A method for efficiently separating and enriching tin from nickel-tin-iron alloy waste

A technology for separation, enrichment and ferroalloy, which is applied in the direction of improving process efficiency, can solve problems such as environmental pollution, equipment corrosion, complicated operation, etc., and achieve the effect of high quality, short process and simple operation.

Active Publication Date: 2016-01-13
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • A method for efficiently separating and enriching tin from nickel-tin-iron alloy waste

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Put the nickel-tin-iron alloy scrap (its main chemical composition is (unit: mass fraction): Fe=30, Sn=15, Ni=55) in an electric furnace, heat up to 1550°C, the scrap starts to mix and melt; wait until the scrap is fully melted , Under an inert gas atmosphere with a pressure of 0.1MPa, pyrite is blown into the molten pool at 10% of the mass of the nickel-tin-iron alloy waste through a spray gun to carry out the sulfide detinification reaction. The high-temperature flue gas generated in the process is cooled and recovered Tin-containing smoke and dust.

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

Embodiment 2

[0020] Put the nickel-tin-iron alloy scrap (its main chemical composition is (unit: mass fraction): Fe=35, Sn=18, Ni=47) in an electric furnace, heat up to 1570°C, the scrap starts to mix and melt; wait until the scrap is fully melted Under an inert gas atmosphere with a pressure of 1MPa, pyrite and sulfur are blown into the molten pool at 20% of the mass of the nickel-tin-iron alloy waste through a spray gun to carry out the sulfide detinning reaction. The high-temperature flue gas produced in the process is cooled Recover tin-containing smoke and dust.

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

Embodiment 3

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

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

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Abstract

The present invention discloses a method for efficiently separating and enriching tin from nickel-tin-iron alloy scrap. The method comprises that: nickel-tin-iron alloy scrap is added into a metallurgy furnace, the material is subjected to mixing melting under a heating effect of the metallurgy furnace, a vulcanizing agent is blown into the melting pool through a spray gun after the material is subjected to complete melting so as to carry out a vulcanizing detinning reaction, the high temperature flue gas produced during the process is cooled, and the tin-containing flue dust is recovered. According to the present invention, characteristics of short process, low energy consumption, easy operation, and significant tin separation and enrichment effect are provided, and the qualified nickel-iron alloy raw material can be obtained; the characteristic that tin in the alloy scrap is easily subjected to vulcanizing volatilization is completely utilized, and the tin separation effect is significant; other impurity elements are not introduced in the melting pool, and the quality of the remaining nickel-iron alloy raw material is high; and the operation of the process is simple, and the promotion application prospect is good.

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 metals nickel and tin have been widely used in traditional industries and new technologies. However, mining resources such as nickel, tin and iron are declining, and resource pressure is increasing day by day. Strengthening the comprehensive utilization of corresponding secondary resources is essential and significant. The amount of nickel-tin alloy scrap is increasing year by year, which mainly refers to the waste generated during machining, the waste generated during the smelting process, and the alloy components and parts damaged in the industrial sector. In addition, most of the nickel-tin-iron alloy scraps currently circulating in the domestic market are purchased from Japan, South Korea and Taiwan, China. Most of them are scraps produced by...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/00C22B25/06
CPCY02P10/20
Inventor 王华李磊韩文朝邱在军廖彬
Owner KUNMING UNIV OF SCI & TECH
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