我国西北地区的无烟煤储量较少，而烟煤热解产生半焦大量囤积。利用干法超细粉碎分选技术可以提高这两种不对称资源的利用效率，并开拓低灰超细煤粉体在煤基复合材料，高性能碳材料等方面的应用。目前，将超细粉碎与分选一体化方法的开发研究较少。本文以太西无烟煤（TX）和神府半焦（SFS）为原料，研究冲击式粉碎和流化床气流粉碎串联工艺的分选提质特性。首先对两种原料在冲击式粉碎机中的解离特性进行了研究，然后在冲击式粉碎分级工艺优化的基础上，探究了太西无烟煤在流化床气流粉碎分级装置上的原位改性粉碎效果。通过CFD模拟与实验对比，实现对流化床气流粉碎特性的解析。 （1）以冲击式粉碎机粉碎强度对太西煤和神府半焦中无机矿物质解离特性的影响为出发点，分别以太西无烟煤和神府半焦为试验样，探究不同粉碎强度下各产品产率的变化规律、灰分分布特性。结合产品的显微光片分析可知：嵌布在煤中的硬质矿物首先完整解离；而嵌布粒度细，分散均匀的粘土类矿物随粉碎粉体粒度减小部分解离。太西无烟煤和神府半焦中的矿物嵌布可以促进裂纹扩展，且沿有机体和无机矿物界面的扩展有利于无机矿物质的解离。 （2）进一步探究冲击式粉碎-分级条件参数对产品灰分分布、粒度分布的影响规律，并分别优化出符合太西无烟煤和神府半焦的粉碎-分级工艺条件。结果表明，太西无烟煤和神府半焦具有相同的优化参数条件：冲击式粉碎机转速2900r/min、分级机转速700r/min、引风机风量0.75Q1 m3/min、进气口风量0.5Q2 m3/min 参数条件，并在最优条件下所得分级机产品的灰分分别为1.81%和5.81%，产率分别为24.90%和24.17%。 （3）以冲击式粉碎-分级工艺所得太西无烟煤分级机产品为基础实验样，探究了流化床气流粉碎-分级对太西无烟煤的降灰特性影响。通过参数优化和马来酸酐（MAH）改性建立流化床气流粉碎-分级-分选方法。在最优工艺参数条件下，MAH用量为1%时，实现了太西无烟煤的深度脱灰效果，Ad=1.47%。说明干法超细粉碎分级工艺是煤炭有效脱灰的方法之一。 （4）通过流化床气流粉碎腔体的CFD模拟，对比试验结论分析了流化床气流粉碎特性。以实际工艺参数为模拟条件，经单相（气相）拟合分析，理论模拟与实验结果趋于一致。粉碎压力在0.3MPa时，经喷嘴进入粉碎区的气相衰减最小，能有效促进中心粉碎区的粉碎效果。

There are fewer anthracite reserves, and there is a lot of hoarding of the semi-coke from Bituminous coal pyrolysis in northwest china. It is helpful for improving the efficiency of these two resources and exploring the application of their ultrafine powder with low ash in the area of coal based composite, high-performance carbon materials and so on. At present, the research and development of ultra-fine grinding and separation integration is less. Using Taixi (TX) anthracite and Shenfu semi-coke(SFS) as the raw materials, the separation and upgrading quality characteristics of horizontal high speed impaction superfine crushing and the fluidized bed crushing has been researched. At first, the dissociation characteristic of the two materials has been studied by horizontal high speed impaction superfine mill. On the basis of optimization of the horizontal high speed impaction superfine and classification technology, it has been explored that the situ modification effect of TX anthracite by using fluidized bed crushing and classification system. Through the comparison of CFD simulation and experiments, the crushing characteristics of fluidized bed jet mill have been analyzed. (1) Starting with the dissociate characteristics research of the inorganic minerals and the Taixi anthracite coal or Shenfu semi-coke on the impact crushing strength, the variation of the yield of each product and the distribution characteristics under different crushing strength has been explored. Combined the products SEM analysis, it has been disseminated that the hard minerals completely dissociate firstly, and disseminated fine grain size, dispersed clay mineral powder partially dissociate with particle size reduction. The minerals from the sample can promote the crack propagation each other. (2) Explore the relationship between the condition parameters of horizontal high speed impaction superfine and classification crafts and the product distribution, particle size distribution on the basis of dissociation. The results show that the TX anthracite and the SFS semi-coke have the same process parameters by the horizontal high speed impaction superfine mill and grader: rotational speed of the horizontal high speed impaction superfine mill is 2900r/min, rotational speed of the grader is 700r/min, air volume of the induced draft fan is 0.75Q1m3/min, air volume of the gas inlet is 0.5Q1m3/min. ash of the two samples is 1.81% and 5.81%, the yield of the two samples is 24.90% and 24.17%, under the best parameters and the 1.0% amount of MAH. (3) Using classification products gotten from horizontal high speed impaction superfine and classification system as the basic samples of further experiments, the ash reduction characteristics of fluidized bed crushing and classification system have been explored. The method of fluidized bed jet mill classifier and separation has been established through parameters optimization and maleic anhydride (MAH) modification. Under the best technological parameters condition, depth ash reduction effect of Taixi anthracite (Ad=1.47%) could be achieved while the MAH dosage is 1.0% which means that dry method of superfine crushing and classification technology is one of the effective methods to realize ash reduction of coal. (4) The crushing characteristics of fluidized bed jet mill have been analyzed contrasting experiment conclusions by CFD simulation of cavity in fluidized bed jet mill. Setting actual process parameters as the simulation conditions, the theoretical simulation results and experiment results tend to be the same by single phase (gas phase) fitting analysis. When the crushing pressure is 0.3MPa, the gas phase falloff through jet nozzle into crushing area is the lowest, which can promote the crushing effect of central crushing area.