The iron filings filler for blast furnace is made of fine selected iron filings and chemical binders, with good thermal conductivity and high strength. And it has the characteristics of good filling performance.
The function of iron filings filling material for blast furnace is to fill the gap between cooling staves, so that the staves can be connected as a whole and play a sealing role. Ensure that the cooling wall gap area does not overheat.
The iron scraps filler is used to fill the gap between the furnace wall and the cooling wall, between the cooling wall and the tap hole frame, and between the large set of blast slag hole.

Project Indicators		GNTT
bulk density，g/cm3		≥3.5
Compressive strengthMPa	800 ℃ × 3h	≥7
	110 ℃ × 24h
Linear rate of change,%		0～+0.5
thermal conductivity,W/m.k		≥12
Curing time,h		6～12