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All-wet method for extracting lead from lead plaster and lead sulfide concentrate

A lead sulfide, all-wet technology, applied in the field of lead extraction, can solve problems such as environmental pollution, and achieve the effects of reducing use costs, good stability, and being beneficial to environmental protection

Active Publication Date: 2017-05-17
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0020] Aiming at the problems such as environmental pollution in the existing waste lead-acid battery lead paste and lead sulphide concentrate smelting process, the purpose of the present invention is to propose a green and efficient method for using the waste lead-acid battery lead paste and lead sulphide concentrate Method for extracting lead from lead sulfide concentrate

Method used

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  • All-wet method for extracting lead from lead plaster and lead sulfide concentrate
  • All-wet method for extracting lead from lead plaster and lead sulfide concentrate
  • All-wet method for extracting lead from lead plaster and lead sulfide concentrate

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] The phases of the lead sulfate material used in the test are shown in Table 1, and the chemical composition of the lead sulfide concentrate is shown in Table 2.

[0059] Table 1 lead sulfate material lead phase analysis / %

[0060] Phase Pb / PbSO 4

Pb / PbO Pb / PbO 2

Pb T Pb

content / % 30.40 12.90 25.63 ＜1 72.90

[0061] Table 2 Chemical composition of lead sulfide concentrate

[0062] element Pb S Fe Ag Element / % 48.71 17.32 7.76 0.0057

[0063] Get lead sulfate material 200g (its lead material phase is as table 1), and the carbonate consumption in the carbonate solution of preparation is 1.3 times of theoretical amount, press material and carbonate solution in beaker by liquid-solid ratio 4:1mL / g Mix and mix in medium, stir at 200r / min, convert at a temperature of 85°C for 1.0h; filter and wash until no sulfate exists in the washing liquid. Take the material after desulfurization and conversion, ad...

Embodiment 2

[0065] The phases of the lead sulfate material used in the test are shown in Table 1, and the chemical composition of the lead sulfide concentrate is shown in Table 2.

[0066]Get lead sulfate material 400g (its lead phase is as table 1), and the carbonate consumption in the carbonate solution of preparation is 1.5 times of theoretical amount, by liquid-solid ratio 6:1mL / g material and carbonate solution are in beaker and put it into a water bath at a stirring speed of 200r / min, transform at a temperature of 25°C for 2.5h; filter and wash until no sulfate exists in the lotion. Take the desulfurized conversion material, add the material to the acidic leachate (containing 1.3mol / L of free methanesulfonic acid and 30g / L of lead methanesulfonate) according to the liquid-solid ratio of 5:1mL / g, and stir at a stirring speed of 400r / min. Leach at a temperature of 75°C for 2.5 hours, and obtain filter residue and neutral leachate after separation; lead sulfide concentrate is subjected...

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Abstract

The invention discloses an all-wet method for extracting lead from lead plaster and lead sulfide concentrate. The method comprises the steps that the lead plaster of a waste lead acid accumulator and a carbonate solution are subjected to a desulfurization conversion reaction, solid-liquid separation is conducted, a sulfate solution and desulfurization conversion materials are obtained, the desulfurization conversion materials are subjected to neutral leaching by means of a methanesulfonic acid solution, and neutral leachate and neutral leaching residues are obtained through liquid-solid separation; the neutral leachate and waste sulfate electrolyte are blended for preparing sulfate electrolyte which is then subjected to lead electrodeposition, and a lead plate and waste lead electrolyte are obtained; and the neutral leaching residues serve as an oxidizing agent, the lead sulfide concentrate is subjected to acid leaching by means of the waste sulfate electrolyte, liquid-solid separation is conducted, acid leachate and acid leaching residues are obtained, and the acid leachate returns for application to neutral leaching next time. By adoption of the method, the lead is efficiently extracted, the leachate and the sulfate electrolyte are recycled, no waste liquid is generated, and the requirement for environment protection is met.

Description

technical field [0001] The present invention relates to a method for extracting lead from lead paste and lead sulfide concentrate, in particular to a green and clean method for recovering lead from lead paste and lead sulfide concentrate through a full wet method, which belongs to non-ferrous metallurgy and The field of resource regeneration. Background technique [0002] Methanesulfonic acid has many uses. It is a raw material for medicine and pesticides. It can be used as a dehydrating agent, a paint curing accelerator, and a fiber treatment agent. In recent years, it has been widely used as a solvent for electroplating solutions. Metal methanesulfonate is widely used in the field of electrochemical deposition, and the applications related to the surface finishing industry include: replacing fluoroboric acid and fluoroborate in tin, lead and tin-lead alloy electroplating; metal wire and steel bar plating Tin; metal finishing of silver, copper, nickel and palladium; remova...

Claims

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Application Information

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IPC IPC(8): C22B7/00C22B3/16C22B3/04C25C1/18
CPCC22B3/04C22B3/165C22B7/006C25C1/18Y02P10/20
Inventor 杨声海孙彦伟林文荣吴彦增陈永明何静唐朝波
Owner CENT SOUTH UNIV
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