Method for extracting high-purity tellurium oxides from copper anode mud

A technology of copper anode slime and tellurium oxide, applied in the direction of binary selenium/tellurium compounds, etc., can solve the problems of low grade of tellurium oxide, complicated process, low recovery rate, etc., and achieve high recovery rate, high purity, and simple process effect

Active Publication Date: 2012-06-20
湖南省金润碲业有限公司
View PDF4 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the existing separation methods, the combined process of partial fire furnace and wet leaching is generally used. For example, after the rotary kiln is roasted to extract selenium, the roasted slag is leached to separate copper, tellurium and lead, and then separate gold and silver. The process is relatively complicated. , a

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0010] The method for extracting high-purity tellurium oxide from copper anode slime of the present invention comprises the following steps:

[0011] (1) Separation of silver and lead. First add sulfuric acid with a concentration of 250g / L to the copper anode slime to make the liquid-solid ratio 6:1; then add sodium chlorate with a dosage ratio of 300kg / ton anode slime; then heat to 90°C for 6 hours, silver and Lead sinks in the slag and is separated, while gold, copper, bismuth, tellurium and selenium enter the leaching solution;

[0012] (2) Separation of precious metals, tellurium and selenium. Add table salt to the leaching solution treated by the above steps according to the standard of 100g / L, stir and dissolve, and then continue to add SO under the condition of solution temperature 65°C 2 Gas 1 hour, SO 2 The ventilation speed is controlled so that a small amount of bubbles appear on the liquid surface, until the tellurium content in the solution is less than 0.1g / L,...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a method for extracting high-purity tellurium oxides from copper anode mud. The method comprises the steps as follows: firstly, sulfuric acid is added in the copper anode mud at first, sodium chlorate is then added in the copper anode mud, the mixture is heated, silver and lead are precipitated in residues and are separated out, and gold, copper, bismuth, tellurium and selenium enter leach liquor; secondly, common salt is added in leach liquor that is processed in the first step, the mixture is mixed and resolved, then gaseous SO2 is pumped in mixed liquor for 1 hour, and gold, tellurium and selenium are reduced and deposited and then are processed through pressure filtration; thirdly, in step A, sulfuric acid is added in deposited residues of the gold, tellurium and selenium, then catalytic agents are added in the mixture, then sodium chlorate is added in the mixture until the color of the deposited residues is transformed into the color of tellurium oxides, and pressure filtration is carried out; in step B, sodium hydroxide is added in the deposited residues that are processed in the step A, the mixture is processed through pressure filtration, and then sodium tellurite and sodium selenite solution are obtained; and fourthly, sulfuric acid is added in sodium tellurite and sodium selenite solution which are obtained in the third step, sodium selenite remains in liquid, and tellurium dioxide is precipitated and separated out.

Description

technical field [0001] The invention relates to a method for extracting tellurium oxide, in particular to a method for extracting high-purity tellurium oxide from copper anode slime. Background technique [0002] Copper anode slime contains more valuable elements, including precious metals gold, silver, platinum, palladium, scattered metals selenium and tellurium, non-ferrous metals copper, lead, bismuth, etc. Extracting tellurium oxide from copper anode slime is the key to obtaining metal tellurium important way. In the existing separation methods, the combined process of partial fire furnace and wet leaching is generally used. For example, after the rotary kiln is roasted to extract selenium, the roasted slag is leached to separate copper, tellurium and lead, and then separate gold and silver. The process is relatively complicated. , and part of the tellurium will disperse when the copper is leached, and the lead will be leached together when the tellurium is separated. I...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C01B19/04
Inventor 李水林谢永金
Owner 湖南省金润碲业有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap