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Ball Clay

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Ball Clay

Ball clays (also referred to as plastic clays) are fine-grained, highly plastic sedimentary clays, derived from kaolinite typically moved from decomposed feldspar present in igneous source rocks, such as granite. High quality ball clays are relatively scarce, and valued for their key properties of plasticity, rheology, unfired strength and light fired colour.

As well as kaolinite, ball clays typically contain other ‘contaminants’ that provide its unique characteristics. Layered mineral contaminants provide strength, whereas carbon contaminants can provide favorable rheological properties, well suited for sanitaryware production.

Key characteristics

  • Rheological stability
  • Unfired strength

APPLICATION : Ceramic Products, Refractories, Paint Industries, Paper Industries, Glass Industries etc.

CHEMICAL PROPERTIES

NAME OM-1 BK-1 E-1
SiO2 50 TO 55% 53 TO 55% 55 TO 57%
Al2O3 30 TO 55% 28 TO 33% 28 TO 33%
Fe2O3 1 TO 1.30% 1 TO 1.20% 1 TO 1.40%
TiO2 1 TO 1.40% 1 TO 1.30% 1 TO 1.20%
MgO 0.25 TO 0.35% 0.25 TO 0.35% 0.25 TO 0.35%
CaO 0.45 TO 0.75% 0.45 TO 0.90% 0.45 TO 0.60%
K2O 0.50 TO 1.20% 0.50 TO 1.50% 0.50 TO 1.30%
L.O.I 9.50 TO 11.00% 9.50 TO 10.00% 8.50 TO 10.00%

PHYSICAL PROPERTIES

NAME OM-1 BK-1 E-1
Visual Appearance White Lumps Light Grey Lumps White Lumps
Particle Size (D50)  μ 4 To 5 6 To 5 5
Water Of Plasticity (%) 33 To 36 31 To 33 34 To 37
Green M.O.R. (Kg/Cm²) 8 To 12 7 To 12 8 To 12
Dry M.O.R. (Kg/Cm²) 25 To 35 30 To 40 25 To 35
Fired M.O.R. (Kg/Cm²) 225 To 310 250 To 330 300 To 425
Fired Shrinkage(%) 10 To 11 6 To 8 5 To 7
Fired Colour(100%) L 80 To 83,
A 1.1 To 1.5,
B 10 To 13		 L 83 To 85,
A 1.1 To 1.5,
B 9 To 11		 L 82 To 85,
A 1.1 To 1.5,
B 10 To 13

CHEMICAL PROPERTIES

NAME SN-1 UKRN-2 J-1
SIO2 48.95 52.38 52.79
AL2O3 32.81 31.32 32.0
FE2O3 1.47 1.02 1.01
TIO2 1.78 0.71 1.00
MGO 0.42 0.31 0.48
CAO 0.81 0.89 1.06
K2O 1.03 1.16 1.18
L.O.I 12.31 11.65 10.12
 

PHYSICAL  PROPERTIES

NAME SN-1 UKRN-2 J-1
Visual Appearance Cream Lumps Chips White Lumps
Particle Size (D50) μ 3 TO 4 3 TO 4 3 TO 4
Water Of Plasticity (%) 41.00 45.20 35
Green M.O.R. (Kg/Cm²) 8.16 10.15 12.15
Dry M.O.R. (Kg/Cm²) 30.41 42.25 35.45
Fired M.O.R. (Kg/Cm²) 246.34 375.01 198.74
Fired Shrinkage(%) 15.21 10.51 8.5
Fired Colour(100%) L 66.18,
A  2.51,
B 21.63		 L 80.93,
A 0.18,
B 9.89		 L 80.92,
A 1.1 ,
B 12.15
 

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