Flash smelting method and device for zinc sulfide concentrates and materials containing lead and zinc

Abstract

The invention discloses a flash smelting method and a device for zinc sulfide concentrates and materials containing lead and zinc. The flash smelting method for the zinc sulfide concentrates and the materials containing the lead and the zinc comprises mixing the dry powder materials containing lead and zinc in proportion and spraying the mixed materials and oxygen into a smelting device from the top of a reaction tower; the smelting device is formed by three portions namely a reaction tower area, a reducing area and a clarification area which are provided with communicated bottoms; materials containing zinc achieve a oxidation sweetening reaction in the air above the reaction tower to generate into high zinc slag melt with an appropriate melting point of minus 1200 DEG C and fall into the reaction tower area; the liquid form high zinc slag melt enters into the reducing area; zinc in the high zinc slag melt is performed reduction to generate zinc steam to be collected; lead is performed reduction to be metallic lead; precious metal such as golden, silver and the like of raw materials are gathered to be precipitated at the bottom of a melt pond and discharged through a lead discharging opening. Slags which are performed reduction are discharged through a slag discharging opening, fuming processing is abandoned or further performed according to the content of the lead and the zinc. The flash smelting method and the device for the zinc sulfide concentrates and the materials containing the lead and the zinc have the advantages of being short in process, strong in material adaptability, low in energy consumption, environmentally friendly, high in resource utilization efficiency, significant for technology progress of a lead and zinc smelting industry and the like.

Description

technical field [0001] The invention relates to a flash smelting method and equipment for zinc sulfide concentrate and materials containing lead and zinc, belonging to the technical field of nonferrous metal smelting. Background technique [0002] my country is the world's largest producer of zinc. In 2012, the output of zinc metal was 5.13 million tons, most of which used the traditional wet process (roasting-leaching-electrolysis), and a small part of it used the fire process (closed blast furnace zinc smelting, Vertical tank zinc smelting, electric furnace zinc smelting). In addition to the shortcomings of long process flow, large investment, high production cost and poor comprehensive recovery, the traditional zinc hydrometallurgy process also has the following serious problems: 1) The amount of alum slag is huge, cannot be processed, and it will be stored for a long time, polluting the environment; The leaching slag still needs to be treated by pyrolysis, which consumes...

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the shortcomings of the existing technology and provide a solution for the serious problems of the existing zinc smelting process, such as long process flow, serious pollution of waste water and waste residue, high production cost (electrolysis power consumption ≥ 3000kwh), and poor comprehensive recovery. A flash smelting method and equipment for zinc sulfide concentrates and lead-zinc-containing materials; to realize continuous and efficient smelting of zinc sulfide concentrates and other various lead-zinc-containing materials, with the advantages of environmental protection and cleanliness, low energy consumption, high production efficiency, and good comprehensive recovery The advantages

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