The protective layer of blast furnace and hot blast furnace shell is suitable for the cooperation between the body of iron making system and hot blast pipeline. The rising pipe, the falling pipe, the raw gas pipe, the furnace head and other parts are cold sprayed to protect the furnace shell, which is acid resistant, wear-resistant, corrosion-resistant and has good heat insulation effect. It is widely used as the protective material of furnace shell by metallurgical industrial furnaces.

entry name		Company	FN-130	FH-140
Al2O3		％	≥40	≥45
bulk density		g/cm3	≥1.65	≥1.95
Linear rate of change		％	±1.0（1300℃×3h）	±1.0（1400℃×3h）
Devitrification strength	110℃×16h	MPa	≥4.0	≥4.4
	Hot state		≥0.5（1300℃）	≥0.5（1400℃）
Thermal conductivity		W/(m·k)	＜0.75	--
Refractoriness		℃	≥1510	≥1610
Operating temperature range		℃	1200～1300	1200～1400