絮凝剂、凝聚剂对低阶煤浮选效果的影响
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摘要
以内蒙古红庆河煤矿低阶煤为研究对象,分析了低阶煤的煤质特性。通过实验室浮沉试验、浮选试验,探究了在煤泥水沉降效果相同时,絮凝剂、凝聚剂以及两者组合使用时对低阶煤浮选效果的的影响。结果表明:单一使用凝聚剂对浮选效果影响较大,可燃体回收率减少了16.46个百分点;单一使用絮凝剂或絮凝剂和凝聚剂组合使用时,对浮选效果影响相对较小,可燃体回收率分别降低3.19、2.08个百分点;凝聚浮选、絮凝和凝聚组合浮选对精煤的灰分影响较小,分别增大0.85、0.98个百分点;絮凝浮选对精煤灰分影响较大,增加5.49个百分点。
An analysis is made of the property of the low-rank coal with the low-rank coal of Hongqinghe Coal Mine,Inner Mongolia,as the object of study.The effect of flocculating and coagulating agents and their combined use on performance of flotation of low-rank fine coal is investigated through laboratoryscale float-and-sink analysis and flotation experiment,under the conditions that the same slurry sedimentation effect is obtained through the use of either of the agents.As evidenced by test result,the use of coagulant alone produces a significant effect on flotation performance and the recovery of combustible matters is seen to be reduced by 16.46% while the use of flocculant alone or a combination of coagulant and flocculant produces a relatively slight influence on flotation performance and the recovery of combustible matter is reduced by 3.19% and 2.08% in respective case.And it is found that the use of coagulant or flocculant alone or combined use of the 2 kinds of agents exerts only a minor influence on clean coal ash which is increased respectively by 0.85% and 0.98% while the use of flocculant has a noticeable bearing on clean coal ash which is seen to be increased by 5.49% in this instance.
An analysis is made of the property of the low-rank coal with the low-rank coal of Hongqinghe Coal Mine,Inner Mongolia,as the object of study.The effect of flocculating and coagulating agents and their combined use on performance of flotation of low-rank fine coal is investigated through laboratoryscale float-and-sink analysis and flotation experiment,under the conditions that the same slurry sedimentation effect is obtained through the use of either of the agents.As evidenced by test result,the use of coagulant alone produces a significant effect on flotation performance and the recovery of combustible matters is seen to be reduced by 16.46% while the use of flocculant alone or a combination of coagulant and flocculant produces a relatively slight influence on flotation performance and the recovery of combustible matter is reduced by 3.19% and 2.08% in respective case.And it is found that the use of coagulant or flocculant alone or combined use of the 2 kinds of agents exerts only a minor influence on clean coal ash which is increased respectively by 0.85% and 0.98% while the use of flocculant has a noticeable bearing on clean coal ash which is seen to be increased by 5.49% in this instance.
引文
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[2]王辉.低灰细粒煤泥絮凝浮选试验研究[D].徐州:中国矿业大学,2016:2-3.
[3]郭世名,郭凤梅.凝聚剂与絮凝剂在杏花选煤厂煤泥水处理中的应用研究[J].煤炭技术,2008(2):109-111.
[4]何宗政,王振龙,陈建军.神东布尔台选煤厂煤泥水沉降复配药剂研究[J].选煤技术,2017(3):15-20.
[5]曹越.潘三选煤厂高泥化煤泥水絮凝沉降试验研究[J].选煤技术,2014(5):19-21.
[6]王永刚,周剑林,林雄超.低阶煤含氧官能团赋存状态及其对表面性质的影响[J].煤炭科学技术,2013,41(9):182-184,187.
[7]刘军伶,孟令柱.新田选煤厂煤泥水处理药剂的选择实践[J].选煤技术,2015(5):52-54.
[8]田全志,邢耀文,张义,等.浮选中煤絮凝浮选试验研究[J].煤炭技术,2015,34(12):265-267.
[9]崔广文,刘惠杰,朱付显,等.不同性质煤泥水的絮凝沉降试验研究[J].选煤技术,2009(4):28-30.
[10]闵凡飞,张明旭,朱金波.高泥化煤泥水沉降特性及凝聚剂作用机理研究[J].矿冶工程,2011,31(4):55-58.
[11]李飞,师文虎,杜焕铜,等.腾庆选煤厂煤泥水絮凝沉降特性试验研究[J].选煤技术,2016(5):15-18.
[12]范玮.高浓度煤泥水絮凝实验及分形理论的研究[J].洁净煤技术,2013,19(4):29-32,36.