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A Grinding Method Considering Ores with Different Hardnesses

A technology of ore grinding and ore, which is applied in the direction of chemical instruments and methods, wet separation, solid separation, etc., can solve the problems of difficult grinding, large difference in ore composition, and many garnet-containing components, so as to ensure mineral processing Technical indicators, prolonging the deterioration time, and improving the effect of grinding efficiency

Active Publication Date: 2021-11-05
NORTHWEST RES INST OF MINING & METALLURGY INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main reason is: the ore composition of the first single copper ore and copper-molybdenum ore is quite different, and the single copper ore contains more garnet components, which makes it difficult to grind the ore, resulting in the grinding fineness of the two ores being different in a sorting system. It is difficult to control; the second two kinds of ore grinding with different properties have great differences in the filling rate of the ball mill medium and the ratio of steel balls, so the control of the grinding medium is more complicated; The amount of sand returned is different, so how to take into account the different processing volumes of the hydrocyclone feed pump is also a difficult point in the design

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Single-copper ore ball mill efficiency: 160 tons / hour (dry weight), steel balls with ball diameters of 100mm, 80mm, and 50mm in the first-stage ball mill are filled at a ratio of 5:3:2, and the steel ball filling rate is 48%. The ball mill is supplemented with 58 tons of post water per hour to maintain the grinding concentration of the ball mill at 72%. The sand return ratio of the first-stage cyclone is controlled at about 250, and a 60mm sand settling nozzle is used. Ensure that the first-stage cyclone overflow fineness reaches 38%-200 mesh, and the first-stage cyclone uses a 209mm diameter pipeline for the mine pipe. The steel ball diameters of the second-stage ball mill are 80mm, 60mm, and 40mm respectively, and the filling ratio is 4:4:2. The filling rate of steel balls is 50%. The fineness reaches 72%-200 mesh good indicators.

Embodiment 2

[0028] Single-copper ore ball mill table efficiency: 155 tons / hour (dry weight), steel balls with ball diameters of 100mm, 80mm, and 50mm in the first-stage ball mill are filled at a ratio of 5:3:2, and the steel ball filling rate is 48%. The ball mill is supplemented with 54 tons of post water per hour to keep the grinding concentration of the ball mill at 70%. The sand return ratio of the first-stage cyclone is controlled at about 200, and a 65mm sand settling nozzle is used. Ensure that the first-stage cyclone overflow fineness reaches 38%-200 mesh, and the first-stage cyclone uses a 209mm diameter pipeline for the mine pipe. The steel ball diameters of the second-stage ball mill are 80mm, 60mm, and 40mm respectively, and the filling ratio is 4:4:2. The steel ball filling rate is 50%, and the sand return ratio of the second-stage cyclone is controlled at about 230, achieving flotation The selected fineness reaches a good index of 74%-200 mesh.

Embodiment 3

[0030] The efficiency of the ball mill for processing copper-molybdenum ore: 180 tons / hour (dry weight), the steel ball diameters of the first-stage ball mill are 100mm, 80mm, and 50mm, and the filling ratio is 4:4:2, and the steel ball filling rate is 45%. The ball mill is supplemented with 65 tons of post water per hour to keep the grinding concentration of the ball mill at 78%. The sand return ratio of the first-stage cyclone is controlled at about 125, and a 70mm sand sinking nozzle is used. Ensure that the overflow fineness of the first-stage cyclone reaches 42%-200 mesh, and the first-stage cyclone uses a 279mm diameter pipeline for the mine pipe. The steel ball diameters of the second-stage ball mill are 80mm, 60mm, and 40mm respectively, and the filling ratio is 4:4:2. The filling rate of the steel balls is 50%, and the sand return ratio of the second-stage cyclone is controlled at about 350. The selected fineness reaches a good index of 75%-200 mesh.

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Abstract

A grinding method for ores with different hardnesses, which belongs to the field of mineral processing engineering. In a set of grinding system, the grinding operation of ores with different hardnesses is carried out. By adjusting the grinding medium conditions of the ball mill, the sand return ratio of the hydrocyclone, The grinding concentration of the ball mill and the grinding time of the ball mill make various ores reach the same grinding fineness. The grinding medium conditions of the ball mill are the diameter ratio of the grinding medium and the filling rate of the grinding medium. It can ensure that the ore discharge fineness of the ball mill is basically the same, and the beneficiation technical indicators of ores with different hardness are guaranteed.

Description

technical field [0001] The invention belongs to the field of mineral processing engineering, and specifically relates to a grinding method and application of ores with different hardnesses. Background technique [0002] Due to geological structure problems in a mine in Xinjiang, a variety of ores of different properties are produced by mining. The differences in the ores are mainly reflected in: 1. The metals that are beneficial to the value of the ores are different, which are roughly divided into single copper ore, single molybdenum ore and copper molybdenum. 2. Different types of gangue, roughly divided into three types: pomegranate, epidote and andesite, and the content of the above three gangues of different ores is quite different; 3. The hardness of the ore is different, and the single copper ore Mohs The hardness is nearly twice as high as the Mohs hardness of single molybdenum ore. How to take into account the ore with such complex properties in the same grinding p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B02C17/10B02C17/20B03B5/34
CPCB02C17/10B02C17/20B02C17/205B03B5/34
Inventor 赵天岩苗梁胡延明包玺琳罗刚王婷霞王小强王军如马应平
Owner NORTHWEST RES INST OF MINING & METALLURGY INST
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