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Description: Andalusite/Pyrophyllite Ore

Oxide Analysis Formula
K2O 0.20% 0.01
Na2O 0.20% 0.02
TiO2 0.40% 0.03
Al2O3 18.90% 1.00
SiO2 77.00% 6.91
Fe2O3 0.40% 0.01
LOI 2.80%n/a
Oxide Weight 524.03
Formula Weight 539.13


The Pyrotrol group of mineral products offers a controlled blend of milled Andalusite/Pyrophyllite ores designed to control strinkage in whiteware ceramic applications. Pyrotrol reduces thermal expansion, stabilizes shrinkage, widens firing range and reduces warpage.

Alumina content is controlled to meet certain specifications. Pyrotrol produces an excellent kiln car wash and is an inexpensive coating material for facebrick production.

This material is dry milled and magnetically separated.

The analysis shown is an average.

Related Information


Materials Alkatrol
Materials Andafrac
Materials Pyrofrac
Materials Pyrophyl
Materials Seriphyl
Materials Pyrotrol 2253
Materials Pyrotrol 3503
Materials Pyrotrol 2004
Materials Pyrotrol 2005
Typecodes Aluminum Silicate
Materials not classifiable as commonly known aluminum silicates. For example, kaolin is a common aluminum silicate.


Bulk Density lbs/cu. ft. (Packed) 40-45
Pyrometric Cone Equivalent 26
Sieve Analysis Dry +200 mesh: 1-3.5% +325: 1-12.5%
Density (Specific Gravity) 2.80


Body Thermal ExpansionPyrotrol products impart higher strength in electrical porcelains and reduce dunting problems associated with traditional porcelain bodies if substituted for silica content.
By Tony Hansen
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