Non-oxidation non-reduction fire refining process for copper

Abstract

The invention discloses a non-oxidation non-reduction fire refined copper process. The oxygen concentration in copper liquid at the converting endpoint ranges from 0.05 to 0.3 percent; the oxidation-reduction operation in an anode furnace is canceled; gas which does not react with copper is blown into the anode furnace and the copper liquid is mixed forcibly until refining operation endpoint is reached, and oxygen and impurities which are contained in the copper liquid originally react with the gas so as to remove the impurities and oxygen at the same time. The non-oxidation non-reduction fire refined copper process has simple technology, convenient operation, high productivity effect, and low energy consumption without a reducer, avoids black smoke pollution, and is suitable for the large-scale industrial production.

Description

technical field [0001] The invention relates to the technical field of copper smelting, and is particularly suitable for the pyro-refining process of copper. Background technique [0002] The production process of copper smelting is "copper concentrate-smelting-blowing-fire refining-electrolysis-cathode copper". Among them, fire refining is an essential and very important process in copper smelting production. At present, the world's The pyro-refining process of copper smelters basically adopts the traditional oxidation-reduction method, that is, after the blowing copper liquid is loaded into the anode furnace, air (oxygen) is blown into it to oxidize it, and the impurities are oxidized and removed, and then Use a reducing agent to perform reduction operations to remove excess oxygen in the copper liquid. The main disadvantage of this method is that oxidation and reduction are two opposite operating processes, with low production efficiency, high energy consumption, and seri...

AI Technical Summary

Problems solved by technology

[0002] The production process of copper smelting is "copper concentrate-smelting-blowing-fire refining-electrolysis-cathode copper". Among them, fire refining is an essential and very important process in copper smelting production. At present, the world's The pyro-refining process of copper smelters basically adopts the traditional oxidation-reduction method, that is, after the blowing copper liquid is loaded into the anode furnace, air (oxygen) is blown into it to oxidize it, and the impurities are oxidized and removed, and then Use a reducing agent to perform reduction operations to remove excess oxygen in the copper liquid. The main disadvantage of this method is that oxidation and reduction are two opposite operating processes, resulting in low production efficiency, high energy consumption, and serious black smoke pollution.

[0003] In order to solve the shortcomings of redox refining, Chinese patent CN1184337C discloses a crude copper non-oxidative nitrogen-doped reduction fire refining process, that is, the oxidation process of blowing air is canceled in the refining stage, and nitrogen is mixed into the reducing agent Compared with the traditional oxidation-reduction method, this invention saves the oxidation process, shortens the operation time, and improves the reduction efficiency. The disadvantage is that the reduction operation is not canceled, and the reducing agent is still needed, and the black smoke pollution is not fundamentally eliminated.

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