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Specification of Sodium base-bentonite
(H.S CODE: 250810)
CHEMICAL COMPOSITION:
SiO2: 70＼2%
Al2O3: 15.9 ＼1.5 %
Fe2O3: 2.3＼0.1%
FeO: 0.95＼0.1%
CaO: 0.96＼0.1%
MgO:1.91＼0.1%
NaO: 1.80＼0.1%
P2O3: 0.04＼0.01%
TiO2: 0.04＼0.01%
K2O: 0.78＼0.1%
CAUSTIC SODA: 0.55＼0.1%
PHYSICAL PROPERTY
MONTMORILLONITE CONTENT : 70-72%
MOISTURE:10% MAX
COLLOIDICAL VALENCE: 100%
SWELLING INDEX : me/g MORE THAN OR EQUAL TO 20
WATER ABSORPTION RATE : 550-600%
SPECIFIC VISCOSITY : MUD SPEED/WATER SPEED 1.15＼0.02
PH VALUE: 9-10
WET STRENTH : MORE THAN 0.505kg/cm2
DRY STRENTH : MORE THAN 3.3kgs/cm2
specification of
Calcium base-bentonite
(H.S CODE: 250810)
 CHEMICAL
COMPOSITION:SiO2: 68-72%
Al2O3: 13.5-16.5%
Fe2O3: lower than 1.9%
MgO:2.3-2.5%
CaO:2.4-2.6%
TiO2: lower than 0.10%
K2O: 0.9-1.1%Na2O: 0.3-0.5%
PHYSICAL PROPERTY
L.O.I : lower than 6.5%
Size: 70-320mesh
Moisture: 15% max
Montmorillonite: 60-90%
Green Compressive Strength(hpa) : 45-60
Hot wet tensile Strength(hpa) : 8-12
Colloidal Value( %): 60-90
Swelling index (ml/g) : 8-12
Absorbing water: 180-260%
Sand content: 1%max
Slurry Forming rate(m3/t): 10-14
PH Value: 6.7-7.2
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