螺旋分选机槽面颗粒分布特征研究  

Study of characteristics of particle distribution on trough surface of spiral separator

作　　者：赵一飞 李振[1,2] 陶亚东 朱子祺[3] 杨超[1] 刘莉君[1] 于伟[1] 屈进州[1] ZHAO Yifei;LI Zhen;TAO Yadong;ZHU Ziqi;YANG Chao;LIU Lijun;YU Wei;QU Jinzhou(College of Chemistry and Chemical Engineering,Xi′an University of Science and Technology,Xi′an 710054,China;Key Laboratory of Coal Resources Exploration and Comprehensive Utilization,Ministry of Natural Resources,Xi′an 710021,China;Washing Center,Shendong Coal(Group)Co.Ltd.,Shenmu 719315,China)

机构地区：[1]西安科技大学化学与化工学院,陕西西安710054 [2]自然资源部煤炭资源勘查与综合利用重点实验室,陕西西安710021 [3]神华神东煤炭集团有限责任公司洗选中心,陕西神木719315

出　　处：《选煤技术》2020年第1期12-17,共6页Coal Preparation Technology

基　　金：中国煤炭工业协会科学技术研究指导性计划资助项目(MTKJ 2017-306);陕西省自然科学基础研究计划资助项目(2018JQ5017);国土资源部煤炭资源勘查与综合利用重点实验室开放课题资助项目(ZKF2018-2)。

摘　　要：为了探究物料在螺旋分选机槽面上的分布状态,以神华集团大柳塔选煤厂粗煤泥为研究对象,采用5LL-Ф600型螺旋分选机分别对9种不同粒度组成的物料进行分选,并对各分选产物进行了分析。试验结果表明:螺旋分选机能够有效处理>0.125 mm粒级物料,但当物料粒度<0.125 mm时,其在螺旋分选机槽面上的分层和分带作用均不明显,不利于物料分选。在螺旋分选机槽面上,物料沿径向产生分层,轻物料在上层,重物料在下层;物料沿纵向产生分带,重物料在内侧,轻物料在外侧。在分选过程中,既存在按密度的分选作用,也存在按粒度的分级作用,入料粒度对分选效果有很大影响:入料粒级越宽,按粒度分级作用越强,越不利于物料按密度分选;入料粒级越窄,越适宜分选。In order to explore the pattern of distribution of materials on trough surface of spiral separator,test is made on separation of the coarse-grained coal slime with 9 different size compositions from Daliuta Coal Preparation using the 5LL-Ф600 spiral separator.Then the separated products respectively obtained are analyzed.As evidenced by test result,the>0.125 mm material can be effectively separated with the separator;when the material size is smaller than 0.125 mm,it is disadvangeous to its separation due to no distinctive material stratification and zoning effect on trough surface;the material tends to undergo stratification in the radial direction on trough surface with lighter particles in upper layer and heavier particles in lower layer;the material tends to become zonated in the longitudinal direction with the heavier particles on the inside and the lighter particles on the outside;and the separation process is effected according to both density and size.It is noted therefore the size range of the material can exert a great influence on result of material separation;the wider the size range,the greater the size classification effect,making the material more unfavorable for separation according to density;and the narrower the size range,the more suitable the material becomes for separation.

关 键 词：粗煤泥分选 螺旋分选机 截留取样 入料粒度 

分 类 号：TD942[矿业工程—选矿]