1. 物料容重:γ=0.2-1.8吨/立方米
Material bulk density: γ=0.2-1.8t/m3
2. 温度: 物料温度t＜100度c
Temperature: Material temperature t＜100oC
3. 含水率: 对于一般物料，不得使物料用手捏成团后不易松散，对于含水率认加后会加大粘着性和压给性的物料，不能使物料严重粘附刮版。
Water ratio: For common materials, they should not be easily loose after squeezed into cluster by hand. For the materials that the adhesivity and press-feedbility would increase after add water ration, they should not be adhere to scraper badly.
4.  粒度: 物料的粒度与其硬度有关，粒度太大. 则不宜输送. 对物料粒度的要求见下表。
输送物料的粒度(毫米)
   Granularity: The materials’ granularity is related to their rigidity, if the granularity is too high, it is not easy for transporting. The requirement of materials’ granularity is as follows: