捕收剂烯丙基异丁基硫氨酯在硫化铜矿表面的吸附机理

烯丙基异丁基硫氨酯(ATC)是新一代酯类选矿药剂,它对黄铜矿捕收力强,黄铁矿捕收力弱,是铜硫分离的优良捕收剂。为了考察ATC对黄铜矿和黄铁矿分离的影响及吸附机理,在纯矿物浮选试验的基础上,进行了动电位、吸附量测量试验和红外光谱分析。结果表明,ATC在试验pH范围内对黄铜矿的捕收能力强于对黄铁矿的捕收能力;ATC的捕收力及选择性均强于传统捕收剂Z-200;在pH=9.0、ATC用量为11.8 mg/L时,黄铜矿与黄铁矿回收率相差55个百分点;矿浆pH对黄铜矿可浮性影响较小,对黄铁矿可浮性影响大;ATC用量对黄铜矿电位影响大,对黄铁矿电位影响小;红外光谱分析表明ATC在黄铜矿表面是化学吸附,在黄铁矿表面是物理吸附。

Adsorption Mechanism of Collector Allyl Isobutyl Thionocarbamate on the Surface of Copper Sulphide

Allyl isobutyl thionocarbamate (ATC) is a new generation of ester concentration agent which has strong collecting force on chalcopyrite and weak force on pyrite.It is an excellent collector for separation of copper sulphide and pyrite.The zeta potential,the adsorption measurement tests,and the infrared spectrum analysis were made to detect the separating effect of ATC on chalcopyrite and pyrite and the absorption mechanism,based on the floatation tests of pure minerals.The results showed that：Within the test pH range,ATC floating ability on chalcopyrite was stronger than that on pyrite.The collecting force and selectivity of collector ATC are better than that of traditional collector Z-200.With the dosage of ATC 11.8% in pH value 9.0,recovery rate of chalcopyrite differed from that of pyrite by 55 percentage point.The slurry pH value has less impact on chalcopyrite floatability and more impact on that of pyrite；The dosage of ATC has more impact on the zeta potential of chalcopyrite and less impact on that of pyrite.Infrared spectrum analysis showed that：the adsorption of ATC on chalcopyrite surface belongs to chemical adsorption and that on pyrite belongs to physical adsorption.