摘要
对湖南某钨矿山中部采集样开展了重介质预抛及白钨常温浮选试验研究。重介质预抛试验结果表明,以-15+0.5 mm粒级作为预抛给矿,在重介质密度2.37 g/cm^(3)条件下,可获得抛尾产率31.37%,沉砂WO3品位、回收率分别为0.34%、96.62%的良好指标;脱硫浮选-白钨常温浮选试验结果表明,重介质预抛对WO3在含硫产品中的作业损失率影响不大;但不预抛、原矿直接入磨浮选会导致更多的钨矿物存在于中矿产品中。闭路试验结果表明,经重介质预抛后,常温浮选钨精矿WO3品位、回收率分别为5.50%、84.15%。中部采集样采用重介质旋流器预抛不但有利于改善钨产品质量指标,还有助于尾矿的综合利用。
A process consisting of pre-discarding with heavy medium separation and ambient-temperature flotation was adopted for a scheelite ore sampled from the middle-layer mining zone of a tungsten mine in Hunan Province. A heavy medium separation test with the ore size of-15+0.5 mm as the feeding show that in the heavy medium with the density of 2.37 g/cm^(3), 31.37% of yielded tailings can be discarded, while the obtained heavy product has WO3grade and recovery increased to 0.34% and 96.62% respectively. A test by using a process of desulfurization flotation plus ambient temperature flotation for scheelite demonstrates that the process of pre-discarding with heavy medium has little effect on the operation loss rate of WO3in sulfur-containing products. However, the raw ore is directly taken into the flotation without a pre-discarding will lead to more tungsten minerals left in the middlings. The closed-circuit test shows that after a pre-discarding by heavy medium separation, the tungsten concentrate from ambient-temperature flotation has its WO3grade and recovery reaching 5.50% and 84.15% respectively. It is concluded that pre-discarding by using heavy medium cyclone is conducive to improvement of tungsten product index and comprehensive utilization of tailings.
作者
袁代军
郭江旭
曾志飞
曾海涛
YUAN Daijun;GUO Jiangxu;ZENG Zhifei;ZENG Haitao(Hunan Yaogangxian Mining Co Ltd,Chenzhou 423000,Hunan,China;Changsha Research Institute of Mining and Metallurgy Co Ltd,Changsha 410012,Hunan,China)
出处
《矿冶工程》
CAS
北大核心
2023年第1期59-62,共4页
Mining and Metallurgical Engineering
基金
国家重点研发计划(2022YFC2905103)。
关键词
钨矿
重介质预抛
常温浮选
粗粒尾矿
白钨矿
旋流器
抛尾
tungsten ore
pre-discarding by heavy medium separation
ambient-temperature flotation
coarse tailings
scheelite
cyclone
tailings discarding
