Device and method for continuous refining waste purple impure copper

Abstract

The invention discloses a device and a method for continuously refining waste red-impure-copper. The device comprises a pre-oxidation shaft furnace, an oxidation furnace and a reducing furnace. An inner chamber of the oxidation furnace comprises an oxidization area, an acid slag clarifying area, a basic slag area and a basic slag collection area. The method comprises the following steps: (1) adding the waste red-impure-copper to the pre-oxidation shaft furnace for pre-oxidation, and allowing the impure copper solution to flow into the oxidization area of the oxidation furnace; (2) performing oxygen-enriched oxidation in the oxidation area, allowing the acid slag to flow into the acid slag clarifying area and then discharging the acid slag, and allowing the copper solution to flow into the basic slag area; (3) producing the basic slag in the basic slag area, discharging the copper solution containing heavy impurities, and allowing the basic slag and the pure copper solution to flow into the basic slag collection area; (4) discharging the basic slag from the furnace body, and allowing the pure copper solution to flow into the reducing furnace; and (5) reducing the pure copper solution in the reducing furnace. In the method, melting, oxidation and slag discharge as well as reduction occur in three furnaces respectively, thus realizing continuous copper production and continuous slag discharge, and being capable of reducing energy consumption and lowering labor intensity.

Description

technical field [0001] The invention belongs to the field of metal smelting, and in particular relates to equipment and a method for continuously refining waste copper. Background technique [0002] Today, directly regenerating high-grade waste copper into electrical copper has become an important measure for energy saving and emission reduction in the field of recycled copper. How to reduce the energy consumption of the process, reduce pollution, improve the ability to remove impurities, and expand the range of raw materials has become the focus of attention. Refining with No. 2 red copper containing 96% copper as the main raw material is divided into three stages: melting, oxidation slagging and reduction for casting. Today's reverberatory furnaces or tilting furnaces all use a one-stage method to directly process solid copper waste, that is, these three stages are completed in one furnace. This will lead to high energy consumption, high labor intensity, unstable product...

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Problems solved by technology

This will lead to high energy consumption, high labor intensity, unstable product quality, and complicated flue gas treatment

Furthermore, both the reverberatory furnace and the tilting furnace will inevitably be re-contaminated after oxidation.

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