SU48913A1 - Resistance kiln predominantly for calcining and graphitizing coal material - Google Patents

Description

The elimination of efficacy concerns the installation of a furnace of resistance. Essentially for calcining and graphitizing carbon material, with current being supplied through two horizontal carbon rings between which TOKi passes through the thickness of the material

In the schematic sectional drawing, the furnace is a cylinder lined with refractory bricks and having a truncated cone shape at the bottom. Its upper arch is terminated by a continuous feeder.

The lower part of the furnace ends with a hearth, equipped with a cooler and then with a discharge feeder. The current is supplied to the furnace, as already noted above, by means of two horizontal carbon rings / - /, // - //, consisting of moving 8 radial direction segments. changes of the ring section in the light. Insulating gaskets were used to isolate the segments from each other to evenly obtain current distribution over the entire cross section of the shaft. In addition to the possibility of adjusting the current lead rings in the upper electrode, a hole of such a diameter is provided that, due to the natural otkoSa of the material, a non-conducting gas should be created under the electrode near the furnace walls

The latter contributes to the direction of the current from the lining of the furnace to the center of the mine.

The proposed continuous-type electric furnace allows, according to the invention, to calcine any coal raw material with complete removal of volatiles, with the calcination of the coal raw material being converted into a more heterogeneous material with a significant content of graphite, which is less oxidizing and is. better conductor of electrical current than primary coal,

In the furnace, it is possible to utilize the completely released gases, which, after separation of the resin and dust, are partially again sent to the furnace shaft through the entire thickness of the material.

By passing gases, a certain goal is reached: heat is removed from the exiting calcined material and transferred to the loaded material, making it more electrically conductive, before starting the calcining.

At the same time, due to the positive pressure in the furnace, the combustion of the material is eliminated.

inventions.

i. A resistance furnace, mainly for calcining and grafting carbon material, with a supply of current through two horizontal carbon rings between which a current flows through the thickness of the material, characterized in that said rings consist of radially movable segments in order to change the ring section light.

2. In the furnace of claim 1, use blister pads to isolate the segments from each other.

3. In the furnace according to claim 1, utilize the exhaust gases by passing them through the thickness of the feed material.

4. In the furnace of claim 1, a device in the upper electrode has an opening of such a diameter so that, due to the natural slope of the material under the electrode, a non-conductive gas medium is created near the furnace walls to obtain a uniform current distribution throughout the shaft section.