Specifications

1.blast furnaces and hot blast furnaces
2.waste incinerators and glass melting furnaces

 Applications

 

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.

 

Description

 

Fire clay refractory brick with super-low thermal conductivity add foaming agent and stabilizing agent into the slurry confected by some refractory raw materials, such as alumina powder, refractory clay and cyanite. After mixing them, the refractory slurry evenly adsorbs around the foams, and spherical proes are formed after being dried and fired. The six faces are all cut by machine so that the sizes are accurate.

 

Physical and chemical index

Item		N-1	N-2a	N-2b	N-3a
Refractoriness	SK	31	30	30	29
	°C	1750	1730	1730	1710
Chemical composition	Al2O3  ≥	40	39	34	34
	Fe2O3  ≤	2.1	2.1	2.3	2.3
Apparent Porosity%  ≤		22	24	26	24
Bulk Density g/cm3    ≥		2.15	2.10	2.10	2.05
Cold Crushing Strength Mpa  ≥		30	25	20	20
0.2Mpa Refractoriness Under Load T0.6 °C ≥		1400	1350	1350	1320
Reheating Linear Change(%)	1400°C 2hour	+0.1- -0.4	+0.1- -0.5	+0.2- -0.5
	1350°C 2hour				+0.2- -0.5