Oxygen-enriched air refining method for copper by using converting furnace

Abstract

The present invention provides a method for oxygen-enriched copper blowing in a blowing furnace. , the inner wind pressure is greater than the oxygen pressure, stop the oxygen-enriched operation, and carry out air blowing; 2. Furnace temperature control: After adding oxygen-enriched blowing, due to the accelerated reaction speed of the molten pool, in order to control the furnace temperature by reducing the reduced coal or the second cycle Add a small amount of cold ice copper to control the furnace temperature; 3. Control the quality of blister copper: when the concentration of sulfur dioxide SO2 gradually decreases, stop adding cold frost copper when the blister copper blowing is about to end; 4. Adopt blowing and blowing while adding cold material Oxygen enrichment is used in the first cycle, and the oxygen enrichment operation is stopped at the end of the second cycle to reduce the risk of foamy slag. It improves the operating environment, increases the blowing speed, reduces fuel consumption and increases economic benefits.

Description

technical field [0001] The invention relates to copper smelting technology, in particular to a process operation and control method of an Ausmelt blowing furnace under oxygen-enriched conditions. Background technique [0002] At present, the blister copper production process mainly adopts PS converter blowing technology in the blowing stage. The biggest feature of this technology is that the entire blowing process is completed in a rotating furnace body, and the slagging reaction is completed in one cycle of blowing. After the slagging is completed, the slag is Clean up, enter two-cycle blowing, two-cycle desulfurization reaction, and finally produce qualified blister copper containing more than 98.6% copper. PS converter is a periodic operation, causing a large amount of heat loss during the transfer process of copper matte and blowing products And low-altitude pollution, flue gas volume and flue gas composition fluctuate greatly, sulfuric acid production control is difficu...

AI Technical Summary

Problems solved by technology

[0006] 2. Disadvantages of Ausmelt converting furnace

[0009] (2), low production capacity, not suitable for large-scale industrial production needs

[0010] The production capacity of Ausmelt converting furnace is 35,000 tons, but due to the use of air blowing mode, the amount of oxygen participating in the blowing reaction is limited, and it is difficult to increase the production capacity, which is not suitable for large-scale industrial production.

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