Distillation zinc smelting technique by using biomass charcoal as reducer

Abstract

The invention provides a distillation zinc metallurgy technique taking the biomass charcoal as the reducing agent. Under the condition without changing the prior production technique basically, in the blending and briquetting process of the distillation zinc metallurgy technique, the biomass charcoal is taken as the reducing agent to perform the blending and briquetting processes; all the biomass charcoal can be taken as the reducing agent to perform the blending and briquetting processes; or part of the biomass charcoal and part of the clean coal are taken as the reducing agent to perform the blending and briquetting processes, thereby not only guaranteeing the production direct recovery rate and the product quality but also saving a large amount of high quality cleaned coal and lowering the production cost. The technique for directly producing the powered carbon by adopting crop stalks, particularly the maize straw, is simple, has low investment and low production cost, and is easy to obtain with low price; meanwhile, the combustible gas generated in the charcoal making process is purified and can be applied for the quantity of heat supply of a distillation zinc metallurgy system, thereby reducing the consumption of the medium-sized coal in order to decrease the energy consumption of the whole distillation zinc metallurgy system. The distillation zinc metallurgy technique provides an energy saving and consumption-reducing solution for the distillation zinc metallurgy technique, thereby realizing the sustainable development of the distillation zinc metallurgy production.

Description

technical field

[0001] The invention relates to the technical field of nonferrous metallurgy, in particular to the distillation zinc smelting technology using biomass charcoal as a reducing agent in zinc pyrometallurgy. technical background

[0002] There are two main methods of existing zinc metallurgy production: zinc pyrometallurgy and zinc hydrometallurgy. Zinc distillation is one of the pyrometallurgical methods of zinc. Since this method makes full use of the property that the vapor pressure of liquid metal zinc increases rapidly with the increase of temperature, the direct yield of production is high and the product quality is good. the classic method. However, due to the high energy consumption of this method and the dependence on a large amount of high-quality clean coal, the application in the field of zinc metallurgical production is gradually decreasing. Zinc electrolysis (belonging to zinc hydrometallurgy) and closed blast furnace zinc smelting (belonging to z...

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