Gorniy vestnik Uzbekistana


The article presents the results of microwave processing of gold-containing sulfidic carbonaceous flotation concentrate, with the aim to oxidize sulfide minerals and organic carbon, in which gold is associated. The flotation concentrate was processed in a microwave oven with an output power of 700 W, so that after every 2 minutes of treatment the magnetron was turned off, the sample was mixed, then turned on. The degree of removal of sulfide sulfur was 96%. Organic carbon is removed by 76.7%. The IR spectra of the initial flotation concentrate and microwave treatment product are given, as well as the results of thermogravimetric analysis. The optimal conditions for microwave processing were determined: the power of 700 W, 2 minute processing time and 1 minute mixing time. The main advantage of the microwave processing method is the short time and the high degree of sulfide sulfur removal.

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1. Amankwah, R.K., Pickles, C.A., 2009. Microwave roasting of a carbonaceous sulphidic gold concentrate. Miner. Eng. 22 (13), рр. 1095–1101. 2. Ma, S.J., Mo, W., Su, X.J., Liu, P., Yang, J.L., 2010. Removal of arsenic and sulfur from a refractory gold concentrate by microwave heating. Min. Eng. 23 (1), рр. 61–63 3. Nanthakumar, B., Pickles, C.A., Kelebek, S., 2007. Microwave pretreatment of a double refractory gold ore. Min. Eng. 20 (11), рр. 1109–1119. 4. Qu, Z.L., 2011. The Study on Pretreatment Refractory Gold Concentrate by Microwave Roasting. (Master's Thesis). Shenyang Ligong University, China.



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