School of Chemistry and Chemical Engineering,Xi'an University of Science and Technology School of Chemical
Engineering,China University of Mining and Technology

基于低阶煤表面含氧官能团多,疏水性差,煤泥难以浮选的问题,实验室条件下自行设计油泡分选系统,通过试验研究探讨低阶煤煤泥油泡浮选提质的可行性。常规浮选试验研究表明:当煤油用量低时,可燃体回收率低,浮选指标差,只有加入大剂量如100 kg/t的煤油时,才能取得较好的浮选指标。采用烃类油闪蒸技术制造油泡,可以有效地对低阶煤煤泥进行分选,捕收剂耗量大幅降低,且浮选指标好;捕收剂用量为2.5 kg/t时,大柳塔煤泥精煤产率为82.38%,灰分为8.26%,石圪台煤泥精煤产率为69.28%,灰分为11.14%。通过油泡浮选技术对低阶煤煤泥进行浮选提质,将为低阶煤煤泥的资源化利用探索提供参考。

Based on many oxygen- contained functional groups on low rank coal surface,poor hydrophobicity and slime hard to be floated problems,under lab conditio n,an oil- bubbles separation system was designed. With the experiment study,the paper discussed the feasibility of the low rank coal upgrading with slime oil- bubbles float ation. The conventional floatation experiment study showed that when the kerosene dosage was low,the recovery rate of the combustible liquid could be low and he floatati on index would be poor. Only when a large dosage of the kerosene,as 100 kg 1 t was added,a good floatation index could be obtained. The oil bubbles prepared with the hy drocarbon oil flash evaporation technology applied could effectively separate the low rank coal of the slime,the consumption of the collectors could be highly reduced and t he floatation index would be good. When the collector quantity was 2. 5 kg 1 t,the clean coal production yield of the slime in Daliuta Mine would be 82. 38% and the ash con tent would be 8. 26%. The clean coal production yield of the clean coal in Shigetai Mine would be 69. 28% and the ash content would be 11. 14%. The oil bubbles floatation technology applied to the floatation and upgrading to the low rank coal of the slime could provide references to the discovery on resource utilization of low rank coal of the slime.

国家重点基础研究发展计划(973计划)资助项目(2012CB214905)；西安科技大学培育基金资助项目(2014023)；