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Method for producing metallic lead with solvent extraction electrowinning process

A metal lead and electrowinning technology, applied in the direction of improvement of process efficiency, photographic process, photographic auxiliary process, etc., can solve the problems of inapplicability, difficulty in anion separation, etc., and achieve low production cost, strong adaptability of raw materials, and low investment in equipment Effect

Inactive Publication Date: 2018-11-06
桐乡市思远环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method prepares and prepares electric lead, at first owing to adopt lead powder to remove impurity, some alkaline metals remaining in the solution and metal ions such as zinc can not be well removed, cause the recycling use problem of solution and the quality of electric lead can only be limited. Reach more than 97%, can not reach more than 99.94%; secondly, if zinc is contained in the raw material, zinc will dissolve under alkaline conditions, then this method will not be applicable; in addition, if some soluble salts are contained in the raw material, the The anions of will go into solution, and the separation of anions will be very difficult

Method used

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  • Method for producing metallic lead with solvent extraction electrowinning process
  • Method for producing metallic lead with solvent extraction electrowinning process
  • Method for producing metallic lead with solvent extraction electrowinning process

Examples

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Embodiment 1

[0039] The lead-containing slag, lead-containing sludge, and lead-zinc materials containing 20% ​​lead are leached and filtered with hydrochloric acid to obtain a lead-containing leachate, which is mixed with the extractant for extraction and shaken for 3 minutes to obtain lead-ion-loaded organic, After the organic matter is washed with an acidic washing solution, it is stripped with a stripping agent to obtain a rich solution containing 150 g / L of lead. The lead-rich solution is degreased by activated carbon to obtain a pre-electrodeposition solution with an oil content of less than 5 ppm. The pre-electrowinning solution obtains metallic lead through electrowinning. After extracting and separating other metals such as copper, cadmium, zinc, cobalt and nickel, the lead extraction raffinate is returned to leaching for recycling. In the above-mentioned embodiment, the acid washing solution is composed of lead acetate and nitric acid, and the stripping agent is composed of nitri...

Embodiment 2

[0041] After leaching and separating the lead sulfate-containing material through a sodium carbonate solution, sodium sulfate solution and lead carbonate precipitation are obtained respectively, the sodium sulfate solution is evaporated and crystallized to prepare Glauber's salt, and the lead carbonate is leached and filtered with hydrochloric acid to obtain a lead-containing leachate; The lead-containing leachate was mixed and extracted with an extractant, and shaken for 5 minutes to obtain an organic substance loaded with lead ions. After the organic substance was washed with an acidic washing solution, it was stripped with a stripping agent to obtain a rich solution containing 150 g / L lead. After the lead-rich solution is degreased by activated carbon, a lead pre-electrowinning solution containing less than 10 ppm of oil is obtained, and the pre-electrowinning solution obtains metallic lead through electrowinning. After extracting and separating other metals such as copper, ...

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Abstract

The invention discloses a method for producing metallic lead with a solvent extraction electrowinning process. The method comprises steps as follows: a), a lead-containing material is leached and filtered by a lead dissolving solution capable of generating soluble lead salt, and a lead-containing leaching solution is prepared; b), the lead-containing leaching solution and an extraction agent are subjected to mixed extraction and layering, and lead ion supported organic matter and raffinate are obtained; c), the lead ion supported organic matter is washed with an acidic washing solution, and washed organic matter and washed water are obtained; d), the washed organic matter is subjected to reverse extraction with a stripping agent, and regenerated organic matter and a reverse extracted richsolution are obtained; e), the regenerated organic matter returns to the step b) for recycling; f), the reverse extracted rich solution is subjected to air flotation and activated carbon oil removal,and a lead electrowinning precursor solution is obtained; g), the lead electrowinning precursor solution is subjected to electrowinning, and metallic lead is obtained. With the adoption of the method,lead is separated and extracted from waste lead batteries, lead zinc ore, lead oxide ore, low-grade complex lead-containing waste residues and lead-containing sludge, and the method has the advantages of being simple in process, low in equipment investment, low in operating cost, clean and efficient and the like.

Description

technical field [0001] The invention relates to a process for extracting and separating lead, in particular to a method for producing metallic lead by using a solvent extraction electrowinning process. Background technique [0002] At present, almost all lead smelting methods are pyrometallurgical smelting. To obtain refined lead, crude lead is often obtained through pyrometallurgical smelting, and then the obtained crude lead is refined and electrolyzed to obtain refined lead. Using this method to prepare refined lead not only has a long process and high energy consumption, but also requires a large investment in equipment and high production costs. [0003] In recent years, many scholars have conducted research on the hydrometallurgy of lead, and developed a process of alkaline leaching, impurity removal, and electrowinning to prepare electrical lead. This method uses sodium hydroxide alkaline leaching to dissolve lead to form Lead-containing solution, then use lead powde...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/04C22B3/26C22B3/44C22B7/00C25C1/18C22B13/00
CPCC22B3/04C22B3/44C22B7/006C22B13/04C22B13/045C25C1/18C22B3/26Y02P10/20
Inventor 蒋航宇朱富龙赵尹蒋雅竹
Owner 桐乡市思远环保科技有限公司
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