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Beneficiation process for fine-particle-embedded silicate type iron oxide ore

A technology of iron oxide ore and silicate, applied in the improvement of process efficiency, chemical instruments and methods, magnetic separation, etc., can solve the problems of complex process, low quality of iron ore concentrate, high energy consumption, and promote the growth of aggregation. , Enhance the effect of magnetic separation and reduce the energy consumption of grinding

Inactive Publication Date: 2018-12-14
HUNAN AGRICULTURAL UNIV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] The present invention provides a kind of beneficiation process of fine-grained silicate-type iron oxide ore to solve the problem in the Chinese patent document "a stage grinding-stage separation process for iron-containing high-silicate iron ore (authorized Announcement number: CN103894283A) "The problems of complex process, high energy consumption and low quality of iron ore concentrate in the disclosed mineral processing process

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  • Beneficiation process for fine-particle-embedded silicate type iron oxide ore
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  • Beneficiation process for fine-particle-embedded silicate type iron oxide ore

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Embodiment 1

[0045] A beneficiation process for fine-grained silicate-type iron oxide ore, comprising the following steps:

[0046] S1. Roasting: 100 parts of iron ore samples are dried, crushed and ground to 0.25 mm by weight, mixed evenly with 5 parts of agricultural and forestry residues and 5 parts of sodium sulfate, and placed in a microwave protected by an inert gas atmosphere or an oxygen-deficient atmosphere. Reaction in the reaction device, the heating rate is set to 40°C, the target temperature of roasting is 200°C, the holding time is 30min, and the roasted product is obtained by activation roasting;

[0047] S2. Acid leaching: The roasted product obtained in S1 is cooled naturally in a microwave reaction device under the protection of nitrogen atmosphere, taken out and ground to 0.25mm, and then the solid-to-liquid ratio is 10:1 at 60°C with a concentration of 0.7mol / L sulfuric acid solution was dissolved for 5min to obtain the product after impurity removal;

[0048] S3. Mag...

Embodiment 2

[0051] A beneficiation process for fine-grained silicate-type iron oxide ore, comprising the following steps:

[0052] S1. Roasting: 100 parts of iron ore samples are dried, crushed and ground to 0.25 mm by weight, mixed evenly with 5 parts of agricultural and forestry residues and 5 parts of sodium sulfate, and placed in a microwave protected by an inert gas atmosphere or an oxygen-deficient atmosphere. Reaction in the reaction device, the heating rate is set to 40°C, the target temperature of roasting is 200°C, the holding time is 30min, and the roasted product is obtained by activation roasting;

[0053] S2. Acid leaching: The roasted product obtained in S1 is cooled naturally in a microwave reaction device under the protection of nitrogen atmosphere, taken out and ground to 0.25mm, and then the solid-to-liquid ratio is 10:1 at 60°C with a concentration of 0.7mol / L sulfuric acid solution was stripped for 20min to obtain the product after the impurity removal, the iron grad...

Embodiment 3

[0056] A beneficiation process for fine-grained silicate-type iron oxide ore, comprising the following steps:

[0057] S1. Roasting: 100 parts of iron ore samples are dried, crushed and ground to 0.25 mm by weight, mixed evenly with 5 parts of agricultural and forestry residues and 5 parts of sodium sulfate, and placed in a microwave protected by an inert gas atmosphere or an oxygen-deficient atmosphere. Reaction in the reaction device, the heating rate is set to 40°C, the target temperature of roasting is 200°C, the holding time is 30min, and the roasted product is obtained by activation roasting;

[0058] S2, acid leaching: the roasted product obtained in S1 is cooled naturally in a microwave reaction device under the protection of nitrogen atmosphere, taken out, ground to 0.25mm, and then the concentration is 2.0mol at 60°C according to the solid-to-liquid ratio of 10:1 / L sulfuric acid solution was stripped for 5min to obtain the product after the impurity removal, the iro...

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Abstract

The invention discloses a beneficiation process for fine-particle-embedded silicate type iron oxide ore. According to the beneficiation process, agriculture and forestry residues and sodium sulfate are adopted as activating and roasting additives, microwave is used as a heating heat source, the magnetic property of the iron ore is enhanced efficiently with lowenergy consumption, the micro-particle-embedded silicate type gangue minerals can generate activation in the roasting process and react with the sodium sulfate to generate an acid-soluble substance, and then the coarse separation of the gangue minerals and the iron minerals is realized through an acid dissolving process; and in addition, due to addition of the sodium sulfate in the roasting process, the growth of the iron ore particles can be promoted, the ore grinding process is improved, and the magnetic separation index is strengthened. The process can effectively solve the problems that the iron grade in the fine-grain silicate type iron ore is low, the monomer dissociation is difficult, the roasting energy consumption is high and the like, and the process has the advantages of being simple in technological process, wide in auxiliary raw material source, low in cost, easy to control reaction and the like, and can be used for solving the problems of difficulty in dissociation, poor product quality and the like caused byother silicate micro-particle embedding.

Description

【Technical field】 [0001] The invention belongs to the technical field of mineral processing, and in particular relates to a mineral processing process of fine-grained silicate-type iron oxide ore. 【Background technique】 [0002] Iron ore is the supporting material of the steel industry, which is one of the important raw material industries in my country. With the rapid development of the steel industry, the demand for iron ore resources is increasing. However, compared with the demand for iron ore in the rapidly developing steel industry, although my country's iron ore reserves are relatively abundant, accounting for 12.35% of the world's total reserves, ranking fourth in the world, the general performance is that the iron grade is low and the symbiosis Due to the complex relationship and fine particle size, about 98.57% of the iron ore needs to be processed to a certain extent before it can be used in industry; year-on-year mining has led to the depletion of easy-to-separat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03C1/30C22B1/06C22B3/04
CPCB03C1/30C22B1/06C22B3/04Y02P10/20
Inventor 武芳芳弭宝彬
Owner HUNAN AGRICULTURAL UNIV
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