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

Melt purifying method for oxygen-free copper rod

A melt purification, oxygen-free copper rod technology, applied in the direction of improving process efficiency, can solve the problems of high price, insignificant effect, pollute the melt environment, etc., achieve strong adsorption capacity, avoid secondary oxidation and hydrogen absorption Effect

Active Publication Date: 2016-11-09
安徽晋源铜业有限公司
View PDF8 Cites 16 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Generally speaking, although there are many types of purification fluxes for copper melts in my country, they often have single functions, ineffective effects, high prices, or pollute the melts or are harmful to the environment.
Moreover, along with the presence of solid phase impurities in the melt, there are also a large number of gas phase impurities in the melt, which pose a great challenge to the production of oxygen-free copper rods

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

[0024] The melt purification method of a kind of oxygen-free copper rod that the present invention proposes, comprises the following steps:

[0025] S1. Alkali washing the copper material with 5wt% sodium silicate solution at 80°C to remove surface oil, then pickling with 10wt% hydrochloric acid at room temperature to remove the oxide film, and finally drying at 80°C for 10min , and then added to the smelting furnace to melt to obtain a melt, adding quartz sand for refining, the amount of quartz sand being 0.3% of the copper mass, standing still, and removing slag;

[0026] S2, adding a purification flux to the melt obtained in S1, the purification flux is composed of 60% sodium borate, 15% sodium fluorosilicate, 10% cryolite, 10% sodium chloride, and 5% sodium carbonate by weight percentage, The amount of the purification flux is 0.25% of the mass of the copper material, the temperature of the melt is kept at 1160°C, and high-purity nitrogen with a purity ≥ 99.99% is continuo...

Embodiment 2

[0030] The melt purification method of a kind of oxygen-free copper rod that the present invention proposes, comprises the following steps:

[0031]S1. Alkali washing the copper material with 10wt% sodium silicate solution at 70°C to remove surface oil, then pickling with 15wt% hydrochloric acid at room temperature to remove the oxide film, and finally drying at 60°C for 20min , and then added to the smelting furnace to melt to obtain a melt, adding phosphor copper for refining, the amount of phosphor copper is 0.1% of the copper material quality, standing still, and removing slag;

[0032] S2, adding a purification flux to the melt obtained in S1, the purification flux is composed of 60% sodium borate, 10% sodium fluorosilicate, 15% cryolite, 5% sodium chloride, and 10% sodium carbonate by weight percentage, The amount of the purification flux is 0.15% of the mass of the copper material, the temperature of the melt is kept at 1180°C, and high-purity nitrogen with a purity ≥ 9...

Embodiment 3

[0036] The melt purification method of a kind of oxygen-free copper rod that the present invention proposes, comprises the following steps:

[0037] S1. Alkali washing the copper material with 7wt% sodium silicate solution at 75°C to remove surface oil, then pickling with 12wt% hydrochloric acid at room temperature to remove the oxide film, and finally drying at 70°C for 15min , and then added to the smelting furnace to melt to obtain a melt, adding boron oxide for refining, the amount of boron oxide is 0.2% of the copper mass, standing still, and removing slag;

[0038] S2, adding a purification flux to the melt obtained in S1, the purification flux is composed of 62% sodium borate, 11% sodium fluorosilicate, 13% cryolite, 6% sodium chloride, and 8% sodium carbonate by weight percentage, The amount of the purification flux is 0.2% of the mass of the copper material, the temperature of the melt is kept at 1170°C, and high-purity nitrogen with a purity ≥ 99.99% is continuously ...

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

PropertyMeasurementUnit
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention discloses a melt purifying method for an oxygen-free copper rod. The melt purifying method for the oxygen-free copper rod includes the following steps that S1, a copper material is subjected to alkaline washing and acid pickling, after being dried, the copper material is added into a smelting furnace to be molten, and then refining, standing and slag skimming are performed; S2, a purifying fluxing agent is added into melt and is composed of, by weight percentage, 60%-65% of sodium borate, 10%-15% of sodium fluorosilicate, 10%-15% of cryolite, 5%-10% of sodium chloride and 5%-10% of sodium carbonate, and high-purity nitrogen is continuously introduced into the melt; S3, a deoxidizing agent composed of a Cu-Re alloy and a Cu-B alloy is then added into the melt, and stirring is performed till uniform distribution is achieved; and S4, the melt is led to flow into a heat-preserving furnace, and the surface of the melt is covered with a layer of crystalline flake graphite used for isolating hydrogen and oxygen in air. The melt purifying method for the oxygen-free copper rod has both the impurity removing effect and the gas removing effect, and a guarantee is provided for producing the high-purity and high-conductivity oxygen-free copper rod.

Description

technical field [0001] The invention relates to the technical field of melt purification, in particular to a method for purifying an oxygen-free copper rod melt. Background technique [0002] With the development of science and technology, the wire and cable industry has higher and higher quality requirements for electrical copper rods, and oxygen-free copper rods have good electrical conductivity, ductility, air tightness and low tendency to hydrogen embrittlement. The industry has been widely favored. Among them, the purification treatment of copper melt is the key to improving the quality of oxygen-free copper rods. Many scholars at home and abroad have done a lot of research on the purification technology and process of the melt, and have made some progress. [0003] At present, the flux purification process has become a purification method commonly used in copper melt purification production due to its high impurity removal efficiency, low cost, and convenient operatio...

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
Patent Type & Authority Applications(China)
IPC IPC(8): C22B9/10C22B9/05C22B9/02C22B15/14
CPCC22B9/023C22B9/05C22B9/10C22B15/006Y02P10/20
Inventor 潘加明
Owner 安徽晋源铜业有限公司
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