NRDC Technology offer - Silica Agglomerates

PLANT PARAMETERS
Capacity		100 kgs/day
No. of Shifts per day		3
Working days per Year.		300
Land Area, m²		500
Covered Area, m²		275
MANPOWER
Managerial		1
Skilled		7
Unskilled		4
RAW MATERIAL/DAY
Abrasive Silica			105 kg.
Binders (a) Sodium silicate solution (b) Citric acid			2 kg. 0.5 kg
UTILITIES/DAY
Power	300 KWH
Water Distilled	150 Lit.
PLANT & MACHINERY
Planatory Mixer				1
Roller compactor				1
Granulator				1
Tray dried				1
Sieve Shaker				2

USE USES

The Product is used in toothpaste manufacturing.

SPECIFICATIONS

S.No.	Properties	Unit	Specified Limit
1.	Appearance	-	White free flowing granules
2.	Moisture Content (105^oC, 2 hrs)	%	8.0 max
3.	Sieve Residue (on 30 mesh sieve)	%	1.0 max
4.	Bulk Density (tapped 50)	gm/lit	400-600
5.	pH Value(5% aq. Slurry)	--	5.5-7.5
6.	Si₂O Content (Anhydrous basis)	%	98 min
7.	Soluble Salts (Sulfates+Chlorides)	%	2.0 max
8.	Iron Content, (As FE⁺³ )	Ppm	420 max
9.	Particle size analysis (Malvern) After 2 mins ultrasonication D50	Micron	10-60
10.	Arsenic	Ppm	4 max
11.	Microbial (1) TVC (2) Y&M	Cfu/gm Cfu/gm	<300 <100
12.	Heavy Metals, (Expressed as Pb)	ppm	5 max

PROCESS

Abrasive Silica, Binder and optimized quantity of distilled water are mixed in a planetary mixer.

Mixed wet material is then compacted in a roller compactor.

Wet flakes are then dried in tray drier at 110^o C.

Dried flakes are subjected to granulation in a granulator.

Granulated material is then sieved through sieve shaker in which oversize fraction will come out as product and undersize material is recycled back to planetary mixer for subsequent batch.

Finished product is packed in 20 kgs. Paper bag.

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