Production method of raw copper

Abstract

The invention discloses a production method of raw copper. The production method specifically comprises the steps of firstly, adding copper concentrate, limestone and cuprous sulfide to a smelting furnace from a top feed opening of the smelting furnace at the same time, introducing mixed gas of high-pressure methane and oxygen from the side wall of the smelting furnace, igniting the mixed gas, and reacting for 10 h to 12 h, wherein rapid oxidation reaction and desulphurization reaction of a molten mixture occur, and sulfur dioxide generated after reaction passes through a waste heat recovery system and then is sent to an acid making system; then introducing mixed gas of high-pressure methane and oxygen from the side wall of the smelting furnace, so that reduction reaction occurs for 3 h to 5 h, and the raw copper and slag after reaction are respectively obtained. The positions and arrangement of air holes located in the side wall of the smelting furnace are improved, so that a multilayer fluid and turbulence area can be formed in the smelting furnace, the flowability of the molten mixture in the furnace is increased, the uniform mixing of copper ore and auxiliary materials is guaranteed, and the productivity is increased.

Description

Technical field [0001] The invention relates to the field of metal smelting, and more specifically, to a production method of blister copper. Background technique [0002] At present, 85% to 90% of copper is extracted from sulfide ore in the world, using the pyrometallurgical method. The method mainly includes the process steps of matte making and smelting of copper concentrate, copper matte blowing into blister copper, blister copper fire refining and anode copper electrolytic refining, and finally obtain pure copper with a purity of up to 99.95% and suitable for industrial use. [0003] The production method of blister copper is to desulfurize and remove iron from copper concentrate to smelt blister copper with a copper content of more than 95%. At present, there are three main smelting methods widely used in the world, namely the flash method, the Esa method and the blast furnace method. Wait. The blast furnace method is basically eliminated because it is difficult to control ...

AI Technical Summary

Problems solved by technology

However, in the actual process, since the raw material input into the production device is at least 1 ton at a time, and the temperature in the molten state is high (1080 ° C ~ 1800 ° C), the oxidation and reduction reactions will not be very sufficient, resulting in copper and ferroferric oxide contained in the slag. , resulting in the high cost and difficulty of the slag being further recovered and refined into pure iron, resulting in a large amount of slag being discarded and put aside, which not only wastes resources, but also pollutes the environment

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