方铅矿与丁铵黑药作用的电化学反应机理及其浮选行为

The electrochemical mechanism and flotation behavior of galena in Ammonium butyldithiophosphate solution

研究了方铅矿在丁铵黑药浮选体系中,尤其是在强碱性介质中的电化学行为。结果表明:丁铵黑药在方铅矿表面以单质硫及捕收剂金属盐为主;采用高碱工艺优先浮选方铅矿,相应的药剂浓度需达到10-3mol/L以上,该浓度将在一定程度上影响浮选选择性,加大了生产成本,并且对环境不友好。以上这些不足可以采用与乙硫氮混合使用的方法得到解决。在pH=11.0的高碱条件下,合适的乙硫氮及丁铵黑药的质量比为1∶1,与之相匹配的药剂用量为2.2×10-5mol/L左右,丁铵黑药浓度为2.0×10-5mol/L左右,且电位稳定在0.2V左右最佳。

Electrochemical behaviour of galena is studied in Ammonium dibutyldithiophosphate system, especially in high alkalinity media. It has been shown the product of galena with Ammonium dibutyldithio- phosphate are element S and Pb（DTP）2. Using sequential selective flotation of galena with DTP as the collector in high alkalinity, the suitable dosage of DTP was above 10-3 mol/L, which would affect the selectivity,increase the costing and threaten the environment. The above shortages can be solved by mixture with Diethyldithiocarbamate（DDTC）. In addition, the suitable mass ratio was 1 ：1 at pH = 11.0, the commensurately dosage of DDTC was about 2. 2 ×10^-5 tool/L, DTP was about 2. 5 × 10^-5mol/L, the optimum pulp potential was about 0.2V.