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A method for recovering metallic lead from lead sulfate slag

A technology of lead sulfate and metal lead, which is applied to the improvement of process efficiency, instruments, electrolytic components, etc., can solve the problems of inability to fully utilize metals, limited scope of application, and potential safety hazards, and achieve the adaptability of raw materials and the availability of raw materials High adaptability and low cost effect

Active Publication Date: 2022-03-11
赵坤
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0025] The purpose of the present invention is to solve the existing problems of high energy consumption, high cost, heavy pollution, limited scope of application, potential safety hazards and inability to fully utilize metal when recovering metallic lead from lead-containing materials such as lead sulfate slag. A new method for recovering metallic lead from lead sulfate slag

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0084] A method for recovering metallic lead from lead-containing materials such as lead sulfate slag, comprising the following steps:

[0085] 1) Chlorination leaching process

[0086] 1.1) In the 10L reaction tank, according to the mass concentration of NaCl is 220g / L, CaCl 2 The mass concentration is 26g / L, and FeCl 3 The mass concentration is 8.7g / L, configure 6L pre-chlorination leaching solution, start mechanical stirring to make it evenly mixed;

[0087] 1.2) The temperature of the above chlorinated leaching solution was raised to 85° C., and 600 g of lead sulfate slag (dry basis) was added; after reacting for 3 hours, solid sodium hydroxide (99% of industrial grade) was added to adjust the pH value of the solution to 7;

[0088] 1.3) After the pH value is adjusted to 7, suction filter while it is hot to obtain 708g of filter residue (water content 26%) and 5.2L of filtrate, wherein the filter residue is washed and stored;

[0089] 1.4) After natural cooling of the fil...

Embodiment 2

[0111] A method for recovering metallic lead from lead-containing materials such as lead sulfate slag, comprising the following steps:

[0112] 1) Chlorination leaching process

[0113] 1.1) In the 10L reaction tank, according to the mass concentration of NaCl is 200g / L, CaCl 2 The mass concentration is 25g / L, and FeCl 3 The mass concentration is 10g / L, configure 6L pre-chlorination leaching solution, start mechanical stirring to make it evenly mixed;

[0114] 1.2) The temperature of the above-mentioned pre-chlorination leaching solution was raised to 90° C., and 600 g of lead sulfate slag (dry basis) was added; after reacting for 3 hours, solid sodium hydroxide (industrial grade 99%) was added to adjust the pH value of the solution to 7;

[0115] 1.3) After the pH value was adjusted to 7, suction filtered while it was hot to obtain 659.6g of filter residue (water content 24%) and 6.24L of filtrate, wherein the filter residue was washed and stored;

[0116] 1.4) After natur...

Embodiment 3

[0138] A method for recovering metallic lead from lead-containing materials such as lead sulfate slag, comprising the following steps:

[0139] 1) Chlorination leaching process

[0140] 1.1) In the 10L reaction tank, according to the mass concentration of NaCl is 200g / L, CaCl 2 The mass concentration is 26g / L, and FeCl 3 The mass concentration is 6g / L, configure 7L chlorination leaching pre-liquid, start mechanical stirring to make it evenly mixed;

[0141]1.2) The temperature of the above-mentioned pre-chlorination leaching solution was raised to 90° C., and 1000 g of lead sulfate slag (dry basis) was added; after reacting for 3 hours, solid sodium hydroxide (industrial grade 99%) was added to adjust the pH value of the solution to 7;

[0142] 1.3) After the pH value is adjusted to 7, suction filter while hot to obtain 1296.8g of filter residue (water content 30%) and 6.03L of filtrate, wherein the filter residue is washed and stored;

[0143] 1.4) After natural cooling of...

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Abstract

The invention provides a method for recovering metallic lead from lead-containing materials such as lead sulfate slag, which solves the problems of high energy consumption, high cost, large pollution, and poor application when recovering metallic lead from lead-containing materials such as lead sulfate slag. Issues with limited range, safety hazards, and inability to take full advantage of metal. The method recovers lead in lead-containing materials such as lead sulfate slag according to the following steps: (1) chlorination leaching process; (2) sodium carbonate conversion process; 3) methanesulfonic acid leaching process; 4) electrowinning process; 5) melting and casting process.

Description

technical field [0001] The invention relates to the technical field of secondary lead, in particular to a method for recovering metallic lead from lead sulfate slag. Background technique [0002] At present, a large amount of lead sulfate slag (that is, lead-containing materials such as lead sulfate, lead sulfide, lead oxide, lead carbonate, lead chloride, lead silicofluorate, etc.) will be produced in the process of copper smelting and lead-zinc smelting. Random stacking brings many problems, and there is a huge environmental risk. First, a large amount of land is used as a storage yard, occupying valuable land resources; second, although the types of mineral resources in my country are relatively complete, there are many symbiotic and associated mines, few single mines, many lean mines, and few easy-to-beneficiation mines; These characteristics and the current level of smelting technology determine that in the metallurgical and chemical production process, only a part of t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B13/00C22B7/04C22B1/11C25C1/18C25C7/02
CPCC22B13/045C22B7/04C22B1/11C22B7/007C25C1/18C25C7/02Y02P10/20
Inventor 赵坤
Owner 赵坤
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