TWM661331U - Blast furnace body grouting mold - Google Patents

Abstract

The grouting mold of the blast furnace body of the invention comprises a bottom plate, a top cover and a grouting device. The top cover is locked on the bottom plate. A plurality of grouting holes are formed on the top cover. The grouting device comprises a chute and a grouting pipe. The chute is arranged between the bottom plate and the top cover and can move therebetween, wherein a plurality of unconnected openings are formed on the chute. When the chute is in one position, the openings are exposed from the grouting holes; when the chute is moved to another position, the openings are covered by the top cover. The grouting pipe is connected to and fixed to the chute. The grouting material can be injected into the chute from the grouting pipe, and overflow from the grouting holes when the openings are respectively opposite to the grouting holes. The grouting of the blast furnace body grouting mold of the invention can form a thick protective cover above the cooling plate, thereby extending the service life of the cooling plate.

Description

Blast furnace body grouting mold

This invention relates to a mold, in particular to a blast furnace body grouting mold.

The inner wall of the blast furnace is coated with refractory materials, and a cooling plate is embedded in it for cooling. After the blast furnace has been in operation for a period of time, the refractory materials in the furnace body are eroded by the raw materials and the high-temperature gas in the furnace, which will cause refractory peeling, cooling plate damage and water leakage. In the past, when such a situation occurred, two methods were used: opening the furnace iron shell to pour grout or spraying grout in the furnace to repair the refractory materials in the furnace and form a protective layer to protect the cooling plate from erosion.

The following is a brief description of the two learning repair methods.

1. Furnace wall grouting method:

During the operation of the blast furnace, damaged and leaking cooling plates will be replaced during the shutdown period. When the damaged cooling plate is pulled out, if it is found that the refractory materials inside the furnace wall have all fallen off or there are other needs, after the new cooling plate is replaced, holes will be drilled on the furnace wall above or around it and refractory materials will be poured to protect the cooling plate to prevent it from being worn by the furnace materials and affecting the life of the cooling plate.

The above method is to drill holes on the furnace body iron shell, install short pipes and ball valves by welding for subsequent grouting operations. After adding grouting holes, grouting materials can only be poured into the places as much as possible, and the position and appearance of the grouting materials cannot be fully controlled. In addition, considering the strength of the furnace body iron shell, the grouting holes must be set at a proper distance from the existing holes to prevent damage to the iron shell strength. If the grouting hole can no longer be filled with grouting material, it will be impossible to apply grouting around it, resulting in the inability to carry out repair work in that area. In the long run, the furnace body iron shell will be covered with grouting pipes, and whether the grouting pipes are available cannot be confirmed during operation.

2. Furnace wall spraying method:

The furnace wall spraying method is to hang the spraying equipment from the large manhole on the furnace top during the furnace shutdown period, and then lower it to the required position to spray the surface.

Before the furnace wall spraying is carried out, the material level in the furnace must be lowered to below the position to be sprayed. Therefore, the lowering of the material level during the furnace shutdown process, the configuration of the furnace shutdown raw materials and the installation of the spraying equipment must be carefully planned before implementation. It not only consumes a lot of manpower resources and a lot of time, but also consumes huge raw materials, equipment and construction costs.

Although furnace wall spraying can repair a large area, the sprayed material will rebound to the material surface and react to form a viscous substance that is difficult to melt and a slag with extremely poor fluidity. If special ingredients are not arranged when the furnace is shut down, it will cause difficulty in opening the furnace and even the furnace will cool down. In the past, there have been cases where too much rebounded material during spraying covered the material surface, causing poor air permeability, deterioration of furnace conditions, and long periods of no material intake. In order to restore the furnace condition to normal, several rapid air drops were required to force the material level to drop. The thermal shock and impact caused by the sudden drop in material level may cause the refractory sprayed on the furnace wall to fall off, resulting in a complete loss of the spraying operation.

In view of this, this invention proposes a grouting mold for the body of a blast furnace, which can be used for grouting when the cooling plate is replaced. There is no problem of grouting hole clogging and failure, and the grouting mold can also be reused.

To achieve the above-mentioned purpose, the blast furnace body grouting mold of the present invention comprises a bottom plate, a top cover and a grouting device. The top cover is locked on the bottom plate. A plurality of grouting holes are provided on the top cover. The grouting device comprises a chute and a grouting pipe. The chute is arranged between the bottom plate and the top cover and can move therebetween, wherein a plurality of unconnected openings are formed on the chute, and when the chute is in one position, the openings are exposed from the grouting holes, and when the chute is moved to another position, the openings are covered by the top cover. The grouting pipe is connected to and fixed on the chute, wherein the grouting material can be injected into the chute from the grouting pipe and overflow from the grouting holes when the openings are respectively opposite to the grouting holes.

The blast furnace body grouting mold according to this invention is inserted into the existing cooling plate mounting hole, and the grouting material is injected from the grouting mold for grouting, eliminating the step of destroying the furnace body to add grouting holes, and there is no need to hang the grouting machine into the furnace for grouting, ensuring that the strength of the iron shell is not damaged and avoiding high-risk and high-cost grouting operations.

In order to make the above and other purposes, features and advantages of this invention more obvious, the following will be explained in detail with the attached diagrams. In addition, in the description of this invention, the same components are represented by the same symbols, which are stated in advance.

The blast furnace body grouting mold of this invention includes a bottom plate, a top cover and a grouting device.

Please refer to FIG. 1 , which shows a bottom plate 100 included in the blast furnace body grouting mold of the present invention.

The bottom plate 100 is made of a steel plate, and its shape is close to a rectangle, but it is narrow at the front end and wide at the rear end, and its width gradually decreases from the rear to the front. A frame 110 is provided on the bottom plate 100, which is vertically welded to the periphery of the inner surface of the bottom plate 100, thereby enclosing a space on the inner surface of the bottom plate 100. The bottom plate 100 is also provided with a plurality of partitions 120, which are arranged in parallel and vertically welded to the inner surface of the bottom plate 100 and connected to the frame 110. The provision of the partitions 120 can increase the strength of the bottom plate 100 and divide the space enclosed by the frame 110 into a plurality of spaces. The frame 110 has a notch at the front end of the bottom plate 100, and each partition 120 also has a notch, and the notches are arranged in a straight line. The frame 110 also has a pair of hanging ears 130 welded to the front end of the bottom plate 100. In addition, a plurality of lock holes 102 are defined on the bottom plate 100 .

Please refer to FIG. 2 , which shows a top cover 200 included in the blast furnace body grouting mold of the present invention.

The top cover 200 is made of a steel plate, and its shape corresponds to the shape of the bottom plate 100. A plurality of lock posts 210 are provided on the top cover 200, which are vertically welded to the inner surface of the top cover 200 and are respectively provided at positions corresponding to the lock holes 102 on the bottom plate 100. A screw hole is provided at the top of each lock post 210 for bolts to be locked in. A plurality of grouting holes 204 are provided on the top cover 200, which are arranged in a straight line. In addition, a plurality of guide bars are also provided on the top cover 200, including a plurality of left guide bars 221 and a plurality of right guide bars 222. The left guide bar 221 is arranged in a straight line; the right guide bar 222 is arranged in a straight line. One of the left guide bars 221 is paired with one of the right guide bars 222. A guide groove is defined between the left guide bar 221 and the right guide bar 222.

Please refer to FIG. 3 , which shows a grouting device 300 included in the blast furnace body grouting mold of the present invention.

The grouting device 300 includes a chute 310 and a grouting pipe 320. The chute 310 is in a long strip shape and can be made of a steel U-shaped channel iron. A plurality of iron sheets 312 are welded to the top of the chute 310, which are not connected and partially cover the U-shaped channel iron, so that a plurality of unconnected openings 314 are formed at the top of the chute 310, and the portion of the chute 310 not covered by the iron sheets 312 is exposed. The position of the opening 314 at the top of the chute 310 corresponds to the grouting hole 204 on the top cover 200. The grouting pipe 320 is fixed to the chute 310, and its front end is welded to the rear end of the chute 310.

Please refer to FIG. 4 , according to the blast furnace body grouting mold of the present invention, the bottom plate 100 can be locked on the top cover 200. The locking method is to use a bolt to pass through the locking hole 102 on the bottom plate 100 and lock it into the locking column 210 on the top cover 200. The chute 310 of the grouting device 300 is arranged between the bottom plate 100 and the top cover 200, and is located in the guide groove between the left guide bar 221 and the right guide bar 222. The opening 314 of the chute 310 faces the grouting hole 204 on the top cover 200. The grouting pipe 320 of the grouting device 300 extends from the notch at the front end of the frame 110.

According to the blast furnace body grouting mold of the present invention, the chute 310 of the grouting device 300 can move in the space defined by the bottom plate 100 and the top cover 200. Restricted by the left guide bar 221 and the right guide bar 222, the grouting pipe 320 is pulled and pushed to make the chute 310 pass through the gap of the partition 120 and move longitudinally in the guide groove. When the chute 310 is in one position, its opening 314 will be exposed facing the grouting hole 204 on the top cover 200, as shown in FIG4; when the chute 310 moves to another position, the opening 314 faces the top cover 200 and the iron sheet 312 faces the grouting hole 204, as shown in FIG5.

According to the blast furnace body grouting mold of the present invention, the grouting material can be injected into the chute 310 through the grouting pipe 320. When the openings 314 of the chute 310 are respectively opposite to the grouting holes 204 on the top cover 200 as shown in FIG4, the grouting material will overflow from the grouting holes 204 to the outside of the entire mold; when the chute 310 moves to the point where its opening 314 is completely covered by the top cover 200 as shown in FIG5, the grouting material cannot overflow from the chute 310 to the outside of the mold.

According to the blast furnace body grouting mold of the present invention, the chute 310 can be inserted into the cooling plate mounting hole on the blast furnace body wall with the chute 310 in the position shown in FIG4. Afterwards, the grouting material is poured in from the grouting pipe 320, and the grouting material will overflow from the grouting hole 204 to the outside of the entire mold and fill the cooling plate mounting hole. After the grouting is completed, the grouting pipe 320 is pushed in to push the chute 310 to the position shown in FIG4 to cut off the grouting material. After the grouting material is hardened, the entire grouting mold is pulled out through the lifting lug 130 using a jack, and then a new cooling plate is inserted.

When the blast furnace body grouting mold of this creation is grouting, the grouting mold is inserted first after removing the damaged cooling plate during the replacement of the online cooling plate. After the grouting is completed, the grouting device in the grouting mold is pushed in to cut off the grouting material. When the grouting material hardens, the grouting mold can be easily pulled out and the new cooling plate can be inserted.

The grouting operation is performed using the blast furnace body grouting mold of this invention. The grouting material formed and hardened by this method is wrapped around the new cooling plate to isolate the raw materials and high-temperature gas in the blast furnace from direct erosion of the cooling plate. In addition, this grouting method does not require the addition of grouting holes for grouting, which will not damage the strength of the furnace body iron shell. Moreover, since grouting can be performed whenever the cooling plate is replaced, there is no problem of grouting hole clogging and failure, and the grouting mold can also be reused.

The blast furnace body grouting mold according to this invention is inserted into the existing cooling plate mounting hole, and the grouting material is injected from the grouting mold for grouting, eliminating the step of destroying the furnace body to add grouting holes, and there is no need to hang the grouting machine into the furnace for grouting, ensuring that the strength of the iron shell is not damaged and avoiding high-risk and high-cost grouting operations.

When the blast furnace body grouting mold of this invention is used for grouting, a thick protective cover can be formed above the cooling plate, extending the service life of the cooling plate and ensuring smooth blast furnace production.

Although the invention has been disclosed by the above examples, they are not intended to limit the invention. Anyone with ordinary knowledge in the technical field to which the invention belongs can make various changes and modifications without departing from the spirit and scope of the invention. Therefore, the scope of protection of the invention shall be subject to the scope of the patent application attached hereto.

100: bottom plate 102: lock hole 110: frame 120: partition 130: lifting ear 200: top cover 204: grouting hole 210: lock column 221: left guide bar 222: right guide bar 300: grouting device 310: chute 312: iron sheet 314: opening 320: grouting pipe

Figure 1 is a three-dimensional view of the bottom plate included in the blast furnace body grouting mold of the present invention. Figure 2 is a three-dimensional view of the top cover included in the blast furnace body grouting mold of the present invention. Figure 3 is a three-dimensional view of the grouting device included in the blast furnace body grouting mold of the present invention. Figure 4 is a three-dimensional view of the blast furnace body grouting mold of the present invention. Figure 5 is another three-dimensional view of the blast furnace body grouting mold of the present invention, in which the chute is moved to another position.

102: Keyhole

110:Border

120: Partition

130: hanging ear

204: Grouting hole

310: Chute

312:Iron sheet

314: Open your mouth

320: Grouting pipe

Claims (9)

A blast furnace body grouting mould comprises: a bottom plate; a top cover locked on the bottom plate, the top cover being provided with a plurality of grouting holes; and a grouting device comprising:     a chute, arranged between the bottom plate and the top cover and movable therebetween, wherein the chute is provided with a plurality of unconnected openings, when the chute is in one position, the openings are exposed from the grouting holes, when the chute is moved to another position, the openings are covered by the top cover; and     a grouting pipe, connected to and fixed on the chute, wherein grouting material can be injected into the chute from the grouting pipe, and overflow from the grouting holes when the openings are respectively opposite to the grouting holes. A blast furnace body grouting mold as described in claim 1, wherein the chute is made of U-shaped trough iron, and a plurality of unconnected iron sheets are welded to the top thereof. A blast furnace body grouting mold as described in claim 1, wherein the top cover is made of steel plate. A blast furnace body grouting mould as described in claim 1, wherein the bottom plate is made of steel plate. The blast furnace body grouting mold as described in claim 1 also includes: a plurality of left guide bars arranged in a straight line and fixed on the top cover; and a plurality of right guide bars arranged in a straight line and fixed on the top cover, wherein a guide groove is defined between the left guide bars and the right guide bars, and the slide groove is located in the guide groove and can move therein. The blast furnace body grouting mold as described in claim 1 also includes: a side frame, which is arranged between the top cover and the bottom plate and vertically welded to the periphery of the bottom plate to enclose a space on the bottom plate, and the side frame is provided with a notch, and the grouting pipe extends from the notch on the side frame. The blast furnace body grouting mold as described in claim 6 also includes: a pair of lifting ears welded to the side frame. The blast furnace body grouting mold as described in claim 1 also includes: a plurality of partition plates, which are arranged in parallel between the top cover and the bottom plate, and vertically welded to the bottom plate. As described in claim 1, a blast furnace body grouting mold is provided, wherein a plurality of lock columns are welded on the top cover, each of which has a screw hole on its top, and a plurality of lock holes are provided on the bottom plate, respectively corresponding to the screw holes.

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