Product Details

Clay and High Alumina Refractory Mortars for Bricks

Applications

As a kind of essential refractory for energy saving and temperature preservation, the alumina insulating brick is used for various industrial kilns & furnaces as glass furnace and iron&steel industry.

Physical properties and chemical composition

Index	LG-1.2	LG-1.0		LG-0.9	LG-0.8	LG-0.7	LG-0.6	LG-0.5
Al2O3,%	≥40
Fe2O3,%	≤2.0
Bulk Density (g/cm3)	≤1.2		≤1.0	≤0.9	≤0.8	≤0.7	≤0.6	≤0.5
Cold Crushing Strength Mpa	≥5		≥3.92	≥3.43	≥2.94	≥2.45	≥1.96	≥1.47
Thermal Conductivity (350 C ) W/m.K	≤0.55		≤0.5	≤0.45	≤0.35	≤0.35	≤0.30	≤0.25
Temp reheating shrinkage less than 2.0 % °C	1300		1300	1300	1300	1000	1000	950

Specification		TYPE
Specification		HD-NN38	HD-NN-42	HD-NN45	HD-LN55	HD-LN65	HD-LN75
Al₂O₃(%)		≥38	≥42	≥45	≥55	≥65	≥75
Refractoriness(°C)		≥1630	≥1690	≥1710	≥1770	≥1770	≥1790
Flexural bond strength (MPa)	110°C×24h	1	1	1	1	1	1
Flexural bond strength (MPa)	——	1200°C×3h ≥3	1200°C×3h ≥3	1200°C×3h ≥3	1400°C×3h ≥5	1400°C×3h ≥5	1400°C×3h ≥5
Bonding time (min)		1~2
Application		For clay bricks and high alumina bricks masonry, used in various industrial kilns, blast furnace and hot stove