Method for recovering valuable metals by double top-blowing smelting of high-impurity copper-containing materials

Abstract

The invention discloses a method for recovering valuable metal from high-impurity-content copper-contained materials through double-top-blowing smelting. The method comprises the steps of mixing high-impurity-content copper concentrate with quartz sand flux, coal, returned charge and / or returned dust in a matched mode, directly adding the mixture to a top-blowing smelting furnace, blowing oxygen into the smelting furnace for smelting, and feeding obtained mixed melt into a sedimentation electric furnace to obtain electric furnace slag and high-impurity-content copper matte through sedimentation and separation; conducting water quenching on the high-impurity-content copper matte to obtain copper matte particles; mixing the high-impurity-content copper matte, the quartz sand flux, the coal and refining slag in a matched mode, adding the mixture into a top-blowing converting furnace, and blowing oxygen into the converting furnace for converting to obtain blister copper and converting slag; mixing the electric furnace slag with the converting slag according to the weight ratio of 3:1-5:1, feeding the mixture into a slag mineral separation system to recover copper concentrate; placing the blister copper into an oxygen-rich combustion type anode furnace to be refined, and conducting casting to obtain a copper anode plate. By the adoption of the method, the adaptability of smelting equipment to the copper-contained materials such as the high-impurity-content copper concentrate can be improved, valuable metal in the high-impurity-content copper concentrate or / and the high-impurity-content copper matte can be effectively recovered, valuable metal dust contained in smoke generated during smelting can be effectively recovered, the technology is simple, and environment pollution is light.

Description

technical field

[0001] The invention relates to the technical field of non-ferrous metal smelting, in particular to a process and a device for smelting high-impurity copper-containing materials and recovering valuable metals. Background technique

[0002] Copper concentrate smelting mainly adopts flash smelting plus flash blowing process, or Isa smelting plus PS converter blowing process, or flash smelting and PS converter blowing process. Flash smelting of copper concentrate has high requirements on copper concentrate. It needs to grind the flux and other materials to a certain particle size, and then add roasting and other treatments before they can be processed in the flash furnace. The process is complicated. Flash smelting has higher requirements on the grade of matte, and generally requires the grade of matte to be above 70%, which makes flash smelting more suitable for processing high-grade matte, but it is difficult to adapt to high-impurity matte materials. In addi...

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