A method for deoxidizing copper melt, pure copper material, and preparation method of pure copper material

A melt and pure copper technology, applied in the field of deoxidation of copper melt, can solve the problems of reducing the oxygen content in high-purity and high-conductivity copper, the chemical composition of copper is exceptional, and the deoxidization ability is limited, so as to reduce the oxygen content and resist hydrogen embrittlement. Excellent performance, low density effect

Active Publication Date: 2021-03-09
HENAN UNIV OF SCI & TECH
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition to the deoxidizers disclosed in the above-mentioned prior art, the deoxidizers commonly used in the prior art also include phosphorus copper, lithium-calcium alloy, lithium-copper alloy, magnesium boride, boron slag, magnesium, etc. The ability is limited, and it is easy to contaminate the copper melt. If you are not careful, the chemical composition of copper will be out of line, and it will not be able to effectively reduce the oxygen content in high-purity and high-conductivity copper.

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

[0032] The preparation method of the pure copper material of the present embodiment comprises the following steps:

[0033] 1) Place the electrolytic cathode copper in the smelting furnace and cover it with a covering agent, then pass in Ar gas for protection, and then heat up to melt the electrolytic copper to form a copper melt at 1200±20°C;

[0034] 2) Under the protection of Ar gas, keep the temperature of the copper melt at 1200±20°C, introduce carbon monoxide gas from the bottom of the copper melt, and sample the copper melt to detect the oxygen mass percentage content during the process of introducing carbon monoxide. Stop feeding carbon monoxide when the oxygen mass percentage in the melt drops below 0.002%, to obtain a pre-deoxidation copper melt (the actual measured oxygen mass percentage is 0.002%);

[0035] 3) Under the protection of Ar gas, keep the temperature of the pre-deoxidized copper melt obtained in step 2) at 1200±20°C, add alkali metal cored wire to the d...

Embodiment 2

[0040] The preparation method of the pure copper material of the present embodiment comprises the following steps:

[0041] 1) with the step 1) of embodiment 1);

[0042] 2) Under the protection of Ar gas, keep the temperature of the copper melt at 1200 ± 20°C, add high-purity graphite powder (carbon content ≥ 99.9wt%) in the copper melt by intermittent feeding method and use high-purity graphite rod ( carbon content ≥ 99.9wt%) to stir, and after each feeding, the copper melt is sampled to detect the oxygen mass percentage content, and when the oxygen mass percentage content in the melt drops below 0.002%, the feeding is stopped, and the pre-deoxidation treatment copper is obtained. melt;

[0043] 3) Under the protection of Ar gas, keep the temperature of the pre-deoxidized copper melt obtained in step 2) at 1200 ± 20 ° C, and sample the copper melt during the process of adding metal potassium block in the deoxidized copper melt Detect the oxygen mass percentage content, and...

Embodiment 3

[0048] The preparation method of the pure copper material of the present embodiment comprises the following steps:

[0049] 1) with the step 1) of embodiment 1);

[0050] 2) Under the protection of Ar gas, keep the temperature of the copper melt at 1200±20°C, add high-purity graphite powder (carbon content ≥ 99.9wt%) to the copper melt by intermittent feeding, and simultaneously Feed carbon monoxide to stir the copper melt. After each feeding, the copper melt is sampled to detect the oxygen mass percentage content. When the oxygen mass percentage content in the melt drops below 0.002%, stop feeding and stop feeding carbon monoxide. Obtain pre-deoxidation treatment copper melt;

[0051] 3) Under the protection of Ar gas, keep the temperature of the pre-deoxidized copper melt obtained in step 2) at 1200±20° C., blow into the Ar gas carrying metal sodium vapor at the bottom of the deoxidized copper melt, and blow into the metal sodium. During the steam Ar gas process, the coppe...

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 relates to a method for deoxidizing a copper melt, a pure copper material, and a preparation method for a pure copper material, and belongs to the technical field of nonferrous metal processing. A method for deoxidizing a copper melt of the present invention comprises the following steps: adding an alkali metal to the copper melt; the alkali metal is selected from one or both of sodium and potassium. The method for deoxidizing the copper melt of the present invention can reduce the oxygen content in the copper melt to an extremely low level by utilizing the properties of the alkali metal sodium and potassium that have strong reducing properties and are easily combined with oxygen. In addition, the oxides formed by the combination of sodium and potassium with oxygen have low density and low melting point, and are easy to float up and get rid of from the copper melt, and the boiling point of metal sodium and potassium is much lower than the melting temperature of copper, and the excess metal sodium and potassium are easy to Excluded from the copper melt, so that while reducing the oxygen content in the copper melt, no new impurities are added to the melt.

Description

technical field [0001] The invention relates to a method for deoxidizing a copper melt, a pure copper material, and a preparation method for a pure copper material, and belongs to the technical field of nonferrous metal processing. Background technique [0002] High-purity and high-conductivity copper has excellent electrical and thermal conductivity, cold and hot processing performance, hydrogen embrittlement resistance, high temperature oxidation resistance and vacuum volatilization performance, etc. It is used to manufacture high-performance and reliability-critical electronic and power devices The key materials, especially the manufacture of vacuum electronic devices, high-power IGBTs, electric vacuum devices, integrated circuits, automotive electronics, aerospace and military electronic components, have an urgent demand for high-purity and high-conductivity copper. [0003] For high-purity and high-conductivity copper, especially for high-purity and high-conductivity co...

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 Patents(China)
IPC IPC(8): C22C1/06C22C9/00C22C1/02
CPCC22C1/02C22C1/06C22C9/00
Inventor 宋克兴刘海涛周延军程楚安世忠张彦敏皇涛国秀花李韶林朱一明宋金涛张凌亮
Owner HENAN UNIV OF SCI & TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap