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Gorniy vestnik Uzbekistana

Abstract

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.

First Page

53

Last Page

56

References

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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