Relationship between Chemical Composition and Refractoriness Predicted (TSK).
T
SK is the nominal temperature equivalent to its refractoriness.

Relationship between the SiO
2 content and T
SK

Relationship between the Na
2O content and T
SK

Relationship between the Na
2O+K
2O content and T
SK

Relationship between the Na
2O+K
2O+CaO content and T
SK

C, N and K are CaO, Na
2O and K
2O content of samples (wt%).
Relationship between the refractoriness calculated by correlative equation using CaO, Na2O, K2O content and TSK

S, A, F, C, N and K are SiO
2, Al
2O
3, Fe
2O
3, CaO, Na
2O and K
2O content of samples (wt%).
Relationship between the refractoriness calculated by correlative equation and TSK