Integrated pyrometallurgical furnace and method for treating zinc leaching slag

Abstract

The invention discloses an integrated pyrometallurgical furnace and a method for treating zinc leaching slag. The integrated pyrometallurgical furnace comprises a smelting furnace body; a smelting area and an electric heating reduction area are defined in the smelting furnace body; a partition wall is arranged between the smelting area and the electric heating reduction area, and the smelting areacommunicates with the bottom of the electric heating reduction area; a material inlet, an oxygen-containing gas spray gun and a smelting flue gas outlet are arranged in the smelting area; and an electrode, a reducing agent spray gun, a zinc-containing steam outlet, a slag discharge port and a metal melt outlet are arranged on the electric heating reduction area. Therefore, the integrated pyrometallurgical furnace can realize short-flow and low-energy consumption treatment of the zinc leaching slag; lead, iron, silver, indium, germanium and other valuable metals are comprehensively recovered;and a zinc element has high direct yield.

Description

technical field [0001] The invention belongs to the field of metallurgy, and in particular relates to an integrated pyrometallurgy furnace and a method for treating zinc leaching slag. Background technique [0002] Zinc is an important basic metal raw material in national economic construction. From the perspective of market demand, in the past 10 years, the demand for zinc in my country's market has increased significantly. In order to meet the needs of national economic construction, my country needs to import a large amount of zinc concentrate every year. In the future, the import level of zinc concentrate in my country will reach about 2 million tons and continue to grow. However, the production level of secondary zinc-containing materials such as zinc leaching slag in my country is relatively low, and the market potential is huge. [0003] Zinc leaching slag is a solid waste slag produced in the process of hydrometallurgy, with complex components, containing various v...

AI Technical Summary

Problems solved by technology

Fire method mainly includes rotary kiln process, top blowing furnace process and fuming furnace process, etc. Among them, the process of zinc leaching slag is processed by rotary kiln. The process is simple to operate and the technology is relatively mature, but there are problems such as high energy consumption and low silver recovery rate; There are disadvantages such as high energy consumption, low bed energy rate, and high investment in the treatment of leached slag cold materials in fuming furnaces; the introduction cost of top-blown furnace treatment leached slag technology is too high, and the construction investment is large. Currently, only a few enterprises use this technology

The wet process is still in the stage of laboratory research and cannot be applied on a large scale, and waste acid or waste lye will be generated during the wet process (acid or lye) of zinc leaching slag, and the final slag will be treated The leaching agent (acid or alkali) will remain, and the gangue components in the slag will become secondary slag, which not only cannot be used, but also causes secondary pollution

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