摘要：以CEMⅡ/A-LL 32.5R型波特兰石灰石水泥为研究对象,基于Jenike理论与粉体流动测试仪,分析其流动函数与时间固结效应,并采用304/2B不锈钢、Tivar塑料、低碳钢、橡胶与聚四氟乙烯胶带共5种材料进行壁摩擦测试。结果表明:时间固结效应使得物料的流动性能变差;以304/2B不锈钢为壁面材料时水泥壁摩擦角最小;结合流动因子图与整体流料斗半顶角函数图,得出低碳钢制圆锥料斗、楔形料斗最大半顶角分别为5、15°,相应的最小开口尺寸即出口直径、出口缝宽分别为0.112、0.057 m。

关键词：Jenike 法；粉体流动测试仪；水泥；流动特性；料仓

Abstract：Flow functions and time consolidation effect of CEM Ⅱ/A-LL32.5R Portland limestone were analyzed based on Jenike theory and powder flow tester(PFT). Wall friction tests were carried out using five kinds of materials of 304/2B stainless steel,Tivar plastic,mild steel,rubber and PTFE tape. The results show that the flowability of materials becomes weak by time consolidation effect. The cement wall friction angle is the smallest taking 304/2B stainless steel as wall materials. According to diagrams of flow factor and overall flow hopper half angle function,the maximum half hopper angles of conical hopper and wedge hopper made by mild steel wall materials are respectively 5 and 15°,and the minimum open size that is outlet diameter and exit slit width are 0.112 and 0.057 m respectively.

Keywords: Jenike method；powder flow tester；cement；flowability；hopper