粉体颗粒状态与流动性的关系.doc

青岛大学 PAGE I 摘要 本文以粉体颗粒状态与流动性的关系为研究重点，采用粉体特性综合测试仪，分别测试了8个粉体样品的休止角、平板角、松装密度、振实密度、分散度等参数，得到样品的Carr流动性指数，评价了8个样品的流动性；通过激光粒度分析仪测了粉体的平均径、中位径、峰值径以及累积百分率处粒子的粒径以及粒径分布；用图形图像分析仪测试分析了样品的粒形。对样品的流动性与粉体粒形、粒径及其颗粒分布的关系进行了分析。分析结果表明，8个样品流动性好坏依次为：2号1号4号5号3号6号8号7号。粉体的流动性与颗粒的球形度成正比，球形度越大，流动性越好。8个样品中2号球形度最大、流动性最好，7号球形度最小，流动性最差。 关键词：粉体 流动性 Carr指数 粒形 粒径 abstract This paper focuses on the research of the relationship between the powder particles state and liquidity, and respectively tests the angle of repose, flat angle, apparent density, tap density and dispersion and other parameters of eight samples. Carr index table is referred and Carr indexes are obtained. The liquidity performance of the eight samples in sequence is: No.2 No.1 No.4 No.5 No.3 No.6 No.8 No. 7. The median diameter, the number average diameter and the cumulative percentage of the particle size and size distribution of particles of the powder are measured by laser particle size analyzer. Besides, the particle shape of the sample is tested by image analyzer and analyzed. The results show that the liquidity of powder is in direct proportion to the spherical degree of particle, namely, the greater the spherical degree is, and the better liquidity is. In the eight samples, spherical degree of No. 2 is the largest and its liquidity is the best; spherical degree of No. 7 is the smallest and its liquidity is the worst. Keywords: Powder; Liquidity; Carr Index; Particle Shape; Particle Size 目录 TOC \o 1-3 \h \z \u HYPERLINK \l _Toc387069200 摘要 PAGEREF _Toc387069200 \h I HYPERLINK \l _Toc387069201 abstract PAGEREF _Toc387069201 \h II HYPERLINK \l _Toc387069202 0 引言 PAGEREF _Toc387069202 \h 1 HYPERLINK \l _Toc387069203 0.1 研究背景 PAGEREF _Toc387069203 \h 1 HYPERLINK \l _Toc387069204 0.2 粉体流动性的表征方法 PAGEREF _Toc387069204 \h 1 HYPERLINK \l _Toc387069205 0.3 粉体流动性的影响因素 PAGEREF _Toc387069205 \h 2 HYPERLINK \l _Toc387069206 1.实验样品与实验方法 PAGEREF _Toc387069206 \h 3 HYPERLINK \l _Toc387069207 1.1实验样品 PAGEREF _Toc38