Urea
Granular urea 46%
Description
It is received from ammonia and carbon dioxide. Urea is the most concentrated nitrogen fertilizer. It contains Nitrogen in amide form, which in soil converts first into ammonium and then into nitrate forms. It is easily soluble in water. Using anti-caking agents ensures it is free-flowing during storing. Urea is not subject to RID or ADR regulations.
Usage
Urea is used in industry to manufacture pitches, glues, etc., for use in agriculture as mineral nitrogen fertilizer. Urea can be utilized in animal husbandry as a fodder additive.
Sulphur
Granular sulphur
Description
The granulation process uses a size enlargement process to transform molten sulphur into dense spherical solid granules. Small particles of sulphur (seed) are introduced at the feed end of the drum and are sprayed and coated with molten sulphur as the product moves toward the drum discharge. Each applied layer is cooled to solidification before another coat of molten sulphur is applied. With repeated application, bonding and then cooling of successive coats, the seeds increase in volume and weight until they reach the desired granule size, usually 1 to 6 mm in diameter. A screening process separates undersize granules from the product size granules, which allows the undersize to be recycled to the drum inlet as seeds.
Usage
Granulated sulphur is mainly used as a raw material to produce sulphuric acid, metal leaching and chemicals.
Lump sulphur
Description
The majority of sulphur that is transported around the world is done as a bulk solid. The sulphur is often stored in the open in huge stockpiles at terminals ready to be loaded onto ships, railcars, or trucks or at plant sites to be melted and used in the production of sulphuric acid. Most sulphur stockpiles are located outdoors in open where it is exposed to wind, rain, dust, salt air, etc. In some cases, sulphur is stored indoors where some protection from the elements is available.
Usage
Generally, lump sulphur is used in industrial plants.
Prilled sulphur
Description
In the wet sulphur prilling process, molten sulphur is pumped on to perforated trays that direct the sulphur in narrow streams into an agitated water bath. Pellets form as the sulphur comes in contact with the water. The low thermal conductivity, high specific heat, and long transformation time of sulphur make it necessary to maintain the pellets in suspension for as long as possible, allowing them to harden. This process produces spherical, uniformly sized, low moisture pellets.
Usage
Granulated sulphur is mainly used as a raw material to produce sulphuric acid, metal leaching and chemicals.
