Auxiliary tool for oxygen burning operation of blast furnace tuyere and method for oxygen burning operation of blast furnace tuyere

Abstract

The application discloses a high furnace iron mouth oxygen burning operation auxiliary tool and a high furnace iron mouth oxygen burning operation method. The high furnace iron mouth oxygen burning operation auxiliary tool comprises a sleeve pipe fixed above a skimmer, two first tracks, a first gantry and a second gantry connected with the two first tracks, a first through hole arranged in the center of a first cross beam of the first gantry, a second through hole arranged in the center of a second cross beam of the second gantry and a first lock hole penetrating through the wall of the second through hole, two second tracks and a third gantry slidably connected with the second tracks, a third through hole arranged in the third gantry and a second lock hole penetrating through the wall of the third through hole, and the first track is located between the second tracks, the axis of the first through hole, the second through hole, the sleeve pipe and the third through hole is parallel to a horizontal plane, the height of the first through hole, the second through hole, the sleeve pipe and the third through hole increases in sequence, and the height of the first through hole is higher than the center point of the high furnace iron mouth. The application can make the iron mouth oxygen burning operation process safe and easy, and can eliminate the original oxygen burning operation burning deviation iron mouth phenomenon.

Description

Technical Field

[0001] The present invention relates to the technical field of smelting, and in particular to auxiliary tooling for blast furnace taphole oxygen burning operation and a blast furnace taphole oxygen burning operation method. Background Art

[0002] Burning oxygen at the iron mouth is a routine operation at the iron mouth of a blast furnace. Generally, it is necessary to organize oxygen burning at the iron mouth when the iron mouth cannot be opened (the taphole mud is hard, or the opening equipment has insufficient kinetic energy, or the equipment fails), the drill rod is stuck at the iron mouth, there are foreign objects blocking the iron mouth channel, or the slag and iron temperature in the blast furnace hearth is low (the slag and iron have poor fluidity and are heated by burning oxygen). The purpose is to open the iron mouth and allow the slag and iron inside the hearth to flow out smoothly.

[0003] The metal oxygen burning pipe for the taphole is generally about 6 meters long (depending on the demand, some oxygen burning pipes can be set according to the operation content). The main trench of the blast furnace is about 20 meters long. The oxygen burning process requires multiple pipes to be connected through large and small joints. The conventional operation process of the taphole oxygen burning operation is as follows: Figure 1 Operator A stands outside the main ditch 2' of the blast furnace 1' and uses a metal oxygen-burning pipe 3' to introduce high-pressure oxygen. The high temperature in the iron mouth 4' channel and the help of external sparks generate high temperature, which burns and melts the refractory clay in the iron mouth 4' channel and flows out of the iron mouth 4'. The metal oxygen-burning pipe 3' continues to burn section by section, and finally the channel of the iron mouth 3' is burned through, so that the slag and iron of the blast furnace 1' can flow smoothly through the iron mouth 4' into the main ditch 2', and the slag and molten iron are separated under the action of the slag skimmer 5' in the main ditch 2'.

[0004] In the prior art, the oxygen burning operation at the iron mouth of a blast furnace has the following problems:

[0005] (1) The operators stand on both sides of the main trench to work, and a large amount of high-temperature slag iron is stored in the main trench. Both sides are high-temperature, dusty, and toxic gas areas. The operators are at extremely high risk. They need to wear high-temperature protective clothing, protective gloves, protective masks, etc. during the oxygen burning operation. The oxygen burning operation requires manual labor to press the oxygen pipe along the iron mouth channel according to the melting speed of the iron mouth channel, which requires a lot of physical strength; wearing high-temperature protective clothing, protective shoes, etc. has a great impact on the operator's position and walking, and is not conducive to work safety; wearing a mask affects the operator's vision, which is also not conducive to work safety. Therefore, the existing oxygen burning operation is a very risky physical labor.

[0006] (2) Under the existing technical conditions, the iron mouth of the blast furnace is led out from the blast furnace at the front end of the main groove, facing the center line of the main groove. The width of the main groove is generally about 1.2 meters or even wider. The operators stand on both sides of the main groove, holding dozens of meters long oxygen burning tubes in their hands. It is difficult to align the iron mouth when passing it into the iron mouth (it needs to be aligned with the center of the iron mouth). In many cases, the iron mouth is burned off-center, which can easily cause the iron mouth channel to burn out or burn out, and even burn out the carbon bricks in the iron mouth area.

[0007] (3) During the oxygen burning operation, a dedicated person (the person at the front) is required to control the metal oxygen burning pipe. On the one hand, he needs to control the forward direction of the metal oxygen burning pipe, and on the other hand, he needs to compact it with force, which consumes a lot of labor. At the back, one person is required to control the oxygen interface and one person to control the oxygen switch. In order to prevent the oxygen burning pipe from falling off, generally one person holds each section of the oxygen burning pipe, and there are many people involved in the operation.

[0008] (4) Operators work on both sides of the main trench. The dust, toxic gas, smoke, etc. generated during the oxygen burning process inevitably spread to the personnel area, causing the operators to inhale and feel unwell.

[0009] (5) In the existing oxygen burning process, the operator manually operates the oxygen burning pipe. At the moment the iron mouth is burned through, slag and iron are quickly ejected under high pressure inside the furnace. The oxygen burning operator needs to react and evacuate quickly. If the operator fails to react in time, he or she may be easily burned by the high-temperature slag and iron.

[0010] (6) During the oxygen burning process, after the first section of the oxygen burning metal pipe near the taphole is melted, the metal pipe at the back is pushed forward. When the metal pipe approaches the operator's position, the oxygen needs to be stopped and the metal pipe installed. Then, according to the melting speed of the metal pipe, the oxygen needs to be frequently turned on and off, and the metal pipe needs to be installed again until the taphole is burned through. When the oxygen burning pipe is connected, the front oxygen burning pipe is very likely to be offset, and the alignment needs to be readjusted. The oxygen burning operation needs to be stopped intermittently. The taphole channel that was melted in the early stage condenses and needs to be reheated, melted, and blown out again, resulting in a waste of metal pipes and oxygen, which is not conducive to reducing production costs. Summary of the Invention

[0011] The purpose of the present invention is to provide a blast furnace taphole oxygen burning operation auxiliary tooling and a blast furnace taphole oxygen burning operation method, which can make the taphole oxygen burning operation process safe and easy, and can eliminate the original phenomenon of burning the taphole off-center during oxygen burning operation.

[0012] To achieve this object, the present invention adopts the following technical solutions:

[0013] On the one hand, a blast furnace iron mouth oxygen burning operation auxiliary tool is provided, comprising:

[0014] a casing fixed above the center of the skimmer, the skimmer being located in the main trench;

[0015] two first rails located on both sides of the main groove and extending along the length direction of the main groove, a first gantry and a second gantry slidably connected to the two first rails, a crossbeam of the first gantry having a first through hole formed at a center position along its length direction, a crossbeam of the second gantry having a second through hole formed at a center position along its length direction and a first locking hole extending through a wall of the second through hole, a first locking screw being installed in the first locking hole;

[0016] Two second rails extending along the length of the main groove on both sides of the main groove and a third gantry slidably connected to the second rails, a third through hole and a second locking hole extending through the wall of the third through hole are formed at a center position of the crossbeam of the third gantry along its length, and a second locking screw is installed in the second locking hole;

[0017] The two first rails are located between the two second rails, and the axes of the first through hole, the second through hole, the sleeve, and the third through hole are all parallel to the horizontal plane, and the heights of the axes of the first through hole, the sleeve, the second through hole, and the third through hole increase successively, and the height of the axis of the first through hole is higher than the center point of the outlet side of the blast furnace iron mouth.

[0018] As a further solution of the auxiliary tooling for oxygen burning operations at the iron mouth of a blast furnace, the end of the first rail close to the iron mouth of the blast furnace does not exceed the main groove, and each of the first rails is provided with a first limit buckle and a second limit buckle at intervals along its length direction. The first limit buckle is located at the end of the first rail close to the iron mouth of the blast furnace, the second limit buckle is adjacent to the slag skimmer, the first gantry is located between the first limit buckle and the second limit buckle, and the second gantry is located on the side of the second limit buckle away from the first limit buckle.

[0019] As a further solution of the auxiliary tooling for the blast furnace iron mouth oxygen burning operation, the position of the first limit buckle does not exceed the landing point of the slag flowing out of the iron mouth during the normal slag tapping process of the blast furnace iron mouth.

[0020] As a further solution of the auxiliary tooling for blast furnace iron mouth oxygen burning operation, the end of the second rail close to the blast furnace iron mouth does not exceed the slag skimmer, and each end of the second rail close to the blast furnace iron mouth is provided with a third limit buckle.

[0021] As a further solution of the auxiliary tooling for the blast furnace iron mouth oxygen burning operation, the height of the crossbeam of the third gantry is 100-200 mm higher than the height of the crossbeam of the second gantry.

[0022] As a further solution of the auxiliary tooling for blast furnace iron mouth oxygen burning operations, the lower ends of the support frames of the first gantry and the second gantry are respectively rollingly connected to the first rail through a first fixed pulley, and the lower end of the support frame of the third gantry is rollingly connected to the second rail through a second fixed pulley, and the first fixed pulley and the second fixed pulley can be separated from the first rail and the second rail respectively.

[0023] As a further solution of the auxiliary tooling for the blast furnace iron mouth oxygen burning operation, the auxiliary tooling for the blast furnace iron mouth oxygen burning operation also includes a high-temperature resistant rubber skin. After the first fixed pulley and the second fixed pulley are separated from the first rail and the second rail respectively, the high-temperature resistant rubber skin can be laid on the first rail and the second rail.

[0024] As a further solution of the auxiliary tooling for blast furnace iron mouth oxygen burning operation, the auxiliary tooling for blast furnace iron mouth oxygen burning operation also includes:

[0025] a first motor, mounted on the furnace platform and connected to a first fixed pulley at the lower end of the first gantry via a first chain, wherein the outer periphery of the first fixed pulley is provided with engaging teeth that engage with the first chain, and the first motor can drive the first gantry to move along the length direction of the first track via the first chain;

[0026] a second motor, mounted on the furnace platform and connected to the first fixed pulley at the lower end of the second gantry via a second chain, the first fixed pulley being provided with meshing teeth that mesh with the second chain on its outer periphery, and the second motor being capable of driving the second gantry to move along the length direction of the first track via the second chain;

[0027] The third motor is installed on the furnace platform and connected to the second fixed pulley at the lower end of the third gantry through a third chain. The outer periphery of the second fixed pulley is provided with engaging teeth that engage with the third chain. The third motor can drive the third gantry to move along the length direction of the second track through the third chain.

[0028] On the other hand, a method for oxygen burning at the iron mouth of a blast furnace is provided, which uses the auxiliary tooling for oxygen burning at the iron mouth of a blast furnace as described above, and the method for oxygen burning at the iron mouth of a blast furnace comprises the following steps:

[0029] S10, take 2-3 sections of metal oxygen burning pipes, connect them in sequence, and pass them through the sleeve on the skimmer and the first through hole on the first gantry;

[0030] S20, pushing the first gantry to move toward the blast furnace iron mouth to a position not exceeding and close to a position where slag flows out of the iron mouth during normal slag tapping of the blast furnace iron mouth;

[0031] S30, taking a plurality of metal oxygen-burning pipes and docking them in sequence, and passing them through the second through holes of the second gantry, and then locking them with the first locking screw for standby use; the metal oxygen-burning pipes on the second gantry are respectively docked with the metal oxygen-burning pipes and the oxygen delivery hoses on the first gantry, and the metal oxygen-burning pipes are positioned directly opposite and adjacent to the center point of the blast furnace iron mouth, and the oxygen delivery hose is connected to an oxygen source; opening the valve of the oxygen source, and introducing oxygen into the oxygen delivery hose. After the metal oxygen-burning pipes adjacent to the blast furnace iron mouth are burning, the second gantry is pushed toward the blast furnace iron mouth, so that the metal oxygen-burning pipes extend into the blast furnace iron mouth and continue to burn;

[0032] S40, take a number of metal oxygen-burning pipes and connect them in sequence, pass them through the third through hole, and then use the second locking screw to lock them for standby use; when the second gantry moves to the skimmer, loosen the first locking screw that fixes the metal oxygen-burning pipe, push the second gantry back to the initial position in the opposite direction, separate the metal oxygen-burning pipe from the second gantry, and then connect the metal oxygen-burning pipe with the metal oxygen-burning pipe on the third gantry; close the valve of the oxygen source, connect the oxygen delivery hose with the metal oxygen-burning pipe on the third gantry, and open Open the valve of the oxygen source, introduce oxygen into the oxygen delivery hose, push the third gantry to move toward the blast furnace iron mouth, and make the metal oxygen burning pipe extend into the blast furnace iron mouth and continue to burn; when the third gantry moves to the slag skimmer, loosen the second locking screw that fixes the metal oxygen burning pipe, push the third gantry in the reverse direction back to the initial position, return to step S30, and alternately dock the metal oxygen burning pipes pre-installed on the second gantry and the third gantry until the blast furnace iron mouth is burned through.

[0033] As a further solution of the blast furnace iron mouth oxygen burning operation method, in step S30, if the conditions are met at the channel of the blast furnace iron mouth: the temperature is above 700°C and there are sparks, then the valve opening of the oxygen source is adjusted to ensure that oxygen is blown out of the metal oxygen burning pipe. After the metal oxygen burning pipe burns, the valve opening of the oxygen source is gradually increased; if the conditions are not met at the channel of the blast furnace iron mouth, a burning fire source is placed at the center point of the blast furnace iron mouth, and then the valve of the oxygen source is opened and the valve opening is gradually increased until the metal oxygen burning pipe burns.

[0034] As a further solution of the blast furnace iron mouth oxygen burning operation method, after the blast furnace iron mouth is burned through, the valve of the oxygen source is closed, the first locking screw at the second through hole and the second locking screw at the third through hole are loosened, and the metal oxygen burning pipes on the second gantry and the third gantry are taken out; then the first gantry is pushed back to the skimmer position, and the first gantry and the second gantry are evacuated from the first rail and the third gantry is evacuated from the second rail, and finally, high-temperature resistant rubber skins are laid on the first rail and the second rail.

[0035] Beneficial effects of the present invention:

[0036] The use of the blast furnace iron mouth oxygen burning operation auxiliary tooling of the present invention can make the iron mouth oxygen burning operation process safe and easy. The operator does not need to stand in the high-temperature slag and iron area of ​​the main groove, which basically eliminates the safety risks of the operation. With the help of the blast furnace iron mouth oxygen burning operation auxiliary tooling, the iron mouth oxygen burning operation can be completed by only one person, reducing labor costs and labor intensity.

[0037] During the blast furnace iron mouth oxygen burning operation of the present invention, the metal oxygen burning pipe passes through the first through hole of the first gantry, the sleeve on the slag skimmer and the second through hole with the first locking screw of the second gantry or the third through hole with the second locking screw of the third gantry, and can be aligned with the center point of the blast furnace iron mouth, eliminating the phenomenon of burning the iron mouth off-center in the original oxygen burning operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive effort.

[0039] Figure 1 This is a schematic diagram of the existing blast furnace iron mouth oxygen burning operation.

[0040] Figure 2 This is a schematic diagram of the auxiliary tooling for the blast furnace iron mouth oxygen burning operation according to the first embodiment of the present invention.

[0041] Figure 3 Schematic diagram of the installation of the sleeve on the skimmer described in Example 1 of the present invention.

[0042] Figure 4 It is a schematic diagram of the first gantry described in Example 1 of the present invention.

[0043] Figure 1 middle:

[0044] 1', blast furnace; 2', main trench; 3', metal oxygen-burning pipe; 4', taphole; 5', slag skimmer; A, operator.

[0045] Figure 2-4 middle:

[0046] 100, blast furnace iron mouth; 200, main trench; 300, metal oxygen burning pipe;

[0047] 1. Casing; 2. Skimmer; 3. First track; 31. First limit buckle; 32. Second limit buckle; 4. First gantry; 41. First through hole; 5. Second gantry; 51. Second through hole; 6. Second track; 61. Third limit buckle; 7. Third gantry; 71. Third through hole; 8. First fixed pulley; 9. Second fixed pulley; 10. Frame. DETAILED DESCRIPTION

[0048] The technical solution of the present invention will be further described below with reference to the accompanying drawings and through specific implementation methods.

[0049] Among them, the drawings are only used for illustrative purposes and represent only schematic diagrams rather than actual pictures, and should not be understood as limiting this patent; in order to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0050] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "inside", "outside" and the like indicate an orientation or position relationship based on the orientation or position relationship shown in the drawings, it is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0051] In the description of the present invention, unless otherwise expressly specified or limited, when the term "connection" or the like appears to indicate a connection relationship between components, such term should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be internal communication between two components or an interaction between two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood in specific circumstances.

[0052] Example 1

[0053] like Figure 2-4 As shown, this embodiment provides an auxiliary tool for blast furnace iron mouth oxygen burning operation, including:

[0054] The casing 1 is fixed above the center of the skimmer 2, and the skimmer 2 is located in the main trench 200;

[0055] Two first rails 3 are located on both sides of the main groove 200 and extend along the length of the main groove 200, and a first gantry 4 and a second gantry 5 are slidably connected to the two first rails 3. The crossbeam of the first gantry 4 has a first through hole 41 formed at the center of its length. The crossbeam of the second gantry 5 has a second through hole 51 formed at the center of its length and a first locking hole extending through the wall of the second through hole 51. A first locking screw is installed in the first locking hole.

[0056] Two second rails 6 extending along the length of the main groove 200 are located on both sides of the main groove 200, and a third gantry 7 is slidably connected to the second rails 6. The crossbeam of the third gantry 7 is provided with a third through hole 71 and a second locking hole extending through the wall of the third through hole 71 at the center position along its length. A second locking screw is installed in the second locking hole.

[0057] The two first rails 3 are located between the two second rails 6, and the axes of the first through hole 41, the second through hole 51, the sleeve 1, and the third through hole 71 are all parallel to the horizontal plane, and the heights of the axes of the first through hole 41, the sleeve 1, the second through hole 51, and the third through hole 71 increase successively. The height of the axis of the first through hole 41 is higher than the center point of the outlet side of the blast furnace iron mouth 100.

[0058] This embodiment makes full use of the skimmer 2 on the main ditch 200, and fixes a sleeve 1 above the skimmer 2 through a support frame. At the same time, a relatively inner first track 3 and a relatively outer second track 6 are laid on the furnace table and on both sides of the main ditch 200, and a first gantry 4 and a second gantry 5 that can move along the first track 3 are set on the first track 3, and a third gantry 7 that can move along the second track 6 is set on the second track 6. A first through hole 41 is opened on the crossbeam of the first gantry 4, a second through hole 51 with a first locking screw is opened on the crossbeam of the second gantry 5, and a third through hole 71 with a second locking screw is opened on the crossbeam of the third gantry 7. The metal oxygen-burning tube 300 is respectively passed through the three through holes as a backup (the metal oxygen-burning tube 300 at the second through hole 51 is locked with the first locking screw, and the metal oxygen-burning tube 300 at the third through hole 71 is locked with the second locking screw). Then, the metal oxygen-burning tube 300 at the first through hole 41 passes through the sleeve 1 and docks with the metal oxygen-burning tube 300 at the second through hole 51. Since the metal oxygen-burning tube 300 at the second through hole 51 is locked with the first screw, the second gantry 5 and the metal oxygen-burning tube 300 can be pushed together to move toward the iron mouth 100 of the blast furnace. By pressing the second gantry 5, the metal oxygen-burning tube 300 is Always aligning with the center of the blast furnace iron mouth 100, the metal oxygen-burning tube 300 moves toward the channel of the blast furnace iron mouth 100 during combustion. When the second gantry 5 moves to the side of the slag skimmer 2, loosen the first locking screw, remove the metal oxygen-burning tube 300 at the first through hole 41, and dock it with the metal oxygen-burning tube 300 on the third gantry 7. Since the metal oxygen-burning tube 300 at the third through hole 71 is locked by the second screw, the third gantry 7 and the metal oxygen-burning tube 300 can be pushed together toward the blast furnace iron mouth 100, and the third gantry 7 is always pressed to make the metal oxygen-burning tube 300 press against the blast furnace iron mouth 100. Due to the height difference between the second gantry 5 and the third gantry 7, the second gantry 5 and the third gantry 7 can be used alternately to reduce the time of docking the metal oxygen-burning tube 300 and avoid the metal oxygen-burning tube 300 combustion being suspended for too long, which affects the oxygen-burning effect of the blast furnace iron mouth 100.

[0059] The three through holes and the sleeve 1 in this embodiment are all located at the center, so that the metal oxygen burning tube 300 can be aligned with the center point of the blast furnace iron mouth 100, eliminating the original phenomenon of oxygen burning being biased towards the iron mouth.

[0060] Since the metal oxygen-burning pipe rack 300 will bend to a certain extent after being installed on the gantry, in this embodiment, the heights of the axes of the first through hole 41, the sleeve 1, the second through hole 51, and the third through hole 71 are increased in sequence, and the height of the axis of the first through hole 41 is higher than the center point of the outlet side of the blast furnace iron mouth 100, so that the metal oxygen-burning pipe 300 can be aligned with the center point of the blast furnace iron mouth 100 after bending.

[0061] In addition, since the first track 3 and the second track 6 are a certain distance away from the main ditch 200, the operator can perform oxygen burning operations while standing in the non-high-temperature slag and iron area of ​​the main ditch 200, which basically eliminates the safety risks of the operation. The operation can be completed by only one person.

[0062] Furthermore, the end of the first rail 3 close to the blast furnace iron mouth 100 does not exceed the main groove 200. Specifically, the distance between the end of the first rail 3 close to the blast furnace iron mouth 100 and the blast furnace iron mouth 100 can be determined according to actual conditions; and each first rail 3 is provided with a first limit buckle 31 and a second limit buckle 32 at intervals along its length direction, the first limit buckle 31 is located at the end of the first rail 3 close to the blast furnace iron mouth 100, the second limit buckle 32 is adjacent to the slag skimmer 2, the first gantry 4 is located between the first limit buckle 31 and the second limit buckle 32, and the second gantry 5 is located on the side of the second limit buckle 32 away from the first limit buckle 31.

[0063] Among them, the second limit buckle 32 can be designed to be located exactly next to the slag skimmer 2. The operator only needs to push the second gantry 5 to move to the position of the second limit buckle 32, thereby preventing the operator from accidentally entering the high-temperature slag and iron area of ​​the main ditch 200 to operate, thereby improving the safety of oxygen burning operations.

[0064] Furthermore, the position of the first limiting buckle 31 does not exceed the landing point of the slag flowing out of the blast furnace iron mouth 100 during the normal slag tapping process of the blast furnace iron mouth 100.

[0065] Optionally, the end of the second rail 6 close to the blast furnace iron mouth 100 does not extend beyond the slag skimmer 2, and a third limit buckle 61 is provided at the end of each second rail 6 close to the blast furnace iron mouth 100. Specifically, the installation position of the third limit buckle 61 on the second rail 6 is consistent with the installation position of the second limit buckle 32 on the first rail 3. Both are located next to the slag skimmer 2, that is, in the non-high-temperature slag and iron area of ​​the main trench 200. Similarly, when the third gantry 7 is used, it can prevent operators from accidentally entering the high-temperature slag and iron area of ​​the main trench 200 for operation, thereby improving the safety of oxygen burning operations.

[0066] In this embodiment, the first limiting buckle 31, the second limiting buckle 32 and the third limiting buckle 61 can be baffle structures fixed on the track to limit the gantry from moving forward. The specific structure is not limited.

[0067] Furthermore, the height of the crossbeam of the third gantry 7 is 100-200 mm higher than that of the crossbeam of the second gantry 5, which can avoid interference between the second gantry 5 and the third gantry 7 during movement. In this embodiment, the height of the crossbeam of the third gantry 7 is 120 mm higher than that of the crossbeam of the second gantry 5.

[0068] In order to reduce the labor intensity of operators performing oxygen-burning operations, in this embodiment, a first fixed pulley 8 is respectively installed at the lower end of the support frame of the first gantry 4 and the second gantry 5, so that the first gantry 4 and the second gantry 5 are respectively connected to the first rail 3 in a rolling manner through the first fixed pulley 8, and a second fixed pulley 9 is respectively installed at the lower end of the support frame of the third gantry 7, so that the third gantry 7 is connected to the second rail 6 in a rolling manner through the second fixed pulley 9. The first fixed pulley 8 and the second fixed pulley 9 can be separated from the first rail 3 and the second rail 6 by lifting respectively.

[0069] The first track 3 and the second track 6 are similar to conventional train tracks. Optionally, the first track 3 and the second track 6 are recessed into the furnace platform. The widths of the first track 3 and the second track 6 are 30-50 mm, respectively. In this embodiment, the widths of the first track 3 and the second track 6 are both 40 mm. The first fixed pulley 8 is in rolling engagement with the first track 3, and the second fixed pulley 9 is in rolling engagement with the second track 6. Therefore, an operator can easily move the first gantry 4 and the second gantry 5 along the first track 3 and the third gantry 7 along the second track 6.

[0070] When the blast furnace iron mouth oxygen burning operation is not required in daily production, the first gantry 4, the second gantry 5 and the third gantry 7 are lifted upwards, so that the first fixed pulley 8 is separated from the first track 3 and the second fixed pulley 9 is separated from the second track 6, so that the first gantry 4, the second gantry 5 and the third gantry 7 can be lifted out of the track and placed separately.

[0071] Furthermore, the auxiliary tooling for the blast furnace iron mouth oxygen burning operation of this embodiment also includes a high-temperature resistant rubber skin (not shown in the figure). After the first fixed pulley 8 and the second fixed pulley 9 are separated from the first rail 3 and the second rail 6 respectively, the first gantry 4, the second gantry 5 and the third gantry 7 can be lifted out of the rail and placed separately, and then the high-temperature resistant rubber skin can be laid on the first rail 3 and the second rail 6 to prevent dust from accumulating on the first rail 3 and the second rail 6.

[0072] The auxiliary tooling for blast furnace iron mouth oxygen burning operation in this embodiment also includes a frame plate 10 installed on the furnace platform. The ends of the first track 3 and the second track 6 away from the blast furnace iron mouth 100 are respectively connected to the frame plate 10, and the frame plate 10 can also play a limiting role.

[0073] An embodiment of the present invention further provides a blast furnace iron mouth oxygen burning operation method, which uses the blast furnace iron mouth oxygen burning operation auxiliary tooling of the above embodiment. Specifically, the blast furnace iron mouth oxygen burning operation method of this embodiment includes the following steps:

[0074] S10, take 2-3 sections of metal oxygen burning pipe 300, connect them in sequence, and pass them through the casing 1 on the skimmer 2 and the first through hole 41 on the first gantry 4;

[0075] S20, push the first gantry 4 to the direction of the blast furnace taphole 100 to the position of the slag iron falling point from the blast furnace taphole 100 during the normal tapping process of the blast furnace taphole 100;

[0076] S30, a plurality of metal oxygen-burning tubes 300 are sequentially connected and pass through the second through hole 51 of the second gantry 5, and then a first locking screw is used for locking in standby mode; the metal oxygen-burning tube 300 on the second gantry 5 is connected with the metal oxygen-burning tube 300 on the first gantry 4 and the oxygen delivery hose (not shown in the figure) respectively, and the metal oxygen-burning tube 300 is opposite to and adjacent to the center point of the blast furnace taphole 100, and the oxygen delivery hose is connected with the oxygen source; the valve of the oxygen source is opened, and oxygen is introduced into the oxygen delivery hose, after the metal oxygen-burning tube 300 adjacent to the blast furnace taphole 100 is burned, the second gantry 5 is pushed to move towards the blast furnace taphole 100, so that the metal oxygen-burning tube 300 extends into the blast furnace taphole 100 and continues to burn;

[0077] S40, a plurality of metal oxygen-burning tubes 300 are sequentially connected and pass through the third through hole 71, and then a second locking screw is used for locking in standby mode; when the second gantry 5 moves to the slag skimmer 2, the first locking screw fixing the metal oxygen-burning tube 300 is loosened, the second gantry 5 is reversely pushed to retreat to the initial position, so that the metal oxygen-burning tube 300 is separated from the second gantry 5, and then the metal oxygen-burning tube 300 is connected with the metal oxygen-burning tube 300 on the third gantry 7; the valve of the oxygen source is closed, the oxygen delivery hose is connected with the metal oxygen-burning tube 300 on the third gantry 7, the valve of the oxygen source is opened, oxygen is introduced into the oxygen delivery hose, the third gantry 7 is pushed to move towards the direction close to the blast furnace taphole 100, so that the metal oxygen-burning tube 300 extends into the blast furnace taphole 100 and continues to burn; when the third gantry 7 moves to the slag skimmer 2, the second locking screw fixing the metal oxygen-burning tube 300 is loosened, the third gantry 7 is reversely pushed to retreat to the initial position, and the step S30 is repeated, the metal oxygen-burning tubes 300 on the second gantry 5 and the third gantry 7 are alternately connected, until the blast furnace taphole 100 is burned through.

[0078] Further, before step S10, it is also necessary to lift the high-temperature-resistant rubber skin covering the first track 3 and the second track 6, and install the first gantry 4 with the slag skimmer 2 close to the blast furnace taphole 100 as the starting point.

[0079] Specifically, in step S10, first take three sections of metal oxygen-burning pipes 300 and dock them, pass them through the sleeve 1 on the fixed support frame of the skimmer 2, and then pass them through the first through hole 41 on the first gantry 4, push the first gantry 4 toward the blast furnace iron mouth 100, and when the first fixed pulley 8 at the lower end of the first gantry 4 moves to the first limit buckle 31 at the front end, move the first gantry 4 on the inner first track 3 into place. Then dock the other metal oxygen-burning pipes 300, pass them through the second through hole 51 on the inner second gantry 5 and tighten them with the first locking screw, docking them with the metal oxygen-burning pipe 300 at the sleeve 1 above the skimmer 2, completing the installation of the metal oxygen-burning pipe 300. At this time, the metal oxygen-burning pipe 300 is facing the center point of the blast furnace iron mouth 100. Simultaneously, several sections of metal oxygen-burning pipes 300 are docked as backup. After the metal oxygen-burning pipe 300 is connected, an oxygen delivery hose connected to an oxygen source is connected to the end of the metal oxygen-burning pipe 300 away from the blast furnace iron mouth 100.

[0080] When burning oxygen, the temperature of the blast furnace iron mouth 100 channel is above 700°C and there are sparks. Therefore, you can first slowly open the oxygen valve of the oxygen source, introduce a very small amount of oxygen, and keep oxygen blowing out of the metal oxygen burning pipe 300. The oxygen encounters the sparks and high temperature at the blast furnace iron mouth 100 and starts to burn. As the combustion temperature rises, the oxygen flow rate is gradually increased. After the combustion of the metal oxygen burning pipe 300 is stable, start to press the inner second gantry 5 and move it toward the blast furnace iron mouth 100. The second gantry 5 drives the locked metal oxygen burning pipe 300 to move forward, and continues to press and move the second gantry 5 according to the combustion speed of the metal oxygen burning pipe 300 at the blast furnace iron mouth 100.

[0081] As the blast furnace iron mouth 100 oxygen burning operation proceeds, the metal oxygen burning pipe 300 extends into the channel of the blast furnace iron mouth 100, continuously generating high-temperature molten taphole mud in the channel of the blast furnace iron mouth 100, and blowing the molten taphole mud out of the iron mouth under the action of oxygen. The metal oxygen burning pipe 300 also continuously melts and shortens during the combustion process. When the inner second gantry 5 moves to the second limit buckle 32 at the slag skimmer 2, the second gantry 5 is returned to the initial starting position, the first locking screw is loosened, the metal oxygen burning pipe 300 at the second through hole 51 is removed, and the metal oxygen burning pipe 300 is quickly connected to the metal oxygen burning pipe 300 on the outer second track 6, then the valve of the oxygen source is closed, the oxygen delivery hose is connected to the metal oxygen burning pipe 300 on the third gantry 7, the valve of the oxygen source is opened, and the third gantry 7 is continued to move toward the slag skimmer 2 to burn the blast furnace iron mouth 100. According to the melting speed, the second gantry 5 and the third gantry 7 are cyclically and alternately replaced to move until the blast furnace iron mouth 100 is burned through.

[0082] In the early stage of the blast furnace iron mouth 100 burning through, the resistance in the channel of the blast furnace iron mouth 100 will be greatly reduced. When pushing the second gantry 5 or the third gantry 7 (herein referred to as the gantry) to move, the degree of the blast furnace iron mouth 100 burning through can be predicted according to the moving speed of the gantry under the same thrust: when the moving speed of the gantry increases rapidly, that is, the blast furnace iron mouth 100 is about to burn through, at this time, slowly close the valve opening of the oxygen source, reduce the amount of oxygen introduced by the burning oxygen, and control the red-hot combustion products and blown exhaust gas blown out from the blast furnace iron mouth 100 not to exceed the farthest blowing position in the previous burning oxygen process. When the blast furnace iron mouth 100 is burned through, slag iron flows out of the blast furnace iron mouth 100, close the valve of the oxygen source, loosen the locking screw at the corresponding through hole, and take out the metal burning oxygen pipe 300 behind the slag skimmer 2. Then withdraw the first gantry 4 on the first track 3 to the position of the skimmer 2, that is, close to the second limit buckle 32, take out the front end metal oxygen tube 300 from the sleeve 1 of the skimmer 2, then lift all the gantries out of the track, and lay high-temperature resistant rubber skin on the track.

[0083] During the oxygen burning process, oxygen is first burned from the outside of the blast furnace iron mouth 100 toward the inside of the iron mouth 100, toward the hearth. Initially, after the metal oxygen burning tube 300 burns, the oxygen flow rate is gradually increased. When the diameter of the expanded channel of the iron mouth 100 reaches 1 / 2 the diameter of the tapping mud inside the iron mouth channel, the oxygen flow rate and pressure increase are stopped. The gantry is then tightened to burn the iron mouth 100 inward. As the channel of the iron mouth 100 gradually melts deeper, the ejected high-temperature slag and gas continuously flush the channel of the iron mouth 100. Furthermore, as the length of the iron mouth 100 burned through gradually increases, the oxygen flow rate needs to be gradually reduced by controlling the valve opening. This ensures that the ejected gas flushing the outermost expansion hole of the iron mouth 100 does not exceed the maximum diameter of the tapping mud when the iron mouth 100 is blocked, preventing the ejected high-temperature gas from burning the brick lining and other refractory materials outside the iron mouth 100 channel. For example, after the taphole 100 of the blast furnace is blocked with taphole mud, the diameter of the taphole mud is 80 mm. The diameter after oxygen burning and expansion should be controlled to be less than 80 mm to ensure that the oxygen burning does not exceed the taphole mud blocking area. If it exceeds the taphole mud blocking area, the brick lining and other refractory materials outside the blast furnace taphole 100 will be burned.

[0084] The diameter of the metal oxygen burning pipe 300 is 20-32 mm, preferably not more than 1 / 3 of the diameter of the blast furnace iron mouth 100.

[0085] In this embodiment, the diameter of the metal oxygen burning tube 300 is 25 mm.

[0086] In this embodiment, the valve of the oxygen source is installed on the oxygen delivery hose and adjacent to the interface of the oxygen delivery hose, which is convenient for single-person operation.

[0087] Example 2

[0088] This embodiment is basically the same as the above-mentioned embodiment 1, except that:

[0089] 1) When burning oxygen, the temperature at the blast furnace taphole 100 is below 600°C and there is no spark. Place a ignited wooden stick at the center of the blast furnace taphole 100, slowly open the valve of the oxygen source to allow oxygen to be introduced for combustion assistance until the metal oxygen burning pipe 300 burns violently.

[0090] 2) This embodiment improves the auxiliary tooling for the blast furnace iron mouth oxygen burning operation on the basis of the above-mentioned embodiment 1 (the improved structure is not shown in the figure, this embodiment can refer to the drawings of embodiment 1, and the same component names use the same figure numbers).

[0091] Specifically, the auxiliary tooling for the blast furnace iron mouth oxygen burning operation of this embodiment also includes:

[0092] A first motor is mounted on the furnace platform and connected to a first fixed pulley 8 at the lower end of the first gantry 4 via a first chain. The outer periphery of the first fixed pulley 8 is provided with meshing teeth that mesh with the first chain. The first motor can drive the first gantry 4 to move along the length direction of the first track 3 via the first chain.

[0093] A second motor is mounted on the furnace platform and connected to the first fixed pulley 8 at the lower end of the second gantry 5 through a second chain. The outer periphery of the first fixed pulley 8 is provided with meshing teeth that mesh with the second chain. The second motor can drive the second gantry 5 to move along the length direction of the first track 3 through the second chain.

[0094] The third motor is installed on the furnace platform and is connected to the second fixed pulley 9 at the lower end of the third gantry 7 through the third chain. The outer periphery of the second fixed pulley 9 is provided with engaging teeth that engage with the third chain. The third motor can drive the third gantry 7 to move along the length direction of the second track 6 through the third chain.

[0095] In this embodiment, the gantry is driven to move by a motor, and no manual operation is required. The operator only needs to alternately connect the metal oxygen-burning pipes 300 on the second gantry 5 and the third gantry 7 .

[0096] Furthermore, the first motor, the second motor and the third motor are respectively connected to the controller, and the controller controls the start and stop of the first motor, the second motor and the third motor.

[0097] Furthermore, the valve of the oxygen source can also be set as an electric valve, which is connected to a controller, and the controller controls the opening of the electric valve to achieve regulation of the oxygen flow.

[0098] It should be noted that the above-described specific embodiments are merely preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will appreciate that various modifications, equivalent substitutions, and variations may be made to the present invention. However, as long as these modifications do not depart from the spirit of the present invention, they are intended to be within the scope of protection of the present invention. Furthermore, certain terms used in the specification and claims of this application are not intended to be limiting and are provided solely for ease of description.

Claims

1. A blast furnace iron mouth oxygen burning operation auxiliary tooling, characterized in that: include: a casing fixed above the center of the skimmer, the skimmer being located in the main trench; two first rails located on both sides of the main groove and extending along the length direction of the main groove, a first gantry and a second gantry slidably connected to the two first rails, a crossbeam of the first gantry having a first through hole formed at a center position along its length direction, a crossbeam of the second gantry having a second through hole formed at a center position along its length direction and a first locking hole extending through a wall of the second through hole, a first locking screw being installed in the first locking hole; Two second rails extending along the length of the main groove on both sides of the main groove and a third gantry slidably connected to the second rails, a third through hole and a second locking hole extending through the wall of the third through hole are formed at a center position of the crossbeam of the third gantry along its length, and a second locking screw is installed in the second locking hole; The two first rails are located between the two second rails, and the axes of the first through hole, the sleeve, the second through hole, and the third through hole are all parallel to the horizontal plane, and the heights of the axes of the first through hole, the second through hole, the sleeve, and the third through hole increase successively, and the height of the axis of the first through hole is higher than the center point of the outlet side of the blast furnace iron mouth.

2. The auxiliary tooling for blast furnace iron mouth oxygen burning operation according to claim 1, characterized in that: The end of the first rail close to the blast furnace iron mouth does not exceed the main groove, and each of the first rails is provided with a first limit buckle and a second limit buckle at intervals along its length direction. The first limit buckle is located at the end of the first rail close to the blast furnace iron mouth, and the second limit buckle is adjacent to the skimmer. The first gantry is located between the first limit buckle and the second limit buckle, and the second gantry is located on the side of the second limit buckle away from the first limit buckle.

3. The auxiliary tooling for blast furnace iron mouth oxygen burning operation according to claim 2, characterized in that: The position of the first limiting buckle does not exceed the landing point of the slag flowing out of the iron mouth during the normal slag tapping process of the blast furnace iron mouth.

4. The auxiliary tooling for blast furnace iron mouth oxygen burning operation according to claim 1, characterized in that: One end of the second rail close to the blast furnace iron mouth does not exceed the slag skimmer, and one end of each second rail close to the blast furnace iron mouth is provided with a third limiting buckle.

5. The auxiliary tooling for blast furnace iron mouth oxygen burning operation according to claim 1, characterized in that: The height of the crossbeam of the third gantry is 100-200 mm higher than the height of the crossbeam of the second gantry.

6. The auxiliary tool for blast furnace iron mouth oxygen burning operation according to any one of claims 1 to 5, characterized in that: The lower ends of the support frames of the first gantry and the second gantry are respectively rollingly connected to the first track via a first fixed pulley, and the lower end of the support frame of the third gantry is rollingly connected to the second track via a second fixed pulley, and the first fixed pulley and the second fixed pulley can be separated from the first track and the second track respectively.

7. The auxiliary tooling for blast furnace iron mouth oxygen burning operation according to claim 6, characterized in that: It also includes a high-temperature resistant rubber skin. After the first fixed pulley and the second fixed pulley are separated from the first track and the second track respectively, the high-temperature resistant rubber skin can be laid on the first track and the second track.

8. A blast furnace iron mouth oxygen burning operation method, characterized in that: The blast furnace iron mouth oxygen burning operation auxiliary tooling according to any one of claims 1 to 7 is used, and the blast furnace iron mouth oxygen burning operation method comprises the following steps: S10, take 2-3 sections of metal oxygen burning pipes, connect them in sequence, and pass them through the sleeve on the skimmer and the first through hole on the first gantry; S20, pushing the first gantry to move toward the blast furnace iron mouth to a position not exceeding and close to a position where slag flows out of the iron mouth during normal slag tapping of the blast furnace iron mouth; S30, taking a plurality of metal oxygen-burning pipes and docking them in sequence, and passing them through the second through holes of the second gantry, and then locking them with the first locking screw for standby use; the metal oxygen-burning pipes on the second gantry are respectively docked with the metal oxygen-burning pipes and the oxygen delivery hoses on the first gantry, and the metal oxygen-burning pipes are positioned directly opposite and adjacent to the center point of the blast furnace iron mouth, and the oxygen delivery hose is connected to an oxygen source; opening the valve of the oxygen source, and introducing oxygen into the oxygen delivery hose. After the metal oxygen-burning pipes adjacent to the blast furnace iron mouth are burning, the second gantry is pushed toward the blast furnace iron mouth, so that the metal oxygen-burning pipes extend into the blast furnace iron mouth and continue to burn; S40, take a number of metal oxygen-burning pipes and connect them in sequence, pass them through the third through hole, and then use the second locking screw to lock them for standby use; when the second gantry moves to the skimmer, loosen the first locking screw that fixes the metal oxygen-burning pipe, push the second gantry back to the initial position in the opposite direction, separate the metal oxygen-burning pipe from the second gantry, and then connect the metal oxygen-burning pipe with the metal oxygen-burning pipe on the third gantry; close the valve of the oxygen source, connect the oxygen delivery hose with the metal oxygen-burning pipe on the third gantry, and open Open the valve of the oxygen source, introduce oxygen into the oxygen delivery hose, push the third gantry to move toward the blast furnace iron mouth, and make the metal oxygen burning pipe extend into the blast furnace iron mouth and continue to burn; when the third gantry moves to the slag skimmer, loosen the second locking screw that fixes the metal oxygen burning pipe, push the third gantry in the reverse direction back to the initial position, return to step S30, and alternately dock the metal oxygen burning pipes pre-installed on the second gantry and the third gantry until the blast furnace iron mouth is burned through.

9. The blast furnace iron mouth oxygen burning operation method according to claim 8, characterized in that: In step S30, if the conditions are met at the passage of the blast furnace iron mouth: the temperature is above 700°C and there are sparks, then the valve opening of the oxygen source is adjusted to ensure that oxygen is blown out of the metal oxygen-burning tube. After the metal oxygen-burning tube burns, the valve opening of the oxygen source is gradually increased. If the conditions are not met at the passage of the blast furnace iron mouth, a burning fire source is placed at the center point of the blast furnace iron mouth, and then the valve of the oxygen source is opened and the valve opening is gradually increased until the metal oxygen-burning tube burns.

10. The blast furnace iron mouth oxygen burning operation method according to claim 8, characterized in that: After the iron mouth of the blast furnace is burned through, close the valve of the oxygen source, loosen the first locking screw at the second through hole and the second locking screw at the third through hole, and take out the metal oxygen burning pipes on the second gantry and the third gantry; then push the first gantry back to the skimmer position, and evacuate the first gantry and the second gantry from the first track and the third gantry from the second track, and finally lay high-temperature resistant rubber skins on the first track and the second track.

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