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Method for extracting metal lead and zinc through bottom blowing oxygen-enriched self-heating smelting-electric smelting direct reduction

A self-heating smelting and metal extraction technology, which is applied in the field of metallurgy, can solve the problems of long process flow and harsh conditions, and achieve the effects of wide applicability of raw materials, avoiding reoxidation, and reducing losses

Pending Publication Date: 2020-11-27
岷山环能高科股份公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the problems of long technological process and harsh conditions in the prior art, the present invention provides a method for extracting metal lead and zinc through bottom-blown oxygen-enriched self-heating smelting-electric smelting direct reduction, which can obtain metal lead products as well as Obtain metal zinc to increase the added value of products

Method used

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  • Method for extracting metal lead and zinc through bottom blowing oxygen-enriched self-heating smelting-electric smelting direct reduction
  • Method for extracting metal lead and zinc through bottom blowing oxygen-enriched self-heating smelting-electric smelting direct reduction
  • Method for extracting metal lead and zinc through bottom blowing oxygen-enriched self-heating smelting-electric smelting direct reduction

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Effect test

Embodiment 1

[0045] The main raw materials are lead, zinc, sulfur lead-zinc sulfide ore, lead-zinc oxide ore and flux calcium oxide, silicon dioxide to make a mixture. The composition of the mixture is Pb 45%, Zn 8%, Fe 14%, SiO 2 7%, CaO 4%, Cu 1%, S 14%, Au 10g / t, Ag1500g / t; the mixed material is sent to the bottom-blown oxidation furnace 1 through the raw material inlet 11, and the pressure is 0.6-1.3Mpa through the spray gun 14 High-pressure oxygen, the temperature in the furnace is 950-1200°C, and SO is obtained after smelting 2 Flue gas, lead liquid and oxide slag melt, in which SO 2 The flue gas consists of SO 2 The flue gas is discharged from port 12, and is made into sulfuric acid after the steps of waste heat boiler and electric dust collection.

[0046] The oxide slag melt is sent into the electric smelting reduction furnace 2 through the airtight chute 15 from the feed port 21, and coal, silicon dioxide, and calcium oxide are added. The addition of coal is 7% of the oxide sl...

Embodiment 2

[0050] The main raw materials are lead, zinc, sulfur lead-zinc sulfide ore, lead-zinc oxide ore and flux calcium oxide, silicon dioxide to make a mixture. The composition of the mixture is Pb 45%, Zn 8%, Fe 14%, SiO 2 7%, CaO 4%, Cu 1%, S 14%, Au 10g / t, Ag1500g / t; the mixed material is sent to the bottom-blown oxidation furnace 1 through the raw material inlet 11, and the pressure is 0.6-1.3Mpa through the spray gun 14 High-pressure oxygen, the temperature in the furnace is 950-1200°C, and SO is obtained after smelting 2 Flue gas, lead liquid and oxide slag melt, in which SO 2 The flue gas consists of SO 2 The flue gas is discharged from the port 12, and is made into sulfuric acid after the steps of waste heat boiler and electric dust collection;

[0051] The oxidized slag melt is sent into the electric melting reduction furnace 2 through the closed chute 15 from the feed port 21, and coal, silicon dioxide, calcium oxide and cold material containing lead-zinc oxide are adde...

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Abstract

The invention belongs to the field of metallurgy, and specifically relates to a method for extracting metal lead and zinc through bottom blowing oxygen-enriched self-heating smelting-electric smeltingdirect reduction. The method comprises the following steps of preparing a mixture from lead-zinc sulfide ore, lead-zinc oxidized ore, flux calcium oxide and silicon dioxide, feeding the mixture intoa bottom blowing oxidation furnace, introducing high-pressure oxygen at the temperature of 950-1200 DEG C in the furnace, and smelting to obtain SO2 flue gas, lead liquid and oxidized slag melt; feeding the oxidizing slag melt into an electric smelting reduction furnace, adding coal, silicon dioxide, calcium oxide and a cold material containing lead and zinc oxides, and heating and reducing to obtain lead liquid, reducing slag and zinc-containing flue gas; and introducing the zinc-containing flue gas into an efficient condenser, and condensing to obtain lead liquid, zinc liquid and CO gas. According to the method, metal zinc can be obtained while the metal lead product is obtained, the additional value of the product is increased, and the recovery rate of lead and zinc is increased. The method has the advantages that the raw material applicability is wide, the fuel consumption is reduced, and the waste gas emission is reduced.

Description

technical field [0001] The invention belongs to the field of metallurgy, and in particular relates to a method for extracting metal lead and zinc through bottom-blown oxygen-enriched autothermal smelting-electric melting direct reduction. Background technique [0002] my country is the world's largest producer and consumer of lead and zinc. The smelting of zinc is mainly by hydrometallurgy, while the production of lead is mainly by pyrometallurgy. Lead ore raw materials are usually symbiotic with zinc, containing about 3% to 15% zinc and 3% to 50% lead. Before 2002, the pyrometallurgy process of lead was mainly sintering roasting-blast furnace smelting process; after 2009, it was replaced by the new technology of "bottom-blown oxidation smelting-liquid high-lead slag smelting reduction-fuming zinc extraction" technology, becoming At present, the main process of my country's lead smelting technology. The technological process of this technology is mainly as follows: the lead...

Claims

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Application Information

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IPC IPC(8): C22B4/04C22B7/02C22B7/04C22B13/02C22B19/20C22B19/30
CPCC22B4/04C22B7/001C22B7/02C22B7/04C22B13/02C22B13/025C22B19/20C22B19/30Y02P10/20
Inventor 何秋安何志军陈会成刘新建李全清魏瑞敏
Owner 岷山环能高科股份公司
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