CN109735679B - Device and method for replacing converter bottom blowing bricks and repairing gaps - Google Patents
Device and method for replacing converter bottom blowing bricks and repairing gaps Download PDFInfo
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- CN109735679B CN109735679B CN201811639429.XA CN201811639429A CN109735679B CN 109735679 B CN109735679 B CN 109735679B CN 201811639429 A CN201811639429 A CN 201811639429A CN 109735679 B CN109735679 B CN 109735679B
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Abstract
The invention discloses a device and a method for replacing a bottom-blown brick of a converter and repairing a gap, belonging to the technical field of converter steelmaking and aiming at solving the problem that refractory clay cannot uniformly fill the whole gap during gap repairing in the assembly process of the bottom-blown brick of the hot replacement. The device comprises a bottom blowing brick positioned at a drilling position of a brick cup of a furnace body, a gap repairing device, a blowing tank and a pressing disc, wherein the bottom blowing brick is a special-shaped refractory brick, a through hole penetrating through is formed in the center of the bottom blowing brick, the gap repairing device comprises a driven wheel and a driving wheel, at least two supporting rods are arranged on the driven wheel, a rolling wheel is arranged at the tail end of each supporting rod, a blowing pipe is arranged on the driven wheel, a blowing gun is arranged at the tail end of each blowing pipe, the other end of each blowing pipe is connected with the blowing tank, and a blowing carrier gas pipe is arranged in the blowing tank; the pressing plate is next to the driven wheel. The method comprises the steps of drilling holes, installing bottom blowing bricks, installing a gap repairing device, repairing, blowing and sintering. The gap repairing method and the matched equipment used by the invention provide safety guarantee for the on-line hot replacement of the bottom blowing brick, and have obvious economic benefit.
Description
Technical Field
The invention belongs to the technical field of converter steelmaking, and particularly relates to a device and a method for replacing a bottom blowing brick of a converter and repairing a gap.
Background
The converter top and bottom combined blowing technology has become an indispensable technical means for converter steelmaking, the bottom blowing air brick is a core for realizing the combined blowing technology of the converter, the good bottom blowing using effect is a key for guaranteeing the metallurgical effect of the combined blowing converter, the bottom blowing effect is a key index for evaluating the production control of the top and bottom combined blowing converter, the normal bottom blowing effect is matched with a top blowing oxygen lance for supplying oxygen, the best stirring effect of a metallurgical molten pool can be realized, the stable smelting process is ensured, the splashing is reduced, the C-O product of the final molten steel is close to a theoretical value, the uniformity of components and temperature is improved, the residual oxygen content in steel is reduced, the FeO content in slag is reduced, and the cost is reduced.
With the improvement of converter smelting technology, the furnace lining maintenance technology is obviously improved, the average furnace age of a converter is greatly increased, the average level exceeds 15000 furnaces, but the service life of bottom blowing bricks is not obviously improved, so that the converter cannot realize bottom blowing of the whole furnace service.
The invention patent 201521117020.3 discloses a drilling machine for replacing air bricks in a converter bottom blowing hot state, which comprises a motor, a hollow drill bit, a coupler, a ball screw, a slideway, a dust cover, a motor base and the slideway, wherein a nut of the ball screw is fixed at one end of the slideway, one end of the ball screw is fixedly provided with a feeding rocker wheel, the other end of the ball screw is axially fixed with the motor base and radially rotates relatively, the lower end of the hollow drill bit is provided with the dust cover, the feeding rocker wheel is arranged at the tail part of the drilling machine, the potential safety hazard during operation is eradicated, the ball slideway is adopted to effectively improve the drilling precision, the dust cover is additionally arranged to improve the operation construction condition, the civilization production is realized, the common motor is changed into a frequency modulation motor, the key parts such as various complicated working conditions and the coupler are selected from high-strength materials, and the durability of the whole device is greatly improved.
The invention patent 201210164923.1 discloses a quick heat exchange method of a converter bottom blowing air brick, a special drilling machine and an air brick, and the quick heat exchange method is characterized in that the adopted air core brick is formed by connecting an upper section, a middle section and a lower section, the protective sleeve brick is formed by connecting an upper sleeve brick and a lower sleeve brick, the upper sleeve brick is a magnesia carbon brick, the lower sleeve brick is corundum castable, the protective sleeve brick is sleeved outside the air core brick, a furnace bottom flange is welded at a furnace bottom opening, the furnace bottom flange is connected with the special drilling machine, the quick heat exchange method comprises the steps of preparing the air core brick, the protective sleeve brick, the furnace bottom flange, a cylinder flange and the drilling machine, removing the old air brick, cleaning the lower sleeve brick cone frustum part of the protective sleeve brick, drilling by the drilling machine, installing the air brick, and connecting a tail pipe.
According to the method, through the method of hot replacement of the bottom blowing bricks, the service lives of the plurality of bottom blowing bricks are consistent with the service life of the converter, so that the whole process of the converter in service can be performed through bottom blowing, but in the method, no safe and feasible method is adopted for repairing gaps in the process of assembling the bottom blowing bricks, the gaps are eliminated in a manner of smearing refractory clay, the length of a base blowing brick of the converter is basically about 1.5m, the refractory clay is easy to accumulate in the assembling process, the refractory clay at a local position is lost, once the refractory clay cannot uniformly fill the whole gaps, channels are formed between the base bricks and the bottom blowing bricks, and steel seepage and even malignant steel penetration accidents can be caused in the follow-up process.
Disclosure of Invention
The invention aims to provide a device for replacing a bottom blowing brick of a converter and repairing a gap, which aims to solve the problem that refractory clay cannot uniformly fill the whole gap during gap repairing in the assembly process of the bottom blowing brick in hot replacement.
The invention further aims to provide a method for replacing the bottom blowing bricks of the converter and repairing the gaps, which aims to solve the problem that the repairing of the gaps in the assembly process of the bottom blowing bricks lacks a safe and feasible mechanical operation method.
In order to solve the problems, the technical scheme of the invention is as follows:
the device comprises a bottom blowing brick positioned at a drilling position of a brick cup of a furnace body, a gap repairing device, a blowing tank and a pressing disc, wherein the bottom blowing brick is a special-shaped refractory brick, a through hole penetrating through the center of the bottom blowing brick is formed in the bottom blowing brick, the bottom blowing brick comprises a round platform part and a cylindrical part, the round platform part is small at the upper part and large at the lower part, the bottom diameter of the round platform part is equal to the diameter of the drilling hole, and the diameter of the cylindrical part is smaller than the diameter of the drilling hole; the gap repairing device comprises a driven wheel and a driving wheel, wherein at least two supporting rods are arranged on the driven wheel, a rolling wheel is arranged at the tail end of each supporting rod, a spraying pipe is arranged on the driven wheel, a spraying gun is arranged at the tail end of each spraying pipe, the other end of each spraying pipe is connected with a spraying tank, and the spraying tank is provided with a spraying carrier gas pipe; the pressing plate is next to the driven wheel.
Further, the middle part of the driven wheel is provided with a rotating head, the inner side of the pressing disc is connected with the rotating head through a bearing, and the blowing pipe penetrates through the rotating head to be connected with the blowing tank.
Further, the bottom of the blowing tank is provided with a fluidizer.
Further, a limiting plate is arranged below the pressing disc, a hydraulic rod is arranged between the pressing disc and the limiting plate, and the hydraulic rod is connected with a power device.
Further, the diameter of the cylindrical portion is 15-mm-25 mm smaller than the diameter of the bore.
Furthermore, one side of the driven wheel is meshed with a driving wheel, a power transmission shaft is arranged on the driving wheel, and the power transmission shaft is used for being connected with a motor to realize power driving.
Further, a purge pipe is also arranged at the position of the blowing pipe close to the blowing tank.
Further, the supporting rod and the upper end of the blowing pipe are arranged in the same fixing ring.
A method for replacing a converter bottom blowing brick and repairing a gap comprises the following steps:
A. drilling:
prefabricating a bottom blowing brick according to the diameter of a drilled hole, drilling the bottom blowing brick to be repaired, wherein the diameter of the drilled hole is equal to the bottom diameter of a round platform part of the bottom blowing brick;
B. installing a bottom blowing brick:
the front end of the round table part is coated with refractory mortar, the bottom blowing brick is jacked into a preset position by jacking equipment, the front end of the round table part is flush with the top of the drilling hole, the bottom diameter side part of the round table part is tightly attached and sealed with the drilling hole, the cylindrical part is adjusted, and the equal gap between the cylindrical part and the drilling hole is ensured;
C. installation clearance repair device:
the grinding wheel and the spray gun are penetrated into a gap between the cylindrical part and the drill hole by utilizing the driven wheel, the supporting rod and the spray gun, and the position of the limiting plate is adjusted, so that when the limiting plate is matched and positioned with the hydraulic rod, the gap repairing device above the pressing disc is ensured to have enough space to withdraw;
D. repairing:
opening a blowing pipe, spraying materials in a blowing tank into a gap between a cylindrical part and a drill hole, controlling the flow speed to be not more than 0.5kg/min, simultaneously opening a power device of a driving wheel, starting rotation of a driven wheel, driving a gunning gun to spray a gunning edge and turn, rolling a roller to roll the materials sprayed by the gunning gun, gradually downwards moving and withdrawing the whole gap repairing device under the reverse thrust of the roller along with compaction and superposition of the sprayed materials, keeping the pressure of a hydraulic rod constant, ensuring the pressure consistency of the whole gunning process, and finishing gunning operation when the position of the gunning gun is level with the bottom surface of a brick cup of a converter; turning off the blowing pipe and the power device;
E. and (3) purging and sintering:
after the gunning is finished, the purging pipe is opened to purge the residual materials in the blowing pipe, the furnace body temperature is used for sintering the gunning materials for more than 60 minutes, and then the normal smelting link is entered.
The beneficial effects of the invention are as follows:
(1) According to the invention, the special-shaped bottom-blowing brick and the matched gap repairing device are utilized to realize quick hot replacement of the bottom-blowing brick, as the round platform part of the bottom-blowing brick is small in upper part and large in lower part, and the bottom diameter of the round platform part is equal to the diameter of a drilling hole, after the round platform part is jacked into a preset position by a jacking device, the front end of the round platform part is tightly matched with the drilling hole to form a seal, the diameter of the cylindrical part of the bottom-blowing brick is smaller than that of the drilling hole, the gap repairing device is convenient to repair deeply, the driven wheel is round, and the supporting rod and the blowing pipe can further position the bottom-blowing brick after penetrating deeply, so that the gap between the supporting rod and the furnace body brick seat is equidistant, and the gap after repair is firmer; the material in the blowing tank is blown into the gunning gun by the blowing carrier pipe, the gunning gun sprays into the gap, the rolling wheel rolls the material, the whole blowing and rolling operation is carried out by driving the driven wheel, the gap is fully filled, and the high strength and the binding force are formed by repeatedly rolling, so that the hollow caused by uneven or missing smearing of the traditional filling local material is avoided; with the increase of the sprayed materials, the filled materials give an outward thrust to the roller so that the whole gap repairing device moves outwards in a spiral line, and under the condition that the constant pressure is kept on the pressing disc, the pressure applied by the gunning gun and the roller to the materials in the working process is always consistent, so that the filled materials in the whole gap repairing operation are ensured to be even and smooth until the position of the roller is level with a brick cup of a furnace body, and the gap repairing operation is finished;
(2) The fluidizer increases the fluidity of the material, so that the material can be smoothly and uniformly sprayed out of the spraying tank; the arrangement of the rotary head is matched with the bearing to connect the pressing disc, the blowing pipe penetrates through the rotary head, by the arrangement mode, the free rotation of the driven wheel is realized under the condition that the pressing disc is fixed, the rolling wheel and the gunning gun are driven to work, and the pressing disc is easier to pressurize and keep the pressure constant when fixed;
(3) The limiting plate and the hydraulic rod are matched to realize constant pressure maintenance on the compression disc, and the relative position of the compression disc is controlled through the expansion and contraction of the hydraulic rod, so that the penetration and withdrawal of the gap repairing device are further controlled; the diameter of the cylindrical part is 15-mm-25 mm smaller than the diameter of the drilled hole, the gap is too small, so that the repair operation is not facilitated, the gap is large, the repair part is better in repair, the durability is poorer than that of a one-time formed bottom-blowing brick, the gap is the most suitable gap interval, the easy completion of the operation and the uniformity of compaction are both considered while the gap is minimized, and the firmness and the durability of the whole repair are ensured;
(4) The driving wheel provides power for the driven wheel, and the power transmission shaft can be connected with various power equipment; the purging pipe helps to complete the cleaning work of residual materials in the repaired blowing pipe, so that the residual materials are prevented from blocking the blowing pipe, and the service life of the blowing pipe is shortened; the upper ends of the supporting rod and the blowing pipe are arranged in the same fixed ring, so that the function of positioning the tail end is better achieved;
(5) According to the method, special equipment is matched, the flow rate of materials in the blowing pipe is controlled within a reasonable range, the number of rolling turns of the rolling wheel is small under the condition of too high flow rate, the rolling wheel is not easy to compact, the repairing effect is affected, the waiting sintering time after the repairing is finished is critical, and the sintering effect is not ideal below 60 min;
(6) The gap repairing method and the matched equipment used by the invention utilize gunning as a technical means, and through special gap repairing, the material can be sprayed into a narrow gap formed by the brick cup and the bottom blowing brick, and the sprayed material is repeatedly rolled by the rolling wheel, so that the bonding strength of the material, the brick cup and the bottom blowing brick is greatly improved, the gunning position has higher strength, the intermittent mud breaking caused by directly and manually smearing the fire clay is eliminated, the risk of steel leakage caused by heat exchange of the bottom blowing brick of the high-capacity converter is avoided, the safety guarantee is provided for the online heat exchange of the bottom blowing brick, and the method has obvious economic benefit.
Drawings
FIG. 1 is a schematic structural view of a device for replacing bottom blowing bricks and repairing gaps of a converter;
FIG. 2 is a top plan view of the installation of the positioning plate in the device for replacing the bottom blowing bricks and repairing the gaps of the converter;
FIG. 3 is a schematic structural view of a gap repairing device in a converter bottom blowing brick replacement and gap repairing device;
FIG. 4 is a schematic view showing installation of bottom-blown bricks in an apparatus for replacing bottom-blown bricks of a converter and repairing gaps.
The reference numerals are as follows: 1. a converter body; 11. furnace body seat bricks; 2. bottom blowing bricks; 21. a round table part; 22. a cylindrical portion; 23. a through hole; 3. gap repairing device; 31. driven wheel; 32. a driving wheel; 33. a rotating head; 34. a rolling wheel; 35. a gunning gun; 36. a power transmission shaft; 37. a support rod; 38. a blowing pipe; 4. a blowing tank; 41. a fluidizer; 42. blowing a gas carrying pipe; 5. a pressing plate; 51. a bearing; 6. a limiting plate; 61. a hydraulic rod; 62. a power device; 7. purge tube.
Detailed Description
The present invention will be described in further detail with reference to the drawings and detailed description.
1-4, a converter bottom blowing brick replacement and gap repair device comprises a bottom blowing brick 2 positioned at a drilling position of a furnace body brick cup 11, a gap repair device 3, a blowing tank 4 and a compacting disc 5, wherein the bottom blowing brick 2 is a special-shaped refractory brick, a through hole 23 penetrating through is formed in the center of the bottom blowing brick 2, the bottom blowing brick 2 comprises a round platform part 21 and a cylindrical part 22, the round platform part 21 is small at the top and large at the bottom, the bottom diameter of the round platform part 21 is equal to the drilling diameter, and the diameter of the cylindrical part 22 is smaller than the drilling diameter; the diameter of the cylindrical part 22 is 15-mm-25 mm smaller than the diameter of the drilled hole, the gap repairing device 3 comprises a driven wheel 31, a driving wheel 32 and a rotating head 33, at least two supporting rods 37 are arranged on the driven wheel 31, a rolling wheel 34 is arranged at the tail end of each supporting rod 37, a spraying pipe 38 is arranged on the driven wheel 31, a spraying gun 35 is arranged at the tail end of each spraying pipe 38, the supporting rods 37 and the upper end of each spraying pipe 38 are arranged in the same fixed ring, and a spraying carrier air pipe 42 is arranged on the spraying tank 4; the bottom of the blowing tank 4 is provided with a fluidizer 41, the compaction disc 5 is close to the driven wheel 31, the inner side of the compaction disc 5 is connected with the rotary head 33 through a bearing 51, the other end of the blowing pipe 38 penetrates through the rotary head 33 to be connected with the blowing tank 4, the position, close to the blowing tank 4, of the blowing pipe 38 is also provided with a blowing pipe 7, a limiting plate 6 is arranged below the compaction disc 5, a hydraulic rod 61 is arranged between the compaction disc 5 and the limiting plate 6, and the hydraulic rod 61 is connected with a power device 62.
Example 1:
a method for replacing a converter bottom blowing brick and repairing a gap, comprising the following steps: (the method adopts the device for replacing the converter bottom blowing brick and repairing the gap to test.)
The steps are as follows:
A. drilling:
according to the diameter of the drilled holes, the bottom blowing bricks 2 are prefabricated, the diameter of the drilled holes determined by the bottom blowing bricks blocked by the 80 ton converter in the embodiment is 130mm, so that the bottom diameter of the round platform part 21 of the prefabricated bottom blowing bricks 2 is 130mm, and the height of the round platform part 21 is 50mm; the diameter of the cylindrical portion 22 is 110mm; the brick cup 11 to be repaired is drilled, and the diameter of the drilled hole is equal to the bottom diameter of the round platform part 21 of the bottom blowing brick 2.
B. Installing a bottom blowing brick and a gap repairing device:
the side part of the round table part 21 is coated with refractory mortar, the cylindrical part 22 is clamped into the supporting rod 37 and the fixing ring, the rolling wheel 34 is propped against the bottom edge of the round table part 21, and the position of the limiting plate 6 is adjusted, so that when the limiting plate is matched with the hydraulic rod 61 for positioning, the gap repairing device 3 above the pressing disc 5 is ensured to have enough space to withdraw; the power device 62 is pressurized, the hydraulic rod 61 is lifted, the bottom blowing brick 2 is pushed to a preset position at the end of the drilling hole, the front end of the round platform part 21 is flush with the top of the drilling hole, the gap between the round platform part 22 and the drilling hole is filled with fire clay smeared in advance, the bottom diameter side part of the round platform part 21 is tightly attached and sealed with the drilling hole, the gap between the cylindrical part 22 and the brick cup 11 is finely adjusted, and the equal gap between the cylindrical part 22 and the drilling hole is ensured; ensuring that the gun 35 and roller 34 can rotate flexibly.
C. Repairing:
opening a blowing pipe 38, spraying the material in the blowing tank 4 into a gap between the cylindrical part 22 and a drill hole, controlling the flow speed to be 0.3kg/min, simultaneously opening a power device of a driving wheel 32, starting rotation of a driven wheel 31, driving a gunning gun 35 to spray and rotate, rolling the material sprayed by the gunning gun 35 by a rolling wheel 34, gradually downwards moving and withdrawing the whole gap repairing device 3 under the reverse thrust of the rolling wheel 34 along with compaction and superposition of the sprayed material, keeping the pressure of a hydraulic rod 61 constant, ensuring the consistency of the pressure of the whole gunning process, and finishing the gunning operation when the position of the gunning gun 35 is level with the bottom surface of a converter brick cup; the lance tube 38 and the power unit 62 are turned off.
D. And (3) purging and sintering:
after the gunning is finished, the purging pipe 7 is opened to purge the residual materials in the blowing pipe 38, the standby is carried out for 90 minutes, the gunning materials are sintered by utilizing the temperature of the furnace body, and then the normal smelting link is entered.
Example 2
A. Drilling:
according to the diameter of the drilled holes, the bottom blowing bricks 2 are prefabricated, the diameter of the drilled holes determined by the bottom blowing bricks blocked by the 120 ton converter in the embodiment is 180mm, so that the bottom diameter of a round platform part 21 of the prefabricated bottom blowing bricks 2 is 180mm, and the height of the round platform part 21 is 80mm; the diameter of the cylindrical portion 22 is 150mm; the brick cup 11 to be repaired is drilled, and the diameter of the drilled hole is equal to the bottom diameter of the round platform part 21 of the bottom blowing brick 2.
B. Installing a bottom blowing brick:
the refractory clay is smeared at the front end of round platform portion 21, utilizes top income equipment to push into predetermined position with bottom blowing brick 2, and the front end of round platform portion 21 flushes with the drilling top, and the bottom footpath lateral part of round platform portion 21 is closely laminated with the drilling and is sealed, adjusts cylinder portion 22, guarantees that the clearance between cylinder portion 22 and the drilling is equal.
C. Installation clearance repair device:
the grinding wheel 34 and the gunning gun 35 are deeply penetrated into the gap between the cylindrical part 22 and the drilled hole by the driven wheel 31, the supporting rod 37 and the jetting pipe 38, and the position of the limiting plate 6 is adjusted, so that when the limiting plate is matched with the hydraulic rod 61 for positioning, the gap repairing device 3 above the pressing disc 5 is ensured to have enough space to withdraw.
D. Repairing:
opening a blowing pipe 38, spraying the material in the blowing tank 4 into a gap between the cylindrical part 22 and a drill hole, controlling the flow speed to be 0.48kg/min, simultaneously opening a power device of a driving wheel 32, starting rotation of a driven wheel 31, driving a gunning gun 35 to spray and rotate, rolling the material sprayed by the gunning gun 35 by a rolling wheel 34, gradually downwards moving and withdrawing the whole gap repairing device 3 under the reverse thrust of the rolling wheel 34 along with compaction and superposition of the sprayed material, keeping the pressure of a hydraulic rod 61 constant, ensuring the consistency of the pressure of the whole gunning process, and finishing the gunning operation when the position of the gunning gun 35 is level with the bottom surface of a converter brick cup; the lance tube 38 and the power unit 62 are turned off.
E. And (3) purging and sintering:
after the gunning is finished, the purging pipe 7 is opened to purge the residual materials in the blowing pipe 38, the standby is carried out for 65 minutes, the gunning materials are sintered by utilizing the temperature of the furnace body, and then the normal smelting link is entered.
Claims (8)
1. The utility model provides a converter bottom blowing brick change and clearance restoration's device, includes bottom blowing brick (2) that are located furnace body pocket brick (11) drilling department, its characterized in that: the bottom blowing brick machine is characterized by further comprising a gap repairing device (3), a blowing tank (4) and a pressing disc (5), wherein the bottom blowing brick (2) is a special-shaped refractory brick, a through hole (23) penetrating through the center of the bottom blowing brick (2) is formed, the bottom blowing brick (2) comprises a round table part (21) and a cylindrical part (22), the round table part (21) is small in upper part and large in lower part, the bottom diameter of the round table part (21) is equal to the diameter of a drilled hole, and the diameter of the cylindrical part (22) is 15-mm mm smaller than the diameter of the drilled hole; the gap repairing device (3) comprises a driven wheel (31) and a driving wheel (32), wherein at least two supporting rods (37) are arranged on the driven wheel (31), a rolling wheel (34) is arranged at the tail end of each supporting rod (37), a spraying pipe (38) is arranged on the driven wheel (31), a spraying gun (35) is arranged at the tail end of each spraying pipe (38), the other end of each spraying pipe (38) is connected with a spraying tank (4), and a spraying carrier air pipe (42) is arranged on each spraying tank (4); the pressing disk (5) is next to the driven wheel (31).
2. A converter bottom-blown brick replacement and gap repair apparatus according to claim 1, wherein: the middle part of the driven wheel (31) is provided with a rotating head (33), the inner side of the pressing disc (5) is connected with the rotating head (33) through a bearing (51), and the blowing pipe (38) penetrates through the rotating head (33) to be connected with the blowing tank (4).
3. A device for replacing bottom-blown bricks and repairing gaps of a converter according to claim 1 or 2, characterized in that: the bottom of the blowing tank (4) is provided with a fluidizer (41).
4. A converter bottom-blown brick replacement and gap repair apparatus according to claim 3, wherein: the hydraulic pressing device is characterized in that a limiting plate (6) is arranged below the pressing disc (5), a hydraulic rod (61) is arranged between the pressing disc (5) and the limiting plate (6), and the hydraulic rod (61) is connected with a power device (62).
5. The device for replacing and repairing the bottom blowing brick of the converter as claimed in claim 4, wherein: one side of the driven wheel (31) is meshed with a driving wheel (32), and a power transmission shaft (36) is arranged on the driving wheel (32).
6. A converter bottom-blown brick replacement and gap repair apparatus according to claim 5, wherein: the position of the blowing pipe (38) close to the blowing tank (4) is also provided with a blowing pipe (7).
7. The device for replacing and repairing the bottom blowing brick of the converter as claimed in claim 6, wherein: the upper ends of the supporting rod (37) and the blowing pipe (38) are arranged in the same fixing ring.
8. The method for replacing bottom-blown bricks and repairing gaps of a converter by using the device for replacing bottom-blown bricks and repairing gaps of a converter according to claim 7, wherein: the method comprises the following steps:
A. drilling:
prefabricating a bottom blowing brick (2) according to the diameter of a drilling hole, drilling the bottom blowing brick to be repaired, wherein the diameter of the drilling hole is equal to the bottom diameter of a round platform part (21) of the bottom blowing brick (2);
B. installing a bottom blowing brick:
the front end of the round table part (21) is coated with refractory mortar, the bottom blowing brick (2) is jacked into a preset position by jacking equipment, the front end of the round table part (21) is flush with the top of a drilling hole, the bottom diameter side part of the round table part (21) is tightly attached and sealed with the drilling hole, the cylindrical part (22) is adjusted, and the equal gap between the cylindrical part (22) and the drilling hole is ensured;
C. installation clearance repair device:
the grinding wheel (34) and the spray gun (35) are deeply penetrated into a gap between the cylindrical part (22) and the drill hole by utilizing the driven wheel (31), the supporting rod (37) and the spray gun (38), and the position of the limiting plate (6) is adjusted so as to ensure that the gap repairing device (3) above the pressing disc (5) has enough space to withdraw when being matched and positioned with the hydraulic rod (61);
D. repairing:
opening a blowing pipe (38), spraying materials in a blowing tank (4) into a gap between a cylindrical part (22) and a drilling hole, controlling the flow speed to be not more than 0.5kg/min, simultaneously opening a power device of a driving wheel (32), starting a driven wheel (31) to rotate to drive a gunning gun (35) to conduct gunning and rotating, and a grinding wheel (34) grinding and compacting the materials sprayed by the gunning gun (35), wherein the whole gap repairing device (3) gradually moves downwards and exits under the reverse thrust of the grinding wheel (34) along with compaction and superposition of the sprayed materials, so that the pressure of a hydraulic rod (61) is kept constant, the consistency of the whole process of gunning is ensured, and when the position of the gunning gun (35) is level with the bottom surface of a converter block, the gunning operation is finished; closing the blowing pipe (38) and the power unit (62);
E. and (3) purging and sintering:
after the gunning is finished, the purging pipe (7) is opened to purge the residual materials in the blowing pipe (38), the furnace is waited for more than 60 minutes, the gunning materials are sintered by utilizing the temperature of the furnace body, and then the normal smelting link is entered.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811639429.XA CN109735679B (en) | 2018-12-29 | 2018-12-29 | Device and method for replacing converter bottom blowing bricks and repairing gaps |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811639429.XA CN109735679B (en) | 2018-12-29 | 2018-12-29 | Device and method for replacing converter bottom blowing bricks and repairing gaps |
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| CN109735679A CN109735679A (en) | 2019-05-10 |
| CN109735679B true CN109735679B (en) | 2023-06-20 |
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| CN110184412B (en) * | 2019-06-04 | 2021-07-09 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Method for replacing bottom blowing brick cup of converter |
| CN112325653B (en) * | 2020-09-28 | 2022-09-20 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Repairing method of metal mixer lining |
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| JP5552837B2 (en) * | 2010-02-26 | 2014-07-16 | 新日鐵住金株式会社 | Repair method of converter steel hole |
| CN102676730B (en) * | 2012-05-25 | 2016-05-11 | 宣化钢铁集团有限责任公司 | The Rapid Thermal replacing method of converter bottom blowing air brick, Special drill machine and air brick |
| CN103333988A (en) * | 2013-07-12 | 2013-10-02 | 鞍钢股份有限公司 | Method and device for quickly repairing converter steel tapping hole |
| CN106702073A (en) * | 2015-11-17 | 2017-05-24 | 鞍钢股份有限公司 | Hot replacement method for bottom blowing element of converter |
| CN107288020A (en) * | 2017-08-14 | 2017-10-24 | 苏州世纪天成信息技术有限公司 | A kind of intelligent bituminous patch system cooperated based on unmanned plane and its method of work |
| CN209602581U (en) * | 2018-12-29 | 2019-11-08 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A kind of device of the replacement of bottom-blowing of converter brick and gap reparation |
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2018
- 2018-12-29 CN CN201811639429.XA patent/CN109735679B/en active Active
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