RU20315U1 - REGENERATIVE HEATING WELL - Google Patents

Abstract

1. A regenerative heating well, comprising a housing lined with refractory bricks and a lid closed on top, gas and air regenerators, as well as the bottom of the chamber with passes in front of plasma windows laid out in the form of hearth pass plates lined with refractory bricks, characterized in that the passes are made with an enlarged height by installing a metal bar on the pass plate, and the height of the beam is 80-150 mm higher than the maximum level of liquid slag on the bottom of the well, in addition, the lining of the pass A slab with a beam is made in the form of a quarter of a sphere in two rows without through longitudinal seams with an emphasis on the beam, and the density of the masonry is provided by filling the chromium powder between the metal beam and the rows of refractory brick. 2. The well according to claim 1, characterized in that the metal beam is fixed to the overburden with tie bolts with a diameter of at least 40 mm and with a fastening step of 800-1000 mm, and to account for the linear thermal expansion of the beam, the holes for the bolts are oval.

Description

Regenerative heating well

A useful gyodel is used for metallurgy, in particular, for heating ingots in heating wells before rolling.

A heating well is known, in which, to improve the technical and economic performance of the well, to increase the overhaul life and durability of the lining, the channels of the upper and lower rows are made of equal cross section and converging at an angle of 10-14 towards the nozzle space, while the cross section of all channels is 0.15-0.30 total section

septum channels I.

A known method of refueling the bottom of the heating deck. The aim of the invention is to increase the overhaul life of the hearth of the heating well due to the rational distribution of refueling materials on the hearth

On the bottom of the heating wells, load solid lumpy materials and produce them throughout the entire area,

As the lump materials, the calcined 3iQwp fe pellets used in the blast furnace charge are used, the pellets being loaded in an amount of 0, 86 / o based on the weight of the heated ingots / 2 /,

However, these measures to increase the service life of the hearth are used in bulk with dry and dry separation.

A known regenerative gas heater containing refractory walls and a bulk nozzle, in which to increase the service life between the bulk nozzle and the refractory walls, a compensating gasket is installed, the thickness of which exceeds 1/2 of the thermal horizontal expansion of the nozzle / 3 7.

20011 10463

7 s 21 D 9/70 k This design does not provide sufficient masonry density due to the presence of compensated gaskets and through horizontal joints, which can lead to the passage of liquid slag into the gas heater. The closest in design to the proposed solution are heater wells used at the Shzhnetakhil metallurgical plant. The heating well contains a rectangular working chamber lined with refractory bricks; the top is covered by an eatable roof. On both sides, gas and air nasa 11; ki of regenerators adjoin the working chamber. In the places where the hearth adjoins the flamingos windows, the passes are made of refractory bricks. in the form of hearth shaped shaped slabs, lined with refractory 1 brick with wooden temperature gaskets to compensate for the thermal expansion of refractories / 4 /. The one-day construction does not provide sufficient masonry density due to horizontal seams in the pass masonry. In addition, this design has low mechanical strength, which, when the ingot falls, causes the destruction of the masonry pass and its shift towards regenerators. As a result, the liquid leaves the gas nozzle, the nozzle space and the gas hog, which leads to an emergency stop of the well. The objective of the utility model is to increase the density of refractory masonry pens (U10V cells of heating wells to prevent the penetration of liquid slag into the nozzles of regenerators, as well as to increase the mechanical strength of the passes from the effects of accidental ingots falling during landing and delivery., The passes are made

The task is achieved by the fact that the passes of the Harpevit well, located in front of the flaming windows, are completely open with an increased height due to the installation of a metal beam, the height of the beam being 80-150 mm higher than the maximum level of the liquid sack on the bottom of the well, in addition to the lining of the pass slabs with a bar are made in the form of a quarter of a sphere in two rows of bricks with an emphasis on the bar without through longitudinal seams, and the density of the masonry is provided by backfilling of chrome powder in the spaces between the metal bar and |) refractory poison poisons rpicha. In addition, a metal bar is fixed to the shaped plate with shy-shmi if the di-splitter is not less than 40 mm and with a fastening step of 800-1000 rlm, and oval forks are made for taking into account the thermal linear expansion of the bar. The utility model is illustrated in FIG. 1, in which: FIG. I is a longitudinal section of a heating well;

on the drawing showed the node P - this is the existing pass of the heating well;

FIG. 2 - node I in FIG. I - the proposed construction of the pass.

A regenerative heating well consists of a working clover I of a rectangular forgla lined with refractory bricks. The top is closed by a removable wing 2 lined with ribbed or stepped refractory bricks. On both sides, nozzles of regenerators 3, gas and air, adjoin the working chamber. Under the working chamber, I have lined with refractory bricks and is the supporting structure of the well. In the corners of the working chamber between the hearth 4 and the flaming windows 5, to prevent the passage of liquefied slag through the gas nozzles, a pass 6 is installed, which has basically a hearth pass plate 7. A metal beam 8 is installed on the hearth plate, which is fastened with tie bolts 9 with a diastro of at least 40 g and with a fastening step of 800-1000 mg, and taking into account the thermal linear expansion of the timber, the holes for the bolts make an oval forotl. The beam is installed so that the top edge of the beam is 80-150 mg above the maximum level of liquid 1plack on the bottom of the well. Lining of this design is carried out in the form of a quarter of a sphere 6 in two rows of bricks with a bump in the beam, and the refractory brick is laid without longitudinal seams, and the gap between the lining and the beam is covered with crisp powder | L 10. Primv).

Experimental work was carried out on the wells of the blshdang II50 of the Shzhnetshilsky metallurgical plant. To prevent the passage of the liquid donkey into the nozzles of the regenerators in the side walls of the wells between the hearth and the flame windows, metal bars of 260 x 320 gzh cross-section were installed. The bars were fixed to the pass plate with clamp bolts with a diameter of 40 mm and with a fastening step of 1000 mm. Given the thermal expansion of the metal, the adjacent bars were spaced 55 mm apart, and the bolt holes were made oval.

The lining of this design was carried out in two rounds of brick HP-7. The brick was laid without lengths of horizontal joints, and chrome-magnesite powder was poured into the gaps between the lining and the beam.

The distance between the upper edge of the metal β-beam and the max / height height of the liquid donkey was 120 tons.

This design has high mechanical strength, able to withstand the accidental fall of the ingot. It has a high masonry density and eliminates the possibility of accidental maintenance

liquid pshaka through the pass.

The use of the proposed technical solution provides double protection of the pass:

firstly, it excludes the possibility of liquid slag passing through the refinery of the masonry;

secondly, it allows to withstand mechanical impact during accidental ingot drops.

The proposed design of the pass allows to increase the overhaul life of the hearth of the heating spell by 30-50.

The inventive utility model is new, because no analogues from domestic and foreign sources of information are known.

Using the proposed technical solution at block-ming II50 of the Nizhny Tagil Metallurgical Plant confirms compliance with the criterion of industrial applicability.

R1 user literature

1.A.S. 1255654, C 21D 9/70, published. in bksh J 33, 1986

2.A.s. II08II7, C 21D 9/70, published. in bshl. No. 30, 1984

3.A.G. 1252346, C 2IB 9/02, published. in Bulletin I 31, 1986

4.Drawing of group I of heating wells, I 573.190, refractory steelwork, Nizhny Tagilok metallurgical plant.

Claims (2)

1. A regenerative heating well, comprising a housing lined with refractory bricks and a lid closed on top, gas and air regenerators, as well as the bottom of the chamber with passes in front of plasma windows laid out in the form of hearth pass plates lined with refractory bricks, characterized in that the passes are made with an enlarged height by installing a metal bar on the pass plate, and the height of the beam is 80-150 mm higher than the maximum level of liquid slag on the bottom of the well, in addition, the lining of the pass A slab with a beam is made in the form of a quarter of a sphere in two rows without through longitudinal seams with an emphasis on the beam, and the density of the masonry is provided by filling the chromium powder between the metal beam and the rows of refractory bricks. 2. The well according to claim 1, characterized in that the metal beam is fixed to the overburden with tie bolts with a diameter of at least 40 mm and with an attachment pitch of 800-1000 mm, and to account for the linear thermal expansion of the beam, the holes for the bolts are oval.