DE937442C - Electric arc furnace with split lid - Google Patents

Description

The invention relates to an electric arc furnace, primarily for metallurgical Purposes, the cover of which is made up of an inner part and which are set by the electrodes consists of an outer ring. Such ovens have become known in the form that the Middle part is supported on the outer part in the operating position, but also in Chains can be held, it can also be lowered relative to the outer part. While with these types of construction the outer part rests permanently on the edge of the furnace and can only be lifted off together with the inner part, according to the invention Inner part of the cover in the operating position supported on a supporting frame, of which the outer ring can be removed completely or in individual segments when the inner part is at rest is, in particular it rests on radial ribs of the support structure for the inner cover part.

The invention has the advantage that you are in the operating position Remove the outer cover parts completely from the remaining inner cover part can, which is particularly advantageous at the beginning of the oven journey because then the furnace vessel is freely accessible from all sides for the piercing and covering work run and watch the oven run. As the furnace continues, you then cover the outer ring completely, but also at any time individual segments take it off again, be it to be able to watch the furnace, be it to sting or be it to remove a broken electrode end. With largely removed outer ring, individual segments can stop to power supply or to protect other parts from radiation from the furnace heat.

The supporting skeleton for the cover parts can be equipped with internal cooling be provided. In the drawing is an embodiment of the invention shown.

Fig. I shows the completely closed furnace; Fig. 2 shows a half plan view of this; Fig. 3 shows the furnace in the open state, and Fig.q. is the partial top view. .

The furnace vessel i is provided with radial support ribs: 2, which in a support ring 3 open. The inner cover ¢ rests on this support ring, which also the electrodes 5 and feed tubes 6 receives. On the shoring 2, 3 are a number of segments 7 are placed, which together form the outer cover ring. They can be removed, folded up or moved individually or in groups, like that that the inside of the furnace with the inner part standing still q. largely made accessible can be.

Fig. 3 shows how easily accessible the interior of the furnace is after removal of the Segments 7 is.

Claims (2)

PATENT CLAIMS: i. Electric arc furnace, the lid of which is off an inner one. the electrode carrying part and an outer xing consists of it characterized in that the inner part is supported in the 'operating position on a supporting frame is, of which the outer ring is wholly or in individual segments when the inner part is at rest is removable. 2. Furnace according to claim i, characterized in that the supporting structure consists of internally cooled tubes.