SU621949A1 - Steel-making set - Google Patents

Description

one

The invention relates to ferrous metallurgy, more specifically to the structures of double-bath steel-making units.

A steel-making unit is known, containing two melting baths with drain socks and working windows, mounted on cradles and covered with vaults with openings for introducing heat sources into the furnace, suspended from semi-portals mounted on separate foundations. The transformer, which is an electrical power supply source, is installed on the side of the working windows and is extended to the melting bay of the workshop.

A disadvantage of the known construction of the steel-making unit is the difficulty in servicing the smelting baths, due to the fact that the transformer occupies a large area in the furnace span in front of the working windows. Its maintenance requires very precise rhythmic work, which is very difficult in the conditions of the metallurgical plant. In addition, this unit is equipped with only two arches installed on the melting bath. This makes it difficult to maintain, since the introduction into the bath of SOURCES of heating through the holes made in the arches requires

great ACCURACY.

The aim of the invention is to improve the composition of the steelmaking unit.

For this, a steelmaking unit is proposed containing two smelting

baths with DRAIN socks and working windows, located at the working platform level and covered with vaults suspended from three semi-portals that also carry electrical and fuel sources

heating, and a furnace transformer, characterized in that the furnace transformer is located under the working platform, and the number of arches is equal to the number of semi-portals, and the melting baths are arranged so that their axial lines passing through the drain socks form an angle of 30-90 ° at the intersection . . FIG. 1 shows the proposed steel-smelting unit, top view; on

FIG. 2 - the same, side view.

The proposed steel-making unit consists of two smelting baths 1 and 2 with DRAIN socks 3. The baths are located at the level of the working platform 4. From above

Baths are covered with interchangeable arches 5, 6 OR 7, in the holes of which the SOURCES of heating are installed: electric (electrodes) 8 and fuel (burners) 9 and 10. Electric heating sources are suspended from the half portal 11, which is installed on a separate foundation. The semi-portals 12 and 13, which carry fuel heating sources (burners) 9 and 10, are rigidly connected to the casing of the melting baths 1 and 2, but their installation on a separate foundation is not excluded. The furnace transformer 14 is installed under the working platform 4. It is connected by tires 15, conducted through the shaft 16, with electrical heating sources (electrodes) 8, before the melting baths 1 and 2 are arranged so that their axes passing through the drain socks 3 intersect under angle of 30-90 °.

The proposed steelmaking unit operates, for example, as follows.

After loading the charge materials into the smelting bath 1, semiportal 12, carrying fuel sources of heating for burner 9, and roof 7 is turned, and bath 1 is covered with roof 7, burners 9 are installed in the openings of which burners 9 turn off and heat the charge to 1300-1400 , while the fuel consumption coefficient is quite high and the use of fuel is economically feasible. After the charge is heated by the burners 9, the roof 7 is raised, and the half-portal 12 is retracted to the side. Then, the semi-portal 11 carrying the electrical heat sources (electrodes) 8, together with the roof 5, is turned to the bath 1 and covered with the roof 5. The electrical arcs are ignited and the heated mixture is heated and melted until it is completely melted. At this time, the semortal portal 13 is turned to the bath 2 loaded with schittovykh materials, and covered with a vault 6, in which holes the fuel heating sources (burners) 10 are installed, and the heating of the charge loaded in the smelting bath 2 is heated. 13 together with the roof 6 is turned to the side, and the half portal And together with the roof 5 they turn from the melting bath 1 to the bath 2, cover the bath 2 with the roof 5 and heat the heated mixture with electric arcs. At this time, bath 1 is fed to semi-portal 12, arch 7 with burners 9, and the melt is purged with oxygen or an oxygen-gas mixture, after which the finished melt is released from the furnace. After discharging, the smelting bath 1 is cleaned, charged, filled up with a binder, then covered with a vault 7 and the mixture is heated with burners 9. At this time the bath 2 completely melts the electric charge

arcs that are then disconnected, and the roof 5 with electric sources of heating is rearranged to the melting bath 1, and in the melting bath 2 the melt is blown over, covering it with roof 6. After that, the finished melt is discharged from the bath 2. Then all operations but the maintenance of baths 1 and 2 are repeated. The use of steelmaking unit

The proposed construction is capable of reducing the capital costs of the construction of structures, since it will take up much less space than known structures. In addition, the location of the transformer

under the working platform allows to free up space, both in casting and in the furnace spans. This ensures both good servicing conditions for the smelting baths and improves the working conditions in the casting bay, since the baths' position at an angle of 30-90 ° makes it possible to manage only one groove for the installation of the ladle into which metal can be produced from both smelting baths. Providing each semi-portal with a separate code not only facilitates the work of the service personnel, but also due to the smaller course of the electric heating sources, it reduces electrical losses in a short network and thereby increases the electrical efficiency of the installation.

Claims (1)

1. Philip Carden “Steel Times, 1972, No. 3, p. 297-299. / g II uii / lt- sLj // L