Chamotte Brick

1.Made by chamotte clinker and binder,through Crushing,Mixing,Shaping,Drying,high temperature Sintering.
2.Al2O3 is 30%-45%,SiO2 is 50%-65%,and a small number of alkali metals,alkaline earthmetal oxides TiO2,Fe2O3.
3.Mineral composition is mullite, quartz and glass phase.
4.Refractoriness is 1580-1750℃, refractoriness under load is 1250-1450℃,
5.Low line expansion coefficients,good thermal shock resistance,strong ability to resist erosion acid slag.
6.Working temperature:less than 1350℃.

Item	SK30	SK32	SK34	SK35
Al2O3 /%	≥30	≥35	≥38	≥45
Fe2O3/%	≤2.5	≤2.5	≤2.0	≤2.0
Refractoriness /°C	≥1670	≥1690	≥1730	≥1750
Bulk density/g/cm3	1.9-2.0	1.95-2.1	2.1-2.2	2.15-2.22
Apparent porosity/ %	≤26	≤24	≤22	≤20
Cold crushing strength/ MPa	≥20	≥25	≥30	≥40
Refractoriness under load/ °C	≥1250	≥1300	≥1360	1420

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Non-ferrous Metal industry	Smelting furnace, reverberatory furnace etc
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