PROCESSO PER LA GRANULAZIONE DI SALI POTASSICI

PROCESSO PER LA GRANULAZIONE DI SALI POTASSICI

Disclosed is a process for granulating potassium salts, which comprises: a) preparing a bentonite gel by mixing (A) bentonite (1) with water (2) in a water:bentonite ratio of from 5:1 to 15:1, and adding a potassium salt (4) to said gel at 60 to 80 DEG C; b) feeding the slurry obtained in step (a) i...

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Bibliographische Detailangaben
Hauptverfasser: NARDON DANILO, SILVESTRIN LEONARDO, FORTIBUONI RAFFAELLO, COCQUIO FABRIZIO
Format: Patent
Sprache:ita
Schlagworte:
CHEMISTRY
COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM,RUBIDIUM, CAESIUM, OR FRANCIUM
COMPOUNDS THEREOF
FERTILISERS
FERTILISERS CHARACTERISED BY THEIR FORM
FERTILISERS PRODUCING CARBON DIOXIDE
INORGANIC CHEMISTRY
INORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C
MANUFACTURE THEREOF
METALLURGY
MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENTSUBCLASSES OF CLASS C05
MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVINGA SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES,SOIL-CONDITIONERS, WETTING AGENTS
NON-METALLIC ELEMENTS
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Beschreibung
Zusammenfassung:Disclosed is a process for granulating potassium salts, which comprises: a) preparing a bentonite gel by mixing (A) bentonite (1) with water (2) in a water:bentonite ratio of from 5:1 to 15:1, and adding a potassium salt (4) to said gel at 60 to 80 DEG C; b) feeding the slurry obtained in step (a) into a rotary drum granulator, in which the slurry (8) is sprayed onto a bed of preformed and recycled hot granules (D), adjusting the moisture content of the granules leaving the granulator (12) in the range of from 4 to 8% and the recycling ratio at from 12:1 to 18:1; c) drying by means of flue gases (E) (at 250-270 DEG C) the granules of step (b) until the moisture content thereof is from 2.0 to 3.5% by weight, the granule temperature at the outlet of the drying zone (15) ranging from 60 to 85 DEG C.