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1961 Rissman 2979421 Granulation Process

This inventions describes a granulation process which enables the production of urea product with a lower biuret content than prills.
The seeds are built up with a low biuret urea solution under temperatures which are relatively mild (100 degC). A bleed of high biuret fines controls the biuet content of the end product.
Also a recycle of oversized product by means of  crusher and screen is described.

 

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