煤基合成油及其乳化物在煤泥浮选中的应用研究

Application of coal⁃based synthetic oil and its emulsionin coal slime flotation

常用的浮选捕收剂柴油是不可再生资源,且属于危险化学品,因此寻找能够替代柴油的新型浮选捕收剂对绿色浮选具有重要意义。为了探索煤基合成油用于煤泥浮选的可行性,选取潞安煤基油公司基于费托合成技术生产的三种中间物作为浮选捕收剂,优选3#油样,使用司盘80和吐温80配制了不同油水比的乳化捕收剂,基于乳化捕收剂稳定性和显微分析,通过浮选试验、FTIR测试研究了乳化捕收剂的浮选性能。研究结果表明:在煤基合成油捕收剂中,3#油样浮选效果最好,浮选精煤产率仅比柴油降低了1个百分点左右;在3#油样配制的司盘系列和吐温系列乳化捕收剂中,吐温系列乳化捕收剂稳定性最好,一个月内仍未分层;在吐温系列乳化捕收剂中,以油水比为4∶6的乳化捕收剂浮选效果最好,且药剂用量少。

Diesel oil in common use as a collecting agent in flotation process is a kind of nonrenewable hazardous chemical product.Therefore,seeking a new⁃type collecting agent for replacing diesel oil is of great significance for effecting green flotation process.For exploring the feasibility of using coal⁃based syn⁃thetic oil as a collector in slime flotation,three intermediates material produced using Fischer⁃Tropsch process by Lu'an Coal⁃based Oil Company are selected for use as collecting agents,and through emulsifica⁃tion at different oil⁃water ratios using Span 80 and Polysorbate 80,an optimum 3#oil sample is prepared.Based on stability and microscopic analysis of emulsified collectors,the effect that can be obtained in flota⁃tion process with the emulsified agents are investigated through flotation test and FTIR analysis.Study re⁃sults shows that among the crude oil collectors,the 3#oil is the best in effect with the yield of flotation con⁃centrate product being only 1 percentage point lower than the case of using diesel oil;among the Span se⁃ries and Tween series emulsified collectors prepared with 3#oil,the latter series exhibits a best stability and can stay unstratified within one month;and among the Tween series,the use of collector emulsified at an oil/water ratio of 4∶6 can lead to a best flotation results with reduced consumption of the agent.