Method for recycling metal lead from lead-containing material such as lead sulfate slag

A technology of lead sulfate and metal lead, which is applied to the improvement of process efficiency, photographic technology, electrodes, etc., can solve the problems of inability to fully utilize metals, hidden safety hazards, and limited scope of application, so as to achieve the adaptability of raw materials and easy availability of raw materials. Strong adaptability and the effect of avoiding pollution

Active Publication Date: 2020-03-27
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-containing materials such as 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 fi...

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 3The 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 recycling metal lead from a lead-containing material such as lead sulfate slag. The problems that when metal lead is recycled from a lead-containing material such as lead sulfate slag in the prior art, energy consumption is high, cost is high, pollution is severe, the application range is limited, potential safety hazards exist, and metal cannot be sufficientlyutilized are solved. According to the method, the lead in the lead-containing material such as the lead sulfate slag is recycled in the following steps of (1) a chlorination leaching process; (2) a sodium carbonate conversion process; (3) a methane sulfonic acid leaching process; (4) an electrodeposition process; and (5) a melting-casting process

Description

technical field [0001] The invention relates to the technical field of regenerated lead, in particular to a method for recovering metallic lead from lead-containing materials such as 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 ...

Claims

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Application Information

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Patent Type & Authority Applications(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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