Method and device for achieving low-temperature quick separating of metallic copper in copper slag through supergravity

Abstract

The invention discloses a method and device for achieving low-temperature quick separating of metallic copper in copper slag through the supergravity and belongs to the field of comprehensive utilization of resources. Firstly, 3-5% of carbon powder is added in the copper smelting slag discharging process to serve as a reducing agent to reduce magnetite particles in the slag into ferrous oxide, andthe ferrous oxide and silicon dioxide in the slag form a fayalite phase; then, copper slag melts are continuously added into a supergravity reactor through a flow guiding system, and the temperatureof the copper slag is controlled; and then, a centrifugal rotation system is started, the supergravity reactor is driven by a motor to conduct centrifugal rotation, the gravity coefficient and the separating time are controlled, and continuous separating between the metallic copper and the molten slag is achieved through the supergravity generated by centrifugal rotation. According to the method and device, under the condition of the supergravity, low-temperature quick separating between the metallic copper in the copper slag and the molten slag is achieved, the copper-slag separating efficiency is improved, the purity degree and recovery rate of the metallic copper are increased, the metallic copper with the Cu content being larger than 85% and an iron-slag-rich phase with the Cu contentbeing lower than 0.15% are obtained, and the recovery rate of Cu reaches 97% or above; and according to the method, operation is easy, the cost is low, and continuous production can be achieved.

Description

technical field [0001] The invention belongs to the field of high-efficiency separation of secondary resources under special conditions, and specifically relates to a method for rapidly separating metallic copper in copper slag at low temperature under high gravity. Background technique [0002] With the continuous development of my country's copper smelting industry, copper ore resources have been increasingly exhausted. At present, copper ore containing 0.2%-0.3% copper has been mined and utilized, while the copper content in the slag produced during the copper smelting process has reached 0.5% or more. Limited by the traditional copper smelting process, the residual copper content in the produced copper slag continues to increase. How to efficiently recycle and utilize this part of copper resources has become an important issue for the current copper smelting industry. An important measure for the intensive development of copper production. [0003] At present, the main ...

AI Technical Summary

Problems solved by technology

The fire depletion method mainly uses high-temperature melting to separate the liquid copper metal in the slag from the molten slag, but it is limited to the dispersed distribution of fine metal droplets in the slag, which makes the slag have high viscosity, poor fluidity, and slag-gold The interfacial tension between copper and slag is high. To achieve effective separation between copper and slag, not only high temperature above 1300°C and free settling time of more than 30 minutes are required, but also additional reducing agent, vulcanizing agent, and ventilation, stirring and other methods are required. Enhanced Separation

Therefore, the current process of treating copper slag by pyrolysis depletion process is cumbersome and complicated, with long smelting cycle and poor separation effect

Images