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US 8,298,317 B2Granted
Ironmaking and steelmaking
AssigneeTechnological Resources Pty. Limited
InventorsRodney James Dry, Robin John Batterham
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AssigneeTechnological Resources Pty. Limited
InventorsRodney James Dry, Robin John Batterham
Estimating the term…
A steelmaking process is disclosed. The process includes producing molten steel and molten steelmaking slag in a steelmaking process, the steelmaking slag including iron units and flux units, and thereafter producing molten iron in a molten bath based direct smelting process using a substantial portion of the steelmaking slag as part of the feed material requirements for the direct smelting process. A direct smelting process is also disclosed. The process includes pre-treating ferrous material including steelmaking slag and thereafter direct smelting molten iron using the pretreated ferrous material as part of the feed material for the process.
A process that includes the steps of:
A direct smelting process for producing molten iron in a direct smelting vessel containing a molten bath of iron and iron-making slag, the process including the steps of:
Dependencies are inferred from the claim text.
From the US filing history. Foreign family members aren’t listed.
Making spongy iron or liquid steel, by direct processes: use of special additives or fluxing agents
General features in the manufacture of pig-iron: recovery of by-products, e.g. slag
Obtaining iron or steel in a molten state: introduction of iron oxide into a bath of molten iron containing a carbon reductant
Manufacture of steel in the converter: processes yielding slags of special composition
About 5 months of term left · ends 26 Mar 2027 (estimated)
The present invention relates to steelmaking, particularly steelmaking in an integrated steelmaking plant.
The present invention also relates to ironmaking, particularly via a molten bath based direct smelting process.
The present invention is concerned with improving the economics of operating steelmaking plants, particularly integrated steelmaking plants, by making effective use of steelmaking slag and dusts and other steelmaking plant by-products that are generally regarded as low value wastes.
Embodiments of the present invention are now described, by way of example only, with reference to the accompanying drawings, of which:
FIG. 1 illustrates schematically one embodiment of a process flowsheet;
FIG. 2 illustrates schematically another embodiment of a process flowsheet; and,
With reference to FIG. 1, there is provided:
(a) an ironmaking apparatus including a pre-treatment unit in the form of a preheater, typically a shaft furnace or a fluidised bed, and
(b) a direct smelting vessel that is suitable particularly for operation by the HIsmelt process as described in International patent application PCT/AU96/00197, the contents of which are incorporated herein by reference.