Method for removing iron and silicon impurities during regeneration of aluminum scraps

Abstract

The invention relates to a method for removing iron and silicon impurities during the regeneration of aluminum scraps, belonging to the field of impurity removal during the regeneration and recovery of non-ferrous metals. The method comprises the steps of putting 20-30% of borax, 20-30% of manganese chloride, 10-20% of calcium chloride, 10-20% of calcium oxide, 5-10% of magnesium carbonate, 5-10% of sulfur and 10-20% of filler into a stirring vessel, and mixing, so as to obtain iron removing flux; putting 30-50% of calcium sulfide, 20-40% of activated carbon, 5-10% of sulfur, 10-20% of calcium oxide and 10-20% of filler into a stirring vessel, and mixing, so as to obtain silicon removing flux; melting the aluminum scraps in a melting furnace, adding the iron removing flux into aluminum scrap molten liquid, stirring the aluminum scrap molten liquid, adding the silicon removing flux, stirring, and then, standing, so as to obtain aluminum scrap molten liquid; carrying out gas-blowing refining on the aluminum scrap molten liquid, and standing, thereby obtaining aluminum scrap melt in which iron and silicon impurity elements are removed. The method has the advantages that the yield of aluminum can not be affected, and the content of the iron and silicon impurity elements is lowered remarkably; the environment is not destroyed; the steps are simple.

Description

technical field [0001] The invention belongs to the technical field of non-ferrous metal recycling and impurity removal, and in particular relates to a method for removing iron and silicon impurities in the regeneration of waste aluminum. Background technique [0002] The secondary aluminum industry has become an indispensable and important part of the development of the aluminum industry. Nearly 12 million tons of various aluminum scraps are processed into secondary aluminum alloys every year in the world, and the technology for preparing high-performance aluminum alloys from secondary aluminum is aluminum processing. Inevitability of technological progress. At present, the biggest technical obstacle in the production of high-performance products by recycling waste aluminum is the inability to obtain suitable chemical components. Carry out effective classification, even if it is imported waste aluminum raw materials, it is also a mixture of seriously mixed raw materials wi...

AI Technical Summary

Problems solved by technology

[0009] Technical information about removing impurity elements in aluminum alloys can be found in published Chinese patent documents, typically such as "Methods for Removing Impurity Iron in Aluminum Alloys" provided by Authorized Publication No. CN101603129B and "Removal of Aluminum Alloys Method for containing silicon elements", although both of these two patents have the technical effects recorded in the technical effect column of the manual, but they have the disadvantages of high energy consumption and not suitable for industrial scale-up production requirements