High Temperature Alumina Ceramic Tubes For Roller Kiln

High Temperature Alumina Ceramic Rollers For Roller Kiln With the state-of –the-art technology and processing, super high temperature ceramic rollers have very advanced features of excellent thermal shock resistance, high bending strength and load capacity. Such this kind of ceramic rollers are used in super wide-body kiln to produce large type polished tiles, glazed tiles such as wall tiles and floor tiles. The maximum working temperature is up to 1350℃, and the maximum length is 5200MM.   Items Unit Type1--- NT909 Type2-- NT969 Type3-- NT979 Type4-- NT989 Type5-- NT999 Al2O3 % ≈18    70--72 73--75 76--78  ≥80 ZrO2 % ----  ---- --- 4--6  4--6 SiC % ≈45  --- --- ---  --- Water absorption %  8--10  7--9 6--8 4--6  3--5 Max. Working Temperature ℃ 1050  1120 1250 1350  1400 Anti-bending Strength MPa 45--55  45--55 50--60 60--70  70--80 Thermal Shock Resistance  / Excellent  Excellent  Excellent  Excellent  Excellent Refractoriness  ℃ 1300---1400  1650--1700 1700--1750 1750--1800  ≥1860 T.I.R mm ≤0.05%    ≤0.05% ≤0.05% ≤0.05%  ≤0.05% Dia. Tolerance mm +0.3,-0.2  +0.3,-0.2 +0.3,-0.2 +0.3,-0.2  +0.3,-0.2 Length Tolerance mm  ±2  ±2 ±2  ±2  ±2 Roundness mm ≤0.3  ≤0.3 ≤0.3 ≤0.3  ≤0.3    Inner Wall Tile& Glazed Floor Tile  Inner Wall Tile& Glazed Floor Tile  Inner Wall Tile, Glazed Floor Tile & Vitrified Outer wall tile  Inner Wall Tile, Glazed Floor Tile , Vitrified Outer wall tile, Square Tile, Polishing Tile &Household Tile  Inner Wall Tile, Glazed Floor Tile , Vitrified Outer wall tile, Square Tile, Polishing Tile ,Household Tile& Sanitary Ware.