Technological method for comprehensively recovering valued metal such as indium and germanium from lead-zinc smoke

A process method and valuable metal technology, applied in the field of hydrometallurgy, can solve the problems of low comprehensive recovery rate, low resource utilization rate and high recovery cost

Active Publication Date: 2012-03-28
YUNNAN DONGCHANG METAL PROCESSING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] What the present invention is to solve is that the recovery of lead, zinc, germanium, indium and silver in the current rotary kiln has problems such a

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment 1: A kind of lead-zinc fume, its chemical composition is listed in the following table 1.

[0024] Table 1 :

[0025] chemical composition lead% Zinc % germanium% indium% Silver ug / g arsenic% content 42.14 32.04 1.275 0.36 327 4.65

[0026] (1) Weigh 200kg of lead-zinc dust, containing 42.14% lead, 32.04% zinc, 1.275% germanium, 0.36% indium, and 327g / t silver, and add 60kg of industrial Sulfuric acid, 200kg of water, start stirring, the rotating speed is 115 rev / min, after heating, stirring, aging and leaching for 1h, then add 300kg of water, under the condition of starting stirring, slowly add 200kg of hydrogen peroxide, after adding, heat up to 80-85°C, leaching for 4 hours, using a filter press to separate the solid-liquid residue from the liquid, and washing the leaching residue twice with a dilute sulfuric acid solution with a pH of 1.68. The second leaching was carried out under controlled conditions. After the t...

Embodiment 2

[0030] Embodiment 2: A kind of lead-zinc fume, its chemical composition is listed in the following table 1.

[0031] Table 1 :

[0032] chemical composition lead% Zinc % germanium% indium% Silver ug / g arsenic% content 38.70 21.85 0.47 0.58 187 3.26

[0033] (1) Weigh 200kg of lead-zinc dust, containing 38.70% lead, 21.85% zinc, 0.47% germanium, 0.58% indium, and 187g / t silver, and add 50kg of industrial Sulfuric acid, 200kg of water, start stirring, the rotating speed is 115 rev / min, after heating, stirring, aging and leaching for 1h, then add 400kg of water, under the condition of starting stirring, slowly add 100kg of hydrogen peroxide, after adding, heat up to 80-85°C, leaching for 3 hours, using a filter press to filter and separate the slag liquid, and washing the leaching residue twice with a dilute sulfuric acid solution with a pH of 1.56, transferring the leaching residue to the original leaching reactor, and proceeding according ...

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PUM

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Abstract

A technological method for comprehensively recovering valued metal such as indium and germanium from lead-zinc smoke. The present invention relates to the technical field of wet-process metallurgy, specifically a technological method for recovering valued metal such as lead, zinc, germanium, indium and silver from smoke volatilizing from a rotary kiln containing lead, zinc, germanium, indium and silver. The method of the present invention includes the separation and recovery of lead and silver, the extraction, separation and recover of indium, the distillation, separation and recover of germanium, and the recovery of zinc. The method of the present invention has too much comprehensive recovery rate, too much resource utilization rate and a relatively low recovery cost.

Description

technical field [0001] The invention relates to the technical field of hydrometallurgy, in particular to a process for recovering valuable metals such as lead, zinc, germanium, indium, silver, etc. method. Background technique [0002] Using rotary kiln to process various hydrometallurgy slags containing valuable metals such as lead, zinc, germanium, indium, silver, etc., including leaching slag produced in the process of hydrometallurgy zinc, hydrometallurgy copper, hydrometallurgy tin, etc. When purifying slag, neutralizing slag, etc., a large amount of smoke and dust rich in lead, zinc, germanium, indium, silver and other valuable metals will be produced. From hydrometallurgy slag to smoke, zinc, germanium, indium and other valuable Metals are often enriched by 3 to 10 times. These dusts generally contain 30 to 50% of lead, 20 to 45% of zinc, 0.2 to 2.8% of germanium, 0.2 to 1.3% of indium, and 150 to 1200g / t. Therefore, the soot containing various metals obtained whe...

Claims

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Application Information

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IPC IPC(8): C22B7/02C22B41/00C22B58/00C22B13/00C22B11/00C22B19/30
CPCY02P10/20
Inventor 普世坤朱知国尹国文
Owner YUNNAN DONGCHANG METAL PROCESSING
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