10/10/2023 0 Comments Copper tellurium![]() OUS Geological Survey Professional Paper 1802. Schulz KJ, Deyoung JH, Seal RR, Bradley DC (2017) Critical mineral resources of the United States-Economic and environmental geology and prospects for future supply. ĭiaz LA, Lister TE, Parkman JA, Clark GG (2016) Comprehensive process for the recovery of value and critical materials from electronic waste. Goldfarb RJ, Berger BR, George MW, Robert II (2017) Tellurium. This study confirmed the process as a sustainable and highly efficient method to extract tellurium and copper from copper telluride slag, which is of profound significance for the profitability and development of the tellurium metallurgical industry. The converted copper oxide could then undergo the copper smelting process for further copper extraction. The comprehensive recovery of tellurium exceeded 90% during this process and its purity reached 99.83%. Elemental Te was directly separated and recovered by vacuum carbothermal reduction at 873 K for 1 h with 15% carbon content. ![]() 83.54% grade TeO 2 was precipitated by the neutral leaching and acid precipitation of sodium tellurite slag at pH 4–6, with a tellurium precipitation ratio of 99.08%. The results showed that Te and Cu existing as cuprous telluride (e.g., Cu 2Te, Cu 0.64Te 0.36, and Cu 7Te 4) in the raw material had been converted into upper stratum sodium tellurite slag and lower stratum copper oxide phase after soda smelting at 1273 K for 4 h. This process includes the separation of Cu and Te by soda smelting, followed by leaching and precipitation to prepare TeO 2, and the recovery of elemental Te by vacuum carbothermal reduction. Herein, a clean and efficient process is proposed. Existing tellurium recovery/treatment processes consist of oxidizing leaching, precipitation, alkaline leaching, and electrolysis, which suffer from excessive consumption and generate high amounts of toxic hazardous waste. ![]() Copper telluride slag is a ubiquitous intermediate by-product produced in the comprehensive recovery of tellurium from copper anode slime.
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