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High-voltage electric pulse ore crushing device and method for ore pre-treatment

A high-voltage electric pulse and pretreatment technology, which is applied in grain treatment, improvement of process efficiency, chemical instruments and methods, etc., can solve the problems of loss of useful minerals, insufficient dissociation of coarse grains, high cost, etc., to improve the usefulness Mineral content, increase monomer dissociation degree, and the effect of saving enterprise cost

Active Publication Date: 2017-06-13
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the beneficiation of ores in my country is facing many problems such as greater difficulty, low efficiency and high cost.
Among them, the most important problems in the field of ore crushing are: high investment and maintenance costs for crushing and grinding equipment, high energy consumption, excessive fine-grained grades that cannot be processed and insufficiently dissociated coarse-grained grades, increasing subsequent sorting operations difficulty
Mechanical crushing is to dissociate useful minerals from gangue minerals by reducing the particle size of the ore. For ores that are tightly combined with useful minerals and gangue minerals, mechanical crushing is prone to overgrinding of useful minerals during the crushing process. The recovery ability of useful minerals decreases with the reduction of particle size, so that some useful minerals are lost and cannot be recovered effectively

Method used

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  • High-voltage electric pulse ore crushing device and method for ore pre-treatment

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Experimental program
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Effect test

Embodiment 1

[0027] The ore sample used in this example is Dagushan magnetite, and its main chemical composition is shown in Table 1. It can be seen from Table 1 that the valuable element in the raw ore is iron, the TFe grade is 32.61%, and the FeO content is 17.49%; the main impurity is SiO 2, accounting for 45.77%; the content of harmful impurities S and P is low. The chemical phase analysis of the Fe element in the raw ore is shown in Table 2. It can be seen from Table 2 that the iron in the ore mainly exists in the form of magnetite, and the iron occupancy rate in the magnetite reaches 79.70%, followed by siderite, red (limonite) iron ore It exists in the form of iron silicate and iron sulfide, and a small amount exists in the form of iron sulfide.

[0028] Table 1 Analysis of chemical composition of raw ore / %

[0029]

[0030] Table 2 Chemical phase analysis results of iron in ore / %

[0031]

[0032] The Dagushan magnetite is crushed with a high-voltage electric pulse dischar...

Embodiment 2

[0042] The ore sample used in this example was taken from the extremely lean hematite ore in the ore dressing plant of Anqian Mining Co., Ltd., and its main chemical composition is shown in Table 5. It can be seen from Table 5 that the main metal element in the extremely lean hematite ore is iron, and the TFe grade is 19.34%, which belongs to the extremely lean hematite ore. Among them, the FeO grade is 0.68%, and it can be seen that the content of magnetite in the ore is less. SiO 2 The highest content is 75.18%, indicating that the main gangue mineral is silica. Second Al 2 O 3 and MgO contents were 0.17% and 0.28%, respectively, and the contents of other elements were lower.

[0043] Table 5 Analysis of chemical composition of raw ore / %

[0044]

[0045] The extremely lean hematite ore is crushed in the laboratory with a high-voltage electric pulse discharge crushing device. The 500Kg ore with a particle size of +20mm and a content of 85% is fed into a high-voltage...

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Abstract

The invention discloses a high-voltage electric pulse ore crushing device and a method for ore pre-treatment and belongs to the technical field of ore crushing pre-treatment in mineral processing. The device mainly comprises a power supply, a single-phase voltage regulator, an alternating-current ignition transformer, a six-time-voltage rectification circuit, an ultrahigh-voltage ceramic capacitor, a gas switch, a high-voltage electrode, a conductive barrel body, a discharging and ore crushing bucket, a vibration screen mesh, insulating liquid, a solid-liquid separator, a product collector and the like; all the units are fixedly connected through a lead wire and other auxiliary devices to form a complete equipment system. The ores are treated and then are selectively dissociated and crushed according to different conductive properties of useful metal minerals and non-metal mineral components of gangues, and extension cracks and fissures are generated on mineral interfaces on the ores, so that physical properties of the minerals are improved and subsequent treatment energy consumption is reduced; meanwhile, useful minerals are prevented from excessive abrasion and separation indexes are improved.

Description

technical field [0001] The invention belongs to the technical field of ore crushing and preprocessing of mineral processing engineering, and particularly relates to a high-voltage electric pulse crushing device and method for ore preprocessing. Background technique [0002] Most of the mineral resources in my country are lean ore, with many symbiotic and associated components in the ore deposit. The ore composition is relatively complex and the embedded particle size is fine. Therefore, the beneficiation of ore in my country faces many problems such as greater difficulty, low efficiency and high cost. Among them, the most important problems in the field of ore crushing are: high investment and maintenance costs for crushing and grinding equipment, high energy consumption, excessive production of unprocessable fine-grained grades and insufficiently dissociated coarse-grained grades, increasing subsequent sorting operations difficulty. [0003] The crushing method currently ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B02C19/18B02C23/14B02C23/10B02C23/16B07B1/28
CPCB02C19/18B02C23/10B02C23/14B02C23/16B07B1/28B02C2023/165B02C2019/183Y02P10/20
Inventor 韩跃新高鹏袁帅李艳军李宏达孙永升
Owner NORTHEASTERN UNIV
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