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《China Powder Science and Technology》 2006-04
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Design of High Precision Measuring Apparatus for Stopping Angle of Powder

LIU Rui ZHAO Xu-guang ZHAO San-yin CAI Xi-chun (School of Chemical and Environmental Engineering,Shaoguan University,Shaoguan 512005,China)  
Powder's stopping angle (PSA) is an important performance factor about powder's mechanics,but its measured data generally shows a large undulation with traditional measuring method.In order to solve the problems,a new improved measuring apparatus of PSA was designed and made.The new apparatus added a high-speed spinning brash to predisperse measured powder before it falls.So it could avoid the aggregation of particles and decrease the vibration and shock forces caused by the falling powder effectively.A rounded platform was set under powder funnel to limit the dimension of powder's cone.Two series of steel slag with different fineness were used in contrasting tests between the new and traditional apparatus.The results indicated that the new apparatus,with a simple structure,had higher measuring speed and measuring accuracy than traditional apparatus,and RSD was decreased from 5.61% to 1.73%.
【Fund】: 韶关市科委2000年重大应用研究项目,编号:韶市科字(2000)50号。
【CateGory Index】: TB44
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