Journal
JOURNAL OF HAZARDOUS MATERIALS
Volume 384, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.jhazmat.2019.121456
Keywords
Gold; Chlorination roasting; Microwave assistance; Cyanide tailings; Green process treatment
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Funding
- National Natural Science Foundation of China [51604135]
- China Scholarship Council (CSC) [201708740004]
- Academic New Artist Award for Doctoral Postgraduate in Yunnan Province
- Analysis and Testing Fund of Kunming University of Science and Technology [2018P20173102007]
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A new technology for treating cyanide tailings (CT) by microwave chlorination roasting was first proposed in this study. A green process with prospective environmental and economic significance was experimentally and theoretically established for the sustainable extraction of gold from CT. The microwave roasting behavior and trajectory of gold in different gold-bearing bodies under microwave-enhanced roasting and conventional roasting conditions were explored and compared by introducing the concept of thermal and non-thermal effects provided by the microwave field. At the same time, the superiority of microwave chlorination roasting was verified by a series of experiments. Under the same conditions of the roasting experiments, the energy consumption of conventional calcination was more than double greater than that of microwave roasting. Finally, the essence of microwave chlorination roasting in the treatment of CT was summarized as a non-polluting process.
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