Equipment for recovering valuable metals from zinc-contained slag

Abstract

The invention discloses equipment for recovering valuable metals from zinc-contained slag, comprising a melting furnace, a top-blown spray gun which is inserted into the hearth from the top of the melting furnace so as to spray oxygen-contained gas and pulverized coal into the hearth and a side-blown spray gun which is inserted into the hearth from the side of the melting furnace so as to spray the oxygen-contained gas and the pulverized coal into the melting pool, a fuming furnace and a fuming furnace spray gun, wherein a hearth is limited in the melting furnace; the hearth is divided into an upper part and a lower part; the lower hearth is a melting pool; the melting furnace is provided with a charging hole, a smoke outlet and a melted slag outlet; the fuming furnace is provided with a feeding hole, a smoke outlet, a waste slag outlet and an air inlet arranged on the upper part of the fuming furnace, wherein the feeding hole is connected with the melted slag outlet of the melting furnace; and the fuming furnace spray gun is inserted into the fuming furnace so as to spray the oxygen-contained gas and the pulverized coal into the fuming furnace. The equipment for recovering the valuable metals from the zinc-contained slag can continuously work and has high slag treatment capacity and high recovery rate of the valuable metals.

Description

technical field [0001] The invention relates to a device for recovering valuable metals from zinc-containing slag, in particular to a device for recovering valuable metals from zinc-smelting residues. Background technique [0002] Zinc smelting slag is usually rich in valuable metals such as zinc, lead, silver, and antimony, and needs to be recycled. In addition, zinc smelting slag has been included in the "National Hazardous Waste List", and smelting slag containing a large amount of soluble zinc and lead salts belongs to the first class of pollutants and requires harmless treatment. [0003] The traditional treatment of zinc smelting slag basically adopts the rotary kiln volatilization method. For example, Chinese patent application CN1405338A describes a method for treating zinc smelting slag using a rotary kiln. As a traditional zinc smelting slag treatment process, the rotary kiln volatilization method has obvious disadvantages: low operating rate, short kiln lining li...

AI Technical Summary

Problems solved by technology

As a traditional zinc smelting slag treatment process, the rotary kiln volatilization method has obvious disadvantages: low operating rate, short kiln lining life, high comprehensive energy consumption, small processing capacity, large investment, large coke consumption, tailings containing Zn, C advanced

However, the melting and redox of the above process are carried out in one reaction vessel, and continuous operation cannot be realized, so the operation rate is low, the amount of slag treatment is limited, and the content of valuable metals in the waste slag is still high

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