Smelting installation with an electric-arc furnace
AssigneeArcmet Technologie GmbH
InventorGerhard Fuchs
Life of this patent
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Abstract
This invention concerns a smelting installation with an electric-arc furnace in which the roof of the oven vessel is constructed out of two units (7, 8) which are separated by an aperture (38) and can be moved independently of one another relative to the vessel horizontally. One of these units (8) consists of a shaft (9) which serves as preheater for the charge. The upper part of the vessel and the shaft (9) have a converging wall sector (42a, 58, 59).
Claims25
A smelting unit having an arc furnace and characterized by a furnace vessel having a lower vessel portion and an upper vessel portion and a vessel cover having first and second cover portions
- of which the first cover portion includes at least one electrode opening,
- the second cover portion including a shaft fixed in a holding arrangement, with a closable charging opening and a gas passage opening in the upper region of the shaft for preheating feed material which is to be charged into the furnace vessel, in addition
- the holding arrangement and the vessel are displaceable horizontally relative to each other, and
- a part of the internal contour of the shaft cross-section, in a vertical projection, is outside the internal contour of the upper edge of the lower vessel portion and the upper vessel portion in the region beneath the shaft and/or the rear shaft wall as viewed from the electrode openings has a wall sector converging towards the vessel center.
An arc furnace comprising
- a furnace vessel having a lower vessel portion forming a hearth and an upper vessel portion above the hearth, and
- a vessel cover having first and second cover portions, the first cover portion including at least one electrode opening, the second cover portion includes a shaft having a closable charging opening and a gas passage opening in the upper region of the shaft for preheating feed material which is to be charged into the furnace vessel,
- wherein the upper vessel portion in the region beneath the shaft and/or the rear shaft wall as viewed from the electrode openings has a wall sector converging towards the vessel center.
Dependencies are inferred from the claim text.