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Carbon monoxide and nitrogen adding rapid oxygen removal technology for up-drawing copper smelting

A technology of carbon monoxide and nitrogen, which is applied in the field of copper smelting deoxygenation process by the up-drawing method, can solve the problems of high oxygen content in the solution and affect the quality of castings, and achieve the goal of expanding the contact area, improving the quality of castings, and reducing the scrap rate of copper products Effect

Inactive Publication Date: 2021-07-30
芜湖恒泰有色线材股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Aiming at the deficiencies of the prior art, the present invention provides the carbon monoxide plus nitrogen quick deoxygenation technology for copper smelting by the up-drawing method, which solves the problem that the high oxygen content in the solution affects the quality of castings during the copper smelting process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The present invention provides a technical solution: the carbon monoxide plus nitrogen quick deoxygenation technology for smelting copper materials by the up-drawing method includes the following steps:

[0027] S1: Seal and evacuate the melting furnace, then inject nitrogen into the melting furnace for 10 minutes, then open the vent, squeeze out the remaining unexhausted oxygen from the vent of the melting furnace, then seal and vacuum the melting furnace, and then pass nitrogen , so repeated many times, play the role of oxygen barrier and deoxygenation, reduce impurities;

[0028] S2: After cutting, selecting and drying the raw copper that needs to be melted, it is immediately added to the furnace for smelting through the feeder;

[0029] S3: Under the protection of nitrogen atmosphere, add the calcined and baked charcoal particles into the smelting furnace and lay them on the surface of the molten copper liquid. The charcoal particles are continuously burned and lost...

Embodiment 2

[0037] The present invention provides a technical solution: the carbon monoxide plus nitrogen quick deoxygenation technology for smelting copper materials by the up-drawing method includes the following steps:

[0038] S1: Seal and evacuate the melting furnace, then inject nitrogen into the melting furnace for 10 minutes, then open the vent, squeeze out the remaining unexhausted oxygen from the vent of the melting furnace, then seal and vacuum the melting furnace, and then pass nitrogen , so many times;

[0039] S2: After cutting, selecting and drying the raw copper that needs to be melted, it is immediately added to the furnace for smelting through the feeder;

[0040] S3: Under the protection of nitrogen atmosphere, add the calcined and baked charcoal particles into the smelting furnace and lay them on the surface of the molten copper liquid. The charcoal particles are continuously burned and lost, and the height is maintained;

[0041] S4: A mixed gas of nitrogen and carbo...

Embodiment 3

[0048] The present invention provides a technical solution: the carbon monoxide plus nitrogen quick deoxygenation technology for smelting copper materials by the up-drawing method includes the following steps:

[0049] S1: Vacuumize the melting furnace, then inject nitrogen into the melting furnace for 10 minutes, then open the vent, squeeze out the remaining unexhausted oxygen from the vent of the melting furnace, then seal and vacuum the melting furnace, and then pass nitrogen , so many times;

[0050] S2: After cutting, selecting and drying the raw copper that needs to be melted, it is immediately added to the furnace for smelting through the feeder;

[0051]S3: Under the protection of nitrogen atmosphere, add the calcined and baked charcoal particles into the smelting furnace and lay them on the surface of the molten copper liquid. The charcoal particles are continuously burned and lost, and the height is maintained;

[0052] S4: A mixed gas of nitrogen and carbon monoxid...

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Abstract

The invention discloses a carbon monoxide and nitrogen adding rapid oxygen removal technology for up-drawing copper smelting, and relates to the technical field of up-drawing copper smelting oxygen removal technologies. The carbon monoxide and nitrogen adding rapid oxygen removal technology for up-drawing copper smelting comprises the steps that a smelting furnace is sealed and vacuumized, nitrogen is introduced into the smelting furnace for 10min, then a ventilation opening is opened, remaining oxygen which is not completely exhausted is extruded out of the ventilation opening of the smelting furnace, the smelting furnace is sealed and vacuumized, then nitrogen is introduced, the operation is repeated multiple times, raw material copper needing to be molten is cut, selected and dried and then is immediately added into the furnace through a feeding machine to be smelted, under protection of the nitrogen atmosphere, dried charcoal particles obtained after calcining and baking are added into the smelting furnace to be laid on the molten copper liquid level, and after the charcoal particles are continuously combusted and lost, supplementing is carried out, and the height is kept. According to the technology, oxygen removal treatment is carried out on the smelting furnace before smelting, carbon monoxide generated by combining nitrogen and carbon monoxide is introduced into molten copper, cuprous oxide in the molten copper is reduced, and the purpose of rapid oxygen removal is achieved.

Description

technical field [0001] The invention relates to the technical field of copper material smelting and oxygen removal technology by upward drawing method, in particular to the carbon monoxide plus nitrogen rapid oxygen removal technology for copper material melting by upward drawing method. Background technique [0002] Upward continuous casting copper material production process is mainly used to produce long-length bright oxygen-free copper tubes and long-length bright oxygen-free copper flat profiles. Rapid deoxidation of molten copper is the core technology in the upward continuous casting copper material production process One, copper is easily oxidized during the smelting process, and deoxidation is the key to the purification of copper melt. Oxygen-free copper has no hydrogen embrittlement, high electrical conductivity, good processing performance, welding performance, corrosion resistance and low temperature performance. [0003] During smelting, the gas mainly exists i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D11/111B22D11/117B22D11/14
CPCB22D11/111B22D11/117B22D11/004B22D11/145
Inventor 李勇
Owner 芜湖恒泰有色线材股份有限公司
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