Method for producing alloy through processing slag of autothermal furnace with direct current electric arc furnace

Abstract

The invention discloses a method for producing an alloy through processing slag of an autothermal furnace with a direct current electric arc furnace, and relates to a comprehensive processing method of nickel copper smelting slag. The method for producing the alloy through processing slag of the autothermal furnace with the direct current electric arc furnace is characterized in that a process ofthe method is to uniformly mix the slag of the autothermal furnace, reducing agent and calcic flux, then, perform reduction smelting at the direct current electric arc furnace, automatically layer reduction products according to different specific gravity, and respectively discharge a liquid metal and tailings, wherein the liquid metal is a copper nickel alloy. The method provided by the inventioncan fully use molten hot slag of the autothermal furnace, also can process stacked cold slag, can realize efficient synchronous separation and recycling of nickel and copper metals by adjusting amount of the reducing agent, the flux and reducing time, can solve problems of too much stockpiling of the slag and environment pollution, can optimize a technological process and simultaneously can effectively improve operation technology economic indicators of a system.

Description

technical field [0001] A method for producing alloys by treating autothermal furnace slag with a DC electric arc furnace, involving comprehensive treatment of nickel-copper smelting slag, in particular a method for producing copper-nickel alloys by using a DC electric arc furnace to reduce and smelt autothermal furnace slag to recover valuable metals . Background technique [0002] In the smelting and production of nickel and copper, the concentrates containing nickel and copper are processed by a high-sulfur mill-floating system to obtain secondary nickel concentrates and secondary copper concentrates, respectively. The main raw material for the self-heating furnace system of the pyromelting system is secondary copper concentrate, and its reaction zone is located in the slag layer. Sulfur blister copper and slag are released intermittently, and the produced slag is a desulfurized high-grade oxide slag with high copper content and low nickel content, in which the Ni+Cu grad...

AI Technical Summary

Problems solved by technology

[0003] Since there is no good treatment method, the slag produced by the self-heating furnace system has been piled up for a long time, which not only occupies a large amount of land, but also affects the surrounding ecological environment. Nickel, copper, iron, cobalt, gold, silver, etc. in the self-heating furnace slag have If the valence components are not effectively utilized, this resource will be greatly wasted

[0004] According to the different raw material conditions and smelting process, at present, a small amount of slag from the autothermal furnace is added to the converter and top-blown furnace for processing, which has the disadvantages of large disturbance to the normal production system, more metal losses such as nickel and copper, and the production process is difficult to control.