Oxygen-free copper rod production method

A production method, the technology of oxygen-free copper rods, applied in the direction of improving process efficiency, etc., can solve the problems of high-quality oxygen-free copper materials, high requirements for production conditions, unstable oxygen content, etc., and achieve compact structure and high production efficiency. Low cost, effect of improving deoxidation effect

Inactive Publication Date: 2018-09-11
中海宏祥铜业江苏有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The diffusion deoxidation method covered by charcoal can reduce the oxygen content to a certain extent, but even in the best state of the covering process, the oxygen content can only be controlled at 20-50ppm, and the oxygen content is unstable, which cannot meet the requirements of high-quality oxygen-free copper. material needs
Vacuum heating is used to remove oxygen and impurities, and the requirements for production conditions are high, which greatly increases production costs.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] After the electrolytic copper required for smelting is removed from impurities and dust, it is heated and dried in a drying furnace at 750°C. After the electrolytic copper is put into the melting furnace, the water decomposes at high temperature to produce oxygen and melts into the copper liquid, causing copper The oxygen content of the water increases.

[0025] Add the dried electrolytic copper and dry oxygen scavenger into the melting furnace in batches for melting, the melting voltage is AC 380V, the melting temperature is 1170°C, and the heating rate is 10°C / min. It is composed of lanthanum in parts by weight, calcium chloride in 20 parts by weight and lithium oxide in 10 parts by weight. The weight ratio of electrolytic copper and oxygen scavenger is 1200:1. After the furnace temperature is raised to 1170 ° C, it is kept warm until the copper material Melting, inject protective gas nitrogen above the molten copper in the melting furnace to further prevent the entry...

Embodiment 2

[0029] After the electrolytic copper required for smelting is removed from impurities and dust, it is heated and dried in a drying furnace at 750°C. After the electrolytic copper is put into the melting furnace, the water decomposes at high temperature to produce oxygen and melts into the copper liquid, causing copper The oxygen content of the water increases.

[0030] Add the dried electrolytic copper and dry oxygen scavenger into the melting furnace in batches for melting, the melting voltage is AC 380V, the melting temperature is 1170°C, and the heating rate is 10°C / min. lanthanum, 40 parts by weight of calcium chloride and 30 parts by weight of lithium oxide, the weight ratio of electrolytic copper and oxygen scavenger is 1200:1, the temperature of the furnace is raised to 1170 ℃ and then kept warm until the copper material is melted , Inject protective gas nitrogen above the molten copper in the melting furnace to further prevent the entry of oxygen and water vapor, and c...

Embodiment 3

[0034] After the electrolytic copper required for smelting is removed from impurities and dust, it is heated and dried in a drying furnace at 750°C. After the electrolytic copper is put into the melting furnace, the water decomposes at high temperature to produce oxygen and melts into the copper liquid, causing copper The oxygen content of the water increases.

[0035] Add the dried electrolytic copper and dry oxygen scavenger into the melting furnace in batches for melting, the melting voltage is AC 380V, the melting temperature is 1170°C, and the heating rate is 10°C / min. lanthanum, 30 parts by weight of calcium chloride and 20 parts by weight of lithium oxide, the weight ratio of electrolytic copper and oxygen scavenger is 1200:1, the temperature of the furnace is raised to 1170 ℃ and then kept warm until the copper material is melted , Inject protective gas nitrogen above the molten copper in the melting furnace to further prevent the entry of oxygen and water vapor, and c...

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Abstract

The invention discloses an oxygen-free copper rod production method, which comprises the following steps of adding baked electrolytic copper and dried deoxidants into a melting furnace in batches formelting; after the melting, performing stirring through a graphite stirrer arranged in the melting furnace; then, introducing copper liquid deoxidized by a deoxidant into a heat insulation furnace; introducing nitrogen gas containing 1-percent natural gas into the heat insulation furnace; using an upper guiding method traction pulling casting machine to perform pulling casting on copper liquid toobtain the oxygen-free copper rod. The oxygen-free copper rod production method has the advantages that the process is simple; the production cost is low; the multiplex deoxygenation is performed on the raw materials; the deoxygenation effect is improved; meanwhile, the safety coefficient is high; the conditions are not harsh; wide market prospects are realized; the oxygen-free copper rod preparedby the method has a compact structure and bright surface; the oxygen content can be lower than 3ppm.

Description

technical field [0001] The invention relates to the field of nonferrous metal processing, in particular to an oxygen-free copper rod production method. Background technique [0002] Oxygen-free copper is a metal material with high conductivity, corrosion resistance, low temperature resistance, and good processing and welding performance. With the development of electronics, electric power, and communication industries, especially magnetic control components, radio frequency cables, and electric vacuum devices It is necessary to use high-purity and low-oxygen oxygen-free copper materials. Since electric vacuum devices are sealed in hydrogen during the manufacturing process, there are very strict regulations on the control of oxygen content in copper. If the oxygen content is too high, the following will occur: Phenomenon: ① Oxygen in the copper rod is in the state of copper oxide. From the crystallographic structure, copper oxide exists near the grain boundary. Copper oxide a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B15/14C22B9/10B22D11/14B22D11/111
CPCB22D11/004B22D11/111B22D11/145C22B9/006C22B9/10C22B15/006Y02P10/20
Inventor 叶春鸣吴峰陶智朱合启何秀荣
Owner 中海宏祥铜业江苏有限公司
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