DE2504933C2 - Continuous steel production - Google Patents

Description

3 °

The present invention relates to an apparatus for continuously producing steel in use of scrap, sponge iron or the like. And corresponding ferrous metals, with a known per se Melting vessel with a burner which acts on the insert from below by a flame and an outlet arranged at the bottom of the vessel and a tiltable, exchangeable one below it and heatable flow-through vessel with arc heating, which is equipped with a slag separator is provided, according to patent 23 25 593.

Such a method is described in the main patent 23 25 593, wherein the metal used in the Melting vessel is melted, runs together with the slag into a flow-through vessel from which the Metal runs continuously from a fox-like tapping, the metal in the flow-through vessel becomes overheated. In this way of working, the slag level is in contrast to the way of working of a normal electric arc furnace always in a narrow, narrow furnace zone. In addition comes that the slag layer height is set comparatively low by the ongoing slag discharge can be.

The object of the present invention is to reduce the narrowly delimited slag zone in such a device to protect against slag attack.

This object is achieved in that the flow-through vessel has an essentially lenticular interior has, in which the slag zone is located at a large distance from the arc, the Slag zone can be cooled by an indirect water cooling system limited to the slag area and / or in the area of the narrow slag zone the flow-through vessel runs out flat or is set off horizontally is.

The water cooling creates a temperature

gradient, which leads to the formation of a permanent slag shell, so that in this way the heat balance the flow-through vessel is favorably influenced. Due to the shallow discharge of the flow-through vessel in the The area of the slag zone or the horizontal settling can be used when mending the refractory lining Lightly deposit added dolomite on the edge area, possibly in this area From the outside, dolomite can be fed in again and again to prevent corrosion in the slag zone of the refractory material to be balanced by the slag. This sliding down of dolomite by exploiting the embankment that forms in the interior can be carried out by known conveying devices in which the bulk material is pressed inwards in a spiral shape from the outside.

The shape of the flow-through vessel for overheating is expediently due to the narrowly limited To make wear area such that the annular contact zone between slag and refractory lining of the flow-through vessel is as far away as possible from the electric arc, so that there the slag in the edge area can largely be cooled for the formation of a permanent shell.

The invention is explained in more detail below with reference to the drawings.

F i g. 1 and 2 show two embodiments for a flow-through vessel in section

The in Fig. 1 illustrated flow-through vessel 1 is provided with electrodes for overheating the vessel located in the vessel Metal 3 provided. The metal melted in the melting vessel (not shown) comes together with the slag produced during melting through one in the lid of the flow-through vessel 1 located inlet 4 in the flow-through vessel 1. There is also a in the lid of the Durthlauf vessel 1 Device 5 for the continuous addition of lime. The metal 3 located in the flow-through vessel 1 flows through it a fox passage 6, which ends in an overflow 7, out of this, while the one on the metal 3 floating slag 8 is removed via a continuous slag drain 9. The flow-through vessel I is mounted by means of rockers 10, which are carried by rollers U to ensure complete emptying of the Ensure the vessel.

The flow-through vessel 1 has an approximately lenticular interior 12 which is just above the slag zone 13 has a horizontally offset part 14 is located on this horizontally offset part 14 patch material 15 in the form of dolomite to compensate for the damage caused by the slag attack Wear in the slag zone 13. Furthermore, there is indirect water cooling 16 in the area of the slag zone 13 is provided in the wall of the flow-through vessel 1 in order to cool it in the slag zone 13 and thereby to enable the formation of a permanent shell from slag or at least the Considerably reduce slag attack.

In the case of the in FIG. 2 embodiment shown there is a space between the lid of the Flow-through vessel 1 and the horizontally offset part 14 of the interior, which in turn is refractory Patch material 15 is filled in such a way that this gap is filled to avoid gas leakage will. By means of a screw conveyor öd. The like (not shown) can continuously patch material 15 be fed to compensate for the wear and tear on the refractory material in the slag zone 13.

Instead of a screw conveyor; a plow 17 can also be used, which is revolving and the refractory Material 15 pushes inwards. The space receiving the Fitckmaterial 15 becomes outward through a Water cooling 16 limited

1 sheet of drawings

Claims (2)

Patent claims: 1. Device for the continuous production of steel using scrap, sponge iron od. The like and corresponding ferrous metals, with a known melting vessel with one the use from below by a flame impinging burner and an outlet arranged at the bottom of the vessel and one below it attached, tiltable, exchangeable and heatable flow-through vessel with arc heating, which is equipped with a slag separator is provided, according to patent 23 25 593, thereby characterized in that the flow-through vessel (1) has an approximately lenticular interior (12), in which the slag zone (13) is at a great distance (13) from the arc, the Slag zone (13) by an indirect zone which is essentially limited to the area of this slag zone Water cooling (16) can be cooled and / or the flow-through vessel (1) in the area of the slag zone (13) runs out flat or is offset horizontally. 2. Apparatus according to claim 1, characterized by a device (17) for optionally continuous Supply of refractory patch material (15) from the outside.