Ammonium Nitrate Fattening & Granulation Desmet Ballestra proposes its in house Bi Fluid Drum Granulation (BFDG) technology for the following applications:
Ammonium nitrate and calcium ammonium nitrate fattening Ammonium nitrate or Calcium ammonium nitrate prills from the existing prilling tower are used as seed material and sprayed with ammonium nitrate or calcium ammonium nitrate melt in the Bi Fluid Drum Granulator (BFDG). It is one-through without recycle loop. Fattened prills are screened on a finishing screen and oversized particles are molten and recycled to the ammonium nitrate or calcium nitrate solution loop. The fattened prills are further cooled in a fluid bed cooler (using air) or in a static bulk flow cooler (using water). The process is used for: - Capacity increase of existing prilling plant - Product quality improvement (bigger product size, increased product hardness) - Air emissions improvements (decrease of air in prilling tower) The plant scheme allows to integrate a granulator with the existing prilling tower, upgrading product quality and reducing emissions with limited plant modification and investment. AN/CAN SCRUBBER PRILLING TOWER
AIR
BFDG
AN FILLER
SCREEN
FBC
COATING
AIR TANK
Characteristics of the final products AN/CAN fattening Water content %
0,3
Hardness kg on average D50
1 kg more than prill
Granulometry
Prill size increases by 1,26 factor
Nitrogen content %
From 34 to 26
Ammonium nitrate or calcium ammonium nitrate granulation The process is similar to ammonium nitrate or calcium nitrate fattening but the seed material is made from crushed product and there is a recycle loop to the granulator for the undersized material. The creation of seeds is an important part of the process and a specific roller crusher is used to obtain the seeds at the requested size. To get a better efficiency and yield, the inlet product to the crusher is cooled down. The quantity of the seeding material is on direct relation with the recycled back to the granulator product and is controlled automatically.
SCRUBBER
AIR
SCREEN
BFDG
AN FILLER
COATING
FBC
AN/CAN
AIR TANK
CRUSHER
Characteristics of the final products AN/CAN granulation Water content %
0,3
Hardness kg on average D50
3 min
Granulometry
2mm<95%<5mm
Nitrogen content %
From 34 to 26
Detergents Surfactants Soap & Chemicals
www.desmetballestra.com