混合非氰药剂对微细浸染型金矿浸出的影响研究

摘要

A laboratory leaching test was carried out for a micro⁃disseminated gold ore using mixed non⁃cyanide reagent. The process conditions were optimized as follows: firstly strengthened leaching was conducted with dosage of Q⁃1 and Q⁃3 at 50 kg/t and 105 kg/t, respectively, an aeration rate at 1.8 m3/h, liquid⁃solid ratio at 2, and agitation at room temperature for 24 h. After agitation, the slurry was directly leached using non⁃cyanide reagent SZS, with SZS dosage at 4.4%, Cu2+ concentration at 0.06 mol/L, NH3·H2O concentration at 1 mol/L, Na2SO3 concentration at 0.15 mol/L, liquid⁃solid ratio at 3, pH value at 10~11, with agitation at room temperature for 4 h. The test resulted in a leaching rate of 85.35%.%采用混合非氰药剂对某微细浸染型金矿进行了实验室浸出试验研究。优化后的工艺条件为：Q⁃1用量50 kg／t，Q⁃3用量105 kg／t，充气量1．8 m3／h，液固比2，常温搅拌24 h；搅拌后矿浆直接采用非氰药剂SZS浸出，浸出条件为：SZS用量4．4％，Cu2＋浓度0．06 mol／L，NH3·H2 O浓度1 mol／L，Na2 SO3浓度0．15 mol／L，液固比3，pH值10～11，常温搅拌4 h，在此条件下可获得金浸出率85．35％的指标。