A kind of method that reclaims lead, silver, indium from lead-silver slag

A technology of lead-silver slag and lead plate, which is applied in the fields of indium, lead and silver recycling, can solve the problems of hidden environmental hazards, low recovery rate, and high recovery cost, and achieve the effects of low environmental pollution, high recovery rate, and low recovery cost

Active Publication Date: 2019-11-26
云南云铜锌业股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of above-mentioned deficiencies in the prior art, the object of the present invention is to provide a kind of method that reclaims lead, silver, indium from lead-silver slag, aims to solve existing technology and reclaim lead, silver, indium from lead-aluminum slag to have recovery rate Low cost, high recycling cost, and potential environmental hazards

Method used

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  • A kind of method that reclaims lead, silver, indium from lead-silver slag
  • A kind of method that reclaims lead, silver, indium from lead-silver slag
  • A kind of method that reclaims lead, silver, indium from lead-silver slag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Put the lead and silver slag into the AlCl 3 250g / L, NaCl 90g / L, CaCl 2 70g / L, HCl 19.5g / L leaching agent, use HCl to control the pH of the system to 7.5, and carry out acid leaching treatment at 90°C for 180min to obtain the acid leaching solution;

[0048] Then put excess lead plates into the acid dipping solution at a temperature of 55°C to replace the sponge silver and obtain a replacement solution;

[0049] Then, at 75°C, put excess iron plates into the liquid after the first replacement to replace the sponge lead and obtain the liquid after the second replacement;

[0050] Then put excess aluminum plates into the liquid after the second replacement at a temperature of 20°C to replace the indium sponge and obtain the liquid after the third replacement;

[0051] The component analysis of sponge silver, sponge lead, sponge lead and the solution after three replacements shows that the direct recovery rate of silver is 98.54%, and the sponge silver contains 96.36% of...

Embodiment 2

[0053] Put the lead and silver slag into the AlCl 3 50g / L, NaCl 356g / L, CaCl 2 70g / L, HCl 19.5g / L leaching agent, use HCl to control the pH of the system to 7.3, and carry out acid leaching treatment at 85°C for 150min to obtain an acid leaching solution;

[0054] Then put excess lead plates into the pickling solution at a temperature of 50°C to replace the sponge silver and obtain a replacement solution;

[0055] Then, at 70°C, put excess iron plates into the liquid after the first replacement to replace the sponge lead and obtain the liquid after the second replacement;

[0056] Then put excess aluminum plates into the liquid after the second replacement at a temperature of 20°C to replace the indium sponge and obtain the liquid after the third replacement;

[0057] The component analysis of sponge silver, sponge lead, sponge lead and liquid after three replacements shows that the direct recovery rate of silver is 91.24%, and the sponge silver contains 90.35% silver; the...

Embodiment 3

[0059] Put the lead and silver slag into the AlCl 3 50g / L, NaCl 90g / L, CaCl 2 319g / L, HCl 19.5g / L leaching agent, use HCl to control the pH of the system to 7.8, and carry out acid leaching treatment at 95°C for 200min to obtain an acid leaching solution;

[0060] Then put excess lead plates into the pickling solution at 60°C to replace the sponge silver and obtain a replacement solution;

[0061] Then, at 80°C, put excess iron plates into the liquid after the first replacement to replace the sponge lead and obtain the liquid after the second replacement;

[0062] Then put excess aluminum plates into the liquid after the second replacement at a temperature of 30°C to replace the indium sponge and obtain the liquid after the third replacement;

[0063] The component analysis of sponge silver, sponge lead, sponge lead and liquid after three replacements shows that the direct recovery rate of silver is 97.34%, and the sponge silver contains 95.76% silver; the direct recovery ...

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Abstract

The invention discloses a method for recycling the lead, the silver and the indium from the lead-silver residues. The method for recycling the lead, the silver and the indium from the lead-silver residues comprises the steps that A acid leaching treatment is conducted on the lead-silver residues with a leaching agent, and then an acid leaching solution is obtained; B, a lead plate is placed in the acid leaching solution, sponge sliver is displaced out, and a primary post-displacement solution is obtained; C, an iron plate is placed in the primary post-displacement solution, sponge lead is displaced out, and secondary post-displacement solution is obtained; and D, an aluminum plate is placed in the secondary post-displacement solution, and sponge indium is displaced out. The method for recycling the lead, the silver and the indium from the lead-silver residues solves the problem that in the prior art for recycling the lead, the silver and the indium from the lead-aluminum residues, the recovery rate is low, the recycling cost is high, and potential environmental protection hazards exist.

Description

technical field [0001] The invention relates to the field of zinc smelting, in particular to a method for recovering lead, silver and indium from lead-silver slag. Background technique [0002] The lead and silver slag produced in zinc smelting mainly comes from the leaching process of zinc calcined sand, baked dust, zinc oxide fume and other materials. After the material is leached to extract zinc and other valuable metals, lead and silver are enriched in the final leaching residue due to their own physical and chemical properties. The lead-silver slag contains Ag, Pb, Zn, Cu, Fe and other valuable metals, and its chemical composition is complex. Generally, lead and silver slag can be added into lead concentrate as an auxiliary material in the lead smelting process, but zinc smelters often do not have a lead smelting system, so it is difficult to recover lead and silver slag by this method, although lead and silver slag can be recovered through a volatilization kiln Recyc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/00C22B13/00C22B11/00C22B58/00
CPCC22B7/007C22B11/044C22B13/045C22B58/00Y02P10/20
Inventor 曾鹏王秋银戴兴征陈国木王林张浩杰姜艳荣浩胡琼陶余彩张国莹张少博
Owner 云南云铜锌业股份有限公司
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