Mud sleeve polisher and use method

Abstract

The invention discloses a mud sleeve polisher and a using method, and relates to the technical field of blast furnace ironmaking, the mud sleeve polisher comprises a polishing disc, a plurality of polishing racks and a polishing drill rod, the polishing disc is used for polishing an iron notch mud sleeve, a plurality of fan-shaped notches are formed in the circumferential direction of the polishing disc, and the fan-shaped notches are used for allowing bonding substances polished down when the iron notch mud sleeve is polished to pass through; a polishing plate is arranged between every two fan-shaped notches; the polishing racks are arranged on the polishing plate; one end of the polishing drill rod is fixedly connected with the middle of the polishing disc and is coaxial with the polishing disc, and the other end of the polishing drill rod is detachably and fixedly connected with the blast furnace stokehole tapping machine. The structure is simple, using is convenient, stable production of the blast furnace is effectively guaranteed, and the accident damping-down rate is effectively reduced.

Description

Technical Field

[0001] The invention relates to the technical field of blast furnace ironmaking, and in particular to a mud sleeve grinder and a use method thereof. Background Art

[0002] The current ironmaking process is to load iron-containing raw materials, fuel and other auxiliary materials into the blast furnace from the top of the blast furnace in a certain proportion, and blow hot air into the blast furnace from the tuyere along the furnace circumference at the bottom of the blast furnace by the hot blast furnace. At high temperature, coke and hot air burn to generate carbon monoxide and hydrogen. The descending charge and the rising high-temperature coal gas flow undergo a series of physical and chemical changes to eventually generate molten iron and slag, which are discharged from the taphole out of the furnace. The 7# and 8# blast furnaces are equipped with a rectangular double taphole, which adopts a flattened design and has a total of 4 tapholes. In daily production, two of the four tapholes are used to tap iron, and the other two tapholes are in a disassembled or standby state to tap iron. Baosteel currently has two 4150m 3 The blast furnace opening machine and mud gun are both provided by Germany's TMT company, and the overall process parameters are relatively advanced.

[0003] Under normal production conditions, after receiving the opening command, the furnace opens the iron mouth to tap iron. When the tapping reaches the theoretical amount or the iron mouth has already sprayed out, it is necessary to contact the furnace to use mud guns to plug the mouth. Then a series of work such as pulling out the gun, installing the gun, handling the iron mouth, and replacing the drill bit is carried out, and then wait for the next opening command. Since the use environment of the iron mouth mud sleeve is very harsh, it needs to withstand the adverse effects of high-temperature mechanical scouring, chemical erosion, and iron mouth splashing for a long time, making the maintenance of the iron mouth mud sleeve more difficult. If the inspection and maintenance cannot be kept up in time, the iron mouth will not be blocked due to defects in the mud sleeve, mechanical failure, and the mud gun neck being burned by high-temperature slag iron. Once the iron mouth cannot be blocked normally due to the broken mud sleeve in the later stage of tapping, and there is no remaining capacity in the iron can, a series of production accidents will occur, such as the high-temperature slag iron falling to the ground, the iron can being welded to the railway, burning the track scale, burning the equipment and facilities around the railway equipment, and causing casualties. When the mud sleeve is damaged and cannot block the iron mouth normally, the furnace can only control the discharge of slag and iron by quickly reducing the air flow, which may cause slag to fill the air mouth and air duct, resulting in major production accidents and huge economic losses to the company.

[0004] Based on the above production status and background, the furnace technicians designed and invented a mud sleeve grinding device in combination with on-site production practice. This design device can quickly grind the mud sleeve flat when the mud sleeve fails. The use of this design invention technology eliminates the vicious production accidents caused by the failure of the iron mouth to block the iron and burn the track scale and the equipment and facilities under the railway, and the slag in the air outlet and air duct caused by rapid and large-scale air reduction, and even the air stop operation, effectively avoiding the huge economic losses caused to the enterprise. It has laid a solid foundation for the stable production of blast furnaces, reducing the accidental air stop rate, and reducing the cost of molten iron production. Summary of the invention

[0005] The purpose of the present invention is to provide a mud sleeve grinder and a method of use to solve the problems existing in the above-mentioned prior art. The mud sleeve grinder has a simple structure and is easy to use, and can effectively ensure the stable production of the blast furnace and effectively reduce the accidental shutdown rate.

[0006] To achieve the above object, the present invention provides the following solutions:

[0007] The present invention provides a mud sleeve grinder, comprising: a grinding disc, a plurality of grinding racks and a grinding drill rod, wherein the grinding disc is used to grind the iron mouth mud sleeve, and the grinding disc is provided with a plurality of fan-shaped notches in the circumference thereof, and the fan-shaped notches are used to allow the adhesives ground off when grinding the iron mouth mud sleeve to pass through; a grinding plate is provided between each of the fan-shaped notches; each of the grinding racks is provided on the grinding plate; one end of the grinding drill rod is used to be fixedly connected to the middle part of the grinding disc and is coaxially arranged with the grinding disc, and the other end is used to be detachably fixedly connected to the blast furnace front opening machine.

[0008] Preferably, a connecting portion is provided in the middle of the grinding disc, and a connecting hole is provided in the middle of the connecting portion, and the connecting hole is used for the grinding drill rod to pass through and be fixedly connected with the grinding drill rod by welding.

[0009] Preferably, each of the fan-shaped notches is arranged on the outer side of the connecting portion, the number of the fan-shaped notches is 6, and each of the fan-shaped notches is evenly arranged along the circumference of the grinding disc.

[0010] Preferably, the central angle of the fan-shaped notch is 60 degrees.

[0011] Preferably, the grinding racks are arranged at intervals on the grinding plates, and the grinding racks on two adjacent grinding plates are arranged in a staggered manner.

[0012] Preferably, one end of the grinding rack is embedded in the grinding plate and fixed to the grinding plate by welding, and the other end is a sharp end and protrudes from the grinding plate.

[0013] Preferably, the grinding disc has a diameter of 320 mm and a thickness of 40 mm.

[0014] Preferably, the diameter of the polished drill rod is the same as the diameter of the drill rod used by the blast furnace opening machine.

[0015] Preferably, the length of the grinding drill rod is 5000 mm, and the length of the grinding drill rod passing through the grinding disc is 200 mm.

[0016] The present invention also provides a method for using the mud sleeve grinder as described in any one of the above items, characterized in that it comprises the following steps:

[0017] Connect the grinding drill rod to the blast furnace opening machine, align the grinding disc with the iron mouth hole, start the blast furnace opening machine, and use the grinding disc to grind the iron mouth mud sleeve to make it flat.

[0018] Compared with the prior art, the present invention has achieved the following technical effects:

[0019] The invention provides a mud sleeve grinder and a use method thereof. A grinding drill rod is connected to a blast furnace front opening machine, a grinding disc is aligned with an iron mouth hole, the blast furnace front opening machine is started, and the grinding disc grinds the iron mouth mud sleeve, thereby leveling the iron mouth mud sleeve. By arranging a fan-shaped notch on the grinding disc, adhesives and the like ground off can be blown out smoothly when grinding the iron mouth mud sleeve, avoiding adhesion to the disc and affecting the grinding effect, and on the other hand, the weight of the grinding disc can be greatly reduced. In addition, the grinding drill rod can be connected and used in conjunction with the blast furnace front opening machine, which is convenient to use, and the grinding rack effectively prolongs the service life of the mud sleeve grinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 A schematic diagram of the structure of the mud sleeve grinder provided by the present invention;

[0022] Figure 2 A schematic diagram of the structure of the distribution of grinding discs and grinding racks in the mud sleeve grinder provided by the present invention;

[0023] Figure 3 A schematic diagram of the structure of the connection between the grinding rack and the grinding plate in the mud sleeve grinder provided by the present invention;

[0024] In the figure: 1. grinding disc; 2. fan-shaped notch; 3. grinding plate; 4. connecting part; 5. connecting hole; 6. grinding rack; 7. grinding drill rod. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] The purpose of the present invention is to provide a mud sleeve grinder and a method of use to solve the problems existing in the above-mentioned prior art. The mud sleeve grinder has a simple structure and is easy to use, and can effectively ensure the stable production of the blast furnace and effectively reduce the accidental shutdown rate.

[0027] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] Embodiment 1

[0029] The present invention provides a mud sleeve grinder, such as Figures 1 to 3 As shown, it includes: a grinding disc 1, a plurality of grinding racks 6 and a grinding drill rod 7. The grinding disc 1 is used to grind the iron mouth mud sleeve. The grinding disc 1 is provided with a plurality of fan-shaped notches 2 in the circumference. The fan-shaped notches 2 are used to allow the adhesives ground off when grinding the iron mouth mud sleeve to pass through; a grinding plate 3 is provided between each fan-shaped notch 2; each grinding rack 6 is provided on the grinding plate 3; one end of the grinding drill rod 7 is used to be fixedly connected to the middle part of the grinding disc 1 and passes through the grinding disc 1, and is coaxially arranged with the grinding disc 1, and the other end is used to be detachably fixedly connected to the blast furnace front opening machine, and the grinding drill rod 7 is connected to the blast furnace front opening machine. The utility model is connected with the blast furnace front opening machine, the grinding disc 1 is aligned with the iron mouth hole, the blast furnace front opening machine is started, and the grinding disc 1 grinds the iron mouth mud sleeve, so as to make the iron mouth mud sleeve flat; by arranging the fan-shaped notch 2 on the grinding disc 1, the adhesive and the like ground off can be blown out smoothly when grinding the iron mouth mud sleeve, so as to avoid adhesion on the disc and affect the grinding effect, and on the other hand, the weight of the grinding disc 1 can be greatly reduced; in addition, the grinding drill rod 7 can be connected with the blast furnace front opening machine for use, which is convenient to use, and the grinding rack 6 effectively prolongs the service life of the mud sleeve grinder.

[0030] In a preferred embodiment, a connecting portion 4 is provided in the middle of the grinding disc 1, and a connecting hole 5 is provided in the middle of the connecting portion 4. The connecting hole 5 is used to allow the grinding drill rod 7 to pass through and be welded and fixedly connected to the grinding drill rod 7. The structure is simple, ensuring that the grinding disc 1 can be stably connected to the grinding drill rod 7.

[0031] In a preferred embodiment, each sector-shaped notch 2 is arranged on the outside of the connecting portion 4, the number of sector-shaped notches 2 is 6, each sector-shaped notch 2 is evenly arranged along the circumference of the grinding disc 1, the central angle of the sector-shaped notch 2 is 60 degrees, and the mud sleeve grinder disc does not use a whole disc, but is processed into a plum blossom shape, with an angle of 60 degrees between them. This has the advantage that, on the one hand, the adhesives polished off when polishing the iron mouth mud sleeve can be blown out smoothly to avoid sticking to the disc and affecting the polishing effect, and on the other hand, the weight of the disc can be greatly reduced.

[0032] In a preferred embodiment, the grinding racks 6 are arranged at intervals on the grinding plates 3, and the grinding racks 6 on two adjacent grinding plates 3 are arranged in a staggered manner, thereby reducing the cost while ensuring the grinding effect.

[0033] In a preferred embodiment, one end of the grinding rack 6 is embedded in the grinding plate 3 and welded to the grinding plate 3, and the other end is a sharp end and protrudes from the grinding plate 3. The grinding rack 6 is a rectangular alloy steel rack, and the front end is processed into a sharp end, which effectively improves the grinding effect.

[0034] In a preferred embodiment, the grinding disc 1 has a diameter of 320 mm and a thickness of 40 mm.

[0035] In a preferred embodiment, the diameter of the polished drill rod 7 is the same as the diameter of the drill rod used in the blast furnace opening machine, so that it is convenient to use with the existing blast furnace opening machine.

[0036] In a preferred embodiment, the length of the grinding drill rod 7 is 5000 mm, and the length of the grinding drill rod 7 passing through the grinding disc 1 is 200 mm.

[0037] Embodiment 2

[0038] This embodiment also provides a method for using the mud sleeve grinder as in any one of the first embodiments, characterized in that it comprises the following steps:

[0039] The grinding drill rod 7 is connected to the blast furnace opening machine, the grinding disc 1 is aligned with the iron mouth hole, the blast furnace opening machine is started, and the grinding disc 1 grinds the iron mouth mud sleeve to make the iron mouth mud sleeve flat.

[0040] The mud sleeve grinder and the use method designed by the present invention can quickly and safely ensure the normal iron tapping at the iron mouth in front of the blast furnace under emergency conditions. The device designed by the invention is a grinding device made by combining the existing materials with the working principles of the tapping machine and the mud gun. The specific implementation method of the grinding device is mainly a device for grinding and leveling the iron mouth mud sleeve when the iron mouth mud sleeve is defective or mud is leaking after the tapping is blocked before the blast furnace taps iron, and the iron mouth mud sleeve cannot tap iron. The grinder device can be directly installed on the tapping machine, and the rotation of the tapping machine wind bag can be used to grind and level the iron mouth mud sleeve. The speed is adjustable and can be adjusted according to the needs of the mud sleeve, thereby achieving the purpose of blocking the iron mouth without mud leaking and without accidents.

[0041] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A mud sleeve grinder, characterized in that: include: A grinding disc, the grinding disc is used to grind the taphole mud sleeve, the grinding disc is provided with a plurality of fan-shaped notches in the circumference, the fan-shaped notches are used to allow the adhesives ground off when grinding the taphole mud sleeve to pass through; a grinding plate is provided between each of the fan-shaped notches; A plurality of grinding racks, each of which is arranged on the grinding plate; as well as A grinding drill rod, one end of which is used for fixed connection with the middle part of the grinding disc and passes through the grinding disc, and is coaxially arranged with the grinding disc, and the other end is used for detachably fixed connection with the blast furnace front opening machine.

2. The mud sleeve sander according to claim 1, characterized in that: A connecting portion is provided in the middle of the grinding disc, and a connecting hole is provided in the middle of the connecting portion. The connecting hole is used for the grinding drill rod to pass through and be fixedly connected with the grinding drill rod by welding.

3. The mud sleeve sander according to claim 2, characterized in that: Each of the fan-shaped notches is arranged on the outer side of the connecting portion, the number of the fan-shaped notches is 6, and each of the fan-shaped notches is evenly arranged along the circumference of the grinding disc.

4. The mud sleeve sander according to claim 3, characterized in that: The central angle of the sector-shaped notch is 60 degrees.

5. The mud sleeve sander according to claim 1, characterized in that: The grinding racks are arranged at intervals on the grinding plates, and the grinding racks on two adjacent grinding plates are arranged in a staggered manner.

6. The mud sleeve sander according to claim 5, characterized in that: One end of the grinding rack is embedded in the grinding plate and fixed by welding with the grinding plate, and the other end is a sharp end and protrudes from the grinding plate.

7. The mud sleeve sander according to claim 1, characterized in that: The grinding disc has a diameter of 320 mm and a thickness of 40 mm.

8. The mud sleeve sander according to claim 1, characterized in that: The diameter of the polished drill rod is the same as the diameter of the drill rod used by the blast furnace front opening machine.

9. The mud sleeve sander according to claim 1, characterized in that: The length of the grinding drill rod is 5000 mm, and the length of the grinding drill rod passing through the grinding disc is 200 mm.

10. A method for using the mud sleeve sander according to any one of claims 1 to 9, characterized in that: The following steps are involved: Connect the grinding drill rod to the blast furnace opening machine, align the grinding disc with the iron mouth hole, start the blast furnace opening machine, and use the grinding disc to grind the iron mouth mud sleeve to make it flat.

Images