Chemicals

Separation of phosphates in phosphoric acid production

Adaptation of Kroosh screens for control screening of phosphates with a moisture content of up to 20% eliminated clogging of reactors with stone debris, which significantly improved their performance and increased their service life between overhauls. Conventional screens are not used in this operation because of sieve blinding.

 

Reduction of operating costs and improvement of the finished product quality in fertilizers production

Multifrequency screens provide an opportunity to receive standardized high quality products while increasing the specific capacity of the screening equipment.

 

Preserving the flow rate of chemical powders during prolonged storage in bags

During long-term transportation or storage in bags, chemical powders tend to cake, compact, get pelletized, which impairs their consumer properties. To avoid this problem, it is enough to reduce the content of dust particles of a given size in the powder. The problem is solved by screening powders on a multifrequency screen before packaging. For example, in this way, it became possible to preserve the flow rate of TetrabromoBisPhenol powder (flame arrester based on bromine) by decreasing the content of particles smaller than 45 microns down to 15-17%.

 

Control screening of magnesium oxide powders on 120-300 µm sieves

Sifters are regularly used for control screening of powders at most of enterprises. Their use at an enterprise in magnesium oxide production revealed a number of shortcomings, in particular, the low reliability due to frequent sieve ruptures and agglomeration of powders on the working surface, high specific power consumption and expensive maintenance. All these drawbacks were eliminated after replacement of sifters by multifrequency screens while one screen substitutes 4 sifters by capacity and uses 3 times less energy.