Electric heating preparation method for copper-aluminum alloy raw material

Abstract

The invention discloses an electric heating preparation method for a copper-aluminum alloy raw material. The copper-aluminum alloy raw material comprises the following components of, by weight percent, 49-58% of kaolin with Cu2O3 weight percentage less than or equal to 1%, 5-13% of aluminum oxid, 34-38% of bituminous coal with volatile weight percentage more than or equal to 32%, and sodium ligninsulfonate liquid accounting for 20-22% of the total weight of the three mentioned raw materials, prepared by hot water at 30-60 DEG C and having a density of 1.100-1.200 g / cm<3>. According to the electric heating preparation method for the copper-aluminum alloy raw material, the high-quality kaolin and the bituminous coal produced in China are adopted, cost of the copper-aluminum alloy raw material is low and reduced by 15-20%, meanwhile harmful substances contained in the copper-aluminum alloy are less, and an impurity removal process is simple and convenient. The copper-aluminum alloy prepared by the preparation method for the copper-aluminum alloy raw material equally includes the following elements of, by weight percent, 56.7% of Al, 38.8% of Si, 0.87% of Ti, 1.3% of Fe, 0.37% of Ca, 1.5% of C and 0.5% of other impurities.

Description

technical field [0001] The invention relates to a raw material for preparing copper-aluminum alloy, in particular to an electrothermal preparation method of copper-aluminum alloy raw material. Background technique [0002] At present, a copper-aluminum alloy raw material electrothermal preparation method in Ukraine includes: kaolin concentrate, kyanite-sillimanite concentrate, alumina, carbon reducing agent and binder-sodium sulfonate. The kaolin concentrate in the raw materials used is obtained by beneficiating kaolin through complex processes, and its cost is much higher than that of kaolin; the carbon reducing agent in the raw materials used is mainly petroleum coke, and a small amount of bituminous coal is used, and its cost is relatively high; therefore, the produced The cost of raw materials for copper and aluminum alloys is relatively high. In addition, due to the impurities contained in the kyanite-sillimanite concentrate in the raw material such as ZrO 2 SiO 2 、T...

AI Technical Summary

Problems solved by technology

The kaolin concentrate in the raw materials used is obtained by beneficiating kaolin through complex processes, and its cost is much higher than that of kaolin; the carbon reducing agent in the raw materials used is mainly petroleum coke, and a small amount of bituminous coal is used, and its cost is relatively high; therefore, the produced The cost of raw materials for copper and aluminum alloys is relatively high

In addition, due to the impurities contained in the kyanite-sillimanite concentrate in the raw material such as ZrO 2 SiO 2 、TiO 2 , CuOTiO2, (Cr, Cu) 2 o 3 , was reduced during smelting, so that Zr, Ti, Cu, and Cr entered the alloy. To remove these harmful impurities, special metallurgical treatment must be carried out. Not only the process is complicated, but also the production cost of copper and aluminum alloys will be increased.