NRDC Technology offer-FREE FLOWING IODISED SALT

PLANT PARAMETERS
Capacity, TPA	6000
No.of Shifts / day	3
Working days / Yr	300
Land Area, m²	500
Covered Area, m²	60
MANPOWER
Managerial	2
Skilled	5
Unskilled	12
RAW MATERIAL ( per Tonne of Product)
Sun drird Salt, T	1.5
Soda ash , T	0.40
Ca. Carbonate , T	0.25
Ba. Carbonate , T	0.40
Sulphuricacid,Kg	0.50
Nitric acid , Kg.	0.10
Hydrochloric acid , Kg.	0.25
Iodinecrystals,Kg	0.10
UTILITIES (Per Tonne of Product)
Power, KwH	180
Water, KL	4
Fuel (LFO) , KL	0.25
PLANT & MACHINERY
SS Evaporators	Boiler
SS Drying pan	Centrifuge
SS Coating pan	Tanks
Wooden filter press	Sieve shaker

Certain elements like sodium, chlorine, calcium, magnesium, phosphorous, iron, zinc, copper manganese and iodine are required for maintaining metabolic and physiological activities of human body. Iodine plays an important role in emulating proper physical and mental growth of human being. The daily requirement of iodine is 40 micrograms for children upto six months of age and 150 micrograms for a grown up adult. For pregnant and lactating mothers the daily requirement goes upto 175 t0 200 micrograms. Insufficient intake of iodine generally results in Goiter retarded mental and physical growth, deaf mutism cretaniom, increase in still births and infant mortality. Iodine deficiency disorders (IDD) can be prevented by addition of iodine to common salts. Salt has been considered the most effective, economical and self controlling carrier for iodine. The Govt. Of India has taken a policy decision to iodise the total edible salt. Common salt is always associated with many impurities and some of them are hygroscopic in nature and therefore when powdered to the requisite grain size it may not be free flowing which is a much required property. In humid conditions, the common salt, even free from hygroscopic impurities, absorb moisture and forms lumps or cakes. The Impurities in the salt affect the shelf life of iodine. The non-uniform salt crystals may also result in non-uniform distribution of iodine. Therefore it is necessary to incorporate small quantity of chemicals viz., anticaking agents alongwith iodating chemicals to the common salt after purifying in order to get a free flowing iodised salt. The process being offered produces a purer salt with less soluble as well as insoluble impurities, having uniformly sized salt crystals which are coated with iodating and anticaking agents.

Quality :

The salt obtained by this process is a free flow iodised salt which is almost similar to physical as well as chemical properties to salt obtained by forced evaporation techniques. It has 98.2 - 99.2 % purity, 32 ppm iodine and 200 - 500 micron particle size.

PROCESS

The process involves loading of the raw salt to grinders, washing in a wash column, draining of wash liquor, submerging washed salt crystals in solution containing iodating and anticaking chemicals, loading of wet washed salt to mechanical devices, removal of solution from salt in mechanical devices, drying, sieving and packing.

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