杂醇油制备煤泥浮选复合药剂的试验研究

Research on Preparation of Coal Slime Compound Reagent Made from Fusel Oil

基于杂醇油的性质特点,以杂醇油、0~#柴油为主要原料制备BM煤泥浮选复合药剂。通过正交试验确定药剂最佳制备条件为:0~#柴油与杂醇油质量配比为5∶1,乳化剂司班-80用量为杂醇油质量的5%,反应温度为60℃,时间为90 min。并用该BM复合药剂与常规浮选药剂做浮选对比试验,结果表明BM复合药剂最优用量为2.0 kg/t时,精煤产率比0~#柴油用量2.0 kg/t时高0.41%,可燃体回收率高0.83%,浮选完善指标高1.31%。润湿热测定表明BM复合药剂与煤样作用较强,能够稳固吸附在煤粒表面。红外吸收光谱分析知BM复合药剂在煤粒表面有机硫处以-S-S-形式吸附,BM复合药剂与煤粒的含氧官能团的极性基处吸附为化学吸附,复合药剂与煤粒表面能够形成氢键,有利于煤粒疏水性提高。

Based on the property and characteristic of fusel oil, This paper prepared BM compound reagent taking fusel oil and 0# diesel oil as raw material for coal slime flotation. The best preparation conditions determined by or- thogonal experiments were as follows ： the ratio of 0#diesel oil and fusel oil was 5 ： 1, emulsifier dosage of Span-80 was 5% of the mass of fusel oil,reaction temperature was 60 ℃ and reaction time was 90mintues. The results of the slime flotation test compared BM composite reagent with conventional flotation reagents showed that, when the opti- mal dosage of BM compound reagent was 2. 0 kg/t, yield of flotation concentrate, combustible recovery and flotation perfection index was higher by O. 41% ,0. 83% and 1.31% respectively than using the dosage 0# diesel oil was 2.0 kg/t. Measurement of wetting heat showed that the reaction between BM compound reagent with coal sample is stronger and BM compound reagent can absorb on coal surface firmly. Infrared spectrum analysis showed that BM composite reagent was absorb in organic sulfur on coal particle surface by-S-S-form and the reaction between it with polar group of oxygenic groups on coal sample is chemical adsorption and it can form hydrogen bonding with coal particle surface,which is advantageous to hydrophobicity of the coal slime.