DE4234936C1 - Windform holder in the shaft furnace tank - Google Patents

Description

The invention relates to a multi-part, cylindrical or frustoconical windform armor between the frame and locking armor of a shaft furnace, especially the blast furnace, to accommodate the wind forms for the hot wind injection.

In the prior art, the cooling ring is one Windform gas-tight in a windform holder frame used. These windform holder frames are individually in Welded openings of the windform armor. The Windform holding frames determine the shaft furnace their required minimum size the maximum on the Number of wind forms to be accommodated and set a further specific increase in performance, especially in large blast furnaces, natural limits. The compressed hot wind is at high speed blown into the interior of the blast furnace and should get as far as possible to the middle of the oven optimal gas flow through the pillar of furniture guarantee.

The disadvantage is that the windform frame because of required tolerances only after extensive measurement inserted in the assembled windform armor and can be welded. Another disadvantage is of that the windform holding frames are not butt to butt, but at predetermined intervals in the windform armor can be used, d. H. it has to go out Strength reasons between the individual Windform holding frame a minimum of windform armor remain.  

Due to the dimensions of the windshield frame and the Diameter of the shaft furnace in the area of the Windform armor is the number of armor on the perimeter of the Nozzle assemblies to be arranged in the shaft furnace.

From DE-GM 19 44 336 is a nozzle assembly for Blast furnace hot-wind nozzles known, the one with a resilient Pressure device for the blow nozzle is equipped. The Nozzle block has at least two symmetrical to the axis the blowing nozzle arranged on radially projecting parts of the nozzle stick end adjacent to the blowing nozzle Compression springs on against the lock nuts on the Oven wall hinged screws are supported.

A nozzle assembly, especially for a blast furnace, with one connected to a hot wind ring line Nozzle tip is described in AT-PS 3 73 283. The Nozzle tip opens into a full-walled ceramic Sintered mass made wind form. To support Windform and nozzle tip is a hollow in the Liner of the blast furnace limiting cooled Wind mold box inserted into the brick lining of the furnace. The wind form is opposite the nozzle tip with the help a ball joint movably mounted and by means of a further tight articulation compared to the Windform box movable.

The object of the invention is one as possible large number of wind forms on the circumference of the To accommodate the windform tank and the cooling rings, which are arranged on the circumference of the wind form openings, so great to make that blowing lances for Additional fuels introduced without difficulty can be.  

This task is solved in the way it is described in Claim 1 is specified. Other configurations the invention emerge from the subclaims.

With the help of bent (rolled) Windform armor segment sheets can be form annular windform armor. With the help of flat windform armor segment sheets can be polygonal windform armor.

The curved or flat segment sheets become Formation of a closed windform armor welded together.

In the version of the windform armor with flat Segment plates can do without welding if several wind form openings in a flat, appropriately extended segment sheet and this segment sheet between two Blow molding is kinked. That way also created a polygonal windform tank will.

Through the use of armored sheets of great wall thickness can be used in the wind form area of shaft furnaces the previously used wind mold holding frame is no longer required.

This embodiment of the invention, i. H. With thick-walled, curved (rolled) or flat Windform armor segment sheets, offers compared to the State-of-the-art designs have the advantage that the number of wind forms on the circumference of the Windformpanzers increased and that with the help of modern Machine technology and manufacturing methods all  Seating areas for the wind forms already in the Workshop can be machined. The larger wall thickness according to the invention Windformpanzer-sheet metal represents today's Workshop production no special requirements.

Since also the welding of the wind form holder frame omitted, there are considerable savings Welding work. Even the welded joint Use of individual segments on the vertical Butt joints do not have to cover the entire wall thickness of the Sheet metal can be done, but by appropriate Formation of the weld shape on the static required minimum dimensions are limited.

On the otherwise necessary reinforcement collar for the Wind form openings can be omitted.

Further advantages by using the invention Device result from the fact that a precise Overall arrangement of the wind forms and a remarkable Savings in assembly costs are made possible.

The current state of the art and Embodiments of the invention are as follows described in more detail with reference to schematic drawings.

Show it:

Fig. 1 shows the installation situation of a tuyere holding frame according to the prior art in the tuyere tank in cross-section,

Fig. 2 shows a segment of the tuyere tank of FIG. 1 with tuyere holding frame,

Fig. 3 shows the installation situation of a tuyere in the tuyere according to the invention in cross-section tank,

Fig. 4 is an arcuate segment plate of the tuyere tank according to the invention,

Fig. 5 flat segment sheets of the windform armor in the side view and

Fig. 6 flat segment sheets of the windform armor according to Fig. 5 and

Fig. 7 shows the installation situation of the wind form in the wind form armor according to the invention with an integrated cooling channel.

From FIG. 1, the installation situation of the tuyere in the tuyere tank (1) of a blast furnace according to the prior art is apparent. In the tuyere tank (1) Wind mold mounts (12) are welded, in which the cooling ring (13) is recessed to receive the tuyere (15) to the in the embodiment, an injection lance (16) through the tuyere opening (6), is fitted in a gastight manner.

The nozzle block tip ( 14 ) is connected to the nozzle block (not shown) with compensator, which is connected to the hot wind pipe.

The windform mounting frame ( 12 ) is also welded to the windform armor ( 1 ) which sits on the frame armor ( 8 ). Windform armor ( 1 ) and frame armor ( 8 ) are cooled in this area by a double jacket cooling ( 17 ).

The arrangement of the windform brackets ( 12 ) welded into the windform armor ( 1 ) with the windform cutout ( 6 ) can be seen from FIG. 2, which represents a segment detail of the entire annular windform armor ( 1 ).

In FIGS. 3 and 4, the tuyere tank according to the invention (1), which consists of curved segment plates (2) and serves for receiving the cooling ring (13) and the tuyere (15) with welded-injection lance (16) is illustrated. In the exemplary embodiment, the wind form armor ( 1 ) has an approximately two to three times the wall thickness compared to the prior art. It is welded to the frame ( 8 ) at the bottom and to the locking armor ( 9 ) at the top. The seating area of the cooling ring ( 13 ) in the wind form opening ( 6 ) is designed in the workshop in such a way that a gas-tight connection is established after the cooling ring ( 13 ) has been introduced.

Fig. 4 shows an arcuate section of the annular windform armor ( 4 ), which consists of curved windform armor segment sheets ( 2 ), in which the windform cutout ( 6 ) is incorporated.

In FIGS. 5-6, a further alternative solution is shown for the execution of the tuyere tank (1).

The polygonal windform armor ( 5 ) consists of individual flat windform armor segment sheets ( 3 ) of the same wall thickness, which are welded to each other via a butt seam ( 5 a).

With this solution, too, the wind form holder frame is not required. The wind mold ( 15 ) with its cooling ring ( 13 ) is fitted directly into the wind mold cutout ( 6 ) and forms a gas-tight connection.

Fig. 7 shows the windform armor ( 1 ) according to the invention, which is made of curved or flat segment sheets, with a cooling channel ( 7 ) incorporated circularly into the windform armor around each windform opening ( 6 ) with connections to the water cooling circuit of the blast furnace, not shown here.

Reference number list

1 windform tank
2 curved windform armor segment sheets
3 flat windform armor segment sheets
4 ring-shaped windform armor
5 polygonal windform armor
5 a weld or butt joint
6 wind form opening (detail)
7 Cooling channel in the windform armor segment sheet
8 armored vehicles
9 locking tanks
11 welded or butt weld
12 windform holding frames
13 cooling ring
14 nozzle tip
15 wind form
16 blowing lance
17 Double jacket cooling

Claims (4)

1. Multi-part cylindrical or frustoconical wind form armor between the frame and locking armor of a shaft furnace, in particular a blast furnace, for receiving the wind forms for the hot wind blowing, characterized in that the wall thickness of the wind form armor ( 1 ) corresponds to the permissible hole edge tension of the wind form openings incorporated in the wind form armor ( 1 ) ( 6 ) is designed. 2. Wind form armor according to claim 1, characterized in that the wind form openings ( 6 ) are introduced into curved wind form armor segment sheets ( 2 ) and the welded, curved wind form armor segment sheets ( 2 ) form an annular wind form armor ( 4 ). 3. Wind form armor according to claim 1, characterized in that the wind form openings ( 6 ) are introduced into flat wind form armor segment sheets ( 3 ) and the welded, flat wind form armor segment sheets ( 3 ) form a polygonal wind form armor ( 5 ). 4. Windform armor according to claims 1 to 3, characterized in that in the windform armor segment sheets ( 2, 3 ), circular around each windform opening ( 6 ), a cooling channel ( 7 ) with connections to the existing water cooling circuit is incorporated.