Temporary plugging device for blast furnace

By designing a temporary plugging device for blast furnaces, refractory castable materials are used to seal the taphole and release expanding gas, solving the plugging problem caused by mud gun malfunctions, achieving safe and reliable temporary plugging, and ensuring the continuity and safety of blast furnace production.

CN222331948UActive Publication Date: 2025-01-10HEBEI IRON AND STEEL
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Patent Information

Application Number
CN202421066657.3
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-05-16
Publication Date
2025-01-10
Estimated Expiration
2034-05-16

AI Technical Summary

Technical Problem

During the blast furnace ironmaking process, mud gun malfunctions or inadequate maintenance can prevent the taphole from being blocked, affecting production progress and posing safety hazards.

Method used

Design a temporary plugging device for blast furnace, comprising a protective shell, a connecting sleeve, a casting vent pipe and a drill rod, which uses refractory castable material to seal the taphole and discharges expanding gas through the casting vent pipe to prevent explosion.

Benefits of technology

It achieves safe and reliable temporary sealing when the mud gun cannot block the iron vent, avoiding oxygen shutdown and ventilation reduction measures, and ensuring the continuity and safety of production.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to a temporary plugging device for a blast furnace, and belongs to the technical field of blast furnace ironmaking equipment in the metallurgical industry. According to the technical scheme, the device comprises a protective shell (1), a connecting sleeve (2), a pouring exhaust pipe (3), filler (4) and a drill rod (5), the protective shell (1) is a hollow cone, the filler (4) is arranged in the protective shell (1), the connecting sleeve (2) and the pouring exhaust pipe (3) are fixed to the bottom face of the cone of the protective shell (1), and the drill rod (5) is connected with the connecting sleeve (2); when an iron notch is plugged, the device is installed on a tapping machine, the vertex of the cone of the protective shell is aligned with the iron notch for plugging, in the process, the protective shell is melted, the refractory casting material plays a role in plugging the notch, gas generated in the protective shell expands and is exhausted through the casting exhaust pipe, and expansion explosion is prevented. The temporary plugging device has the beneficial effects that the temporary plugging can be realized under the condition that an iron notch cannot be plugged by a clay gun, and the temporary plugging device is safe and reliable.
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Description

Technical Field

[0001] The utility model relates to a temporary plugging device for a blast furnace, belonging to the technical field of blast furnace ironmaking equipment in the metallurgical industry. Background Art

[0002] The iron mouth of the blast furnace is responsible for discharging slag and iron water. When the slag and iron are completely discharged, the iron mouth needs to be blocked with a mud gun to enter the next iron-discharging cycle. However, if the mud gun fails or the iron mouth is not properly maintained during the production process, the mud gun will not be able to block the iron mouth. Therefore, the blast furnace can only be forced to take measures such as stopping oxygen and reducing wind to control the pressure in the furnace and the iron mouth splashing phenomenon, in order to gain time to deal with the mud gun and the iron mouth, which seriously affects the normal smelting progress of the blast furnace. At the same time, there are also major safety hazards in this process. Utility Model Content

[0003] The utility model aims to provide a temporary plugging device for a blast furnace, which can realize temporary plugging when a mud gun cannot plug the iron mouth, and solve the problems existing in the background technology.

[0004] The technical solution of the utility model is:

[0005] A temporary plugging device for a blast furnace comprises a protective shell, a connecting sleeve, a cast exhaust pipe, a filler and a drill rod. The protective shell is a hollow cone with a filler inside. The connecting sleeve and the cast exhaust pipe are respectively fixed on the bottom surface of the protective shell cone, and the drill rod is connected to the connecting sleeve.

[0006] The central axis of the connecting sleeve coincides with the central axis of the hollow cone protective shell.

[0007] The connecting sleeve is provided with an internal thread, and the drill rod is threadedly connected with the connecting sleeve.

[0008] The cast exhaust pipe is communicated with the interior of the protective shell.

[0009] The size of the protective shell matches the iron mouth of the blast furnace.

[0010] The filler inside the protective shell is refractory castable.

[0011] When the utility model is used to block the iron mouth, the device is installed on the opening machine so that the cone vertex of the protective shell is aligned with the iron mouth for blocking. During this process, the protective shell melts, the refractory casting material plays a role in blocking the mouth, and the gas generated inside the protective shell expands and is discharged through the casting exhaust pipe to prevent expansion and explosion.

[0012] The beneficial effects of the utility model are: temporary plugging of the iron mouth can be achieved when the mud gun cannot plug the iron mouth, and the method is safe and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is the front view of the utility model;

[0014] Figure 2 It is a side view of the utility model;

[0015] Figure 3 This is a schematic diagram of the use state of the utility model;

[0016] In the figure: protective shell 1, connecting sleeve 2, casting exhaust pipe 3, filler 4, drill rod 5, opening machine 6, iron mouth 7. DETAILED DESCRIPTION

[0017] The present invention will be further described below by way of examples with reference to the accompanying drawings.

[0018] See attached Figure 1-3 A temporary plugging device for a blast furnace comprises a protective shell 1, a connecting sleeve 2, a casting exhaust pipe 3, a filler 4 and a drill rod 5. The protective shell 1 is a hollow cone, and the filler 4 is arranged inside the protective shell 1. The connecting sleeve 2 and the casting exhaust pipe 3 are respectively fixed on the bottom surface of the cone of the protective shell 1, and the drill rod 5 is connected to the connecting sleeve 2.

[0019] In this embodiment, refer to the attached Figure 1-3 The temporary plugging device for a blast furnace comprises a protective shell 1, a connecting sleeve 2, a pouring exhaust pipe 3 and a filler 4, wherein:

[0020] The protective shell 1 is a conical metal shell, the size of which matches the iron mouth.

[0021] One end of the connecting sleeve 2 has an internal thread for connecting to the drill rod, and the other end is welded to the conical bottom surface of the protective shell 1.

[0022] The cast exhaust pipe 3 is welded to the conical bottom surface of the protective shell 1 and communicated with the interior of the protective shell 1 to serve as a filler filling and gas exhaust passage.

[0023] The filler 4 is a refractory castable material, which is filled into the protective shell 1. During the plugging process, the protective shell 1 is melted and contacts with the molten iron, thus playing the role of plugging the iron mouth.

[0024] When plugging the iron mouth, the device is installed on the drill rod of the opening machine, and is driven to the iron mouth by the opening machine so that the cone apex of the protective shell 1 is aligned with the iron mouth for plugging. During this process, the protective shell 1 melts, and the refractory castable material of the filler 4 plays a plugging role. The gas generated inside the protective shell 1 expands and is discharged from the casting exhaust pipe 3 to prevent expansion and explosion.

Claims

1. A temporary plugging device for a blast furnace, characterized in that: The invention comprises a protective shell (1), a connecting sleeve (2), a cast exhaust pipe (3), a filler (4) and a drill rod (5); the protective shell (1) is a hollow cone; the filler (4) is arranged inside the protective shell (1); the connecting sleeve (2) and the cast exhaust pipe (3) are respectively fixed on the bottom surface of the cone of the protective shell (1); and the drill rod (5) is connected to the connecting sleeve (2).

2. A temporary plugging device for a blast furnace according to claim 1, characterized in that: The central axis of the connecting sleeve (2) coincides with the central axis of the hollow cone protective shell (1).

3. A temporary plugging device for a blast furnace according to claim 2, characterized in that: The connecting sleeve (2) is provided with an internal thread, and the drill rod (5) is threadedly connected to the connecting sleeve (2).

4. A temporary plugging device for a blast furnace according to claim 1, characterized in that: The cast exhaust pipe (3) is in communication with the interior of the protective shell (1).

5. A temporary plugging device for a blast furnace according to claim 1, characterized in that: The size of the protective shell (1) matches the iron mouth of the blast furnace.

6. A temporary plugging device for a blast furnace according to claim 1, characterized in that: The filler (4) inside the protective shell (1) is a refractory castable.