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Bentonite

What is Bentonite ?

Foundry Grade

All cast iron, steel & malleable iron foundries are almost using Bentonite with cost efficient results, kutch region is famous for a very good sodium Bentonite for casting industries. For continuous mould making also kutch Bentonite is used successfully. Our foundry grade Bentonite powder gives good flow ability. Compact ability and thermal stability for the production of high quality castings

Following parameters help to make high quality castings

  • High gelling time which gives high strength in less mulling time
  • pH Maintaining
  • Active clay maintaining
  • High strength on good compatibility
Properties Protocol Unit Result
Free Swelling Volume 2 gm/100ml ASTM D 5890:1995 ml 28 – 30
Methylene Blue Absorption Value API spe 131:2004/ ISO 10416:2002 mg/gm of clay 350-400
Liquid Limit IS:12446-1988 ml/100 gm 550 – 650
Gel Time 2.5gm/25 ml IS:12446-1988 second Instant.
Gelling Index IS:12446-1988 ml 75 – 85
Moisture Content % by weight API Spec. 13A:2004/ ISO 13500: 1998 % 10.0 – 12.0
PH Value 2% slurry IS:6186-1986 pH 9.5 – 9.9
Green Compression Strength Bentonite : Water :10:4 55-60 A.F.S Sand IS:1918-1966 psi 12
Wet Tensile Strength IS:12446-1988 N/cm2 0.16-0.18
Dry Mesh % Passing 200 B.S.S IS:6186-1986 % 85 Minimum
Swelling Index IS:6186-1986 10ml/gm 24-28

Drilling Grade

Properties Protocol Unit REQUIRED RESULT
Viscometer Dial Reading at 600 rpm API Spec. 13A:2004/ ISO 13500: 1998 r/min 30 35-40
Yield Point / Plastic Viscosity Ratio API Spec. 13A:2004/ ISO 13500: 1998 3 Max 2.5
Filterate Volume API Spec. 13A:2004/ ISO 13500: 1998 ML 15 Max 14
Moisture Content API Spec. 13A:2004/ ISO 13500: 1998 % by weight 10.0 max. 10
Dry Screen Analysis(Residue Greater than 75 Microns)% API Spec. 13A:2004/ ISO 13500: 1998 % by weight 4.0 max. 3.0 – 4.0

OCMA Grade

PROPERTIES PROTOCOL UNIT REQUIRED
Yield OCMA DFCP-4 bbls/2000lbs 90 min
A.P.I. Filterate Loss OCMA DFCP-4 ml 15.0 max.
Moisture Content API Spec. 13A:2004/ ISO 13500: 1998 % by weight 15.0 max.
Dry Screen Analysis 100 Mesh Sieve OCMA DFCP-4 % by weight 98.0 min.
Wet Screen Analysis 200 Mesh Sieve residue OCMA DFCP-4 % by weight 2.5 max

Piling Grade Bentonite Powder

Physical Analysis

Properties Protocol Unit Result
Liquid Limit IS:12446-1988 ml/100 gm 400 – 450
Moisture Content API Spec. 13A:2004/ ISO 13500: 1998 % by wt. 12.0 Max
Dry Screen Analysis (residue on 75 um sieve IS:6186-1986 % by. Wt. 10.0 max.
Free Swelling Volume 2gm/100ml ASTM D 5890:1995 ml 30 – 35
PH Value of 5% gel IS:6186-1986 pH 9.5  – 10.0
Loose Bulk Density IS:7589-1974 gm/ml 0.85 – 1.0
Gel Time 2.5gm/25 ml IS:12446-1988 second Instant
Filterate Volume API Spec. 13A:2004/ ISO 13500: 1998 ml 20 max
Viscosity at 600 rpm API Spec. 13A:2004/ ISO 13500: 1998   30 min
Methylene Blue Value API spe 131:2004/ ISO 10416:2002 mg/gm of clay 350 – 400
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