Abstract:
Urea fertilizer is produced on a large scale – which therefore calls for a large-cale urea finishing section.
Prilling and granulation of urea have been proven on a large scale. Single train units can easily handle capacities up to 3500 metric tons per day.
However, many urea manufacturers experience difficulties producing prilled and/or granular products that meet product specifications on a consistent basis. This might be the result of operating the urea plant at a higher load than design capacity.
In this paper we focus on another proven finishing technology for urea production: Pastillization.
This technology is ideal for removing bottlenecks, for upgrading the prill tower or granulation section, or for the production of specialty urea products (UAS S-urea, micro nutrients). Premium quality pastilles can be produced for a low investment cost, low operating costs and with minimum (zero) emissions.
The Rotoform process offers high flexibility in urea production and opportunities to add value to your existing urea products, with low investment and operational costs, low energy consumption, negligible emission figures and premium product quality.
One or more Rotoform units can be added in parallel to the existing finishing system at any time. The Rotoform process is a good technical and economical method of debottlenecking or revamping existing urea finishing units. Furthermore, it’s possible to add value to the product by producing specialty fertilizers in a parallel line.
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