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Oxygen bottom-blowing-blast furnace reduction process for lead smelting and apparatus therefor

An oxygen bottom blowing and smelting furnace technology, applied in the field of lead smelting method and devices used to realize the lead smelting method, can solve the problems of high implementation cost, environmental pollution, etc., achieve high labor efficiency, avoid escape, and invest in infrastructure effect of province

Active Publication Date: 2004-11-10
中国有色工程有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of serious environmental pollution and high cost of implementation in the prior art, and provide a lead smelting method with low implementation cost and good economic benefits that both exhaust tail gas and operating environment meet the national environmental protection requirements. its device

Method used

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  • Oxygen bottom-blowing-blast furnace reduction process for lead smelting and apparatus therefor
  • Oxygen bottom-blowing-blast furnace reduction process for lead smelting and apparatus therefor
  • Oxygen bottom-blowing-blast furnace reduction process for lead smelting and apparatus therefor

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Embodiment 1

[0042] In this embodiment, the lead raw material used is lead concentrate, and its main components in terms of total mass percentage are as follows:

[0043] Pb: 55%, S: 18%, SiO2: 6%, Fe: 11%, CaO 3.5%, Au 15g / t, Ag 800g / t.

[0044] Such as figure 1 As shown, the lead concentrate and flux are mixed and pelletized, and then sent to the bottom-blowing furnace for smelting, and the temperature of the molten pool of the smelting furnace is 1050°C. There are 3 oxygen injection inlets at the bottom of the smelting furnace, and industrial oxygen containing O295% (total volume percentage) is injected into the furnace through a quaternary oxygen lance. The oxygen lance is protected by nitrogen and demineralized water; the produced flue gas contains SO 212-15% (percentage of the total volume) is sent to the waste heat boiler to recover waste heat, and after electric dust collection, it is sent to the sulfuric acid system for two rotations and two suction to produce acid; the tail gas of a...

Embodiment 2

[0047] In this embodiment, mixed lead raw materials are used, and the main components in terms of total mass percentage are as follows:

[0048] Pb: 50%, S: 17%, SiO2: 7.5%, Fe: 9%, CaO 4.5%, Au 20g / t, Ag 500g / t.

[0049] Such as figure 1 As shown, after batching and granulating the lead concentrate and flux, it is sent to a bottom-blowing furnace for smelting, and the temperature of the molten pool of the smelting furnace is 1100°C. There are 4 oxygen injection inlets at the bottom of the smelting furnace, containing oxygen (O 2 ) 95% (total volume percentage) of industrial oxygen is sprayed into the furnace through a quaternary oxygen lance. The oxygen lance is protected by nitrogen and softened water; the produced flue gas contains SO 2 10-12% (percentage of the total volume) is sent to the waste heat boiler to recover waste heat, and after electric dust collection, it is sent to the sulfuric acid system for two rotations and two absorption for acid production; the tail gas of...

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Abstract

The invention provides a lead smelting method and device, and its characteristic: it adopts oxygen bottom blowing method to smelt lead-containing raw material, where the included angle alpha of the direction of oxygen spout with plumb line: 0 deg.<=alpha<=90 deg.. It has the advantages of environmental protection, low energy consumption, economic investment, low production cost, strong adaptability to raw materials, and high automation level.

Description

Technical field [0001] The invention relates to a method for smelting non-ferrous metals, in particular to a method for smelting lead and a device for realizing the method. Background technique [0002] The traditional lead smelting process includes a sintering pot-blast furnace process and a sintering machine-blast furnace process. Among them, the SO produced during the sintering process in the sintering pot-blast furnace process 2 The flue gas is completely emptied because it cannot be recycled, causing serious pollution to the atmospheric environment. At the same time, a large number of powder returning operations during the sintering process cause the low-altitude dispersion of lead fumes and lead to environmental pollution of lead fumes. In the sintering machine-blast furnace process, the flue gas produced contains SO 2 The concentration is very low. There is a domestic process that uses non-steady-state technology for single conversion and single absorption acid production,...

Claims

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Application Information

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IPC IPC(8): C22B13/02
Inventor 康南京刘振国蒋继穆陈汉荣王忠实高长春王建铭何德明李东波李初立朱让贤贺善持
Owner 中国有色工程有限公司
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