基于正交试验设计的煤泥浮选工艺试验研究
|
摘要
汪家寨选煤厂煤泥含量大、灰分较高,在-0.5mm粒级煤泥混合浮选工艺中出现了跑粗或细泥夹带现象。为了充分回收煤泥中的可燃体,利用煤泥筛分、浮沉试验及分步释放试验对该厂的煤泥性质进行了分析,采用正交试验设计方法分别对煤泥混合浮选、分级浮选与二次浮选3种流程进行试验研究。研究结果表明,二次浮选工艺最适宜该厂的煤泥浮选,可有效降低高灰细泥对精煤的影响,降低浮精灰分;该厂最佳浮选条件为煤泥入浮浓度为80g/L、煤油耗量为240g/t、2号油耗量为120g/t,浮选完善指标为45.63,浮选精煤产率为69.93%,灰分为11.88%,各因素的主次关系为2号油耗量>煤泥入浮浓度>煤油耗量。
Coal slime content and ash content is high in Wangjiazhai Coal Preparation Plant,in-0.5 mm graded coal slime mixed flotation process,it often appeared coarse or fine mud entrainment phenomenon.In order to fully recover combustible materials in the coal slime,the properties of coal slime in this plant were analyzed by slime sieving test,float and sink test and step release test,and three flotation processes of coal slime mixed flotation,classification flotation and secondary flotation were tested and studied by orthogonal experimental design method.The results show that the secondary flotation process is the most suitable for coal slime flotation in the plant,which can effectively reduce influence of high ash fine slime on cleaned coal and the ash content of the flotation cleaned coal.The optimum flotation conditions of the plant are coal slime concentration of 80 g/L,kerosene consumption of 240 g/t and No.2 oil consumption of 120 g/t,improved flotation index of 45.63,flotation cleaned coal yield of 69.93%,ash content of 11.88%,the primary and secondary relationship of each factor is No.2 oil consumption>coal slime flotation concentration> kerosene consumption.
Coal slime content and ash content is high in Wangjiazhai Coal Preparation Plant,in-0.5 mm graded coal slime mixed flotation process,it often appeared coarse or fine mud entrainment phenomenon.In order to fully recover combustible materials in the coal slime,the properties of coal slime in this plant were analyzed by slime sieving test,float and sink test and step release test,and three flotation processes of coal slime mixed flotation,classification flotation and secondary flotation were tested and studied by orthogonal experimental design method.The results show that the secondary flotation process is the most suitable for coal slime flotation in the plant,which can effectively reduce influence of high ash fine slime on cleaned coal and the ash content of the flotation cleaned coal.The optimum flotation conditions of the plant are coal slime concentration of 80 g/L,kerosene consumption of 240 g/t and No.2 oil consumption of 120 g/t,improved flotation index of 45.63,flotation cleaned coal yield of 69.93%,ash content of 11.88%,the primary and secondary relationship of each factor is No.2 oil consumption>coal slime flotation concentration> kerosene consumption.
引文
[1]倪超,谢广元,蒋兆桂,等.煤泥“2+2”分选工艺的问题分析及优化试验[J].煤炭学报,2013,38(11):2035-2041.NI Chao,XIE Guangyuan,JIANG Zhaogui,et al.Problem analysis and optimization test for"2+2"coal slime separation process[J].Journal of China Coal Society,2013,38(11):2035-2041.
[2]桂夏辉,邢耀文,李臣威,等.煤泥浮选过程中黏土矿物罩盖及其行为调控[J].煤炭科学技术,2016,44(6):175-181.GUI Xiahui,XING Yaowen,LI Chenwei,et al.Clay coating and its behavior regulation in fine coal flotation[J].Coal Science and Technology,2016,44(6):175-181.
[3]谢广元.选矿学[M].徐州:中国矿业大学出版社,2001.
[4]郭德,张秀梅,吴大为,等.脱泥浮选工艺的实践与认识[J].煤炭学报,2000,25(4):208-211.GUO De,ZHANG Xiumei, WU Dawei,et al.Practice and view of deshime floatation technology[J].Journal of China Coal Society,2000,25(4):208-211.
[5]桂夏辉,程敢,刘炯天,等.异质细泥在煤泥浮选中的过程特征[J].煤炭学报,2012,37(2):301-309.GUI Xiahui,CHENG Gan,LIU Jiongtian,et al.Process characteristics of heterogeneous fine mud in the coal flotation[J].Journal of China Coal Society,2012,37(2):301-309.
[6]牛勇,王怀法.难浮煤泥浮选工艺研究[J].洁净煤技术,2011,17(3):6-8.NIU Yong,WANG Huaifa.Research on flotation process of difficult-to-float coal[J].Clean Coal Technology,2011,17(2):6-8.
[7]宋万军,蒋涵元,朱子祺.上榆泉选煤厂煤泥浮选提质的可行性研究[J].煤炭科学技术,2015,43(11):170-174.SONG Wanjun, JIANG Hanyuan, ZHU Ziqi.Feasible study on coal slime flotation to improve coal qualityandefficiencyinShangyuquanCoal Preparation Plant[J].Coal Science and Technology,2015,43(11):170-174.
[8]宋云霞,魏昌杰.难浮煤泥二次浮选工艺研究与应用[J].煤炭工程,2017,49(7):93-96.SONG Yunxia, WEIChangjie. Researchand application of secondary flotation process for hard-tofloat fine coal[J].Coal Engineering,2017,49(7):93-96.
[9]于伟,李振,刘莉君.细粒煤泥分级浮选试验探讨[J].矿山机械,2014,42(4):93-96.YU Wei, LI Zhen, LIU Lijun.Test study on classified flotation of fine coal slime[J].Mining&Processing Equipment,2014,42(4):93-96.
[10]张龙鑫,效妍,倪超.高灰难浮煤泥二次浮选试验研究[J].煤炭工程,2014,46(2):22-24.ZHANG Longxin, XIAOYan, NIChao.Experimental study on secondary floatation of high ash difficult floated slime[J].Coal Engineering,2014,46(2):22-24.
[11]刘炯天,樊民强.试验研究方法[J].徐州:中国矿业大学出版社,2011.
[12]马超,王文宾,董连平,等.常村煤矿选煤厂煤泥浮选药剂制度优化研究[J].选煤技术,2018(2):27-29.MA Chao,WANG Wenbin,DONG Lianping,et al.Optimization of the coal slime flotation reagent regime at Changcun Mine Coal Preparation Plant[J].Coal Preparation Technology,2018(2):27-29.
[13]赵兵兵.煤泥浮选工艺影响因素研究[J].洁净煤技术,2018,24(2):31-34.ZHAO Bingbing.Factors affecting flotation process of coal slime[J].Clean Coal Technology,2018,24(2):31-34.
[14]任瑞晨,陈康,王国良,等.浮选尾煤脱泥再选及其可浮性评价[J].洁净煤技术,2017,23(6):32-37.REN Ruichen,CHEN Kang,WANG Guoliang,et al.Recleaning of coal flotation tailings desliming and floatability evaluation[J].Clean Coal Technology,2017,23(6):32-37.
[2]桂夏辉,邢耀文,李臣威,等.煤泥浮选过程中黏土矿物罩盖及其行为调控[J].煤炭科学技术,2016,44(6):175-181.GUI Xiahui,XING Yaowen,LI Chenwei,et al.Clay coating and its behavior regulation in fine coal flotation[J].Coal Science and Technology,2016,44(6):175-181.
[3]谢广元.选矿学[M].徐州:中国矿业大学出版社,2001.
[4]郭德,张秀梅,吴大为,等.脱泥浮选工艺的实践与认识[J].煤炭学报,2000,25(4):208-211.GUO De,ZHANG Xiumei, WU Dawei,et al.Practice and view of deshime floatation technology[J].Journal of China Coal Society,2000,25(4):208-211.
[5]桂夏辉,程敢,刘炯天,等.异质细泥在煤泥浮选中的过程特征[J].煤炭学报,2012,37(2):301-309.GUI Xiahui,CHENG Gan,LIU Jiongtian,et al.Process characteristics of heterogeneous fine mud in the coal flotation[J].Journal of China Coal Society,2012,37(2):301-309.
[6]牛勇,王怀法.难浮煤泥浮选工艺研究[J].洁净煤技术,2011,17(3):6-8.NIU Yong,WANG Huaifa.Research on flotation process of difficult-to-float coal[J].Clean Coal Technology,2011,17(2):6-8.
[7]宋万军,蒋涵元,朱子祺.上榆泉选煤厂煤泥浮选提质的可行性研究[J].煤炭科学技术,2015,43(11):170-174.SONG Wanjun, JIANG Hanyuan, ZHU Ziqi.Feasible study on coal slime flotation to improve coal qualityandefficiencyinShangyuquanCoal Preparation Plant[J].Coal Science and Technology,2015,43(11):170-174.
[8]宋云霞,魏昌杰.难浮煤泥二次浮选工艺研究与应用[J].煤炭工程,2017,49(7):93-96.SONG Yunxia, WEIChangjie. Researchand application of secondary flotation process for hard-tofloat fine coal[J].Coal Engineering,2017,49(7):93-96.
[9]于伟,李振,刘莉君.细粒煤泥分级浮选试验探讨[J].矿山机械,2014,42(4):93-96.YU Wei, LI Zhen, LIU Lijun.Test study on classified flotation of fine coal slime[J].Mining&Processing Equipment,2014,42(4):93-96.
[10]张龙鑫,效妍,倪超.高灰难浮煤泥二次浮选试验研究[J].煤炭工程,2014,46(2):22-24.ZHANG Longxin, XIAOYan, NIChao.Experimental study on secondary floatation of high ash difficult floated slime[J].Coal Engineering,2014,46(2):22-24.
[11]刘炯天,樊民强.试验研究方法[J].徐州:中国矿业大学出版社,2011.
[12]马超,王文宾,董连平,等.常村煤矿选煤厂煤泥浮选药剂制度优化研究[J].选煤技术,2018(2):27-29.MA Chao,WANG Wenbin,DONG Lianping,et al.Optimization of the coal slime flotation reagent regime at Changcun Mine Coal Preparation Plant[J].Coal Preparation Technology,2018(2):27-29.
[13]赵兵兵.煤泥浮选工艺影响因素研究[J].洁净煤技术,2018,24(2):31-34.ZHAO Bingbing.Factors affecting flotation process of coal slime[J].Clean Coal Technology,2018,24(2):31-34.
[14]任瑞晨,陈康,王国良,等.浮选尾煤脱泥再选及其可浮性评价[J].洁净煤技术,2017,23(6):32-37.REN Ruichen,CHEN Kang,WANG Guoliang,et al.Recleaning of coal flotation tailings desliming and floatability evaluation[J].Clean Coal Technology,2017,23(6):32-37.
© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号 地址：北京市海淀区学院路29号 邮编：100083 电话：办公室：(+86 10)66554848；文献借阅、咨询服务、科技查新：66554700 |