CN212222865U

CN212222865U - Dry quenching furnace inclined flue pillar brick micropore anchor pulling repairing structure

Info

Publication number: CN212222865U
Application number: CN202020615060.5U
Authority: CN
Inventors: 张华�; 余毅; 刘通
Original assignee: Wuhan Jingding Technology Co ltd
Current assignee: Wuhan Jingding Technology Co ltd
Priority date: 2020-04-22
Filing date: 2020-04-22
Publication date: 2020-12-25
Anticipated expiration: 2030-04-22

Abstract

The utility model provides a dry quenching furnace chute pillar brick micropore anchor pulling repairing structure. The micropore anchor pulling repairing structure of the chute pillar brick of the dry quenching furnace comprises a cracked chute pillar brick, and is characterized in that: the broken surface of the chute pillar brick is provided with a pull anchor structure and a mending material pouring layer, the inner surface of the mending material pouring layer is tightly contacted with the broken surface of the chute pillar brick, and the outer surface of the mending material pouring layer is flush with the surface of the original chute pillar masonry; the anchor pulling structure comprises a minimally invasive hole drilled in the chute pillar brick, an anchoring bolt implanted into the minimally invasive hole and an anchoring part welded at the end part of the anchoring bolt, and the anchoring part is arranged in the patching material pouring layer. The utility model discloses can guarantee the normal operating of dry coke quenching system, slow down the damage speed of putting out stove chute pillar firebrick brickwork futilely, prolong the life who puts out the stove futilely.

Description

Dry quenching furnace inclined flue pillar brick micropore anchor pulling repairing structure

Technical Field

The utility model belongs to the kiln brickwork field of repairing specifically is a put out stove chute pillar brick micropore anchor pulling and repairing structure futilely.

Background

With the rapid development of the steel industry, the demand of coke is rapidly increased due to the expansion of the steel production scale, and meanwhile, with the development of the society, the requirements on environmental protection and energy are higher and higher, and more steel plants in China adopt dry quenching devices. The dry quenching furnace is a main part of the dry quenching device and mainly takes charge of the storage and cooling tasks of red coke, the red coke enters from the upper part of the dry quenching device and is discharged from the lower part of the dry quenching device through a pre-storage chamber to a cooling chamber, the cooled coke is discharged from the lower part of the dry quenching furnace, corresponding cooling gas (the main component of which is inert gas such as circulating nitrogen gas) is blown from the lower part of the dry quenching furnace, and after the cooling section is changed into hot gas through heat exchange of the hot coke contacted with the cooling section, the hot gas is converged into two sides of an annular flue at the upper part from an inclined air duct in the middle of the furnace wall of the dry quenching furnace.

The dry quenching furnace masonry belongs to a shaft kiln type structure, as shown in figure 3, the middle lower part is a barrel-shaped vertical masonry in a positive pressure state, a furnace body can be divided into a pre-storage chamber, an annular air passage, a chute area and a cooling chamber from top to bottom, and brick supporting plates are adopted between the chute area and the cooling chamber, and between the pre-storage chamber and the annular air passage, the refractory materials of the dry quenching furnace lining are separated. The structural form of the chute area of the dry quenching furnace is an annular closed structure with vaults and flue and chute support bricks which are uniformly arranged at intervals, the flue adopts a form that brick masonry is built outwards along the inclination of a furnace shell steel structure so as to change the depth of the air flue, the chute support pillars adopt a form that the brick masonry is overhung layer by layer into the furnace so as to support the load of the upper brick masonry, and the connection between the end parts of the chute support pillars adopts an arch structure to be closed into an annular shape. The working condition environment of the bracket brick part in the chute area is characterized in that the temperature is frequently fluctuated, hot air flow and red coke powder dust are violently washed, and cracks, fractures, damages, spalling and the like are generated within one or two years after new construction or overhaul operation, so that the dry quenching furnace is forced to stop production and overhaul.

Disclosure of Invention

The utility model discloses a solve above-mentioned technical problem and provide a dry quenching stove chute pillar brick micropore anchor pulling repair structure, this repair structure can restore dry quenching stove chute pillar brick fast, makes the normal operating of dry quenching system, and repair structure can slow down the damage speed of dry quenching stove chute pillar brick brickwork, prolongs its life.

In order to achieve the aim, the utility model provides a put out stove chute pillar brick micropore anchor pulling and repairing structure futilely, including cracked chute pillar brick, its characterized in that: the broken surface of the chute pillar brick is provided with a pull anchor structure and a mending material pouring layer, the inner surface of the mending material pouring layer is tightly contacted with the broken surface of the chute pillar brick, and the outer surface of the mending material pouring layer is flush with the surface of the original chute pillar masonry; the anchor pulling structure comprises a minimally invasive hole drilled in the chute pillar brick, an anchoring bolt implanted into the minimally invasive hole and an anchoring part welded at the end part of the anchoring bolt, and the anchoring part is arranged in the patching material pouring layer.

The utility model discloses further technical scheme does: the anchor pulling structure further comprises a plurality of anchor ribs which are arranged in the repairing material pouring layer in a staggered mode, the anchor ribs are connected to the anchoring part in a staggered mode, and the cross points of the two anchor ribs are fixedly connected, so that an anchor grid structure is formed.

The utility model discloses further technical scheme does: the patching material pouring layer is made of mullite-silicon carbide refractory castable.

The utility model discloses better technical scheme does: a minimally invasive hole is drilled in each broken chute pillar brick, and the minimally invasive hole is drilled in the center of the broken surface of the chute pillar brick.

The utility model discloses better technical scheme does: the minimally invasive hole is formed by minimally invasive punching on the brick body by using a drilling machine, the depth of the hole body is 100-120 mm, and the diameter of the hole body is 10-14 mm.

The utility model discloses better technical scheme does: the anchoring part is a Y-shaped anchoring part, the Y-shaped head of the anchoring part is arranged in the patching material pouring layer on the outer side of the anchoring rib, the vertical end of the Y-shaped head is welded with the end part of the anchoring bolt, the anchoring ribs are welded to the vertical part of the anchoring part in a staggered mode, and the distance between the top of the Y-shaped head of the anchoring part and the surface of the original chute pillar masonry is 50-60 mm.

The utility model discloses better technical scheme does: the anchoring piece and the anchoring rib are made of stainless steel materials, and the connecting part of the anchoring rib and the anchoring piece and the cross part between the anchoring ribs are welded.

The utility model discloses a drilling at chute pillar brick spalling face, implant anchor bolt again and in anchor bolt tip welding anchor assembly in order to form and draw the anchor structure, then according to the design size formwork of chute pillar, pour the special repair pouring material of pouring at last and reach and repair brick body defect department. The utility model adopts the mullite-silicon carbide refractory castable, requires the raw materials to have high purity, good activity and good particle shape in macroscopic view, so as to ensure that the new lining material has good microstructure on one hand, uniform crystallization, good crystal phase and grain shape, can form a net structure and can be well bonded with the parent metal on the other hand after the casting forming oven; the minimally invasive drilling construction technology can ensure the repairing quality of the chute pillar brick; the whole repairing structure can ensure the normal operation of the coke dry quenching system, slow down the damage speed of the refractory brick masonry of the chute strut of the coke dry quenching furnace and prolong the service life of the coke dry quenching furnace.

Drawings

FIG. 1 is a cross-sectional view of a repair structure of the present invention;

fig. 2 is a plan view of a repair structure of the present invention;

FIG. 3 is a schematic view of the overall structure of the dry quenching furnace of the present invention;

fig. 4 is a schematic diagram of the formwork erection during the pouring of the repair material.

In the figure: the method comprises the following steps of 1, chute pillar bricks, 2, a patching material pouring layer, 3, minimally invasive holes, 4, anchoring bolts, 5, anchoring pieces, 6, anchoring ribs, 7, the surface of an original chute pillar masonry, 8, a chute area of a dry quenching furnace and 9, and a template.

Detailed Description

The present invention will be further explained with reference to the drawings and examples. Fig. 1 to 2 are drawings of the embodiment, which are drawn in a simplified manner and are only used for the purpose of clearly and concisely illustrating the embodiment of the present invention. The following detailed description of the embodiments of the present invention is presented in the drawings and is not intended to limit the scope of the invention as claimed. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

The microporous pull anchor repairing structure for the chute pillar brick of the dry quenching furnace comprises a cracked chute pillar brick 1, wherein a pull anchor structure and a repairing material pouring layer 2 are arranged on the cracked surface of the chute pillar brick 1, the inner surface of the repairing material pouring layer 2 is in close contact with the cracked surface of the chute pillar brick 1, and the outer surface of the repairing material pouring layer 2 is flush with the surface 7 of the original chute pillar brick; the anchor pulling structure comprises a minimally invasive hole 3 drilled in the chute pillar brick 1, an anchoring bolt 4 implanted into the minimally invasive hole 3, an anchoring part 5 welded at the end part of the anchoring bolt 4 and a plurality of stainless steel anchoring ribs 6 which are arranged in the patching material pouring layer 2 in a staggered mode. A minimally invasive hole 3 is drilled in each broken chute pillar brick 1, an anchoring bolt 4 is implanted, the minimally invasive hole 3 is drilled in the center of the broken surface of the chute pillar brick 1, a plurality of anchoring steel bars 6 are welded to anchoring pieces 5 in a staggered mode, and the intersection points of the two anchoring steel bars 6 are fixedly welded, so that an anchoring grid structure is constructed. The anchoring piece 5 is a Y-shaped anchoring piece, the Y-shaped head of the anchoring piece 5 is arranged in the repairing material pouring layer 2 on the outer side of the anchoring rib 6, the vertical end of the Y-shaped head is welded with the end part of the anchoring bolt 4, and the distance between the top of the Y-shaped head of the anchoring piece 5 and the surface 7 of the original chute strut masonry is 50-60 mm.

It is right to combine specific example below the utility model discloses a build the process by laying bricks or stones further explain, this example restores to the dry quenching stove chute district of certain steel mill, the structure of this dry quenching stove is as shown in fig. 3, dry quenching stove brickwork belongs to shaft kiln formula structure, furnace body top-down can be divided into the room of prestoring, chute district and cooling chamber, the structural style in chute district is that flue and chute pillar interval are evenly arranged, the annular enclosed construction who contains the vault, the flue adopts the form that the brick brickwork outwards built by laying bricks or stones along stove outer covering steel construction inclination in order to change the air flue degree of depth, the form that the chute pillar adopted the brick brickwork to encorbelment in step by step to stove is with bearing upper portion brickwork loading, the hook. According to different technological requirements, masonry structures of the chute area are generally divided into a single chute structure and a double chute structure, and the chute area of the dry quenching furnace is very complicated in structure and is the worst place of the working condition environment in the dry quenching furnace, so that the part is also the most easily damaged part in the dry quenching furnace. The damage mechanism of the bracket bricks in the chute area not only has factors in the aspects of production process operation, but also has factors in the aspects of selection of refractory materials, building construction quality of the refractory materials and the like. In order to ensure the normal operation of the coke dry quenching system, the damage speed of the refractory brick masonry of the chute strut of the coke dry quenching furnace is reduced, the service life of the coke dry quenching furnace is prolonged, and the coke dry quenching furnace is repaired aiming at the damaged surface of the coke dry quenching furnace.

The patching material pouring material in the embodiment adopts mullite-silicon carbide refractory castable, and the physical and chemical indexes of the castable are shown in table 1;

TABLE 1 mullite-silicon carbide refractory castable

The specific repairing process is as follows:

(1) dismantling each layer of loose refractory bricks and the stripped parts of the casting materials of the damaged support bricks on the upper part of the chute under the conditions of not damaging the original refractory material structure and not influencing the original stable structure of the furnace body; before dismantling, checking and confirming the state of the brick or the pouring material block, dismantling the loosened brick or the pouring material block by block, cleaning the loosened refractory brick on the surface of the chute strut, dismantling one block when dismantling, not allowing a pneumatic pick to directly dismantle, and dismantling by using a drilling machine in a matching way; and cleaning the pouring surface of the chute support post by using compressed air after the chute support post is dismantled, and blowing the compressed air for at least three times from top to bottom to ensure that floating dust is basically not seen on the surface of the brick, and properly spraying some atomized water for preventing dust from flying.

(2) Repairing the inclined flue supports one by one, namely pouring a casting material on the support brick formwork of the support on the surface of the bracket; firstly, a minimally invasive drilling construction technology is adopted in the middle of each layer of refractory brick position of a support brick on the upper part of a damaged chute, drilling is slow, a minimally invasive hole 3 with the length of 120mm and the diameter phi 12mm is drilled, then a phi 10mm expansion bolt 4 is driven in, a phi 10mm round steel manufactured Y-shaped anchoring part 5 is welded on the expansion bolt 4, the length of the anchoring part 5 is suitable for the distance between the top of the anchoring part and a working surface to be about 50 mm-60 mm, the expansion bolt and the anchoring part 5 are made of Cr25Ni20(310S) heat-resistant stainless steel, and the anchoring part is firmly installed and welded; then laying anchoring ribs 6, wherein the anchoring ribs 6 are made of stainless steel round steel, are connected to the anchoring parts 5 in a staggered mode according to actual conditions, and are reinforced through spot welding at cross points, so that an anchoring grid is formed; after the anchoring part 5 and the anchoring rib 6 are welded, welding slag and a welding rod coating are removed, and the surface of the anchoring part 5 is coated with asphalt paint or wound with a black tape for 2-3 times.

(3) After the expansion bolt 4, the anchoring piece 5 and the anchoring rib 6 are installed, floating ash on the brick surface is removed, the brick surface at the pouring position is treated by adopting a high-temperature adhesive, and a waterproof isolation measure with the original refractory brick is made.

(4) Supporting a template: adopting a wood template with the thickness of 20mm to manufacture a pillar shaping template, wherein the shaping template must be consistent with the size of the original refractory brick masonry, and the shaping template is supported by two adjacent pillars when being installed, as shown in fig. 4 specifically; after the templates are erected, pouring mullite-silicon carbide refractory castable can be poured, pouring construction is carried out according to brick layer segmentation during pouring, segmentation operation is performed by taking 2-3 layers of bricks as boundaries, the first section of the upper pillar brick is poured, petroleum asphalt paper with the thickness of 1mm is laid after pouring is completed, then the castable of the second section of the upper pillar brick is poured, and the like, wherein the pouring interval is 0.5 hour each time. And the template can be disassembled after the casting material is cured for 24 hours.

The utility model discloses according to the damage situation of putting out the chute branch way pillar brick futilely, select more suitable refractory material and take the wicresoft drilling construction technique to repair, ensured the quality that puts out the transformation of stove bracket futilely, can guarantee the normal operating of dry quenching system after the repair, slowed down the damage speed of putting out the stove chute branch way firebrick brickwork futilely, prolonged the life who puts out the stove futilely.

To sum up, for the utility model discloses an embodiment of listing, nevertheless the utility model discloses not only be limited to above-mentioned embodiment, as long as reach with any same or similar means the technical effect of the utility model, all should belong to the scope of the protection of the utility model.

Claims

1. The utility model provides a dry quenching stove chute pillar brick micropore draws anchor to repair structure, includes cracked chute pillar brick (1), its characterized in that: a pulling anchor structure and a mending material pouring layer (2) are arranged on the fracture surface of the chute pillar brick (1), the inner surface of the mending material pouring layer (2) is tightly contacted with the fracture surface of the chute pillar brick (1), and the outer surface of the mending material pouring layer is flush with the surface (7) of the original chute pillar masonry; the anchor pulling structure comprises a minimally invasive hole (3) drilled in the chute pillar brick (1), an anchoring bolt (4) implanted into the minimally invasive hole (3) and an anchoring piece (5) welded at the end part of the anchoring bolt (4), wherein the anchoring piece (5) is arranged in the repairing material pouring layer (2).

2. The dry quenching furnace chute pillar brick micropore anchor pulling repairing structure according to claim 1, wherein: the anchor pulling structure further comprises a plurality of anchor ribs (6) which are arranged in the repairing material pouring layer (2) in a staggered mode, the anchor ribs (6) are connected to the anchoring piece (5) in a staggered mode, and cross points of the two anchor ribs (6) are fixedly connected, so that an anchoring grid structure is formed.

3. The dry quenching furnace chute support brick micropore anchor pulling repairing structure according to claim 1 or 2, characterized in that: the patching material pouring layer (2) is made of mullite-silicon carbide refractory castable.

4. The dry quenching furnace chute support brick micropore anchor pulling repairing structure according to claim 1 or 2, characterized in that: a minimally invasive hole (3) is drilled in each broken chute support brick (1), and the minimally invasive hole (3) is drilled in the center of the broken surface of the chute support brick (1).

5. The dry quenching furnace chute support brick micropore anchor pulling repairing structure according to claim 1 or 2, characterized in that: the minimally invasive hole (3) is formed by minimally invasive punching on a brick body by using a drilling machine, the depth of the hole body is 100-120 mm, and the diameter of the hole body is 10-14 mm.

6. The dry quenching furnace chute pillar brick micropore anchor pulling repairing structure according to claim 2, wherein: the anchoring piece (5) is a Y-shaped anchoring piece, the Y-shaped head of the anchoring piece (5) is arranged in the repairing material pouring layer (2) on the outer side of the anchoring rib (6), the vertical end of the Y-shaped head is welded with the end part of the anchoring bolt (4), the anchoring ribs (6) are welded to the vertical part of the anchoring piece (5) in a staggered mode, and the distance between the top of the Y-shaped head of the anchoring piece (5) and the surface (7) of the original chute pillar masonry is 50-60 mm.

7. The dry quenching furnace chute pillar brick micropore anchor pulling repairing structure according to claim 2, wherein: the anchoring piece (5) and the anchoring rib (6) are made of stainless steel materials, and the connecting part of the anchoring rib (6) and the anchoring piece (5) and the cross part between the anchoring ribs (6) are welded.