Fireclay bricks

The main applications of fireclay brick are the low temperature parts such as blast furnaces and hot blast furnaces

Item	General clay firebricks	Firebricks for blast furnace	Firebricks for hot-blast stove	Firebricks for pouring	Firebricks for the lining of temming ladle	Firebricks for steel pouring	Low pore firebricks
Brand	N-2a	GN-42	RN-42	JZN-40	CN-40	SN-40XN-40 KN-40 ZN-40	DN-40
Al2O3,  %    min	42	42	42	40	40	40	42
Fe2O3, % max	--	1.7	--	--	--	--	--
Refractoriness() min	1730	1750	1750	1710	1730	1710	1730
Refractoriness under load of 0.2Mpa() min	1350	1430	1400	--	1400	1370(SN-40, KN-40)	1390
Apparent porosity, % max	24	16	24	17-25	19	15-23 (SN-40)22 (KN-40)15-25(XN-40)23(ZN-40)	15
Linear change on reburning, %	+0.1  -0.51400X 2h	0  -0.31450 X 2h	0  -0.41450X 2h	+0.1-0.3 1350 X 2h	0  -0.31400 X 2h	0  -0.31350 X 2h  (XN-40)	+0.1  -0.31400 X 2h
Cold crushing strength   MPa      min	25	49.0	29.4	--	34.3	19.6(ZN-40)	39

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.

Fireclay bricks