Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for removing impurity during copper and copper alloy melting process

A technology of copper alloy and induction melting furnace, which is applied in the field of metallurgical casting, can solve the problems of high production cost, large environmental pollution, high production energy consumption, etc., and achieve the effect of low processing cost, simple processing process and high processing efficiency

Inactive Publication Date: 2015-09-09
XINJIANG UNIVERSITY
View PDF2 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The production process adopted is long, the production energy consumption is high, the metal loss is large, the production cost is high, and the environmental pollution is large. Elements, harmful elements, valuable metals, etc., slagging, waste

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] The HNi65-5 brass alloy was smelted with the over-standard copper raw material with Pb content of 0.30%.

[0068] In the cored induction melting furnace, the copper raw material with excess Pb content is put into the cored furnace for melting according to the mass percentage of Cu with a mass percentage of 65%, and the melting temperature is 1150-1180℃. When the copper material is melted, use nitrogen + 8% O 2 As an oxidant, oxygen is introduced into the copper liquid. When blowing with oxygen, attention should be paid to the edges and corners, leaving no dead zone and blind zone in the blowing. The best blowing time is 3-5 minutes. After the blowing process is over, the alloy melt is allowed to stand for 10-15 minutes, so that the cuprous oxide and Pb in the copper liquid undergo oxidation reaction to generate lead oxide. Take samples to analyze the oxygen and lead content in the alloy. When the lead content meets the requirements of HNi65-5 alloy ingredients, accordi...

Embodiment 2

[0072] The QSn6.5-0.1 bronze alloy is smelted with the over-standard copper raw material whose Al content is 0.15%.

[0073] In the cored induction melting furnace, the copper raw material whose Al content exceeds the standard is put into the cored furnace for melting according to the mass percentage of Cu with a mass percentage of 93.5%, and the melting temperature is 1150-1180℃. When the copper material is melted, use nitrogen + 9% O 2 As an oxidant, oxygen is introduced into the copper liquid, and the blowing time is preferably 2-5 minutes. After the blowing process is over, the alloy melt is allowed to stand for 10-15 minutes, so that the cuprous oxide and Al in the copper liquid undergo oxidation reaction to generate alumina. Take samples to analyze the oxygen and aluminum content in the alloy, until the aluminum content meets the requirements of QSn6.5-0.1 bronze alloy. According to the analysis results, 0.1% phosphorus was added to the copper solution as a deoxidizer ...

Embodiment 3

[0077] The H65 brass alloy is smelted with the over-standard copper raw material with Fe content of 0.35%.

[0078] In the cored induction melting furnace, the copper raw material with excessive Fe content is put into the cored furnace for melting according to the mass percentage of 65% Cu, and the melting temperature is 1150-1180℃. When the copper material is melted, CuO is evenly added to the copper liquid, and the addition amount is 0.10%. Nitrogen is used as a stirring medium, and nitrogen is introduced into the copper liquid, so that the generated cuprous oxide rapidly diffuses in the copper liquid. 2-4 minutes is appropriate. After the blowing process is over, the alloy melt is allowed to stand for 10-15 minutes, so that the cuprous oxide and Fe in the copper liquid undergo oxidation reaction to generate iron oxide. Take samples to analyze the oxygen and iron content in the alloy, and wait until the iron content meets the requirements of H65 brass alloy. According to t...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a method for removing impurity during copper and a copper alloy melting process, which comprises the following steps: 1)a micro oxidation phase: introducing oxygen in a copper and copper alloy melt in a cored induction melting furnace, or a coreless induction melting furnace, or a shaft furnace, or a reverberatory furnace, or adding one or more from CuO, MnO2 and KMnO4 as an oxidizing agent for a slagging reaction; 2)a micro reduction phase: using one or more from metal Mg, Cr, Zr, B as a reducing agent, reducing and recovering the valuable metals in the oxidation process; and 3)a harmful impurity element harmlessness processing phase; adding one or more from Li, Ca, Zr, Mn for removing harmful impurity. The method can use the raw materials with low cost and low quality, or uses the outshot which has standard-exceeding impurity and harmful element, a simple micro oxidation-micro reduction-harmlessness processing is carried out on the current cored induction melting furnace, the coreless induction furnace or the shaft furnace, so that products with high quality can be produced.

Description

technical field [0001] The invention belongs to the technical field of metallurgical casting, and particularly relates to a method for removing impurities in the smelting process of copper and copper alloys. Background technique [0002] With the continuous deepening of circular economy, the direct recovery and utilization of scrap copper as raw materials for copper processing has become an important means for copper processing enterprises to reduce production costs and improve product competitiveness. The scrap copper often comes from different industries and different sectors of the society, and the composition is extremely complex. Different varieties of copper scrap often contain different types and percentages of alloying elements, trace elements and impurity elements. Some elements are harmful to the subsequent copper processing technology and copper processing products. [0003] In fact, the control of trace impurity elements in copper processing is very strict. ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C22C1/02C22C9/00C22B15/14
Inventor 贺永东孙郅程
Owner XINJIANG UNIVERSITY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com