Frequently Asked Questions

Circulate pre-coating liquid of diatomite again and again to make the first layer of diatomite deposited on the filter medium, and this process is called as pre-coating. Then make a spot of diatomite added into original liquid timely, which is called as addition. Along with process of filtration, the diatomite added mixes with impurities in the original liquid, depositing on the pre-coating layer, thus new pre-coating layers are formed constantly; as the diatomite particles are of natural cavernous structure, which can block off impurities in original liquid so as to accomplish purpose of solid-liquid separation. But the clear liquid may pass through easily and still keep higher flowing speed.

Diatomite filter-aid could be divided into constant-temperature dried products, calcined products and flux calcined products as per its production processing, and divided into for foods use and for industrial use in terms of its purpose.
The applicable equipments include: horizontal plate-frame filter, vertical vane filter, rotary vane filter, horizontal vane filter, horizontal disk filter and candle filter, all above equipments should be operated under positive pressure; and others include vacuum vane filter and vacuum rotary-drum filter, which should be operated under negative pressure.

Choosing right filter-aid model is crucial to success of use. Since it’s different of filter machine, operating environment and technical requirement for each factory, different models of filter-aid in our company could be chosen randomly on the basis of ensuring clear filter liquid and getting most filtration quantities. So generally on the premise of satisfying technical requirement, it is a must to search for maximal filtration speed, according to realize energy saving and effect enhancement at utmost.

“Tosens” brand diatomite filter-aid has chemical stability and doesn’t’ produce chemical change with the suspension except for the hydrofluoric acid and also is not soluble in fluid phase; moreover, it has low heavy metal content and doesn’t contain poor impurities, dyeing, sand grains and unpleasant odor. High-purity raw material, advanced production equipment and high-standard quality management system can fundamentally relieve the clients from worrying about the quality of diatomite filter-aid products.