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Oxide Analysis Formula
K2O 0.20% 0.01
Na2O 0.20% 0.02
TiO2 0.40% 0.03
Al2O3 16.50% 1.00
SiO2 76.90% 7.91
Fe2O3 1.00% 0.04
Oxide Weight 588.51
Formula Weight 618.18


The Pyrofrac group of mineral products is composed of co-products from the Andafrac series. These are smaller grain derivatives of coarser beneficiated Andalusite/Pyrophyllite ores. The broad range of alumina contents in this series enables tuning to a specific application. Some of these products have proven effective as components in refractory mixes, industrial ceramic products, coatings for the structural clay industry.

This analysis is for the 0204 grade which is representative of the many grades available.
The various grades differ in particle size from a coarse grog to fine powder. Alumina content varies from 13.5 to 21.0, alkalies from 0.4 to 0.9, LOI from 3.0 to 5.7.

Related Information


Materials Alkatrol
Materials Pyrofrac 2034
Materials Pyrofrac 4203
Materials Pyrofrac 4205
Materials Pyrofrac 2023
Materials Pyrofrac 2024
Materials Pyrofrac 1855
Materials Pyrofrac 1004
Materials Andafrac
Materials Pyrotrol
Materials Pyrophyl
Materials Seriphyl
Materials Andalusite
Materials Pyrophyllite
Materials Pyrofrac 0204
Materials Pyrofrac 0304
Materials Pyrofrac 1655
Typecodes Aluminum Silicate
Materials not classifiable as commonly known aluminum silicates. For example, kaolin is a common aluminum silicate.


Pyrometric Cone Equivalent23-29
Density (Specific Gravity)2.6-2.7

By Tony Hansen

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