KR960006355Y1 - Fire wall resuscitation device of metallurgical furnace - Google Patents

Abstract

None.

Description

Fireproof Wall Recycling Equipment for Metallurgical Kiln

1 is a schematic side cross-sectional view of a device according to the present invention operating in a horizontally installed cast kiln.

2 a schematic left side view of a carrier with an arm according to FIG. 1;

3 is an enlarged view of a single arm.

The present invention relates to an apparatus for use in the regeneration process of fire-resistant kiln walls in kilns for metallurgy, in particular steel making.

An apparatus of this kind is known from German Patent Publication No. 37 41 073. In this known configuration, the device is fixedly mounted on a support installed on the floor of the workplace. The kiln is loaded upright by the shop crane, ie into the support with the opening upward, and then the device on the support is lowered vertically and then in a horizontal plane perpendicular to the kiln axis perpendicular to the arm with the tool. By rotating, the tool travels along the surface of the kiln wall, hitting it with scratches to perform scraping.

The epidermis of the kiln wall is also called Skull. The skull consists of an attached slag layer and the top layer of the original kiln wall, in which slag and molten metal penetrate the surface. To remove it, it is subject to ensuring that the newly refracted refractory is reliably engaged with the remaining original kiln wall portion and that the kiln wall of the kiln is again compactly combined to form a resistant cylinder.

Working kiln walls generally do not wear completely uniformly. Even though the initial internal cross section was circular, after a series of melting processes, the surface was not uniform due to various influences. An important feature of the present invention is that the treatment of the surface layer to be removed from the kiln wall, according to the removal method of regenerating the almost cylindrical inner circumferential shape of the kiln wall (for removing the inner layer from the cylindrical liquid metal container, Germany As is known from patent publication No. 25 29 180). In the case of this known method, removal takes place from the surface of the kiln wall to the depth of the deepest grooves generated during operation and a large amount of still available kiln wall is removed, resulting in very high loss of kiln wall material. It means big.

On the other hand, in the known apparatus, as in the case of the present invention, the processing is faithfully performed on the contour, that is, the surface is hardened into a glass phase due to the impingement intrusion, without going deep and forcibly exhibiting a cylindrical inner circumferential surface. Ruptures into fine particles and becomes rough. The grinding element accurately crushes or strikes only a smooth surface onto the glass, not the entire kiln wall, allowing new thixotrope oscillations to adhere to the well roughened structure. The still usable portion present at a certain depth below the surface remains irrespective of the inner circumference of the purified kiln wall. The tool moves along the irregularities of the inner circumferential surface shape. Since only a limited amount of kiln wall material has to be removed, the surface treatment of the original kiln wall is very economical in relation to the kiln wall material, which is relatively fast and partly very expensive.

The homogeneous inner circumference of the kiln is then regenerated by filling the remaining portion of the mold lowered in the inner space of the kiln with thixotropic kiln wall material and compressing it vibratingly.

The support present in the configuration of the device known from German Patent Publication No. 37 41 073 requires a fixed space in the casting shop and has a fixed installation, and crane operation in the workshop on this facility should be considered. In addition, the kiln is upright and an unusable stripping material which has been removed is present at the bottom of the kiln, from which it must be pulled out before the introduction of new kiln wall material.

It is an object of the present invention to make the method of operation using the device of the aforementioned kind flexible and simple.

To achieve this object, an interspace between the mold and the surface of the damaged kiln wall is introduced by introducing a mold for roughening the surface of the original kiln wall according to the contour and then forming a kiln hollow chamber inside the kiln. Is filled with an injectable refractory, the refractory is compressed by vibration to combine with the remaining portion of the original kiln wall which is continuously present in the kiln to form an integrated coating, which can be introduced into the kiln in the direction of the kiln axis, A tool device rotatable about the kiln axis, the tool device being operatively coupled to the vibrating device, wherein a plurality of grinding elements invade the inner surface of the kiln wall and perform a piercing intrusion; Eggplant, the apparatus for use in the regeneration process of the refractory kiln wall of metallurgical kilns, especially steel manufacturing kiln It is provided with a freely available behaviors telescope type excavator of horizontal telescope jib expression of the refractory walls of metallurgical furnace that is installed on the extended end reproducing device.

An important advantage of the present invention is that the kiln walls can be removed while the kiln is horizontal and no longer requires a fixed support. Telescopic excavators can freely move to and from the workplace where the kiln is placed on wheels or on a caterpillar. This does not act as an inherent excavator function for accommodating excavable objects in the present invention but acts as an operating device of the tool device. Only a telescopic jib of the existing movable excavator is used without the need for a specially designed elevation device for transporting the tool device, ie the tool arm and the carrier with the tool, into the kiln.

The removed kiln wall material is taken forward from the opening of the kiln and does not need to be pulled out of the core of the kiln.

The use of excavators in the field of casting is known, for example, as shown in the advertisement of Wier Maschinenbau GmbH, in magazine steel and cast iron No. 11 (1992). However, it relates to the constant peeling of the kiln wall using a chisel-shaped tool. In the present invention, not a single tool is introduced deeply to break up the entire debris of the warp wall, but to grind the kiln wall along its surface only to give roughness to a very limited almost homogeneous depth.

In a preferred embodiment, the arm with the tool is provided to be dragged upon rotation in accordance with utility model registration claim 2, which allows particularly good tracking motion with respect to the irregularities of the kiln wall.

The controllable and flexible contact of the tool to the surface of the kiln wall while the arm moves is by means of power means actuated by a fluid pressure medium, which is in accordance with claim 4 of the utility model registration claim. Or it can comprise as a hydraulic piston / cylinder unit.

The tool is in the preferred embodiment configured as a cylindrical device rotatably supported in accordance with the utility model registration claim 5 and supported by a chisel-like grinding element around the grinding element, wherein the grinding element is a utility model registration claim 6 It can be configured as shallowly protruding protrusions provided around the cylindrical device according to the term.

The vibration device is preferably installed in accordance with claim 7 of the utility model registration, whereby it can act directly on the tool in its direction of operation and nevertheless not be disturbed.

In the drawings, an embodiment of the present invention is shown.

In FIG. 1, the device, which is designated as 100 in its entirety, is equipped with a telescopic excavator 10 and a tool device 20. The telescopic excavator 10 is movable on the caterpillar 1, has a frame 3 rotatable about a vertical axis 2 and supports a telescopic jib 4, and the telescopic jib ( As can be seen from Fig. 1, 4) is installed almost horizontally in the standard state, but can be rotated up and down within a certain angle range with respect to the axis in the range of the frame 3.

On the extension end 4 'of the telescopic jib 4 on the left side of FIG. 1, the carrier 7 of the tool device is installed on the support pin 6 via the coupling device 5, and the tool device is provided with a horizontal axis ( Driven in the direction of arrow 8 with respect to 9). The tool device 20 supports the external tool 30, and the external tool 30 is the inside of the kiln wall 12 of the kiln, which is used for steel manufacturing in this embodiment of metallurgy, which is indicated by reference numeral 40 in its entirety. Contact surface 11. The kiln 40 has a deep pot-shaped outer housing 13 made of steel sheet. The kiln 40 is transported by workshop crane to the position shown in FIG. 1 and mounted on the support structure 14 or otherwise supported.

As can be seen in FIG. 2, the carrier 7 has two nearly octagonal plates 15 spaced apart from each other in the direction of the axis 9, and are mutually 90 ° displaced between these plates 15. The same length beams are welded together and together with the plates 15 form a solid cross beam structure. The length of the beam 16 is less than the minimum kiln radius considered when measured from the axis 9.

At the free end of the beam 16, an arm 18 is provided on the rotary pin 17 parallel to the axis 9, and a tool 30 is provided at the free end of the arm 18.

Since the arm 18 is provided to the beam 16 to be pulled in its rotational direction 21 (FIG. 2), the tool 30 freely rotatable at its free end is an inner surface of the kiln wall 12. It can be rolled easily at, making it particularly adaptable to radial differences. In FIG. 2 the kilns with various inner diameters are indicated and their inner surfaces 11, 11 ′, 11 ″, 11 ′ ″ have different angle positions of the arm 18 relative to the beam 16. The tools 30 are in contact. As a result, the unevenness of the inner surfaces 11, 11 ', 11 ", 11' " in the form of irregular grooves having projections and projections in the radial direction generated during operation of the kiln is also overcome.

The radial actuation of the tool 30 in the direction of arrow 25 (FIG. 1) is by means of a pneumatically actuated piston / cylinder unit 19, which is indicated by the dashed line in FIG. Only one end is shown and one end thereof is connected to the pin 23 of the carrier 7 and the other end thereof is connected to the pin 24 which is almost at the center of each adjacent arm 18 to rotate the arm 18.

Movement in the direction of the arrow 26, i.e., in the direction of the kiln axis 9, is achieved by the telescopic jib 4 performing the corresponding operation when the work is advanced.

The inner surface 11 of the kiln wall 12 of the kiln appears to be worn after a certain number of temporary melting, and must be regenerated. This lowers the mold (not shown) corresponding to the desired kiln hollow chamber into the kiln 40 in such a state, and is injectable which can be flowed and compressed by vibration between the mold and the worn but reprocessed surface 11. By filling the refractory material. In a preferred embodiment, a refractory with thixotropy is used because it requires only 4% to 5% water content, which of course promotes drying of the compacted refractory prior to reuse of the kiln.

In order to realize a firm bond between the newly stacked refractory and the original kiln wall existing below it, the surface of the original kiln wall must have the possibility of capturing new kiln wall material, i.e. when the kiln is finally turned off It should not be as smooth as glass. The loading of new refractory on such surfaces will result in insufficient adhesion and adversely affect the fire resistance of the kiln walls. The purpose of treating the inner surface 11 of the kiln wall 12 using the apparatus 100 is to obtain roughness that promotes adhesion and to maintain as much depth as possible of the raw kiln wall that is still available. It is subject to acting only on the surface part. Due to the various erosion of the steel radiation heat and general local vortices in the bad at the time of steel loading, there are prominent irregularities on the inner surface 11 after many kiln operations, that is, uneven waveforms occur. The removal operation is made so that the surface irregularities are maintained almost intact by the present invention.

Such processing is carried out by means of a tool 30 installed at the free end of each arm 18 and freely rotatable with respect to the pin 31 parallel to the kiln shaft 9. The tool 30 is provided with the cylindrical body by which the sharp protrusion 33 which consists of hard metal on the surface is distributed uniformly (FIG. 3). The tool 30 may be made up of individual discs which have protrusions 33 formed on the outer circumference and which can be combined into the cylindrical body 32.

As can be seen in FIG. 2, the tool 30 contacts the inner surface 11 of the kiln wall 12 at one side 34. A vibrator 22 is provided on the side of the arm 18 opposite the contact point 34 in the action direction perpendicular to the inner surface 11 at the contact point 34, which is a piston vibrator in this embodiment. It is configured to provide a blow toward the inner surface to the tool (30).

Attachment of the projection 33 causes the particles to rupture and fall to the desired depth by crushing or knocking the inner surface 11 of the kiln wall 12, which is smoothly covered with hard glass. As a result, the new surface of the still available kiln wall material is severely roughened, and the new thixotropic kiln wall material is well bonded to the roughened surface.

The tool 30 moves in the direction of the kiln axis 9 in the direction of the arrow 26 and rotates in the direction of the arrow 8 to move its circumferential area over the entire inner surface 11 of the kiln wall 12. do. In practice, it is known that the bottom of the kiln wall need not be treated strongly using the tool 30. In inevitable cases, it is preferable to use hand tools for partial purification and roughening.

Claims (7)

The surface of the original kiln wall 12 is roughened according to the contour, and then a mold is formed to form a kiln hollow chamber into the interior of the kiln 40, and the surface 11 of the kiln wall 12 damaged with the mold. Filling the interspace therebetween with injectable refractory, the refractory being squeezed by vibration to combine with the remainder of the original kiln wall 12 continuously present in the kiln 40 to form an integrated coating, In the kiln 40 is provided a tool device 20 which can be introduced in the direction of the kiln axis 9 and is rotatable about the kiln axis 9, the tool device 20 working with the vibrator 22. Coupled to the inner wall 11 of the kiln wall 12 and having a tool 30 mounted on the arm 18 with a large number of crushing elements performing striking intrusions. Device for use in the regeneration process of fire-resistant kiln wall (12). For example, the tool device 20 is installed on the extended end 4 'of the horizontal telescopic jib 4 of the freely movable telescopic excavator 10, wherein the fire wall regeneration of the metallurgical kiln is characterized in that it is installed. Device The fire wall regeneration apparatus for metallurgical kiln according to claim 1, wherein the arm (18) is provided to be dragged in relation to the rotation direction (21) of the carrier (7). The fire wall regeneration apparatus of a metallurgical kiln according to claim 1 or 2, wherein the arm (18) is movable by a power unit. 4. The fire wall regeneration apparatus of a metallurgical kiln according to claim 3, wherein the power unit is a pneumatic or hydraulic piston / cylinder unit (19). 3. The tool 30 according to claim 1, wherein the tool 30 is rotatably supported at the free end of the arm 18 about an axis in the same direction as the kiln axis 9, with a grinding element around it. A refractory wall regeneration device for a metallurgical kiln, characterized in that it is configured as a cylindrical device (32) provided. 6. The fire wall regeneration apparatus for metallurgical kiln according to claim 5, wherein the grinding element is composed of shallowly protruding protrusions installed around the cylindrical device (32). 3. The metallurgical kiln according to claim 1 or 2, wherein the vibration device (22) is installed on the opposite side of the kiln wall (12) at the end of the arm (18) adjacent to the tool (30). Fireproof wall regeneration device.