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Additive for strengthening calcification and roasting of magnetite-type tin-iron tailings and method for separating tin-iron by calcification and roasting of tin-iron tailings

A technology of calcification roasting and magnetite, which is applied in the field of strengthening magnetite-type tin-iron tailings calcification roasting additives, tin-iron tailings roasting additives, and strengthening magnetite-type tin-iron tailings calcification roasting to separate tin and iron. Solve the problems of complex treatment process, difficulty in separation of tin and iron, difficulty in utilization, etc., achieve enhanced roasting effect, low cost, and realize the effect of industrialized production

Active Publication Date: 2019-01-22
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the defects in the prior art that the magnetite-type tin-iron ore has complex processing technology, it is difficult to realize the separation of tin and iron, and it is difficult to use, one purpose of the present invention is to provide a method for strengthening the magnetite-type tin-iron tailings Calcification and roasting to convert iron into magnetic iron ore, while tin is fixed with non-magnetic tailings to achieve efficient separation of tin and iron additives

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Using magnetite-type tin-containing iron tailings with a tin grade of 0.32% and an iron grade of 34.52% as raw materials, after the tin-iron tailings raw materials are dehydrated and dried to a certain moisture content, additives are added according to 25% of the mass fraction (the ratio is Quicklime: dolomite: carbonate type iron-containing tailings: sodium humate = 60%: 10%: 20%: 10%), after mixing the materials evenly, add suitable water to form agglomerates, and finally carry out dehydration and drying; The final agglomerate is put into the roaster, and the volume concentration of CO [CO / (CO+CO 2 )] is 16%, the magnetization roasting temperature is 700°C, and the roasting time is 120min. After the roasting is completed, the agglomerate is cooled with water, ground to 80% less than 0.074mm, and magnetically separated under the condition of a magnetic field strength of 800GS. An iron concentrate with an iron grade of 62.56% (tin grade 0.05%) was obtained, the iron rec...

Embodiment 2

[0039] Using magnetite-type tin-containing iron tailings with a tin grade of 0.32% and an iron grade of 34.52% as raw materials, after the tin-iron tailings raw materials are dehydrated and dried to a certain moisture content, additives are added according to 10% of the mass fraction (the ratio is Quicklime: dolomite: carbonate type iron-containing tailings: sodium humate = 40%: 10%: 40%: 10%), after mixing the materials evenly, add suitable water to form agglomerates, and finally carry out dehydration and drying; The final agglomerate is put into the roaster, and the volume concentration of CO [CO / (CO+CO 2 )] is 3%, the magnetization roasting temperature is 900°C, and the magnetization roasting time is 60min. After the roasting is completed, the agglomerate is cooled with water, ground to 80% less than 0.074mm, and magnetically separated under the condition of a magnetic field strength of 1200GS. An iron concentrate with an iron grade of 61.31% (tin grade 0.06%) was obtained,...

Embodiment 3

[0041] Using magnetite-type tin-containing iron tailings with a tin grade of 0.45% and an iron grade of 45.12% as raw materials, after the tin-iron tailings raw materials are dehydrated and dried to a certain moisture content, additives are added according to 12% of the mass fraction (the ratio is Quicklime: dolomite: carbonate type iron-containing tailings: sodium humate = 40%: 19%: 40%: 1%), after mixing the materials evenly, add suitable water to form agglomerates, and finally carry out dehydration and drying; The final agglomerate is put into the roaster, and the volume concentration of CO [CO / (CO+CO 2 )] is 5%, the magnetization roasting temperature is 700°C, and the magnetization roasting time is 90min. After the roasting is completed, the agglomerate is cooled with water, ground to 80% less than 0.074mm, and magnetically separated under the condition of a magnetic field strength of 1000GS. An iron concentrate with an iron grade of 65.33% (tin grade 0.07%) was obtained, ...

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Abstract

The invention discloses an additive for intensifying magnetite type tin and iron tailing calcium roasting and a method for separating tin and iron through tin and iron tailing calcium roasting. The additive comprises limestone, dolomite, carbonate type iron-containing tailings, sodium humate and other main components. When the additive is used for intensifying magnetite type tin and iron tailing calcium roasting, iron can be converted to be vignite, tin is fixed as nonmagnetic tailings, efficient separation of tin and iron is achieved, and magnetite concentrate and tin-rich tailings with the tin content lower than 0.08% can be obtained.

Description

technical field [0001] The invention relates to a roasting additive for tin-iron tailings, in particular to an additive for strengthening the calcification roasting of magnetite-type tin-iron tailings, and the roasting additive is used to strengthen the calcification roasting of magnetite-type tin-iron tailings to separate tin-iron The method belongs to the fields of mineral processing and nonferrous metallurgy. Background technique [0002] Tin-bearing magnetite is a typical refractory and complex resource in my country. It is widely distributed in Huanggang in Inner Mongolia, Dading in Guangdong, Malipo in Yunnan, and Tongshan in Zhejiang. The total reserves exceed 200 million tons, of which tin and iron are Valence elements have extremely high comprehensive utilization value. However, due to the fine particle size of tin and iron minerals, the symbiosis and associated conditions of gangue minerals are complicated, the conventional combined mineral processing process of gr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B1/02C22B1/24
CPCC22B1/02C22B1/24
Inventor 张元波苏子键姜涛李光辉彭志伟黄柱成范晓慧陈迎明韩本来饶明军徐斌刘兵兵路漫漫刘继成欧阳学臻王娟
Owner CENT SOUTH UNIV
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