YU HO REFRACTORIES Co., LTD.


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【MULLITE BRICK】

Mullite(3Al2O3、2SiO2) has a good chemical stability at high temperature and its melting point is over 1810℃. YU HO produces two kinds of mullite brick, MUL and SMU. The main raw material of MUL is calcined nature ore and that of SMU is systhetic mullite. Both of them have the fallowing features ： ‧High refractoriness under load. ‧Good resistance to chemical erosion. ‧Volume stable at high temperature. ‧Good spalling resistance.

＼　代號 Brand 特性質Properties	MUL-7S	MUL-7	MUL-6S	MUL-6	SMU-70	SMU-60
耐火度(SK) Refractoriness	＞38	＞38	＞38	＞37	＞38	＞37
氣孔率(%) Apparent Porosity	≦20	≦20	≦20	≦20	≦20	≦20
體密度(g/cm3) Bulk Density	≧2.55	≧2.50	≧2.45	≧2.40	≧2.35	≧2.30
耐壓強度(kg/cm2) Compressive Strength	≧600	≧600	≧600	≧600	≧600	≧600
荷重耐火度(T2)℃ Refractoriness Under Load	＞1630	＞1610	＞1600	＞1570	＞1650	＞1600
Al2O3(%)	≧72	≧68	≧65	≧60	≧68	≧64
高溫膨脹率(%) Expansion at 1000℃	＜0.6	＜0.6	＜0.6	＜0.6	＜0.6	＜0.6
再熱線變化率 after1500℃×2hrs Permanent Linear Change (%)	±0.2	±0.2	±0.2	±0.2	±0.2	±0.2
熱傳導率(kcal/m.hr.℃)500℃ Thermal Conductivity 1000℃	1.6 1.8	1.5 1.8	1.4 1.7	1.3 1.6	1.6 1.8	1.5 1.7
用途 Applications	旋窯各式窯爐 Rotary kiln Various furnaces	旋窯各式窯爐 Rotary kiln Various furnaces	旋窯各式窯爐 Rotary kiln Various furnaces	旋窯各式窯爐 Rotary kiln Various furnaces	玻璃窯 Glass furnace	玻璃窯 Glass furnace