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Process for direct reduction of lead from high content of liquid lead dreg in bottom blowing furnace

A technology of high-lead slag and bottom-blown furnace, applied in the field of direct reduction of lead smelting with high-lead slag in bottom-blown furnace, can solve problems such as difficult operation in the reduction section, energy waste, high-tech level requirements, etc., and achieve simple and reliable production process, The effect of reducing equipment investment and small flue gas volume

Inactive Publication Date: 2006-07-12
HENAN YUGUANG GOLD & LEAD
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Problems solved by technology

It first releases a large amount of heat in the liquid high-lead slag and cools it into a block, and then heats it in a blast furnace to melt it, which makes the heat in the liquid high-lead slag unable to be used directly, resulting in energy waste and making the production system huge. complex
At present, the internationally advanced QSL lead smelting technology enables oxidation-reduction to be carried out in the same furnace, but the huge investment and technology introduction fees and high technical level requirements make the operation of the reduction section very difficult
This set of technology introduced by our country's Baiyin Company is because the reduction section cannot be well controlled and has not been able to produce normally.

Method used

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  • Process for direct reduction of lead from high content of liquid lead dreg in bottom blowing furnace
  • Process for direct reduction of lead from high content of liquid lead dreg in bottom blowing furnace
  • Process for direct reduction of lead from high content of liquid lead dreg in bottom blowing furnace

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Embodiment Construction

[0010] Such as figure 1 As shown, the present invention directly injects the high-lead slag released from the oxidation smelting of the bottom blowing furnace into the reduction furnace for reduction smelting, simultaneously adds pulverized coal or coke into the reduction furnace, and feeds air, pulverized coal or The heat released by the reaction of coke and air and the produced CO gas react with the high-lead slag PbO injected into the reduction furnace to generate metallic lead.

[0011] Such as figure 1 , 2 , Shown in 3, 4, reduction furnace of the present invention adopts vertical furnace, also can adopt horizontal furnace, can also adopt horizontal and vertical combined furnace.

[0012] 1. Shaft furnace: the reduction furnace is a shaft furnace, including a furnace shell 5, a smoke outlet 1 arranged on the furnace shell 5, a coke inlet and a liquid high-lead slag melt inlet 2, and a furnace shell 5 The upper combustion-supporting tuyeres 3, the main tuyeres 4 arrange...

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Abstract

A process for refining lead directly from liquid-state high-Pb slag by reduction method features that the oxygen bottom-blow furnace-blast furnace is used for smelting lead by redox method, the molten high-Pb slag is directly poured in reducing furnace while the powdered coal or coke and air are introduced in the reducing furnace to generate metal lead by reaction. Its advantages are low cost, less energy consumption and less fume.

Description

technical field [0001] The invention belongs to the non-ferrous metal smelting industry, and in particular relates to a bottom-blown furnace high-lead slag liquid state direct reduction lead smelting method in which the high-lead slag melt is directly reduced in the liquid state when the oxygen bottom-blown furnace-blast furnace oxidation-reduction method is used for lead smelting method. Background technique [0002] At present, with the popularization and application of the more advanced oxygen bottom-blown furnace oxidation-blast furnace reduction smelting technology in China to replace the traditional sintering-blast furnace reduction smelting technology, the production environment of lead smelting has been greatly improved; but from the bottom-blown furnace oxidation The high-temperature and high-lead slag melt produced by smelting needs to be cooled and cast into blocks by the casting slag system, which is beneficial to the reduction smelting o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B13/00C22B7/04
CPCY02P10/20
Inventor 杨安国陈会成杨华锋赵传和
Owner HENAN YUGUANG GOLD & LEAD
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