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Pyrophyllite

 

Grades NW-
CG-1
NW-
CG-2
NW-
CG-3
SGP
(Garhi-1)
GH2:DDT
(Garhi-2)
GH1:DDT
(Garhi-1)
KH:CG2 (Khera-3) KH:CG3
(Khera-3)
KH:CG1
(Khera1)
High Alumina Pyrophyllite-Grade-1 High Alumina Pyrophyllite-grade-2
% LOI 5 5 4.2 0.3 0.2 0.3 0.28 0.13 0.26 0.33 0.5
% Al2O3 31-32 31-32 30 48.52 32.92 33.13 34.82 34.15 37.51 45.6 36.23
% SiO2 65 65 67.89 47.51 63.19 63.21 56.83 63.22 46.7 51.82 55.63
% Fe2O3 0.5 0.5 0.36 2.5 1.61 1.47 0.9 0.81 0.76 0.6 0.8
% TiO2 0.5 0.5 0.5 0.33 0.18 0.14 0.44 0.34 0.23 0.19 0.25
% CaO 0.15 0.15 0.12 0.44 0.21 0.12 0.53 0.18 0.28 0.29 0.3
% MgO TR TR TR TR TR TR TR TR TR TR TR
% Na2O 0.15 0.15 0.18 0.26 0.25 0.25 0.65 0.22 0.32 0.2 0.25
% k2O 0.5 0.5 0.5 0.45 1.3 0.93 5.07 0.63 3.38 0.42 0.5
AP (%) 0.65 7.28 7.17 7.07 3.49 5.6 9.77 3.6
BD (gm/cc) 2.81 2.29 2.07 2.22 2.37 2.22 2.02 2.25
ASG 2.83 2.47 2.22 2.39 2.45 2.35 2.24 2.33
PLC (%) At 1500Deg.C/2hrs .-7.5 .-5.0 .-2.5 Melting .-6.25 .-2.52 .-9.82
Firing Behaviour OK Swelling tendency Swelling tendency OK Swelling tendency OK
Application Softer grade useful for Handicrafts, Fillers in rubber and for making Aluminium silicates A grade lower than NW-CG-1 Grade ceramics, chemicals, potteries, Synthetic Diamond Manufacturing, Paper,Rubber, handicrafts, Insulators Refractories ceramics, chemicals, potteries, Synthetic Diamond Manufacturing, Paper, Rubber, handicrafts, Insulators Refractories and ceramics

Chemical composition and XRD of Pyrophyllite Quartz Grade

Pyrophyllite Quartz Grade KH-PQ NW-PQ
LOI 2.68 2.88
SiO2 80.74 80.93
TiO2 0.41 0.33
Al2O3 14.91 15.34
Fe2O3 0.22 0.21
MnO 0.05 0.04
Cr2O3 TR TR
CaO TR TR
MgO 0.12 0.11
Na2O 0.04 0.04
K2O 0.99 0.65
P2O5 0.04 0.03
ZrO2 0.04 0.05
Total 100.24 100.61
XRD
Quartz
Pyrophyllite
Muscovite
Quartz
Pyrophyllite
Muscovite
Thermal Expansion Residual expansion: +1.091