DE254047C - - Google Patents

Description

IMPERIAL

PATENT OFFICE.

The invention relates to an electrometallurgical electrode furnace, which particularly is suitable for the treatment of copper-containing ores and ore products, but also for the treatment of other metals, such as B. lead, etc., containing ores can be advantageously used.

In the furnace according to the invention, the electrodes are as far apart as possible Arranged over countersinks of the bath so that the current between the electrodes runs almost exclusively through the slag and therefore also almost the heat is developed only in it, and that the elec-

! 5 troden surrounded by the imported raw material will.

■ This collects in the recesses, one of which, by the way, would also suffice Metal or the metal-containing product. The depressions must therefore not be between, but must be arranged below or outside the electrodes, otherwise they would become live.

As an exemplary embodiment, a furnace is described below, which is particularly for melting roasted, powdery copper pyrites concentrate for the production of Kupferstein is intended.

In the drawing, which shows a vertical longitudinal section through the furnace, denote ι and 2 the electrodes, 3 and 4 recesses of the furnace bottom under the electrodes, 5 openings for removing the copper stone and 6 drainage openings for the slag.

The carbon or graphite electrodes 1, 2 are arranged in such a way that they are only a small distance below the surface of the molten Immerse slag 7, so that the heating of the bath by the resistance of the slag bath against the passage of current is effected. The bridge 8, which is an immediate conductive Connection of the melted copper stone 9 in the two depressions of the bath is prevented by one in it provided air duct 10 is cooled; water cooling can also be used if necessary. The powdery feed material

11 is constantly abandoned around the electrodes and melts by adding it to the Slag bath arrives. By this known per se charging method is achieved that those parts of the electrodes which are above the bath are always unmelted Charging are surrounded, which prevents the electrodes from burning off. As essential the part of the furnace wall at the level of the upper part of the slag bath is exposed to destruction Oven wall with a shoulder at this point

12 provided, stamped on the magnesite mass 13 that can be renewed at any time during operation. The furnace does not need to be taken out of service to be mended.

The slag drainage opening 6, which is arranged above the highest point of the bridge 8 is, is kept open during operation, so that the slag constantly drains off can. The copper stone is withdrawn through the openings 5 from time to time.

If it is said above that the current runs almost exclusively through the slag, so

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it is taken into account that with the furnace construction described it can happen that the furnace sole becomes more or less conductive when heated and consequently the Electricity partially runs through the furnace base.

Claims (1)

Patent claim: Electrometallurgical electrode furnace based on the resistance principle and with feed the raw material in powder form at the point where the electrodes are immersed in the bath from above, characterized in that the furnace sole with depressions of such shape and Position is provided that the molten metal outside the between in a relatively large distance mutually attached electrodes accumulates and the current between the electrodes is practical runs exclusively through the slag. ifrl For this purpose ι sheet of drawings.