Secondary lead smelting method

A secondary lead smelting and lead paste technology, which is applied in the field of secondary lead smelting, can solve the problems of high moisture content in desulfurized lead paste, long smelting cycle, high comprehensive energy consumption, etc., and achieve waste reuse, high direct recovery rate, comprehensive The effect of low energy consumption

Inactive Publication Date: 2014-10-08
扬州市华翔有色金属有限公司
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Problems solved by technology

[0002] At present, the production process of secondary lead includes pyrometallurgy process, solid-phase electrolytic reduction process and wet smelting process. Among them, pyrometallurgy process is more commonly used, but there is a problem that the desulfurization lead paste has high moisture content, and the lead paste enters the melting furnace kiln. Long smelting cycle, low direct yield, high comprehensive energy consumption, etc.

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Embodiment Construction

[0016] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings.

[0017] Such as figure 1 As shown, the secondary lead smelting method of the present invention includes crushing waste lead storage batteries, pre-desulfurizing, and sorting to obtain lead paste, lead grids and plastics, wherein the plastics are mainly polypropylene, heavy plastics and ABS.

[0018] The lead paste is dried in a drying kiln and then melted in a lead paste smelting furnace, and the generated flue gas is processed to obtain waste gas, which is returned to the drying kiln at the same time.

[0019] Among them, the main component of lead paste is lead carbonate, which contains about 20% water. If it is directly smelted, it needs to consume part of the fuel to remove the water therein. In the present invention, the lead paste can be press-filtered first, and then enter the drying kiln for drying. The high-temperature flue gas of abo...

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Abstract

The invention discloses a secondary lead smelting method which comprises the following steps: crushing scrap lead storage batteries, pre-desulfurizing, and separating to obtain lead plaster; and drying the lead plaster in a drying kiln, smelting in a lead plaster smelting furnace, treating the generated flue gas to obtain waste gas, and meanwhile, returning the waste gas into the drying kiln as a drying heat source. The hot waste gas obtained by waste heat recovery of the lead plaster smelting furnace and lead grid smelting furnace is used as the heat source for drying the lead plaster, thereby being beneficial to the smelting reaction of the lead plaster, enhancing the production efficiency and lowering the energy consumption; smoke dust obtained by treating the high-temperature flue gas generated in the lead plaster smelting furnace and lead grid smelting furnace is returned into the lead plaster smelting furnace to implement utilization of waste, and meanwhile, smelting slag generated by lead grid smelting and refining slag generated by refining also return to the lead plaster smelting furnace for treatment; and the complete treatment system has the advantages of high direct yield, low comprehensive energy consumption and low pollution, and implements optimized configuration of effective resources.

Description

technical field [0001] The invention relates to a method for smelting regenerated lead, in particular to the smelting of various regenerated lead raw materials such as waste lead-acid batteries. Background technique [0002] At present, the production process of secondary lead includes pyrometallurgy process, solid-phase electrolytic reduction process and wet smelting process. Among them, pyrometallurgy process is more commonly used, but there is a problem that the desulfurization lead paste has high moisture content, and the lead paste enters the melting furnace kiln. The smelting cycle is long, the direct yield is low, and the comprehensive energy consumption is high. Contents of the invention [0003] Purpose of the invention: the purpose of the invention is to provide a secondary lead smelting method that can improve production efficiency and recovery rate and reduce comprehensive energy consumption. [0004] Technical solution: The secondary lead smelting method desc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B13/02C22B7/00
Inventor 宋巍余德胜
Owner 扬州市华翔有色金属有限公司
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