Process for granulating potassium salts
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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creator | COCQUIO, FABRIZIO NARDON, DANILO FORTIBUONI, RAFFAELLO SILVESTRIN, LEONARDO |
description | 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. |
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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.</description><edition>5</edition><language>eng ; fre ; ger</language><subject>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 ; 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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.</description><subject>CHEMISTRY</subject><subject>COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM,RUBIDIUM, CAESIUM, OR FRANCIUM</subject><subject>COMPOUNDS THEREOF</subject><subject>FERTILISERS</subject><subject>FERTILISERS CHARACTERISED BY THEIR FORM</subject><subject>FERTILISERS PRODUCING CARBON DIOXIDE</subject><subject>INORGANIC CHEMISTRY</subject><subject>INORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C</subject><subject>MANUFACTURE THEREOF</subject><subject>METALLURGY</subject><subject>MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENTSUBCLASSES OF CLASS C05</subject><subject>MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVINGA SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES,SOIL-CONDITIONERS, WETTING AGENTS</subject><subject>NON-METALLIC ELEMENTS</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>1995</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZFAPKMpPTi0uVkjLL1JIL0rMK81JLMnMS1coyC9JLC7OLM1VKE7MKSnmYWBNS8wpTuWF0twMCm6uIc4euqkF-fGpxQWJyal5qSXxrgEGJhYWhpaWTobGRCgBAIKSKBQ</recordid><startdate>19950118</startdate><enddate>19950118</enddate><creator>COCQUIO, FABRIZIO</creator><creator>NARDON, DANILO</creator><creator>FORTIBUONI, RAFFAELLO</creator><creator>SILVESTRIN, LEONARDO</creator><scope>EVB</scope></search><sort><creationdate>19950118</creationdate><title>Process for granulating potassium salts</title><author>COCQUIO, FABRIZIO ; 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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.</abstract><edition>5</edition><oa>free_for_read</oa></addata></record> |
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subjects | 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 |
title | Process for granulating potassium salts |
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