SU960510A1 - Ore restoring furnace bath - Google Patents

Description

(5) BATH CONDITIONAL ELECTRIC OVEN

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The invention relates to metallurgy, in particular to structures of electro-stoves for melting metals and alloys;

The known ore-reducing electric furnace, the bath of which includes a side and bottom lining of refractory bricks and carbon blocks, a metal casing and a layer of filling between the lining and casing 1.

I

Also known is the construction of a bath of an electric furnace in which the refractory masonry is made on the side carbon blocks installed relative to the casing with a gap filled with a packing mass 2,

The disadvantages of the known furnaces are the low service life of the bath lining due to the presence between the fire of the stop blocks and the metal casing of the air gap that is not filled with a refractory mass or backfill.

The purpose of the invention is to increase the life of the bath.

The goal is achieved by the fact that in a bath containing a metal casing and a lining consisting of

 side and bottom carbon blocks installed relative to the casing with a gap filled with heat-conducting packing mass and fire, 0 resistant masonry placed on the side blocks above the side carbon blocks between the refractory masonry and the metal casing made an additional layer of non-sintered core. vomnogo masses.

FIG. 1 shows the proposed bath, a vertical section; FIG. 2 and 3 - options for installing the gulls shell.

 The bath of the ore-reducing slab of the furnace consists of a lining including side and bottom carbon blocks 1, refractory masonry 2 installed on carbon blocks, a metal cooled casing 3 and a heat-conducting padding mass. Between the refractory masonry 2 and the metal casing 3 there is a gap filled with an additional layer of non-sintering padding, consisting of natural and artificial graphite and mineral oil.

After the start-up of the electric furnace and its heating, the carbon blocks 1 and the refractory masonry 2 expand, and the force is transmitted to the metal casing 3 through the packing mass. The mass gradually decreases Vtc and when the rated power is reached, the shrinkage can reach 50.

After stopping the furnace, the lining is cooled and the carbon blocks 1 are compressed. In this case, an air gap is formed between the casing 3 by the blocks 1, which is immediately filled with the mass flowing from the additional padding layer 5.

Consequently, at any moment of operation of the furnace, the tight contact of the surface of the refractory blocks 1 and the metal casing 3 through the heat-conducting mass is maintained, i.e. the thermal circuit is maintained for heat exchange of the bath lining with the environment.

Depicted in FIG. 2 and 3, the device provides for installation in the upper padding layer 5 of the shell 6, which contributes to the flow of the mass from the layer 5 downwards. Shell installation angle can be 1-10.

The optimum thickness of the packing layer 5, taking into account the shrinkage of the mass, is 0.75-3.5 thicknesses of the padding mass between the carbon blocks and the metal casing.

The implementation of the bath of the ore recovery furnace according to the invention makes it possible to increase the service life of the furnace, increase the reliability of its operation and increase productivity.

Claims (1)

1. Edneral F. P. Electrometallurgists of steel and ferroalloys. M., Metallurgists, 1963, p. . 2, VNIIETO Project No. 5 NT .301. Sat, 1975 (prototype).