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A high-voltage electric pulse pretreatment method for strengthening magnetite crushing and sorting

A high-voltage electric pulse and magnetite technology, applied in the field of high-voltage electric pulse pretreatment, strengthening the crushing and sorting of magnetite, can solve the problems of fine embedded particle size, large energy consumption, and many associated components, etc. Achieve the effect of increasing the content of useful minerals, increasing the content of fine particles, and increasing the degree of monomer dissociation

Active Publication Date: 2018-08-28
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At the same time, my country's iron ore resources are mostly lean ore, and the ore deposits are symbiotic and associated components. The iron ore composition is relatively complex and the particle size is fine. Therefore, the beneficiation of my country's iron ore is more difficult, inefficient and cost many more questions
Among them, the most important problems in the field of iron 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 the number of follow-up Don't worry about the difficulty of the homework
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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  • A high-voltage electric pulse pretreatment method for strengthening magnetite crushing and sorting
  • A high-voltage electric pulse pretreatment method for strengthening magnetite crushing and sorting
  • A high-voltage electric pulse pretreatment method for strengthening magnetite crushing and sorting

Examples

Experimental program
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Effect test

Embodiment 1

[0026] 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 SiO2, accounting for 45.77%; the content of harmful impurities S and P is low. The chemical phase analysis of raw ore Fe element is shown in Table 2. From Table 2, it can be seen that 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.

[0027] Table 1 Chemical composition analysis of raw ore / %

[0028]

[0029] Chemical phase analysis results / % of iron element in table 2 ore

[0030]

[0031] Add the magnetite ore of the above composition into the high-voltage electric pulse crushing device, and o...

Embodiment 2

[0038] The ore sample used in this example is taken from the mixed magnetic concentrate of the ore dressing plant of Anqian Mining Industry Co., Ltd., and its main chemical composition is shown in Table 4. It can be seen from Table 4 that the mineral composition of the ore sample is relatively simple. The main iron-containing minerals are magnetite and hematite, while the gangue minerals are mainly quartz, with a TFe grade of 47.70% and a SiO2 content of 33.012%. The content of other minerals with industrial value is very low, and the utilization value is not great.

[0039] Table 4 Analysis of raw ore chemical composition / %

[0040]

[0041] Raw ore TFe grade is the magnetite of 47.70%, adopts the same process and parameter of embodiment 1 to carry out test production, analyze the productive rate of untreated common ore product and the small particle magnetite product that is processed through high-voltage electric pulse ore crushing device , grade, and three indicators o...

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Abstract

The invention discloses a high-voltage electric pulse pretreatment method that enhances the crushing and sorting of magnetite, and belongs to the technical field of mineral processing. This method completely dissociates the target mineral crystals through selective crushing, that is, the minerals are broken into grains to produce more single mineral particles, ensuring that the amount of single dissociated iron minerals in the crushed product can meet the requirements of the subsequent sorting process. requirements to reduce energy consumption in subsequent processing procedures. The high-voltage electric pulse energy is stored and released to the load with extremely high power density in a very short time to complete the high-voltage electric pulse output. It is discharged to the magnet ore through the high-voltage working electrode, so that the magnet ore moves along the magnet minerals and gangue minerals. Particle boundaries, inclusions, and different phases are split apart while maintaining the intact crystal form.

Description

technical field [0001] The invention belongs to the technical field of mineral processing, and in particular relates to a high-voltage electric pulse pretreatment method for strengthening magnetite crushing and sorting, so as to meet the requirements of product crushing and subsequent processes. Background technique [0002] In recent years, my country's iron and steel industry has flourished, and steel production has hit new highs, which has greatly stimulated the demand for iron ore, and the price of iron ore has also hit new highs. At present, the global iron ore supply and demand relationship has changed, and the price of iron ore has fallen sharply, causing almost the entire industry of domestic iron ore to suffer losses. At the same time, my country's iron ore resources are mostly lean ore, with many symbiotic and associated components in the deposit, and the composition of the iron ore is relatively complex and the particle size is fine. Therefore, the beneficiation o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B02C19/18B02C23/16
CPCB02C19/18B02C23/16B02C2019/183B02C2023/165
Inventor 韩跃新高鹏李艳军孙永升袁帅李宏达
Owner NORTHEASTERN UNIV
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