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Continuous lead smelting clean production process

A technology for cleaner production and production process, applied in the direction of improving process efficiency, can solve the problems of high implementation cost, reduce production links, environmental pollution, etc., and achieve the improvement of operating environment, reduction of production equipment and production links, and saving engineering investment. Effect

Inactive Publication Date: 2011-04-27
CHENZHOU CITY JINGUI SILVER IND CO LTD
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  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a clean production process for continuous lead smelting, which solves the serious environmental pollution and high implementation cost in the prior art, especially the utilization of high temperature melting and high lead slag heat enthalpy, further improves the operating environment and further saves energy The problem of reducing consumption; at the same time, it also provides a method for the reduction process of lead in molten high-lead slag and the fuming and volatilization process of valuable metals such as lead and zinc to be carried out in the same furnace, replacing the original blast furnace and fuming slag, canceling the casting slag, thereby reducing production links and saving engineering investment

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  • Continuous lead smelting clean production process

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Embodiment Construction

[0024] refer to figure 1 with figure 2 As shown, a continuous lead smelting clean production process, its specific production process steps: after batching lead concentrate or secondary lead raw materials and flux into charge, it is sent to the reaction smelting section from the feeding port 4 of the smelting equipment for smelting, from the oxygen Injection port 6 continuously injects oxygen-enriched gas into the molten pool of the smelting equipment; controls the melting temperature of the molten pool to be 1000-1200°C; 2 flue gas; containing high concentration of SO 2 The flue gas from the waste heat boiler and the electric precipitator collects the lead fume and sends it to the sulfuric acid system for acid production, and the acid production tail gas is emptied; the lead fume of the electric precipitator returns to the batching; the high-lead slag melt from the reaction smelting section The slag outlet 7 directly enters the reduction smelting section 2 through the chut...

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Abstract

The invention discloses a continuous lead smelting clean production process. The process comprises the following steps of: proportioning materials such as lead sulfide concentrate or a secondary lead raw material, a flux, lead dust and the like as required; performing a mixed granulation process; feeding a reaction smelting section of the entire equipment; smelting by an oxygen enriched bottom blowing method; directly feeding liquid-state high-lead slag into a reduction smelting section to perform reduction smelting so as to produce coarse lead; and directly feeding the reduced liquid-stage slag into a fuming section to perform fuming treatment so as to comprehensively recover valuable metals from the liquid-stage slag. Therefore, continuous clean production is realized in the true sense.

Description

technical field [0001] The invention relates to a process method for smelting lead in the nonferrous metal smelting industry, in particular to a clean production process for continuous lead smelting. Background technique [0002] At present, the processes used in my country's crude lead production mainly include the traditional "sintering-blast furnace reduction" lead smelting process and direct lead smelting methods such as oxygen bottom blowing-blast furnace reduction lead smelting method, QSL method, Kivicet method, ISA and Kaldo method. Due to the difficulty in recovering low-concentration sulfur dioxide flue gas produced in the traditional "sintering-blast furnace reduction" lead smelting process, limited by process conditions and equipment, SO 2 Unorganized emissions and lead smoke pollution cannot be effectively controlled, and the country has banned the use of this process in 2000. In recent years, as the country's environmental protection requirements have become i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B13/02
CPCY02P10/20
Inventor 谢兆凤张圣南季勇马辉曹永贵曹永德
Owner CHENZHOU CITY JINGUI SILVER IND CO LTD
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