CN216712133U

CN216712133U - Tool for improving iron notch plugging efficiency of blast furnace

Info

Publication number: CN216712133U
Application number: CN202122810168.7U
Authority: CN
Inventors: 谢吉祥; 陈小平; 廖运友; 聂志洪; 孙欢
Original assignee: Yancheng Lianxin Iron and Steel Co Ltd
Current assignee: Yancheng Lianxin Iron and Steel Co Ltd
Priority date: 2021-11-17
Filing date: 2021-11-17
Publication date: 2022-06-10
Anticipated expiration: 2031-11-17

Abstract

The utility model relates to the technical field of blast furnace smelting, in particular to a tool for improving the taphole plugging efficiency of a blast furnace, which comprises the following components: the gun cap protective sleeve comprises a steel pipe and a steel machined part, the steel pipe and the steel machined part are fixedly connected in a double-sided welding mode, and a welding point exists at the welding position of the steel pipe and the steel machined part; the tool for improving the blast furnace taphole plugging efficiency can realize quick and safe taphole plugging under the condition of no need of blast furnace damping down or slow wind by increasing the gun cap protective sleeve or the taphole mud sleeve protective sleeve when the gun cap of the mud gun is burnt or the taphole mud sleeve is damaged in the blast furnace taphole plugging process, thereby reducing the blast furnace damping down rate or the slow wind rate and reducing the occurrence of safety accidents.

Description

Tool for improving iron notch plugging efficiency of blast furnace

Technical Field

The utility model relates to the technical field of blast furnace smelting, in particular to a tool for improving the plugging efficiency of a blast furnace taphole.

Background

With the development of high-efficiency smelting technology of blast furnaces, the control of reducing the damping-down rate and the slow-draft rate of the blast furnaces in each implementation process is still one of the key measures. Although the planned maintenance time and frequency of the blast furnace are greatly improved compared with the prior art, the control of unplanned damping down and slow wind becomes the key for reducing the damping down rate and the slow wind rate of the blast furnace; in the normal tapping process of the blast furnace, the tap hole can not be normally blocked due to a plurality of reasons, the gun head of the hydraulic mud gun is easy to burn out, and the like, the wind pressure of the blast furnace is generally required to be reduced, even the blowing down is required to be blocked, so that the unplanned slow wind rate or blowing down rate of the blast furnace is increased, and the normal production of the blast furnace is restricted; therefore, the necessity of improving the taphole plugging efficiency to reduce the unplanned damping down rate or the slow air rate of the blast furnace is the high-efficiency smelting development of the blast furnace.

At present, in the normal production process of a blast furnace, the taphole plugging of the blast furnace adopts a manual plugging or automatic plugging mode, and the mud gun filled with anhydrous stemming needs to be baked in the tapping process to prevent the stemming from being too hard to cause large resistance and cannot be used for mud beating; and hard slag on two sides of the taphole is cleaned before the taphole is plugged, so that the mud gun is prevented from deviating and leaking iron. Whether the taphole mud sleeve is damaged or not is checked before tapping, and the method is also an important measure for improving the taphole plugging efficiency.

The prior technical scheme can timely bake stemming and clean hard dry slag on two sides of an iron notch before plugging the notch in operation, but still causes the conditions of burning of a gun cap and the like in the process of plugging the notch, so that the notch can not be plugged or plugged in a blast furnace. In addition, equipment faults (such as loose pull rod) of the hydraulic mud gun cause the mud gun to deviate, and the gun cap is easily burnt out during port plugging so as not to plug the port; meanwhile, the mud sleeve is damaged in the tapping process, and once the mud sleeve of the tap hole is damaged, the tap hole is easy to block and cannot be tapped. In a word, when the blast furnace taphole is not blocked under any condition, the blast furnace is slowly blown or stopped, the taphole blocking efficiency is reduced, the blast furnace slow blowing rate or the stopped blowing rate is increased, and economic loss and safety accidents are caused.

In view of the above problems in the prior art, the present invention is directed to a tool for improving the taphole plugging efficiency of a blast furnace.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a tool for improving the taphole plugging efficiency of a blast furnace, when a gun cap of a mud gun is burnt or a taphole mud sleeve is damaged in the taphole plugging process, the rapid and safe taphole plugging is realized without damping down or slow wind of the blast furnace by adding a gun cap protective sleeve or a taphole mud sleeve protective sleeve, so that the damping down rate or the slow wind rate of the blast furnace is reduced, and the occurrence of safety accidents is reduced.

In order to achieve the purpose, the utility model provides the following technical scheme:

an apparatus for improving the efficiency of taphole plugging of a blast furnace, the apparatus comprising:

the gun cap protective sleeve comprises a steel pipe and a steel machined part; the model of the steel pipe is Q235 steel pipe, and the model of the steel machined part is 20# steel machined part; the steel pipe and the steel workpiece are fixedly connected by adopting double-sided welding, and a welding point is arranged at the welding position of the steel pipe and the steel workpiece.

An apparatus for improving the efficiency of plugging a blast furnace taphole, the apparatus comprising:

the iron notch mud sleeve protective sleeve comprises an asbestos plate and a cloth bag, wherein the asbestos plate is a high-temperature-resistant asbestos plate and is made of natural fibrous silicate, and the high temperature of the asbestos plate can be generally resistant to more than 1000 ℃; the cloth bag is a high-temperature cloth bag, and the manufacturing material of the cloth bag is a fluorine Meis needled felt; the cloth bag and the asbestos board are fixedly connected by iron wires, and a connector is arranged at the connecting position of the cloth bag and the asbestos board.

As a further scheme of the utility model: the outer diameter of the steel pipe is phi 150 mm, the wall thickness is sigma 4 mm, and the outer diameter of the steel machined part is phi 250 mm and the inner diameter is phi 154 mm.

As a further scheme of the utility model: the outer diameter phi 130 mm, the inner diameter phi 254 mm and the thickness phi 15 mm of the asbestos plate; the diameter of the front end of the cloth bag is phi 260 mm, the diameter of the rear end of the cloth bag is 320 mm, and the thickness is sigma 3 mm. Compared with the prior art, the utility model has the beneficial effects that:

the tool for improving the blocking efficiency of the blast furnace taphole has the following advantages:

firstly, direct economic benefits are achieved, after the technology is implemented, the damping down or slow wind of the blast furnace caused by the fact that a taphole is not blocked is reduced, the annual damping down rate of the blast furnace is reduced by 0.1%, the slow wind rate is reduced by 0.15%, and the yield of molten iron is increased by more than 6000 tons; calculating according to the current molten iron profit, and creating 480 ten thousand yuan of benefit each year;

secondly, safety benefits are achieved, according to the prior art, if a blast furnace is blocked at an iron notch, in order to reduce loss, a burnt hydraulic clay gun cap is usually treated in the splashing process of the blast furnace, the gun cap and a gun neck are directly connected by bolts or pins and are not easy to replace, and in addition, safety accidents such as personnel scalding are easily caused by treatment in a high-temperature state, and the safety accidents caused by personnel scalding can be avoided after the technical measures are used;

thirdly, the gun cap protective sleeve and the taphole clay sleeve protective sleeve are simple to manufacture, the materials are easy to purchase, the cost is low, and the popularization and the use are facilitated; the gun cap protective sleeve and the taphole mud sleeve are simple to operate, and the common stokehole workers can operate independently.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention.

FIG. 1 is a side view of an apparatus for improving the taphole plugging efficiency of a blast furnace according to example 1 of the present invention.

Fig. 2 is a plan view of an apparatus for improving the efficiency of plugging a taphole of a blast furnace according to example 1 of the present invention.

FIG. 3 is a side view of an apparatus for improving the taphole plugging efficiency of a blast furnace according to example 2 of the present invention.

Fig. 4 is a plan view of an apparatus for improving the efficiency of plugging a blast furnace taphole according to example 2 of the present invention.

FIG. 5 is a schematic view showing the operation principle of the taphole plugging of the blast furnace.

In the figure: 1-steel pipe, 2-welding point, 3-steel workpiece, 4-asbestos plate, 5-cloth bag, 6-connecting port, 7-furnace shell, 8-hydraulic clay gun body, 9-gun cap, 10-iron notch protection plate, 11-casting material, 12-cooling wall, 13-carbon brick, 14-ceramic cup and 15-clay bag.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.

Example 1

Referring to fig. 1 and 2, in embodiment 1 of the present invention, an apparatus for improving the taphole plugging efficiency of a blast furnace includes:

the gun cap protective sleeve comprises a steel pipe 1 and a steel machined part 3; the model of the steel pipe 1 is Q235 steel pipe, and the model of the steel machined part 3 is 20# steel machined part; the steel pipe 1 and the steel workpiece 3 are fixedly connected by double-sided welding, and a welding point 2 is arranged at the welding position of the steel pipe 1 and the steel workpiece 3; the steel pipe 1 has an outer diameter of Φ 150 mm and a wall thickness of δ 4 mm, and the steel workpiece 3 has an outer diameter of Φ 250 mm and an inner diameter of Φ 154 mm.

The blast furnace cap protective sleeve is characterized in that under the condition that a blast furnace cap part or a shot part is burnt and damaged in the process of blocking a blast furnace taphole, the blast furnace cap protective sleeve is quickly added on the basis of the original blast furnace cap, and the taphole is blocked under the condition that the blast furnace is not required to be subjected to wind reduction or damping down;

when the gun cap protective sleeve is used for improving the blast furnace taphole plugging efficiency, the gun cap protective sleeve is inserted into a gun nozzle through a steel pipe 1 to be aligned and calibrated, and a steel machined part 3 is welded and connected with an original gun cap by a welding machine; after the completion, plugging is carried out, the original gun cap is replaced before the opening of the next furnace, and the gun cap protective sleeve can not be reused in principle;

example 2

Referring to fig. 3 and 4, in embodiment 2 of the present invention, an apparatus for improving the efficiency of plugging a blast furnace taphole includes:

the taphole mud sleeve protective sleeve comprises an asbestos plate 4 and a cloth bag 5, wherein the asbestos plate 4 is a high-temperature-resistant asbestos plate and is made of natural fibrous silicate, and the high temperature of the asbestos plate can be generally resistant to more than 1000 ℃; the cloth bag 5 is a high-temperature cloth bag, and the cloth bag 5 is made of a fluorine Meis needled felt; the cloth bag 5 and the asbestos plate 4 are fixedly connected by iron wires, and a connecting port 6 is arranged at the connecting position of the cloth bag 5 and the asbestos plate 4; the outer diameter phi 130 mm, the inner diameter phi 254 mm and the thickness phi 15 mm of the asbestos plate 4; the diameter of the front end of the cloth bag 5 is phi 260 mm, the diameter of the rear end is 320 mm, and the thickness is sigma 3 mm;

the iron wire for the taphole mud sleeve protective sleeve is fixed on the hydraulic mud gun head, and the time delay of the taphole mud sleeve protective sleeve after the taphole mud is plugged is about 10-15 min longer than that of a normal taphole plug; after the blast furnace mud gun is removed, the taphole mud sleeve protective sleeve and the stemming are bonded on the taphole channel, and a refractory material is reused to maintain a damaged taphole before the next taphole opening, so that the taphole mud sleeve protective sleeve can not be reused for the second time in principle;

the working principle of the embodiment of the utility model is as follows:

referring to fig. 5, a schematic diagram of a blast furnace taphole is shown, wherein a taphole protection plate 10 is arranged on one side of a furnace shell 7, a taphole is arranged on the taphole protection plate 10, a gun cap 9 is arranged inside the taphole, and one end of the gun cap 9 is connected with a hydraulic clay gun body 8; the lower end of the furnace shell 7 is sequentially provided with a pouring material 11, a cooling wall 12, carbon bricks 13, a ceramic cup 14 and a mud bag 15;

the utility model aims to provide a method for rapidly and safely plugging a taphole without damping down or slowing down a blast furnace by adding a gun cap protective sleeve or a taphole mud sleeve protective sleeve when a gun cap 12 of a mud gun is burnt or a taphole mud sleeve is damaged in the taphole plugging process, thereby reducing the damping down rate or the slowing down rate of the blast furnace and reducing the occurrence of safety accidents.

In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. The utility model provides an apparatus for improving blast furnace iron notch choking efficiency which characterized in that, the apparatus for improving blast furnace iron notch choking efficiency includes: the gun cap protective sleeve comprises a steel pipe (1) and a steel workpiece (3); the steel pipe (1) and the steel workpiece (3) are fixedly connected by double-sided welding, and a welding point (2) is arranged at the welding position of the steel pipe (1) and the steel workpiece (3).

2. The tool for improving the taphole plugging efficiency of the blast furnace according to claim 1, wherein: the steel pipe (1) has an outer diameter of phi 150 mm and a wall thickness of sigma 4 mm, and the steel machined part (3) has an outer diameter of phi 250 mm and an inner diameter of phi 154 mm.

3. The utility model provides an apparatus for improving blast furnace iron notch choking efficiency which characterized in that, the apparatus for improving blast furnace iron notch choking efficiency includes: the iron notch mud sleeve protective sleeve comprises an asbestos plate (4) and a cloth bag (5); the cloth bag (5) and the asbestos board (4) are fixedly connected by iron wires, and a connecting port (6) is arranged at the connecting position of the cloth bag (5) and the asbestos board (4).

4. The tool for improving the taphole plugging efficiency of the blast furnace according to claim 3, wherein: the outer diameter phi 130 mm, the inner diameter phi 254 mm and the thickness Be 15 mm of the asbestos plate (4); the diameter of the front end of the cloth bag (5) is phi 260 mm, the diameter of the rear end is 320 mm, and the thickness is Be 3 mm.