JP2011145056A5 - Steel container - Google Patents

Claims (8)

The molten iron is tapped from the blast furnace and holds the受銑, a ladle-type steel for container for practicing the smelting process in the transport to or retained molten iron holding the molten iron, from the outside of the steel container , Iron shell, permanent refractory layer, work refractory layer in this order, and the work refractory layer is made of molded brick or unshaped refractor having a thermal conductivity of 12 W / (m · K) or less And fireproof with an average heat flux of 18 kW / m ² or less, which is emitted from the upper end opening of the empty iron making container after the molten iron received in the blast furnace is discharged for one hour after the discharge. steel for container characterized by having things lining structure. The work refractory layer is made of the work refractory layer with the compressive strength σ _C (MPa) of the refractory, the thermal expansion coefficient α (1 / K), the static elastic modulus E (MPa) and the Poisson's ratio ((−) and the temperature difference ΔT between the operating temperature and the room temperature (K), but characterized by comprising a refractory material, thereby satisfying the expression (1) of the relationship of the following, for steelmaking container according to claim 1.

Characterized by a a 200MPa or more the static modulus of elasticity E, steel for container of claim 2. The said work refractory layer is comprised by the shaping | molding brick or a monolithic refractor containing aluminum oxide and silicon carbide, The steel container for steelmaking in any one of Claim 1 thru | or 3 characterized by the above-mentioned. vessel. The workpiece refractory layer, characterized in that its carbon content is less than 10 mass%, steel for container according to any one of claims 1 to 4. Between the permanent refractory layer and the steel shell, characterized in that the heat insulating material is arranged, for steelmaking container according to any one of claims 1 to 5. The thickness of the said heat insulating material is 5 mm or less, The container for ironmaking of Claim 6 characterized by the above-mentioned . The heat insulating material is characterized in that its thermal conductivity is 0.1W / (m · K) or less, for steelmaking container according to claim 6 or claim 7.