Method for decreasing impurity element tin in complex multi-element brass alloys

A technology of brass alloys and impurity elements, which is applied in the field of reducing complex multi-element brass alloy impurity elements tin

Active Publication Date: 2019-03-26
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to propose a method that can reduce the harmful element tin in the above-mentioned complex multi-element brass

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] After the waste miscellaneous copper raw material is pretreated, it is melted and sampled in an induction furnace. ICP measures that the Sn content is 4.87%. The slag agent sodium fluoride and 1% (weight percentage) additive sodium carbonate are cast after the heat preservation is completed, and the upper and lower ends of the ingot are taken to measure the ICP to get the average value, and the Sn content is 3.58%. The comparison results show that the tin content has decreased by 26.49%. .

Embodiment 2

[0027] After the scrap copper raw material is pretreated, it is melted and sampled in an induction furnace. ICP measures that the Sn content is 0.40%. The slag agent, sodium fluoride, was cast after the heat preservation was completed, and the upper and lower ends of the ingot were taken to measure the ICP and the average value was obtained. The Sn content was 0.30%, and the comparison results showed that the tin content decreased by 25%.

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PUM

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Abstract

The invention discloses a method for decreasing impurity element tin in complex multi-element brass alloys and belongs to the technical field of melt purification in the copper smelting process. A main treatment technology comprises the steps of sorting pretreatment, feeding and melting, smelting, and casting treatment. Complex multi-element scrap brass raw materials are subjected to sorting pretreatment firstly, after melting in an induction furnace, 2-20% (in percentage by weight) of a copper-calcium alloy (Cu-Cu 10) is added, smelting and heat preservation are conducted for 5-20 minutes, then 1% of slag conglomeration agent (sodium fluoride) is added, and heat preservation is conducted for 15-30 minutes, and casting is conducted until ingots are formed. Thecontent of tin in the treatedbrass alloys is decreased by 20-50%, so that the content of the impurity element tin in the complex multi-element brass alloys is decreased to the beneficial element range, and the quality of the alloys is improved.

Description

technical field [0001] The invention belongs to the technical field of melt purification in the copper smelting process, and in particular relates to a method for reducing the impurity element tin in complex multi-element brass alloys. technical background [0002] my country is short of copper resources, and the contradiction between raw material supply and consumption demand is becoming increasingly prominent. The recycling of waste miscellaneous copper can not only relieve the huge demand pressure of copper concentrates for domestic copper production enterprises, but also reduce energy consumption and pollutant emissions to a minimum. , to promote energy conservation and emission reduction in the copper industry as well as pollutant emissions. In recent years, China's secondary copper industry has developed rapidly, and the output of secondary copper has increased rapidly. The main source of secondary copper is scrapped copper-containing scrap, waste from the production o...

Claims

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Application Information

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IPC IPC(8): C22C1/06C22C1/03C22C9/00
CPCC22C1/03C22C1/06C22C9/00
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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