High-voltage electric pulse crushing pre-weakening and enriching process for metal ores

A high-voltage electric pulse, metal ore technology, applied in chemical instruments and methods, solid separation, sieves, etc., can solve the problems of low efficiency and high energy consumption, and achieve low energy consumption, stable and reliable operation, and simple process. Effect

Active Publication Date: 2020-05-29
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the deficiencies in the prior art, the present invention provides a high-voltage electric pulse crushing pre-weakening and enrichment process for metal ore, which overcomes the problems of low efficiency and high energy consumption of traditional mechanical crushing methods

Method used

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  • High-voltage electric pulse crushing pre-weakening and enriching process for metal ores
  • High-voltage electric pulse crushing pre-weakening and enriching process for metal ores
  • High-voltage electric pulse crushing pre-weakening and enriching process for metal ores

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Such as figure 1 As shown, the metal ore enters the high-voltage electric pulse device for pre-weakening treatment, and the ore is processed with 1 to 2 pulses at a voltage of 170kv. The weakened ore enters the grinding device for grinding, and the ground material enters the sieve The sub-device (200 mesh) is used for inspection screening, and the materials that do not meet the requirements are returned to the grinding device for re-grinding. The screened material enters the cyclone for classification, the coarse grade enters the grinding equipment for grinding and returns to the cyclone, the fine grade enters the flotation machine for rough separation, and the rough separation concentrate enters the flotation machine for a beneficiation; once The selected concentrate enters the flotation machine for secondary selection, the primary concentrated tailings and the primary scavenging concentrate return to roughing; the secondary concentrated concentrate is concentrated and...

Embodiment 2

[0026] Such as figure 2 As shown, the metal ore enters the high-voltage electric pulse device for preliminary crushing, and the crushed material enters the screening device (13mm) for classification. The voltage of the high-voltage electric pulse device is 150kv, and the number of pulses is gradually increased until the proportion of -13mm material up to 70%. Due to the selectivity of high-pressure pulse crushing, coarse-grained grades can be directly discharged as tailings, and fine-grained grades enter the crusher for further crushing. The crushed ore enters the ore grinding device for grinding, and the ground material enters the screening device for inspection screening, and the material that does not meet the requirements returns to the ore grinding device for re-grinding. The screened material enters the cyclone for classification, the coarse grade enters the grinding equipment for grinding and returns to the cyclone, the fine grade enters the flotation machine for roug...

Embodiment 3

[0028] Such as image 3 As shown, the metal ore enters the high-voltage pulse device for preliminary crushing. The crushing voltage is 150kv, and the number of pulses is gradually increased to more than 95%. The material passes through the lower screen (13mm) of the high-voltage pulse device. The material is well dissociated, and the crushed material enters the gravity separation device for separation, the light product can be directly discharged as tailings, and the heavy product enters the crusher for further crushing. The crushed ore enters the grinding device for grinding, and the ground material enters the screening device (200 mesh) for inspection screening, and the material that does not meet the requirements returns to the grinding device for re-grinding. The screened material enters the cyclone for classification, the coarse grade enters the grinding equipment for grinding and returns to the cyclone, the fine grade enters the flotation machine for rough separation, an...

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Abstract

The invention discloses a high-voltage electric pulse crushing pre-weakening and enriching process for metal ores. The process comprises the steps that firstly, raw ore is pretreated through a high-voltage electric pulse crushing device, and the ore subjected to high-voltage electric pulse crushing is divided into three treatment modes according to needs; for the metal ores with high ore hardness,the crushed materials directly enter a mechanical ore grinding device to be crushed and ground; for the metal ores with concentrated useful mineral distribution, the crushed materials enter a particle size grading device to be divided into tailings and rich ores, tailings are discharged in advance, and rich ores enter the mechanical ore grinding device to be crushed and ground; and for the metalores with uniformly distributed useful minerals, the crushed materials enter a gravity separation device to separate materials into tailings and rich ores, tailings are discharged in advance, and richores enter the mechanical ore grinding device to be crushed and ground. According to the process, the advantages of pre-weakening and pre-enrichment of high-voltage electric pulse crushing are utilized at the same time, so that the hardness of ores entering the mechanical ore grinding device is reduced, meanwhile, the mechanical ore grinding feeding amount is reduced, the ore crushing efficiencyis greatly improved, and the separation energy consumption is reduced; and the device is stable and reliable in operation, good in crushing effect, low in energy consumption, simple in process and wide in practicability.

Description

technical field [0001] The invention belongs to the technical field of mineral processing, and in particular relates to a high-voltage electric pulse crushing pre-weakening and enrichment process for metal ores, which is suitable for crushing and sorting of metal ores. Background technique [0002] Crushing is one of the pretreatment technologies for solid waste. Controlling the size and shape of solid waste through crushing is conducive to the resource utilization and reduction of solid waste. At present, the crushing method of metal ores in my country mainly adopts mechanical crushing methods. Traditional mechanical crushing It has the disadvantages of low crushing efficiency and high energy consumption. At present, improving metal ore crushing efficiency and reducing energy consumption are the key issues faced by metal ore crushing technology. Contents of the invention [0003] In order to overcome the deficiencies in the prior art, the present invention provides a high...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B02C21/00B02C19/18B02C23/16B07B1/46B03B9/00
CPCB02C19/18B02C21/00B02C23/16B02C2019/183B03B9/00B07B1/4609
Inventor 张博赵鹏飞闫光辉段晨龙张真兴朱广庆
Owner CHINA UNIV OF MINING & TECH
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