油页岩重介分选设备及工艺参数的研究

发布时间：2018-06-19 23:05

本文选题：高密度分选 + 双锥重介旋流器　；参考：《煤炭科学研究总院》2017年硕士论文

【摘要】：本研究的目的是通过对油页岩的重介旋流器分选试验,研究适于高密度矿物分选的重介质悬浮液性质和旋流器结构参数,为将重介质选煤技术拓展到非煤高密度矿物分选领域(金属矿或非金属矿)提供理论和试验依据。(1)粘度试验。通过试验研究高密度(密度在1.8g/cm3以上)悬浮液在不同密度,不同矿泥含量时粘度的变化情况。方差分析显示无论是硅铁粉悬浮液还是磁铁粉悬浮液,密度和矿泥的含量对粘度都有高度显著的影响。硅铁粉悬浮液的粘度在相同密度、矿泥含量条件下明显低于磁铁粉悬浮液。(2)将传统的DSM型重介旋流器由单一锥段改成上、下锥角不同的两个锥段,上锥段采用大锥角增大分选密度,下锥段采用小锥角增长分选区间。上锥段锥角有80°和60°两种选择,下锥段有30°和20°两种选择,两两组合就共有四种组合,运用数值模拟软件Fluent对四种组合的旋流器进行模拟对比发现,上锥段80°、下锥段为30°的旋流器在分选区域拥有更大的切向速度,压降更小。将该双锥旋流器与单锥旋流器相比上述优势依然存在。(3)采用重介旋流器对油页岩进行了实验室分选试验,证明采用重介方法对油页岩进行分选工艺上是可行的。
[Abstract]:The purpose of this study is to study the properties of heavy medium suspensions and the structure parameters of hydrocyclone suitable for high density mineral separation through the separation test of heavy medium hydrocyclone for oil shale. It provides a theoretical and experimental basis for viscosity test in the field of high-density mineral separation (metal ore or non-metallic ore) for the application of heavy medium coal preparation technology to non-coal high-density mineral separation field. The viscosity of high density (above 1.8g/cm3) suspensions with different density and different slime content was studied by experiment. The variance analysis shows that the density and the content of ore mud have a highly significant effect on the viscosity of both ferrosilicon and magnetite suspensions. The viscosity of ferrosilicon suspension is obviously lower than that of magnet powder suspension at the same density and the mineral mud content.) the traditional DSM type heavy medium cyclone is changed from a single cone to an upper cone with two cones with different lower cone angles. The upper cone increases the separation density with a large cone angle, and the lower cone increases the separation interval with a small cone angle. The upper cone angle is 80 掳and 60 掳, the lower cone is 30 掳and 20 掳, and there are four combinations. The numerical simulation software fluent is used to simulate and compare the four kinds of combined hydrocyclone. The cyclone with 80 掳of upper cone and 30 掳of lower cone has larger tangential velocity and smaller pressure drop in the sorting area. Compared with the single cone cyclone, the double cone hydrocyclone still has the advantages mentioned above. (3) the heavy medium cyclone is used to separate the oil shale in the laboratory, which proves that it is feasible to use the heavy medium method to separate the oil shale.
【学位授予单位】：煤炭科学研究总院
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TD922;TD45

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