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Method used for high efficient separation and enrichment of tin from nickel-tin-iron alloy waste material

A technology for separation and enrichment of ferroalloy, applied in the field of high-efficiency separation and enrichment of tin from nickel-tin-iron alloy waste, it can solve the problems of complex operation, equipment corrosion, environmental pollution, etc., and achieve the effect of simple operation, short process and high quality

Inactive Publication Date: 2014-01-29
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the treatment of nickel-tin-iron alloy is mainly ferrosilicon reduction replacement method. Although this method can effectively remove tin, the operation is complicated and the amount of slag is large, and the impurity element silicon is introduced into the remaining nickel-iron alloy, and the process defects are obvious.
In addition, the enrichment of tin in complex metal materials mainly adopts the chlorination volatilization method. The basic idea is to fume and volatilize all the target elements in the material in the form of their chlorides, and then process the dust step by step to achieve the separation of solid materials. and the enrichment and recovery of valuable metals, but the chlorinated gas produced in this process corrodes the equipment seriously and causes environmental pollution

Method used

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  • Method used for high efficient separation and enrichment of tin from nickel-tin-iron alloy waste material

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Experimental program
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Effect test

Embodiment 1

[0017] Put nickel-tin-iron alloy waste (its main chemical composition is (unit: mass fraction): Fe=30, Sn=15, Ni=55) in an electric furnace, heat up to 1550°C, and the waste begins to mix and melt; after the waste is fully melted , under an inert gas atmosphere with a pressure of 0.1MPa, the pyrite is blown into the molten pool according to 10% of the mass of the nickel-tin-iron alloy waste through the spray gun, and the sulfidation and detinning reaction is carried out. The high-temperature flue gas generated during the process is recovered after being cooled. Contains tin fume.

[0018] After dust collection, it is discharged into the atmosphere. After analysis and detection, the tin content in the obtained nickel-iron alloy was reduced to 1.8%, and the tin recovery rate reached 88.00%.

Embodiment 2

[0020] Put nickel-tin-iron alloy waste (its main chemical composition is (unit: mass fraction): Fe=35, Sn=18, Ni=47) in an electric furnace, heat up to 1570°C, and the waste begins to mix and melt; after the waste is fully melted , under an inert gas atmosphere with a pressure of 1MPa, pyrite and sulfur are blown into the molten pool through a spray gun according to 20% of the mass of nickel-tin-iron alloy waste, to carry out sulfidation and detinning reaction, and the high-temperature flue gas generated during the process is cooled. Recycling which contains tin fumes.

[0021] After dust collection, it is discharged into the atmosphere. After analysis and detection, the tin content in the obtained nickel-iron alloy was reduced to 1.1%, and the tin recovery rate reached 92.67%.

Embodiment 3

[0023] Put nickel-tin-iron alloy waste (its main chemical composition is (unit: mass fraction): Fe=30, Sn=15, Ni=55) in an intermediate frequency furnace, raise the temperature to 1650°C, and the waste begins to mix and melt; wait until the waste is fully melted Finally, under an inert gas atmosphere with a pressure of 0.5 MPa, nickel sulfide is blown into the molten pool according to 25% of the mass of nickel-tin-iron alloy waste through a spray gun to carry out sulfidation and detinning reaction. The high-temperature flue gas generated during the process is recovered after being cooled. Contains tin fume.

[0024] After dust collection, it is discharged into the atmosphere. After analysis and detection, the tin content in the obtained nickel-iron alloy was reduced to 0.8%, and the tin recovery rate reached 94.67%.

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Abstract

The invention discloses a method used for high efficient separation and enrichment of tin from nickel-tin-iron alloy waste material. The method comprises following steps: the nickel-tin-iron alloy waste material is delivered into a metallurgical furnace, and is fused when the metallurgical furnace is heated; after full fusing, a vulcanizing agent is added into the furnace hearth of the metallurgical furnace via a spray gun, and sulfuration detinning reaction is performed; and high temperature smoke generated in the step of sulfuration detinning reaction is cooled, and smoke dust containing tin in the high temperature smoke is recycled. Process of the method is short, energy consumption is low, operation is simple, separation and enrichment effect of tin is obvious, and qualified nickel-iron alloy raw material can be obtained. According to the method, a characteristic of the alloy waste material that sulfiding volatilization of tin is easy to happen is taken full advantages of, extract effect of tin is obvious; no other impurity element is induced into the furnace hearth, and quality of the obtained nickel-iron alloy is high; operation of the technological process is simple, and popularization and application prospect is promising.

Description

technical field [0001] The invention relates to a method for efficiently separating and enriching tin from nickel-tin-iron alloy waste, and belongs to the technical field of resource utilization. Background technique [0002] Non-ferrous metal nickel and tin are widely used in traditional industries and new technology fields. However, the mineable mineral resources such as nickel, tin, and iron are decreasing day by day, and the pressure on resources is increasing day by day. It is necessary and significant to strengthen the comprehensive utilization of corresponding secondary resources. The amount of nickel-tin alloy waste is increasing year by year, which mainly refers to waste generated during mechanical processing, waste generated during smelting, and damaged alloy components and parts in the industrial sector. In addition, most of the nickel-tin-iron alloy scrap currently circulating in the domestic market is purchased from Japan, South Korea, and Taiwan of China. Most ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B25/06
Inventor 王华李磊韩文朝邱在军廖彬
Owner KUNMING UNIV OF SCI & TECH
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