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

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

Active Publication Date: 2019-05-17
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 iron in the above-mentioned complex multi-element brass alloy regeneration technical problem that needs to be solved urgently. The purpose of impurity removal improves the competitiveness of products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] After the pretreatment of waste miscellaneous copper raw materials, they are melted and sampled in an induction furnace, and the Fe content is measured by a direct-reading spectrometer at 0.63%. Copper-boron alloy coated with brass foil and a slag-removing agent (the main components of the slag-removing agent are dolomite and calcium carbonate) are added. , calcium hydroxide, its proportioning is 6:2:1) and the additive sodium carbonate after the heat preservation is finished and cast, take the upper and lower ends of the ingot sample and measure the direct-reading spectrometer to get the average value, wherein the Fe content is 0.41%, and the comparison result calculation shows that, Iron content dropped by 34.9%.

Embodiment 2

[0024] After the pretreatment of waste miscellaneous copper raw materials, they were melted and sampled in an induction furnace, and the Fe content was measured by a direct reading spectrometer at 0.89%, and mixed elemental boron and a slag-removing agent wrapped with brass foil were added (the main components of the slag-removing agent were dolomite, calcium carbonate , Calcium Hydroxide, its proportion is 6:2:1) cast after heat preservation finishes, take the upper and lower ends of the ingot and measure the direct-reading spectrometer to take the average value, wherein the Fe content is 0.52%, and the comparison results show that the iron content has decreased 41.2%.

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Abstract

The invention discloses a method for reducing an impurity element iron in a complex multi-element brass alloy, and belongs to the technical field of reclaimed copper melt purification. A main treatment process of the method includes the steps of raw material pretreatment, magnetic separation, melting, refining and casting treatment, specifically, a complex multi-element waste brass raw material isfirstly subjected to raw material pretreatment to separate obvious non-copper impurities, a part of iron is separated by magnetic separation, then copper foil coated elemental boron or a copper-boronalloy is added after induction furnace melting for thermal insulation for 5-20min, then a slag removing agent (dolomite and the like) is added for thermal insulation for 15-30min, and casting into ingots is performed. The iron content of an ingot brass alloy is decreased by 25%-60%, the iron content in a reclaimed brass alloy is reasonably controlled, and the quality of ingot products is improved.

Description

technical field [0001] The invention belongs to the technical field of purification of recycled copper melts, in particular to a method for reducing the impurity element iron of complex multi-element brass alloys. technical background [0002] The contradiction between my country's low mine copper resources and copper consumption ranking first in the world is very obvious. The use of renewable resources just solves the problem of resource shortage. develop rapidly. The direct utilization method is the most favored method by enterprises. The scrap copper raw materials purchased back can be directly added into the furnace for refining and then produced into copper alloy products. However, the high content of iron in the production of brass alloy products by the direct utilization method seriously affects the Quality of products. [0003] The iron in the brass alloy can refine the structure of the ingot, and can also inhibit the grain growth during recrystallization, thereby i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/02C22C1/06C22C9/00
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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