(1. 中南大學(xué) 化學(xué)化工學(xué)院，長沙 410083；
2. 中南大學(xué) 有色金屬資源化學(xué)教育部重點實驗室，長沙 410083；
3. 重慶化工職業(yè)學(xué)院，重慶 400020)
摘 要: 通過考察N-丁氧丙基-N′-乙氧羰基硫脲(BOPECTU)對黃銅礦、黃鐵礦和閃鋅礦的浮選行為，研究其與Cu2+、Zn2+、Fe3+或Fe2+的作用及其在這3種硫化礦物表面的吸附機理。結(jié)果表明：BOPECTU可通過其分子中的硫和氮原子與溶液中的Cu2+作用而生成螯合物，而BOPECTU與Zn2+、Fe3+或Fe2+之間的作用較弱，實驗條件下可能不存在化學(xué)作用。BOPECTU是黃銅礦的優(yōu)良捕收劑，其浮選黃銅礦適宜的pH值范圍為6.0~10.0，而其對黃鐵礦和閃鋅礦的捕收能力較弱。紅外光譜結(jié)果表明，BOPECTU主要以化學(xué)作用方式吸附在黃銅礦表面，而其在黃鐵礦和閃鋅礦表面的吸附可能為物理吸附。
關(guān)鍵字: N-丁氧丙基-N′-乙氧羰基硫脲；吸附；浮選；硫化礦物
（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
