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Large Volume Inorganic Chemicals - Ammonia ... - ammk-rks.net

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Chapter 77.4.2 Particle formation (1): spherodiserDescriptionGranulation of slurries produced by phosphate rock digestion is often carried out inspherodisers. The spherodiser process combines granulation and drying in a single process step.It consists of an inclined rotary drum, divided into a granulation and a drying zone.Undersized and crushed oversize material particles are recycled to the granulation zone(granulation loop). The recycled particles generate a moving bed in the drum, into which theslurry containing 10 – 20 % water is sprayed. Air is preheated with gas burners up to 400 ºC andflows co-currently through the spherodiser evaporating the water and building up dry granuleswith a water content of

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