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Process for producing basic lead carbonate

A lead carbonate and process technology, applied in the field of non-ferrous metal recycling process, can solve problems such as waste of resources, environmental pollution, economic loss, etc., and achieve the effects of saving resources, optimizing processes, and reducing pollution

Inactive Publication Date: 2010-06-09
JIANGXI RARE EARTH & RARE METALS TUNGSTEN GRP HLDG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] At present, the development and production of many mineral resources in my country will produce lead waste residue. If it cannot be used rationally, it will not only waste resources, cause economic losses, but also bring huge pollution to the environment.

Method used

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  • Process for producing basic lead carbonate
  • Process for producing basic lead carbonate
  • Process for producing basic lead carbonate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Such as figure 1 As shown, the "redundant slag" of bismuth refined by fire method is lead chloride slag (PbCl 2 ), neutralization slag (NaOH) as raw material, the technological process of producing low-impurity basic lead carbonate, the main steps include:

[0037] (1) Process of soaking and neutralizing slag to obtain sodium hydroxide solution

[0038] Such as figure 2 As shown, after the neutralization slag 10 is crushed, it is added to the immersion tank filled with clean water 11, the agitator is turned on, soaked for 1-2 hours, clarified, and the supernatant (sodium hydroxide solution) 13 is stored for use. The sinker 12 is dried and directly returned to the refining pot for smelting.

[0039] (2) Leaching lead chloride slag, filtration process

[0040] Such as image 3 As shown, the filtrate 30, the lead chloride slag crushed to about 200 mesh are fed into the reaction tank, and the sodium chloride concentration of the solution in the reaction tank is adjust...

Embodiment 2

[0047] Such as figure 1 As shown, the "redundant slag" of bismuth refined by fire method is lead chloride slag (PbCl 2 ), neutralization slag (NaOH) as raw material, the technological process of producing low-impurity basic lead carbonate, the main steps include:

[0048] (1) Process of soaking and neutralizing slag to obtain sodium hydroxide solution

[0049] Such as figure 2 As shown, after the neutralization slag 10 is crushed, it is added to the immersion tank equipped with clear water 11, the agitator is turned on, soaked for 1.5 hours, clarified, and the supernatant (sodium hydroxide solution) 13 is stored for use. The sinker 12 is dried and directly returned to the refining pot for smelting.

[0050] (2) Leaching lead chloride slag, filtration process

[0051] Such as image 3 As shown, the filtrate 30, the lead chloride slag crushed to about 200 meshes are fed into the reaction tank, and the sodium chloride concentration of the solution in the reaction tank is ad...

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Abstract

The invention relates to a process for producing basic lead carbonate, which comprises the following steps: (1) soaking and neutralizing slag to obtain solution of sodium hydroxide, (2) leaching lead chloride slag and filtering, (3) alkali neutralization, filtering and washing, and (4) carbonate conversion, crystallization, filtering and washing. The process uses residual slag of fire refining bismuth as a raw material, optimizes smelting production technology of blast furnace smelting, electrolysis of lead-bismuth alloy, and fire refining to ensure that smelting slag of bismuth can be better treated and utilized, and saves resources. In the process of the invention, lead circulates in a closed system so as to reduce environmental pollution.

Description

technical field [0001] The invention relates to a recovery process of nonferrous metals, in particular to a process for producing basic lead carbonate. [0002] The term "Huangdan" is a common name for lead oxide, molecular formula: PbO; [0003] The term "low impurity basic lead carbonate" refers to the impurity elements controlled in (mass fraction): Bi: <0.3%; Cu: <0.05%; Ag: <0.008%; Zn: <0.5%; Cl: <1% alkali lead carbonate; [0004] Term " economical type ammonium bicarbonate " is that in the process that basic lead chloride is converted into basic lead carbonate, the present invention uses relatively cheap ammonium bicarbonate to replace commonly used ammonium carbonate; [0005] The term "neutralization slag" refers to the smelting slag produced in the process of neutralizing the chlorinated coarse bismuth, which is composed of sodium hydroxide, sodium chloride, metal bismuth, etc.; [0006] The term "lead chloride slag" refers to the smelting slag pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G21/14
CPCC22B7/04C01G21/14Y02P10/20B01J19/18B09B3/00
Inventor 林国荣余欢荣李继红
Owner JIANGXI RARE EARTH & RARE METALS TUNGSTEN GRP HLDG CO LTD
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