CN113701507B - Two-stage sectional brick scraping method for oxygen gun brick of metallurgical furnace - Google Patents
Two-stage sectional brick scraping method for oxygen gun brick of metallurgical furnace Download PDFInfo
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- CN113701507B CN113701507B CN202110859429.6A CN202110859429A CN113701507B CN 113701507 B CN113701507 B CN 113701507B CN 202110859429 A CN202110859429 A CN 202110859429A CN 113701507 B CN113701507 B CN 113701507B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D1/00—Casings; Linings; Walls; Roofs
- F27D1/16—Making or repairing linings increasing the durability of linings or breaking away linings
- F27D1/1694—Breaking away the lining or removing parts thereof
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Abstract
The two-stage sectional brick scraping method for the oxygen lance brick of the metallurgical furnace comprises the following steps: step one, before a smelting process, building oxygen lance bricks, surrounding bricks and at least one pair of process bricks in a metallurgical furnace hole, wherein the at least one pair of process bricks are tightly attached to the left side, the right side and/or the upper side and the lower side of the oxygen lance bricks, the refractory temperature of the process bricks is higher than that of the surrounding bricks, and the upper surfaces of the process bricks are higher than the upper surfaces of the surrounding oxygen lance bricks and the surrounding bricks; step two, after the smelting process is finished, pulling out all the process bricks through the upper parts of the process bricks higher than the upper surfaces of the oxygen lance bricks and the surrounding bricks by utilizing a primary brick pulling device to form at least one pair of oxygen lance brick pulling holes positioned on two sides of the oxygen lance bricks, wherein the oxygen lance brick pulling holes penetrate through the interior of the smelting furnace; and thirdly, extending the oxygen lance bricks and the surrounding bricks into the bottom of the metallurgical furnace through at least one pair of oxygen lance brick scraping holes by utilizing the secondary brick scraping device. Can pull out the oxygen lance brick completely by utilizing the brick pulling device, does not need to be broken and disassembled, reduces the labor intensity and has good brick pulling effect.
Description
Technical Field
The invention relates to the technical field of metallurgical furnace smelting auxiliary equipment, in particular to a two-stage sectional brick scraping method for oxygen lance bricks of a metallurgical furnace.
Background
The oxygen lance brick laying part of the metallurgical furnace consists of a perforated oxygen lance brick part with an intermediate oxygen lance penetrating into the furnace body and a surrounding brick part at the periphery. The oxygen lance bricks and the surrounding bricks are bonded together by forming bonding force when reaching the sintering temperature of the refractory materials in the smelting process, and meanwhile, the oxygen lance bricks are deformed into irregular shapes by the original small-diameter oxygen lance holes, so that great difficulty is caused to the replacement and the disassembly of the oxygen lance bricks and the surrounding bricks. At present, the breaking and disassembling methods such as a water drill, an electric hammer, an air pick and the like are basically adopted. The labor intensity is high, the breaking and disassembling time is long, the breaking and disassembling cost is high, and the production stopping period is long, so that huge economic loss is caused.
The patent with publication number CN 205383892U discloses a brick scraping machine for oxygen lance bricks of metallurgical furnaces, wherein the brick scraping technical scheme of the oxygen lance bricks is that a hammer rod hammer head device with an expansion sleeve and an expansion rod is adopted, the expansion sleeve is expanded by the expansion rod to be tensioned with brick holes, and then a sliding hammer head is used for applying force to pull out the oxygen lance bricks. Because the acting force generated by the sliding hammer is small, and the expansion sleeve is of a small taper structure, the tensile force effect generated by the expansion sleeve is limited, and the brick scraping effect on the oxygen gun bricks and the surrounding bricks sintered together is not achieved.
The patent with publication number CN 109870033B discloses a manual brick scraping machine which consists of a draw hook device for inserting into the brick holes of oxygen gun bricks, a force application device and a bracket for pushing the surrounding bricks around the oxygen gun bricks when the brick scraping machine is disassembled. The drag hook device comprises a drag hook mechanism which is used for going deep into the metallurgical furnace from a brick hole and a drag hook expanding mechanism which is used for enlarging the diameter of the part of the drag hook mechanism entering the metallurgical furnace so as to clamp the interior of the oxygen lance brick, the stress application device is connected with the drag hook mechanism, and the drag hook mechanism in the expanding state is axially moved through mechanical transmission, so that the oxygen lance brick is outwards moved, and the oxygen lance brick is pulled out from the surrounding brick. The patent with publication number CN 109945656B uses a double-piston rod hydraulic cylinder structure to replace manual force application on the basis that the drag hook device inserted into the brick hole of the oxygen lance brick is unchanged. Because the shape of the inner hole of the oxygen lance brick can cause the draw hook expanding mechanism to not pass through the inner hole of the oxygen lance brick to lose the normal efficacy due to sintering deformation, and meanwhile, the inner hole of the oxygen lance brick is too small to cause the bearing capacity of the draw hook device of the brick scraping machine to be insufficient, and the expected brick scraping effect can not be effectively achieved.
Disclosure of Invention
In order to solve the technical problems, the invention provides a two-stage sectional brick scraping method for an oxygen lance brick of a metallurgical furnace, which can completely pull out the oxygen lance brick by utilizing a brick scraping device, does not need to be broken and disassembled, reduces labor intensity and has good brick scraping effect.
In order to achieve the technical purpose, the adopted technical scheme is as follows: the two-stage sectional brick scraping method for the oxygen lance brick of the metallurgical furnace comprises the following steps:
step one, before a smelting process, building oxygen lance bricks, surrounding bricks and at least one pair of process bricks in a metallurgical furnace hole, wherein the at least one pair of process bricks are tightly attached to the left side, the right side and/or the upper side and the lower side of the oxygen lance bricks, the refractory temperature of the process bricks is higher than that of the surrounding bricks, and the upper surfaces of the process bricks are higher than the upper surfaces of the surrounding oxygen lance bricks and the surrounding bricks;
step two, after the smelting process is finished, the process bricks, surrounding oxygen lance bricks and surrounding bricks are not sintered, and all the process bricks are pulled out by utilizing a primary brick pulling device through the upper parts of the process bricks higher than the upper surfaces of the oxygen lance bricks and the surrounding bricks to form at least one pair of oxygen lance brick pulling holes positioned on two sides of the oxygen lance bricks, wherein the oxygen lance brick pulling holes penetrate through the interior of the smelting furnace;
and thirdly, extending the secondary brick scraping device into the bottom of the metallurgical furnace through at least one pair of oxygen lance brick scraping holes, and tightly grabbing the whole oxygen lance brick from the bottom and the periphery to pull out the oxygen lance brick and the surrounding brick together.
The process brick is made by adding pick elements into the surrounding brick independently, so that the refractory temperature of the process brick is higher than 1000 ℃ of the surrounding brick.
The primary brick scraping device comprises a vertical power mechanism, a process brick supporting mechanism and a process brick connecting mechanism, wherein the process brick supporting mechanism is arranged on the surrounding brick, the vertical power mechanism is arranged on the process brick supporting mechanism, one end of the vertical power mechanism is connected with the process brick connecting mechanism, and the process brick connecting mechanism is connected with the process brick.
The technical brick pulling holes for fixedly connecting the primary brick pulling device are transversely formed in the technical bricks which are higher than the upper surfaces of the oxygen lance bricks and the surrounding bricks.
The process brick supporting mechanism consists of a process brick support and leveling bolts, wherein the leveling bolts are uniformly arranged at the bottom of the process brick support and used for adjusting the leveling height to be in contact with the upper surface of the surrounding brick.
The process brick connecting mechanism consists of a pull claw clamped at the outer side of the upper part of the process brick and a pin rod penetrating through a brick scraping hole of the process brick, two ends of the pin rod are connected with the pull claw, and the pull claw is connected with the vertical power mechanism.
The secondary brick scraping device comprises a vertical power mechanism, a brick scraping machine supporting mechanism and an oxygen lance brick connecting mechanism, wherein the brick scraping machine supporting mechanism is fixedly connected with a metallurgical furnace flange, the vertical power mechanism is arranged on the brick scraping machine supporting mechanism, one end of the vertical power mechanism is connected with the oxygen lance brick connecting mechanism, the oxygen lance brick connecting mechanism stretches into the bottom of an oxygen lance brick inside the metallurgical furnace through an oxygen lance brick scraping hole, and the lower part of the oxygen lance brick connecting mechanism is clamped at the bottom of the oxygen lance brick to grasp the whole oxygen lance brick.
The vertical power mechanism comprises a worm wheel, a worm and a screw rod, wherein the worm is meshed with the worm wheel, the worm wheel is arranged on the screw rod through a thread connecting sleeve, and one end of the screw rod is used for being connected with the process brick connecting mechanism.
The brick scraping machine supporting mechanism consists of an oxygen lance brick support and connecting screws, and the oxygen lance brick support is fixed on a metallurgical furnace flange through the connecting screws.
The oxygen gun brick connecting mechanism consists of a push-pull rod, a first connecting rod, a paw and a second connecting rod, wherein the push-pull rod is connected with the vertical power mechanism, the left side and the right side of the push-pull rod are respectively provided with the first connecting rod, one end of the first connecting rod is matched with the push-pull rod to prop against the outer side of the push-pull rod when the push-pull rod is pulled up, the other end of the first connecting rod is hinged with the paw, one end of the second connecting rod is hinged with the paw, the other end of the second connecting rod is hinged with the push-pull rod, and the length of the second connecting rod is longer than that of the first connecting rod.
The invention has the beneficial effects that: the invention builds the process bricks, so that the metallurgical furnace does not form a sintering layer between the surrounding bricks and the process bricks in the smelting process, thereby not only facilitating the disassembly of the process bricks, but also directly tearing the sintering layer between the surrounding bricks after the disassembly of the process bricks, effectively reducing the disassembly pulling force of the oxygen lance bricks, and forming an inexpensive disassembly process channel for the disassembly of the oxygen lance bricks. In the whole dismantling process of the oxygen lance brick and the surrounding brick, the mechanical secondary brick scraping device produces a secondary tearing effect on the intermittent sintering layer of the surrounding brick, so that the pulling force required by the whole dismantling of the oxygen lance brick and the surrounding brick is greatly reduced, the labor intensity of a first-line worker is greatly reduced, the replacement and maintenance time of the oxygen lance brick is effectively shortened, and the smelting productivity and the production efficiency of a metallurgical furnace are improved. Compared with the traditional brick scraping method, the method reduces labor intensity, reduces breaking and dismantling time, saves breaking and dismantling cost, shortens production stopping period, improves labor environment, effectively improves the health level of first-line workers and reduces economic loss.
Drawings
FIG. 1 is a schematic diagram of the overall structure of a metallurgical furnace body and oxygen lance bricks according to the invention;
FIG. 2 is a schematic diagram of the installation structure of the primary brick scraping device of the invention;
FIG. 3 is a top view of FIG. 2;
FIG. 4 is a schematic diagram of the installation structure of the secondary brick scraping device of the invention;
FIG. 5 is a top view of FIG. 4;
in the figure: 1. oxygen lance brick, 2, surrounding brick, 3, process brick, 4, filler, 5, metallurgical furnace flange, 6, leveling bolt, 7, pin, 8, pull claw, 9, process brick support, 10, screw rod, 11, connecting screw a,12, ring gasket a,13, elastic washer, 14, lower shell, 15, tapered roller bearing a,16, connecting screw B,17, ring gasket B,18, elastic washer B,19, lip seal, 20, process brick hand wheel, 21, long rod, 22, screw rod protective sleeve, 23, cylindrical pin, 24, upper shell, 25, connecting bolt a,26, nut, 27, connecting bolt B,28, oxygen lance hand wheel, 29, inner hexagonal nut, 30, end cover, 31, tapered roller bearing, 32, screw rod, 33, worm gear, 34, sealing ring, 35, connecting screw C,36, oxygen lance brick support, 37, push-pull felt rod, 38, first connecting rod, 39, hand claw, 40, second connecting rod, 41, pin.
Detailed Description
The invention provides a two-stage sectional brick scraping technology and a brick scraping device formed by adopting an improved process structure aiming at the oxygen lance brick laying structure of a metallurgical furnace, wherein a plurality of process bricks 3 with the fire resistance temperature obviously higher than that of surrounding bricks 2 are arranged around the oxygen lance bricks 1, so that the process bricks 3 are ensured not to be sintered with other surrounding bricks in the smelting process of the metallurgical furnace. When the oxygen lance, the oxygen lance bricks 1 and the surrounding bricks 2 are replaced and removed, the primary brick removing device is utilized to remove the process bricks 3, so that sintering intermittent belts are generated between the surrounding bricks, a pair of oxygen lance brick removing holes penetrating through the inside of the smelting furnace are formed after the process bricks 3 are removed, and an effective removing process channel is provided for the secondary brick removing device (oxygen lance brick removing mechanism). Secondly, the oxygen lance bricks are outwards moved by using a practical and feasible secondary brick scraping device which is convenient for entering the brick scraping hole channel of the oxygen lance bricks in the metallurgical furnace body, so that the oxygen lance bricks and the surrounding bricks are integrally scraped out along the sintering intermittent belt. On the basis of forming the two-stage sectional brick raking technology provided by the invention, a manual process brick raking machine and a mechanical brick raking machine for integrally demolishing oxygen gun bricks and surrounding bricks by demolishing process channels into a metallurgical furnace are provided.
The invention firstly selects the process brick material with the fire-resistant temperature higher than the fire-resistant temperature of surrounding bricks by more than 1000 ℃ so as to prevent the sintering phenomenon between the oxygen gun brick and the process brick and between the process brick and the surrounding bricks.
The technical scheme of the metallurgical furnace oxygen lance brick laying technology is that at least 2-4 process bricks are laid around the oxygen lance bricks by taking the oxygen lance bricks as the center, two process bricks are in a pair, two process bricks 3 are respectively arranged at the left side and the right side or the upper side and the lower side of the oxygen lance bricks, the process bricks 3 are higher than the surfaces of other bricks for laying, then the metallurgical furnace is fully laid and sealed by surrounding bricks, and the edge gaps after the laying are filled by high-temperature resistant filler 4.
The technical scheme of detaching the oxygen lance bricks of the metallurgical furnace is that firstly, a primary brick-removing device is used for detaching process bricks respectively, then a secondary brick-removing device is used for detaching oxygen lance bricks with oxygen lance holes, along with the increase of detaching openings, the rest surrounding bricks are detached finally.
The two-stage sectional brick scraping method for the oxygen lance brick of the metallurgical furnace comprises the following steps:
step one, before a smelting process, building an oxygen lance brick 1, a surrounding brick 2 and at least one pair of process bricks 3 in a metallurgical furnace hole, wherein the at least one pair of process bricks 3 are tightly attached to the left side, the right side and/or the upper side and the lower side of the oxygen lance brick, the pair of process bricks are symmetrically arranged by the center line of the oxygen lance brick, the fire resistance temperature of the process bricks 3 is higher than that of the surrounding brick 2, and the upper surfaces of the process bricks 3 are higher than those of the surrounding oxygen lance bricks and the surrounding bricks, so that the process bricks 3 can be conveniently and rapidly pulled out;
step two, after the smelting process is finished, the process bricks, surrounding oxygen lance bricks and surrounding bricks are not sintered, and all the process bricks are pulled out by utilizing a primary brick pulling device through the upper parts of the process bricks higher than the upper surfaces of the oxygen lance bricks and the surrounding bricks to form at least one pair of oxygen lance brick pulling holes positioned on two sides of the oxygen lance bricks, wherein the oxygen lance brick pulling holes penetrate through the interior of the smelting furnace;
thirdly, the secondary brick scraping device is used for penetrating into the bottom of the oxygen lance bricks in the metallurgical furnace through a pair of oxygen lance brick scraping holes, the whole oxygen lance bricks are gripped from the bottom and the periphery, and the oxygen lance bricks and the surrounding bricks are pulled out together.
The process brick is made by adding pick elements into the surrounding brick independently, so that the refractory temperature of the process brick is higher than 1000 ℃ of the surrounding brick.
The primary brick scraping device comprises a vertical power mechanism, a process brick supporting mechanism and a process brick connecting mechanism, wherein the process brick supporting mechanism is placed on the surrounding bricks, the process brick supporting mechanism is not required to be fixed because the periphery of the process brick is not sintered, the volume of the whole primary brick scraping device is reduced, the vertical power mechanism is installed on the process brick supporting mechanism, one end of the vertical power mechanism is connected with the process brick connecting mechanism, the process brick connecting mechanism is connected with the process brick, the process brick is pulled out from the metallurgical furnace body by using lifting power provided by the vertical power mechanism, and the process brick connecting mechanism can adopt a conventional mechanical mechanism as long as the process brick can be ensured to be grabbed and not to be separated when being pulled out. The primary brick scraping device can be used for adjusting the position according to different positions of the process bricks, and is convenient to use.
The process brick supporting mechanism consists of a process brick support and leveling bolts, wherein the leveling bolts are uniformly arranged at the bottom of the process brick support and used for adjusting the leveling height to be in contact with the upper surface of the surrounding brick.
And a process brick scraping hole for fixedly connecting the primary brick scraping device is transversely formed in the process brick 3 higher than the upper surfaces of the oxygen lance bricks and the surrounding bricks. The process brick connecting mechanism consists of a pull claw 8 clamped on the outer side of the upper part of the process brick and a pin rod 7 penetrating through a brick scraping hole of the process brick, two ends of the pin rod 7 are connected with the pull claw 8, and the pull claw 8 is connected with the vertical power mechanism.
The concrete realization form of the first-stage brick scraping device is as follows: the process brick connecting mechanism comprises a pin rod 7 and a pull claw 8; the pin rod 7 is connected with the process brick 3, and the pin rod 7 is provided with a limiting pin, so that the pin rod 7 is prevented from falling off due to displacement when the process brick is pulled out; the pulling claw 8 is connected with the screw rod 10 by a connecting bolt B27, thereby driving the process brick 3 to be pulled out.
The process brick supporting mechanism comprises a process brick bracket 9 and a leveling bolt 6, wherein the process brick bracket 9 is placed on the surrounding bricks 2, leveling is carried out through the leveling bolt 6, and sufficient supporting force is ensured when the vertical power mechanism moves.
The vertical power mechanism comprises a worm and gear mechanism and a screw rod 10, wherein in the worm and gear mechanism, a tapered roller bearing B31, a felt sealing ring 34 and a lip sealing ring 19 are arranged on a worm 32. The tapered roller bearing B31 plays a role in fixing, the outer side of the tapered roller bearing B31 is provided with a hexagon nut 29 and an end cover 30 which are sleeved on a screw rod 32 for limiting and sealing, a felt sealing ring 34 and a lip sealing ring 19 play a role in dust blocking, the worm rod 32 is meshed with a worm wheel 33, the worm wheel 33 is connected with a screw rod 10 and coaxially arranged to drive the screw rod 10 to do vertical linear reciprocating motion, a process brick hand wheel 20 is connected with the worm rod 32, a long rod 21 is added on the process brick hand wheel 20 for limiting, and the long rod 21 is fixed through a cylindrical pin 23; the worm gear mechanism is arranged in a sealed shell, an upper shell 24 is fixedly connected with a lower shell 14 through a connecting bolt A25 and a nut 26, a connecting bolt B16 is connected, the lower shell 14 is fixed on a process brick support 9 through a connecting bolt A11, a circular ring gasket A12 and an elastic gasket 13, and the circular ring gasket A12 and the elastic gasket 13 are added to the connecting bolt A11 to play a role in preventing skidding and leakage. The screw rod 10 is connected with the worm wheel 33, a tapered roller bearing A15 is arranged between the worm wheel 33 and the shell, the screw rod 10 is driven to move through matched internal threads, a screw rod protecting sleeve is sleeved on the screw rod, and the screw rod protecting sleeve 22 is connected with the upper shell 24 through a connecting screw B16, a circular ring gasket B17 and an elastic gasket B18.
The working mode of the primary brick scraping device is as follows: the process brick hand wheel 20 rotates positively, and the screw rod 10 is driven to move downwards through the worm and gear mechanism, so that the pull claw 8 is close to the process brick 3, and is connected with the process brick 3 through the pin rod 7.
The technical brick hand wheel 20 is reversely applied with power to drive the worm wheel 33 to rotate, then the power is transmitted to the worm 32, the worm 32 is connected with the screw rod 10, when the worm wheel 33 rotates, the worm wheel 33 is connected with the screw rod 10 through threads, when the worm wheel 33 rotates, the internal threads simultaneously rotate, thereby driving the screw rod 10 to move up and down to convert the screw rod into the linear motion of the screw rod 10, and when the screw rod moves, the pulling claw 8 is driven to move, and as the pulling claw 8 is connected with the pin rod 7, the technical brick 3 is driven to be pulled out.
The secondary brick scraping device comprises a vertical power mechanism, a brick scraping machine supporting mechanism and an oxygen gun brick connecting mechanism, wherein the brick scraping machine supporting mechanism is fixedly connected with the metallurgical furnace flange 5, the oxygen gun brick is partially connected with a surrounding brick, and enough supporting force is needed, so that the oxygen gun brick supporting mechanism is connected with the metallurgical furnace flange 5, the vertical power mechanism is arranged on the brick scraping machine supporting mechanism, one end of the vertical power mechanism is connected with the oxygen gun brick connecting mechanism, the oxygen gun brick connecting mechanism extends into the bottom of the oxygen gun brick inside the metallurgical furnace through an oxygen gun brick scraping hole, the lower part of the oxygen gun brick connecting mechanism is clamped on the bottom of the oxygen gun brick to grasp the whole oxygen gun brick, and the oxygen gun brick connecting mechanism can be realized by adopting a universal claw-shaped connecting mechanism.
The vertical power mechanism comprises a worm wheel 33, a worm 32 and a screw rod 10, wherein the worm 32 is meshed with the worm wheel 33, the worm wheel 33 is arranged on the screw rod 10 through a thread connecting sleeve, and one end of the screw rod 10 is used for being connected with the process brick connecting mechanism.
The brick scraping machine supporting mechanism consists of an oxygen lance brick bracket 36 and a connecting screw C35, and the oxygen lance brick bracket 36 is fixed on the metallurgical furnace flange 5 through the connecting screw C35.
The oxygen gun brick connecting mechanism consists of a push-pull rod 37, a first connecting rod 38, a claw 39 and a second connecting rod 40, wherein the push-pull rod 37 is connected with a vertical power mechanism, the left side and the right side of the push-pull rod 37 are respectively provided with a first connecting rod, the first connecting rods are in clearance fit contact or not contact with the push-pull rod 37 when not subjected to force, one end of the first connecting rod 38 is matched with the push-pull rod 37 to prop up the outer side of the push-pull rod when pulled up, the other end of the first connecting rod 38 is hinged with the claw 39, one end of the second connecting rod 40 is hinged on the claw 39, the other end of the second connecting rod 40 is hinged on the push-pull rod 37, and the length of the second connecting rod 40 is longer than that of the first connecting rod 38.
The vertical power mechanism comprises a worm and gear mechanism and a screw rod 10, wherein in the worm and gear mechanism, a tapered roller bearing B31, a felt sealing ring 34 and a lip sealing ring 19 are arranged on a worm 32. The tapered roller bearing B31 plays a role in fixing, the outer side of the tapered roller bearing B31 is provided with a hexagon nut 29 and an end cover 30 which are sleeved on a screw rod 32 for limiting and sealing, a felt sealing ring 34 and a lip sealing ring 19 play a role in dust blocking, the worm rod 32 is meshed with a worm wheel 33, the worm wheel 33 is connected with a screw rod 10 and coaxially arranged to drive the screw rod 10 to do vertical linear reciprocating motion, a process brick hand wheel 20 is connected with the worm rod 32, a long rod 21 is added on the process brick hand wheel 20 for limiting, and the long rod 21 is fixed through a cylindrical pin 23; the worm gear mechanism is arranged in a sealed shell, an upper shell 24 is fixedly connected with a lower shell 14 through a connecting bolt A25 and a nut 26, a connecting bolt B16 is connected, the lower shell 14 is fixed on a process brick support 9 through a connecting bolt A11, a circular ring gasket A12 and an elastic gasket 13, and the circular ring gasket A12 and the elastic gasket 13 are added to the connecting bolt A11 to play a role in preventing skidding and leakage. The screw rod 10 is connected with the worm wheel 33, a tapered roller bearing A15 is arranged between the worm wheel 33 and the shell, the screw rod 10 is driven to move through matched internal threads, a screw rod protecting sleeve is sleeved on the screw rod, and the screw rod protecting sleeve 22 is connected with the upper shell 24 through a connecting screw B16, a circular ring gasket B17 and an elastic gasket B18.
The concrete implementation form of the secondary brick scraping device is as follows: the oxygen gun brick connecting mechanism consists of a push-pull rod 37, a first connecting rod 38, a claw 39 and a second connecting rod 40, wherein the push-pull rod 37 is connected with a vertical power mechanism, the left side and the right side of the push-pull rod 37 are respectively provided with a first connecting rod, the first connecting rods are in clearance fit contact or not contact with the push-pull rod 37 when not subjected to force, one end of the first connecting rod 38 is matched with the push-pull rod 37 to prop up the outer side of the push-pull rod when pulled up, the other end of the first connecting rod 38 is hinged with the claw 39, one end of the second connecting rod 40 is hinged on the claw 39, the other end of the second connecting rod 40 is hinged on the push-pull rod 37, the hinging is realized through a pin 41, and the length of the second connecting rod 40 is larger than that of the first connecting rod 38. When the first connecting rod 38 is stressed, the first connecting rod 38 is vertical to the push-pull rod 37, the claw 39 is attached to the surface of the oxygen lance brick according to the shape of the oxygen lance brick, the angle between the claw and the first connecting rod 38 is automatically adjusted, and the first connecting rod 38, the claw 39 and the second connecting rod 40 form a four-bar mechanism. The first connecting rod 38 is connected with the paw 39, and the paw 39 can be driven to take out the workpiece when the push-pull rod 37 moves; the second connecting rod 40 connects the push-pull rod 37 and the hand claw 39 at the same time, and when the push-pull rod 37 moves, the hand claw 39 is driven to clamp the workpiece, so that the workpiece cannot fall off.
The brick scraping machine supporting mechanism comprises an oxygen lance brick bracket 36 and a connecting screw C35; the oxygen lance brick bracket 36 is connected with the metallurgical furnace flange 5 through the connecting screw 35, the holding mechanism has enough supporting force when moving, and meanwhile, the oxygen lance brick bracket is connected with the vertical power mechanism by utilizing the connecting screw A11 to provide power, and the connecting screw A11 is added with the annular gasket A12 and the elastic gasket 13 to play a role of skid resistance and leakage resistance.
The vertical power mechanism comprises a worm and gear mechanism and a screw rod 10, wherein in the worm and gear mechanism, a tapered roller bearing B31, a felt sealing ring 34 and a lip sealing ring 19 are arranged on a worm 32. The tapered roller bearing B31 plays a role in fixing, the tapered roller bearing B31 is provided with a hexagon nut 29 and an end cover 30 which are sleeved on a screw rod 32, limiting and sealing are carried out, the felt sealing ring 34 and the lip sealing ring 19 play a role in dust blocking, the worm rod 32 is meshed with a worm wheel 33, the worm wheel 33 is connected with the screw rod 10 and coaxially arranged to drive the screw rod 10 to do vertical linear reciprocating motion, a push-pull rod 37 is connected with the screw rod 10 through threads, and a pull rod mechanism is driven to clamp and take out the oxygen gun brick 1. The oxygen lance brick hand wheel 28 is connected with the worm 32, and the oxygen lance brick hand wheel 28 is provided with a long rod 21 for limiting, and the long rod 21 is fixed through a cylindrical pin 23; the worm gear mechanism is arranged in a sealed shell, an upper shell 24 is fixedly connected with a lower shell 14 through a connecting bolt A25 and a nut 26, a connecting screw B16 is connected, and the lower shell 14 is fixed on the process brick support 9 through a connecting screw A11, a circular ring gasket A12 and an elastic gasket 13. The screw rod 10 is connected with a worm wheel 33, a tapered roller bearing A15 is arranged between the worm wheel 33 and the machine shell, the screw rod 10 is driven to move through matched internal threads, a screw rod protecting sleeve 22 is sleeved on the screw rod, and the screw rod protecting sleeve 22 is connected with the upper shell 24 through a connecting screw B16, a circular ring gasket B17 and an elastic gasket B18.
The working mode of the secondary brick scraping device is as follows: the oxygen gun brick hand wheel 28 rotates positively, the screw rod 10 is driven to move inwards through the worm and gear mechanism, the push-pull rod 37 and the first connecting rod 38 control the claw 39 to open when the screw rod moves, and the claw limits the rotating space when being perpendicular to the first connecting rod 38 due to the relation of the first connecting rod 38, so that the claw enters the metallurgical furnace through the brick scraping hole of the oxygen gun brick.
The oxygen lance brick hand wheel 28 is reversely applied with power to drive the worm wheel 33 to rotate, then the power is transmitted to the worm 32, the worm 32 is connected with the screw rod 10, when the worm wheel 33 rotates, the worm wheel 33 is connected with the screw rod 10 through threads, when the worm wheel 33 rotates, the internal threads simultaneously rotate, thereby driving the screw rod 10 to move up and down to convert the linear motion of the screw rod 10, driving the push-pull rod 37 to move, and when the push-pull rod 37 moves upwards, driving the second connecting rod 40 to move outwards, as the second connecting rod 40 is connected with the claw 39, when the second connecting rod 40 moves, driving the claw 39 to clamp the oxygen lance brick 1, when the push-pull rod 37 touches the first connecting rod 38, limiting the rotation of the claw 39, keeping the clamping force, and continuously moving outwards to drive the oxygen lance brick to move outwards, and as surrounding bricks are sintered together, the oxygen lance brick is sintered with the surrounding bricks, so that the oxygen lance brick 1 and the surrounding bricks are pulled out together.
Claims (8)
1. The two-stage sectional brick scraping method for the oxygen lance bricks of the metallurgical furnace is characterized by comprising the following steps of: based on the primary brick scraping device and the secondary brick scraping device;
the primary brick scraping device comprises a vertical power mechanism, a process brick supporting mechanism and a process brick connecting mechanism, wherein the process brick supporting mechanism is arranged on the surrounding brick;
the secondary brick scraping device comprises a vertical power mechanism, a brick scraping machine supporting mechanism and an oxygen lance brick connecting mechanism, wherein the brick scraping machine supporting mechanism is fixedly connected with a metallurgical furnace flange, the vertical power mechanism is arranged on the brick scraping machine supporting mechanism, one end of the vertical power mechanism is connected with the oxygen lance brick connecting mechanism, the oxygen lance brick connecting mechanism stretches into the bottom of an oxygen lance brick in the metallurgical furnace through an oxygen lance brick scraping hole, and the lower part of the oxygen lance brick connecting mechanism is clamped at the bottom of the oxygen lance brick to grip the whole oxygen lance brick;
the specific implementation method comprises the following steps:
step one, before a smelting process, building oxygen lance bricks, surrounding bricks and at least one pair of process bricks in a metallurgical furnace hole, wherein the at least one pair of process bricks are tightly attached to the left side, the right side and/or the upper side and the lower side of the oxygen lance bricks, the refractory temperature of the process bricks is higher than that of the surrounding bricks, and the upper surfaces of the process bricks are higher than the upper surfaces of the surrounding oxygen lance bricks and the surrounding bricks;
step two, after the smelting process is finished, the process bricks, surrounding oxygen lance bricks and surrounding bricks are not sintered, and all the process bricks are pulled out by utilizing a primary brick pulling device through the upper parts of the process bricks higher than the upper surfaces of the oxygen lance bricks and the surrounding bricks to form at least one pair of oxygen lance brick pulling holes positioned on two sides of the oxygen lance bricks, wherein the oxygen lance brick pulling holes penetrate through the interior of the smelting furnace;
thirdly, the secondary brick scraping device is used for penetrating into the bottom of the oxygen lance bricks in the metallurgical furnace through at least one pair of oxygen lance brick scraping holes, the whole oxygen lance bricks are gripped from the bottom and the periphery, and the oxygen lance bricks and the surrounding bricks are pulled out together.
2. The two-stage sectional brick scraping method for oxygen lance bricks of metallurgical furnace according to claim 1, wherein: the process brick is made by adding pick elements into the surrounding brick independently, so that the refractory temperature of the process brick is higher than 1000 ℃ of the surrounding brick.
3. The two-stage sectional brick scraping method for oxygen lance bricks of metallurgical furnace according to claim 1, wherein: the technical brick pulling holes for fixedly connecting the primary brick pulling device are transversely formed in the technical bricks which are higher than the upper surfaces of the oxygen lance bricks and the surrounding bricks.
4. The two-stage sectional brick scraping method for oxygen lance bricks of metallurgical furnace according to claim 1, wherein: the process brick supporting mechanism consists of a process brick support and leveling bolts, wherein the leveling bolts are uniformly arranged at the bottom of the process brick support and used for adjusting the leveling height to be in contact with the upper surface of the surrounding brick.
5. A two-stage staged brick pulling method for oxygen lance bricks of metallurgical furnace as defined in claim 3, wherein: the process brick connecting mechanism consists of a pull claw clamped at the outer side of the upper part of the process brick and a pin rod penetrating through a brick scraping hole of the process brick, two ends of the pin rod are connected with the pull claw, and the pull claw is connected with the vertical power mechanism.
6. The two-stage sectional brick scraping method for oxygen lance bricks of metallurgical furnace according to claim 5, wherein: the vertical power mechanism comprises a worm wheel, a worm and a screw rod, wherein the worm is meshed with the worm wheel, the worm wheel is arranged on the screw rod through a thread connecting sleeve, and one end of the screw rod is used for being connected with the process brick connecting mechanism.
7. The two-stage sectional brick scraping method for oxygen lance bricks of metallurgical furnace according to claim 1, wherein: the brick scraping machine supporting mechanism consists of an oxygen lance brick support and connecting screws, and the oxygen lance brick support is fixed on a metallurgical furnace flange through the connecting screws.
8. The two-stage sectional brick scraping method for oxygen lance bricks of metallurgical furnace according to claim 1, wherein: the oxygen gun brick connecting mechanism consists of a push-pull rod, a first connecting rod, a paw and a second connecting rod, wherein the push-pull rod is connected with the vertical power mechanism, the left side and the right side of the push-pull rod are respectively provided with the first connecting rod, one end of the first connecting rod is matched with the push-pull rod to prop against the outer side of the push-pull rod when the push-pull rod is pulled up, the other end of the first connecting rod is hinged with the paw, one end of the second connecting rod is hinged with the paw, the other end of the second connecting rod is hinged with the push-pull rod, and the length of the second connecting rod is longer than that of the first connecting rod.
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| KR20030030144A (en) * | 2001-10-08 | 2003-04-18 | 주식회사 포스코 | A method for partly repair refractory brick of converter |
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