SU16322A1 - Electrode for electric ovens - Google Patents

Description

The present invention relates to an electrode for electric furnaces consisting of segmental shaped coal briquettes arranged in an iron casing, and consists of using an insulating casing and a framework of iron rods bonded to the casing of the electrode. The frame can be made of cast, penetrating both coal briquettes and insulating rim, in which case the iron casing is not necessary. The proposed design aims to secure the use of high voltage up to 500 volts and above, as well as to increase the efficiency of the furnace by reducing the losses of both electrical and thermal.

In FIG. 1. depicts a longitudinal view of the electrode in section; FIG. 2 shows it in section along the line AL in FIG. one; FIG. 3-part of the electrode indicating the method of attachment of the Insulating sheath and frame; FIG. 4 is a section along line B of FIG. 3; FIG. 5-electrode without an iron casing with a cast frame; FIG. b-section along the line of the state Duma in FIG. five; FIG. 7 is a section through the EZH lines in FIG. five; FIG. 8, 9 and 10-plate of the insulating shell with recesses for the frame in three projections; FIG. 11, 12 and 13 - coal segmented briquette with the same notches in three projections.

Coal briquettes 2 (Fig. 4), formed from coke, anthracite, etc. small items with graphite, are laid in an iron casing 1 and unstressed with wedges 7. The insulating shell surrounding the casing consists of refractory shaped plates 3, for example, chamotte, or from another similar material with high electrical resistance. An iron bracket .5 is molded into each of them, the ends of which protruding outwards enter the holes 8 of the casing 1 and are brewed in an autogenous manner. In order to improve the contact, the seams between the briquettes 2 are greased with resin and in them the framework of iron rod 4 is molded and ends welded to the casing 1. The two pieces of electrode are spliced by electric or autogenous welding of bent sides 9 of the casing 1 (Fig. 1). The junction is covered with an iron ring 6, the halves of which are superimposed on the electrode and welded. The ring 6 is in contact only with the insulating shell and as a result it is not under current. In the case of the electrode of FIG. 5-12, the plates of the insulating shell have the shape shown in FIG. 8-10, and are provided at the places where they are connected to each other. another mutually perpendicular grooved grooves forming the longitudinal and transverse channels Yu and 11. These 1 canals are poured with molten iron and obtained: at it. cooling the frame tightly covers all parts of the electrode. The outwardly projecting longitudinal serges 10 are formed by d, using tides 13, common rings 12 and 14, the latter of which serves to suspend the electrode and feed the current. The seams 15 between the coal briquettes are smeared with resin, but not too rich, so that it does not get into the seams 16 of the insulating sheath. (

When the electrode is executed according to FIG. 1-4 or FIG. 5-12, the resin with which the seams between the briquettes are lubricated is charred when heated and forms a strong bonding seam with good electrical conductivity. The chamotted shell at the place of origin of the volt arc is melted and gives the possibility to burn coal briquettes. Over the rest of the electrode length, the temperature is sufficiently low and the shell 3 prevents the electrode from cooling and at the same time eliminates the possibility of leakage and short-circuiting through the furnace body.

The subject of the patent. 1. Electrode for electric furnaces, consisting of preformed coal-packed segmental-shaped briquettes laid in an iron izhuzh1 | characterized in that the iron casing 1 is surrounded by an insulating sheath 3 made of refractory shaped plates, for example, chamotte, fastened to the casing 1 by means of iron brackets 5.

2. In the case of the electrode described in paragraph 1, the use of a frame of iron rods 4, fastened at their ends with an iron casing of one electrode.

3. When described in pp. 1 and 2 electrodes, the use of coal refractory briquettes of segmental shape, equipped with grooved recesses, forming longitudinal and transverse channels 10 and 11, poured with fused iron in order to obtain the frame connecting system.

FIG. one

FIG. 10

FIG. 2

f FIG. 3 3 U

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