现在,苏联有40多家选煤厂使用过滤式离心脱水机对末中煤(13—0毫米)进行脱水。由于中煤中含矿物杂质较多,所以中煤的摩擦系数较大,属于难于运输的物料。这是中煤沿振动式过滤离心脱水机转子(母线倾斜角为10°)移动时被卡住的原因。 At the moment, more than 40 coal-mining plants in the Soviet Union use filter centrifugal de-watering machines to dehydrate the middle coal (13-0 mm). As the coal contains more mineral impurities, so the larger the friction coefficient of coal, are difficult to transport the material. This is why coal is stuck as it moves along the vibrating filter centrifuge rotor (with a generatrix inclination of 10 °).