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PROCESS
FOR THE MANUF MANUFACTURING ACTURING OF CALCIUM
CHLORIDE Grades 1) anhydrous
CaCl 2
2) dehydrate
CaCl2.2H2O
3) hexahydrate.
CaCl2.6H2O
1) Raw mate materi rial als s
a) Limestone (calcium (calcium carbonate)
(solid lumps) CaCO3
source from mining of limestone
b) Hydrochloric acid (30%) solution in water (liquid state)
HCl
Byproduct of chlorination plants By product of chloroalkali plants
3) Proce Process ss descr descript iption ion::a) Hydrochl Hydrochloric oric acid is is charged charged into into a acid acid proof proof brick brick lined lined tank
b) Lime stone/ calcium hydroxide is then charged slowly into the tank over a period of 5 to 6 hrs c) the whole tank content content is kept kept for reaction reaction for for 15 to 20 hrs till all the acid is consumed consumed d) the Ph of the reaction reaction mass is is adjusted to 7.5 to 8.0 using calcium hydrox hydroxide ide
e) the reacted mass is then transferred to the settling tanks f)
1
the settled settled reacti reaction on solutio solution n is then sipho siphoned ned into into a other colle collection ction tank tank
g) the unreacted solid from the settling tank is again recycled to the reaction reaction tank h) the clear reacted solution in the collection tank is then filtered through filter press for i)
j)
polishing the solution the filter filtered ed calcium calcium chlor chloride ide solut solution ion is th then en send send to the the evapora evaporation tion vessels where the water is evaporated and the solid calcium chloride recovered it is dryed in the dryer . the calci calcium um chlor chloride ide is is then then pulverize pulverized d to the desir desired ed size size and and pack packed. ed.
4) Polu Poluti tion on abat abatem emen entt Unreacted solids are recycled so there is no solid waste production The reaction produces carbon dioxide which is scrubbed into lime / ammonia solution So gases are taken care of The product is non toxic
VENT air 5) Proce Process ss flow flow chart: chart:-Ca(OH)2 Ca(OH)2/CaCO3
MAERIAL BALANCE FOR THE PROCESS FOR THE MANUFACTURING MANUFACTURING OF CALCIUM CHLORIDE
222tonne/ month anhydrous. 1) Raw Raw materi material al requ requir ired ed Reaction stage a) Calcium carbonate or calcium hydroxide:hydroxide:b) Hydrochl Hydrochloric oric acid 30%
Evaporation stage:a) Input Input for evaporati evaporation:on:b) Output Output from from evaporati evaporation:on:calcium chloride
water. Vapour. 2) Energy Energy require required d for the process process Energy is only consumed in evaporation is terms of fuel. Wood Wood :61347.36kgs / 67221.05kgs Furnace oil:25902.22kgs/28382.22 25902.22k gs/28382.22kgs kgs Ash produced produced bywood will will be be 3067.35 kgs / month used as a fertilizer in plantation. Flue gas will contain no sulphur dioxide and carbon monoxide. 3
