Preparation process of low-oxygen copper rods

A preparation process and low-oxygen copper technology, applied in the direction of process efficiency improvement, metal rolling, furnace type, etc., can solve the problems of complex preparation process of low-oxygen copper rod, unstable product quality, and large environmental pollution, and achieve cost Low, easy-to-control, environmentally friendly effects

Active Publication Date: 2018-12-07
朱军良
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the technical problems of complex preparation process of low-oxygen copper rod, high environmental pollution, high cost and unstable product quality, the present invention provides a preparation process of low-oxygen copper rod, which uses natural gas to reduce copper water and controls the air pressure in the furnace at the same time It is a micro-negative pressure technical solution, which realizes the environment-friendly preparation of low-oxygen copper rods, and at the same time ensures product quality, and the process is simple and easy to control, suitable for large-scale promotion and application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A kind of production technology of low-oxygen copper rod, described technology comprises the following steps:

[0025] (1) Feeding: Classify and arrange the raw materials, and grade the copper content above 99.8% as first-class scrap copper, such as copper wires, conductive bars, wires and cables, requiring no tinning / zinc, no coating; copper content 98.8% -99.8% is grade 2 copper scrap, such as copper tubes, copper rods, motor wires with insulating varnish; copper content 95%-98.8% is grade 3 copper scrap, such as galvanized / tinned wires and plates , Non-alloy scrap copper mixture, etc. According to the proportion of the total mass of the three grades of scrap copper, 20% of the first-grade scrap copper, 60-70% of the second-grade scrap copper, and 5-25% of the third-grade scrap copper are prepared, and put into the reverberatory furnace at 1200-1250°C. In this embodiment, 108 tons of scrap copper are added in total, including 22 tons of first-grade copper scrap, 72 t...

Embodiment 2

[0033] A kind of production technology of 8mm low-oxygen copper rod, described technology comprises the following steps:

[0034] (1) Feeding: Grade 1 copper scrap with a copper content of 99.8% or more, such as copper wires, conductive bars, wires and cables, requires no tinning / zinc plating and no coating; grade 2 scrap with a copper content of 98.8%-99.8% Grade-3 scrap copper, such as copper tubes, copper rods, and motor wires with insulating paint; copper content of 95%-98.8% is rated as grade-3 scrap copper, such as galvanized / tin-plated wire, plate, non-alloy copper scrap mixture, etc. . In the present embodiment, 108 tons of scrap copper were added, including 18 tons of first-grade copper scrap, 75 tons of second-grade copper scrap, and 15 tons of third-grade copper scrap, which were put into a reverberatory furnace at 1200-1250° C.

[0035] (2) Melting: After all the raw materials are added to the furnace, the temperature is raised to 1250°C at a rate of 1.5 degrees p...

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Abstract

The invention provides a preparation process of low-oxygen copper rods, and belongs to the technical field of copper rod production. The preparation process of the low-oxygen copper rods comprises thesteps of feeding, melting, oxidation and decontamination, reduction, continuous casting and continuous rolling; in the reduction step, natural gas is used for reduction; the pressure of the natural gas is controlled within 0.35-0.45 MPa, and the flow is controlled within 90-120 m3 / h; the reduction time is 1-2 h; and when the natural gas is introduced, an exhaust fan is used for controlling the air pressure in a furnace within 0.01-0.03 MPa. The preparation process of the low-oxygen copper rods has the following beneficial effects: the method of cooperating the natural gas reduction with the furnace internal air pressure control is adopted to replace the log reduction, so that the production efficiency is greatly improved, the environment is protected, the process is simple and easy to control, meanwhile, the product quality is high, and the large-scale popularization and application are facilitated; and such recovered materials as waste copper are used as raw materials, so that the energy is saved.

Description

technical field [0001] The invention relates to the technical field of copper rod production, in particular to a production process of a low-oxygen copper rod. Background technique [0002] With the development of the electrical industry, the demand for materials such as cables and wires and the purity requirements are getting higher and higher. Low-oxygen / oxygen-free copper rods are widely used to guide electrical cables, especially low-oxygen copper rods with a diameter of 8mm. Its high purity, low oxygen content, and less impurities are favored by the market. The existing low-oxygen copper rods mainly adopt the continuous casting and rolling process. The steps include scrap copper pretreatment, feeding, melting, redox, slag removal, continuous casting and rolling. However, the current low-oxygen copper rods have high production process costs and environmental pollution. Large size, different product quality and performance, and many other shortcomings, cannot meet the pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B15/04C22B15/14C22B5/12B21B1/46
CPCB21B1/46C22B5/12C22B15/0036C22B15/006Y02P10/20Y02P70/10
Inventor 郑建伟
Owner 朱军良
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