CN114231689A - Press-in device, test device and test method for converter live furnace bottom filler - Google Patents
Press-in device, test device and test method for converter live furnace bottom filler Download PDFInfo
- Publication number
- CN114231689A CN114231689A CN202111582925.8A CN202111582925A CN114231689A CN 114231689 A CN114231689 A CN 114231689A CN 202111582925 A CN202111582925 A CN 202111582925A CN 114231689 A CN114231689 A CN 114231689A
- Authority
- CN
- China
- Prior art keywords
- furnace
- slurry
- arc
- converter
- furnace body
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- 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
-
- 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
- C21C5/46—Details or accessories
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The invention discloses a press-in device, a test device and a test method for converter live bottom filler, which comprise a control cabinet, a double-layer stirrer, a special press-in pump, a flow divider, a slurry conveying pipe and a vertical arc electric heating furnace, the vertical arc electric heating furnace comprises a furnace body, a heating component in the furnace and a furnace cover, the furnace cover is firmly combined with the furnace body, an arc gap is formed between the furnace cover and the furnace body, then the double-layer stirring machine is connected with a special pressing pump through a guide pipe, the special pressing pump is connected with a slurry injection pipe on the U-shaped groove through a slurry conveying pipe, and then, the test is carried out step by step, the proportion of the filler can be more accurately mastered, the adaptability of equipment and a construction process can be tested, the feasibility of field construction is verified, and the quality assurance of the construction process is confirmed, so that correct arrangement is conveniently made for the field construction, and the construction safety is ensured.
Description
Technical Field
The invention relates to the field of converter filler press-in test devices, in particular to a press-in device, a test device and a test method for converter live bottom filler.
Background
With the improvement of steel smelting technology in China, the converter bottom blowing oxygen and powder spraying smelting mode is gradually emphasized by steel enterprises, the oxygen bottom blowing converter blowing method can ensure that the stirring intensity of a molten pool is severe, oxygen flow is uniformly dispersed and blown into the molten pool, the influence of an upper slag layer on the reaction in the converter is less, and unexpected smelting effects and other excellent smelting characteristics can be obtained through spraying iron ore powder or returning a mixture of slag and lime powder into the furnace bottom. But the service life of the refractory material at the bottom of the converter is reduced, in order to improve the utilization rate of the refractory material at the bottom of the converter and the steelmaking efficiency, the refractory material at the bottom of the converter needs to be replaced in a hot state in the smelting process, and the converter body of the converter is also designed into a movable bottom structure mode which can be quickly disassembled and replaced.
In the corresponding process of hot replacement of the converter bottom, an annular gap is formed between the replaced live converter bottom refractory and the converter body refractory, in the process of plugging the annular gap, the quality of the filler and the construction process are the key points related to the replacement of the converter bottom, and at present, workers gradually grope, master and verify the proportion of the filler under the real construction environment, so that the smoothness of the construction process is increased, the feasibility of construction is verified, but the converter can be unstable in operation and has certain danger, which is a problem to be solved in the prior art.
Disclosure of Invention
In order to make up for the defects of the prior art, the invention provides a testing device and a testing method for a converter live furnace bottom filler.
The invention is realized by the following technical scheme:
a test device for a live furnace bottom filling material of a converter comprises a control cabinet, a double-layer stirring machine, a special pressing pump, a flow divider, a slurry conveying pipe and a vertical arc-shaped electric heating furnace, wherein the vertical arc-shaped electric heating furnace comprises a furnace body, a furnace heating component and a furnace cover, the furnace body is a vertical arc-shaped steel box shell, an arc-shaped furnace tank is arranged on the concave side of the furnace body, glass fiber heat insulation materials are pasted on the wall of the furnace tank, an aluminum silicate fiber board is built in the furnace tank, an arc-shaped groove-shaped hearth is also built on the aluminum silicate fiber board, high-aluminum refractory bricks are built at the bottom of the furnace tank, the outer vertical surfaces of the high-aluminum refractory bricks are flush with the outer vertical surfaces of the lower edge of the furnace body, an arc-shaped table surface is formed on the upper portion of the high-aluminum refractory bricks, vertical magnesia carbon bricks are built on the arc-shaped table surface, and the upper edge of the magnesia carbon bricks is close to the glass fiber heat insulation materials on the upper wall of the furnace tank, completely closing the hearth, wherein the outer vertical surface of the magnesia carbon brick is flush with the outer vertical surface of the high-alumina refractory brick; the heating assembly in the furnace comprises a heating plate and 3 thermocouples, wherein the heating plate is arranged on the wall of the hearth, one of the 3 thermocouples is arranged on the heating plate, one thermocouple is arranged at the bottom of the heating plate, and the other thermocouple is arranged on an aluminum silicate fiberboard below the hearth; the bell is vertical curved steel bell, includes the arc and fixes the reinforcement at the arc concave surface, both ends and bottom welding have U type groove about the arc convex surface, all be equipped with graphite packing on the U type groove lateral wall, the intermediate position in the U type groove of arc bottom is equipped with the mud filling pipe, be equipped with the trip valve on the mud filling pipe.
Further optimally, the double-layer stirring machine is divided into an upper layer and a lower layer which can run simultaneously, the bottom of the upper layer of the double-layer stirring machine is provided with a discharge hole which can be closed, the lower layer of the double-layer stirring machine is provided with a discharge hole, and the discharge hole is provided with an anti-blocking filter valve.
Further optimally, the flow divider is provided with a feed inlet and a plurality of discharge outlets, and the discharge outlets are provided with cut-off regulating valves.
Further optimally, both ends of the slurry conveying pipe are provided with quick connectors.
Further optimally, the furnace body both sides articulate respectively 2 rotatable screw thread hand wheels, be fixed with 1 steady nail respectively, the both sides of arc are fixed with 2 thread grooves, 1 steady nail hole respectively.
Further optimally, the furnace cover is fixed with the furnace body through the threaded hand wheel, the threaded groove, the stable nail and the stable nail hole, and an arc-shaped gap is formed between the furnace cover and the furnace body.
Further optimally, the control cabinet is provided with a control system of the heating assembly, and the heating assembly penetrates through the glass fiber heat-insulating material and the outer wall of the furnace body through a wire to be electrically connected with the control cabinet.
Further optimally, the double-layer stirring machine is connected with a special pressing-in pump through a guide pipe, the special pressing-in pump is connected with a feeding hole of the flow divider through a slurry conveying pipe, and a discharging hole in the flow divider is connected with a slurry injection pipe in the U-shaped groove through the slurry conveying pipe.
Further optimally, the following steps are carried out through the testing device of the converter live furnace bottom filling material during the test: a, preparing, namely coating a layer of refractory thin material on the outer vertical surfaces of a magnesia carbon brick and a high-alumina refractory brick, coating a layer of refractory thin material on the convex surface of a furnace cover, airing, and then pasting a layer of refractory heat-preservation glass wool with the thickness of 50mm on the upper edge of the furnace cover; b, a furnace cover is combined on the furnace body, a stable nail penetrates through a stable nail hole, a threaded hand wheel is combined on a threaded groove, the furnace cover and the furnace body are firmly fixed by rotating the threaded hand wheel, an arc-shaped gap is formed between the furnace cover and the furnace body, then the double-layer stirring machine is connected with a special pressing-in pump through a guide pipe, the special pressing-in pump is connected with a feeding hole of a flow divider through a slurry conveying pipe, and a discharging hole in the flow divider is connected with a slurry injection pipe in the U-shaped groove through the slurry conveying pipe; c, starting a power supply of the control cabinet, setting a temperature value, starting heating the furnace body by a heating sheet in the hearth, keeping constant temperature when the temperature in the furnace body reaches a set value, adding furnace bottom filler into the double-layer stirrer, and starting slurry mixing; d, dismantling the refractory heat-preservation glass wool in the step A, then starting a special pressing pump to work, injecting the mixed slurry into the arc-shaped gap through a flow divider and a slurry injection pipe, observing the upper opening of the arc-shaped gap between the furnace body and the furnace cover until the slurry is fully pushed into the arc-shaped gap, closing the special pressing pump, closing a stop valve of the slurry injection pipe, disconnecting a slurry conveying pipe and stopping heating of a heating plate; e waiting furnace bodyNaturally cooling to room temperature, opening the furnace cover, and checking the test result, wherein the strength of the cured slurry is not less than 10MPa, and the volume density is not less than 1.8g/cm3And the test is successful if the slurry is uniformly distributed.
The invention further provides a pressing-in device of the converter live furnace bottom filler, which comprises a double-layer stirrer, a special pressing-in pump, a flow divider and a slurry conveying pipe, wherein the flow divider is provided with 1 feeding hole and 4-12 discharging holes, each discharging hole is provided with a cutting-off regulating valve, the double-layer stirrer is connected with the special pressing-in pump through a guide pipe, the special pressing-in pump is connected with the feeding hole of the flow divider through the slurry conveying pipe, and each discharging hole on the flow divider is also connected with the slurry conveying pipe.
The invention has the beneficial effects that:
1) the test device is reasonable in structure and cost-saving, the actual circular converter and the actual circular furnace body are simulated through the arc-shaped furnace body and the furnace cover, the annular gap formed between the arc-shaped furnace body and the furnace cover is simulated through the arc-shaped gap formed between the arc-shaped furnace body and the furnace cover, the test environment is basically similar to the actual construction environment, and the accuracy and the stability of the test process are guaranteed.
2) The test device comprises a control cabinet, a double-layer stirrer, a special pressing pump, a flow divider and a vertical arc electric heating furnace, wherein the control cabinet controls the temperature of the heating furnace, the double-layer stirrer continuously provides filler slurry for the heating furnace, the special pressing pump presses the slurry mixed by the double-layer stirrer into the heating furnace body through the flow divider, a top material seam test is performed in different temperature environments, the proportion of the filler (namely refractory material particles, fine powder and organic solvent with different particle sizes) can be accurately mastered, the adaptability of equipment and a construction process can be tested, the feasibility of site construction is verified, the quality assurance of the construction process is confirmed, so that correct arrangement is made for site construction, and the construction safety is ensured.
3) The invention also provides a device for pressing the furnace bottom filler in the actual furnace bottom hot replacement, when the converter bottom is actually replaced, the furnace bottom is provided with a plurality of slurry injection pipes, and a plurality of discharge ports on the flow divider can be respectively connected with one slurry injection pipe through a plurality of slurry conveying pipes for simultaneous injection. The flow divider can also adjust the slurry flow of each slurry conveying pipe, and the slurry flow can be adjusted according to the slurry injection condition in the annular gap of the furnace bottom, so that the slurry injection is more uniform; if the slurry conveying pipe is blocked or broken down, the two ends of each slurry conveying pipe are respectively provided with a quick connector, and the stop valve and the regulating valve can be closed at any time and can be quickly replaced.
Drawings
FIG. 1 is an overall view of the test apparatus
FIG. 2 is a schematic view of the furnace body structure of a neutral arc electric heating furnace in the test apparatus.
FIG. 3 is a schematic structural view of the furnace body in the test device after the magnesia carbon bricks are built
FIG. 4 is a schematic view of the furnace lid structure of the vertical arc electric heating furnace in the test apparatus
FIG. 5 is a schematic view showing the structure of the test apparatus in which the refractory heat-insulating glass wool is adhered to the furnace cover before the heating furnace heats
FIG. 6 is a schematic view showing the structure of an arc gap between a furnace body and a furnace cover in the test apparatus
FIG. 7 is a schematic view showing the press-fitting means of the present invention for connecting the converter to the actual replacement hearth
In the figure, 1, a furnace body; 2. a furnace cover; 21. a double-layer stirrer; 211. an anti-blocking filter valve; 22. a special pressing pump; 23. a flow divider; 231. cutting off the regulating valve; 232. a slurry delivery pipe; 24. a control cabinet; 25. a converter;
3. a furnace tank; 4. a hearth; 5. an aluminum silicate fiberboard; 6. a glass fiber thermal insulation material; 7. high alumina refractory bricks; 71. an arc-shaped table top; 8. a heating plate; 9. a thermocouple; 10. an arc-shaped plate; 11. a reinforcement; 12. a U-shaped groove; 13. graphite packing; 14. a slurry injection pipe; 141. a shut-off valve; 151. a threaded hand wheel; 152. a thread groove; 161. stabilizing the nail; 162. a nail stabilizing hole; 171. a base; 172. a universal wheel; 18. magnesia carbon bricks; 19. refractory heat-insulating glass wool; 20. an arc-shaped gap.
Detailed Description
In order to clearly explain the technical features of the present invention, the following detailed description of the present invention is provided with reference to the accompanying drawings. In the description of the present invention, it should be noted that the terms "left", "right", "front", "back", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
Example 1:
as shown in figures 1-6, a testing device for a converter live furnace bottom filling material comprises a control cabinet 24, a double-layer stirring machine 21, a special pressing-in pump 22, a flow divider 23, a slurry conveying pipe and a vertical arc-shaped electric heating furnace, wherein the vertical arc-shaped electric heating furnace comprises a furnace body 1, a furnace heating component and a furnace cover 2, the furnace body 1 is a vertical arc-shaped steel box shell, an arc-shaped furnace tank 3 is arranged on the concave side of the furnace body 1, a glass fiber heat-insulating material 6 is attached to the wall of the furnace tank, an aluminum silicate fiber board 5 is built in the furnace tank 3, an arc-shaped groove-shaped hearth 4 is also built on the aluminum silicate fiber board, a high-aluminum refractory brick 7 is built at the bottom of the furnace tank 3, the outer vertical face of the high-aluminum refractory brick 7 is flush with the outer vertical face of the lower edge of the furnace body 1, an arc-shaped table face 71 is formed on the upper portion of the high-aluminum refractory brick 7, a vertical magnesia carbon brick 18 is built on the arc-shaped table face 71, the magnesia carbon bricks 18 are tightly attached after being built, the gap between the two bricks is less than 0.5mm, the upper edges of the magnesia carbon bricks 18 are tightly close to the glass fiber heat insulation material 6 on the upper wall of the furnace groove 3, so that the hearth 4 is completely sealed, the outer vertical surfaces of the magnesia carbon bricks 18, the high-alumina refractory bricks 7 and the upper and lower edges of the furnace body 1 are parallel and level and are arc-shaped, and the radiuses of the outer vertical surfaces of the magnesia carbon bricks, the high-alumina refractory bricks and the furnace body 1 are 2320mm in the embodiment;
the heating assembly in the furnace comprises heating sheets 8 and 3 thermocouples 9, the heating sheets 3 are provided with three rows and arranged on the wall of the hearth 4, one end of each row of heating sheets is respectively powered by a single line of a 380V three-phase circuit, the other ends of the heating sheets are connected in series, one of the 3 thermocouples 9 is arranged on the heating sheet 8, the other thermocouple is arranged at the bottom of the heating sheet 8, and the other thermocouple is arranged on the aluminum silicate fiberboard 5 below the hearth 4;
As a preferred embodiment, the filling material comprises refractory material particles with different particle sizes, fine powder and an organic solvent, the double-layer stirrer 21 is used for stirring and mixing the filling material into slurry, the double-layer stirrer 21 is divided into an upper layer and a lower layer which can run simultaneously, the bottom of the upper layer of the double-layer stirrer 21 is provided with a closable discharging hole, the lower layer of the double-layer stirrer is provided with a discharging hole, and the discharging hole is provided with an anti-blocking filter valve. The upper strata of double-deck agitator is a mud stirring, and the lower floor of double-deck agitator is secondary mud material stirring and storage, and the upper strata stirring is accomplished the back, opens the blowing hole, and mud gets into the lower floor, continues to stir and wait for the use on the lower floor, and the stopping is continuously put into on the upper strata and is stirred, and incessant mud material supply can be realized to this process of repetition, prevents stifled strainer valve and prevents that the stirring is inhomogeneous to cause the jam for the pipeline.
As a preferred embodiment, be equipped with a feed inlet and a plurality of discharge gate on the shunt 23, the discharge gate generally is equipped with 4 ~ 12, all be equipped with on the discharge gate and adjust trip valve 231, generally use the ball valve, can adjust the size also can close the circulation, here need notice, when carrying out the press-in test through vertical arc heating furnace, only need use a mud conveyer pipe to connect can, other discharge gates are closed through cutting off the governing valve. When the converter bottom is actually replaced, the converter bottom is provided with a plurality of slurry injection pipes, and the discharge port on the shunt can be respectively connected with one slurry injection pipe through a plurality of slurry conveying pipes for injection.
As a preferred embodiment, the two ends of the slurry conveying pipe are provided with quick connectors, so that the cutting regulating valve 231 on the shunt and the cutting valve 141 on the slurry injection pipe can be conveniently connected, and quick connection and replacement can be realized. Preferably, the length of the slurry conveying pipe between the special pressing pump and the flow divider is 10-30 meters, and the length of the slurry conveying pipe between the flow divider and the slurry injection pipe is 1-6 meters.
As a preferred embodiment, 1 both sides of furnace body articulate respectively has 2 rotatable screw thread hand wheels 151, still is fixed with 1 respectively and stabilizes nail 161, the both sides of arc are fixed with 2 thread groove 152 and 1 steady nail hole 162 respectively, bell 3 is fixed with furnace body 1 through screw thread hand wheel 151 and thread groove 152, steady nail 161 and steady nail hole 162, can form an arc gap 20 between bell and the furnace body, and this testing arrangement imitates the annular gap between stove bottom and the furnace body in the actual production environment with the arc gap, and U type groove 12 is 50mm wide, and consequently the width in arc gap also is 50 mm.
As a preferred embodiment, 4 rows of steel column bases 171 are fixed at the bottom of the furnace body 1, and 4 sets of universal wheels 172 are arranged at the bottom of the furnace cover, so that the furnace cover can be moved conveniently, and the furnace cover and the furnace body can be assembled and fixed conveniently.
In a preferred embodiment, the control cabinet 24 is provided with a control system of a heating assembly, the heating assembly is controlled by the control cabinet to heat the furnace body, and the heating assembly passes through the glass fiber heat insulation material 6 and the outer wall of the furnace body 1 through a lead and is electrically connected with the control cabinet.
In a preferred embodiment, as shown in fig. 1, the double-layer mixer 21 is connected to the special pressing pump 22 through a PVC transparent steel wire plastic pipe, the maximum working pressure of the special pressing pump 22 used in this embodiment is 8MPa, the special pressing pump 22 is connected to the diverter through a slurry delivery pipe (high-pressure steel wire woven rubber pipe) during the test, and a discharge port of the diverter 23 is connected to the slurry injection pipe 14 on the U-shaped groove through a slurry delivery pipe 232.
In a preferred embodiment, the following steps are performed by a testing device of the converter live hearth filler during the test:
a, preparing, namely coating a layer of refractory thin material on the outer vertical surfaces of a magnesia carbon brick 18 and a high-alumina refractory brick 7, coating a layer of refractory thin material on the convex surface of a furnace cover 2, drying, then pasting a layer of refractory heat-preservation glass wool 19 with the thickness of 50mm on the upper edge of the furnace cover, wherein the refractory thin material is formed by mixing an organic solvent and magnesia fine powder and has the functions of conveniently cleaning filler slurry solidified in the subsequent process, and the refractory heat-preservation glass wool has the functions of shielding an arc gap above a heating furnace, avoiding heat loss and slowly raising the temperature;
b, a furnace cover 2 is closed on a furnace body 1, a stable nail 161 passes through a stable nail hole 162, a threaded hand wheel 151 is closed on a threaded groove 152, the furnace cover and the furnace body are firmly fixed by rotating the threaded hand wheel, an arc-shaped gap is formed between the furnace cover and the furnace body, then a double-layer stirring machine 21 is connected with a special pressing-in pump 22 through a guide pipe, the special pressing-in pump is connected with a feeding hole of a flow divider through a slurry conveying pipe, and a discharging hole on the flow divider is connected with a slurry injection pipe on a U-shaped groove through the slurry conveying pipe;
c, starting a power supply of a control cabinet 24, setting a test temperature value, starting heating the furnace body by a heating sheet in the hearth, keeping constant temperature when the temperature in the furnace body reaches a set value, adding furnace bottom filler into the double-layer stirrer 21, and starting slurry mixing;
d, dismantling the refractory heat-preservation glass wool 19 in the step A, then starting a special pressing pump 22 to work, injecting the mixed slurry into the arc-shaped gap through a flow divider and a slurry injection pipe 14, observing the upper opening of the arc-shaped gap between the furnace body and the furnace cover until the arc-shaped gap is full of the slurry, closing the special pressing pump, closing a stop valve of the slurry injection pipe, disconnecting a slurry conveying pipe, and stopping heating of a heating plate;
e, waiting for the furnace body to naturally cool to the room temperature, then opening the furnace cover, checking the test result, detecting the strength of the solidified filling material slurry, and if the strength of the solidified slurry is not lower than 10MPa and the volume density is not lower than 1.8g/cm3And if the slurry is uniformly distributed, the test is qualified, otherwise, the test result is unqualified.
The test device is reasonable in structure and cost-saving, the actual circular converter and the actual circular furnace body are simulated through the arc-shaped furnace body and the furnace cover, the annular gap formed between the arc-shaped furnace body and the furnace cover is simulated through the arc-shaped gap formed between the arc-shaped furnace body and the furnace cover, the test environment is basically similar to the actual construction environment, and the accuracy and the stability of the test process are guaranteed.
By adopting the jacking joint test under different temperature environments, the proportion of the filler (namely refractory material particles, fine powder and organic solvent with different particle sizes) can be accurately mastered, the adaptability of equipment and a construction process can be tested, the feasibility of site construction is verified, and the quality assurance of the construction process is confirmed, so that correct arrangement is made for site construction, and the construction safety is ensured
Example 2:
in actual production environment, the construction time for hot replacement and masonry of the bottom of the transfer furnace is different, the old bottom needs to be disassembled first, then the new bottom is fitted in the furnace body, the temperature in the annular gap formed by the bottom and the furnace body is different, the temperature in the annular gap is estimated to be about 200 plus 800 ℃, therefore, the company can set 3 temperatures to test the same filler in the test,
1. the replacement time of the converter bottom of the on-site converter is longer, and the temperature in the annular gap in the converter is estimated to be about 200 ℃ after the building is finished;
2. the replacement time of the converter bottom of the on-site converter is basically normal, and the annular gap in the converter is estimated to be about 400 ℃ after the construction is finished;
3. the replacement time of the converter bottom on site is short, the construction speed is high, and the temperature in the annular gap in the converter is estimated to be about 600 ℃ after the construction is finished.
Aiming at the condition that the replacement time of the converter bottom of the on-site converter is longer and the temperature in the annular gap in the converter is estimated to be about 200 ℃ after the building is finished, the test implementation method comprises the following steps:
and (3) coating a layer of refractory thin material on the concave surface of the magnesia carbon brick and the convex surface of the furnace cover, drying, adhering a layer of refractory heat-preservation glass wool with the thickness of 50mm to the upper edge of the furnace cover, and then firmly fixing the furnace cover and the furnace body. Starting a power supply of the control cabinet, and setting the electric heating time of the vertical arc electric heating furnace and the temperature control parameters of the thermocouple on the heating piece as follows through the control cabinet:
temperature-rise time and temperature control parameter table of vertical arc electric heating furnace
Preparation work:
a discharge hole of a double-layer stirring machine 21 is connected with a slurry sucking hole of a special pressing-in pump 22 through a PVC transparent steel wire plastic pipe, the special pressing-in pump 22 is connected with a flow divider through a slurry conveying pipe (a high-pressure steel wire woven rubber pipe), a discharge hole on the flow divider 23 is connected with a slurry injection pipe 14 on a U-shaped groove through a slurry conveying pipe 232, and the testing equipment is in a normal state.
Mixing slurry:
and (3) starting the double-layer stirrer when the electric heating furnace is in the later stage of the program 4, slowly adding the powder material of the filler and the organic solvent according to the proportion, uniformly mixing, taking 800ml of slurry for a fluidity test, and carrying out the next step when the fluidity value is 270-280 mm, wherein the slurry is qualified.
And (3) material ejection test:
checking the running state of the special pressing pump to ensure the normal running state; dismantling the refractory heat-preservation glass wool adhered to the upper edge of the furnace cover, opening the special press-in pump to perform slurry injection jacking test after the completion, observing the slurry rising condition of the through upper opening of the arc gap between the furnace body and the furnace cover of the vertical arc electric heating furnace, stopping the operation of the press-in pump after the arc gap is fully jacked, closing the stop valve of the slurry injection pipe, stopping heating, and removing the special press-in pump slurry conveying pipeline.
Equipment cleaning:
and (3) after the slurry conveying pipeline of the special pressing-in pump is detached, injecting water into the slurry stirring barrel, starting the special pressing-in pump, ejecting slurry in all the conveying pipelines and the special pressing-in pump by using water, and cleaning by using clean water.
And (4) checking test results:
waiting for the furnace body to be naturalCooling to room temperature, opening the furnace cover, checking the test result, and detecting the strength and density of the cured slurry, wherein if the strength of the cured slurry is not less than 10MPa and the bulk density is not less than 1.8g/cm3And if the slurry is uniformly distributed, the filler is qualified in proportion and construction, otherwise, the test result is unqualified.
Example 3:
aiming at the condition that the replacement time of the converter bottom of the on-site converter is basically normal and the temperature in the annular gap in the converter is estimated to be about 400 ℃ after the building is finished, the test implementation method comprises the following steps:
and (3) coating a layer of refractory thin material on the concave surface of the magnesia carbon brick and the convex surface of the furnace cover, drying, adhering a layer of refractory heat-preservation glass wool with the thickness of 50mm to the upper edge of the furnace cover, and then firmly fixing the furnace cover and the furnace body. Starting a power supply of the control cabinet, and setting the electric heating time of the vertical arc electric heating furnace and the temperature control parameters of the thermocouple on the heating piece as follows through the control cabinet:
temperature-rise time and temperature control parameter table of vertical arc electric heating furnace
Preparation work:
a discharge hole of a double-layer stirring machine 21 is connected with a slurry sucking hole of a special pressing-in pump 22 through a PVC transparent steel wire plastic pipe, the special pressing-in pump 22 is connected with a flow divider through a slurry conveying pipe (a high-pressure steel wire woven rubber pipe), a discharge hole on the flow divider 23 is connected with a slurry injection pipe 14 on a U-shaped groove through a slurry conveying pipe 232, and the testing equipment is in a normal state.
Mixing slurry:
and (3) starting the double-layer stirrer when the electric heating furnace is in the later stage of the program 4, slowly adding the powder material of the filler and the organic solvent according to the proportion, uniformly mixing, taking 800ml of slurry for a fluidity test, and carrying out the next step when the fluidity value is 270-280 mm, wherein the slurry is qualified.
And (3) material ejection test:
checking the running state of the special pressing pump to ensure the normal running state; dismantling the refractory heat-preservation glass wool adhered to the upper edge of the furnace cover, opening the special press-in pump to perform slurry injection jacking test after the completion, observing the slurry rising condition of the through upper opening of the arc gap between the furnace body and the furnace cover of the vertical arc electric heating furnace, stopping the operation of the press-in pump after the arc gap is fully jacked, closing the stop valve of the slurry injection pipe, stopping heating, and removing the special press-in pump slurry conveying pipeline.
Equipment cleaning:
and (3) after the slurry conveying pipeline of the special pressing-in pump is detached, injecting water into the slurry stirring barrel, starting the special pressing-in pump, ejecting slurry in all the conveying pipelines and the special pressing-in pump by using water, and cleaning by using clean water.
And (4) checking test results:
waiting for the furnace body to naturally cool to room temperature, then opening the furnace cover, checking the test result, detecting the strength and density of the solidified filling material slurry, and if the strength of the solidified slurry is not less than 10MPa and the bulk density is not less than 1.8g/cm3And if the slurry is uniformly distributed, the filler is qualified in proportion and construction, otherwise, the test result is unqualified.
Example 4:
aiming at the conditions that the replacement time of the converter bottom of the on-site converter is short, the construction speed is high, and the temperature in the annular gap in the converter is estimated to be about 600 ℃ after the construction is finished, the test implementation method comprises the following steps:
and (3) coating a layer of refractory thin material on the concave surface of the magnesia carbon brick and the convex surface of the furnace cover, drying, adhering a layer of refractory heat-preservation glass wool with the thickness of 50mm to the upper edge of the furnace cover, and then firmly fixing the furnace cover and the furnace body. Starting a power supply of the control cabinet, and setting the electric heating time of the vertical arc electric heating furnace and the temperature control parameters of the thermocouple on the heating piece as follows through the control cabinet:
temperature-rise time and temperature control parameter table of vertical arc electric heating furnace
Preparation work:
a discharge hole of a double-layer stirring machine 21 is connected with a slurry sucking hole of a special pressing-in pump 22 through a PVC transparent steel wire plastic pipe, the special pressing-in pump 22 is connected with a flow divider through a slurry conveying pipe (a high-pressure steel wire woven rubber pipe), a discharge hole on the flow divider 23 is connected with a slurry injection pipe 14 on a U-shaped groove through a slurry conveying pipe 232, and the testing equipment is in a normal state.
Mixing slurry:
and (3) starting the double-layer stirrer when the electric heating furnace is in the later stage of the program 4, slowly adding the powder material of the filler and the organic solvent according to the proportion, uniformly mixing, taking 800ml of slurry for a fluidity test, and carrying out the next step when the fluidity value is 270-280 mm, wherein the slurry is qualified.
And (3) material ejection test:
checking the running state of the special pressing pump to ensure the normal running state; dismantling the refractory heat-preservation glass wool adhered to the upper edge of the furnace cover, opening the special press-in pump to perform slurry injection jacking test after the completion, observing the slurry rising condition of the through upper opening of the arc gap between the furnace body and the furnace cover of the vertical arc electric heating furnace, stopping the operation of the press-in pump after the arc gap is fully jacked, closing the stop valve of the slurry injection pipe, stopping heating, and removing the special press-in pump slurry conveying pipeline.
Equipment cleaning:
and (3) after the slurry conveying pipeline of the special pressing-in pump is detached, injecting water into the slurry stirring barrel, starting the special pressing-in pump, ejecting slurry in all the conveying pipelines and the special pressing-in pump by using water, and cleaning by using clean water.
And (4) checking test results:
waiting for the furnace body to naturally cool to room temperature, then opening the furnace cover, checking the test result, detecting the strength and density of the solidified filling material slurry, and if the strength of the solidified slurry is not less than 10MPa and the bulk density is not less than 1.8g/cm3And if the slurry is uniformly distributed, the filler is qualified in proportion and construction, otherwise, the test result is unqualified.
Example 5:
as shown in fig. 7, the invention also provides a press-in device for the converter live hearth filler, which comprises a double-layer mixer 21, a special press-in pump 22, a flow divider 23 and a slurry conveying pipe 232, wherein the flow divider is provided with 1 feed inlet and 4-12 discharge outlets, each discharge outlet is provided with a cutting regulating valve, the double-layer mixer 21 is connected with the special press-in pump 22 through a guide pipe, the special press-in pump is connected with the feed inlet of the flow divider 23 through the slurry conveying pipe, each discharge outlet on the flow divider is connected with the slurry conveying pipe 232, and the slurry conveying pipes are further connected with a slurry injection pipe on the converter 25.
In the actual process of heat exchange of the converter bottom, an annular gap exists between the converter bottom and the converter body, the converter bottom actually has a plurality of slurry injection pipes, each discharge port of the flow divider 23 is provided with a cutting adjusting valve 231, the discharge ports can be respectively connected with one slurry injection pipe through a plurality of slurry conveying pipes, then the plurality of slurry injection pipes simultaneously inject slurry into the annular gap of the converter, so that the slurry injection is uniform, and here, a stop valve 141 is also arranged on each slurry injection pipe.
The flow divider can also adjust the mud flow of each mud press-in pipe through cutting off the adjusting valve, and the mud injection condition in the annular gap at the bottom of the furnace is adjusted, so that the mud injection is more uniform. In addition, if blockage or failure occurs, the two ends of each slurry conveying pipe are respectively provided with a quick connector, and the stop valve and the regulating valve can be closed at any time to be quickly replaced.
The present invention is not described in detail, but is known to those skilled in the art. Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.
Claims (10)
1. The utility model provides a test device of converter live stove bottom stopping material which characterized in that: comprises a control cabinet, a double-layer stirrer, a special pressing pump, a flow divider, a slurry delivery pipe and a vertical arc-shaped electric heating furnace, wherein the vertical arc-shaped electric heating furnace comprises a furnace body, a heating component in the furnace and a furnace cover,
the furnace body is a vertical arc-shaped steel box shell, an arc-shaped furnace groove is formed in the concave side of the furnace body, glass fiber heat-insulating materials are attached to the wall of the furnace groove, an aluminum silicate fiber board is built in the furnace groove, an arc-shaped groove-shaped hearth is also built on the aluminum silicate fiber board, a high-aluminum refractory brick is built at the bottom of the furnace groove, the outer vertical surface of the high-aluminum refractory brick is flush with the outer vertical surface of the lower edge of the furnace body, an arc-shaped table surface is formed on the upper portion of the high-aluminum refractory brick, a vertical magnesia carbon brick is built on the arc-shaped table surface, the upper edge of the magnesia carbon brick is close to the glass fiber heat-insulating materials on the upper wall of the furnace groove, the hearth is completely sealed, and the outer vertical surface of the magnesia carbon brick is flush with the outer vertical surface of the high-aluminum refractory brick;
the heating assembly in the furnace comprises a heating plate and 3 thermocouples, wherein the heating plate is arranged on the wall of the hearth, one of the 3 thermocouples is arranged on the heating plate, one thermocouple is arranged at the bottom of the heating plate, and the other thermocouple is arranged on an aluminum silicate fiberboard below the hearth;
the bell is vertical curved steel bell, includes the arc and fixes the reinforcement at the arc concave surface, both ends and bottom welding have U type groove about the arc convex surface, all be equipped with graphite packing on the U type groove lateral wall, the intermediate position in the U type groove of arc bottom is equipped with the mud filling pipe, be equipped with the trip valve on the mud filling pipe.
2. The testing device of the converter live bottom filling material according to claim 1, characterized in that: the double-layer mixer is divided into an upper layer and a lower layer which can run simultaneously, the bottom of the upper layer of the double-layer mixer is provided with a closable discharging hole, the lower layer of the double-layer mixer is provided with a discharging hole, and the discharging hole is provided with an anti-blocking filter valve.
3. The testing device of the converter live bottom filling material according to claim 1, characterized in that: the flow divider is provided with a feed inlet and a plurality of discharge outlets, and the discharge outlets are provided with cut-off regulating valves.
4. The testing device of the converter live bottom filling material according to claim 1, characterized in that: and quick connectors are arranged at two ends of the slurry conveying pipe.
5. The testing device of the converter live bottom filling material according to claim 3, characterized in that: the double-layer stirring machine is connected with a special pressing-in pump through a guide pipe, the special pressing-in pump is connected with a feeding hole of the flow divider through a slurry conveying pipe, and a discharging hole in the flow divider is connected with a slurry injection pipe in the U-shaped groove through the slurry conveying pipe.
6. The testing device of the converter live bottom filling material according to claim 1, characterized in that: the furnace body both sides articulate respectively 2 rotatable screw thread hand wheels, are fixed with 1 respectively and stabilize the nail, the both sides of arc are fixed with 2 thread grooves, 1 nail hole of stabilizing respectively.
7. The testing device of the converter live bottom filling material according to claim 1, characterized in that: the furnace cover is fixed with the furnace body through the threaded hand wheel, the threaded groove, the stable nail and the stable nail hole, and an arc-shaped gap is formed between the furnace cover and the furnace body.
8. The testing device of the converter live bottom filling material according to claim 1, characterized in that: the control cabinet is provided with a control system of a heating assembly, and the heating assembly penetrates through the glass fiber heat-insulating material and the outer wall of the furnace body through a wire to be electrically connected with the control cabinet.
9. A press-in test method of a converter live bottom filler, characterized in that the test apparatus of the converter live bottom filler according to claim 1 is used for carrying out the following steps:
A. preparing, namely coating a layer of refractory thin material on the outer vertical surfaces of the magnesia carbon bricks and the high-alumina refractory bricks, coating a layer of refractory thin material on the convex surface of the furnace cover, airing, and then pasting a layer of refractory heat-preservation glass wool with the thickness of 50mm on the upper edge of the furnace cover;
B. the furnace cover is combined with the furnace body, the stable nail penetrates through the stable nail hole, the threaded hand wheel is combined on the threaded groove, the threaded hand wheel is rotated to fix the furnace cover and the furnace body firmly, an arc-shaped gap is formed between the furnace cover and the furnace body, then the double-layer stirring machine is connected with a special pressing-in pump through a guide pipe, the special pressing-in pump is connected with a feeding hole of a flow divider through a slurry conveying pipe, and a discharging hole in the flow divider is connected with a slurry injection pipe in the U-shaped groove through the slurry conveying pipe;
C. starting a power supply of a control cabinet, setting a temperature value, starting heating the furnace body by a heating sheet in the hearth, keeping constant temperature when the temperature in the furnace body reaches the set value, adding furnace bottom filler into a double-layer stirrer, and starting slurry mixing;
D. and D, dismantling the refractory heat-preservation glass wool in the step A, then starting a special pressing-in pump to work, injecting the mixed slurry into the arc-shaped gap through a flow divider and a slurry injection pipe, observing the upper opening of the arc-shaped gap between the furnace body and the furnace cover until the slurry is fully pushed into the arc-shaped gap, closing the special pressing-in pump, closing a stop valve of the slurry injection pipe, disconnecting the slurry conveying pipe, and stopping heating of the heating plate.
E. After the furnace body is naturally cooled to room temperature, the furnace cover is opened, the test result can be checked, the strength of the solidified slurry is not lower than 10MPa, and the volume density is not lower than 1.8g/cm3And the test is successful if the slurry is uniformly distributed.
10. The press-in device for the converter live bottom filler is characterized in that: including double-deck mixer, special pump, shunt and the mud conveyer pipe of impressing, be equipped with 1 feed inlet and 4 ~ 12 discharge gates on the shunt, all be equipped with on the discharge gate and cut off the governing valve, double-deck mixer is connected with the special pump of impressing through the pipe, and the special pump of impressing is connected with the feed inlet of shunt through the mud conveyer pipe, also all is connected with the mud conveyer pipe on every discharge gate on the shunt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111582925.8A CN114231689B (en) | 2021-12-22 | 2021-12-22 | Pressing device, test device and test method for converter movable furnace bottom filling material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111582925.8A CN114231689B (en) | 2021-12-22 | 2021-12-22 | Pressing device, test device and test method for converter movable furnace bottom filling material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114231689A true CN114231689A (en) | 2022-03-25 |
| CN114231689B CN114231689B (en) | 2023-06-23 |
Family
ID=80761370
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111582925.8A Active CN114231689B (en) | 2021-12-22 | 2021-12-22 | Pressing device, test device and test method for converter movable furnace bottom filling material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114231689B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001303115A (en) * | 2000-04-25 | 2001-10-31 | Nippon Steel Corp | Method for operating rotary hearth type reduction furnace and reducing facility of metallic oxide |
| CN101748247A (en) * | 2008-12-09 | 2010-06-23 | 瓦房店金海轴承制造有限公司 | Energy-saving heat treatment well type heating furnace |
| CN105316461A (en) * | 2014-06-25 | 2016-02-10 | 高俊杰 | Energy-saving heating furnace |
| CN205850673U (en) * | 2016-06-30 | 2017-01-04 | 山西省交通科学研究院 | A kind of building slurry Site conveyer |
| CN106868290A (en) * | 2017-03-23 | 2017-06-20 | 东北大学 | Al alloy parts heat treatment experiment method |
| CN108439958A (en) * | 2018-04-04 | 2018-08-24 | 首钢集团有限公司 | A kind of converter bottom hot swap seam refractory material and construction method |
| CN109059559A (en) * | 2018-09-18 | 2018-12-21 | 平顶山东方碳素股份有限公司 | A kind of vertical electric heating hot air circulation preheating furnace |
| CN109231007A (en) * | 2018-10-28 | 2019-01-18 | 中国十九冶集团有限公司南京分公司 | A kind of electric furnace ontology handling, mounting process |
| CN110822905A (en) * | 2019-12-13 | 2020-02-21 | 中化二建集团有限公司 | Movable assembly type heating furnace capable of eliminating stress through electric heating in furnace and construction method thereof |
-
2021
- 2021-12-22 CN CN202111582925.8A patent/CN114231689B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001303115A (en) * | 2000-04-25 | 2001-10-31 | Nippon Steel Corp | Method for operating rotary hearth type reduction furnace and reducing facility of metallic oxide |
| CN101748247A (en) * | 2008-12-09 | 2010-06-23 | 瓦房店金海轴承制造有限公司 | Energy-saving heat treatment well type heating furnace |
| CN105316461A (en) * | 2014-06-25 | 2016-02-10 | 高俊杰 | Energy-saving heating furnace |
| CN205850673U (en) * | 2016-06-30 | 2017-01-04 | 山西省交通科学研究院 | A kind of building slurry Site conveyer |
| CN106868290A (en) * | 2017-03-23 | 2017-06-20 | 东北大学 | Al alloy parts heat treatment experiment method |
| CN108439958A (en) * | 2018-04-04 | 2018-08-24 | 首钢集团有限公司 | A kind of converter bottom hot swap seam refractory material and construction method |
| CN109059559A (en) * | 2018-09-18 | 2018-12-21 | 平顶山东方碳素股份有限公司 | A kind of vertical electric heating hot air circulation preheating furnace |
| CN109231007A (en) * | 2018-10-28 | 2019-01-18 | 中国十九冶集团有限公司南京分公司 | A kind of electric furnace ontology handling, mounting process |
| CN110822905A (en) * | 2019-12-13 | 2020-02-21 | 中化二建集团有限公司 | Movable assembly type heating furnace capable of eliminating stress through electric heating in furnace and construction method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114231689B (en) | 2023-06-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN114231689A (en) | Press-in device, test device and test method for converter live furnace bottom filler | |
| CN113604619A (en) | Remote control thermal state wet method jetting lining manufacturing method | |
| CN105268378A (en) | Salt melting system and method for applying salt melting system | |
| CN111500809A (en) | Cooling wall plugging process and plugging slurry | |
| CN104226509A (en) | Continuous wax injection device and application method thereof | |
| CN207615055U (en) | A kind of castable refractory half wet process paint finishing | |
| CN105603853A (en) | Novel waste pitch heating device | |
| CN213645774U (en) | Constant temperature heat preservation roller mill | |
| CN214871602U (en) | Cement production line cement automatic blending device | |
| CN112986053A (en) | Thermal-state repairing material fluidity test device and test method | |
| CN208794920U (en) | A kind of drying system with foamable function | |
| CN211227208U (en) | Pumping pouring repair equipment for converter tapping hole | |
| CN110653450B (en) | Online repairing method for converter body perforation | |
| CN203938642U (en) | A kind of coke oven peephole string leakage device of administering | |
| CN207622550U (en) | A kind of metallurgical furnace kiln waste heat recycle device | |
| CN110306000B (en) | Blowing-out method and spray gun device for blast furnace dissection research | |
| CN111442619A (en) | Positive-pressure hot-air heat-accumulating type alloy baking device | |
| CN201560206U (en) | Heat-resistant hot blast valve for hot-blast furnace | |
| CN220159730U (en) | Refractory brick raw materials stirring is with even dosing unit | |
| CN111377589B (en) | Automatic gas injection charging process for producing rock wool electric melting furnace | |
| CN110669897A (en) | Device and method for maintaining gap between nozzle and brick cup after bottom blowing quick change | |
| CN218915889U (en) | Lithium battery negative electrode material preparation high-temperature furnace capable of continuously producing | |
| CN108917361A (en) | A kind of drying system with foamable function | |
| CN105271635B (en) | A kind of optical glass continuous melting production line auto feed technique and device | |
| CN219338124U (en) | System for mixing plant controllable cold and hot water feeding |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |