Fubang oxygen-enriched side-blown bath copper smelting furnace and operation method thereof

Abstract

The invention discloses a Fubang oxygen-enriched side-blown bath copper smelting furnace and an operation method thereof. The Fubang oxygen-enriched side-blown bath copper smelting furnace is characterized by comprising a melting furnace and a insulation electric furnace; a matte trough and a smelting slag trough respectively connect the melting furnace and the insulation electric furnace into a whole; the melting furnace is provided with a tertiary air orifice and a melt adding inlet; a slag chamber and a taphole are arranged in front of a melting chamber; a matte siphon is arranged at the low furnace bottom right opposite to slag chamber; and the insulation electric furnace heats individually. Matte and furnace slag are sent out to the insulation electric furnace continuously; the Fe3O4 content of the furnace slag is controlled at 3%-4%; a ratio of iron to silicon in the furnace slag is 1.1- 1.2; and the insulation electric furnace is added without any dilution agent. The furnace slag discharged by the device according to the method provided by the invention has copper content lower than 0.45%, so as to significantly reduce the labor intensity, save material consumption, and reduce production cost and construction investment in new plant.

Description

technical field [0001] The invention relates to process equipment and methods in the technical field of nonferrous metallurgy, in particular to a smelting device and method for extracting metallic copper from copper concentrates. Background technique [0002] In today's metal copper pyrometallurgical smelting process, molten pool smelting has been widely used due to its advantages such as strong raw material adaptability, high production efficiency, less smoke and dust emissions, and low residual copper in slag. Especially with the gradual reduction of the grade of copper ore entering the furnace, the aggravation of the status quo of more associated ore, high impurity content, and continuous depletion of copper ore raw materials, the advantages of molten pool smelting will be further revealed in the future. [0003] In the 1970s, molten pool smelting began to be widely used in copper smelting industrial production. In 1976, Vanyukov smelting furnace was put into production i...

AI Technical Summary

Problems solved by technology

[0005] The problem with the Vanyukov furnace is that the separate storage of slag and liquid matte will inevitably result in a large area of ​​equipment and a large heat loss, and the smelting process releases SO into the air. 2 More, not only makes the operating environment worse, pollutes the atmospheric environment around the enterprise, and adversely affects the survival of people and organisms. At the same time, the amount of monomeric sulfur in the flue gas is large, which is very harmful to subsequent equipment; In addition, due to the lack of reasonable settlement and separation space for the Isa smelting furnace and oxygen bottom-blowing copper smelting furnace used in pyrometallurgical copper smelting, the copper content in the slag produced by the production is relatively high. In order to recover the residual copper in the slag , it is also necessary to build and use relatively large slag concentrators and equipment to process smelting slag, which is unreasonable economically

Although the domestically newly developed molten pool melting furnaces have improved the above deficiencies to varying degrees, the existing problems have not been well resolved.

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