CN112979281A - Novel high-temperature-resistant magnesia carbon brick and manufacturing process thereof - Google Patents
Novel high-temperature-resistant magnesia carbon brick and manufacturing process thereof Download PDFInfo
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- CN112979281A CN112979281A CN202110412958.1A CN202110412958A CN112979281A CN 112979281 A CN112979281 A CN 112979281A CN 202110412958 A CN202110412958 A CN 202110412958A CN 112979281 A CN112979281 A CN 112979281A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/03—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on magnesium oxide, calcium oxide or oxide mixtures derived from dolomite
- C04B35/04—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on magnesium oxide, calcium oxide or oxide mixtures derived from dolomite based on magnesium oxide
- C04B35/043—Refractories from grain sized mixtures
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3427—Silicates other than clay, e.g. water glass
- C04B2235/3463—Alumino-silicates other than clay, e.g. mullite
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/42—Non metallic elements added as constituents or additives, e.g. sulfur, phosphor, selenium or tellurium
- C04B2235/422—Carbon
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
- C04B2235/9607—Thermal properties, e.g. thermal expansion coefficient
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Abstract
The invention discloses a novel high-temperature-resistant magnesia carbon brick, which is prepared by processing the following raw materials in parts by weight: 8-15 parts of crystalline flake graphite powder, 65-80 parts of fused magnesia granules, 2-4 parts of an additive, 6-10 parts of mullite powder, 1-3 parts of a binder and 5-12 parts of water; according to the invention, magnesia carbon brick raw materials are put into a pressing die box, a magnesia carbon brick blank is obtained through machine pressing, a refractory coating is coated on the fire-facing surface of the magnesia carbon brick blank through a coating roller, specifically, the pressing die box is aligned to a vertical material discharging box after rotating for 90 degrees, a driving cylinder simultaneously pushes out a die box bottom plate and a coating roller, the magnesium carbon brick blank is pushed into the vertical material discharging box by the die box bottom plate, and the coating roller just coats the refractory coating on the fire-facing surface of the magnesia carbon brick blank in the process of backward moving and resetting of the pressing die box; the whole process from press forming to final drying and roasting of the magnesia carbon brick blank avoids the contact between manpower or machines and the surface of the magnesia carbon brick blank, and improves the quality of the magnesia carbon brick blank.
Description
Technical Field
The invention belongs to the technical field of refractory material production, and particularly relates to a novel high-temperature-resistant magnesia carbon brick and a manufacturing process thereof.
Background
The magnesia carbon brick is commonly called a refractory brick, is a refractory material fired by refractory clay or other refractory raw materials, is mainly used for building and smelting furnaces, can resist the high temperature of 1580-1770 ℃, is a refractory material with a certain shape and size, can be used as a high-temperature building material and a structural material of building kilns and various thermal equipment, can bear various physical and chemical changes and mechanical actions at high temperature, contains graphite and binding agent phenolic resin which are easy to oxidize at high temperature, inevitably generates carbon oxidation after being baked at 800-1100 ℃, generates an obvious decarburized layer, leads to loose material tissue structure and reduced strength, and magnesium oxide particles are gradually eroded and fallen to be damaged under the actions of slag erosion, mechanical scouring and the like.
Under the high-temperature working environment, the fire-facing surface of the magnesia carbon brick is most affected by the fire-facing surface, and the most convenient measure for improving the situation is to coat a fire-resistant layer on the fire-facing surface of the magnesia carbon brick at present, but the existing manufacturing process is to coat materials after the magnesia carbon brick is fired, the bonding property between the fire-resistant layer and the magnesia carbon brick matrix is not very good, and in addition, the existing manufacturing equipment is various, the working procedures are complex, and the production efficiency is affected.
Disclosure of Invention
The invention aims to provide a novel high-temperature-resistant magnesia carbon brick and a manufacturing process thereof, the magnesia carbon brick can be vertically placed on a conveyor belt after being pressed and formed, the magnesia carbon brick can be vertically coated with a fire-resistant layer, and the magnesia carbon brick and the fire-resistant layer enter a firing room together for firing, so that the bonding property between the fire-resistant layer and a magnesia carbon brick substrate can be greatly improved.
The purpose of the invention can be realized by the following technical scheme:
a high temperature resistant novel magnesia carbon brick which is characterized in that: the material is prepared by processing the following raw materials in parts by weight: 8-15 parts of crystalline flake graphite powder, 65-80 parts of fused magnesia granules, 2-4 parts of an additive, 6-10 parts of mullite powder, 1-3 parts of a binder and 5-12 parts of water;
the granularity of the flake graphite powder is less than or equal to 0.088mm, and the content of magnesium oxide in the fused magnesia powder is more than 98 percent;
the powder with the particle diameter of the fused magnesia particles smaller than 1mm and the particles with the particle diameter of 1-3mm and the particle diameter of 3-5mm are mixed according to the weight ratio of 1: 0.5-1.5: 0.7-2, and mixing uniformly;
the content of water glass in the adhesive is 3% -8%, the content of PVA is 4% -7% and the content of PVP is 0.8% -1%;
the production process of the novel high-temperature-resistant magnesia carbon brick comprises the following steps:
uniformly mixing fused magnesia powder, fused magnesia granules and an additive according to a weight ratio by using a mixing device to obtain a magnesia carbon brick raw material, and pouring the magnesia carbon brick raw material into a discharge barrel for later use;
step two, uniformly mixing mullite powder, a binder and water according to a weight ratio by using another mixing device to obtain a refractory coating, and uniformly smearing the refractory coating on a coating roller in a pressing die box for later use;
putting the magnesia carbon brick raw material into a pressing mold box, performing machine pressing to obtain a magnesia carbon brick blank, and coating a refractory coating on the fire-facing surface of the magnesia carbon brick blank by a coating roller;
the method for quickly coating the refractory coating on the surface of the magnesia carbon brick comprises the following steps:
the telescopic arm extends into the T-shaped sliding chute under the action of the sliding cylinder, the pressing die box moves backwards to be under a discharging channel arranged at the bottom of the discharging barrel, a vertical seat arranged at the front end of the top surface of the telescopic arm drives a bending discharging plate in the discharging channel to be opened, magnesia carbon brick raw materials in the discharging channel fall into the discharging chute in the pressing die box, and a rotary motor in the telescopic arm drives the pressing die box to rotate in a small range from left to right so that the magnesia carbon brick raw materials in the discharging chute tend to be average;
under the action of the sliding cylinder, the pressing die box moves forwards to the position under the pressing block, under the action of the pressing cylinder, the pressing block presses and forms the magnesia carbon brick raw materials in the feeding groove to obtain a brick blank, in the pressing process of the pressing block, a horizontal feeding plate in the feeding channel is in an open state, the magnesia carbon brick raw materials in the feeding barrel automatically fall into the feeding channel, and after the pressing block is reset, the horizontal feeding plate is closed;
under the effect of the cylinder that slides, the suppression diaphragm capsule continues to move forward and move to the conveyer belt in the place ahead on, under the rotating electrical machines effect, the rotatory 90 degrees of suppression diaphragm capsule, the vertical blowing box on the conveyer belt is aimed at to the magnesium carbon brick embryo adjustment in the blowing groove this moment, two drive actuating cylinders that suppression diaphragm capsule bottom was equipped with are simultaneously released diaphragm capsule bottom plate and applicator roll, the diaphragm capsule bottom plate then pushes the magnesium carbon brick embryo in the spacing groove in the vertical blowing box, and the applicator roll becomes vertical state and just in time scribbles refractory coating on the face of a fire of magnesium carbon brick embryo at the in-process that the suppression diaphragm capsule moved backward and resets.
And step four, baking the magnesia carbon brick blank coated with the refractory material for 4 hours in an environment of 100 ℃, then heating the temperature to 170-180 ℃ for baking for 2 hours, then heating the temperature to 200-220 ℃ for baking for 2 hours, and finally preserving the heat for 1 hour in an environment of 210-220 ℃, wherein the refractory material and the magnesia carbon brick are firmly combined to obtain the finished high-temperature resistant magnesia carbon brick.
As a further scheme of the invention, the additive is one or a mixture of more than one of silicon powder, aluminum powder, asphalt powder, silicon carbide, boron carbide and magnesium aluminum alloy powder.
As a further scheme of the invention, the binding agent is one or the combination of two of phenolic resin, asphalt and pulp waste liquid.
As a further scheme of the invention, the pressing die box is movably arranged in a working groove arranged at the front end of the top surface of the base, a pair of hydraulic guide seats are arranged at the front ends of the top surface of the base and positioned at the left side and the right side of the working groove, a hydraulic cylinder is arranged on the outer side wall of each hydraulic guide seat, vertical guide columns arranged at the two sides of the bottom surface of the lifting plate seat are inserted into the hydraulic guide seats, a piston rod of the hydraulic cylinder is connected with a lifting connecting plate arranged on the side wall of the lifting plate seat, a central connecting seat is arranged at the center of the bottom surface of the lifting plate seat, an extending connecting block is arranged at the bottom surface of the central connecting seat;
a T-shaped sliding groove is formed in the rear end face of the working groove, the telescopic arm is inserted into the transverse part of the T-shaped sliding groove, a pressing mold box is rotatably arranged on the front end face of the telescopic arm, a rotating motor is arranged in a motor groove formed in the front end of the top face of the telescopic arm, the output shaft of the rotating motor is connected with a central rotating shaft of the pressing mold box, a supporting guide rail is arranged on the bottom face of the working groove, and a mold box guide block arranged on the bottom face of a mold box bottom plate is slidably arranged on the supporting guide rail;
the top surface of base just is located the left and right sides rear end of working groove and is equipped with a pair of support frame, and the blowing bucket is fixed between the roof of two support frames, the unloading passageway is located between the hang plate that the bottom both sides of blowing bucket were equipped with, the horizontal part of flitch is inserted and is established in the unloading passageway under bending, is connected with the extension spring that resets between the vertical portion of flitch under bending and the back lateral wall of unloading passageway.
As a further scheme of the invention, a guide through groove communicated with the T-shaped sliding groove is arranged on the top surface of the base and right behind the working groove, cylinder mounting plates are arranged on the front side and the rear side of the guide through groove, a sliding cylinder is mounted between the two cylinder mounting plates, and a connecting bulge arranged on the top surface of the telescopic arm is connected with the sliding cylinder; the telescopic arm is provided with a plurality of movable guide blocks matched with the support guide rails.
As a further scheme of the invention, the horizontal feeding plate is inserted above the front side wall of the blanking channel, a longitudinal spur rack is arranged on the bottom surface of the horizontal feeding plate positioned outside the blanking channel, a pair of mounting arms are arranged on the front side wall of the blanking channel and below the horizontal feeding plate, a central gear meshed with the longitudinal spur rack is rotatably arranged between the two mounting arms, the left end of a rotating shaft of the central gear penetrates through the mounting arm on the left side and is connected with a transmission gear, a right-angle transmission frame with a rear side plate as a vertical spur rack is arranged on the rear side wall of the central connecting seat, and the transmission gear is meshed with the vertical spur rack on the right-angle transmission frame.
As a further scheme of the invention, the front end of the top surface of the pressing die box is provided with a containing groove, a coating bottom plate is arranged in the containing groove in a sliding manner, the left side and the right side of the top surface of the coating bottom plate are provided with a pair of roll shaft mounting plates, a coating roller is rotatably mounted between the two roll shaft mounting plates, and a containing tension spring is connected between the center of the bottom surface of the containing groove and the bottom surface of the coating bottom plate; the left and right sides of the front end of the bottom surface of the pressing die box are provided with a pair of transmission through grooves communicated with the containing grooves, two driving cylinders are installed in a pair of grooves formed in the left and right sides of the bottom surface of the pressing die box, piston rods of the driving cylinders are connected with discharge connecting frames formed in the bottom surface of a die box bottom plate, an L-shaped transmission frame is arranged on the front side wall of each discharge connecting frame, and the vertical portion of each L-shaped transmission frame faces the transmission through groove in the corresponding side.
As a further scheme of the invention, a hollow long gear concentric with a self rotation center is fixed on the front side wall of the pressing die box, the vertical discharging box is slidably arranged on two transverse guide rails arranged on the top surface of the conveying belt, a transverse straight rack meshed with the hollow long gear is arranged on the front side wall of the vertical discharging box, a positioning plate is arranged on the left side of the vertical discharging box, a positioning column is arranged on the right side wall of the positioning plate, a return spring is sleeved on the positioning column, one end of the return spring is connected to the positioning plate, and the other end of the return spring is connected to the vertical discharging box.
As a further scheme of the invention, the top surface of the vertical seat is provided with a high-pressure air nozzle.
The invention has the beneficial effects that:
1. through the arrangement of the movable and rotatable pressing die box, after the pressing die box moves backwards, magnesia carbon brick raw materials in the blanking channel can quickly and accurately enter the pressing die box, automatic feeding is realized, and after the pressing die box rotates left and right in a small range, the magnesia carbon brick raw materials in the box can automatically rock to a uniform distribution state, so that the magnesia carbon brick blank can be more uniformly pressed in the subsequent processing process, and the pressing quality of the brick blank is improved;
2. after the pressing is finished, when the pressing die box moves forwards to the conveying belt, the position of the vertical discharging box can be adjusted through rotation once again, the feeding is convenient, the step of manually adjusting the magnesia carbon brick blank to be in a vertical state in the traditional processing procedure can be omitted, the cost is saved, the efficiency is improved, the contact between manpower or machines and the surface of the magnesia carbon brick blank is avoided in the whole process from the pressing forming to the final drying roasting, and the quality of the magnesia carbon brick blank is further improved;
3. the bottom of the pressing die box is provided with the driving cylinder, so that the automatic discharging of the magnesia carbon brick blank and the automatic storage of the coating roller are realized, the coating roller is matched with the automatic reset of the pressing die box to realize the automatic coating of the surface of the magnesia carbon brick blank, and the whole process from discharging to coating of a refractory coating of the magnesia carbon brick blank is free of any intermission procedure, so that the efficiency is greatly improved, the coated magnesia carbon brick blank can enter a drying room immediately, and the bonding effect of the refractory coating and the magnesia carbon brick blank is improved;
4. the horizontal feeding plate and the bending discharging plate are arranged in the discharging channel, so that the quantity of the magnesia carbon brick raw materials entering the pressing die box at every time is consistent, the shape and size of each magnesia carbon brick blank are uniform, the automatic feeding of the magnesia carbon brick raw materials is realized by the lifting action of the central connecting seat, an additional driving device is omitted, and the production cost is saved.
Drawings
The invention is described in further detail below with reference to the figures and specific embodiments.
FIG. 1 is a schematic structural diagram of an apparatus for producing magnesia carbon bricks;
FIG. 2 is a three-dimensional perspective view of another perspective of an apparatus for producing magnesia carbon bricks;
FIG. 3 is a rear three-dimensional perspective view of an apparatus for producing magnesia carbon bricks;
FIG. 4 is a right side view of the apparatus for producing magnesia carbon bricks;
FIG. 5 is an internal sectional view of an apparatus for manufacturing magnesia carbon bricks;
FIG. 6 is a schematic view of a press mold box;
FIG. 7 is a bottom three-dimensional perspective view of a press die box;
FIG. 8 is a top view of a press die box.
Reference numerals: 1. a conveyor belt; 2. a base; 4. pressing the mold box; 5. a telescopic arm; 11. vertically placing a material box; 12. a transverse spur rack; 13. a transverse guide rail; 14. positioning a plate; 15. a return spring; 21. supporting the guide rail; 22. a hydraulic guide seat; 23. a hydraulic cylinder; 24. a lifting plate seat; 25. a central connecting seat; 26. pressing blocks; 27. a right-angle transmission frame; 31. a support frame; 32. a discharge barrel; 33. a blanking channel; 34. bending the blanking plate; 35. a horizontal feed plate; 36. mounting an arm; 37. a sun gear; 38. a transmission gear; 41. a hollow long gear; 42. a mold box base plate; 43. a paint roller; 44. a driving cylinder; 45. a discharging connecting frame; 46. a die box guide block; 47. a paint base plate; 48. a roll shaft mounting plate; 49. a central rotating shaft; 51. a motor slot; 52. a rotating electric machine; 53. a vertical seat; 54. a high pressure showerhead; 55. a slide cylinder; 56. a connecting projection; 57. moving the guide block; 111. a limiting groove; 201. a working groove; 202. a guide through groove; 203. a T-shaped chute; 241. a vertical guide post; 242. lifting the connecting plate; 251. an extension connecting block; 341. a return tension spring; 351. a longitudinal spur rack; 401. a discharging groove; 402. a receiving groove; 403. a transmission through groove; 451. an L-shaped transmission frame; 551. the cylinder mounting panel.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The novel high-temperature-resistant magnesia carbon brick is prepared by processing the following raw materials in parts by weight: 8-15 parts of crystalline flake graphite powder, 65-80 parts of fused magnesia granules, 2-4 parts of an additive, 6-10 parts of mullite powder, 1-3 parts of a binder and 5-12 parts of water;
the granularity of the flake graphite powder is less than or equal to 0.088mm, and the content of magnesium oxide in the fused magnesia powder is more than 98 percent;
the powder with the particle diameter of the fused magnesia particles smaller than 1mm and the particles with the particle diameter of 1-3mm and the particle diameter of 3-5mm are mixed according to the weight ratio of 1: 0.5-1.5: 0.7-2, and mixing uniformly;
the content of water glass in the adhesive is 3% -8%, the content of PVA is 4% -7% and the content of PVP is 0.8% -1%;
the production process of the novel high-temperature-resistant magnesia carbon brick comprises the following steps:
step one, uniformly mixing fused magnesia powder, fused magnesia granules and an additive according to a weight ratio by using a mixing device to obtain a magnesia carbon brick raw material, and pouring the magnesia carbon brick raw material into a discharge barrel 32 for later use;
step two, uniformly mixing mullite powder, a binder and water according to a weight ratio by using another mixing device to obtain a refractory coating, and uniformly smearing the refractory coating on a coating roller 43 in a pressing die box 4 for later use;
thirdly, putting the magnesia carbon brick raw material into a pressing die box 4, performing machine pressing to obtain a magnesia carbon brick blank, and smearing the refractory coating on the fire facing surface of the magnesia carbon brick blank through a coating roller 43;
and step four, drying the magnesia carbon brick blank coated with the refractory material at the temperature of 240-300 ℃ and roasting for 10-14h in a heat preservation way, wherein the refractory material is firmly combined with the magnesia carbon brick to obtain the finished high-temperature-resistant magnesia carbon brick.
As shown in fig. 1 to 8, a conveyor belt 1 is arranged right in front of a base 2, a working groove 201 is arranged at the front end of the top surface of the base 2, a pressing mold box 4 is movably arranged in the working groove 201, a pair of hydraulic guide seats 22 are arranged at the front ends of the top surface of the base 2 and positioned at the left and right sides of the working groove 201, a hydraulic cylinder 23 is arranged on the outer side wall of each hydraulic guide seat 22, vertical guide posts 241 arranged at the two sides of the bottom surface of a lifting plate seat 24 are inserted into the hydraulic guide seats 22, a piston rod of the hydraulic cylinder 23 is connected with a lifting connecting plate 242 arranged on the side wall of the lifting plate seat 24, a central connecting seat 25 is arranged at the center of the bottom surface of the lifting plate seat 24, an extending connecting block 251 is arranged at the bottom surface;
a T-shaped sliding groove 203 is formed in the rear end face of the working groove 201, the telescopic arm 5 is inserted into the transverse part of the T-shaped sliding groove 203, a guide through groove 202 communicated with the T-shaped sliding groove 203 is formed in the top face of the base 2 and is located right behind the working groove 201, cylinder mounting plates 551 are arranged on the front side and the rear side of the guide through groove 202, a sliding cylinder 55 is mounted between the two cylinder mounting plates 551, and a connecting protrusion 56 formed in the top face of the telescopic arm 5 is connected with the sliding cylinder 55; the pressing mold box 4 is rotatably arranged on the front end face of the telescopic arm 5, the front end of the top face of the telescopic arm 5 is provided with a motor groove 51 and a vertical seat 53, the top face of the vertical seat 53 is provided with a high-pressure air nozzle 54, a rotating motor 52 is arranged in the motor groove 51, an output shaft of the rotating motor 52 is connected with a central rotating shaft 49 of the pressing mold box 4, the bottom face of the working groove 201 is provided with a supporting guide rail 21, a mold box guide block 46 arranged on the bottom face of a mold box bottom plate 42 is slidably arranged on the supporting guide rail 21, and the bottom face of the telescopic arm 5 is provided with a plurality of movable guide blocks 57 matched with the supporting guide rail 21; the setting of rotating electrical machines 52 can realize that the suppression diaphragm capsule is fast rotatory about the small range, can rock the magnesia carbon brick raw materials in the box to evenly distributed state automatically to can make the more even of suppression of magnesia carbon brick embryo in follow-up course of working, improve the suppression quality of brick embryo.
A pair of supporting frames 31 are arranged on the top surface of the base 2 and at the rear ends of the left side and the right side of the working groove 201, the discharging barrel 32 is fixed between the top plates of the two supporting frames 31, the discharging channel 33 is arranged between the inclined plates arranged on the two sides of the bottom of the discharging barrel 32, the horizontal part of the bending discharging plate 34 is inserted in the discharging channel 33, a reset tension spring 341 is connected between the vertical part of the bending discharging plate 34 and the rear side wall of the discharging channel 33, the horizontal feeding plate 35 is inserted above the front side wall of the discharging channel 33, the bottom surface of the horizontal feeding plate 35 positioned outside the discharging channel 33 is provided with a longitudinal straight rack 351, a pair of mounting arms 36 are arranged on the front side wall of the discharging channel 33 and below the horizontal feeding plate 35, a central gear 37 meshed with the longitudinal straight rack is rotatably arranged between the two mounting arms 36, the left end of the rotating shaft of the central gear 37, a right-angle transmission frame 27 with a vertical straight rack as a rear side plate is arranged on the rear side wall of the central connecting seat 25, and a transmission gear 38 is meshed with the vertical straight rack on the right-angle transmission frame 27; combine fig. 4, when right angle drive frame 27 down moved, vertical spur rack on right angle drive frame 27 meshes mutually and drives drive gear 38 anticlockwise rotation, sun gear 37 also anticlockwise rotates this moment, sun gear 37 then drives horizontal feed plate 35 and moves outward, thereby can make horizontal feed plate 35 be in the open mode, magnesia carbon brick raw materials in blowing bucket 32 can fall into unloading passageway 33 automatically, horizontal feed plate 35 and the setting of bending unloading board 34 have decided the quantity of the magnesia carbon brick raw materials in unloading passageway 33, can guarantee that the quantity of the magnesia carbon brick raw materials that gets into in the embossing mold box at every turn is unanimous, the shape size of having guaranteed every magnesia carbon brick embryo is unified, in addition, the automatic feed of magnesia carbon brick raw materials has been realized to the lift action that utilizes central connecting seat, extra drive arrangement has been saved, and the production cost is saved.
The front end of the top surface of the pressing die box 4 is provided with a containing groove 402, a coating bottom plate 47 is arranged in the containing groove 402 in a sliding manner, a pair of roll shaft mounting plates 48 are arranged on the left side and the right side of the top surface of the coating bottom plate 47, the coating roller 43 is rotatably mounted between the two roll shaft mounting plates 48, and a containing tension spring is connected between the center of the bottom surface of the containing groove 402 and the bottom surface of the coating bottom plate 47; a pair of transmission through grooves 403 communicated with the accommodating groove 402 are formed in the left side and the right side of the front end of the bottom surface of the pressing die box 4, two driving cylinders 44 are mounted in a pair of grooves formed in the left side and the right side of the bottom surface of the pressing die box 4, piston rods of the driving cylinders 44 are connected with the discharging connecting frames 45 arranged on the bottom surface of the die box bottom plate 42, an L-shaped transmission frame 451 is arranged on the front side wall of each discharging connecting frame 45, and the vertical part of each L-shaped transmission frame 451 faces the transmission through groove 403 on the corresponding side; drive actuating cylinder 44 and can release magnesium carbon brick embryo and paint roller 43 simultaneously, paint roller 43 just in time can realize paining the automation on magnesium carbon brick embryo surface after magnesium carbon brick embryo gets into vertical magazine 11, and magnesium carbon brick embryo does not mix with any process that pauses from the ejection of compact to the whole in-process of paining the flame retardant coating, can make the magnesium carbon brick embryo that paints stand immediately and get into the stoving room, has improved the bonding effect of flame retardant coating and magnesium carbon brick embryo.
A hollow long gear 41 concentric with the rotation center of the pressing mold box 4 is fixed on the front side wall of the pressing mold box 4, a vertical material discharging box 11 is slidably arranged on two transverse guide rails 13 on the top surface of the conveyor belt 1, a limiting groove 111 is arranged on the right side wall of the vertical material discharging box 11, a transverse straight rack 12 meshed with the hollow long gear 41 is arranged on the front side wall of the vertical material discharging box 11, a positioning plate 14 is arranged on the left side of the vertical material discharging box 11, a positioning column is arranged on the right side wall of the positioning plate 14, a return spring 15 is sleeved on the positioning column, one end of the return spring 15 is connected to the positioning plate 14, and the other end of the return spring; when the pressing die box 4 rotates anticlockwise, the hollow long gear 41 can drive the transverse straight rack 12 to move rightwards, so that the vertical material discharging box 11 can be slowly close to the pressing die box 4, when the pressing die box 4 rotates to a vertical state, the vertical material discharging box 11 can be very close to the pressing die box 4, the brick blanks in the pressing die box 4 are pushed into the vertical material discharging box 11 to be more easily and stably, the coating roller 43 is in a coating process, the hollow long gear 4 and the transverse straight rack 12 are always in a meshing state, the position of the vertical material discharging box 11 is kept still until the coating is finished, the hollow long gear 4 is separated from the meshing with the transverse straight rack 12, the vertical material discharging box 11 can reset, the adjustment of the position 11 of the vertical material discharging box can be realized through the rotation of the pressing die box 4, the feeding is convenient, the step of manually adjusting the magnesium carbon brick blanks to the vertical state in the traditional processing procedure can be omitted, the cost is saved, the efficiency is improved, the contact between manpower or machines and the surface of the magnesia carbon brick blank is avoided in the whole process from the press forming to the final drying and roasting of the magnesia carbon brick blank, and the quality of the magnesia carbon brick blank is further improved.
The method for quickly coating the refractory coating on the surface of the magnesia carbon brick comprises the following steps: the sliding cylinder 55 moves backwards to enable the telescopic arm 5 to extend into the T-shaped sliding chute 203, the pressing mold box 4 moves backwards to be right below a discharging channel 33 arranged at the bottom of the discharging barrel 32, a vertical seat 53 arranged at the front end of the top surface of the telescopic arm 5 drives a bending discharging plate 34 in the discharging channel 33 to be opened, magnesia carbon brick raw materials in the discharging channel 33 fall into a discharging groove 401 in the pressing mold box 4, and a rotating motor 52 in the telescopic arm 5 drives the pressing mold box 4 to rotate left and right in a small range to enable the magnesia carbon brick raw materials in the discharging groove 401 to tend to be average; the sliding cylinder 55 is reset, the pressing mold box 4 moves forwards to be under the pressing block 26, the pressing block 26 presses and forms the magnesia carbon brick raw material in the feeding groove 401 to obtain a brick blank under the action of the pressing cylinder 23, the horizontal feeding plate 35 in the feeding channel 33 is in an open state in the pressing process of the pressing block 26, the magnesia carbon brick raw material in the feeding barrel 32 automatically falls into the feeding channel 33, and after the pressing block 26 is reset, the horizontal feeding plate 35 is closed; the sliding cylinder 55 moves forward, the pressing die box 4 continues to move forward and moves to the front conveyor belt 1, under the action of the rotating motor 52, the pressing die box 4 rotates 90 degrees, at the moment, the magnesia carbon brick blank in the feeding groove 401 is adjusted to be in a vertical state and is aligned with the vertical discharging box 11 on the conveyor belt 1, the two driving cylinders 44 arranged at the bottom of the pressing die box 4 push out the die box bottom plate 42 and the coating roller 43 at the same time, the die box bottom plate 42 pushes the magnesia carbon brick blank into the limiting groove 111 in the vertical discharging box 11, and the coating roller 43 becomes in a vertical state and just coats the refractory coating on the fire-facing surface of the magnesia carbon brick blank in the process that the pressing die box 4 moves backward and resets.
In addition, when the telescopic arm 5 moves forwards and the high-pressure gas nozzle 54 moves to the lower part of the pressed block 26, the high-pressure gas nozzle 54 sprays high-pressure gas to clean the bottom of the pressed block 26; the arrangement of the die box guide block 46, the support guide rail 21 and the movable guide block 57 can ensure that the die box bottom plate 42 can keep a horizontal state in the pressing process, the pressing quality is improved, and the movable guide block 57 can reduce the bearing capacity of the telescopic arm 5 and prevent the telescopic arm 5 from deforming when the telescopic arm 5 extends forwards for a longer distance.
The foregoing is merely exemplary and illustrative of the present invention and various modifications, additions and substitutions may be made by those skilled in the art to the specific embodiments described without departing from the scope of the invention as defined in the following claims.
Claims (10)
1. A high temperature resistant novel magnesia carbon brick which is characterized in that: the material is prepared by processing the following raw materials in parts by weight: 8-15 parts of crystalline flake graphite powder, 65-80 parts of fused magnesia granules, 2-4 parts of an additive, 6-10 parts of mullite powder, 1-3 parts of a binder and 5-12 parts of water;
the granularity of the flake graphite powder is less than or equal to 0.088mm, and the content of magnesium oxide in the fused magnesia powder is more than 98 percent;
the powder with the particle diameter of the fused magnesia particles smaller than 1mm and the particles with the particle diameter of 1-3mm and the particle diameter of 3-5mm are mixed according to the weight ratio of 1: 0.5-1.5: 0.7-2, and mixing uniformly;
the content of water glass in the adhesive is 3% -8%, the content of PVA is 4% -7% and the content of PVP is 0.8% -1%;
the production process of the novel high-temperature-resistant magnesia carbon brick comprises the following steps:
uniformly mixing the flake graphite powder, the fused magnesia granules and the additive according to a weight ratio by using a mixing device to obtain a magnesia carbon brick raw material, and pouring the magnesia carbon brick raw material into a discharge barrel (32) for later use;
step two, uniformly mixing mullite powder, a binder and water according to a weight ratio by using another mixing device to obtain a refractory coating, and uniformly smearing the refractory coating on a coating roller (43) in a pressing die box (4) for later use;
putting the magnesia carbon brick raw material into a pressing mold box (4), performing machine pressing to obtain a magnesia carbon brick blank, and smearing the refractory coating on the fire-facing surface of the magnesia carbon brick blank through a coating roller (43);
the method for quickly coating the refractory coating on the surface of the magnesia carbon brick comprises the following steps:
the pressing die box (4) firstly moves to the position right below the discharging barrel (32) for feeding, then the pressing die box (4) rotates left and right in a small range under the action of a rotating motor (52) to enable the magnesia carbon brick raw materials in the discharging groove (401) to tend to be average, then the pressing die box (4) moves forwards to the position right below a pressing block (26), and the pressing block (26) presses and forms the magnesia carbon brick raw materials to obtain a brick blank;
the pressing die box (4) continues to move forwards and moves to the conveyor belt (1) in front, under the action of the rotating motor (52), the pressing die box (4) rotates for 90 degrees and is aligned to the vertical material discharging box (11), two driving cylinders (44) arranged at the bottom of the pressing die box (4) push out the die box bottom plate (42) and the coating roller (43) simultaneously, the die box bottom plate (42) pushes a magnesium-carbon brick blank into a limiting groove (111) in the vertical material discharging box (11), and the coating roller (43) moves backwards and resets and just smears refractory coating on the fire-facing surface of the magnesium-carbon brick blank.
And step four, baking the magnesia carbon brick blank coated with the refractory material for 4 hours in an environment of 100 ℃, then heating the temperature to 170-180 ℃ for baking for 2 hours, then heating the temperature to 200-220 ℃ for baking for 2 hours, and finally preserving the heat for 1 hour in an environment of 210-220 ℃, wherein the refractory material and the magnesia carbon brick are firmly combined to obtain the finished high-temperature resistant magnesia carbon brick.
2. The novel high-temperature-resistant magnesia carbon brick according to claim 1, characterized in that: the additive is one or a mixture of more than one of silicon powder, aluminum powder, asphalt powder, silicon carbide, boron carbide and magnesium aluminum alloy powder.
3. The novel high-temperature-resistant magnesia carbon brick according to claim 1, characterized in that: the binding agent is one or the combination of two of phenolic resin, asphalt and pulp waste liquid.
4. The novel high-temperature-resistant magnesia carbon brick according to claim 1, characterized in that: the pressing die box (4) is movably arranged in a working groove (201) formed in the front end of the top surface of the base (2), a pair of hydraulic guide seats (22) are arranged on the front ends of the left side and the right side of the working groove (201) on the top surface of the base (2), a hydraulic cylinder (23) is arranged on the outer side wall of each hydraulic guide seat (22), vertical guide columns (241) arranged on two sides of the bottom surface of the lifting plate seat (24) are inserted into the hydraulic guide seats (22), a piston rod of each hydraulic cylinder (23) is connected with a lifting connecting plate (242) arranged on the side wall of the lifting plate seat (24), a central connecting seat (25) is arranged in the center of the bottom surface of the lifting plate seat (24), an extending connecting block (251) is arranged on the bottom surface of the central connecting seat (25), and a pressing block (26) is arranged on the;
a T-shaped sliding groove (203) is formed in the rear end face of the working groove (201), a telescopic arm (5) is inserted into the transverse part of the T-shaped sliding groove (203), a pressing die box (4) is rotatably arranged on the front end face of the telescopic arm (5), a rotating motor (52) is arranged in a motor groove (51) formed in the front end of the top face of the telescopic arm (5), an output shaft of the rotating motor (52) is connected with a central rotating shaft (49) of the pressing die box (4), a supporting guide rail (21) is arranged on the bottom face of the working groove (201), and a die box guide block (46) arranged on the bottom face of a die box bottom plate (42) is slidably arranged on the supporting guide rail (21);
the top surface of base (2) just is located left and right sides rear end of work groove (201) and is equipped with a pair of support frame (31), and storage bucket (32) are fixed between the roof of two support frames (31), and unloading passageway (33) are located between the hang plate that the bottom both sides of storage bucket (32) were equipped with, the horizontal part of flitch (34) is inserted and is established in unloading passageway (33) down in bending, is connected with extension spring (341) that resets between the vertical portion of flitch (34) and the rear side wall of unloading passageway (33) down in bending.
5. The novel refractory magnesia carbon brick as claimed in claim 4, wherein: a guide through groove (202) communicated with the T-shaped sliding groove (203) is formed in the top surface of the base (2) and is positioned right behind the working groove (201), cylinder mounting plates (551) are arranged on the front side and the rear side of the guide through groove (202), the sliding cylinder (55) is mounted between the two cylinder mounting plates (551), and a connecting bulge (56) formed in the top surface of the telescopic arm (5) is connected with the sliding cylinder (55); the bottom surface of the telescopic arm (5) is provided with a plurality of movable guide blocks (57) matched with the support guide rails (21).
6. The novel refractory magnesia carbon brick as claimed in claim 4, wherein: horizontal feed plate (35) are inserted and are established in the preceding lateral wall top of unloading passageway (33), and the bottom surface of horizontal feed plate (35) that is located the unloading passageway (33) outside is equipped with vertical spur rack (351), and the below that just is located horizontal feed plate (35) on the preceding lateral wall of unloading passageway (33) is equipped with a pair of installation arm (36), rotates between two installation arms (36) and is equipped with central gear (37) with vertical spur rack (351) engaged with, and the pivot left end of central gear (37) passes left installation arm (36) and is connected with drive gear (38), be equipped with right angle drive frame (27) that the posterior lateral plate is vertical spur rack on the posterior lateral wall of central connecting seat (25), vertical spur rack on drive gear (38) and right angle drive frame (27) meshes mutually.
7. The novel refractory magnesia carbon brick as claimed in claim 4, wherein: the front end of the top surface of the pressing die box (4) is provided with a containing groove (402), a coating bottom plate (47) is arranged in the containing groove (402) in a sliding mode, the left side and the right side of the top surface of the coating bottom plate (47) are provided with a pair of roll shaft mounting plates (48), a coating roller (43) is rotatably mounted between the two roll shaft mounting plates (48), and a containing tension spring is connected between the center of the bottom surface of the containing groove (402) and the bottom surface of the coating bottom plate (47); the left side and the right side of the front end of the bottom surface of the pressing die box (4) are provided with a pair of transmission through grooves (403) communicated with the containing groove (402), two driving cylinders (44) are installed in a pair of grooves formed in the left side and the right side of the bottom surface of the pressing die box (4), a piston rod of each driving cylinder (44) is connected with a discharging connecting frame (45) formed in the bottom surface of a die box bottom plate (42), the front side wall of each discharging connecting frame (45) is provided with an L-shaped transmission frame (451), and the vertical part of each L-shaped transmission frame (451) faces the transmission through groove (403) on the corresponding side.
8. The novel refractory magnesia carbon brick as claimed in claim 4, wherein: be fixed with on the preceding lateral wall of pressing die box (4) rather than the concentric hollow long gear (41) of self center of rotation, vertical feeding box (11) slide to set up on two transverse guide (13) that conveyer belt (1) top surface was equipped with, be equipped with on the preceding lateral wall of vertical feeding box (11) with hollow long gear (41) engaged with horizontal spur rack (12), the left side of vertical feeding box (11) is equipped with locating plate (14), is equipped with the reference column on the right side wall of locating plate (14) and overlaps on the reference column and is equipped with return spring (15), on locating plate (14) and the other end is connected on vertical feeding box (11) are connected to the one end of return spring (15).
9. The novel refractory magnesia carbon brick as claimed in claim 4, wherein: the top surface of the vertical seat (53) is provided with a high-pressure air nozzle (54).
10. The manufacturing process of the novel high-temperature-resistant magnesia carbon brick according to claim 1, which is characterized by comprising the following steps:
uniformly mixing the flake graphite powder, the fused magnesia granules and the additive according to a weight ratio by using a mixing device to obtain a magnesia carbon brick raw material, and pouring the magnesia carbon brick raw material into a discharge barrel (32) for later use;
step two, uniformly mixing mullite powder, a binder and water according to a weight ratio by using another mixing device to obtain a refractory coating, and uniformly smearing the refractory coating on a coating roller (43) in a pressing die box (4) for later use;
putting the magnesia carbon brick raw material into a pressing mold box (4), performing machine pressing to obtain a magnesia carbon brick blank, and smearing the refractory coating on the fire-facing surface of the magnesia carbon brick blank through a coating roller (43);
and step four, baking the magnesia carbon brick blank coated with the refractory material for 4 hours in an environment of 100 ℃, then heating the temperature to 170-180 ℃ for baking for 2 hours, then heating the temperature to 200-220 ℃ for baking for 2 hours, and finally preserving the heat for 1 hour in an environment of 210-220 ℃, wherein the refractory material and the magnesia carbon brick are firmly combined to obtain the finished high-temperature resistant magnesia carbon brick.
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