Anode refining method for high sulphur raw copper

Abstract

The invention discloses an anode refining method for a high-sulfur blister copper, which comprises the following steps of: continuously introducing inert gas into a furnace in a process of allowing a high-sulfur blister copper liquid produced in a flash converting furnace to pass through a chute and flow into an anode furnace so as to boil the copper liquid inside the furnace; and promoting the sulfur in the copper liquid and the oxygen in the copper liquid to react with the oxygen absorbed from the atmosphere on the surface of the copper liquid to generate SO2 gas to discharge the copper liquid so as to remove the sulfur of more than 90 percent in the blister copper liquid. When the blister copper liquid completely enters the anode furnace, light-oxidation light-reduction work, non-oxidation and light-reduction work or cancellation of oxidation reduction work are respectively adopted according to the sulfur content of the copper liquid. The method overcomes the defects of a fire refining process of the high-sulfur blister copper, thereby effectively shortening operation time, improving production efficiency and production capacity and energy conservation, and eliminating pollution to atmosphere environment due to black smoke.

Description

technical field [0001] The invention relates to the field of copper metallurgy, in particular to a refining process for high-sulfur blister copper. Background technique [0002] The "double flash" copper smelting process is: copper concentrate → flash smelting → matte → flash blowing → crude copper → anode refining → anode copper → electrolysis → high-purity cathode copper, this process is currently the most advanced in the world One of the copper smelting processes is the development direction of copper smelting in the future, but the blister copper produced by the flash blowing process in this process has a higher sulfur content than the traditional PS converter blowing process, and the sulfur content of blister copper in the PS converter is generally 0.03~ 0.08%, while the sulfur content of blister copper in the flash converting furnace is generally as high as 0.1-5%. At present, the pyro-refining process of such high-sulfur blister copper still adopts the traditional dee...

AI Technical Summary

Problems solved by technology

This deep oxidation first and then deep reduction process will not only consume a large amount of non-renewable resources such as natural gas, resulting in energy waste, but also prolong the refining time, reduce the efficiency of copper smelting, and also have the problems of harsh operating environment and serious environmental pollution.

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