Method for recovering tellurium, bismuth, antimony, and copper from complex material

A material and complex technology, applied in the field of separation and enrichment of non-ferrous metals, which can solve problems such as comprehensive recovery of valuable metals

Active Publication Date: 2013-11-20
JIANGXI COPPER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the existing process only extracts some of the metals, ...

Method used

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  • Method for recovering tellurium, bismuth, antimony, and copper from complex material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The chemical composition of the complex material is Cu11.25%, As6.58%, Te6.71%, Bi23.54%, Sb14.56%, put into the reaction kettle at a solid-liquid ratio of 1:4, and then press 100g / L in the kettle Sodium hydroxide concentration was added to solid caustic soda. The solution was kept at a constant temperature of 85°C and stirred for 4 hours. The filter residue contains 0.51% tellurium, and the leaching rate of tellurium is 95.01%.

[0037] Dilute sulfuric acid was added to the tellurium bath to adjust the pH, and the pH value was kept at 5.0 at the end point. During the tellurium precipitation process, the temperature was maintained at 85°C by heating with a steam coil, and the stirring was continued for 1 hour after reaching the end point. After standing still, the liquid and solid are separated. After the tellurium is precipitated, the liquid contains only 115mg / L tellurium, and the tellurium enrichment contains 71.32% tellurium. It enters the refined tellurium produc...

Embodiment 2

[0043]The chemical composition of the complex material is Cu11.25%, As6.58%, Te6.71%, Bi23.54%, Sb14.56%, put it into the reaction kettle at a solid-liquid ratio of 1:8, and then press 150g / L in the kettle Sodium hydroxide concentration was added to solid caustic soda. The solution was kept at a constant temperature of 60°C and stirred for 7 hours. The filter residue contains 0.48% tellurium, and the leaching rate of tellurium is 95.12%.

[0044] Dilute sulfuric acid was added to the tellurium immersion solution to adjust the pH, and the pH value was kept at 5.5 at the end point. During the tellurium precipitation process, the temperature was maintained at 85°C by heating with a steam coil, and the stirring was continued for 1 hour after reaching the end point. Then stand still, liquid and solid are separated, the liquid contains only 153mg / L tellurium after tellurium precipitation, and the tellurium enrichment contains 71.65% tellurium.

[0045] Add copper, bismuth and ant...

Embodiment 3

[0050] The chemical composition of the complex material is Cu11.25%, As6.58%, Te6.71%, Bi23.54%, Sb14.56%, put into the reaction kettle at a solid-liquid ratio of 1:5, and then press 120g / L in the kettle Sodium hydroxide concentration was added to solid caustic soda. The solution was kept at a constant temperature of 90°C and stirred for 4 hours. The filter residue contains 0.45% tellurium, and the leaching rate of tellurium is 95.36%.

[0051] Dilute sulfuric acid was added to the tellurium immersion solution to adjust the pH, and the pH value was kept at 4.5 at the end point. During the tellurium precipitation process, the temperature was maintained at 85°C by heating with a steam coil, and the stirring was continued for 1 hour after reaching the end point. After standing still, the liquid and solid are separated, and the tellurium content of the liquid is only 109mg / L after the tellurium precipitation, and the tellurium enrichment contains 71.36% tellurium.

[0052] Add ...

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Abstract

The invention aims at providing a method for recovering tellurium, bismuth, antimony, and copper from a complex material. The method comprises the steps that: the complex material is added into a sodium hydroxide solution according to a solid-liquid ratio; a temperature and a stirring time are controlled; when a reaction is finished, bismuth, antimony and copper slag and tellurium leaching liquid are obtained; the pH of the tellurium leaching liquid is regulated by adding dilute sulfuric acid; the mixture is settled and is subjected to solid-liquid separation, such that tellurium enrichment is obtained; the bismuth, antimony and copper slag is added into a dilute sulfuric acid solution according to a solid-liquid ratio; a reaction is sufficiently carried out, such that bismuth and antimony slag and copper leaching liquid are obtained; the solution temperature of the copper leaching liquid is controlled, and NaOH is added for precipitating copper; according to a solid-liquid ratio, the bismuth and antimony slag is added into a mixed solution of sulfuric acid and sodium chloride; the mixture is violently stirred, such that bismuth-antimony separation is realized; NaOH is used for regulating solution pH value and for precipitating bismuth; when the reaction is completed, bismuth enrichment and bismuth-precipitated liquid are obtained. With the technical scheme provided by the invention, tellurium, bismuth, antimony, and copper valuable metals can be comprehensively recovered from the complex material, such that waste is turned into valuable matters.

Description

technical field [0001] The invention belongs to the technical field of separation and enrichment of nonferrous metals, and relates to an all-wet process for comprehensively recovering materials containing tellurium, bismuth, antimony and copper. Background technique [0002] In the production of extracting gold and silver from copper anode slime, the production wastewater is treated to obtain a complex material rich in valuable metals such as tellurium, bismuth, antimony, copper, etc. Its typical chemical composition is: Cu10-15%, As5-10%, Te2~8%, Bi15~25%, Sb10~15%. At present, the existing technology only extracts part of the metals, and does not comprehensively recover the valuable metals in the materials. [0003] Tellurium, bismuth, and antimony are all important strategic materials. It is of great significance if a technology for comprehensively extracting tellurium, bismuth, and antimony from such complex materials can be developed. Contents of the invention [00...

Claims

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Application Information

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IPC IPC(8): C22B3/00C22B7/00C22B30/02C22B30/06C22B15/00C01B19/02
CPCY02P10/20
Inventor 梁亚群胡建辉刘永平杨兴文曾晓冬涂相林祝志兵倪明星刘海华何天云刘文魏德贵茆蔚杨玉其
Owner JIANGXI COPPER
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