RU1775031C - Abutment beam of steel melting furnace roof - Google Patents

Abstract

Usage: steel furnace design. SUMMARY OF THE INVENTION In order to increase the resistance of the furnace roof by improving heat transfer in the area adjacent the roof to the beam, it is provided with two inclined baffles, the upper parts of which are secured between the pipes for supplying and removing the cooler. 2 silt

Description

The invention relates to the field of metallurgy, in particular, to the design of support beams for arches of steel furnaces.

The known design of the heel beam of the open-hearth furnace roof (S.M. Andonyev et al. Evaporative cooling of open-hearth furnaces Kharkov, 1957, pp. 97-99, Fig. 7-IV, 8-IV), which is a hollow body of triangular section, having a steam box adjacent to the upper edge of the beam cavity and serving as a steam collector for discharging the steam-water mixture. In the upper lid of the steam box there are two water inlets located at the edges of the beam, and one outlet of the steam-water mixture located in the middle of the beam 1.

A drawback of this design is that. that the steam box protrudes above the surface of the roof, forming an acute angle with the surface of the roof along the entire front and rear lines, thereby creating niches for accumulation of dust and debris. During the operation of the furnace, these sections of the roof must be cleaned regularly, as the dust

is a heat insulator and leads to overheating of the roof and its rapid wear

The closest in technical essence and the achieved result is the support beam of the arch of the open-hearth furnace (AS No. 579521, F 27 B 3/16. 1976), containing a hollow casing with a partition installed in the cavity of the casing, the upper of which is equipped with supply pipes and cooler outlet, and the bottom is divided by vertical partitions into sealed sections partially filled with a cooler.

A drawback of such a beam design is the difficulty of manufacturing it in terms of sealing sections located in the lower part of the beam cavity, as a result of which burnouts of individual sections are inevitable, which leads to emergency stops of the furnace. The steam box of this beam, as in the analogue above, is located above the surface of the arch and forms niches, which creates conditions for the accumulation of dust and debris, the cleaning of which is associated with considerable difficulties and is not feasible in full

WITH/

with

h |

Nj 01

Oh w

Gj

least due to the inaccessibility of places of their accumulation. The presence of dust and debris on the surface of the roof worsens the conditions of service of the roof, thereby reducing its durability.

The purpose of the invention is to increase the resistance of the roof of the steelmaking furnace by improving heat transfer in the area adjacent the roof to the beam.

The goal is achieved in that the fifth beam containing a hollow body with a partition installed in the cavity of the body and the supply and outlet pipes of the cooler, in contrast to the prototype, is equipped with two inclined partitions, the upper parts of which are secured between the pipes for supply and removal of the cooler.

In FIG. 1 shows the first beam, longitudinal section; in FIG. 2 - the same, transverse section.

The product beam contains a hollow body 1, in the cavity 2 of which inclined partitions 3 are installed. The body 1 is equipped with nozzles 4, 5 for supplying and discharging the cooler. The upper parts of the partitions 3 are fixed on the housing 1 between the nozzles 4 and 5 for supplying and discharging the cooler.

0

5

0

5

A cooler, for example, water, is supplied through the nozzle 4 and the lateral parts of the cavity 2 of the beam, separated from the middle part of the cavity 2 by two inclined partitions 3. When the walls of the housing 1 are cooled, steam forms which collects in the upper middle part of the cavity 2 and is discharged from the cavity 2 of the heel beam through the pipe 5. The upper part of the body of the fifth beam at the interface with the surface of the arch 6 has a smooth transition, which eliminates the conditions for the accumulation of dust and debris. Dust from the atmosphere is easily eliminated, as a result of which the service conditions of the steelmaking vault are improved and the durability is increased.

Claims (1)

Claims The invention is a merchandise roof of a steelmaking furnace, comprising a hollow body with a baffle installed in the body cavity and with cooler inlet and outlet pipes, characterized in that, in order to increase the resistance of the furnace roof by improving heat transfer in the area adjacent to the beam , it is equipped with two inclined partitions, the upper parts of which are fixed between the inlet and outlet pipes of the cooler.  4 2 Vi r / g 4 / i FIG. 1