SU1601156A1 - Recuperative soaking pit - Google Patents

Abstract

The invention relates to devices for heating a metal before pressure treatment and can be used in the metallurgical and other industries. The goal is to improve the quality of heating ingots. A recuperative heating well containing a working chamber, a gas burner, an injector, a ceramic heat exchanger, louver, is equipped with a convective heating chamber formed by a heat wall of the well and heat insulated panels having an air inlet for cold atmospheric air, an exit aperture, hermetically jointed heat insulated air. for air intake of a ceramic heat exchanger, aeration opening for discharge of excess atmospheric air during the exposure period and dividing wall. 3 il.

Description

The invention relates to devices for heating ingots prior to pressure treatment and can be used in metallurgical and other industrial fields.

The aim of the invention is to improve the quality of heating ingots.

FIG. 1 shows a well; FIG. 2 shows a section A-A in FIG. 2; on fig.Z - section bb in fig. one.

A recuperative heating well, including a working chamber 1, a gas burner 2, an injector 3, a ceramic recuperator 4 with windows 5 for suction of atmospheric air and an air collector 6, louver 7, has a chamber 8 for convectively heating cold atmospheric air formed by a heat-deflecting wall 9 and heat-insulated panels 10, In the lower part of the chamber 8 there is an entrance opening 11c with louvers 7, in the middle part of the chamber 8 an outlet opening 12 and a heat-insulated air-distributing duct 13 connected to it, hermetically jointed From the window 5 for suction of atmospheric air, and in the upper part of chamber 8 there is a gas passage 14. Inside the chamber 8 there is a horizontal dividing wall 13, and metal needles 16 are mounted in the heat-insulating wall.

Colbdec works as follows

After the heated ingots are seated, working chamber 1 is opened.

SP

7, the injector 3 is turned on, cooling the atmospheric air through the inlet 1 of the 11 and partially through the aeration opening 14 is sucked into the chamber 8 of the Convective heating, where, washing the surface of the convective heat exchange developed by the horizontal dividing partition 15 and the metal needles 16, the heat account of the heat-breaking wall 9, then through the exit opening 12, the air distribution box 13, the windows. 5 for suction, ceramics recuperator 4, air collector b, J5 goes to gas burner 2,

As the ingots warm up, when during the BE period the heat loads from 1Feat to a minimum, and injector 3 is turned off, the louvers 7 and 20 are closed through the leakage into the chamber 8 and, in it, the excess of cold atmospheric air is heated. Under the influence of the pedrostatic pressure difference between the inlet opening 12 and the aeration opening 14, as well as the total production aeration, the excess atmospheric (Air is discharged through the aeration opening 14. Thus, the chamber 0 of convective heating allows to eliminate the flow into the ceramic cold atmospheric air recuperator to discharge redundant 1601156

heating, separated from the lower chas1

- horizontal dividing partition of 7.0x0.6 m; An exit opening of 1.2x0.6 m in size is made; the connecting heat-insulated distribution box with a transverse dimension of 1.2x0.6 m is sealed with windows for suction of the ceramic recuperator. In the upper part, the convection heating chamber has an aeration opening 1.0x0.6 m in size. In the heat-dissolving walls to a depth of 65 mm, the convection heating chambers have needles of a periodic profile of reinforcing steel with a diameter of 20-22 mm and a length of 300 mm in chessboard order. distance 100 mm from each other. The height of the convection heating chamber for over-discharge of the excess atmospheric air during the exposure period is assumed to be equal to the distance between the windows for suction of the ceramic recuperator and the injector axis.

The use of the proposed well provides an increase in the temperature of the air in the ceramic recuperator by 70-80 ° C, eliminates the excess air during the exposure period, reduces by 30-40 0 the temperature difference in the working chamber, reduces the ingot heating time by 20-30 min. located in the part of the working chamber

In addition to the ceramic burner, the air reduces fuel consumption by 2–2.5% and metal waste by 5–7% increases due to the reduction of ingot casting operations during heating between 6–8%. .

during the loosening period, increase the final temperature of air preheating in the ceramic recuperator, reduce the uneven temperature of the floor in the working chamber, reduce fuel consumption and metal waste, increase the turnaround time of the well.

Example. Recuperative heating wells with heating by one upper burner are placed in snow, in groups (according to the well head in each group). The free space between the heat barrier walls of the two adjacent wells is closed by thermally insulated panels and, using a common vertical panel, the resulting space is divided into two autonomous parts, each of which is a chamber for convective heating of the atmosphere.

- horizontal dividing partition of 7.0x0.6 m; an output aperture 1.2x0.6 m in size is made; a heat-insulated distribution box with a transverse dimension of 1.2x0.6 m is hermetically sealed with windows for suction of a ceramic heat exchanger. In the upper part, the convection heating chamber has an aeration opening 1.0x0.6 m in size. In the heat-dissolving walls to a depth of 65 mm, the convection heating chambers have needles of a periodic profile of reinforcing steel with a diameter of 20-22 mm and a length of 300 mm in chessboard order. distance 100 mm from each other. The height of the convection heating chamber for over-discharge of the excess atmospheric air during the exposure period is assumed to be equal to the distance between the windows for suction of the ceramic recuperator and the injector axis.

The use of the proposed well increases the temperature of the air in the ceramic recuperator by 70-80 ° C, eliminates the excess air during the exposure period, reduces by 30-40 0 the temperature difference in the working chamber, reduces by 20-30 min. the remaining heating time of the ingots located in the part of the working chamber.

adjacent to the burner, 2-2.5% with

It increases fuel consumption and metal waste by 5-7%, increases due to the reduction of ingot casting operations in the process of heating the overhaul period by 6-8%. .

Claims (1)

1. A recuperative heating well, containing a working chamber, a gas burner, an injector, a ceramic heat exchanger from the window for suction of atmospheric air and an air collector, blinds, which are different from the fact that, for the purpose of heating ingots, It is equipped with a convection heating chamber, formed by the heat wall of the well and the thermally insulated panel. ferric air of its heating lk, with an inlet for cold The well, At the bottom of the convection heating chamber, there is an entrance opening measuring 1.0x0.6 m with louvers. In the middle of the convection chamber atmospheric air, an exit aperture, hermetically articulated heat insulated air distribution duct with suction windows of keraatmospheric air, an outlet aperture, hermetically articulated heat insulated air distribution duct with suction windows Kera 16011566 recuperator, aeration .. Well under item 1, about t and h iproem to dump the excess atmosphere and that the heat-shielding air separation and separation wall of the convection heating chamber. Made with metal needles. I r 0US.1 BUT In b