Production of Elemental Tellurium During Processing of Tellurium-Containing Middling
Nitsenko A. Linnik X. Volodin V. Burabayeva N. Trebukhov S.
November 2025Multidisciplinary Digital Publishing Institute (MDPI)
Processes
2025#13Issue 11
This paper presents results derived from carbothermic reduction of tellurium from a tellurium-containing condensate obtained during the oxidative-distillation roasting of a tellurium-containing middling. It is shown that the tellurium-containing condensate contains TeO2 and Te2O3(SO4) phases. A regression model and a generalized equation were constructed using mathematical planning methods. This model and equation describe the dependence of tellurium recovery from the tellurium-containing condensate on the main process parameters. The developed models demonstrated a high degree of adequacy and made it possible to calculate the optimal parameters for the carbothermic reduction of tellurium. Experimental verification confirmed the possibility of obtaining elemental tellurium with a purity of 99.5%. The obtained data indicate the feasibility of producing crude tellurium by means of a two-stage pyrometallurgical process performed at low pressure. Organization of the process via the use of sealed equipment for the capture of tellurium-containing compounds through condensation significantly reduces the environmental risks associated with the toxicity of tellurium and its compounds.
carbothermic reduction , low pressure , tellurium , tellurium oxide
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Institute of Metallurgy and Ore Beneficiation JSC, Satbayev University, 29/133 Shevchenko St, Almaty, 050010, Kazakhstan
Institute of Metallurgy and Ore Beneficiation JSC
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