DE377212C - Open electric furnace with the insert connected to the circuit - Google Patents

Description

The invention relates to an electric melting furnace, in which the use in the Circuit is turned on and the electrodes are inclined so that their 5 upper parts together with the sockets and power supply lines attached to them except for the area of the ascending hot There are gases and flames.

What is new is the peculiar adaptation of the ίο shape of the melting hearth to the electrodes. As is known, a so-called heating circuit is located concentrically around the longitudinal axis of each electrode. Naturally, this is most clearly expressed in the case of pure arc heating. About proper heating To achieve this, the heating circuits must at least touch each other, but it is better to overlap.

Corresponding to these heating circuits is according to the invention by appropriate Indentation of the focal wall behind the electrodes and retraction between the electrodes one cylinder space each kept free, in such a way that the from the hearth wall to the hearth center to no longer materially exist, but to be imagined cylinder jackets overlap. Through the design of the stove and the arrangement of the electrodes is used in the narrowest range with the greatest possible limitation of losses through heat dissipating surface parts and dead Heating rooms Economy and efficiency of the furnace operation are essential elevated.

An exemplary embodiment of the subject matter of the invention is shown in Fig. 1 and 2 shown.

Fig. Ι is a vertical section through an open electric furnace without a vault and attached Shaft and

Fig. 2 is a horizontal section through the hearth at the level of the lower electrode ends.

The furnace shown is a three-phase furnace; α ¹ , α ² and α ³ are the electrodes whose

The number and size depend on the type of current used, the size of the furnace and the circuitry; In the present case there are three, b ¹ , b ² and b ³ are the clamp carriers or sockets for the electrodes, which by means of the insulated car c ¹ , c ² and c ^s in the inclined towers d ¹ , d ² and eP are movable, ie adjustable, parallel to the longitudinal axis of the electrodes. On the side facing away from the fire, the power supply lines e ¹ , e ~ and e * are connected to the tongs, which are completely away from the stove. If, depending on the intended use of the furnace, bottom electrodes f ¹ , f ² and f ^{3 are also} necessary, they can be arranged according to FIG. The furnace is fed with adaptation to the heating circuits in such a way that a cylindrical space remains free for the charging around the inclined electrodes. In order to avoid harmful, heat-consuming spaces between the individual electrodes, all spaces lying outside the cylindrical spaces concentric to the electrodes are filled by the lining, resulting in the oven space represented by the individual bulges g ¹ , g and g ^s.

Claims (1)

Patent claim: Open electric smelting furnace with the insert and connected to the circuit such inclined electrodes that their tops together with the sockets and power supply lines outside of the area of the rising hot gases and flames, characterized in that by corresponding Indentation of the focal wall around each of the electrodes an equiaxed cylinder space is kept free, of such a diameter that the outer surface of the spaces near the lower ends of the electrodes overlap. 1 sheet of drawings.