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A method for recovering metallic lead from solid lead oxide

A technology of lead oxide and metal lead, which is applied in the direction of photography technology, equipment, photography auxiliary technology, etc., to achieve the effects of low power consumption, friendly working environment and reduced production cost

Active Publication Date: 2017-05-10
SHENYANG RES INST OF NONFERROUS METALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the above-mentioned deficiencies existing in the fire method and the existing wet lead smelting technology, aiming at the existing problems of recovering lead from lead chloride, a method for recovering metal from lead chloride conversion product-lead oxide is proposed. lead method

Method used

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Experimental program
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Effect test

Embodiment 1

[0027] Firstly, the chlorination leaching of the lead sulfide concentrate is carried out, and the leaching solution is cooled and crystallized to obtain solid lead chloride. Secondly, carry out the first step transformation with solid lead chloride, calcium oxide and water according to a certain liquid-solid ratio, the technical condition of the first step transformation of lead chloride is: the mass ratio of lead chloride and calcium oxide=9:1, The liquid-solid ratio is 4:1, the conversion temperature is 60°C, and the reaction time is 90 minutes. After the reaction is completed, the liquid-solid separation is carried out; the conversion slag PbOHCl obtained in the first step is converted in a certain concentration of sodium hydroxide solution for the second step conversion. After the reaction is completed, liquid-solid separation is carried out to obtain conversion slag PbO and sodium chloride solution. The technical conditions for the second step conversion are: the mass rati...

Embodiment 2

[0032] Firstly, the chlorination leaching of the lead sulfide concentrate is carried out, and the leaching solution is cooled and crystallized to obtain solid lead chloride. Secondly, carry out the first step transformation with solid lead chloride, calcium oxide and water according to a certain liquid-solid ratio, the technical condition of the first step transformation of lead chloride is: the mass ratio of lead chloride and calcium oxide=9:1, The liquid-solid ratio is 5:1, the conversion temperature is 70°C, and the reaction time is 120 minutes. After the reaction is completed, the liquid-solid separation is carried out; the conversion slag PbOHCl obtained in the first step is converted in a certain concentration of sodium hydroxide solution for the second step conversion. After the reaction is completed, liquid-solid separation is carried out to obtain the conversion slag PbO and sodium chloride solution. The technical conditions for the second step conversion are: the mass...

Embodiment 3

[0037]Firstly, the chlorination leaching of the lead sulfide concentrate is carried out, and the leaching solution is cooled and crystallized to obtain solid lead chloride. Secondly, solid lead chloride, calcium oxide and water are carried out the first step conversion by certain liquid-solid ratio, and the technical condition of lead chloride first step conversion is: the mass ratio=10:1 of lead chloride and calcium oxide, The liquid-solid ratio is 4:1, the conversion temperature is 60°C, and the reaction time is 120 minutes. After the reaction is completed, the liquid-solid separation is carried out; the conversion slag PbOHCl obtained in the first step is converted in a certain concentration of sodium hydroxide solution for the second step conversion. After the reaction is completed, liquid-solid separation is carried out to obtain the conversion slag PbO and sodium chloride solution. The technical conditions for the second step conversion are: the mass ratio of basic lead c...

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Abstract

The invention relates to a method for recovering metal lead from solid lead oxide. The method is characterized by comprising the following steps: (1) subjecting vulcanized lead concentrate to chlorination leaching, and crystallizing the leachate to obtain solid lead chloride; (2) carrying out first conversion on the solid lead chloride by using calcium oxide to generate basic lead chloride PbOHCl, and then carrying out second conversion between PbOHCl and a sodium hydroxide solution to obtain solid lead oxide; (3) preparing a sodium hydroxide solution as the electrolyte, mixing a proper amount of electrolyte and lead oxide, stirring to obtain paste, evenly painting the paste on a negative electrode plate, installing the negative electrode plate and a positive electrode plate into an electrolysis tank, and carrying out electrolysis; (4) after the electrolysis, peeling off the sponge lead from the negative electrode plate, pressing the sponge lead into balls, and casting the lead balls into lead ingots. The provided method can solve the problems existing in the process of recovering lead from chlorinated leachate of vulcanized lead concentrate through a conversion-solid electrolysis technology, and has the advantages of friendly operation environment, strong operability, high current efficiency, and low production cost.

Description

technical field [0001] The invention relates to a method for hydrometallurgy, in particular to a method for extracting and recovering metallic lead from lead oxide by using solid-phase electrolytic reduction technology, and belongs to the technical field of hydrometallurgy. Background technique [0002] There are two kinds of lead smelting methods: fire method and wet method. At present, the fire method is the main method in the world, and the wet method is still in the experimental research stage. With increasingly stringent environmental protection and increasingly fierce competition in the international market, countries around the world are trying to eliminate SO 2 A large amount of new lead smelting process research and development work has been carried out, and direct lead smelting methods such as QSL, Kivcet, Kaldo, Ausmelt, ISA, and SKS have been developed successively. These new technologies for smelting lead have canceled the sintering process and fundamentally so...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25C1/18C25C7/00
CPCC25C1/18C25C7/00
Inventor 王德全李淑梅刘凯华丛自范
Owner SHENYANG RES INST OF NONFERROUS METALS
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