| 摘要 |
PURPOSE: A method for crushing and arranging rough jades for package is provided to pack the rough jades as a unit package for sale. CONSTITUTION: Rough jade masses are crushed in size of 4 to 5 cm. The crushed jades are injected into a rotational drum, and then the crushed jades are crushed with each other in the rotational drum to be blunt at the corners of jades. The crushed jades are injected into the rotational drum with grinding materials, and then the corners of the jades are rounded off by the frictional action with the grinding materials. The crushed jades(1) are heated on salts in a shell at the high temperature. The heated jades are collected from the salts for cooling. The collected jades are packed with vinyl as a unit package.
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