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Suspension electrolysis method for lead sulfate

A technology of lead sulfate and electrolyte, applied in the field of wet lead smelting, can solve the problems of unusable by-products, large consumption of reagents, crossover, etc., and achieve the effects of large-scale popularization and application, low material consumption and high efficiency

Inactive Publication Date: 2017-03-15
BEIJING GENERAL RES INST OF MINING & METALLURGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

From the source, it solves the problems of crossover of different solution systems, large consumption of reagents, and unusable by-products in the traditional wet lead extraction process, and completely overcomes the problem of clean, economical and efficient recovery of lead in various lead-zinc materials. Provide support for the green and clean utilization of various lead and zinc materials

Method used

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  • Suspension electrolysis method for lead sulfate
  • Suspension electrolysis method for lead sulfate
  • Suspension electrolysis method for lead sulfate

Examples

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Effect test

Embodiment 1

[0034] In a kind of method of lead sulfate suspension electrolysis, with PbSO 4 90% lead-containing materials are used as raw materials, and lead sulfate slurry is obtained by slurrying waste electrolyte, wherein the solid concentration is 15%, and the H 2 SO 4 Concentration 120g / L; lead sulfate slurry in 1m 3 The speed of / h is continuously added to the suspension electrolyzer, and the cathode current density is 250A / m 2 , the lead sulfate particles are reduced and precipitated at the cathode to 113kg of lead powder, and the lead powder is washed, filtered and compacted to form rough lead; the anode produces sulfuric acid and oxygen, and the waste electrolyte contains H 2 SO 4 Up to 174g / L. Open 32% of the waste electrolyte, and add the same volume of deionized water to the remaining 68% of the waste electrolyte, and the concentration of sulfuric acid in the electrolyte is 118g / L; for SiO 2 , Fe 2 o 3 and a small amount of incompletely reacted PbSO 4 , filter, and t...

Embodiment 2

[0036] In a kind of method of lead sulfate suspension electrolysis, with PbSO 4 60% lead-containing materials are used as raw materials, and lead sulfate slurry is obtained by slurrying waste electrolyte, wherein the solid concentration is 20%, and the H 2 SO 4 Concentration 150g / L; lead sulfate slurry in 1m 3 The speed of / h is continuously added to the suspension electrolyzer, and the cathode current density is 230A / m 2 , the lead sulfate particles are reduced at the cathode to precipitate 95kg of lead powder, and the lead powder is washed, filtered and compacted to form rough lead; the anode produces sulfuric acid and oxygen, and the waste electrolyte contains H 2 SO 4 Up to 196g / L. About 24% of the waste electrolyte is opened, and the same volume of deionized water is added to the remaining 76% of the waste electrolyte. The concentration of sulfuric acid in the electrolyte is 149g / L; Mainly SiO 2 , Fe 2 o 3 and a small amount of incompletely reacted PbSO 4 , filt...

Embodiment 3

[0038] In a kind of method of lead sulfate suspension electrolysis, with PbSO 4 80% lead-containing materials are used as raw materials, and lead sulfate slurry is obtained by slurrying waste electrolyte, wherein the solid concentration is 18%, and the H 2 SO 4 Concentration 140g / L; lead sulfate slurry in 1m 3 The speed of / h is continuously added to the suspension electrolyzer, and the cathode current density is 250A / m 2 120kg of lead powder is precipitated by reduction of lead sulfate particles at the cathode, and the lead powder is washed, filtered and compacted to form rough lead; the anode produces sulfuric acid and oxygen, and the waste electrolyte contains H 2 SO 4 Up to 197g / L. About 30% of the waste electrolyte is opened, and the same volume of deionized water is added to the remaining 70% of the waste electrolyte. The concentration of sulfuric acid in the electrolyte is 142g / L; Mainly SiO 2 , Fe 2 o 3 and a small amount of incompletely reacted PbSO 4 , filt...

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Abstract

The invention discloses a suspension electrolysis method for lead sulfate, and belongs to the field of wet process lead smelting. For a lead-containing material taking PbSO4 as a principal thing, the invention develops a novel suspension electrolysis method for lead sulfate. The lead sulfate-containing material is continuously added into a suspension electrolysis bath after being pulpified with dilute sulphuric acid, and solid particles in electrolysis slurry are uniformly distributed in the electrolysis bath under the action of stirring paddles; lead powder is directly separated out from lead sulfate particles at a positive pole, and the lead powder is cast into lead bullion after being washed, filtered and briquetted; sulfuric acid and oxygen are generated at a positive pole; the recycling for lead and the sulfuric acid is realized at the same time. The method solves the problems that different solution systems are crossed, the consumption of reagents is high and byproducts cannot be used in a traditional wet process lead extraction technology from the source, thoroughly overcomes the difficulty of clean, economic and efficient recycling for lead in various lead and zinc materials, and can provide support for green and clean utilization of all lead and zinc materials.

Description

technical field [0001] The invention belongs to the technical field of wet lead smelting, and relates to a method for electrolyzing lead sulfate suspension. Background technique [0002] Lead in lead-zinc oxide ore is enriched in the leaching residue after wet zinc leaching, and almost all of it is converted into lead sulfate; lead in zinc roasting is enriched in the high leaching residue after sulfuric acid leaching, and almost all of it is converted into lead sulfate; Other zinc-containing materials, such as iron and steel plant smoke, copper smelting plant smoke, etc., after fire reduction and volatilization, zinc oxide also contains lead. After further zinc leaching, lead also exists in the leaching residue in the state of lead sulfate; The main components of the selected lead slime are lead sulfate and lead oxide. [0003] The lead content of the above-mentioned various lead sulfate-containing materials is generally 10-60%. In order to reclaim lead from the above-menti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25C5/00
CPCC25C5/00
Inventor 蒋开喜王海北赵磊刘三平魏帮
Owner BEIJING GENERAL RES INST OF MINING & METALLURGY
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