新型阴离子改性捕收剂DHT-4对黑钨矿的捕收性能及作用机理

Collecting Capability and Mechanism of New Type Modified Anion Collector DHT-4 on Wolframite

黑钨矿常规浮选捕收剂存在选择性差、用量高、成本高、指标差等问题,为此,东北大学研究了一种新型阴离子改性捕收剂DHT-4。单矿物浮选试验表明,在常温、p H为5.5、DHT-4用量为70 mg/L时,黑钨矿回收率可达89.1%。应用Material-Studio分子模拟软件构建药剂、矿物模型,并通过分子模拟探讨DHT-4与黑钨矿的作用机理,结果表明,DHT-4分子和黑钨矿表面活性位点原子之间不存在静电吸附,而是存在强烈的化学键合作用和氢键作用,并通过Zeta电位分析结果得到了验证。

The conventional flotation collector of wolframite has poor selectivity,high consumption,high cost,poor index etc. to solve these problem,a new type anion modified collector DHT-4 was developed by Northeastern University. The single mineral flotation tests show that at the condition of room temperature,p H value 5. 5,dosage of DHT-4 is 70 mg / L,the recovery rate of wolframite is up to 89. 1 %. Agents and mineral model are built by application of Material-Studio molecular simulation software,and the mechanism of DHT-4 on wolframite were explored by molecular simulation. Results show that there is no electrostatic adsorption between DHT-4 molecules and wolframite surface active site atoms,but there is a strong chemical bonding and hydrogen bonding interactions,and the results are verified through Zeta potential analysis results.