SU1090737A1 - Checkerwork soaking pit - Google Patents

Abstract

A REGENERATIVE HEATING WELL containing a working chamber, a smoke vent from the valve, nom., A lid with cavities around the perimeter of the support rim with an air inlet and air vent inlets, characterized in that By this, the air vent is located in the receiving chamber, and the latter is connected to the flue gas through a pipeline.

Description

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The invention relates to ferrous metallurgy, in particular, to heating wells for heating steel ingots before rolling in the obkkimnyh mills. Regenerative heating BOXES are known) consisting of a working chamber lined with a refractory CIR peak, switching devices, a smoke vent with a booster, a valve and a lid covering the top of the working chamber. frame with stiffeners and arched vault. The massive support rim of the frame (its thickness in the lower part is 240-300 mm) is heated very unevenly due to the heat exchange with the hot frame of the walls of the shell and the outgoing hot burning products: in the lower part of the frame temperature reaches C, to the top, parts of it are 200-300 ° C. In the rim, destructive temperature stresses arise, which are amplified by rapid cooling of the rim with periodic opening of the well (removal of the IB side cap) for grafting and ingots. The temperature stresses lead to the formation of cracks in the metal, through which the hot combustion products are filtered, ff the process of exploitation, the cracks increase, burnouts form, and the lid goes out of order. Another reason for the low durability of the rim and its destruction is a decrease in the strength of cast iron at a high temperature (800-900С). The life of the spike is 6-8 months. The closest to the technical essence and the achieved effect to the invention is a regenerative heater well consisting of a working chamber, throw-over devices of the flue gas vent with a valve and a cover consisting of a cast frame, in the rim of which there are cavities with slit-like slots in the base through cooling air from the fan located on the lid 2 is supplied. The disadvantages of the well-known well construction are the complexity, bulkiness, considerable weight of the rim rim, difficulties in manufacturing the lining of the lid. These disadvantages are due to the fact that the electric motor with a fan and piping for distributing air into the rim of the well cover are located on the bottom of the well. The purpose of the invention is to increase the reliability of the well construction. The goal is achieved in that in a regenerative heating well containing a working chamber, a smoke vent with a valve, a lid with cavities around the perimeter of the support rim with an air inlet and an air vent inlet, in the upper part of the well there is a receiving chamber; in the receiving chamber, and the latter is connected to the chimney flue through a pipeline. On 4y1G. 1 shows a heating well, vertical section; in fig. 2 - a cover, a view on FIG. one; in fig. 3 shows the air inlet nozzle I in FIG. one; in fig. 4 receiving chamber, node II in FIG. 1. A regenerative heating well consists of a working chamber 1, regenerators 2, switch-over devices 3, a smoke vent 4, a valve 5 in the smoke vent 4, a bolt 6, in the support rim of which a cavity is formed around the perimeter 7. A cavity 7 on one end of the shaft 6 has an air inlet 8, and on the other end, an air inlet 9 nozzles. In the upper part of the working chamber 1, a receiving chamber 10 is made, connected by a pipe 11c with a smoke evacuating boron 4. The receiving chamber 10 has an opening 12 for; a joint with the air-outlet pipe 9 and an opening 13 for connection to the pipeline 11. The heating well is operated as follows . When the bolt 6 is installed on the well, the working chamber 1 is closed. At that, the air vent 9 enters the opening 12 of the receiving chamber 1P, as a result of which the entire cavity 7 is under vacuum by connecting it to the chimney. Atmospheric air is sucked through the air inlet 8 into the cavity, 7 in two parallel streams on the sides of the bolt, cools the rim of the bolt, then through the air vent 9 enters the receiving chamber 10 and from there through the duct 11 into the smoke exhaust 4. In the proposed construction of the sump well, due to the reduced load on the well cover (there is no fan with an electric motor and air supply pipelines), the massiveness of the lid is reduced, and consequently, when cooled with air The temperature differences of the mass of the pig iron and the destruction of the temperature 10 74 voltages in the rim are increased, and the service life of the cover increases. The present invention will reduce downtime heating wells associated with the replacement of outdated covers; Increase the service life of the covers; to reduce the consumption of cast iron for the manufacture of the Krshka well; save electricity. With the annual release of cast claps at the factory in the amount of 140 pcs. the total economic effect will be 240 thousand rubles / year.

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FIG. 2

Claims (1)

A REGENERATIVE HEATING WELL containing a working chamber, a chimney flue with a valve, a lid with cavities around the perimeter of the support rim with air inlet and * air outlet pipes, characterized in that, in order to increase reliability, a receiving chamber is made in the upper part of the well, while the air outlet pipe is located in the receiving chamber, and the latter is connected to the flue boron through a pipeline. about m 00 m 1 1090737 2