(中南大學(xué) 資源加工與生物工程學(xué)院， 長沙 410083)
摘 要: 研究了N-(3-氨丙基)-月桂酰胺對高嶺石、 伊利石和葉蠟石的浮選性能。 結(jié)果表明： N-（3-氨丙基）-月桂酰胺對這些鋁硅酸鹽都有較好的捕收性能， 對高嶺石、 伊利石和葉蠟石的回收率分別在91%， 90%和96%以上。 礦漿pH值對3種礦物的可浮性影響較小， 在一個較寬的pH范圍內(nèi)， 3種礦漿的Zeta電位均為負(fù)值， 礦粒表面荷負(fù)電。 紅外光譜證明， 3種礦物中均含有—OH基。 酸性介質(zhì)中， 捕收劑分子通過靜電引力吸附在礦粒表面； 堿性介質(zhì)中，捕收劑分子通過氫鍵吸附在礦粒表面。 礦粒的掃描電鏡照片表明： 葉蠟石顆粒主要呈薄片狀； 伊利石和高嶺石顆粒呈不規(guī)則形狀。
關(guān)鍵字: 鋁硅酸鹽礦物； N-(3-氨丙基)-月桂酰胺； 浮選； 吸附
（1. School of Resources Processing and Bioengineering,
Central South University, Changsha 410083, China;
2. Technology Development and Exchange Center of Nonferrous Metallurical Industry,Beijing 100841, China）
Abstract: The effects of sulfide minerals such as sphalerite, pyrite, ganela, chalcopyrite and sulfur on the growth and activity of wild and adapted acidithiobacillus ferrooxidans were studied under the common bioleaching condition of 30℃ and pH2.0. Experimental results show that the rates of oxidizing Fe2+ decrease in the 9K medium which contains sulfide minerals at four kinds of pulp density(0.25%，0.50%，0.75%，1.0%) respectively. This means that sulfide minerals used in this experiment have effects on the growth and activity of wild and adapted acidithiobacillus ferrooxidans.
Key words: sulfide minerals; pulp density; acidithiobacillus ferrooxidans; oxidation activity; bad effect
