Research on Material and Environmental Properties of Gold Tailings

Abstract

Abstract: Gold tailings are common solid wastes in the process of gold mining. Most of the tailings are directly accumulated in the tailing pond and cannot be recycled, which brings a series of social and environmental problems. The research of resource utilization is becoming more and more urgent. The material properties of gold tailings were investigated by XRD, XRF, SEM, laser particle sizer, TG and DSC. The environmental properties of gold tailings were studied by ICP, low background multi-channel gamma spectrometer and pH value determination. The leaching content, radioactivity specific activity and acid-base property of heavy metals were discussed, the environmental hazards by gold tailings and the feasibility of secondary utilization were analyzed. The results show that the 30 d heavy metal leaching content is less than the surface water class Ⅲ limit, and the index I_Ra=0.1 and I_γ=0.4 are all less than the national radioactive restriction standards, which provides a reference for the comprehensive application of gold tailings in the construction industry.

Key words: gold tailing, material property, environmental property, particle size distribution, heavy metal, radioactivity, secondary utilization

CLC Number:

X753

ZHU Jianping, YUE Hongzhi, ZHU Junge, BAI Rong, LI Hongda. Research on Material and Environmental Properties of Gold Tailings[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2021, 40(10): 3457-3463.

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