Method for producing reduced iron agglomerates
AssigneeKobe Steel, Ltd.
InventorsKoichi Matsushita, Masataka Tateishi, Hidetoshi Tanaka, Takao Harada
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Abstract
A moving hearth is formed by providing a layer of hearth material primarily composed of iron oxide on a base refractory in a reducing furnace and then sintering the hearth material so that the sintered moving hearth is not melted at an operational temperature in a reducing step. The moving hearth is more easily constructed compared to providing a shaped or amorphous refractory on the base refractory, has high durability, and can maintain surface flatness during operation.
Claims7
A method for producing reduced iron agglomerates comprising the steps of:
- supplying iron oxide agglomerates incorporated with carbonaceous material onto a moving hearth moving in a moving hearth furnace, wherein the moving hearth is formed by sintering a hearth material primarily composed of iron oxide and constructed as a layer on a base refractory on the moving hearth, and is present in a semi-melted state at an operational temperature in a reducing step;
- reducing by heating the iron oxide agglomerates to form a reduced iron agglomerates while the moving hearth moves in the moving hearth furnace;
- and
- discharging for collection the reduced iron agglomerates from the moving hearth furnace.
A method for producing reduced iron agglomerates comprising the steps of:
- supplying iron oxide agglomerates incorporated with carbonaceous material onto a moving hearth moving in a moving hearth furnace;
- reducing by heating the iron oxide agglomerates to form reduced iron agglomerates while the moving hearth moves in the moving hearth furnace;
- and discharging for collecting the reduced iron agglomerates from the moving hearth furnace,
- wherein the moving hearth is formed by sintering a hearth material primarily composed of iron oxide and constructed as a layer on a base refractory on the moving hearth, and is present in a semi-melted state at an operational temperature in the reducing step.
Dependencies are inferred from the claim text.