• Unshaped Refractory Materials

          Unshaped refractory materials are defined as” mixtures consisting of aggregates, additives, and binders, prepared for direct use in the state of delivery or after adding suited liquids”. In contrast to refractory bricks, they are without specific shape and are in majority placed in larger sections behind molds and templates forming a monolithic lining. Gunning installations without the requirement for a mold are increasing due to ease of application and higher installation speed.

China Tabular alumina manufacturing process

Tabular Alumina, sometimes called TWA, is a pure, sintered corundum that does not add any additives such as MgO, B2O3, and shrinks completely.

It has coarse crystals and a well-developed α-Al2O3 crystal structure.

The content of Al2O3 is more than 99%. Crystal structure, with small pores and many closed pores, and the porosity is roughly equivalent to that of Fused Alumina.

 

Flow chart of Tabular Alumina

Flow chart of Tabular Alumina

 

Physical index
ColorWhite
Bulk density3.50g/cm3
Water absorption1.5%
Apparent porosity5%

 

Chemical index
Al2O399.2%
SiO20.1%
Fe2O30.05%
Na2O0.4%

 

Particle Size Distribution
Size:mmDistributionTypical Values %MAX/MIN %
5-10mm5-10mm9275
7-10mm5840
5-7mm3520
3-6mm3-6mm9890
4-6mm5540
3-4mm4420
1-3mm1-3mm9990
2-3mm5230
1-2mm4730
1-2mm+2.36mm810
-1mm510
0.5-1mm0.5-1.18mm9590
0.7-1.18mm4535
0.5-0.7mm5020
0.2-0.6mm+0.6mm510
-0.2mm410
0-0.5mm0-0.5mm9590
0.15-0.5mm4938
-200#+0.088mm0.33
-0.044mm9690
-325#-0.044mm9785
Available Sizes
Fraction0-30mm,30-10mm,12-6mm,10-8mm,8-5mm,5-3mm,3-1mm,2-1mm,1-0mm,1-0.5mm,0.5-0.2mm,0.5-0mm,0.3-0mm
Fine46mesh-0,60mesh-0,80mesh-0,100mesh-0,120mesh-0,150mesh-0,180mesh-0,200mesh-0,240mesh-0,270mesh-0
Customized size is available upon request
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