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Method for improving ore grinding efficiency through electric pulse ore pretreatment

A pretreatment and electric pulse technology, applied in the field of mineral processing, can solve the problems such as the decline of the recovery ability of the target minerals by the sorting method, and achieve the effects of improving the degree of monomer dissociation, saving enterprise costs, and reducing energy consumption

Active Publication Date: 2017-07-14
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

With the reduction of the particle size of ore mechanical grinding, the amount of target minerals dissociated from the monomer is increasing, but the recovery ability of the separation method for the target minerals decreases with the reduction of the dissociated particle size.

Method used

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  • Method for improving ore grinding efficiency through electric pulse ore pretreatment
  • Method for improving ore grinding efficiency through electric pulse ore pretreatment
  • Method for improving ore grinding efficiency through electric pulse ore pretreatment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024]The ore sample used in this example is the raw ore of an iron ore factory in Liaoning, and its main chemical composition is shown in Table 1. It can be seen from Table 1 that the magnetite-poor ore of this mine has the common characteristics of Anshan-type sedimentary metamorphic iron-poor quartzite, that is, the chemical composition is simple, high in silicon, poor in iron, low in calcium, magnesium, and aluminum, and the harmful impurities sulfur and phosphorus are lower than industrial Allowed acidic ore, ore TFe grade is low. The chemical phase analysis of raw ore Fe element is shown in Table 2. As can be seen from Table 2, the content of magnetite in the ore accounts for 77.94% of the total iron, and the content of iron silicate is higher, followed by red (brown) iron ore and iron carbonate. form exists.

[0025] Table 1 Chemical composition analysis of raw ore / %

[0026]

[0027] Chemical phase analysis results / % of iron element in table 2 ore

[0028]

[...

Embodiment 2

[0034] The ore sample used in this embodiment is taken from the raw ore of a certain copper mine in Yunnan. Its main chemical composition is shown in Table 4, its phase analysis is shown in Table 5, and the chemical phase analysis results of copper in the ore are shown in Table 6. , as can be seen from Table 6, the copper in the ore mainly exists in bornite, chalcopyrite, and copper blue of copper sulfide in the form of independent minerals, accounting for about 44.00% of the total copper; copper exists in the red copper oxide as independent minerals. Copper ore and malachite account for about 41.82% of the total copper. Another part of copper exists in gangue minerals and chrysocolla in the form of isomorphism (that is, combined with copper oxide), accounting for about 14.18% of the total copper.

[0035] Table 4 Raw ore chemical analysis results / %

[0036]

[0037] Table 5 Raw ore copper phase analysis results / %

[0038]

[0039] Chemical phase analysis results / % of ...

Embodiment 3

[0046] The ore sample used in this embodiment is taken from a certain lead-zinc oxide ore dressing plant in Yunnan. The metal minerals in the ore are mainly lead and zinc. The raw ore chemical multi-element analysis is as shown in Table 8, and the raw ore lead phase analysis is as shown in Table 9. The phase analysis of raw ore zinc is shown in Table 10. The chemical multi-element analysis and phase analysis of the raw ore show that the raw ore is lead-zinc oxide ore, and the main elements with recovery value are lead and zinc, and the oxidation rate of lead is 51.39%. Zinc oxidation rate is 39.45%. As far as the current level of mineral processing technology is concerned, the recyclable zinc oxide mineral is only zinc carbonate (ie smithsonite), the grade of raw ore zinc is low and the distribution rate of smithsonite is only 20.18%. The zinc oxide minerals in the mine do not have comprehensive recovery value. Therefore, the target minerals recovered by ore dressing are main...

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Abstract

The invention discloses a method for improving ore grinding efficiency through electric pulse ore pretreatment, and belongs to the technical field of mineral processing. According to the method, high-voltage electric pulse crushing pretreatment is achieved through dielectric property differences of different minerals in ore, high-voltage pulse outputs energy with the extremely high power density, electricity is discharged to ore through a high-voltage electrode, multiple microcracks are formed on the interfaces between gangue minerals and useful minerals in ore, accordingly, the strength of ore is lowered, the dissociation characteristic is improved, the ore grinding efficiency can be improved, energy consumption can be reduced, and separation indexes can be modified and improved.

Description

technical field [0001] The invention belongs to the technical field of mineral processing, and in particular relates to a method for improving ore grinding efficiency by using electric pulses to pretreat ore, so as to reduce the energy consumption of subsequent ore grinding operations. Background technique [0002] China has a lot of metal ore reserves, but most of them are low-grade refractory ores, such as iron ore, copper ore, lead-zinc ore and molybdenum ore, which brings more difficulties to the development and utilization of mining industry. As far as the production of metal mines is concerned, the investment in crushing and grinding equipment will account for 65% to 70% of the total cost of the plant, the power consumption will be about 50% to 65%, and the steel consumption will be as high as 50%. Therefore, how to improve crushing and grinding The performance of operating equipment, research and development of high-efficiency and energy-saving equipment, obtaining mo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B02C19/18B02C23/16B02C23/14B02C23/06
CPCB02C19/18B02C23/06B02C23/14B02C23/16B02C2019/183
Inventor 韩跃新高鹏李艳军孙永升袁帅李宏达
Owner NORTHEASTERN UNIV
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