■ The choosing of the filter cloth should meet the anticorrosion requirements, and appropriate filter cloth material should be chosen in accordance with the chemical properties of the separating material.

■ The number (model) of the pores on the filter cloth should be determined depending on the diameter the granules of the separating material. Generally, the size of the pore on the filter cloth should be slightly larger than the diameter of the granules to be intercepted. At the beginning of the filtration, there sill be a small quantity of small-sized granules penetrating the filter cloth. However, when the intercepted larger granules accumulate and form a cake layer, the penetrating phenomenon can be eliminated and the filtration efficiency will be improved.