SU748105A1 - Electric-resistance furnace - Google Patents

Description

(54) ELECTRIC OVEN RESISTANCE

one

The invention relates to electrothermal, in particular to electrical resistance furnaces, intended for graphitizing carbon blanks.

A known electrical resistance furnace, comprising a housing and current-carrying electrodes mounted in opposite walls of the housing, which are arranged perpendicularly to the longitudinal axis of the housing (1,

The disadvantage of such a furnace is the large heat and electrical losses, and the low quality of the processed materials.

The aim of the invention is to improve the quality of processed materials and reduce electrical and heat losses.

This goal is achieved by the fact that in an electric furnace resistive for graphitizing carbon materials, comprising a housing and current-carrying electrodes, mounted on opposite walls of the housing perpendicular to them, the electrodes are fixed on the walls parallel to the longitudinal axis of the housing.

FIG. 1 shows a furnace, top view; on fng. 2 is a section A-A in FIG. I; in fig. 3 is a section BB in FIG. I;

in fig. 4 shows a section B-B in FIG. I; on fng. 5 is a cross-section of the FIG. I.

The electric resistance furnace for the grafting of carbon materials comprises a casing consisting of plates I, supporting columns 2, end walls 3; The inside of the furnace body is lined with brickwork 4 with channels for cooling. The current-carrying electrodes 5 are fixed in opposite walls of the housing, arranged parallel to the longitudinal axis of the housing,

to perpendicular to housing walls. The current-carrying electrodes 5, made of graphite blocks, together with the graphite wall 6 form a current-carrying screen. Graphite steep is designed to create electrical contact between the core.

5 furnaces and current lead electrodes. The space between the concrete end wall 3 and the current-carrying screen is filled with thermal insulating filling 7.

2JJ The electrode blanks are placed horizontally, perpendicularly to the longitudinal axis of the furnace and parallel to each other with a distance between them of 0.2 diameter between the screen-current leads in the furnace space. The height of the billet stack ilpyr on each other without gaps. The intervals of the horizontal row are filled with metallurgical coke fraction of 10-25 mm. A package of blanks is surrounded by a heat insulating charge.

Up to the current-carrying electrodes 5, the front end of the tire is supplied with laminated ones, and up to the current-carrying electrodes of the second (rear) end of the bus, they are supplied with the mixtures.

Such an arrangement of the current-carrying electrodes of the furnace reduces the length of the unshielded part of the short network and contributes to a decrease in active and reactive resistance, a decrease in electrical losses by 2-3 / o, a uniform current distribution throughout the furnace, a decrease in heat losses by 2–2.5 times machined materials: uniform properties of the workpieces.

Claims (1)

1. USSR author's certificate 164369, cl. Р27 D 11/04, 09.04.62. J /