CN214496367U - Wall plate protection system for metallurgical furnace and metallurgical furnace wall plate body - Google Patents

Abstract

The utility model discloses a wallboard protection system and metallurgical furnace wall plate body for metallurgical stove, wallboard protection system are including being suitable for inserting at least one installation pole in the space between the adjacent rib of wallboard to and be suitable for fixing to a plurality of increase volume body of at least one installation pole. The metallurgical furnace wall plate body comprises a front face and ribs on the front face, wherein at least one mounting bar is fixed to the front face in the space between adjacent ribs, and wherein a plurality of buildups are fixed to each mounting bar. The installation of the system can be carried out on the panels still installed in the metallurgical furnace, so that production can be resumed with a significant reduction in downtime compared to the case where the worn panels have to be completely replaced.

Description

Wall plate protection system for metallurgical furnace and metallurgical furnace wall plate body

Technical Field

The present invention relates to a panel protection system for a metallurgical furnace (e.g., a blast furnace).

Background

Conventional blast furnaces include several sections and components, including a chimney, a waist, a belly, a tuyere, a hearth, and a tap hole. The inner shell of the blast furnace may be protected by water cooled cooling plates (called staves) which protect the inner shell from overheating during the reduction process carried out in the furnace. Modern wall panels are typically constructed of copper or copper alloys, although other materials (e.g., steel or cast iron) may be used.

As the solid raw material filled into the furnace descends through the furnace, the wall panels are susceptible to wear from the solid raw material. Wear due to descending burden and outward pressure exerted on the wall panel surface may occur locally at one or more locations of the wall panel or wear or thinning across the entire surface of the wall panel. In particular, coke is very abrasive.

Efforts have been made to design wall panels with longer service lives.

It is known to reduce wear of the wallboard by forming a solidified slag accretion on the front face of the wallboard during operation. To this end, the wall plate has a machined front or hot face that includes ribs and grooves that hold build-up to the wall plate. A portion of an exemplary copper wall panel of this type is shown in fig. 1.

An improvement to this concept is the addition of a front protective material or cladding that is harder than the copper base material, but still allows the protective build-up layer to be formed by solidification on the face. This is achieved by using a combination of silicon carbide and graphite bricks as shown in figure 2, which shows a copper wall plate and its cross-section.

WO2009/147192 describes a wall panel having a front face comprising ribs and grooves forming anchoring means for anchoring a refractory brick lining, a refractory guniting or a process-generated build-up layer to the face. A metal insert is provided in the recess as schematically shown in fig. 3. The metal insert covers the side walls of the rib to protect the rib from corrosion. However, a possible problem with this solution is that the metal insert may be prone to deformation and/or buckling and by using a thermally conductive material that is less thermally conductive than the wall plate body (when copper), the thermal conductivity of the wall plate is reduced, which may affect the solidification of the protective build-up layer.

Referring now to fig. 4, it has been proposed to place a plurality of protruding rectangular blocks in each recess of a face of a wall plate, the blocks being spaced apart from one another along the length of the recess. The blocks may comprise silicon carbide or some other hard material, thereby providing a protective coating for the face of the panel. The blocks are separated from each other by shorter spacer inserts. The insert may protect the wall panel in the area between the blocks. As shown in fig. 4, the blocks are preferably staggered between the grooves to provide a checkered pattern on the wall panel.

Thus, existing solutions for reducing wear rates of wallboard include:

i) installing a refractory/ceramic wear-resistant lining in or in front of the wall panel;

ii) installing a tab at the front face of the wall plate to promote thicker build-up; and

iii) installing the cladding within the machined shape at the front.

Even with efforts to increase the service life, wallboard sometimes cannot be safely used in production. Replacing the full panel means labor and capital intensive work and long downtime of the metallurgical furnace. Thus, there is a need for a solution that allows safe production after shorter downtime with less labor and less capital.

SUMMERY OF THE UTILITY MODEL

According to an aspect of the present invention, there is provided a panel protection system for a metallurgical furnace, the panel protection system being adapted to be retrofitted to existing panels, whether worn or new. The wallboard protection system comprises:

-at least one mounting bar adapted to be inserted into the space between adjacent ribs of the wall panel,

-a plurality of augmentations adapted to be fixed to at least one mounting bar.

When using a panel equipped with an installed panel protection system, the augmentor is capable of holding solidified slag accretions thereto. They are used to create a plurality of recesses arranged on the front face of the wall plate; the augments protrude from the front face of the wall panel such that, in use, burden material is trapped in the space between adjacent augments to provide a protective layer of burden material on the front face of the wall panel. Each augment includes at least one body portion, but it may also include several body portions that together form the augment.

To install the panel protection system, a mounting bar is inserted into the space between adjacent ribs of the panel and secured to the panel. The augment is secured to the mounting rod either before or after insertion and/or securing to the wall plate; i.e. when the installation is completed, the panel augmentation body is mounted on a mounting bar which is itself fixed to the panel. The mounting posts secure the augment and provide a thermally conductive path to the wall plate to provide cooling during operation.

The mounting bar is formed to be adapted to be inserted into a space between adjacent ribs of the wall panel. Preferably it is formed such that it fully engages any wedge shape of the space, thereby preventing it from falling out of the space. The mounting bar may be made of copper.

The shape of the augments is preferably such that the solidified slag has a good grip for holding. The augmentor provides a coating to the front (or hot side) of the panel that promotes the formation of a protective layer of burden on the front when the panel is used in a furnace.

The configuration and arrangement of the augments (e.g., their offsets and geometries) facilitates charge material being trapped by or between the augments as the charge material flows under the influence of gravity. For example, charge material can become trapped as it passes over the flow guide surface. The augmentor may have a polyhedron, such as a hexagon, and thus have inclined deflector surfaces, which advantageously allow burden to be distributed and trapped on the faces of the wall panels simultaneously in multiple directions.

The augment is secured to the mounting bar and the mounting bar is secured to the wall plate by suitable securing means, which may be, for example, screws, anchors, T-bolts, anchor bolts.

As used herein, "charge" refers to one or both of the following: (i) iron-bearing materials in the blast furnace, such as iron ore or iron ore pellets, and (ii) blast furnace slag, which is formed when iron ore or iron shot, coke, and fluxes (such as limestone or dolomite) are melted together in the blast furnace and then solidified.

Each augment includes at least one body portion, but it may also include several body portions (sections) that together form the augment. To form the augments, they may be held together by a retainer.

The segments and/or the retainer of each insert may comprise a metallic material. The metallic material may include copper, copper alloy, steel, or cast iron.

Each of the sections may be separated from adjacent sections by a gap.

According to another aspect of the present invention, there is provided a metallurgical furnace wall plate body comprising: ribs on the front face and the front face, wherein at least one mounting bar is secured to the front face in a space between adjacent ribs, and wherein a plurality of augments are secured to each mounting bar.

The augments may be arranged in a uniform pattern. The uniform pattern may include an array having rows and columns. Preferably, the augments are mounted such that they are arranged on the metallurgical furnace wall panels in an array having rows and columns. If the augments have a hexagonal shape, they may thus provide a honeycomb pattern on the metallurgical furnace wall panels.

Preferably, the bulk body protrudes from the front face of the wall body.

Preferably, the plurality of augmentations extend beyond adjacent ribs that are contiguous with the mounting body.

Use the utility model discloses a wallboard protection system establishes the utility model discloses a metallurgical oven plate body has following advantage: the installation of the system can be performed on a wall panel still installed in the metallurgical furnace. Thus, production can be resumed with significantly less downtime than would be the case if the worn panel had to be completely replaced. The mounting bar allows the augment to be installed even if it is not possible to secure the augment directly to the wall. The panel protection system of the present invention may also be installed on a new panel body before it is installed in the metallurgical furnace.

By thermally insulating the walls of the furnace from accretions, the service life can be easily extended and the operating costs can be reduced, thereby saving coke.

Drawings

Embodiments will now be described, by way of example, with reference to the accompanying drawings, in which:

fig. 1 shows a portion of a conventional copper wall plate for a furnace.

Fig. 2 shows a conventional copper wall panel comprising silicon carbide and graphite bricks.

Fig. 3 shows a portion of a conventional copper wall panel including a metal insert.

Fig. 4 shows a portion of a conventional wall panel including a metal insert and a protruding rectangular block.

Fig. 5 shows a variation of the wallboard protection system of the present invention.

Fig. 6 is a variation of the volume of the panel protection system of the present invention.

Fig. 7 schematically shows a variant of a worn wall plate.

Fig. 8 shows a portion of a panel body of the present invention.

Detailed Description

Referring to fig. 5, a variation of the mounting bar 100 of the wallboard protection system of the present invention is schematically illustrated. The mounting bar may be made of copper. As shown in fig. 7, the mounting bar 100 is adapted to be inserted into the space between adjacent ribs 200 of the wall plate 300. A plurality of augment bodies 400 may be secured to the mounting bar 100.

Referring to fig. 6, a variation of the augment 400 of the wallboard protection system of the present invention is shown. The augment 400 is adapted to be secured to the mounting bar 100, as shown in fig. 7.

Referring to fig. 7, a worn wall panel 300 is schematically illustrated. The area of the wall panel ribs 201, 202, 203 have worn away while the other ribs 204, 205, 206, 207 are largely undamaged.

Referring to fig. 8, a portion of a panel body 500 according to the present invention is shown based on fig. 7. On the front face of wear wall plate 300 (the area of which is depicted), mounting bar 100 inserted into the space between wear ribs 201 and 202 is secured by anchor bolt 600. The two augment bodies 401, 402 are secured to the mounting bar 100 by three-headed bolts, not specifically depicted. The representation of the other augmentations is omitted for clarity.

Through using the utility model discloses a wallboard protection system helps will increase the body and install the wallboard evenly, especially the wearing and tearing region of wallboard because the installation pole provides even connection area to increasing the body, simultaneously through adapting to its rib design and light fixed to the wallboard. The installation can be carried out on wall plates installed in a metallurgical furnace. The augments provide additional protection to the panel (especially worn panels), and are preferably aligned such that the resulting surface pattern traps burden in the void, forming a self-protecting sacrificial wear layer.

List of reference numerals

100	Mounting rod
		200	Rib
201	Rib
		202	Rib
203	Rib
		204	Rib
205	Rib
		206	Rib
207	Rib
		300	Wall panel
400	Amplification body
		401	Amplification body
402	Amplification body
		500	Wall plate body
600	Anchor bolt

Claims (2)

1. A panel protection system for a metallurgical furnace, the panel protection system comprising: at least one mounting bar adapted to be inserted into a space between adjacent ribs of the wall panel, and a plurality of augment bodies adapted to be secured to the at least one mounting bar.

2. A metallurgical furnace wall plate comprising a front face and ribs on the front face, wherein at least one mounting bar is fixed to the front face in the space between adjacent ribs, and wherein a plurality of augments are fixed to each mounting bar.

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