CN114657319B - Converter trunnion area furnace lining erosion part brick pasting maintenance device and use method thereof - Google Patents
Converter trunnion area furnace lining erosion part brick pasting maintenance device and use method thereof Download PDFInfo
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- CN114657319B CN114657319B CN202210306027.8A CN202210306027A CN114657319B CN 114657319 B CN114657319 B CN 114657319B CN 202210306027 A CN202210306027 A CN 202210306027A CN 114657319 B CN114657319 B CN 114657319B
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/42—Constructional features of converters
- C21C5/44—Refractory linings
- C21C5/441—Equipment used for making or repairing linings
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
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Abstract
The invention discloses a brick sticking maintenance device for a furnace lining erosion part of a trunnion area of a converter and a using method thereof, wherein the device comprises a furnace repairing shovel and/or a spray repair gun, the furnace repairing shovel comprises a furnace repairing shovel support rod and a furnace repairing shovel head arranged at one end part of the support rod, and the device also comprises a support rotating structure for supporting the furnace repairing shovel and/or the spray repair gun, the support rotating structure comprises a lower structure, a pulley seat and a pulley for supporting and positioning the furnace repairing shovel support rod/or the spray repair gun, the pulley is rotatably arranged on the pulley seat, and the pulley seat can be horizontally and rotatably arranged on the lower structure. The brick sticking maintenance effect of the lining erosion part of the converter trunnion area can be effectively enhanced, so that the service life of the converter lining is prolonged, and the consumption of refractory materials and the labor intensity are reduced; meanwhile, the maintenance operation is simple and convenient, the efficiency is high, the cost is low, the time and the labor are saved, and the safety and the reliability are realized.
Description
Technical Field
The invention relates to the technical field of converter maintenance, in particular to a brick sticking maintenance device for a lining erosion part in a trunnion area of a converter and a using method thereof.
Background
The service life of the converter lining is very important for improving the production efficiency, prolonging the furnace life, improving the quality of molten steel, improving the variety and structure, reducing the consumption of refractory materials and increasing the economic benefit. The converter lining mainly comprises a heat insulation layer, a permanent layer and a working layer, and in the actual smelting process, extremely complex and violent physical and chemical reactions and mechanical motions are carried out in the converter, so that the converter lining is easy to corrode and damage in the using process. At present, most of steel enterprises generally adopt magnesium fettling sand to maintain furnace linings of a charging side, a furnace bottom and a steel tapping side of a converter, but for the furnace lining of a trunnion part of the converter, because the surface of the furnace lining brick of the part is not covered by a protective slag layer except erosion in a blowing process, carbon in the brick body is easy to oxidize, and the furnace lining brick is difficult to repair by fettling sand, the damage is the most serious, and the magnesia fettling sand becomes the weakest link in maintaining the furnace lining of the converter at present. Although the traditional gunning process plays a certain positive role in the aspect of maintenance of the furnace lining of the trunnion region, the erosion of the furnace lining of the trunnion region becomes abnormal and serious along with the increase of the furnace life of the converter, particularly in the middle and later periods of the furnace service, and the maintenance requirement is difficult to meet by the simple gunning process.
In order to keep the thickness of the furnace lining of the converter trunnion area and ensure the operation safety of the furnace, a tile maintenance means has to be added. When the traditional manual driving of the furnace patching shovel is used for brick patching operation, because the temperature in the furnace is high, the length of the furnace patching shovel is long, the weight is heavy, the difficulty of brick patching maintenance operation is high, and the brick patching accuracy is low, the brick patching maintenance effect of a furnace lining erosion part in a converter trunnion area cannot be guaranteed, the refractory material waste is caused, and the operation safety of the converter under the condition of the converter is influenced.
For example, the device for throwing bricks for repairing the converter disclosed in chinese patent CN203683574U comprises a track of a furnace dismantling machine, a large arm shaft, an arm rotation operation control mechanism, an arm head rod, a cradle rack and a brick basket, which form a front throwing device. The furnace repairing brick is arranged in the brick basket, and the brick basket and the furnace repairing brick are accurately put into the position, required to be repaired, of the furnace lining together through being matched with the large arm shaft of the furnace dismantling machine, so that the furnace repairing effect is achieved, and meanwhile, the furnace repairing brick is prevented from being in direct contact with high temperature. However, the device has a relatively complex structure and large equipment investment, and the popularization and the application of the device are limited.
Also disclosed in chinese patent CN113265508A is an air-cooled tile shovel for converter fettling maintenance and a method for using the same, which mainly comprises: a main support device base, a main support device, an auxiliary support device and an air-cooled tile shovel main body. According to the method, the furnace supplementing shovel is cooled through air cooling, so that the thermal deformation of the large shovel is reduced, and meanwhile, the furnace supplementing shovel is matched with the main supporting device and the auxiliary supporting device for use, so that the operation difficulty is reduced and the tile sticking accuracy is improved. However, the device is provided with hoisting holes on the base of the main supporting device, and when different furnace bases need brick pasting and furnace repairing, a crown block needs to be adopted for hoisting, so that the positioning is not easy, and certain interference can be caused to production organization; in addition, the device is provided with a main supporting device and an auxiliary supporting device which are respectively provided with a guide wheel, the up-and-down motion of the entry of the fettling shovel into the furnace can be realized by adjusting the height difference of the guide wheels on the main supporting device and the auxiliary supporting device, but the left-and-right rotation motion of the fettling shovel can not be realized, and the requirement of the tile-sticking maintenance of different erosion parts of the furnace lining in a converter trunnion area can not be met.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a brick pasting maintenance device for a furnace lining erosion part in a converter trunnion area and a use method thereof, which can effectively carry out brick pasting maintenance on the furnace lining erosion part in the converter trunnion area and have simple and convenient operation.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
the utility model provides a device is maintained to converter trunnion district furnace wall erosion position tiling, includes the benefit stove shovel and/or spouts the benefit rifle, the benefit stove shovel includes benefit stove shovel bracing piece and establishes the benefit stove shovel head at bracing piece one end, still including being used for supporting revolution mechanic that supports benefit stove shovel and/or spout the benefit rifle, support revolution mechanic includes substructure, pulley block and is used for supporting the pulley of location benefit stove shovel bracing piece/or spout the benefit rifle, what the pulley was rotatable establishes on the pulley block, but the pulley block horizontal rotation establishes on the substructure.
And an annular groove is formed in the outer edge of the pulley, and the inner diameter of the annular groove is larger than the outer diameters of the support rod of the fettling shovel and the gunning gun.
The pulley is arranged on the pulley seat through a wheel shaft, and the wheel shaft is horizontally arranged.
The pulley seat is arranged on the lower structure through the lifting structure.
The lower structure is a rotatable cross arm, and the pulley seat is arranged on one end of the cross arm through a plane bearing and a vertically arranged rotating shaft.
The other end of the supporting rod is provided with a handheld handle, and the handheld handle is provided with a heat insulation sleeve.
The other end of the cross arm is arranged on the outer side of a furnace front fire-blocking door of the converter through a hinge.
The bottom of the outer side of the furnace front fire-blocking door is provided with a notch, and the cross arm is arranged corresponding to the notch.
A use method of the brick sticking maintenance device for the lining erosion part of the converter trunnion area comprises the following steps:
1) Brick sticking is carried out to maintain the previous furnace steel, after tapping is finished and the converter is normally protected by slag splashing, the slag in the furnace is completely turned over, and the thickness of the furnace lining in the trunnion area of the converter is measured by adopting a laser thickness gauge;
2) Closing the furnace front fire-blocking door and keeping a proper distance, rotating the supporting and rotating structure to a position parallel to the furnace front fire-blocking door and firmly fixing, placing a supporting rod of the furnace supplementing shovel in a groove of the pulley and preparing for tiling operation;
3) Placing the fettling bricks on the plane of the shovel head of the fettling shovel, holding the handle by a hand of an operator to push the fettling shovel to respectively send the fettling bricks to the erosion parts of the furnace lining of the left trunnion area and the right trunnion area of the converter for tile sticking maintenance; repeating the tile maintenance operation until the erosion parts of the furnace lining in the left trunnion zone and the right trunnion zone of the converter are filled;
4) After the maintenance of the tiling is finished, the fettling shovel is moved out of the groove of the pulley; then arranging a gunning gun on the pulley to gunk the repaired bricks after the bricks are pasted, and after gaps among the repaired bricks are filled, uniformly and completely covering the repaired bricks with gunning material; after the gunning operation is finished, the rotary supporting structure is rotated, and is hidden outside the fire door in front of the furnace and firmly fixed; and sintering the gunning refractory and the fettling bricks.
Compared with the prior art, the invention has the following advantages:
the brick sticking maintenance device for the lining erosion part of the trunnion area of the converter and the use method thereof have reasonable design, can effectively enhance the brick sticking maintenance effect of the lining erosion part of the trunnion area of the converter, further prolong the service life of the lining of the converter and reduce the consumption of refractory materials and labor intensity; meanwhile, the maintenance operation is simple and convenient, the efficiency is high, the cost is low, the time and the labor are saved, and the safety and the reliability are realized.
Drawings
The following brief description of the drawings and reference numerals in the drawings forms a part of this specification:
FIG. 1 is a schematic diagram of the operation of the apparatus of the present invention.
FIG. 2 is a schematic view of the structure of the apparatus of the present invention.
FIG. 3 is a partial schematic view of the apparatus of the present invention.
FIG. 4 is a schematic view of the structure of the fettling shovel of the present invention.
Fig. 5 is a top view of the fettling shovel of fig. 4.
In the figure:
1. the converter comprises a converter body, 2 furnace repairing bricks, 3 furnace repairing shovels, 301 furnace repairing shovel heads, 302 supporting rods, 303 handheld handles, 4 supporting rotating structures, 401 pulleys, 402 pulley seats, 403 flat bearings, 404 rotating shafts, 405 hinges, 406 cross arms, 407 wheel shafts, 408 rotating bearings and 5 furnace front fire doors.
Detailed Description
The following description of the embodiments of the present invention will explain the present invention in further detail by referring to the accompanying drawings.
As shown in fig. 1 to 5, the brick-sticking maintenance device for the lining erosion part of the trunnion zone of the converter comprises a furnace repairing shovel 3 and/or a gunning gun and a supporting rotating structure 4 for supporting the furnace repairing shovel and/or the gunning gun; the fettling shovel comprises a fettling shovel supporting rod 302 and a fettling shovel head 301 arranged at one end of the supporting rod, the supporting and rotating structure comprises a lower structure, a pulley seat 402 and a pulley 401 used for supporting and positioning the fettling shovel supporting rod and/or a gunning gun, the pulley is rotatably arranged on the pulley seat, and the pulley seat can be horizontally rotated and arranged on the lower structure.
The pulley is arranged on the pulley seat through a wheel shaft 407, and the wheel shaft is horizontally arranged; the outer edge of the pulley is provided with an annular groove, and the inner diameter of the annular groove is larger than the outer diameters of the supporting rod of the fettling shovel and the gunning gun.
The device is provided with the concave pulley and the rotating structure, has rolling and rotating functions, is favorable for quickly and accurately conveying the fettling bricks to the positions where the furnace lining of the converter trunnion area needs brick sticking maintenance in the process that the fettling shovel is pushed on the concave pulley, and enhances the adaptability of the device to different erosion parts of the furnace lining of the converter trunnion area; meanwhile, the inner diameter of the concave pulley is slightly larger than the outer diameter of the support rod of the fettling shovel, so that the support rod of the fettling shovel rolls in the groove on the surface of the concave pulley, and the effects of saving time and labor and preventing the fettling shovel from deviating are achieved. When the later stage utilizes the gunning gun to spout the benefit stove brick behind the tiling and mends, can take off the stove shovel of mending from the pulley recess, will spout the gunning gun and place in the pulley recess, realize the rotation support of gunning gun, spout and mend easy and simple to handle high-efficiently.
Further, the pulley seat 402 is arranged on the lower structure through a lifting structure, the lifting structure can be a lifting screw rod structure or a lifting cylinder structure, the height position of the pulley can be adjusted, and the height position of the furnace repairing shovel and the gunning gun can be adjusted simply and conveniently, so that the operation is convenient.
Preferably, the lower structure is a rotatable cross arm 406, with a pulley block mounted on one end of the cross arm by a flat bearing 403 and a vertically disposed pivot shaft 404; the other end of the crossbar is arranged on the outside of the front fire door 5 of the converter by means of a hinge 405.
The other end of the supporting rod of the furnace supplementing shovel is provided with a handheld handle 303 which is provided with a heat insulation sleeve, so that the operation is safe and reliable; the bottom of the outer side of the furnace front fire door is provided with a notch, the cross arm is arranged corresponding to the notch, and the cross arm can be stored in the notch when not used, so that the structure is compact.
The device is arranged at a proper position outside a fire door in front of the furnace and is connected with a concave sliding and rotating structure through a hinge and a cross arm, so that the purposes of accurate positioning, special furnace application and no need of transition lifting are realized. When the brick is pasted, the furnace front fire-blocking door is closed and a proper distance is reserved, the device is rotated to be parallel to the furnace front fire-blocking door and is firmly fixed, and the closed furnace front fire-blocking door can prevent most of heat radiation from harming operating personnel, so that the operation safety is improved; after the maintenance operation of the tile is finished, the device is rotated again, and the tile is hidden outside the fire door in front of the furnace and is firmly fixed, so that the tile is prevented from being damaged by high temperature and splashing, and the service life of the tile is prolonged.
Preferred specific examples of the apparatus are:
the invention relates to a brick sticking maintenance device for a lining erosion part of a trunnion area of a converter, which mainly comprises: the converter comprises a converter body 1, a fettling brick 2, a fettling shovel 3, a supporting rotating structure 4 and a stokehold fire-blocking door 5. Wherein, support revolution mechanic mainly includes: a support pulley 401, a pulley holder 402, a plane bearing 403, a pivot shaft 404, a hinge 405, a cross arm 406, an axle 407, and a rotation bearing 408; the furnace supplementing shovel 3 comprises: a furnace supplementing shovel head 301, a support rod 302 and a hand-held handle 303.
The female pulley 401 is coupled to an axle 407 and a swivel bearing 408 and used in cooperation to provide the female pulley 401 with a rolling function. The concave pulley 401 is arranged on the pulley seat 402, the inner diameter of the concave pulley is slightly larger than the outer diameter of the fettling shovel supporting rod and the gunning gun, the fettling shovel supporting rod and the gunning gun can be ensured to roll in a groove on the surface of the concave pulley 401, and the effects of saving time and labor and preventing the fettling shovel supporting rod and the gunning gun from deviating can be achieved. The plane bearing 403 is connected with the rotating shaft 404, so that the concave pulley 401 has a rotating function, and accurate tile-sticking maintenance is facilitated for different erosion parts of a furnace lining in a converter trunnion area. In addition, the device is fixedly arranged at a proper position outside a fire door in front of the furnace and is connected with the supporting rotating structure 4 through a hinge 405 and a cross arm 406, so that the purposes of accurate positioning, special furnace application and no need of transition and lifting are realized. When the brick sticking maintenance is carried out, the furnace front fire-blocking door 5 is closed and a proper distance is reserved, the rotary support rotating structure 4 is rotated to the position parallel to the furnace front fire-blocking door 5 and is firmly fixed, the furnace repairing shovel supporting rod is placed in a groove in the inner surface of the concave pulley, the furnace repairing brick 2 is placed on the furnace repairing shovel head, an operator holds the handle to manually push the furnace repairing shovel 3, and the furnace repairing brick 2 is conveyed to the position, needing the brick sticking maintenance, of the furnace lining of the trunnion area of the converter, so that the brick sticking maintenance is carried out on the furnace repairing brick. After the maintenance of the tile is finished, the supporting rod or the spray gun of the furnace repairing shovel 3 is moved out of the concave pulley, the rotating structure 4 is rotated and supported again, and is hidden outside the front fire door 5 and fixed firmly, so that the high temperature and the spraying are prevented from damaging the furnace repairing shovel.
The use method of the brick sticking maintenance device for the lining erosion part of the trunnion region of the converter comprises the following steps:
1) Brick sticking is carried out to maintain the previous furnace steel, after tapping is finished and the converter is normally protected by slag splashing, the slag in the furnace is completely turned over, and the thickness of the furnace lining in the trunnion area of the converter is measured by adopting a laser thickness gauge;
2) Closing the furnace front fire-blocking door and keeping a proper distance, rotating the supporting and rotating structure to a position parallel to the furnace front fire-blocking door and firmly fixing, placing a supporting rod of the furnace supplementing shovel in a groove of the pulley and preparing for tiling operation;
3) Placing the fettling bricks on the plane of a shovel head of the fettling shovel, holding a handle by a hand of an operator to push the fettling shovel to respectively send the fettling bricks to the erosion parts of the furnace lining in the left and right trunnion areas of the converter for tile sticking maintenance; repeating the tile maintenance operation until the erosion parts of the furnace lining in the left trunnion zone and the right trunnion zone of the converter are filled;
4) After the maintenance of the tile is finished, moving the fettling shovel out of the groove of the pulley; arranging a gunning gun on the pulley to gunk the bricked-up bricks, and after filling gaps among the bricked-up bricks, uniformly and completely covering the gunning material on the bricked-up bricks; after the gunning operation is finished, the rotary supporting structure is rotated, and is hidden outside the fire door in front of the furnace and firmly fixed; and sintering the gunning refractory and the fettling bricks.
Method of use of the invention example 1:
(1) And tile sticking is used for maintaining the previous furnace steel, after tapping is finished, and after the converter is normally splashed and protected, the slag in the converter is completely turned over. The thickness of the furnace lining in the trunnion zone of the converter is measured by a laser thickness gauge, the furnace lining in the left trunnion zone and the right trunnion zone of the converter are measured to be 540mm and 530mm respectively, and compared with the standard value of 650mm of a new furnace lining, the furnace lining is eaten by 110mm and 120mm respectively.
(2) The furnace front fire-blocking door 5 is closed and a proper distance is left, the device supporting and rotating structure 4 is rotated to the position parallel to the furnace front fire-blocking door 5 and is firmly fixed, and the supporting rod of the furnace repairing shovel 3 is placed in the groove of the concave pulley 1 to prepare for tiling operation.
(3) And placing the fettling bricks 2 on the plane of the shovel head of the fettling shovel, holding the handle by hands of an operator to push the fettling shovel 3 to respectively convey the fettling bricks 2 to the erosion parts of the furnace lining of the left trunnion area and the right trunnion area of the converter for tile sticking maintenance. And repeating the tile maintenance operation until the furnace lining erosion parts of the left trunnion area and the right trunnion area of the converter are filled and leveled.
(4) After the maintenance of the tiling is finished, the fettling shovel is moved out of the groove of the pulley; arranging a gunning gun on the pulley to gunk the bricked-up bricks, and after filling gaps among the bricked-up bricks, uniformly and completely covering the gunning material on the bricked-up bricks; after the gunning operation is finished, the rotary supporting structure is rotated, and is hidden outside the fire door in front of the furnace and firmly fixed; and sintering the gunning refractory and the fettling bricks for 10min.
(5) And after tile sticking maintenance, before the first furnace smelting, the converter firstly carries out slag splashing and furnace protection operation, the slag splashing time is 1.5min, and the next furnace smelting is started.
(6) And after the smelting of the furnace molten steel is finished, normally splashing slag to protect the converter, and completely turning over slag in the converter after the slag in the converter is completely solidified. And measuring the thickness of the furnace lining of the trunnion region of the converter again by using a laser thickness gauge, wherein the thicknesses of the furnace lining of the left trunnion region and the right trunnion region of the converter are measured to be 690mm and 680mm respectively, namely, the thicknesses of the furnace lining of the left trunnion region and the right trunnion region of the converter are increased by 150mm and 150mm respectively compared with the thicknesses of the furnace lining of the left trunnion region and the right trunnion region of the converter before maintenance.
Method of use of the invention example 2:
(1) And tile sticking is used for maintaining the previous furnace steel, after tapping is finished, and after the converter is normally splashed and protected, the slag in the converter is completely turned over. The thickness of the furnace lining in the trunnion zone of the converter is measured by adopting a laser thickness gauge, the furnace lining in the left trunnion zone and the furnace lining in the right trunnion zone of the converter are measured by actual measurement and are respectively 441mm and 413mm, and the furnace lining is respectively eaten 209mm and 237mm compared with the standard value of a new furnace lining of 650 mm.
(2) Closing the front fire-blocking door 5 and keeping a proper distance, rotating the device supporting and rotating structure 4 to a position parallel to the front fire-blocking door 5 and firmly fixing, and placing the supporting rod of the fettling shovel 3 in the concave pulley groove to prepare for tiling operation.
(3) The furnace repairing brick 2 is placed on the plane of the shovel head of the furnace repairing shovel, and an operator holds the handle by hand to push the furnace repairing shovel 3 to respectively convey the furnace repairing brick 2 to the furnace lining erosion parts of the left and right trunnion areas of the converter for brick pasting maintenance. And repeating the tile maintenance operation until the erosion parts of the furnace lining in the left trunnion area and the right trunnion area of the converter are filled and leveled.
(4) After the maintenance of the tile is finished, moving the fettling shovel out of the groove of the pulley; arranging a gunning gun on the pulley to gunk the bricked-up bricks, and after filling gaps among the bricked-up bricks, uniformly and completely covering the gunning material on the bricked-up bricks; after the gunning operation is finished, the rotary supporting structure is rotated, and is hidden outside the fire door in front of the furnace and firmly fixed; and sintering the gunning refractory and the fettling bricks for 14min.
(5) And after tile sticking maintenance, before the first furnace smelting, the converter firstly carries out slag splashing and furnace protection operation, the slag splashing time is 2min, and the furnace smelting is started.
(6) And after the smelting of the furnace molten steel is finished, normally splashing slag to protect the converter, and completely turning over slag in the converter after the slag in the converter is completely solidified. And measuring the thickness of the furnace lining of the converter trunnion area again by adopting a laser thickness gauge, wherein the thicknesses of the furnace lining of the left trunnion area and the right trunnion area of the converter are measured to be 648mm and 630mm respectively, namely, the thicknesses of the furnace lining of the left trunnion area and the right trunnion area of the converter are increased by 207mm and 217mm respectively compared with the thicknesses of the furnace lining of the left trunnion area and the right trunnion area of the converter before maintenance.
Method of use of the invention example 3:
(1) And (4) tile sticking is carried out to maintain the previous furnace steel, after tapping is finished, and after the converter is protected by normal slag splashing, the slag in the converter is completely turned over. The thickness of the furnace lining in the trunnion zone of the converter is measured by adopting a laser thickness gauge, the furnace lining in the left trunnion zone and the right trunnion zone of the converter are measured by measuring 356mm and 427mm respectively, and compared with the standard value of a new furnace lining of 650mm, the furnace lining is eaten 294mm and 223mm respectively.
(2) Closing the front fire-blocking door 5 and keeping a proper distance, rotating the device supporting and rotating structure 4 to a position parallel to the front fire-blocking door 5 and firmly fixing, and placing the supporting rod of the fettling shovel 3 in the concave pulley groove to prepare for tiling operation.
(3) Placing the fettling bricks 2 on the plane of the shovel head of the fettling shovel, holding the handle by hands by an operator to push the fettling shovel 3 to respectively send the fettling bricks 2 to the erosion parts of the furnace lining of the left trunnion area and the right trunnion area of the converter for tile sticking maintenance; and repeating the tile maintenance operation until the furnace lining erosion parts of the left trunnion area and the right trunnion area of the converter are filled and leveled.
(4) After the maintenance of the tile is finished, moving the fettling shovel out of the groove of the pulley; then arranging a gunning gun on the pulley to gunk the repaired bricks after the bricks are pasted, and after gaps among the repaired bricks are filled, uniformly and completely covering the repaired bricks with gunning material; after the spray repair operation is finished, the rotary supporting structure is rotated, and is hidden outside the front fire door and firmly fixed; and sintering the gunning refractory and the fettling bricks, wherein the sintering time is controlled to be 16min.
(5) And after tile sticking maintenance, before the first furnace smelting, the converter firstly carries out slag splashing and furnace protection operation, the slag splashing time is 2min, and the furnace smelting is started.
(6) After the smelting of the furnace molten steel is finished, normally splashing slag to protect the converter, and completely turning over slag in the converter after the slag in the converter is completely solidified; and measuring the thickness of the furnace lining in the trunnion region of the converter again by using a laser thickness gauge, wherein the thicknesses of the furnace lining in the left trunnion region and the right trunnion region of the converter are measured as 652mm and 643mm respectively, namely, the thicknesses of the furnace lining in the left trunnion region and the right trunnion region of the converter are increased by 296mm and 216mm respectively compared with the thicknesses before maintenance.
Compared with the prior art, the invention has the following advantages:
(1) The concave pulley and the rotating structure can enable the device to have rolling and rotating functions, adaptability of different erosion parts of a furnace lining in a converter trunnion area is enhanced, and the fettling bricks can be quickly and accurately conveyed to a required brick sticking maintenance part. Compared with the conventional method, the single-time brick-sticking maintenance time can be saved by 10-15min, and the labor intensity of operators is effectively reduced.
(2) The device prolongs the service life of the furnace lining in the trunnion area of the converter, can almost realize the synchronization with the furnace life of the converter, and effectively solves the problems of high gunning frequency and poor maintenance effect caused by serious erosion of the part in the later period of the furnace service; compared with the traditional spray repair process, after the single-time brick pasting maintenance, the number of smelting furnaces of the converter can be increased by 45-50 furnaces, and the spray repair times are relatively reduced, so that 0.09-0.11kg/t of refractory material can be saved every year.
(3) The device simple structure supports revolution mechanic and can be used for the support that the mending shovel supported can be used for the gunning rifle again, and it is convenient to use, labour saving and time saving, and cost of manufacture is cheap relatively.
The above-mentioned features are merely for describing preferred embodiments of the present invention and may be arbitrarily combined to form a plurality of embodiments of the present invention.
The invention is described above with reference to the accompanying drawings, it is obvious that the invention is not limited to the above embodiments, and it is within the scope of the invention to use the concept and technical solution of the invention in other fields without substantial or direct modification.
Claims (5)
1. The utility model provides a converter trunnion district furnace wall erosion position tiling maintains device, includes fettling shovel and/or gunning rifle, the fettling shovel includes fettling shovel bracing piece and establishes the fettling shovel head at a bracing piece tip, its characterized in that: the support rotating structure comprises a lower structure, a pulley seat and a pulley for supporting and positioning a support rod of the furnace repairing shovel and/or the gunning gun, wherein the pulley is rotatably arranged on the pulley seat, and the pulley seat can be horizontally and rotatably arranged on the lower structure;
the pulley seat is arranged on the lower structure through a lifting structure;
the lower structure is a rotatable cross arm, and the pulley seat is arranged on one end of the cross arm through a plane bearing and a vertically arranged revolving shaft;
the other end of the cross arm is arranged on the outer side of a furnace front fire-blocking door of the converter through a hinge; the bottom of the outer side of the furnace front fire-blocking door is provided with a notch, and the cross arm is arranged corresponding to the notch.
2. The converter trunnion zone lining erosion portion tile maintenance device of claim 1, further comprising: and an annular groove is formed in the outer edge of the pulley, and the inner diameter of the annular groove is larger than the outer diameters of the support rod of the fettling shovel and the gunning gun.
3. The brick-lining erosion portion brick-lining maintenance device for the trunnion zone of the converter according to claim 1, wherein: the pulley is arranged on the pulley seat through a wheel shaft, and the wheel shaft is horizontally arranged.
4. The converter trunnion zone lining erosion portion tile maintenance device of claim 1, further comprising: and a handheld handle is arranged at the other end of the supporting rod, and a heat insulation sleeve is arranged on the handheld handle.
5. A method for using the brick-lining erosion area brick-lining maintenance device of the trunnion zone of the converter according to any one of claims 1 to 4, comprising: the using method comprises the following steps:
1) Brick sticking is carried out to maintain the previous furnace steel, after tapping is finished and the converter is normally protected by slag splashing, the slag in the furnace is completely turned over, and the thickness of the furnace lining in the trunnion area of the converter is measured by adopting a laser thickness gauge;
2) Closing the stokehole fire-blocking door and keeping a proper distance, rotating the supporting rotary structure to a position parallel to the stokehole fire-blocking door and firmly fixing, placing the supporting rod of the furnace supplementing shovel in the groove of the pulley and preparing for tiling operation;
3) Placing the fettling bricks on the plane of a shovel head of the fettling shovel, holding a handle by a hand of an operator to push the fettling shovel to respectively send the fettling bricks to the erosion parts of the furnace lining in the left and right trunnion areas of the converter for tile sticking maintenance; repeating the tile maintenance operation until the furnace lining erosion parts of the left trunnion zone and the right trunnion zone of the converter are filled and leveled;
4) After the maintenance of the tile is finished, moving the fettling shovel out of the groove of the pulley; then arranging a gunning gun on the pulley to gunk the repaired bricks after the bricks are pasted, and after gaps among the repaired bricks are filled, uniformly and completely covering the repaired bricks with gunning material; after the spray repair operation is finished, the rotary supporting structure is rotated, and is hidden outside the front fire door and firmly fixed; and sintering the gunning refractory and the fettling bricks.
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| CN202210306027.8A CN114657319B (en) | 2022-03-25 | 2022-03-25 | Converter trunnion area furnace lining erosion part brick pasting maintenance device and use method thereof |
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| CN202210306027.8A CN114657319B (en) | 2022-03-25 | 2022-03-25 | Converter trunnion area furnace lining erosion part brick pasting maintenance device and use method thereof |
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| CN114657319B true CN114657319B (en) | 2023-02-28 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006336077A (en) * | 2005-06-02 | 2006-12-14 | Sumitomo Metal Ind Ltd | Method for repairing refractory in converter |
| CN203683574U (en) * | 2013-12-30 | 2014-07-02 | 福建三钢闽光股份有限公司 | Fettling brick feeding device of revolving furnace |
| CN203878162U (en) * | 2014-04-30 | 2014-10-15 | 河北钢铁股份有限公司承德分公司 | Converter brick refilling bracket device |
| CN106995866A (en) * | 2017-05-31 | 2017-08-01 | 唐山国丰钢铁有限公司 | A kind of low-cost high-efficiency converter fettling technique |
-
2022
- 2022-03-25 CN CN202210306027.8A patent/CN114657319B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006336077A (en) * | 2005-06-02 | 2006-12-14 | Sumitomo Metal Ind Ltd | Method for repairing refractory in converter |
| CN203683574U (en) * | 2013-12-30 | 2014-07-02 | 福建三钢闽光股份有限公司 | Fettling brick feeding device of revolving furnace |
| CN203878162U (en) * | 2014-04-30 | 2014-10-15 | 河北钢铁股份有限公司承德分公司 | Converter brick refilling bracket device |
| CN106995866A (en) * | 2017-05-31 | 2017-08-01 | 唐山国丰钢铁有限公司 | A kind of low-cost high-efficiency converter fettling technique |
Non-Patent Citations (1)
| Title |
|---|
| 转炉补炉工艺优化;贾宁等;《河北冶金》;20180728(第07期);第69-72页 * |
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| CN114657319A (en) | 2022-06-24 |
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