Method for deoxidizing copper or copper alloy, method for preparing high-purity copper or copper alloy, and high-purity copper or copper alloy obtained by the method

A technology for copper alloy and high-purity copper, which is applied in the field of copper and copper alloy preparation, can solve the problems of high oxygen content of copper and copper alloy and cannot meet the requirements of oxygen content of pure copper and copper alloy.

Active Publication Date: 2022-04-01
HENAN UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The oxygen content in copper and copper alloys obtained by smelting process under non-vacuum conditions in the prior art is relatively high, which cannot meet the requirements of modern industrial development for oxygen content in pure copper and copper alloys

Method used

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  • Method for deoxidizing copper or copper alloy, method for preparing high-purity copper or copper alloy, and high-purity copper or copper alloy obtained by the method
  • Method for deoxidizing copper or copper alloy, method for preparing high-purity copper or copper alloy, and high-purity copper or copper alloy obtained by the method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] The copper deoxidation method of the present embodiment may further comprise the steps:

[0048] (1) Pretreatment of copper metal material and covering agent

[0049] The covering agent is composed of the following components in mass percentage: Na 2 B 4 o 7 65%, SiO 2 20%, NaF 10%, Na 3 AlF 6 5%. First, according to the above ratio, the Na 2 B 4 o 7 , NaF, Na 3 AlF 6 and SiO 2 Put them into a mixing tank after weighing them respectively, then ball mill them on a ball mill for 3 hours, then put them into a drying box, and dry them at 150°C for 8 hours to remove moisture. The copper metal material is preheated at 450°C to remove moisture.

[0050] (2) Melting of metal material and covering agent

[0051] Argon gas is introduced from the bottom of the intermediate frequency induction furnace, and the gas flow rate is 0.5m 3 / h, the time is 10min, then preheat the furnace to 650°C; then add the pretreated copper metal material, and then add a covering age...

Embodiment 2

[0057] The copper deoxidation method of the present embodiment may further comprise the steps:

[0058] (1) Pretreatment of copper metal material and covering agent

[0059] The covering agent is composed of the following components in mass percentage: Na 2 B 4 o 7 60%, SiO 2 20%, NaF 10%, Na 3 AlF 6 10%. First, according to the above ratio, the Na 2 B 4 o 7 , NaF, Na 3 AlF 6 and SiO 2 Put them into a mixing tank after weighing them respectively, then ball mill them on a ball mill for 4 hours, then put them into a drying oven, and dry them at 250°C for 9 hours to remove moisture. The copper metal material is preheated at 430°C to remove moisture.

[0060] (2) Melting of metal material and covering agent

[0061] Inert gas such as helium is introduced from the bottom of the intermediate frequency induction furnace, and the gas flow rate is 0.8m 3 / h, the time is 8min, then preheat the furnace to 600 °C; then add the pretreated copper metal material, and then a...

Embodiment 3

[0067] The copper deoxidation method of the present embodiment may further comprise the steps:

[0068] (1) Pretreatment of copper metal material and covering agent

[0069] The covering agent is composed of the following components in mass percentage: Na 2 B 4 o 7 70%, SiO 2 15%, NaF 10%, Na 3 AlF 6 5%. First, according to the above ratio, the Na 2 B 4 o 7 , NaF, Na 3 AlF 6 and SiO 2 Put them into a mixing tank after weighing them respectively, then ball mill them on a ball mill for 6 hours, then put them into a drying oven, and dry them at 200°C for 10 hours to remove moisture. The copper metal material is preheated at 400°C to remove moisture.

[0070] (2) Melting of metal material and covering agent

[0071] Argon gas is introduced from the bottom of the intermediate frequency induction furnace, and the gas flow rate is 0.6m 3 / h, the time is 6min, then preheat the furnace to 680 ° C; then add the pretreated copper metal material, and then add a covering ...

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Abstract

The invention relates to a method for deoxidizing copper or copper alloy, a method for preparing high-purity copper or copper alloy and high-purity copper or copper alloy obtained by the method, belonging to the technical field of copper and copper alloy preparation. The invention provides a copper or copper alloy deoxidation method, comprising the following steps: feeding protective gas carrying reducing metal vapor or powder into the bottom of the copper or copper alloy melt. As a deoxidizer, the reducing metal can effectively remove the oxygen in the melt and form a low-density metal oxide that is easy to float. The floating of the powder improves the utilization rate of the reducing metal vapor or powder, strengthens the deoxidation effect, and is conducive to the automatic control of the deoxidation process. The protective gas not only plays the role of carrying the reducing metal, but also acts as a protective gas to avoid copper or copper alloys. The melt is oxidized, and has the function of stirring and carrying the deoxidized product to the surface, and the deoxidation is complete.

Description

technical field [0001] The invention relates to a method for deoxidizing copper or copper alloy, a method for preparing high-purity copper or copper alloy and high-purity copper or copper alloy obtained by the method, belonging to the technical field of copper and copper alloy preparation. Background technique [0002] Oxygen hardly dissolves in copper. When oxygen-containing copper solidifies, oxygen is precipitated in the form of eutectics and distributed on the grain boundaries of copper. When the oxygen content in as-cast oxygen-containing copper is extremely low, Cu 2 Hypoeutectic, eutectic, and hypereutectic of O. In copper alloys, the influence of oxygen coexisting with other elements is extremely complex, and has different degrees of influence on the mechanical properties, electrical conductivity and other properties of the alloy. At present, ordinary oxygen-free copper and copper alloys are usually smelted in induction furnaces, and high-purity oxygen-free copper ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B15/00C22B9/05C22C1/02C22C1/06C22C9/00
CPCC22B15/006C22B15/0052C22B9/05C22C1/02C22C1/06C22C9/00Y02P10/25
Inventor 宋克兴程楚周延军刘海涛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
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