$Andalusite mullite refractory brick$
$Andalusite mullite refractory brick$
$Andalusite mullite refractory brick$

Andalusite mullite refractory brick

Introduction

The andalusite mullite refractory brick is made of andalusite , and is added with a powder of sillimanite powder, mullite powder, etc., The binder is added in proportion, and is prepared by mixing, kneading, molding, and drying at a high temperature. Usage of andalusite mullite refractory bricks in hot blast stoves: hot blast stove wall, checker brick, furnace top, combustion chamber ( andalusite low creep series)

1. High temperature resistance, abrasion resistance and corrosion resistance.
2. Good thermal shock resistance.
3. Low creep rate.
4. High refractoriness under load .
5. Reduce harmful impurities
6,Good hot peeling resistance.

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Technical Index

Item	Unit	High Alumina Brick (Andalusite)	Anchor Brick (Andalusite)
Max working temperature	℃	1650	1650
Raw material	/	Andalusite	Andalusite
Al2O3	%	≥59	63
SiO2	%	≤36	34
Fe2O3	%	≤1.0	0.8
Bulk density	g/cm3	2.55	2.5
Cold crushing strength (110℃)	N/mm2	≥70	≥70
Thermal conductivity at 800℃	w/m.k	1.6	1.6
Thermal conductivity at 1200℃	w/m.k	1.61	1.98
Refractoriness (SC)	/	38	38
Thermal shock resistance	Cycles	≥20	≥20
Thermal expansion	%	0.8	0.8
Apparent porosity	%	≤18	≤18

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