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Technical Tellurium
Standard:GOST 17614-2018
Production cycle:
- leaching of soda-telluric slags;
- filtration of telluride pulp;
- electrolysis and filtration of rough tellurium;
- restoration with aluminum powder;
- filtration and washing of telluride pulp;
- aeration;
- filtration and washing of tellurium;
- drying, sieving and sealing of tellurium.
Application range:
It is used for the production of alloys, thermoelectric materials, semiconductors, rubbers, glasses, light sources and other purposes.
Form and packing:
Technical tellurium in powder has dark gray or black colors. Powdered tellurium of all brands must pass through a sieve with a grid accuracy of "1K" according to GOST 6613. They are packed in polyethylene bags according to GOST 17811-78. The bags must be brewed and packed in cotton bags and placed in boxes according to GOST 5959-80. The weight of the box (gross) should not exceed 50 kg.
Brand Т00
|
Component |
Norm |
|
Mass fraction of tellurium, % |
99,95 |
|
The mass fraction of selenium, % |
0,01 |
|
Mass fraction of lead, % |
0,001 |
|
Mass fraction of copper, % |
0,004 |
|
Mass fraction of sulfur, % |
0,02 |
|
The presence of foreign objects (wood, scrap metal) |
Not allowed |
Brand Т00
|
Component |
Norm |
|
Mass fraction of tellurium, % |
99,93 |
|
The mass fraction of selenium, % |
0,01 |
|
Mass fraction of lead, % |
0,001 |
|
Mass fraction of copper, % |
0,002 |
|
Mass fraction of sulfur, % |
0,04 |
|
The presence of foreign objects (wood, scrap metal) |
Not allowed |
