Method for extracting refined tellurium from tellurium-contained smelting slag

A technology for smelting slag and extracting essence, which is applied in the field of extracting refined tellurium, can solve the problems of low leaching rate, increase operating procedures and costs, and increase the difficulty of recycling, etc., and achieve high leaching rate, reduce ineffective consumption, and save production costs Effect

Inactive Publication Date: 2009-10-28
YONGXING XINTAI SILVER IND
View PDF0 Cites 44 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the tellurium-containing by-products produced by wet production, when this method is used, the volatilization of tellurium is relatively large, the loss rate is high, and the energy consumption is high
[0004] Second, it consumes a lot of alkali
In the alkaline leaching process, other impurities such as antimony, arsenic, silicon, etc. are likely to enter the leaching solution together with tellurium, which not only consumes a large amount of alkali, but also requires purification and removal of impurities to meet the requirements for the production of tellurium dioxide, which increases the operating procedures and costs.
[0005] Third, the leaching rate of Te is low, generally 60-70%.
Unleached tellurium is dispersed in the products of subsequent smelting processes, and it is difficult to recover because its content is too low, an

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for extracting refined tellurium from tellurium-contained smelting slag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0032] A method for extracting refined tellurium from tellurium-containing smelting slag, comprising the following steps:

[0033] 1. Inorganic acid oxidation leaching

[0034] The tellurium slag is mixed with water according to the ratio of liquid-solid mass ratio of 2 to 6:1 for pulping, and after slurrying, inorganic acid and oxidant are added for stirring and leaching; after the reaction is completed, the suspension is filtered for liquid-solid separation, and the filter cake is The precious metal concentrate can be transferred to the precious metal recovery process; the tellurium-containing leaching solution can be transferred to the next process;

[0035] Inorganic acid is usually one or a mixture of sulfuric acid and hydrochloric acid, and the oxidant is potassium permanganate, hydrogen peroxide, manganese oxide, sodium persulfate, potassium persulfate, ammonium persulfate, sodium chlorate, potassium chlorate, sodium hypochlorite, hypochlorite One of potassium chlorate...

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 relates to a method for extracting refined tellurium from tellurium-contained smelting slag, which is characterized in that the method comprises the following steps of: oxidizing and leaching inorganic acid, replacing noble metal with a copper plate, depositing the copper by sodium sulfide, counteracting and depositing tellurium, alkaline leaching coarse TeO2, removing impurities by Na2S, concentrating and electrowinning. The method has the advantages of high recovery rate for tellurium, comprehensive and effective recovery of other useful metals, and suitably treating the tellurium-contained waste slag with high water content and small granularity generated in the metallurgy process by a wet-method.

Description

Technical field [0001] The invention relates to a method for extracting refined tellurium from tellurium-containing smelting slag. technical background [0002] The No. 52 element tellurium belongs to the group VI oxygen group element in the periodic table of elements, and its nature is a semi-metal, and its content in nature is extremely low. According to relevant literature reports, its content in the crust is 0.0006ppm, and it is dispersed in various parts of the crust. It is difficult to form ore deposits, but tellurium has a wide range of uses, such as additives in iron and steel metallurgy, protective sleeves for submarine cables, vulcanizing agents in the rubber industry, and catalysts in petrochemical industries. In recent years, with the development of science and technology, tellurium has been widely used in new energy and new materials, such as new energy battery cadmium-tellurium battery, new computer storage materials, photoelectric conversion film of TV camera ...

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): C01B19/02
Inventor 赵秦生江波许小兵许小龙
Owner YONGXING XINTAI SILVER IND
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