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

A flash smelting and materials technology, applied in the field of non-ferrous metal smelting, can solve the problems of long process flow, high production cost, poor comprehensive recovery, etc., and achieve the effects of solving long-term pollution, improving production efficiency, and saving energy consumption

Inactive Publication Date: 2013-11-06
CENT SOUTH UNIV
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  • Description
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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 smel

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

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Effect test

Embodiment 1

[0057] See attached figure 1 , a flash smelting equipment for zinc sulfide concentrate and lead-zinc-containing materials in the present invention, comprising a smelting furnace body, the bottom of the smelting furnace body is a rectangular space 3 made of refractory materials, and the area of ​​the bottom is 20-120m 2 , the rectangular space 3 is provided with two partition walls 7, and the rectangular space 3 is divided into three areas connected to each other at the bottom, which are respectively the reaction tower area, the reduction area, and the clarification area; in the reaction tower area, along the bottom of the furnace body In the vertical direction, a vertical flue 1 and a reaction tower 2 are arranged successively; in the reduction zone, a zinc steam flue 8 is arranged vertically along the bottom surface of the furnace body, and on the walls on both sides of the furnace body, extension To the nozzle 9 of the inner cavity of the furnace; in the clarification zone, ...

Embodiment 2

[0065] A flash smelting smelting method for zinc sulfide concentrate and lead-zinc-containing materials, comprising the following steps:

[0066] Step 1: Ingredients

[0067] The average particle size of the preparation is ≤0.045mm, calculated by mass percentage, and the composition includes Zn26.73%, lead 18.44%, Fe14.23%, S19.15%, SiO 2 8.42%, CaO2.67%, H 2 O ≤ 0.3%, the mass percent sum of each component is 100% lead-zinc powdery material;

[0068] The second step: oxidative desulfurization

[0069] The lead-zinc-containing material and oxygen obtained in the first step are sprayed from the top of the reaction tower through the feeding spray gun, and the lead-zinc-containing material completes the oxidation desulfurization reaction in the air of the reaction tower, and the generated high-concentration desulfurization flue gas passes through the vertical flue to the waste heat boiler After cooling down and collecting dust, it is sent to the acid production process; the re...

Embodiment 3

[0084] A flash smelting smelting method for zinc sulfide concentrate and lead-zinc-containing materials, comprising the following steps:

[0085] Step 1: Ingredients

[0086] The average particle size of the preparation is ≤0.045mm, calculated by mass percentage, and the composition includes Zn30.16%, lead 12.16%, Fe14.42%, S20.08%, SiO 2 6.92%, CaO1.84%, H 2 O ≤ 0.3%, the mass percent sum of each component is 100% lead-zinc powdery material;

[0087] The second step: oxidative desulfurization

[0088] The lead-zinc-containing material and oxygen obtained in the first step are sprayed from the top of the reaction tower through the feeding spray gun, and the lead-zinc-containing material completes the oxidation desulfurization reaction in the air of the reaction tower, and the generated high-concentration desulfurization flue gas passes through the vertical flue to the waste heat boiler After cooling down and collecting dust, it is sent to the acid production process; the re...

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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...

Claims

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Application Information

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IPC IPC(8): C22B13/02C22B19/04
Inventor 唐朝波陈永明唐谟堂刘志宏杨声海何静杨建广叶龙刚
Owner CENT SOUTH UNIV
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