A ladle bottom blowing non-burn-through gas brick core and a preparation method thereof

Abstract

The application belongs to the technical field of gas permeable brick cores, and specifically relates to a steel ladle bottom blowing non-burning gas permeable brick core and a preparation method thereof, which comprises a brick seat, an intermediate hole is formed in the central axis of the brick seat, and a brick core is arranged in the intermediate hole; a plurality of groups of insertion grooves are uniformly formed in the inner wall of the intermediate hole, a plurality of groups of transverse holes are uniformly arranged in the brick core, a gas discharge hole is communicated with the top of the transverse hole, a sliding block is slidably connected to the inside of the transverse hole, an elastic insertion rod is arranged at one end of the sliding block, and an elastic sleeve is arranged at the bottom of the elastic insertion rod; the device has high installation precision, high installation efficiency, high installation stability, simple operation, stable hoisting, effectively guarantees the stability and installation strength of the subsequent brick seat and brick core, can also introduce stable gas into the steel ladle, thereby removing impurities in the steel liquid in the steel ladle, has high impurity removal efficiency, good impurity removal effect, stable adsorption and impurity removal, meets actual installation and production requirements, saves energy and reduces emissions, and is green and environmentally friendly.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of gas permeable brick cores, and particularly relates to a steel ladle bottom blowing non-burning gas permeable brick core and a preparation method thereof. BACKGROUND

[0002] The steel ladle bottom blowing gas permeable brick is one of the most critical functional elements in steel ladle refining. In modern metallurgical technology, it is necessary to adopt inert gas blowing to purify molten steel and other metal melts. The gas is blown into the steel ladle mainly through the gas permeable brick, which is generally installed at the bottom of the refractory lining of the steel ladle. Its functions can be summarized as follows: adjusting the temperature of the steel ladle, uniforming the composition, and achieving the best pouring temperature for the existing process; through stirring, the alloy and deoxidizer in the steel ladle are uniformly distributed; non-metallic inclusions are brought into the slag to achieve the required cleanliness of the molten steel; and kinetic conditions are provided for the steel-slag interface reaction.

[0003] Chinese invention patent 2017109519686 provides a slit type steel ladle gas permeable brick, which comprises a circular truncated cone body, a slit group is arranged in the body, the slit group is composed of slits arranged in a ring array with the body axis as the center, the number of rings of the slit group is 2-3, the number of slits per ring of the slit group is 6-20, each slit is a through hole penetrating the upper and lower surfaces of the body, and the transverse section of the slit is an oval or a chamfered rectangle; the gas permeable effect of the gas permeable brick core is poor, the impurity removal efficiency of the molten steel in the steel ladle is low, and the actual production requirements cannot be met.

[0004] Chinese invention patent 2022104575303 discloses a steel ladle argon blowing gas permeable brick, which comprises a gas permeable brick core and a gas channel arranged on the gas permeable brick core; the gas permeable brick core is in the shape of a circular truncated cone; the gas channel comprises a ring-shaped gas outlet channel composed of a plurality of ring slits; the installation of the gas permeable brick is difficult, and the installation precision is low.

[0005] In the prior art, the gas permeable brick is assembled only by inserting and fixing the brick core in the middle hole of the brick seat at the bottom of the steel ladle. The assembly efficiency is low, the assembly precision is poor, and the brick core is very easy to slide in the middle hole of the brick seat, thereby easily affecting the impurity removal of the molten steel in the steel ladle.

[0006] When the molten steel in the steel ladle shakes or the impurities in the molten steel accumulate on one side of the top of the brick core, the molten steel will exert an unstable force on one side of the top of the brick core. Under the impact of the force, the brick core will shake and separate from the middle hole of the brick seat, thereby reducing the installation strength of the brick core. When the amount of impurities on the top of the brick core changes, the amount of stable gas discharged from the exhaust hole cannot completely and effectively remove the impurities, thereby causing the impurities to accumulate on one side of the top of the brick core and reducing the self-adaptive cleaning effect on the impurities in the molten steel.

[0007] When one exhaust hole is blocked by impurities after long time use, the stable gas inside the exhaust hole cannot be discharged smoothly, which not only reduces the cleaning efficiency of impurities in the molten steel, but also affects the stable insertion effect of the brick core inside the middle hole of the brick seat. SUMMARY

[0008] The present application is directed to the above problems, and the present application provides a ladle bottom blowing non-fired gas-permeable brick core and a preparation method thereof.

[0009] To achieve the above object, the present application provides the following technical scheme: a ladle bottom blowing non-fired gas-permeable brick core, comprising a brick seat, a middle hole is formed at the middle axis of the brick seat, and a brick core is arranged inside the middle hole;

[0010] A plurality of insertion slots are uniformly formed on the inner wall of the middle hole, a plurality of transverse holes are uniformly arranged inside the brick core, an exhaust hole is communicated with the top of the transverse hole, a sliding block is slidably connected inside the transverse hole, an elastic insertion rod is arranged at one end of the sliding block, an elastic sleeve is arranged at the bottom of the elastic insertion rod, a wrapping air bag is arranged at one end of the sliding block and on the outer surface of the elastic insertion rod, and the other end of the wrapping air bag is fixedly connected with the side wall of the transverse hole;

[0011] A plurality of sliding grooves are uniformly arranged inside the brick core, a bellows is arranged at the inner bottom of the sliding groove, a moving block is arranged at the top of the bellows, a vertical rod is arranged at the top of the moving block, a communication hose is communicated with the top of the wrapping air bag, and the other end of the communication hose penetrates through the brick core and is communicated with the bottom of the bellows;

[0012] A horizontal rod is arranged inside the exhaust hole, a connecting block is arranged at one end of the horizontal rod, and the other end of the connecting block is fixedly connected with the side wall of the moving block;

[0013] A matching hole is arranged at the top of the sliding groove, a piston block is slidably connected inside the matching hole, the bottom of the piston block is fixedly connected with the top of the vertical rod, a transverse hose is communicated with one side of the elastic sleeve, and the other end of the transverse hose penetrates through the wrapping air bag and the brick core and is communicated with the bottom of the matching hole.

[0014] The gas-permeable brick core not only improves the installation efficiency and installation precision, but also improves the elastic support performance of the brick core inside the middle hole of the brick seat, and adjusts the discharge amount of the stable gas inside the exhaust hole, so as to meet the self-adaptive impurity removal effect on the impurities in the molten steel; meanwhile, when the end of the exhaust hole is blocked, the vibration insertion of the breaking needle can also be used to clear the blockage, further improving the clearing effect of the exhaust hole.

[0015] Further, the top of the brick seat is uniformly provided with multiple groups of lifting rings, connecting curved rods are arranged between adjacent lifting rings, the intermediate hole and the brick core are matched in structure, the intermediate hole and the brick core are both conical structures, and the diameters of the intermediate hole and the brick core gradually increase from top to bottom.

[0016] Further, the other end of the exhaust hole penetrates the brick core and is connected with the outside, the bottom of the brick core is provided with a fixing tube, the outer surface of the bottom of the fixing tube is provided with external threads, the bottom of the transverse hole is connected with a connecting hole, the bottom of the connecting hole is connected with the top of the fixing tube, and the diameter of the exhaust hole is 3-5 wires.

[0017] Further, the width of the sliding block matches the width of the exhaust hole, the side wall of the sliding block is provided with an extrusion spring, the other end of the extrusion spring is fixedly connected with the side wall of the transverse hole, the extrusion spring is located between the elastic plug rod and the wrapped air bag, the other end of the elastic plug rod penetrates the brick core and matches the insertion slot, and the elastic plug rod is elastic.

[0018] Further, the bottom of the elastic sleeve is provided with an elastic gasket, the bottom of the elastic gasket matches the inner bottom of the transverse hole, and the bottom of the elastic plug rod is uniformly provided with multiple groups of return springs, the bottom of the return spring is fixedly connected with the top of the elastic gasket.

[0019] Further, the moving block is sealingly and slidably connected with the inner wall of the sliding groove, the bottom of the moving block is provided with a connecting spring, the bottom of the connecting spring is fixedly connected with the inner bottom of the sliding groove, and the connecting spring is located inside the bellows.

[0020] Further, one side of the sliding groove is provided with a side hole, the other end of the side hole is connected with the exhaust hole, the side wall of the side hole is symmetrically provided with two groups of elastic fit pieces, the ends of the elastic fit pieces facing each other are fit with each other, and the connecting block matches the ends of the two groups of elastic fit pieces facing each other.

[0021] Further, the width of the cross rod is smaller than the width of the exhaust hole, the inside of the cross rod is uniformly provided with multiple groups of air permeable holes, the top of the cross rod is uniformly provided with multiple groups of crushing needles, the inside of the crushing needle is provided with a flow-through hole, the flow-through hole is connected with the air permeable hole, and the crushing needle matches the end of the exhaust hole.

[0022] Further, the circumferential surface of the piston block is sealingly and slidably connected with the inner wall of the matching hole, the top of the piston block is provided with a top spring, the top of the top spring is fixedly connected with the inner top of the matching hole, one end of the transverse hose is located at one side of the top of the elastic sleeve, and the other end of the transverse hose is located at one side of the bottom of the matching hole.

[0023] The application discloses a preparation method of a ladle bottom blowing non-burned gas permeable brick core.

[0024] 1. First, various raw materials are weighed according to the proportion of the material of the brick core, the weighed various raw materials are added into a powerful sand mixer, water is added and stirred for 5-10 minutes, and a mixture is obtained;

[0025] 2. The mixture obtained in step 1 is placed in an assembled mold for vibration forming;

[0026] 3. The brick core formed in step 2 is placed into a dryer for drying, the drying temperature is 50-60 DEG C, and the drying time is 16-24 hours; the volume density of the dried brick core is controlled to be 3.1-3.3 g / cm3;

[0027] 4. The product dried in step 3 is placed into a kiln for burning, when the burning temperature reaches 500-600 DEG C, the temperature is kept for 8-10 hours; after the burning is completed, natural cooling is carried out, and the brick core is obtained after cooling.

[0028] The preparation efficiency is improved and the preparation effect is ensured through further limitation of the preparation method.

[0029] Compared with the prior art, the application has the following beneficial effects:

[0030] 1. The device has high installation precision, high installation efficiency, strong installation stability, simple operation and stable hoisting, effectively guarantees the stability and installation strength of the subsequent brick seat and brick core, can also introduce stable gas into the ladle, and carries out gas removal on the molten steel in the ladle, so that the removal efficiency is high, the removal effect is good, the adsorption removal is stable, the actual installation production demand is met, energy saving and emission reduction are realized, and the device is green and environment-friendly.

[0031] 2. The device effectively improves the installation efficiency of the brick seat and the brick core, has stronger matching, better clamping fixing effect, higher installation precision, simple operation, is convenient for subsequent replacement and maintenance, and has better installation adaptability and installation stability effect; when the force on the top side of the brick core increases, the elastic support effect on the side can be improved, the stability and supportability of the brick core in the middle hole of the brick seat are guaranteed, and the exhaust capacity of the exhaust hole on the side can also be correspondingly improved, so that the removal efficiency of the molten steel on the top of the brick core on the side is improved, the adaptability is stronger, and the removal efficiency is higher.

[0032] 3、The application is characterized in that the cooperation of the exhaust hole and the cross bar and other components is set, when the end of the exhaust hole is blocked, the end of the exhaust hole is broken and the blockage is cleared by the change of the internal air pressure of the cross hole, and the vibration blockage effect of the end of the exhaust hole is further improved by the cooperation of the volume change of the elastic sleeve and the up-down vibration of the brick core in the middle hole of the brick seat, the device has higher stability, stronger support, and better impurity removal efficiency and effect. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 It is a three-dimensional structure schematic diagram of the application;

[0034] Figure 2 It is a brick core structure schematic diagram of the application;

[0035] Figure 3 It is a front view sectional view schematic diagram of the application;

[0036] Figure 4 It is a second embodiment brick core structure schematic diagram of the application;

[0037] Figure 5 It is a second embodiment front view sectional view schematic diagram of the application;

[0038] Figure 6 It is Figure 5 An enlarged schematic diagram at A;

[0039] Figure 7 It is Figure 5 An enlarged schematic diagram at B;

[0040] Figure 8 It is Figure 5 An enlarged schematic diagram at C;

[0041] Figure 9 It is a second embodiment moving block structure schematic diagram of the application;

[0042] Figure 10 It is a second embodiment right view sectional view schematic diagram of the application.

[0043] In the figure; 1, the brick seat; 2, the lifting ring; 3, the middle hole; 4, the brick core; 5, the fixed tube; 6, the external thread; 7, the connecting hole; 8, the cross hole; 9, the exhaust hole; 10, the sliding block; 11, the wrapped air bag; 12, the elastic insertion rod; 13, the extrusion spring; 14, the elastic sleeve; 15, the reset spring; 16, the communication hose; 17, the insertion slot; 18, the sliding slot; 19, the corrugated tube; 20, the connecting spring; 21, the moving block; 22, the elastic lamination; 23, the connecting block; 24, the cross bar; 25, the air hole; 26, the broken needle; 27, the vertical rod; 28, the matching hole; 29, the piston block; 30, the transverse hose; 31, the elastic gasket; 32, the top spring; 33, the side hole. Detailed Implementation

[0044] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. Example 1

[0045] like Figures 1-3 As shown, a bottom-blown, non-fired, permeable brick core for steel ladles includes a brick base 1 with a central hole 3 at its central axis. A brick core 4 is placed inside the central hole 3. The brick base 1 is installed and spliced ​​at the bottom of the steel ladle to improve installation accuracy and efficiency. The central hole 3 is used to fix the brick core 4. The main function of the brick core 4 is to introduce a stable gas, such as argon, into the steel ladle. The vacuum environment created by the stable gas moving upward and exiting the ladle not only effectively improves the removal of impurities from the molten steel but also breaks up and removes air bubbles, thereby improving the production quality and efficiency of the molten steel in the ladle. This is the simplest and most efficient method for molten steel production.

[0046] Multiple sets of lifting rings 2 are evenly provided on the top of the brick base 1, and connecting rods are provided between adjacent lifting rings 2. The setting of lifting rings 2 improves the stability and efficiency of lifting the brick base 1. The structure of the middle hole 3 and the brick core 4 are matched, so the brick core 4 is directly spliced ​​into the middle hole 3 for installation. Both the middle hole 3 and the brick core 4 are conical structures, and the diameter of the middle hole 3 and the brick core 4 gradually increases from top to bottom. This structure setting further improves the convenience of replacing the brick core 4 inside the middle hole 3 and ensures the efficiency of subsequent use.

[0047] The brick core 4 has multiple sets of horizontal holes 8 evenly distributed inside. The top of the horizontal holes 8 is connected to an exhaust hole 9. The other end of the exhaust hole 9 passes through the brick core 4 and is connected to the outside. The stable gas inside the exhaust hole 9 can be discharged along the top and remove impurities from the molten steel inside the ladle. The bottom of the brick core 4 is provided with a fixed pipe 5. The bottom outer surface of the fixed pipe 5 is provided with an external thread 6. The external thread 6 improves the connection stability between the fixed pipe 5 and the external air inlet pipe. The bottom of the horizontal holes 8 is connected to a connecting hole 7. The bottom of the connecting hole 7 is connected to the top of the fixed pipe 5. The stable gas introduced into the fixed pipe 5 is discharged into the ladle along the connecting hole 7, the horizontal holes 8 and the exhaust hole 9. The diameter of the exhaust hole 9 is 3 to 5 microns. This setting prevents the molten steel inside the ladle from flowing back into the exhaust hole 9 and causing blockage.

[0048] In use, the brick seat 1 is assembled on the inner bottom of the ladle by means of the lifting ring 2 according to requirements, meanwhile the brick core 4 is inserted into the brick seat 1 along the middle hole 3, and the external air inlet pipe is connected with the fixed pipe 5 by means of the external thread 6, thereby completing the installation of the brick seat 1 and the brick core 4, when it is needed to remove the impurities in the steel liquid in the ladle, the external air inlet pipe is connected with the fixed pipe 5, and the stable gas is introduced into the fixed pipe 5, and the stable gas enters the ladle along the connecting hole 7, the horizontal hole 8 and the exhaust hole 9, and the impurities and bubbles in the ladle are wrapped and adsorbed, and finally the impurities are discharged along the top of the ladle, thereby effectively improving the cleaning effect of the steel liquid in the ladle.

[0049] The device has high installation precision, high installation efficiency, strong installation stability, simple operation, stable lifting, effectively guarantees the stability and installation strength of the subsequent brick seat 1 and brick core 4, and can also stably introduce stable gas into the ladle, thereby removing the impurities in the steel liquid in the ladle, and the device has high removal efficiency, good removal effect, stable adsorption and removal, meets the actual installation and production requirements, saves energy and reduces emissions, and is green and environmentally friendly. Embodiment two

[0050] As shown in Figures 4-10 When the steel liquid in the ladle is actually removed, only the clamping of the brick seat 1 and the brick core 4 cannot realize the stable fixing of the two, and the brick core 4 is easy to shake and separate in the middle hole 3 of the brick seat 1; meanwhile, when the steel liquid in the ladle shakes or the impurities in the steel liquid accumulate on one side of the top of the brick core 4, the steel liquid will exert unstable force on the top of the brick core 4, which is easy to drive the brick core 4 to shake and separate in the middle hole 3 of the brick seat 1 under the impact of the force; and when the content of the steel liquid or the amount of impurities on the top of the brick core 4 changes, the stable exhaust of the exhaust hole 9 cannot quickly and efficiently remove the impurities in the steel liquid, thereby reducing the self-adaptive adjustment and cleaning function of the impurities in the steel liquid; and when the exhaust hole 9 is blocked by impurities, the stable gas in the exhaust hole 9 cannot be discharged, which not only directly affects the removal effect of the steel liquid in the subsequent ladle, but also affects the stability of the brick core 4.

[0051] In order to solve the above problems, the ladle bottom blowing non-burning through gas brick core also includes: the inner wall of the middle hole 3 is uniformly provided with a plurality of insertion grooves 17, the insertion groove 17 improves the insertion and fixing effect of the brick core 4 and the brick seat 1, the inner part of the horizontal hole 8 is slidably connected with a sliding block 10, the width value of the sliding block 10 matches the width value of the exhaust hole 9, the sliding block 10 can move inside the horizontal hole 8, and in the initial state, the sliding block 10 is located at the bottom of the exhaust hole 9 and blocks the exhaust hole 9, which ensures that in the non-working state of the brick core 4, the dust and impurities in the external environment cannot flow back to the inside of the horizontal hole 8 and hinder the normal work of the sliding block 10, one end of the sliding block 10 is provided with an elastic insertion rod 12, the other end of the elastic insertion rod 12 passes through the brick core 4 and matches the insertion groove 17, and then when the gas is introduced into the horizontal hole 8, the sliding block 10 will be driven to move inside the horizontal hole 8, and the sliding block 10 drives the elastic insertion rod 12 to move and insert into the insertion groove 17 for insertion and fixing.

[0052] The bottom of the elastic insertion rod 12 is provided with an elastic sleeve 14, the elastic insertion rod 12 has elasticity, the setting of the elastic sleeve 14 improves the elastic support effect of the elastic insertion rod 12 inside the insertion groove 17, and further ensures that when one side of the top of the brick core 4 is subjected to extrusion force, the reverse elastic support effect is provided, one end of the sliding block 10 and located on the outer surface of the elastic insertion rod 12 is provided with a wrapping air bag 11, the other end of the wrapping air bag 11 is fixedly connected with the side wall of the horizontal hole 8, when the sliding block 10 moves, the wrapping air bag 11 is synchronously extruded, the gas inside the wrapping air bag 11 is circulated when it is extruded, the side wall of the sliding block 10 is provided with an extrusion spring 13, the other end of the extrusion spring 13 is fixedly connected with the side wall of the horizontal hole 8, the extrusion spring 13 is located between the elastic insertion rod 12 and the wrapping air bag 11, and the setting of the extrusion spring 13 further improves the elastic reset performance of the sliding block 10.

[0053] The bottom of the elastic sleeve 14 is provided with an elastic gasket 31, the bottom of the elastic gasket 31 matches the inner bottom of the horizontal hole 8, the setting of the elastic gasket 31 improves the elastic support effect of the inner bottom of the insertion groove 17, avoids extrusion deformation of the elastic insertion rod 12 inside the insertion groove 17, and reduces the clamping and fixing effect, the bottom of the elastic insertion rod 12 is uniformly provided with a plurality of reset springs 15, the bottom of the reset spring 15 is fixedly connected with the top of the elastic gasket 31, the setting of the reset spring 15 further improves the elastic support performance of the elastic insertion rod 12, and ensures the stability of the elastic insertion rod 12.

[0054] The inside of the brick core 4 is uniformly provided with a plurality of groups of sliding grooves 18, the inner bottom of the sliding groove 18 is provided with a bellows 19, the top of the bellows 19 is provided with a moving block 21, the moving block 21 is in sealing sliding connection with the inner wall of the sliding groove 18, then when the volume of the bellows 19 increases, the moving block 21 will be driven to move upwards in the sliding groove 18, the bottom of the moving block 21 is provided with a connecting spring 20, the bottom of the connecting spring 20 is fixedly connected with the inner bottom of the sliding groove 18, the connecting spring 20 is located in the bellows 19, the setting of the connecting spring 20 further improves the elastic reset performance of the moving block 21, the top of the moving block 21 is provided with a vertical rod 27, then when the moving block 21 moves upwards, the vertical rod 27 is synchronously driven to move upwards.

[0055] The top of the wrapping air bag 11 is communicated with a communication hose 16, the other end of the communication hose 16 penetrates through the brick core 4 and is communicated with the bottom of the bellows 19, then when the wrapping air bag 11 is extruded, the gas in the inside enters the inside of the bellows 19 along the communication hose 16, the volume of the bellows 19 increases and drives the moving block 21 at the top to move upwards along the sliding groove 18.

[0056] The inside of the exhaust hole 9 is provided with a horizontal rod 24, one end of the horizontal rod 24 is provided with a connecting block 23, the other end of the connecting block 23 is fixedly connected with the side wall of the moving block 21, then when the moving block 21 moves upwards in the sliding groove 18, the moving block 21 drives the horizontal rod 24 to move upwards in the exhaust hole 9 through the connecting block 23, and one side of the sliding groove 18 is provided with a side hole 33, the other end of the side hole 33 is communicated with the exhaust hole 9, the setting of the side hole 33 realizes the sealing movement effect of the connecting block 23, the side wall of the side hole 33 is symmetrically provided with two groups of elastic lamination pieces 22, the ends of the two elastic lamination pieces 22 facing each other are mutually laminated, the connecting block 23 is matched with the ends of the two elastic lamination pieces 22 facing each other, the contact sealing of the side hole 33 is realized by means of the elastic lamination piece 22, this setting has the effect of curtain, when the moving block 21 drives the connecting block 23 to move upwards, the connecting block 23 pushes away the connecting position of the two elastic lamination pieces 22, while the remaining positions of the side hole 33 are tightly laminated by the end faces of the two elastic lamination pieces 22 facing each other, the stable gas in the inside of the exhaust hole 9 cannot enter the inside of the sliding groove 18 along the side hole 33 and cause hindrance to the movement of the moving block 21.

[0057] The width of the crossbar 24 is smaller than the width of the exhaust hole 9, so the crossbar 24 does not hinder the normal flow of stable gas inside the exhaust hole 9. The crossbar 24 is uniformly provided with multiple groups of air holes 25 inside. The air holes 25 further improve the stability and smoothness of the stable gas flow inside the exhaust hole 9. The top of the crossbar 24 is uniformly provided with multiple groups of breaking needles 26. The breaking needles 26 are matched with the end of the exhaust hole 9, and the breaking needles 26 are provided with flow holes inside, which are matched with the air holes 25. When the top of the exhaust hole 9 is blocked by impurities, the moving block 21 drives the crossbar 24 to move upward to the maximum distance through the connecting block 23. The crossbar 24 drives the multiple groups of breaking needles 26 at the top to move upward to the maximum distance and quickly insert and break the impurities blocked at the top of the exhaust hole 9. Part of the stable gas can be discharged through the air holes 25 and the flow holes, thereby realizing the thorough and effective cleaning effect of the end of the exhaust hole 9. The air pressure inside the exhaust hole 9 decreases, and the moving block 21 drives the crossbar 24 to continuously move downward through the connecting block 23, and the above process is repeated to realize the continuous upward and downward insertion movement of the crossbar 24 inside the exhaust hole 9, thereby continuously realizing the thorough and effective insertion cleaning of the impurities blocked at the top of the exhaust hole 9.

[0058] The top of the chute 18 is provided with a matching hole 28 which is not communicated with the chute 18. The inside of the matching hole 28 is slidably connected with a piston block 29. The bottom of the piston block 29 is fixedly connected with the top of the vertical rod 27. When the vertical rod 27 moves up and down, it synchronously drives the piston block 29 to move up and down inside the matching hole 28. One side of the elastic sleeve 14 is communicated with a horizontal hose 30. The other end of the horizontal hose 30 penetrates through the wrapped air bag 11 and the brick core 4 and is communicated with the bottom of the matching hole 28. When the elastic sleeve 14 is extruded, the internal gas enters the bottom of the matching hole 28 through the horizontal hose 30. The air pressure at the bottom of the matching hole 28 continuously increases and drives the piston block 29 to move upward along the matching hole 28.

[0059] The circumferential surface of the piston block 29 is sealingly and slidably connected with the inner wall of the matching hole 28. The gas inside the matching hole 28 can only act on the bottom of the piston block 29. The top of the piston block 29 is provided with a top spring 32. The top of the top spring 32 is fixedly connected with the inner top of the matching hole 28. The provision of the top spring 32 further improves the elastic reset performance of the piston block 29.

[0060] One end of the horizontal hose 30 is located at the top of one side of the elastic sleeve 14. The other end of the horizontal hose 30 is located at the bottom of one side of the matching hole 28. This arrangement ensures that no matter how the elastic gasket 31 or the piston block 29 moves, it will not hinder the flow of gas inside the horizontal hose 30. That is, the gas inside the elastic sleeve 14 and the matching hole 28 is communicated through the horizontal hose 30, thereby effectively improving the stability and flow of the gas flow.

[0061] In use, initially, the sliding block 10 is driven to the end of the exhaust hole 9 and blocks the exhaust hole 9 under the elastic force of the pressing spring 13, so that impurities and the like from outside cannot enter the horizontal hole 8 along the exhaust hole 9, and the plurality of groups of air permeable holes 25 in the horizontal rod 24 can also filter and block impurities and the like from outside, further improving the cleanliness and stability of the inside of the brick core 4.

[0062] Then, the brick seat 1 is installed to the inner bottom of the ladle according to the first embodiment, and the brick core 4 is inserted into the inside of the brick seat 1 along the middle hole 3, and when the brick core 4 reaches the maximum height, the elastic insertion rod 12 is matched with the insertion slot 17, the external air inlet pipe introduces stable gas into the inside of the fixed pipe 5, the stable gas enters the connecting hole 7 along the fixed pipe 5, and reaches the horizontal hole 8 along the connecting hole 7, and the sliding block 10 moves to the appropriate position on both sides under the action of the stable gas in the horizontal hole 8, but the sliding block 10 still achieves partial blocking of the exhaust hole 9, and the sliding block 10 moves synchronously to drive the elastic insertion rod 12 to move, the other end of the elastic insertion rod 12 passes through the brick core 4 and is inserted into the inside of the insertion slot 17, so that the insertion and fixing effect of the brick core 4 and the brick seat 1 is further improved by the insertion and connection of the elastic insertion rod 12 and the insertion slot 17, the stability is stronger, and the assembly is better, and when the assembly is completed, the stable gas in the horizontal hole 8 is discharged along the exhaust hole 9, so as to achieve the effect of removing impurities and cleaning the molten steel in the ladle.

[0063] When the molten steel in the ladle continuously shakes, or the impurities and the like in the ladle continuously shake with the shaking of the molten steel, the force exerted by the molten steel on one side of the top of the brick core 4 continuously changes, and the brick core 4 is easily shaken in the middle hole 3 of the brick seat 1 and eventually separated under the action of the changing impact force, so that when the force exerted by the molten steel on one side of the top of the brick core 4 increases, the top of the side of the brick core 4 will tilt downward under the action of the force, the elastic insertion rod 12 is driven by the brick core 4 to move downward in the insertion slot 17, the elastic sleeve 14 and the elastic gasket 31 at the bottom are driven by the elastic insertion rod 12 to increase the extrusion force with the inside of the insertion slot 17, the elastic sleeve 14 is subjected to an increased extrusion force, and the elastic insertion rod 12 is subjected to a reverse force under the elastic force of the elastic sleeve 14 and the elastic force of the plurality of groups of return springs 15, so as to further improve the insertion and support effect of the elastic insertion rod 12 in the insertion slot 17, thereby ensuring the stability of the brick core 4 in the brick seat 1.

[0064] Simultaneously, when the elastic rod 12 compresses the elastic sleeve 14 inside the slot 17, the gas inside the elastic sleeve 14 reaches the matching hole 28 along the transverse hose 30. The air pressure at the bottom of the matching hole 28 increases, causing the piston block 29 to compress the top spring 32 and move upward. When the piston block 29 moves upward, it drives the moving block 21 to move upward through the vertical rod 27. The moving block 21 stretches the bottom bellows 19 and expands upward. The volume of the bellows 19 increases and the air pressure decreases. Under the action of negative pressure, the gas inside the airbag 11 is drawn in and enters the bellows 19 along the connecting hose 16. The volume of the airbag 11 decreases and drives the slider 10 to move horizontally. As hole 8 moves in the opposite direction, slider 10 moves, causing elastic rod 12 to move further along slot 17. The insertion depth of elastic rod 12 into slot 17 increases further, thus increasing the length of elastic rod 12, elastic sleeve 14 at the bottom, and return spring 15 inside slot 17. The elastic support force applied to elastic rod 12 by elastic sleeve 14 and return spring 15 further increases, and the elastic support force of elastic rod 12 on brick core 4 further increases. This elastic support force improves the elastic support stability of brick core 4 inside the middle hole 3 of brick base 1, resulting in stronger adaptability and higher stability.

[0065] At the same time, when the slider 10 moves along the transverse hole 8, the blocking area of ​​the slider 10 on the exhaust hole 9 decreases, and the amount of stable gas inside the transverse hole 8 discharged into the ladle through the exhaust hole 9 increases. The efficiency of the stable gas in removing impurities from the molten steel at the top of the brick core 4 is further increased, thereby ensuring that the molten steel at the top of the brick core 4 can be thoroughly and effectively removed. It has stronger adaptability and higher stability, and further improves the adaptability and cleaning effect of the molten steel at the top of the brick core 4 while ensuring the stability of the brick core 4.

[0066] Furthermore, when the moving block 21 slides upward inside the slide groove 18, the moving block 21 drives the crossbar 24 to move upward inside the exhaust hole 9 through the connecting block 23. The crossbar 24 drives multiple sets of vent holes 25 to move upward inside the exhaust hole 9. With the help of this up-and-down vibration effect, the vibration cleaning effect on the vent holes 25 inside the crossbar 24 is further improved, resulting in stronger unclogging ability and higher stability.

[0067] Once the impurities on the top side of the brick core 4 are cleaned, the force exerted by the molten steel on the top side of the brick core 4 decreases to its initial value. Under the elastic action of multiple sets of return springs 15, the elastic rod 12 moves upward inside the slot 17 to restore its initial value, and the elastic sleeve 14 correspondingly restores its initial value. The piston block 29 restores its initial value inside the matching hole 28. The vertical rod 27 drives the moving block 21 to restore its initial value inside the slide groove 18. The bellows 19 restores its initial value, and the encasing airbag 11 drives the slider 10 to restore its initial value. The moving block 21 drives the horizontal rod 24 to restore its initial value through the connecting block 23. The horizontal rod 24 vibrates up and down inside the exhaust hole 9, thereby improving the vibration and clearing effect on the impurities inside the vent hole 25. Thus, the various structures cooperate and work together to not only improve the elastic support effect of the brick core 4, but also adapt to increase the stable gas volume of the molten steel on the top of the brick core 4, thereby ensuring that the molten steel on the top side of the brick core 4 can be thoroughly and effectively cleaned.

[0068] When the end of the exhaust port 9 becomes blocked after prolonged use, the stable gas at the end of the exhaust port 9 on this side cannot be discharged. As a result, the air pressure inside the exhaust port 9 continuously increases, and the air pressure inside the transverse hole 8 on the same side increases synchronously. The force exerted by the air pressure inside the transverse hole 8 on the end of the slider 10 continuously increases. Under the action of this air pressure, the slider 10 continuously squeezes and wraps the airbag 11, moving it to the maximum distance towards the side wall of the transverse hole 8. When the airbag 11 is squeezed, the gas inside reaches the bellows 19 along the connecting hose 16. The air pressure inside the bellows 19 increases, and its volume continuously increases. The bellows 19 then drives the top... The moving block 21 continuously moves upward along the chute 18. When the moving block 21 moves upward, it drives the crossbar 24 to move upward through the connecting block 23. The crossbar 24 moves upward and drives the multiple sets of breaking needles 26 at the top to move upward. When the breaking needles 26 move upward to the maximum distance and extend out of the vent hole 9, the piercing and breaking effect of the breaking needles 26 on the impurities at the end of the vent hole 9 is used to further improve the plugging and clearing effect on the impurities blocking the end of the vent hole 9. This effectively avoids the reduction in the impurity removal efficiency of the molten steel inside the ladle after the end of the vent hole 9 is blocked. It has stronger adaptability and higher clearing efficiency.

[0069] When the moving block 21 moves upward, the piston block 29 is driven by the vertical rod 27 to move upward along the matching hole 28, the space at the bottom of the matching hole 28 increases, the air pressure decreases, and the gas in the elastic sleeve 14 is extracted into the bottom of the matching hole 28 along the communication hose 16 under the action of negative pressure, the air pressure in the elastic sleeve 14 decreases, the supporting force of the elastic sleeve 14 on the elastic plug rod 12 decreases, and the elastic plug rod 12 has a downward movement tendency in the insertion slot 17, the corresponding elastic plug rod 12 drives the brick core 4 to move downward in the middle hole 3 of the brick seat 1, the distance between the top of the brick core 4 and the bottom of the ladle changes, thereby effectively improving the vibration unblocking effect of the impurities accumulated on the top of the brick core 4, and avoiding the impurities from being accumulated on the end of the exhaust hole 9 for a long time and blocking the exhaust hole 9.

[0070] When the broken needle 26 passes through the exhaust hole 9, the stable gas in the exhaust hole 9 is discharged into the ladle along the end, or part of the stable gas is discharged along the through hole in the broken needle 26, the air pressure in the horizontal hole 8 and the exhaust hole 9 decreases, the air pressure acting on the sliding block 10 decreases, the sliding block 10 is reversely moved under the elastic force of the compression spring 13 to restore the original position, the corresponding wrapped air bag 11 increases in volume, the moving block 21 moves downward along the sliding groove 18 to restore the original position, the moving block 21 drives the horizontal rod 24 to move downward to restore the original position through the connecting block 23, the moving block 21 drives the piston block 29 to move downward along the matching hole 28 to restore the original position through the vertical rod 27 at the top, the gas in the matching hole 28 reversely enters the elastic sleeve 14 along the horizontal hose 30, the air pressure in the elastic sleeve 14 increases and drives the elastic plug rod 12 at the top to move upward to restore the original position, the corresponding elastic plug rod 12 drives the brick core 4 to move upward along the middle hole 3 of the brick seat 1 to restore the original position, and the brick core 4 is further improved in adaptability to the clogging impurities at the end of the exhaust hole 9 under the action of the upward and downward vibration and the puncture of the broken needle 26, the stability is stronger, the unblocking efficiency is higher, and the actual production and processing requirements are met.

[0071] When the impurities in the steel liquid in the ladle are removed, the steel liquid in the ladle is poured out, and the stable gas is stopped from being introduced into the fixed pipe 5, the air pressure in the horizontal hole 8 decreases to zero, the sliding block 10 is reversely moved along the horizontal hole 8 to restore the original position under the elastic force of the compression spring 13 and blocks the end of the exhaust hole 9, the sliding block 10 reversely moves the elastic plug rod 12 and separates from the insertion slot 17, at this time, the brick core 4 is directly slid out along the middle hole 3 of the brick seat 1, and the replacement and maintenance of the brick core 4 is completed, the installation efficiency is higher, and the installation adaptability is stronger.

[0072] The device effectively improves the installation efficiency of the brick seat 1 and the brick core 4, has stronger matching, better clamping and fixing effect, higher installation precision, simple operation, is convenient for subsequent replacement and maintenance, and has better installation adaptability and installation stability effect; meanwhile, when the force on the top side of the brick core 4 increases, the elastic support effect on the side can be improved, the stability and supportability of the brick core 4 in the middle hole 3 of the brick seat 1 are ensured, and the exhaust capacity of the exhaust hole 9 on the side can also be correspondingly improved, so that the impurity removal efficiency of the molten steel on the top of the brick core 4 is improved, the adaptability is stronger, and the impurity removal efficiency is higher; meanwhile, when the end of the exhaust hole 9 is blocked, the broken needle 26 breaks the blockage of impurities at the end of the exhaust hole 9 by means of the change of the air pressure in the transverse hole 8, and the elastic sleeve 14 drives the brick core 4 to vibrate up and down in the middle hole 3 of the brick seat 1, so that the vibration unblocking effect of the blocked impurities at the end of the exhaust hole 9 is further improved, and the device has higher stability, stronger supportability, and better impurity removal efficiency and impurity removal effect. Example three

[0073] A material for a steel ladle bottom blowing non-burning permeable brick core is expressed by weight percentage, and the material of the brick core 4 mainly consists of tabular corundum 70-75%, alumina powder 5-10%, chromium oxide green powder 1-5%, and 325 mesh magnesium aluminum spinel 10-15%; in addition, a binder accounting for 3-5% of the total weight of the above-mentioned raw materials is added.

[0074] The weighed raw materials are added to a strong sand mixer for stirring with water to obtain a mixture; the mixture is placed in an assembled mold for vibration forming into the brick core 4; the brick core 4 is placed in a dryer for drying, and the dried product is placed in a kiln at 500-600 degrees for burning, and after the burning is completed, natural cooling is performed, and the product is obtained after cooling.

[0075] The permeable brick core 4 prepared by the technical scheme of the present application reduces energy waste and environmental pollution caused by high-temperature burning, and also has high strength, anti-erosion, anti-permeation, and high thermal shock resistance.

[0076] At present, the structure of the permeable brick mostly used is a slit type permeable brick, and the slit type permeable brick has many advantages such as long service life, high blowing rate, adjustable air flow, good stirring effect, and the like. Due to these advantages, the slit type permeable brick has become the most popular permeable brick on the market.

[0077] A preparation method of a steel ladle bottom blowing non-burning permeable brick core, the preparation method is used for preparing a steel ladle bottom blowing non-burning permeable brick core, and comprises the following steps:

[0078] 1. First, the various raw materials are weighed according to the proportioning ratio of the material of the brick core 4, and the weighed raw materials are added to a strong sand mixer for stirring with water for 5-10 minutes to obtain a mixture.

[0079] 2. Put the mixture obtained in step 1 into the assembled mould and perform vibration molding.

[0080] 3. Put the molded brick core 4 obtained in step 2 into a dryer and dry it at a temperature of 50-60°C for 16-24 hours; the volume density of the dried brick core is controlled to be 3.1-3.3 g / cm3.

[0081] 4. Put the product dried in step 3 into a kiln and perform firing, when the firing temperature reaches 500-600°C, keep it for 8-10 hours; after the firing is completed, perform natural cooling, and the brick core 4 is obtained after cooling.

[0082] By further limiting the preparation method, the preparation efficiency is improved and the preparation quality is ensured.

[0083] It should be noted that, in this text, relational terms such as first and second are used only to distinguish one entity or operation from another, and do not necessarily require or imply any actual such relationship or order between or among the entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment.

[0084] Although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A bottom-blown, non-fired, breathable brick core made of steel ladle, comprising a brick base, characterized in that, A central hole is provided at the central axis of the brick base, and a brick core is provided inside the central hole; The inner wall of the central hole is evenly provided with multiple sets of slots, and the interior of the brick core is evenly provided with multiple sets of horizontal holes. The top of the horizontal hole is connected to an exhaust hole, and a slider is slidably connected inside the horizontal hole. One end of the slider is provided with an elastic rod, and the bottom of the elastic rod is provided with an elastic sleeve. One end of the slider and the outer surface of the elastic rod is provided with a wrapping airbag, and the other end of the wrapping airbag is fixedly connected to the side wall of the horizontal hole. The brick core is evenly provided with multiple sets of sliding grooves. The bottom of the sliding groove is provided with a corrugated pipe. The top of the corrugated pipe is provided with a movable block. The top of the movable block is provided with a vertical rod. The top of the airbag is connected to a connecting hose. The other end of the connecting hose passes through the brick core and is connected to the bottom of the corrugated pipe. The exhaust port is provided with a crossbar inside, one end of which is provided with a connecting block, and the other end of which is fixedly connected to the side wall of the movable block. The top of the chute is provided with a matching hole, and a piston block is slidably connected inside the matching hole. The bottom of the piston block is fixedly connected to the top of the vertical rod. One side of the elastic sleeve is connected to a transverse hose, and the other end of the transverse hose passes through the airbag and brick core and is connected to the bottom of the matching hole. The width of the slider matches the width of the vent hole. The side wall of the slider is provided with a compression spring. The other end of the compression spring is fixedly connected to the side wall of the transverse hole. The compression spring is located between the elastic rod and the airbag. The other end of the elastic rod passes through the brick core and matches the slot. The elastic rod is elastic. The chute has a side hole on one side, and the other end of the side hole is connected to the exhaust hole. Two sets of elastic fitting pieces are symmetrically provided on the side wall of the side hole. The opposite ends of the elastic fitting pieces are fitted together. The connecting block matches the opposite ends of the two sets of elastic fitting pieces. The width of the crossbar is smaller than the width of the vent hole. Multiple sets of vent holes are evenly arranged inside the crossbar. Multiple sets of breaking needles are evenly arranged at the top of the crossbar. The breaking needles have flow holes inside, which are connected to the vent holes. The ends of the breaking needles are matched with the vent holes.

2. The bottom-blown, non-fired, breathable brick core according to claim 1, characterized in that, The top of the brick base is evenly provided with multiple sets of lifting rings, and a connecting rod is provided between adjacent lifting rings. The structure of the middle hole and the brick core are matched. Both the middle hole and the brick core are conical structures, and the diameter of the middle hole and the brick core gradually increases from top to bottom.

3. The bottom-blown, non-fired, breathable brick core according to claim 1, characterized in that, The other end of the vent hole passes through the brick core and is connected to the outside. The bottom of the brick core is provided with a fixing tube, and the bottom outer surface of the fixing tube is provided with external threads. The bottom of the horizontal hole is connected to a connecting hole, and the bottom of the connecting hole is connected to the top of the fixing tube.

4. The bottom-blown, non-fired, breathable brick core according to claim 1, characterized in that, The bottom of the elastic sleeve is provided with an elastic gasket, the bottom of which matches the inner bottom of the transverse hole. The bottom of the elastic insert is provided with multiple sets of return springs, and the bottom of the return springs is fixedly connected to the top of the elastic gasket.

5. The bottom-blown, non-fired, breathable brick core according to claim 1, characterized in that, The movable block is slidably connected to the inner wall of the chute, and a connecting spring is provided at the bottom of the movable block. The bottom of the connecting spring is fixedly connected to the inner bottom of the chute, and the connecting spring is located inside the bellows.

6. The bottom-blown, non-fired, breathable brick core according to claim 1, characterized in that, The peripheral side of the piston block is slidably and sealed to the inner wall of the matching hole. A top spring is provided on the top of the piston block. The top of the top spring is fixedly connected to the inner top of the matching hole. One end of the transverse hose is located at the top of one side of the elastic sleeve, and the other end of the transverse hose is located at the bottom of one side of the matching hole.

7. A method for preparing a bottom-blown, non-fired, permeable brick core, wherein the method is used to prepare the bottom-blown, non-fired, permeable brick core as described in claim 1, characterized in that, Includes the following steps:

1. First, weigh all the raw materials according to the proportion of materials for brick core. Add the weighed raw materials to a high-strength sand mixer, add water and stir for 5-10 minutes to obtain a mixture.

2. Place the mixture obtained in step 1 into the assembled mold and vibrate it to form the final product; 3. Place the brick core formed in step 2 into a dryer for drying at a temperature of 50-60℃ for 16-24 hours; the bulk density of the dried brick core should be controlled to be 3.1-3.3 g / cm³.

4. Place the dried product from step 3 into a kiln for firing. When the firing temperature reaches 500-600℃, keep it at that temperature for 8-10 hours. After firing, allow it to cool naturally to obtain the brick core.

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