SU1463764A1 - Arrangement for air cooling of blast furnace bottom - Google Patents

Abstract

The invention relates to the field of ferrous metallurgy, in particular to the structures of blast furnaces. The aim of the invention is to increase the durability of the floor and lengthen the turnaround time of the furnace. Bream blast furnace works as follows. The air for cooling the bottom is supplied through the nozzle 7 into the pipes 9, separates the heat from the highly heat-conducting layer 12, the bottom 4 and the graphitized blocks 3. The pipes 9 under the action of an uneven thermal floor move in the stuffing box fitting 7.8. In the case of a burnout, one of the pipes 9 is inserted into it, after removing the insert I1, a new pipe of a smaller diameter. The damaged pipe 9 is replaced by welding a new pipe from the insert 11 of the pipe 7 to its end. Then, the welded pipes are passed through a hole in the high heat conducting layer 12 until their joint appears at the insert 11 of the pipe 8, then cut off the damaged pipe 9 in place welds, and the ends of the new pipe 9 are stamped with new gland seals. 2 Il. a (l od co 4)

Description

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one

146376A

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 The invention relates to black metal, in particular to the construction of blast furnaces iJtHHM.

The aim of the invention is to increase the i-semie resistance of the floor and lengthen the turnaround time between the furnace.

Figure 1 shows a device for air cooling of a blast furnace bottom, a general view; figure 2 - node 1 in figure 1.

A device for air blast of the bottom of the blast furnace bottom (will hold a metal casing I, along the inner perimeter of which vertical refrigerators 2 are installed, in contact with the refractory graphical blocks 3 "installed- (mounted on the upper metal bottom | 4, made of planed plates I The metal casing I between the upper bottom A and the cold hermetic bottom 5, mounted on the foundation 6, has the inlets 7, the subcopper 1, is inserted into the pipe of the air cooling pipes 9, passes to the pipes 9, it takes heat from the high heat wire layer 12, from the upper bottom 4 and the trapped blocks 3 of the blast furnace bed, creating favorable conditions for the normal operation of the lower sealed bottom 5 installed on the foundation 6. With uneven thermal effect of the products of melting on the pipe system 9 air-cooled cooling pipes 9 As a result of the possibility of comoving the displacement in the gland seal 10, the nozzles 7 and 8 of the inlet and outlet collectors are moved to the required distance.

If a leakage occurs in the 20 gland seal 10, the removable insert 11 is removed during the operation of the furnace and the gland seal 10 is replaced or replaced. In the event of a burnout of one of the air tube 9

Dent 6, vrezan: nozzles / sub-ny perform its repair, non-watering collectors and nozzles from 25GH of operation of the furnace, by

at JLLf UJfi-f - - -

The inlet manifolds with the outboard housings 1 in the direction of the air-cooled pipe 9 of the bottom. The inlet and outlet ends of the air cooling pipes 9 are freely missed in the inlets 7 and 8 of the inlet and outlet headers, while the annular cavities between the outer surface of the air cooling pipes 9 and the inner surface of the pipes 7 and 8 are filled with a stuffing box 10. The pipes 7 and 8 of the inlet and outlet headers between the casing 1 and the headers are made with removable inserts 11, while the inlet and outlet Top.iJif.1 T4) 9 air-cooled bottom of the floor is installed with the high end of the furnace 1 and abut g anichnoy removable inserts plane P. The cavity formed by end plates 4 and 5, the air cooling tubes 9, the casing 1 and patrub- kami 7 and 8, is filled with high-heat layer 12 made of ug-, lerodistoy pastes or heat-resistant concrete, reinforced with metal fibers ,.

The device for air cooling of the blast furnace bottom works as follows, -.

The air for cooling the bottom of the bottom of the inlet manifold through the nozzle 7, hermetically embedded into the metal casing 1 with a high

 S1LH | and

stopping the operation of the furnace by inserting after removing the insert P into the inlet or Diverting end of the damaged pipe 9 of a new pipe less than 30 th diameter with subsequent packing of the new stuffing box 10. Replacing the damaged pipe 9 with a new pipe of the same diameter

water in the following order.

35 The old and new pipes are welded with the ends from the side of the removable insert 11 of the nozzle 7 of the inlet manifold. Then, the welded pipes are passed through the hole in the height 40 of the heat-conducting layer 12 in such a way that their place of joint is disposed in the section of the removable insert of the branch pipe 8 of the discharge manifold. After this, the damaged 45 pipe 9 is cut off from the new one at the place of their welding.

and the ends of pipe 9 are stained with new gland seals

The application of the invention makes it possible to increase the resistance of the bottom by 2U50 while simultaneously lengthening the interval of the furnace operating period by 2-3 years.

formula of

found

55

A device for air cooling of the blast furnace bottom containing air pipes

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the casing 1 is interleaved by air cooling pipes 9, passes to pipes 9, takes heat from the highly heat-conducting layer 12, from the upper bottom 4 and the corrugated blocks 3 of the blast furnace, creating favorable conditions for the normal operation of the bottom bottom of the air-tight 5 installed on foundation 6 In case of uneven thermal effect of smelting products on the system of pipes 9 for air cooling, pipes 9 as a result of the possibility of comoving the displacement in the gland seal 10 branch pipes 7 and 8 of the feed and discharge headers are placed at the required distance.

If a leakage occurs in the 20 gland seal 10 during operation of the furnace, the removable insert 11 is removed and the gland seal 10 is replaced or replaced. In the event of a burnout of one of the air tube 9

 repair it, do not

 it is repaired, executed by an oven, by

 S1LH | and

stopping the operation of the furnace by inserting after removing the insert P in the inlet or Diverting end of the damaged pipe 9 of a new pipe of a smaller diameter with subsequent packing of the new stuffing box 10. Replacing the damaged pipe 9 with a new pipe of the same diameter is performed in the next order.

5 The old and new pipes are welded with the ends from the side of the removable insert 11 of the nozzle 7 of the inlet manifold. Then, the welded pipes are progressively threaded through the hole in the high heat conducting layer 12 so that their interface is located in the section of the removable insert D1 of the branch pipe 8 of the diverting collector. After this, the damaged 45 pipe 9 is cut off from the new one at the place of their welding,

and the ends of the pipe 9 are stained with new gland seals 10.

The application of the invention will allow to increase the resistance of the bottom by 2UJU / 0 50 while at the same time extending the overhaul period of operation of the furnace by 2 to 3 years.

formula of

gaining

55

Device for air cooling-, day. Bottom of the blast furnace, containing air pipe

cooling pipes, inlet and outlet manifolds, installed in the openings of the furnace casing, have been supplied with the fact that, in order to increase the durability of the floor and lengthen the overhaul period of operation, and the exhaust headers are provided with removable inserts in the area between the casing and the collectors and are rigidly fixed in the holes of the casing, and the pipes

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air cooling protrude behind the furnace casing and adjacent the inlet and outlet ends to the boundary plane of the removable inserts and coaxially pass inside the pipes of the inlet and exhaust manifolds, while the annular cavities between the inner surface of the pipes and the outer surface Q of the air cooling pipes are filled with an omental seal.

Compiled by V.Kstsyubov Editor N.Gunko Tehred A.Kravchuk

Order 792/32

Circulation 530

VNRVSHI Go (; shock committee for inventions and discoveries at the State Committee on Science and Technology of the USSR 113035, Moscow, F-E5, 4/5 Raushsk nab.

Production and Publishing Combine Patent, Uzhgorod, st. Gagarin, 101

12 5

Fi8.2

Proofreader S. Shekmar

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Claims (1)

The claims ⁵⁵ A device for air cooling the bottom of a blast furnace area, containing air cooling pipes, nozzles for supply and exhaust manifolds installed in the openings of the furnace casing, which means that, in order to increase the durability of the flask and lengthening the overhaul period of the furnace, the inlet and outlet manifolds are equipped with removable inserts in the section between the casing and the collectors and are rigidly fixed in the holes of the casing, and the air cooling pipes protrude beyond the casing of the furnace and adjoin the inlet and outlet bubbled to the ends of the boundary plane removable inserts and coaxial about? they are inserted inside the branch pipes of the supply and exhaust manifolds, and the annular cavities between the inner surface of the branch pipes and the outer surface of the air cooling pipes are filled with an packing. Figure 2