mm granularity interval. times.

[0102] The grading method comprises the following steps:

[0103] S1: According to the above four groups of ore feeding granularity, select ellipsoids and concave ellipsoids suitable for single weight. Among them, the large ellipsoid corresponds to the particle size range of 4-6mm, the major axis of the large ellipsoid is 10 cm, and the minor axis is 6 cm. Its convex surface area is 1.66 square decimeters and its weight is 1.4...

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Abstract

The invention relates to a grading method of an ore ball mill. The purposes of improving the collision probability of grinding balls and increasing the contact surface of the grinding balls and a lining plate are achieved. The proportion of the total convex surface area and concave surface area of the grinding balls and the lining plate is used as a grading basis, the proportion number of each grinding ball can be accurately calculated by solving an equation set, the total convex surface area and the total concave surface area of the lining plate and the grinding ball participating in ore grinding work are approximately equal, and the probability of convex-concave matching collision between the lining plate and the grinding balls is improved to the greatest extent, so that the comprehensive ore grinding efficiency of the ball mill is greatly improved. The grading method of the ore ball mill is suitable for grading of two-stage grinding balls, and is suitable for grading of multi-stage grinding balls. Besides, the crushing performance and the grinding performance of the ball mill are balanced, the ball mill does not need to be provided with a multi-bin structure, a through bin structure with a simple structure is adopted, so that the swelling caused by non-uniform capacity of each bin is avoided, the grading of the grinding balls is more reasonable, and the operation is easier.

Description

technical field [0001] The invention relates to the technical field of mining equipment, in particular to a grading method for an ore ball mill. Background technique [0002] Ball mill is an important equipment in beneficiation operation. Grinding ball and liner are important grinding parts in ball mill. Their performance will directly determine the quality and efficiency of grinding. Grinding balls can be divided into round balls, round rods and elliptical balls according to their shapes. At present, most ball mills use round balls, which are easy to manufacture and have universal properties, which can strike ore at any angle. The single-point impact force of the large-diameter ball is large, and it is mainly used for crushing ore, while the small-diameter ball is mainly used for grinding, so the size of the ball is usually used in grades. But in actual production, the comprehensive grinding efficiency of the ball is not high. The reason is that under the same volume, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B02C17/10B02C17/22
CPCB02C17/10B02C17/22
Inventor 王二军况锅明郭雷强
Owner 栾川县金鼎矿业有限公司
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