黑钨细泥浮选新的工艺流程及药剂研究

采用以水玻璃为主的组合抑制剂，ＢＤ单─抑制剂和以苯甲羟肟酸为主的混合捕收剂，处理柿竹园多金属矿白钨加温精选尾矿，品位含ＷＯ３为１．７４％（质量分数），经一次粗选、三次扫选、三次精选，能获得精矿品位ＷＯ３＞６５％，回收率＞９０％（质量分数）的闭路试验结果．     

江西某钨钼铜矿石选矿试验研究

介绍了江西某钨钼铜矿矿石的选矿试验。试验通过对选别流程和粗选设备进行不同方案对比,选择了合适的方案,在小型试验基础上进行了扩大试验,为建厂投产提供了可靠依据。     

黑钨矿选矿工艺技术改造与生产实践

通过对江西荡坪钨业有限公司九西选矿厂原选矿工艺调查研究,针对性地指出该选矿工艺存在的问题,并逐步对原选矿工艺进行改造。通过工艺改造,原矿处理量由改造前的134t/d提高到360t/d,选矿回收率由改造前的67.08%提高到71.77%,取得了显著的经济效益。     

微细粒级黑钨矿浮选现状

从选矿工艺流程、浮选药剂、载体浮选和选择性絮凝等方面，介绍国内外黑钨细泥浮选现状，着重归纳国内在黑钨细泥浮选工艺及药剂研究所取得的突破性进展。近期选用以苯甲羟肟酸为主的混合捕收剂及以水玻璃为主的组合抑制剂和单一抑制剂ＢＤ，对柿竹园选厂含ＷＯ３ １．９３％的加温尾矿采用浮－重选矿工艺进行工业试验，获得黑钨精矿含ＷＯ／－３６９．７５％，回收率５１．７３％，钨中矿含ＷＯ３ ２９．８０％，回收率１６．３４     

某难选黑白钨多金属矿中黑钨矿的选矿试验研究

某难选黑白钨多金属矿,矿物共伴生关系复杂,其黑钨选矿作业给矿中脉石矿物种类多,部分脉石矿物可浮性较好,且有一定的泥化矿物,对黑钨矿的分选干扰较大．针对该矿的矿石性质,在给矿WO3品位0．69％时,采用“离心机预处理－浮选”组合工艺,最终获得黑钨精矿WO3品位46．12％、回收率85．57％的指标．     

Recovery Enhancement of Ultrafine Wolframite through Hydrophobic Flocs Magnetic Separation

The recovery of ultrafine wolframite (<10 μm) by using flocs magnetic separation was investigated. Magnetic-separation results showed that recovery was closely correlated with the particle size of wolframite, where ultrafine particles were difficult to capture. Hydrophobic particles induced by octyl hydroxamic acid (OHA) could generate flocs, which enlarged the apparent size of particles. Furthermore, the recovery of ultrafine wolframite by flocs magnetic separation was higher than that by conventional magnetic separation. These findings indicated that the recovery was related to the increase in the magnetic force due to the particles’ size induced by hydrophobic flocculation.     

石英脉型黑钨矿床找矿评价的几个地质问题

应用地表标志带和隐伏花岗岩进行隐伏、半隐伏石英脉型黑钨矿床预测和评价,必须研究其地质地球化学类型,只有属于钨锡硫化物型的标志带,才具有找矿评价意义。对隐伏花岗岩体预测研究,不仅要研究隐伏岩体的地球化学类型,还应研究岩体多期多阶段的成岩成矿作用,才具有找矿评价意义。     

钨矿物浮选药剂新进展

文中在总结前人在钨矿物浮选方面的技术成就的基础上,结合冶炼技术的进步,提出了钨矿浮选药剂新的发展方向．     

过氧化钠熔融-电感耦合等离子体质谱法测定黑钨矿中铊

黑钨矿中铊会污染土壤和水源,开采之前需要对黑钨矿中的铊含量进行检测。采用过氧化钠熔融分解样品,用30 mL硝酸浸取分解产物,选择²⁰⁵Tl为测定同位素,以10 ng/mL铱为内标进行校正,建立了电感耦合等离子体质谱法(ICP-MS)测定黑钨矿中铊的分析方法。对过氧化钠用量及熔融时间进行优化,结果发现,对于0.30 g样品,采用2.5 g过氧化钠于700 ℃熔融20 min后,样品中铊可被硝酸浸取完全。在优化的实验条件下,校准曲线相关系数为0.999 9,线性范围为0.05~10 ng/mL,方法检出限为0.03 μg/g,定量限为0.099 μg/g。按照实验方法对黑钨矿样品中铊进行测定,结果的相对标准偏差(RSD, n=11)小于3%。将实验方法应用于钨矿石成分分析标准物质中铊的测定,结果与认定值的相对误差小于5%。先用酸消解法处理黑钨矿样品,所得不溶物继续用过氧化钠熔融处理,合并两次分解所得溶液后用火焰原子吸收光谱法进行测定,结果与实验方法保持一致。     

Flotation Mechanism of Wolframite with Varied Components Fe/Mn

Wolframite is a series of minerals belonging to the isomorphic (Fe, Mn)WO₄ with varied Fe/Mn ratios, for which the floatability changes with its composition. In this work, the effects of composition on floatability were studied using micro flotation, collector adsorption tests, infrared spectroscopy, and X-ray photoelectron spectroscopy (XPS). The results showed that with an increasing Fe/Mn ratio, the flotation recovery of wolframite increased when using benzohydroxamic acid (BHA) as collector, but decreased when sodium oleate (NaOl) was applied. The chemisorption differences of these collectors were observed on the surface of wolframite, i.e., adsorption of BHA is greater at the surface of high-Fe wolframite, while NaOl is more easily adsorbed on high-Mn wolframite. Moreover, XPS analysis indicates that a new ferric product was generated on the surface of wolframite in the presence of BHA. In contrast, a new manganese product was formed after the addition of NaOl. These results demonstrate that Fe is the adsorption site for BHA, while Mn is the site for NaOl.