江西某白钨矿浮选分离小型试验研究

针对江西某白钨矿回收率低、精矿品位不高的现状,进行了实验室小型试验研究。试验结果表明,操作条件经进一步优化后,在精矿品位略有提高的情况下,精矿的回收率提高了7%。     

白钨矿浮选研究现状

概述了白钨矿的性质特征,总结了近年来白钨矿浮选药剂新进展及应用和新型白钨矿浮选设备的发展,并指出了白钨矿浮选药剂和设备的发展方向。     

白钨矿浮选研究进展

在总结钨矿物浮选方面技术成就的基础上,叙述了白钨矿浮选研究的进展,且对白钨矿浮选药剂的发展方向进行了展望。     

某白钨矿浮选工艺研究

介绍了某地高硫白钨矿石浮选药剂条件试验研究。在磨矿细度-200目占70%~75%的磨矿条件下,预先脱硫浮选,再常温浮选白钨,得到白钨精矿品位62.87%,回收率为84.33%。结果表明,此选矿工艺可有效处理该地区高硫白钨矿石。     

云南某白钨矿浮选试验研究

针对云南某高钙型白钨矿所采用的重选和浮选联合工艺流程生产指标不理想的情况,本论文结合原矿性质采用“预先脱硫脱碳-白钨加温一粗两精三扫”的全浮选闭路试验流程,在控制最佳流程参数的基础上获得了含WO₃58.7%、回收率75.59%的钨粗精矿,为企业的技术改造提供了支撑。     

白钨矿浮选药剂研究进展

白钨矿浮选的难点主要是与含钙脉石矿物的分离,要实现白钨矿与含钙脉石矿物的分离,就需要做到白钨矿的选择性捕收,以及对含钙脉石矿物的选择性抑制。文章分析了白钨矿浮选的难点,从浮选药剂作为切入点介绍了相关捕收剂和调整剂的开发现状、作用机理、药剂组合和实际应用,客观评价了各类药剂的优势与不足, 展望了未来白钨矿浮选药剂的发展,旨在实现白钨矿高效浮选富集、降低生产成本、减小环境污染。      

某白钨矿浮选工艺研究

介绍了某地高硫白钨矿石浮选药剂条件试验研究。在磨矿细度-200目占70%~75%的磨矿条件下,预先脱硫浮选,再常温浮选白钨,得到白钨精矿品位62.87%,回收率为84.33%。结果表明,此选矿工艺可有效处理该地区高硫白钨矿石。     

柠檬酸在白钨矿萤石浮选分离中的抑制作用及机理研究

白钨矿萤石浮选的关键是找到一种高效的抑制剂。本文研究了柠檬酸在白鸽矿萤石分离中对萤石的抑制作用，并通过考察生成表面亲水配络合物的自由能变化，初步探讨了抑制的机理。     

微细粒白钨矿浮选研究进展

随着易选钨资源被大量地开采,白钨矿资源日趋“贫、细、杂”,这也使得微细粒级白钨矿的回收利用难度增大。文章分析了微细粒白钨矿浮选的难点,从微细粒白钨矿的浮选工艺、浮选药剂、浮选设备三方面评述了微细粒白钨矿浮选的研究进展;并分析了气泡、磨矿、矿浆中离子、不同粒级交互作用等4个因素对微细粒浮选的影响,揭示了微细粒白钨矿浮选的主要影响因素;最后展望了未来微细粒白钨矿浮选的研究重点。文章可为微细粒白钨矿富集浮选、实现白钨矿资源的清洁、高效回收提供借鉴。     

某难处理白钨矿加温浮选试验研究

云南某高钙型白钨矿石墨含量高,采用的重选和浮选联合工艺流程生产指标不理想,结合原矿性质,采用"预先脱硫脱碳—加温浮选"的全浮选闭路试验流程,在控制最佳流程参数的基础上获得了含WO_3 57.45%、回收率72.85%的钨粗精矿。研究结果可为同类矿物的浮选提供参考。     

The flotation separation of scheelite from calcite using a quaternary ammonium salt as collector

The flotability of scheelite and calcite was studied with Dioctyl dimethyl ammonium bromide (BDDA). The experiments were conducted on individual and mixed minerals as a function of pH with a micro-flotation cell. And oleic acid was tested for comparison. The flotation results revealed that the performance of BDDA is better than that of oleic acid and the best separation could be achieved with BDDA over the pH range 8-10. Through preliminary analysis, it is concluded that BDDA reacts with scheelite through electrostatic interaction.     

ZL捕收剂浮选白钨矿的研究和应用

分别用731氧化石蜡皂和ZL作白钨矿的捕收剂,选别含钙脉石矿物高的白钨矿和多金属白钨矿,小型试验和工业试验结果表明,用ZL获得的钨精矿品位和回收率均高于用731氧化石蜡皂,且ZL捕收剂用量少.当含钙脉石矿物高的白钨矿矿石的原矿品位为WO30.58%时,用ZL作捕收剂可获得钨精矿品位66.82%、回收率90.98%的工业试验指标.ZL对白钨矿的捕收能力强、选择性好,且用量少.     

ZL捕收剂浮选白钨矿的研究和应用

分别用731氧化石蜡皂和ZL作白钨矿的捕收剂,选别含钙脉石矿物高的白钨矿和多金属白钨矿,小型试验和工业试验结果表明,用ZL获得的钨精矿品位和回收率均高于用731氧化石蜡皂,且ZL捕收剂用量少.当含钙脉石矿物高的白钨矿矿石的原矿品位为WO30.58%时,用ZL作捕收剂可获得钨精矿品位66.82%、回收率90.98%的工业试验指标.ZL对白钨矿的捕收能力强、选择性好,且用量少.     

The DFT study of cyclohexyl hydroxamic acid as a collector in scheelite flotation

In this paper, cyclohexyl hydroxamic acid (CHA) was investigated as a new collector for scheelite flotation by the Density Functional Theory (DFT) calculation, mineral flotation tests, adsorption measurement and zeta potential determination. The DFT computation results indicated that the dianion of CHA or benzoylhydroxamic acid (BHA) exhibited stronger chemical reactivity than their anions and neutral molecules, and that the replacement of phenyl group by cyclohexyl group in BHA molecule significantly impacted the electron donating ability of hydroxamate collectors. In alkaline aqueous solutions, the two oxygen atoms in the dianions of CHA or BHA charged more negative charges than other atoms, and hence became their reactive center. The dianion of CHA exhibited higher atomic charge value, HOMO (Highest Occupied Molecular Orbital) energy, bigger dipole moment and binding energy with Ca²⁺, thus it had stronger collecting ability for scheelite than that of BHA. In addition, the results of flotation tests, adsorption measurement and zeta potential determination validated that the collecting capability of CHA was stronger than that of BHA, which achieved excellent agreement with computational analysis.     

新型捕收剂在白钨矿浮选中作用机理的研究

单矿物试验表明,以化工废料为原料合成的新型捕收剂D16-4对白钨矿的选择性、捕收能力强于传统药剂氧化石蜡皂(731).表面动电位测定和红外光谱分析表明,在pH=11.0的强碱性矿浆中,水玻璃和捕收剂D16-4均以化学作用吸附在白钨矿、萤石和方解石表面;在大量水玻璃的作用下,D16-4在白钨矿表面仍有强烈的化学吸附,而在方解石和萤石表面的吸附减弱.与常规药剂731相比,用D16-4可更有效地实现白钨矿与方解石、萤石的浮选分离.     

The flotation separation of scheelite from calcite using acidified sodium silicate as depressant

The flotation separation of scheelite from calcite using sodium oleate as collector and acidified sodium silicate as depressant has been studied. The results show that sodium oleate has collecting ability to both scheelite and calcite and the flotation separation of scheelite from calcite cannot be realized if collector is used only. The depressant acidified sodium silicate has selective depression effect on calcite and the optimum ratio of sodium silicate to oxalic is 3:1. The use of acidified sodium silicate as depressant can achieve the flotation separation of scheelite from calcite. Infrared studies and zeta potential measurements showed that the pre-adsorption of acidified sodium silicate interferes with the adsorption of sodium oleate on calcite surface while does not interfere with its adsorption on scheelite surface.     

Selective flotation of scheelite from calcite and fluorite using a collector mixture

Collector 733, a sodium soap (C_12–16COONa) is widely used industrially for scheelite flotation. Low selectivity of 733 collector is always observed. In this study, a collector mixture of 733 and MES (sodium fatty acid methyl ester sulfonate) demonstrated a high selectivity for the flotation of scheelite from calcite and fluorite. An optimal mass ratio 4:1 of 733:MES was found, producing a 65.76% WO₃ concentrate grade with a recovery of 66.04% from a feed material containing only 0.57% WO₃. In addition, the effect of water hardness and water glass addition were studied. The results indicated that the presence of Ca²⁺ or Mg²⁺ had little effect on the adsorption of the collector mixture at the scheelite surface. Addition of water glass for depressing calcite and fluorite had no significant effect on the adsorption of the collector mixture on the scheelite surface. The advantages of this new collector mixture (733+MES) include lower cost, low dosage, high tolerance against water hardness and high selectivity, and this collector mixture has great potential for industrial application.     

用高效捕收剂PZO实现铜金硫多金属矿浮选分离的研究

为实现西南某铜金硫多金属矿在低碱环境下的浮选分离,对硫化铜矿捕收剂 PZO的性能进行了研究．结果表明,PZO的起泡性能不仅优于2号油和 M IBC ,而且对硫化铜矿和自然金的选择捕收效果优于丁铵黑药和丁基黄药．在原矿铜品位1．23,、金品位1．98 g/t、银品位26．15 g/t、硫品位12．68,时,采用组合药剂丁基黄药＋PZO作捕收剂,铜硫分离时将石灰用量从丁基黄药＋2号油组合时的6000 g/t（pH＝11．2）降至3000 g/t（pH＝9．8）,最终可获得铜品位23．02,、回收率92．65,,金品位20．32 g/t、回收率50．88,,银品位267．35 g/t、回收率56．50,的铜精矿,以及品位41．52,硫精矿的良好指标．     

某高效铜捕收剂在铜硫矿石中的试验研究

某铜矿胶状黄铁矿含量较高,属难选矿石.针对其现场铜选别指标低的问题,进行高效铜捕收剂浮选试验研究.试验采用铜优先浮选工艺,高效捕收剂Y10作捕收剂、石灰法抑硫浮铜,获得了铜精矿铜品位为22.90％、回收率为86.83％的良好试验指标.