NRDC Technology offer-Abrasive Silica

PLANT PARAMETERS
Capacity	5 MT/day or 1500 TPA
No.of Shifts per day	3
Working days per Year.	300
Land Area, m²	10000 sq. mt.
Covered Area, m²	2500 sq. mt.
MANPOWER
Managerial	1
Skilled	35
Unskilled	20
RAW MATERIAL/DAY
Sodium Silicate(Glass)		6.25 MT
Sulfuric Acid (Oleum)		2.5 MT
Sodium Chloride		0.35 MT
UTILITIES/DAY
Power		400 KWH
Water		25 KL
Steam		2 Tons
Fuel (Kerosene)		200 Lits.
PLANT & MACHINERY
Fluidised Bed coal fired boiler		1
Digestor for sodium silicate glass		2
Silicate storage tanks		6
SS 316 reactor jacked		1
Instrumentation & flow controls		--
Plate & frame type filter press		2
Spray drier having water evaporation		1
Inhouse fabrication of slurry		Set
AC Mill-60 HP(ACM-60)		1
Pumps with mtoors		8
Air compressors		2
Weighing scale		1

USES The Product is used in gel toothpaste formulation to impart cleaning action properties to gel toothpaste.

SPECIFICATIONS

S. No.	Properties	Unit	Specified Limit
1.	Appearance	-	White free flowing powder
2.	Moisture Content (105^oC, 2 hrs)	%	6.0 max
3.	Loss on Ignition (100^oC, 2 hrs) (Anhydrous basis)	%	6.0 max
4.	Bulk Density (tapped 50)	gm/lit	250-450
5.	pH Value(5% aq. Slurry)	--	6 – 8
6.	Oil Absorption Value	%	90-140
7.	Si₂O Content (Anhydrous basis)	%	98.5 min
8.	Soluble Salts (Sulfates+Chlorides)	%	2.00 max
9.	Iron Content, (As FE⁺³ )	Ppm	250 max
10.	Particle Size Analysis (Malvern) D10 D50 D90	Micron Micron Micron	2.0 min 7-11 30.0 max
11.	Reactive Index	--	1.4400-1.4460
12.	Transmission at above RI	%	70 min.
11.	Microbial (1) TVC (2) Y&M	Cfu/gm Cfu/gm	<300 <100
12.	RDA Value (By Method)	--	100 - 150
13.	Viscosity, (10% Slurry)	Cps	400 max
14.	Heavy Metals, (Expressed as Pb)	ppm	15 max

The product specification is equivalent and matches other foreign products.

PROCESS

Sodium silicate glass is digested in a digestor at high temp. and pressure and desired concentration of sodium silicate solution is obtained. Using above sodium silicate solution and dilute-sulfuric acid, reaction is carried out in a reactor in presence of optimised quantity of electrolyte at elevated temp and in the optimised pH range of the reaction medium.

After completion of reaction in stipulated time, product slurry is filtered and washed with water to remove soluble salts generated during the reaction. The washed cake is again reslurried before it is spray dried in spray drying system. Other drying techniques can be used.

The product is then milled to get the desired particle size distribution of the finished product. The finished product is then packed in 25 kgs. HDPE/paper bag as per the requirement of the user industry.

STATUTORY APPROVAL – FDA APPROVED

National Research Development Corporation, a Government of India Enterprise, is a premier technology transfer Corporation with four decades of experience. It has helped establish over one thousand projects in the small and medium scale sector.

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