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A method of using a high-voltage electric pulse crushing device for ore pretreatment

A high-voltage electric pulse and pretreatment technology, which is applied in grain treatment, chemical instruments and methods, and process efficiency improvement, can solve the problems of useful mineral loss, insufficient dissociation of coarse grains, and decline in recovery capacity, and achieve Improve the content of useful minerals, improve the ore sorting index, and improve the effect of monomer dissociation degree

Active Publication Date: 2022-05-20
NORTHEASTERN UNIV LIAONING
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  • Abstract
  • Description
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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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  • A method of using a high-voltage electric pulse crushing device for ore pretreatment
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  • A method of using a high-voltage electric pulse crushing device for ore pretreatment

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Embodiment 1

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

[0028] Table 1 Chemical composition analysis of raw ore / %

[0029]

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

[0031]

[0032] The Dagushan magnetite is crushed with a high-voltage electric pulse discharge crushing device. Feed 500Kg ore with +3...

Embodiment 2

[0042] The ore sample used in this example is taken from the extremely poor hematite ore in the 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 poor hematite ore is iron, and the TFe grade is 19.34%, which belongs to the extremely poor hematite ore. The grade of FeO is 0.68%, which shows 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 content are 0.17% and 0.28%, respectively, and other elements are low.

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

[0044]

[0045] In the laboratory, the extremely poor hematite ore is crushed with a high-voltage electric pulse discharge crushing device. Feed 500Kg of ore with a particle size of +20mm and a content of 85% into a cylinder of high-voltage electric pulse equipment, discharg...

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Abstract

The invention discloses a high-voltage electric pulse crushing device and method for ore pretreatment, and belongs to the technical field of ore crushing pretreatment in mineral processing. Its device mainly includes power supply, single-phase voltage regulator, AC ignition transformer, six times voltage rectifier circuit, ultra-high voltage ceramic capacitor, gas switch, high voltage electrode, conductive cylinder, discharge crushing bucket, vibrating screen, insulating liquid, solid Liquid separator and product collector, etc., the above units are fixedly connected by wires and other auxiliary devices to form a complete equipment system. The useful metal minerals and gangue non-metallic mineral components in the ore have different electrical conductivity, and after being treated by this device, they can be selectively dissociated and broken, and cracks and cracks will be generated on the mineral interface inside the ore, thereby improving the mineral cleavage characteristics , reduce the energy consumption of subsequent processing, avoid over-grinding of useful minerals, and improve the separation index.

Description

technical field [0001] The invention belongs to the technical field of ore crushing pretreatment in mineral processing engineering, and in particular relates to a method for using a high-voltage electric pulse crushing device for ore pretreatment. Background technique [0002] Most of my country's mineral resources are lean ore, and the ore deposits have many symbiotic and associated components, and the ore composition is relatively complex and the embedded particle size is fine. Therefore, the beneficiation of ore 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. [0003] The current crushing meth...

Claims

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Application Information

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Patent Type & Authority Patents(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 LIAONING
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