Batching and smelting method for smelting blister copper by scrap copper

Abstract

The invention relates to a batching and smelting method for smelting blister copper by scrap copper, which comprises the steps of batching of raw materials and auxiliary materials and feeding according to a ratio of refining slag to pig iron to lime stone of 5:1:0.1, wherein the raw materials comprise 57 to 59 percent of bulk scrap copper and 41 to 43 percent of refining slag; the auxiliary materials comprise the pig iron and the lime stone; the step of feeding comprises the process of: firstly feeding a mixture of 4 to 6 t of bulk scrap copper and 1t of pig iron by a charging hopper; after heating to enable the materials to be in a softened state, feeding a mixture of the bulk scrap copper, the refining slag, the pig iron and the lime stone according to a proportion that the ratio of the bulk scrap copper to the refining slag is 1:(1 to 2) and the pig iron is 1 t or and the lime stone is 0.25 to 0.3 t; after completing feeding of the auxiliary materials, feeding the residual bulk scrap copper and refining slag into a metallurgical furnace according to a ratio of the bulk scrap copper to the refining slag of (1 to 3):1 until all the materials are fed completely. The batching and smelting method fills up the gap of a batching and feeding technology in an actual low-grade scrap copper refining process, improves service life of the metallurgical furnace and reduces copper content of smelting slag.

Description

technical field [0001] The invention relates to the technical field of smelting waste miscellaneous copper, in particular to a batching and smelting method for smelting blister copper from waste miscellaneous copper. Background technique [0002] In the scrap copper smelting industry, the type or content of impurities in the scrap copper directly affects the service life of the metallurgical furnace. However, the incoming materials of low-grade miscellaneous copper scraps with copper content less than 90% are complex and diverse. The copper grade of raw materials such as brass reaches more than 80%, while the copper grade of refined copper slag is only about 20%. Therefore, it is extremely important to seek a reasonable scrap copper raw material, additive batching and feeding process. However, in today's low-grade miscellaneous copper scrap smelting enterprises, the ratio of raw materials and smelting are relatively random, and a set of stable and reasonable low-grade misc...

AI Technical Summary

Problems solved by technology

However, in today's low-grade scrap copper smelting enterprises, the ratio of raw materials and smelting are relatively random, and a set of stable and reasonable low-grade scrap copper ingredients and smelting processes have not been formed so far.

Even though some manufacturers have carried out research on low-grade scrap copper ingredients and smelting methods, the furnace life and slag copper content have not been very good.