(中南大學(xué) 資源加工與生物工程學(xué)院，長(zhǎng)沙 410083)
摘 要: 研究了0~20 μm微細(xì)粒鈦鐵礦浮選中的自載體作用及機(jī)理。結(jié)果表明：鈦鐵礦浮選中粗細(xì)粒交互作用受二者相對(duì)含量影響顯著，粗粒載體比例達(dá)50%以上時(shí)體現(xiàn)出良好的自載體作用；在該浮選體系中，載體作用對(duì)載體粒度并不敏感，20~100 μm粒級(jí)可不經(jīng)分級(jí)直接作為載體；以載體浮選工藝處理攀枝花難處理微細(xì)粒鈦鐵礦實(shí)際礦石，與細(xì)粒礦物單獨(dú)浮選相比，0~20 μm粒級(jí)鈦鐵礦回收率由52.56%提高到61.96%。調(diào)漿前后的礦漿粒度分析及顆粒間相互作用計(jì)算表明，捕收劑在礦物表面吸附產(chǎn)生疏水力，從而使部分細(xì)粒粘附于載體，改善了礦漿粒度組成，優(yōu)化了浮選環(huán)境。
關(guān)鍵字: 鈦鐵礦；油酸鈉；自載體浮選
（School of Resources Processing and Bioengineering, Central South University, Changsha 410083, China）
Abstract: The autogenous-carrier effect in fine ilmenite (0−20 μm) flotation was investigated. The results show that the relative contents of the fine and coarse particles exert significant influence on the interaction between the fine and coarse particles, and good floatation effect can be realized when the carrier proportion is more than 50%. The floatability is insensitive to carrier size, and the coarse particles with size of 20−100 μm can be used as carrier without classification. Compared with the fine ilmenite separating flotation, the recovery rate of fine ilmenite with size of 0−20 μm increases from 52.56% to 61.96% by using autogenous-carrier flotation for Panzhihua ilmenite ore. Particle size distribution analysis before and after pulp condition and the calculation of interactions between particles show that the hydrophobic force produced by adsorption of collector leads to the adhesion of fine particle to carrier, and optimizes the environment of flotation.
Key words: ilmenite; sodium oleate; autogenous-carrier flotation
