【作者】 王燕民； EricForssberg；

【Author】 Yanmin Wang~(1,2) and Eric Forssberg~2 (1 College of Materials Science & Engineering,South China University of Technology,510640,Guangzhou,China 2 Department of Chemical Engineering and Geo-sciences,Lule University of Technology,S-971 87,Lule,Sweden)

【机构】 华南理工大学材材料科学与工程学院； DepartmentofChemicalEngineeringandGeo-seiences,LuleUniversityofTechnology；

【摘要】 采用一种工业型Poitternill高压辊磨系统在不同参数（如辊磨压力、辊周向速度和给料粒度）下对碳酸钙粉料进行工业规模的粉磨实验。利用所获取数据建立了磨机处理量、研磨效率以及能量利用效率与各参数之间的模型,其中,提出了能够在不同辊磨压力和辊周向速度下经系数修正的磨机的处理量模型。实验结果表明:在一定的辊磨压力下,侧向漏料与辊周向速度存在经验关系:磨机的两个主要参数（即辊磨压力和辊周向速度）均影响产品中位径(d₅₀)的大小,提高辊周向速度或降低辊磨压力可获得较粗的产品粒度。辊磨压力是影响磨机能量利用效率的主要因素,而给料粒度对粉磨效果的影响较小。当辊磨压力降低或辊周向速度增大时,Poittemill的粉磨能量利用率较高。另外,经实验所获得经验模型可以对与体系主要参数相关的Poittemill干式粉磨特性进行预测。建立的产品粒径与能耗的经验关系与所用粉磨参数无关。更多还原

【Abstract】 Experimental data were collected from tests using an industrial scale high pressure roller mill named the Poittemill grinding calcite particulate materials for a range of parameters（such as force pressure,circumferential speed of roll and feed size）. These data were used to develop models of throughput,size reduction and energy utilisation with the parameters.A performance model with a correction coefficient,which has been developed,is able to describe the Poittemill throughput at various force pressures and circumferential speed of rolls.The materials leaked beside the rolls are found to be empirically related to the circumferential speed of roll in a given force pressure.It is shown that two major parameters such as force pressure and circumferential speed of roll have an influence on the median size(d₅₀)of the ground product.The product fineness is decreased at a higher circumferential speed of roll or at a lower force pressure.The force pressure is the most dominant effect on the energy utilisation in the mill.The feed size used has a slight influence on the grinding results.Energy to the Poittemill for the comminution is utilised more efficiently at a lower force pressure or a higher circumferential speed of roll.Empirical models can predict the comminution characteristics with respect to the major parameters in the Poittemill system in dry mode.Product size-energy input relations have been also established,independent of the operating parameters used.更多还原