alumina brick, buy Light Corundum Mullite Reractory Bricks FOR Tunnel kiln on China Suppliers Mobile

Product Details

Specifications

Light corundum mullite bricks
prepared by sintering of high temperature after molding taking white corundum,fused mullite

Light corundum mullite bricks are prepared by sintering of high temperature after molding taking white corundum,fused mullite and abletive agent mixedin definite proportion as raw material. The products have the advantages of high temperature resistance,low thermal conductivity(good insulating efficiency,thin kiln wall and low cost),high strength,and high thermal shock stability. They are widely usedin various inner linings and heat insulation layers of high temperature kilns.

Physical and Chemical Indexes of Light Corundum Mullite Bricks

Indexes / Brand	GMQ1650	GMQ1800
AL₂O₃ % ≥	85	99
Bulk density g/cm³	1.5	1.5
Compressive strength at normal temperature MPa ≥	12	15
Reheating linear shrinkages 1600°C×3h % ≤	0.2	0.2
Thermal conductivity( hot side 1000°C)W/m.k ≤	1.2	1.2
Thermal shock stability (1000°C cooled in atmosphere ) per time ≥	50	50
Max. usage temperature( 1000 °C)	1650	1800
Applications	Used for inner linings of high temperature kiln

Physical and Chemical Indexes of Light Mullite Bricks

Brand		MQ-1350	MQ-1450	MQ-1500	JM-26	JM-28	JM-30	JM-32
Chemical composition	Al₂O₃ % ≥	55	60	65	58	67	73	77
	SiO₂ % ≤	43	38	33
	Fe₂O₃% ≤	1	0.7	0.7	0.7	0.6	0.5	0.4
Temperature for long-time service ( Classified temperature )°C		1350	1400	1500	1430	1540	1650	1760
Bulk density g/cm³		0.8-1.0	0.8-1.0	0.8-1.0	0.8	0.9	1.0	1.25
Compressive strength at normal temperature MPa ≥		3	4	5	1.6	2.1	2.5	3.5
Reheating Linear shinkage % ≤		1350°C×4h 0.5	1400°C×4h 0.5	1500°C×4h 0.5	1400°C×24h 0.4	1510°C×24h 0.5	1620°C×24h 0.9	1730°C×24h 0.9
Thermal conductivity W/m.k ≤		350°C 0.4	350°C 0.4	350°C 0.4	1200°C 0.35	1200°C 0.41	1200°C 0.47	1200°C 0.56
Soften point at 0.1MPa °C ≥		1300	1350	1450