1, Low thermal conductivity 2,Low heat storage 3,High spalling resistance 4,High hot compressive strength

1.Introduction of refractory materials

 Refractory materialsconsist of fire clay and binder. The chemical components of these bricks are SiO2 and Al2O3

Clay bricks use Chamotte that the fire clay is calcinated as the main material. These bricks consist of fire clay and binder. The chemical components of these bricks are SiO2 and Al2O3

 2.Application of refractory materials

 The main applications are the low temperature parts such as blast furnaces and hot blast furnaces, waste incinerators and glass melting furnaces. Due to the scale-up of a variety of industrial furnaces and severity of operating conditions, super dense clay bricks that made of more refined chamotte being calcinated at high temperature are applied more than before.

3.Specification of refractory materials

item	SK-32	SK-34	SK-36	SK-37	SK-38
AI2O3(%)	38	42	50	65	70
Fe2O3 (%)	3	2.5	2	2	0.3
Refractoriness (SK)	32	34	36	37	38
Refractoriness under load, 0.2MPa, Ta, ((C)	1300	1350	1450	1550	1580
Porosity (%)	22-26	19-23	20-24	23	18
Bulk density (g/cm)	2.05	2.1-2.15	2.3-2.4	2.5	2.62
Cold crushing strength (MPa)	25	25	45	45	51
Thermal expansion at 100C (%)	0.6	0.6	0.3	0.5-0.7	0.6

Refractory materials for cement kiln