NIE Wen-lin1,2, WEN Shu-ming1,3*, ZHOU Yao-wen3, LIU Jun-bo1
(1. Faculty of Land Resource Engineering, Kunming University of Science and Technology, Kunming 650093, China;
2. Department of Mathematics and Physics, West Yunnan University, Lincang 677000, China;
3. State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming 650093, China)
Abstract: A detailed process mineralogical study of the rough sulfied concentrate of ores of the Dulong tin-zinc polymetallic depositin Wenshan, Yunnan has been carried out by using ways of chemical analysis, X-ray diffraction analysis, and optical microscopy in this paper. The results show that the rough sulfide concentrate mainly contains sulfur-bearing mineral of hexagonal pyrrhotite, zinc-bearing mineral of marmatite, tin-bearing mineral of cassiterite, harmful element arsenic-bearing mineral of arsenopyrite. Gangue minerals are mainly muscovite and sericite. Arsenopyrite is completely liberated, and pyrrhotite and marmatite are mostly liberated. However, most cassiterite crystals are associated with unliberated pyrrhotite and marmatite. The grades of sulfur, zinc, and tin of the concentrates are generally decreased with the decrease of their grain sizes. According to the results of process mineralogy, the rough sulfide concentrate of tin-zinc polymetallic ores in the Dulong deposit is suitable for tail-discarding firstly by using concentrating table, and arsenopyrite-removing secondly by using magnetic separation. Preliminary experiments show that this processing procedure has good effect of arsenic-removal. The research result can provide a scientific basis for improving quality, reducing impurity, as well as the comprehensive utilization of the rough sulfide concentrate of tin-zinc polymetallic ores in the Dulong deposit.
Keywords: The polymetallic ore deposit; rough sulfide concentrate; process mineralogy; improving quality and reducing impurity; arsenic-removing
ACTA MINERALOGICA SINICA Vol. 40, No.3, 2020, page 267-273
