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TYPES OF REFRACTORIES - Coggle Diagram
TYPES OF REFRACTORIES
Silica Brick
at least 93% SiO2
does not begin to soften under high loads until its fusion point is approached.
Fireclay refractories
consists of SiO2<78% and Al2O3< 44%
fire-clay brick begin to soften far below their fusion temperature
High Alumina Refractories
greater than 45% alumina
most chemically stable oxides, offers excellent hardness, strength and spalling resistance.
Chromite Refractories
Chrome-magnesite refractories
withstand corrosive slags and gases and have high refractoriness
Magnesite-chromite refractories
better spalling resistance than chrome-magnesite
Monolithics
Single piece casts in equipment shape
Replacing conventional refractories
Dolomite
greater than 97% CaO+ MgO
most compatible material with the cement kiln clinker
Zirconia Refractories
polymorphic material
used as a high temperature insulating refractory
Magnesite
at least 85% magnesium oxide
very high slag resistance ( lime and iron rich slags)