... dehydration and unloading.Is a highly efficient solid-liquid separation in the separation equipment.Principles of product ... filter drum wall, under the centrifugal force, liquid materials through the filter and drum filter vent ... , polyvinylacohol, sodium thiosulphate, copper sulphate, potash, tarteric acid, crystal soda, potash alum, trisodium phosphate, potassium bicarbonate, zinc sulphate ...