A kind of red miscellaneous copper refining agent and preparation method thereof

Abstract

The invention discloses a red impure copper refining agent and a preparation method thereof. The red impure copper refining agent is complex alloy, and chemical components of the red impure copper refining agent include, by weight, B 3.5-5.5%, Mg 3.5-5.0%, Ce 8.0-11.5%, Pr 6.0-8.0%, Y 6.0-8.0%, rare earth elements including Ce, Pr and Y 20.0-27.5% and the balance Cu. The preparation method of the red impure copper refining agent comprises the following steps: (a) performing vacuum pumping after electrolytic copper is molten; and (b) stopping vacuum pumping, feeding high-purity inert gas, adding intermediate alloy, and keeping the temperature within a range from 1150 DEG C to 1200 DEG C for 10-20 minutes. The red impure copper refining agent and the preparation method has the advantages that the fed high-purity inert gas after vacuum pumping can effectively prevent burning-out and deviation of alloying elements in the refining agent due to the fact that the intermediate alloy largely volatilizes when added, and accurate control of the components is facilitated; the refining agent can effectively remove N1, and the removal rate can reach to more than 68%.

Description

technical field [0001] The invention belongs to the field of red miscellaneous copper liquid refining agents in the metallurgical industry, in particular to the refining agent components of red miscellaneous copper and a preparation method thereof. Background technique [0002] Red copper refers to copper alloys with copper content greater than 96% and above. At present, the method of recycling red copper to prepare pure copper is mainly to cast red copper into anode copper through fire treatment, and then electrolytically refine it into electrolytic copper. Through electrolytic purification, it is bound to consume a large amount of energy. Compared with the method of electrolytic purification and reproducing products by ore smelting, the direct use of red copper to produce pure copper alloy products will save energy by more than 80%, which is about 80% more energy-saving than the method of electrolytic purification and reproducing products. 50%, and the electrolysis proces...

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Problems solved by technology

[0008] 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 little effect on the removal of Ni

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. However, the specific rare earth components in this patent are not described, and the removal of impurities such as Ni is not described.

[0009] In summary, the currently used copper deoxidation, dehydrogenation, desulfurization and refining agent technologies for removing other impurity elements in copper cannot fully meet the needs of using red copper to directly prepare high-quality oxygen-free copper rods for electrical applications, especially Today, with the rapid development of high-tech fields, the quality requirements for high-conductivity and high-thermal-conduction products are getting higher and higher. Therefore, it has become an urgent task to improve the technical level and metallurgical quality of copper refining.