Device and method for preparing high-purity copper and copper alloy ingot

Abstract

The invention provides a device and a method for preparing high-purity copper and a copper alloy ingot. The device comprises a heating furnace, wherein a casting mould channel is arranged in the heating furnace, a plurality of heating elements are uniformly arranged in the furnace wall of the heating furnace, a cooling support is arranged at the bottom of the heating furnace, a casting mould is arranged in the casting mould channel, the bottom of the casting mould is connected with the cooling support, and the bottom of cooling support is connected with a traction device. The method mainly comprises the following steps of: (1) melting electrolytic copper or a copper alloy of which the weight purity is more than 99.9999% in a crucible under the condition of being vacuum or filling inert gases, (2) using the heating elements in the furnace wall of the heating furnace to heat the side wall of the casting mould uniformly, and (3) injecting molten metal in the crucible into the casting mould of which the side wall is heated through a tundish, and then carrying out traction on the cooling support downwards through the traction device, so that the casting mould forms a temperature gradient that the temperature is increased from the bottom up.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and relates to a device and a method for preparing high-purity copper and copper alloy ingots. Background technique [0002] For the preparation of high-purity and ultra-high-purity copper ingots, the vacuum ingot mold casting method is commonly used at present. Chinese patent CN101199988 uses vacuum smelting to pour molten ultra-pure copper into a preheated mold (the mold is preheated to a certain temperature outside the furnace and then loaded into the furnace for standby), and the ingot is obtained through natural cooling; Japanese Patent Laid-Open No. 7 -21432, vacuum smelting is used, and the mold is preheated above 800°C before the ultra-pure copper is melted and casted, and then cast into shape. The 99.9999% ultra-pure copper ingot prepared by the above method has less investment and low cost, but there are many problems in the process. For example, Chinese patent CN101199988, the pre...

AI Technical Summary

Problems solved by technology

[0005] Therefore, it is hoped to find a new melting and casting method, which can not only solve the defects of ingot internal pores, shrinkage porosity, rough surface, large shrinkage cavity, and success rate in the current high-purity copper and copper alloy mold casting method, but also ensure Simple equipment structure and process, high purity of ultra-high-purity copper ingots, low content of gas elements, good physical quality, high yield, low cost, high efficiency and large-scale production

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