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

Abstract

The present invention is oxygen-enriched air copper refining process in a converting furnace. The process features the oxygen-enriched air converting in the condition of oxygen pressure higher than the inner layer air pressure and common air converting in other condition, the control of the furnace temperature with cold copper material in oxygen-enriched air converting, the control of the coarse copper product quality through stopping addition of cold copper material before finishing the air refining of coarse copper product, and the alternate addition of oxygen-enriched air and common air to avoid generation of foamed slag. The present invention has improved operation environment, raised converting rate, lowered fuel consumption and raised economic benefit.

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] After the Ausmelt process, its smelting furnace showed good adaptability and expandability, and was quickly promoted in China. Although the converting furnace has certain environmental protection advantages, it has process safety problems and capacity constraints caused by foamy slag. problems, not being recognized among peers

In the past few years of the Ausmelt converting furnace, the frequency of major foam slag accidents occurred every three months, and the designed capacity of 35,000 tons was reached at the end of 2002, and it is very difficult to further expand the capacity

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