关键词: 钨细泥, SLon离心机, 离心分选, 浮选脱硫

Abstract: Abstract It is an important way to improve the utilization level of tungsten resources through improving the recovery rate of tungsten fine slime. Centrifugal separation is one of the effective methods to treat fine tungsten minerals. The grade of WO3 in tungsten slime from a Jiangxi tungsten ore is 0.62%， and the content of -50 μm is 56.83%， in which the distribution rate of WO3 is 87.59%. In order to realize the effective recovery of tungsten and associated molybdenum and bismuth in the fine tungsten slime， the process of "flotation desulfurization and SLon centrifuge gravity separation" was used to optimize the experimental conditions， and the industrial test was carried out under the optimal conditions. The results showed that the optimum dosage of butyl xanthate was 160 g/t in flotation desulfurization test， and the optimal drum speed and washing water volume of SLon centrifuge were 680 r/min and 1.6 r/min， respectively. Under the conditions of tungsten grade of 0.52%， molybdenum grade of 0.088% and bismuth grade of 0.073%， the industrial test was carried out by the technological process of "flotation desulfurization and SLon centrifuge gravity separation". Finally， tungsten concentrate with WO3 grade of 25.20% and recovery rate of 73.66% was obtained. Meanwhile， sulfur-bearing production with molybdenum grade of 7.43% and bismuth grade of 5.31% were obtained， with corresponding recovery rates of 56.57% and 48.74%，indicated the better indexes. When the technology of "flotation desulfurization and SLon centrifuge gravity separation" was used to treat tungsten slime from a tungsten mine in Jiangxi Province， the annual increase of tungsten， molybdenum and bismuth metal amounts is 11.4 t， 5.89 t and 1.7 t， and the annual output value is about 2 million yuan， bringing about the remarkable economic benefit.

Key words: Tungsten slime, SLon centrifugal separators, Centrifuge separation, Flotation desulfurization