(1. 中南大学 化学化工学院，长沙 410083；
2. 中南大学 有色金属资源化学教育部重点实验室，长沙 410083；
3. 重庆化工职业学院，重庆 400020)
摘 要: 通过考察N-丁氧丙基-N′-乙氧羰基硫脲(BOPECTU)对黄铜矿、黄铁矿和闪锌矿的浮选行为，研究其与Cu2+、Zn2+、Fe3+或Fe2+的作用及其在这3种硫化矿物表面的吸附机理。结果表明：BOPECTU可通过其分子中的硫和氮原子与溶液中的Cu2+作用而生成螯合物，而BOPECTU与Zn2+、Fe3+或Fe2+之间的作用较弱，实验条件下可能不存在化学作用。BOPECTU是黄铜矿的优良捕收剂，其浮选黄铜矿适宜的pH值范围为6.0~10.0，而其对黄铁矿和闪锌矿的捕收能力较弱。红外光谱结果表明，BOPECTU主要以化学作用方式吸附在黄铜矿表面，而其在黄铁矿和闪锌矿表面的吸附可能为物理吸附。
关键字: N-丁氧丙基-N′-乙氧羰基硫脲；吸附；浮选；硫化矿物
（1. School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China;
2. Key Laboratory of Resources Chemistry of Nonferrous Metals, Ministry of Education, Central South University, Changsha 410083, China;
3. Chongqing Chemical Industry Vocational College, Chongqing 400020, China）
Abstract:A new sulfide mineral collector, N-butoxypropyl-N′-ethoxycarbonyl thiourea (BOPECTU) was introduced, and its reaction with metal ions such as Cu2+, Zn2+, Fe3+ or Fe2+, its flotation performance to chalcopyrite, pyrite or sphalerite, and its adsorption mechanisms on the three sulfide mineral surfaces were investigated. The results show that BOPECTU reacts chemically with Cu2+ through its S and N atoms to form a new chelate compound, but no reaction of BOPECTU with Zn2+, Fe3+ or Fe2+ is observed under the same test conditions. BOPECTU is an excellent collector for chalcopyrite and the recommended pH values for chalcopyrite flotation are 6.0-10.0, while BOPECTU exhibits weak selectivity for pyrite and sphalerite. The results of IR spectra demonstrate that BOPECTU adsorbs on chalcopyrite surface mainly through chemisorption, and adsorbs on pyrite or sphalerite surfaces through physisorption.
Key words: N-butoxypropyl-N′-ethoxycarbonyl thiourea; adsorption; flotation; sulfide mineral
