CN110842726A

CN110842726A - Pin head cleaning and grinding device for inner wall of blast furnace tuyere and recycling method thereof

Info

Publication number: CN110842726A
Application number: CN201911300263.3A
Authority: CN
Inventors: 廖海欧; 高鹏; 郑作宝; 江济
Original assignee: Maanshan Iron and Steel Co Ltd
Current assignee: Maanshan Iron and Steel Co Ltd
Priority date: 2019-12-17
Filing date: 2019-12-17
Publication date: 2020-02-28

Abstract

The invention discloses a pin head cleaning and grinding device for the inner wall of a blast furnace tuyere and a recycling method thereof, and belongs to the technical field of blast furnace cleaning. The water vapor grinding disc comprises a grinding disc main body, alloy T-shaped grooves are formed in the outer ring of the grinding disc main body at equal intervals, T-shaped grinding blades are arranged in the groove holes of the alloy T-shaped grooves, the grinding disc main body is composed of a primary grinding disc and a secondary grinding disc, and water vapor through holes are uniformly formed in the surfaces of the primary grinding disc and the secondary grinding disc respectively. The T-shaped grinding edge on the surface of the main body of the grinding disc is used for cleaning the inside of the blast furnace, accumulated materials in the blast furnace can be cleaned at one time, the air port installation requirement is met, the consumption is greatly reduced, the requirement of uniform cooling by water spraying during operation is met, the rapid cooling is realized, heat accumulation is avoided, the main body structure of the device can be recycled, the cleaning effect is improved by selecting the T-shaped grinding edges made of different materials and in different shapes, the working efficiency is accelerated, and the main body of the grinding disc can adapt to the high-temperature and severe environment in the blast furnace.

Description

Pin head cleaning and grinding device for inner wall of blast furnace tuyere and recycling method thereof

Technical Field

The invention relates to the technical field of blast furnace cleaning, in particular to a pin head cleaning and grinding device for the inner wall of a blast furnace tuyere and a recycling method thereof.

Background

In modern large-scale blast furnace ironmaking production, 30-40 air supply devices are arranged, and hot air is uniformly fed into a blast furnace around a circular furnace body to perform blast furnace ironmaking and smelting production. The end of the air supply device is provided with a tuyere big sleeve, a middle sleeve and a small sleeve, the big sleeve is fixed on the furnace shell, the middle sleeve and the small sleeve extend into the furnace, the middle sleeve and the small sleeve need to be frequently replaced for red copper wearing parts, and the replacement steps are as follows: the small sleeve and the middle sleeve of the damaged tuyere are pulled out in sequence, and after the high-temperature iron slag furnace burden in the area is cleaned manually, the small sleeve of the tuyere middle sleeve is installed in sequence, and the blast furnace production is recovered. The high-temperature iron slag furnace burden in the area is manually cleaned for a long time, the operation environment of the area is extremely severe, high temperature is accompanied by coal gas, dust, water vapor and the like, the operation efficiency is low, and mechanical cleaning equipment developed in the prior art can reduce the labor intensity of field operation, but the grinding head extending into the furnace for cleaning is large in consumption and needs to be continuously replaced, and the action efficiency does not reach the expected target.

Disclosure of Invention

1. Technical problem to be solved by the invention

Aiming at the defects and shortcomings in the prior art, the invention provides a pin head cleaning and grinding device for the inner wall of a blast furnace tuyere and a recycling method thereof.

2. Technical scheme

In order to achieve the purpose, the technical scheme provided by the invention is as follows:

the invention relates to a grinding head device for cleaning the inner wall of a blast furnace tuyere, which comprises a grinding disc main body, wherein alloy T-shaped grooves are arranged at equal intervals on the outer ring of the grinding disc main body, T-shaped grinding blades are arranged in the groove holes of the alloy T-shaped grooves, the grinding disc main body consists of a primary grinding disc and a secondary grinding disc, mounting positioning holes are formed in the surfaces of the primary grinding disc and the secondary grinding disc, the mounting positioning holes are symmetrically distributed on the surface of the grinding disc main body, long bolts are mounted in the mounting positioning holes, one ends of the long bolts are connected with a mechanical driving device, the primary grinding disc and the secondary grinding disc are connected with the mechanical driving device through long bolts, water vapor through holes are uniformly formed in the surfaces of the primary grinding disc and the secondary grinding disc respectively, the water vapor holes are arranged at equal intervals on the surfaces of the primary grinding disc and the secondary grinding disc respectively, and a conical hole combined transmission sleeve is arranged at, the outside of taper hole combination transmission cover is provided with mechanical drive and connects the keyway, and mechanical drive device's output is provided with the transmission shaft, and the one end of transmission shaft extends to the inner circle of taper hole combination transmission cover and is connected the keyway block with mechanical drive.

Furthermore, the T-shaped grinding blades are assembled in the groove holes of the alloy T-shaped grooves and fixed through brazing, and 32-44 alloy T-shaped grooves are uniformly formed in the outer rings of the primary grinding disc and the secondary grinding disc respectively.

Furthermore, the bottom of the T-shaped sharpening edge is provided with a double-layer buffering clamping pad, and two sides of the double-layer buffering clamping pad are respectively flexibly attached to the bottom surface of the T-shaped sharpening edge and the inner groove surface of the alloy T-shaped groove.

Furthermore, the T-shaped sharpening edge is made of alloy materials, and the front end of the T-shaped sharpening edge is conical.

Furthermore, the T-shaped grinding edge is a titanium alloy grinding head, and the front end of the T-shaped grinding edge is irregular and linear.

Furthermore, the T-shaped sharpening edge adopts a high-strength ceramic head, and the front end of the T-shaped sharpening edge is arc-shaped.

Furthermore, the taper of the mounting hole of the taper hole combined transmission sleeve is 1: 10-1: 20, and the primary grinding disc and the secondary grinding disc are sleeved on the outer ring of the taper hole combined transmission sleeve together.

Furthermore, the diameter of the primary grinding disc is 90-105% of the diameter of the front part of the tuyere small sleeve, and the diameter of the secondary grinding disc is 90-95% of the diameter of the tail part of the tuyere small sleeve.

A method for recycling a pin head device of a blast furnace tuyere inner wall cleaning mill comprises the following steps:

the method comprises the following steps: closing the mechanical driving device, and disconnecting the mechanical driving device from the long bolt;

step two: separating the primary grinding disc from the secondary grinding disc, respectively cleaning impurities on the surfaces of the primary grinding disc and the secondary grinding disc, and checking the permeability of the water vapor through hole;

step three: heating the welding seam connection part of the alloy T-shaped groove and the T-shaped grinding edge, cleaning the welding seam, sequentially detaching the T-shaped grinding edge, and cleaning impurities on the inner side of the alloy T-shaped groove;

step four: replacing and installing the T-shaped grinding edge, and respectively fixing the replaced T-shaped grinding edge in the alloy T-shaped grooves on the surfaces of the primary grinding disc and the secondary grinding disc through brazing;

step five: and the long bolt sequentially penetrates through the mounting positioning holes on the surfaces of the first-stage grinding disc and the second-stage grinding disc to be assembled, and the long bolt is externally connected with a mechanical driving device to run in a test mode.

3. Advantageous effects

Compared with the prior art, the technical scheme provided by the invention has the following beneficial effects:

(1) according to the invention, the T-shaped grinding edge on the surface of the main body of the grinding disc is used for cleaning in the furnace, accumulated materials in the furnace can be cleaned at one time, the air port installation requirement is met, the consumption is greatly reduced, water flow can be sprayed in through the water vapor through holes on the surface, so that the requirement of uniform water spraying and cooling during operation is met, the effect of increasing the water spraying amount is achieved by increasing the number of the water vapor through holes, the uniform cooling can be realized, the rapid cooling can be realized, and the heat accumulation is avoided. The primary grinding disc and the secondary grinding disc are connected with a mechanical driving device through long bolts, so that the mechanical grinding head can be effectively prevented from falling off in the furnace body.

(2) The main structure of the device can be recycled, only partial worn and failed T-shaped grinding edges are needed to be replaced, and by selecting T-shaped grinding edges of different materials and different shapes, the sharp conical grinding head can be used for grinding stubborn slag, and the irregular grinding head can be used for carpet type covering grinding of high-temperature iron slag furnace burden randomly distributed in the furnace, so that the cleaning effect is improved, the working efficiency is accelerated, and the grinding disc main body can adapt to a high-temperature and severe environment in the blast furnace.

Drawings

FIG. 1 is a front view of a grinding disk body of the present invention;

FIG. 2 is a side view of the grinding disk body of the present invention;

FIG. 3 is a view showing the effect of the installation of the T-shaped sharpening blade according to the present invention;

FIG. 4 is a structural diagram of an external mechanical driving device according to the present invention;

FIG. 5 is a diagram showing the effect of the installation of the double-layer buffer clamping pad in embodiment 2 of the present invention;

FIG. 6 is a structural view of a T-shaped sharpening blade in example 3 of the present invention;

FIG. 7 is a structural view of a T-shaped sharpening blade in example 4 of the present invention.

In the figure: 1. t-shaped sharpening; 2. an alloy T-shaped groove; 3. grinding the disc body; 4. installing a positioning hole; 5. a primary grinding disc; 6. a secondary grinding disc; 7. a water vapor through hole; 8. a mechanical drive connection keyway; 9. a taper hole combined transmission sleeve; 10. a long bolt; 11. a mechanical drive device; 12. double-layer buffer clamping pads.

Detailed Description

The invention is further described with reference to the following figures and examples:

example 1

As can be seen from fig. 1-4, the blast furnace tuyere inner wall cleaning grinding pin head device of the present embodiment includes a grinding disc main body 3, alloy T-shaped grooves 2 are equidistantly arranged on an outer ring of the grinding disc main body 3, T-shaped grinding blades 1 are arranged in groove holes of the alloy T-shaped grooves 2, the grinding disc main body 3 is composed of a primary grinding disc 5 and a secondary grinding disc 6, a diameter of the primary grinding disc 5 is 90% -105% of a diameter of a front portion of a small sleeve in the tuyere, a diameter of the secondary grinding disc 6 is 90% -95% of a diameter of a tail portion of the small sleeve in the tuyere, a mechanical grinding head is suitable for the requirements of the tuyere, mounting positioning holes 4 are respectively arranged on the surfaces of the primary grinding disc 5 and the secondary grinding disc 6, the mounting positioning holes 4 are symmetrically distributed on the surface of the grinding disc main body 3, long bolts 10 are mounted in the mounting holes 4, one end of the, therefore, the mechanical grinding head can be effectively prevented from falling off in the furnace body, the primary grinding disc 5 and the secondary grinding disc 6 are connected with a mechanical driving device 11 together through a long bolt 10, the surfaces of the primary grinding disc 5 and the secondary grinding disc 6 are respectively and uniformly provided with water vapor through holes 7, the water vapor through holes 7 are respectively arranged on the surfaces of the primary grinding disc 5 and the secondary grinding disc 6 at equal intervals, water flow can be sprayed in through the water vapor through holes 7 on the surfaces, so that the requirement of uniform water spraying and cooling during operation is met, the effect of increasing the water spraying amount is achieved by increasing the number of the water vapor through holes 7, uniform cooling can be realized, rapid cooling can be realized, heat accumulation is avoided, a conical hole combined transmission sleeve 9 is arranged at the center of a circle of the grinding disc main body 3, the mounting hole taper of the conical hole combined transmission sleeve 9 is 1: 10-1: 20, and the conical hole combined transmission, the primary grinding disc 5 and the secondary grinding disc 6 are jointly sleeved on an outer ring of the taper hole combined transmission sleeve 9, a mechanical drive connecting key groove 8 is formed in the outer portion of the taper hole combined transmission sleeve 9, a transmission shaft is arranged at the output end of the mechanical drive device 11, one end of the transmission shaft extends to an inner ring of the taper hole combined transmission sleeve 9 and is clamped with the mechanical drive connecting key groove 8, and high-torque mechanical power transmission is guaranteed.

T type sharpening 1 assembles in the slotted hole of alloy T type groove 2 and fixed through copper brazing, after the heating, can clear up the welding seam, pull down T type sharpening 1, one-level grinding dish 5, the quantity of the alloy T type groove 2 of second grade grinding dish 6 outer lane evenly is provided with 32 ~ 44 respectively, according to one-level grinding dish 5, the external diameter of second grade grinding dish 6, can be to the actual quantity of the quantity of alloy T type groove 2, the interval carries out the pertinence design, thereby satisfy different blast furnace tuyere, more possess the practicality, T type sharpening 1 chooses for use alloy material, easy to produce, hardness is high, T type sharpening 1's front end is coniform, most advanced outstanding form intensity is higher, stress is more concentrated, grinding effect is better, it is more excellent to the effect of polishing of stubborn traveling slag.

the method comprises the following steps: closing the mechanical driving device 11, and disconnecting the mechanical driving device 11 from the long bolt 10;

step two: separating the primary grinding disc 5 from the secondary grinding disc 6, respectively cleaning impurities on the surfaces of the primary grinding disc 5 and the secondary grinding disc 6, and checking the permeability of the water vapor through hole 7;

step three: heating the welding seam connection part of the alloy T-shaped groove 2 and the T-shaped grinding edge 1, cleaning the welding seam, sequentially detaching the T-shaped grinding edge 1, and cleaning impurities on the inner side of the alloy T-shaped groove 2;

step four: replacing and installing the T-shaped grinding edge 1, and respectively fixing the replaced T-shaped grinding edge 1 in the alloy T-shaped groove 2 on the surfaces of the primary grinding disc 5 and the secondary grinding disc 6 through brazing;

step five: the long bolt 10 penetrates through the mounting positioning holes 4 on the surfaces of the primary grinding disc 5 and the secondary grinding disc 6 in sequence to be assembled, the long bolt 10 is externally connected with a mechanical driving device 11 to perform trial operation, the trial operation is performed at a slow speed, and if no abnormal sound exists, the rotating speed can be increased and the long bolt is put into use.

Example 2

It can be seen from fig. 5 that a blast furnace tuyere inner wall clearance grinding pin head device of this embodiment, including grinding disk main part 3, the outer lane equidistance interval of grinding disk main part 3 is equipped with alloy T type groove 2, be provided with T type sharpening edge 1 in the slotted hole of alloy T type groove 2, double-deck buffering clamping pad 12 is installed to the bottom of T type sharpening edge 1, the both sides of double-deck buffering clamping pad 12 respectively with the bottom surface of T type sharpening edge 1, the flexible laminating of inner tank face of alloy T type groove 2, the elastic force through double-deck buffering clamping pad 12 produces the tight effect of clamp to its both sides respectively, both can cushion the atress of T type sharpening edge 1, protect alloy T type groove 2, avoid simultaneously that impurity in the stove gets into in the gap between T type sharpening edge 1 and the alloy T type groove 2, double-deck buffering clamping pad 12 chooses for use heat-proof silica gel material for use, it is durable, long service.

When changing this T type sharpening edge 1, need not to heat the clearance welding seam, pertinence change surperficial damaged T type sharpening edge 1, because double-deck buffering presss from both sides tight pad 12 and does not expose outside, change double-deck buffering and press from both sides tight pad 12 as the circumstances can.

Example 3

It can be seen from fig. 6 that a blast furnace tuyere inner wall clearance grinding pin head device of this embodiment, including grinding disk main part 3, the outer lane equidistance interval of grinding disk main part 3 is equipped with alloy T type groove 2, be provided with T type sharpening edge 1 in the slotted hole of alloy T type groove 2, titanium alloy sharpening head is chooseed for use to T type sharpening edge 1, titanium alloy material intensity is high, corrosion resistance is good, the heat resistance is high, the advantage that possesses the high life, the front end of T type sharpening edge 1 is irregular linearity, because high temperature slag iron furnace charge distribution in the blast furnace has uncertainty and inhomogeneity, so choose irregular and work covering surface great tool bit, this tool bit during operation, working area is wideer, the clearance effect is better, compared with traditional conical tool bit, the clearance time that the equal furnace inner area of clearance needs is shorter, work efficiency is higher.

Example 4

It can be seen from figure 7, the first device of blast furnace tuyere inner wall clearance abrasive pin of this embodiment, including grinding dish main part 3, the outer lane equidistance interval of grinding dish main part 3 is equipped with alloy T type groove 2, be provided with T type sharpening 1 in the slotted hole of alloy T type groove 2, high strength ceramic head is chooseed for use to T type sharpening 1, it is most above 2000 ℃ to have the high melting point, high hardness, high wear resistance, advantages such as oxytolerant, can adapt to high temperature and abominable environment in the blast furnace, its linear expansion coefficient is lower than the metal simultaneously, fabulous chemical stability has under the high temperature, T type sharpening 1's front end is circular-arcly, circular-arc tool bit is in the course of the work, can not produce wearing and tearing to the blast furnace inner wall, can reach the effect of protection furnace body inner.

According to the invention, the T-shaped grinding edge 1 on the surface of the grinding disc main body 3 is used for cleaning in the furnace, accumulated materials in the furnace can be cleaned at one time, the air port installation requirement is met, the consumption is greatly reduced, water flow can be sprayed in through the water vapor through holes 7 on the surface, so that the requirement of uniform water spraying and cooling during operation is met, the effect of increasing the water spraying amount is achieved by increasing the number of the water vapor through holes 7, the uniform cooling can be realized, the rapid cooling can be realized, and the heat accumulation is avoided. The primary grinding disk 5 and the secondary grinding disk 6 are connected with a mechanical driving device 11 through a long bolt 10, so that the mechanical grinding head can be effectively prevented from falling off in the furnace body.

The device major structure all can recycle, only need to change partial wear failure's T type sharpening 1 can, through chooseing for use different materials, the T type sharpening 1 of different shapes, can adopt sharp conical bistrique to polish to stubborn slag, also can adopt irregular bistrique to carry out carpet formula to the high temperature slag iron furnace charge that distributes at will in the stove and cover and polish, improve the cleaning effect, accelerate work efficiency, make grinding dish main part 3 can adapt to high temperature and abominable environment in the blast furnace.

The present invention and its embodiments have been described above schematically, without limitation, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching, without departing from the spirit of the invention, the person skilled in the art shall not inventively design the similar structural modes and embodiments to the technical solution, but shall fall within the scope of the invention.

Claims

1. The utility model provides a blast furnace tuyere inner wall clearance grinds round pin head device, includes grinding dish main part (3), its characterized in that: the grinding disc is characterized in that alloy T-shaped grooves (2) are formed in the outer ring of the grinding disc main body (3) at equal intervals, T-shaped grinding blades (1) are arranged in the groove holes of the alloy T-shaped grooves (2), the grinding disc main body (3) is composed of a first-stage grinding disc (5) and a second-stage grinding disc (6), mounting positioning holes (4) are formed in the surfaces of the first-stage grinding disc (5) and the second-stage grinding disc (6), the mounting positioning holes (4) are symmetrically distributed on the surface of the grinding disc main body (3), long bolts (10) are mounted in the mounting positioning holes (4), one ends of the long bolts (10) are connected with a mechanical driving device (11), the first-stage grinding disc (5) and the second-stage grinding disc (6) are connected with the mechanical driving device (11) through the long bolts (10), and water vapor through holes (7) are uniformly formed in the surfaces of the, the water vapor through holes (7) are respectively arranged on the surfaces of the first-stage grinding disc (5) and the second-stage grinding disc (6) at equal intervals, a taper hole combined transmission sleeve (9) is arranged at the circle center of the grinding disc main body (3), a mechanical drive connecting key groove (8) is arranged outside the taper hole combined transmission sleeve (9), a transmission shaft is arranged at the output end of the mechanical drive device (11), and one end of the transmission shaft extends to the inner ring of the taper hole combined transmission sleeve (9) and is connected with the mechanical drive through key groove (8) in a clamping mode.

2. The blast furnace tuyere inner wall cleaning grinding pin head device according to claim 1, wherein: the T-shaped grinding edge (1) is assembled in a groove hole of the alloy T-shaped groove (2) and fixed through brazing, and 32-44 alloy T-shaped grooves (2) on the outer rings of the primary grinding disc (5) and the secondary grinding disc (6) are uniformly arranged.

3. The blast furnace tuyere inner wall cleaning grinding pin head device according to claim 1, wherein: the bottom of T type sharpening edge (1) install double-deck buffering and press from both sides tight pad (12), the both sides of double-deck buffering press from both sides tight pad (12) with the bottom surface of T type sharpening edge (1), the interior groove face flexible laminating of alloy T type groove (2) respectively.

4. The blast furnace tuyere inner wall cleaning grinding pin head device according to claim 1, wherein: the T-shaped sharpening edge (1) is made of alloy materials, and the front end of the T-shaped sharpening edge (1) is conical.

5. The blast furnace tuyere inner wall cleaning grinding pin head device according to claim 1, wherein: the T-shaped grinding edge (1) is a titanium alloy grinding head, and the front end of the T-shaped grinding edge (1) is irregular and linear.

6. The blast furnace tuyere inner wall cleaning grinding pin head device according to claim 1, wherein: the T-shaped sharpening edge (1) is a high-strength ceramic head, and the front end of the T-shaped sharpening edge (1) is arc-shaped.

7. The blast furnace tuyere inner wall cleaning grinding pin head device according to claim 1, wherein: the taper of the mounting hole of the taper hole combined transmission sleeve (9) is 1: 10-1: 20, and the primary grinding disc (5) and the secondary grinding disc (6) are sleeved on the outer ring of the taper hole combined transmission sleeve (9) together.

8. The blast furnace tuyere inner wall cleaning grinding pin head device according to claim 1, wherein: the diameter of the primary grinding disc (5) is 90-105% of the diameter of the front part of the tuyere small sleeve, and the diameter of the secondary grinding disc (6) is 90-95% of the diameter of the tail part of the tuyere small sleeve.

9. A recycling method of a pin head device for cleaning and grinding the inner wall of a blast furnace tuyere is characterized by comprising the following steps: the method comprises the following steps:

the method comprises the following steps: closing the mechanical driving device (11), and disconnecting the mechanical driving device (11) from the long bolt (10);

step two: separating the primary grinding disc (5) from the secondary grinding disc (6), respectively cleaning impurities on the surfaces of the primary grinding disc (5) and the secondary grinding disc (6), and checking the permeability of the water vapor through hole (7);

step three: heating the welding seam connection part of the alloy T-shaped groove (2) and the T-shaped grinding edge (1), cleaning the welding seam, sequentially detaching the T-shaped grinding edge (1), and cleaning impurities on the inner side of the alloy T-shaped groove (2);

step four: replacing and installing the T-shaped grinding edge (1), and respectively fixing the replaced T-shaped grinding edge (1) in the alloy T-shaped groove (2) on the surfaces of the primary grinding disc (5) and the secondary grinding disc (6) through brazing;

step five: and the long bolt (10) penetrates through the mounting positioning holes (4) on the surfaces of the primary grinding disc (5) and the secondary grinding disc (6) in sequence for assembly, and the long bolt (10) is externally connected with a mechanical driving device (11) for trial operation.