Method for reducing impurity element nickel in complex multi-element brass alloy

A brass alloy and impurity element technology is applied in the field of reducing the impurity element nickel of complex multi-element brass alloys to achieve the effect of improving alloy quality and reducing quantity

Active Publication Date: 2019-04-02
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to propose a method that can reduce the harmful element nickel in the above-mentioned complex multi-element brass alloy regeneration urgently needed to solve the tech

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0018] Example 1

[0019] After pretreatment of waste copper raw materials, they are melted and sampled in the induction furnace. Ni content measured by direct reading spectrometer is 0.88%, plus 0.25% (weight percent) of elemental boron coated with brass foil and slag remover (sodium fluorosilicate and calcium carbonate) Mass ratio 3:1) 1.5% (weight percentage) after the end of heat preservation, take samples of the upper and lower ends of the ingot to measure the direct-reading spectrometer and take the average value. The Ni content is 0.49%. The comparison result calculation shows that the nickel content has dropped by 44.3%.

Example Embodiment

[0020] Example 2

[0021] After pretreatment of waste copper raw materials, they are melted and sampled in the induction furnace. The nickel content measured by the direct reading spectrometer is 0.59%, plus 0.2% (weight percentage) of elemental boron coated with brass foil, slag remover (dolomite, calcium carbonate, hydrogen) Calcium oxide, the proportion of which is 6:2:1) 1% (weight percentage) after the end of heat preservation, cast, take samples of the upper and lower ends of the ingot and measure the direct reading spectrometer to get the average value. The Ni content is 0.36%. The comparison result can be calculated. The nickel content dropped by 39.9%.

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PUM

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Abstract

The invention discloses a method for reducing impurity element nickel in a complex multi-element brass alloy, and belongs to the technical field of metal copper refining and impurity removal. The maintreatment process comprises raw material pretreatment, melting, refining, slag removal and casting treatment. The complex multi-element brass alloy raw material is firstly pretreated by raw materialpretreatment process, impurities unrelated to copper materials are picked out, after being melted in an induction furnace at the temperature of 1100 -1300 DEG c, added the 0.1%-5 % (weight percentage)refining agent elementary substance boron which is coated with the copper foil and the raw material is subjected to heat preservation for 5-20 minutes, and adding a slag remover (the mass ratio of the sodium fluosilicate to the calcium carbonate is 3: 1 ) carrying out heat preservation for 15-30 minutes, and casting into ingots. According to the method for reducing impurity element nickel, the content of nickel in the cast ingot is reduced by 30%-60%, so that the content of the nickel in the brass alloy product produced by the complex raw material waste copper is reasonably controlled, and the competitiveness of the product is improved.

Description

technical field [0001] The invention belongs to the technical field of metal copper refining and impurity removal, and in particular relates to a method for reducing the impurity element nickel of complex multi-element brass alloys. technical background [0002] The scale of my country's smelting enterprises and processing enterprises continues to expand, leading to an increase in the demand for raw materials, and the contradiction between supply and demand is becoming more and more prominent. The production capacity of domestic smelting enterprises is expanding rapidly, and the demand for raw materials of smelting enterprises will increasingly depend on scrap copper. Scrap copper has a wide range of sources and complex mixed elements. How to remove various impurity elements to a reasonable range and play the important role of trace elements is an important issue faced by all recycled copper enterprises. [0003] Brass is an alloy composed of copper and zinc. Brass composed...

Claims

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Application Information

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IPC IPC(8): C22C1/03C22C1/06C22C9/04C22C18/02
CPCC22C1/03C22C1/06C22C9/04C22C18/02
Inventor 王成彦刘伟赵洪亮郭淑梅黄腾杨东超刘风琴
Owner UNIV OF SCI & TECH BEIJING
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