Large-diameter high-purity oxygen-free copper cast blank horizontal continuous casting process and connected furnace

Abstract

The invention relates to a large-diameter high-purity oxygen-free copper cast blank horizontal continuous casting process. An oxide layer and particles are removed from the standby cathode copper surface, in addition, preheating treatment is carried out, and the preheating temperature is controlled to be 280 DEG C to 300 DEG C; pretreated cathode copper is placed into a smelting furnace to be smelted, the smelting temperature is controlled to be 1180 to 1230 DEG C, inert gas is introduced into the bottom of the smelting furnace, a calcined charcoal layer floats above molten copper to be used as the coverage, and the molten copper is stirred through electromagnetic stirring; then, the smelted molten copper flows into a heat insulation furnace, inert gas is introduced into the bottom of the heat insulation furnace, the calcined charcoal layer floats above molten copper to be used as the coverage, and the temperature inside the heat insulation furnace is controlled to be 1180 to 1230 DEG C; the molten copper in the heat insulation furnace is guided out, a graphite crystallizer is subjected to water cooling, and high-purity oxygen-free copper cast blanks are obtained. The process has the advantages that the oxygen content of the cast blanks can be effectively controlled, the production cost is reduced, products can completely reach TU1 standards, and the yield can reach more than 90 percent.

Description

technical field [0001] The invention relates to the technical field of oxygen-free copper casting, especially in the field of high-purity oxygen-free copper, and provides a large-diameter high-purity oxygen-free copper billet horizontal continuous casting process and a connected furnace. Background technique [0002] Industrial pure copper (processed copper) is usually divided into tough copper, phosphorus deoxidized copper and oxygen-free copper, of which oxygen-free copper is the highest quality grade, oxygen-free copper is a kind of high-conductivity pure copper, with high purity in chemical composition, The impurity content is low, especially the oxygen content is very low. Its most notable physical characteristics are high electrical conductivity (at least 100% IACS in the annealed state), good deformation properties and good welding and brazing properties. It is widely used It is used in fields such as electronics, communication and electric vacuum. [0003] TU1 (GBT5...

AI Technical Summary

Problems solved by technology

[0011] The technical problem to be solved by the present invention is: in order to overcome the technical problems of expensive equipment for producing TU1 oxygen-free copper in the prior art, high production cost and low production efficiency, and difficult control of oxygen content, the present invention provides a method based on horizontal continuous casting The large-diameter high-purity oxygen-free copper billet horizontal continuous casting process and its conjoined furnace have the characteristics of constant temperature and uniform melting, and the copper melt is deoxidized and dehydrogenated well, which solves the problem of oxygen content. The problem of control has greatly increased the overall production rate, reaching more than 90%, which has a leapfrogging significance compared with traditional technologies

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