A kind of copper refining agent for waste electromagnetic wire and its preparation method and application

A technology for copper refining and refining agent, applied in the field of copper refining agent and its preparation, can solve the problems of undescribed, large consumption of rare earth elements and high cost, and achieve the advantages of avoiding secondary pollution, promoting the recycling industry and reducing costs. Effect

Active Publication Date: 2019-01-18
CENT SOUTH UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] There have been related reports on patents using rare earths as copper refining agents, such as: Patent [200910043041.8] "A high-rare-earth-content master alloy refining agent for refining scrap copper and its preparation method" reports the refining agent developed by it Rare earth elements include lanthanum, cerium, yttrium, praseodymium, etc. This refining agent can effectively remove impurities such as Zn, Fe, Pb, O, S, and P in scrap copper. This refining agent is also suitable for refining red copper, but the The specific content of yttrium and praseodymium and their specific functions in the refining process are not described in the patent, and the refining agent has almost no effect on the removal of Ni. In addition, the consumption of rare earth elements is too large, resulting in extremely high cost. high
Patent [CN1133347A] "New Refining Agent and Preparation Method for Copper Liquid" describes a refining agent containing B, Mg and rare earth, which can effectively remove hydrogen, oxygen and sulfur in copper. This refining agent is also suitable for red copper. But what is the specific rare earth component in this patent, it is not described
The above-mentioned patent has no clear statement on the minimum value of the oxygen content of the final product, and there are some problems in the removal of other impurity elements by the refining agent

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] Take 50 kg of surface-treated electromagnetic wires with a copper content of 99.72 wt % and refine them. First, dry the electromagnetic wire at 350°C for 2 hours, then put it into an intermediate frequency furnace and melt it at a temperature of 1160°C-1190°C, cover the copper liquid with calcined charcoal calcined at 700°C, add 0.15kg of this refining agent, and heat it at 700°C The calcined graphite rod is slightly stirred, slagging is made with a slagging agent, and the slag is cleaned and cast in a cylindrical iron mold to obtain an ingot, and the surface defects are turned off. Chemical analysis shows that the copper content is 99.96wt%, and the resistivity is 0.01720×10 -6 Ωm, the oxygen content is 8ppm.

Embodiment 2

[0068] The chemical composition of the waste magnet wire is shown in Table 1, and 100 kg of waste copper pipes with this composition are taken for refining treatment. First, dry the waste copper tube at 500°C for 2 hours, then put it into an intermediate frequency furnace and melt it at a temperature of 1180°C-1210°C, cover the copper liquid with graphite powder calcined at 700°C, add 0.4kg of this refining agent, and use 700°C ℃The calcined graphite rod was stirred a little, and after cleaning the slag, it was casted into an iron mold to obtain an ingot. The content of Fe and Ni.

[0069] Table 1

[0070]

Embodiment 3

[0072] Take 100 kg of copper waste magnet wires with a surface-treated copper content of 99.40 wt % for refining treatment. First dry it at 350°C for 2 hours, then melt it in an intermediate frequency furnace at a temperature of 1160°C-1190°C, cover the copper liquid with charcoal calcined at 700°C, add 0.5kg of this refining agent, and calcinate at 700°C Stir the graphite rod for a while, add slagging agent, remove the slag and cast it in a cylindrical iron mold to obtain an ingot, turn to remove surface defects, and cold forge to Annealed for 1 hour, cold drawn into The wire rod, the chemical analysis copper content is 99.95wt%, the resistivity is 0.01721×10 -6 Ωm, the oxygen content is 8ppm. The mechanical properties are Rm=412MPa.

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Abstract

The invention relates to a waste electromagnetic wire copper refining agent and a preparation method and application thereof. The refining agent is preferably composed of, by mass, 1.0-5.0% of V, 1.0-5.0% of Sr, 0.5-2.5% of B, 5.5-7.5% of Mg, 5-10% of Y, 5-10% of Ce and the balance Cu. According to the preparation method of the refining agent, Cu-B-Y-Ce-Mg intermediate alloy and Cu-Sr intermediate alloy are crushed into fragments with the particle size being smaller than 10 mm, and the fragments and vanadium with the particle size being smaller than 10 mm are mixed evenly according to a set proportion and then wrapped with a high-purity oxygen-free copper sheet to obtain the refining agent. The refining agent can be used for refining oxygen-free copper from waste copper electromagnetic wires, and the adding amount is 0.1-0.65 percent of the melt mass. The refining agent of the design has the good effects on deoxidation, desulfurization, dealumination, deferrization, denickelefication and the like, and does not pollute copper liquid secondarily. The refining agent is reasonable in component design and simple in preparation process and can achieve large-scale industrial application conveniently.

Description

technical field [0001] The invention relates to a copper refining agent, a preparation method and application thereof, and belongs to the technical field of development of a red miscellaneous copper liquid refining agent in the metallurgical industry. Background technique [0002] Countries around the world pay great attention to environmental protection and sustainable development, and the recycling of resources has become the focus of research and development in various countries. The cable industry in Europe and Japan attaches great importance to the recycling of resources. For example, Hitachi Cable Co., Ltd. of Japan continues to devote itself to the development of recycling technologies for waste wires and cables. Using waste magnet wire copper to directly manufacture high-end oxygen-free copper rods for electricians will save a lot of resources and reduce environmental pollution. ≤10ppm. Its technical difficulty is mainly reflected in the control of oxygen content a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B15/14C22B7/00C22B9/10
CPCC22B7/001C22B9/10C22B15/006Y02P10/20
Inventor 李周肖柱王永如龚深赵子谦
Owner CENT SOUTH UNIV
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