CN114261002B

CN114261002B - Forming equipment and forming process for realizing high-compactness refractory prefabricated member

Info

Publication number: CN114261002B
Application number: CN202210020719.6A
Authority: CN
Inventors: 严培忠; 翁小燕; 李国群; 俞鑫英; 虞畅
Original assignee: Zhejiang Hongying Mingde High Temperature Materials Technology Co ltd
Current assignee: Zhejiang Hongying Mingde High Temperature Materials Technology Co ltd
Priority date: 2022-01-10
Filing date: 2022-01-10
Publication date: 2022-07-19
Anticipated expiration: 2042-01-10
Also published as: CN114261002A

Abstract

The invention relates to the field of steel making, in particular to a forming device and a forming process for realizing a high-compactness fire-resistant prefabricated member, which comprises a groove sunken in the ground, wherein a vibration table is fixed in the groove and is enclosed in a sealing gasket fixed on the ground, a sealing cabin is arranged at the upper part of the sealing gasket, the edge of the bottom surface of the sealing cabin is aligned with the sealing gasket, a negative pressure pumping device is communicated with the side surface of the sealing cabin, the top surface of the negative pressure pumping device is fixed at the end part of a screw rod shaft of an air cylinder, the air cylinder is fixed on a top plate of a fixing frame, a left side supporting plate and a right side supporting plate of the fixing frame are fixed on the ground, the left side supporting plate and the right side supporting plate are respectively fixed on the left outer side and the right outer side of the sealing gasket, slurry is prevented from being involved from a mold in the vibration process through negative pressure vibration, gas wrapped in the slurry is rapidly discharged and exhausted, the compactness of the prefabricated member is greatly improved, and the erosion of molten slag can be effectively resisted, plays a good role in blocking slag.

Description

Forming equipment and forming process for realizing high-compactness refractory prefabricated member

Technical Field

The invention relates to the field of steelmaking, in particular to a forming device and a forming process for realizing a high-compactness refractory prefabricated member.

Background

The refractory material goes through the development stage from shaping to unshaped state, particularly after the ultramicro powder and the high-efficiency water reducing agent are widely applied to the refractory material, the high-temperature service performance of the refractory castable is greatly improved, the unshaped state of the castable and the like is realized at a plurality of positions using refractory bricks, the refractory castable is used for the lining of thermal equipment, is directly baked for use without a firing process, and compared with the refractory bricks, the refractory castable has the characteristics of simple process (saving the firing process), energy conservation, low cost, convenience for mechanized construction and the like, and particularly, partial functional parts, special-shaped parts and the like are convenient to cast and form; however, the castable needs to be stirred by adding water and formed by vibration, in the process, because the slurry has higher viscosity, gas brought in the stirring and forming processes is difficult to discharge, and larger air holes remained in the material lining body weaken the material structure, so that the compactness of the prefabricated member is reduced, and the corrosion of external slag is aggravated and the prefabricated member is broken by inducing thermal shock damage when the prefabricated member is used;

source of pore formation of cast preforms: (1) adding water and stirring, and coiling the air into the material; (2) air is involved when the material is added into the mould; (3) air is involved from a mold gap in the slurry jumping process, and the air holes are finally left in the product because the gas in the slurry is difficult to discharge in the vibration molding process, especially in the vertical vibration process, the air holes are difficult to discharge because the height of the mold is larger and the air holes are difficult to rise, so that the air holes in the slurry are difficult to discharge, and the air holes are difficult to discharge, so that the air holes are left in the slurry, the density of the prefabricated part is finally reduced, the prefabricated part is easy to corrode when slag is blocked, and the prefabricated part is easy to damage by thermal shock and break, therefore, the removal degree of the air holes in the slurry in the prefabricated part molding process directly influences the performance of the finished prefabricated part, the removal effect of the air holes in the slurry in the prior art is poor, for example, in the invention patent with the application number of CN202011403904.0, the air discharge pipe with uneven length is inserted into the corundum base to be molded through the casting material, the air generated by the corundum-based castable in the forming die is pumped away by utilizing the exhaust holes on the exhaust pipe, so that the effect of exhausting air is achieved, the exhaust holes on the exhaust pipe are easily blocked in the exhaust process by the exhaust mode, the exhaust effect is very poor, in addition, when the castable is pulled out after the exhaust is finished, a large amount of castable can be adhered to the exhaust pipe, the waste of the castable is caused, and therefore, the feasibility of the operation is very poor, and the defoaming effect is also very poor; although the invention patent with application number CN202010997728.1 discloses a method for pumping air out of the heat preservation box by negative pressure, there is no disclosure of a method for completely eliminating air bubbles in the slurry, and this method of simply pumping negative pressure is not suitable for defoaming the slurry, especially for defoaming the slurry in a relatively high mold.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention aims to provide the forming equipment and the forming process for realizing the high-compactness refractory prefabricated member, so that the problems in the prior art are solved, the air is prevented from being involved into slurry from the outside of the mold in the vibration process in a negative pressure vibration mode, the gas wrapped in the slurry is quickly discharged and exhausted, the compactness of the prefabricated member is greatly improved, the erosion of molten slag can be effectively resisted, and a good slag blocking effect is achieved.

(II) technical scheme

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a realize former and molding process of fire-resistant prefab of high compactness, including sunken in the recess on ground, be fixed with the shaking table in the recess, and it is enclosed in being fixed in subaerial sealed the pad, the sealed bottom surface edge that upper portion was equipped with sealed cabin and sealed cabin aligns with sealed the pad, the side intercommunication of sealed cabin has takes out negative pressure equipment, the tip at the lead screw axle of cylinder is fixed to its top surface, the cylinder is fixed on the roof of mount, the left side backup pad and the right side backup pad of mount are fixed subaerial, the left side outside and the right outside at sealed pad are fixed respectively to left side backup pad and right side backup pad.

Preferably, a fixed box with an upper opening is fixed on the vibration table, a plurality of impact cylinders are fixed on the inner side wall of the fixed box, and impact balls are fixed at the end parts of screw rod shafts of the impact cylinders and are aligned to the side wall of the casting mold.

Preferably, the impact cylinders are obliquely upwards arranged and are provided with 8 impact balls, and the impact balls fixed on the impact cylinders are respectively aligned to the upper positions and the middle positions of the left, right, inner and outer side walls of the casting mold.

Preferably, the impact cylinder is arranged obliquely upward at 45 degrees.

Preferably, the impact ball is composed of iron powder and a flexible wrapping bag wrapping the outside of the iron powder.

Preferably, the upper surface of the rotary table is fixed on the bottom surface of the vibration table, and the motor is fixed on the lower surface of the rotary table and can rotate in a left-right circulating mode.

Preferably, the casting mold is V-shaped, and the lowest point of the material injection groove of the casting mold is just aligned to the center of the output shaft of the motor.

Preferably, the inner surface of the casting mold is coated with an aqueous silicone-based mold release agent.

Preferably, the middle position department of the left and right sides of pressurized cabin is equipped with vertical spout, and the internal surface of left side backup pad and right side backup pad is equipped with the slide rail with spout looks adaptation.

Preferably, the process steps are as follows:

s1, adding water, a defoaming agent, hollow low-melting-point explosion-proof fibers and 70 ℃ water-soluble explosion-proof fibers into the refractory casting powder, and stirring until slurry is formed;

s2, starting the vibration table, adding the slurry into a material injection groove of a casting mold placed on the vibration table, and vibrating while feeding the slurry until the slurry reaches the position required by the height of the prefabricated member;

s3, after the feeding is finished, starting the air cylinder, and extending a screw rod shaft of the air cylinder to enable the sealed cabin to slide downwards along the fixed frame until the edge of the bottom surface of the sealed cabin is overlapped with the sealing gasket and the sealing gasket is compressed;

s4, for the flat-vibrating casting mold: starting a negative pressure pumping device to pump negative pressure to the sealed cabin, and simultaneously vibrating a vibration table, pumping negative pressure while vibrating for a certain time, wherein the time for pumping negative pressure is 3-10 minutes; for a vertical vibration casting mold: when the negative pressure is pumped while the pouring mould is vibrated, 8 impact cylinders fixed on the inner side wall of the fixed box are started, impact balls fixed on the impact cylinders impact the side wall of the pouring mould in the 45-degree obliquely upward direction, the impact balls impact once, the motor rotates leftwards for 90 degrees and then returns to the original position, then the impact balls impact for the second time, the motor 18 rotates rightwards for 90 degrees and then returns to the original position, and the impact and rotation cycle is carried out for 3-10 minutes;

and S5, removing the sealed cabin after the negative pressure vibration forming is finished, manually floating the forming surface, moving to a specified position for curing for a certain time, demoulding, and baking to obtain a finished product.

(III) advantageous effects

1. The invention provides a molding device and a molding process for realizing a high-compactness refractory prefabricated part, wherein a vibration table is arranged in a groove sunken in the ground, a pouring mold is conveniently placed on the vibration table and taken down from the vibration table in a dragging mode on one hand, the molding device is very convenient, and on the other hand, the groove can limit the vibration table, so that the situation that the pouring mold is shaken down due to the fact that a top plate of the vibration table is inclined too much when the vibration amplitude is too large is avoided;

2. the lifting and the pressing of the sealed cabin are simultaneously realized through the air cylinder, the steps are simplified, and the pressing and sealing effects are good;

3. the performance of each aspect of the prefabricated part finished product formed by negative pressure vibration is greatly improved compared with that of a prefabricated part finished product formed by pure vibration, the compactness, the breaking strength and the compressive strength of the prefabricated part formed by negative pressure vibration are greatly improved, and the prefabricated part formed by negative pressure vibration is relatively stable, so that the prefabricated part can effectively block molten slag for a long time, is not easy to be corroded by the molten slag, has a stable structure and cannot be broken due to thermal shock damage;

4. aiming at the mould needing vertical vibration, the height of the mould is higher, and bubbles are difficult to rise, the invention makes the bubbles in the slurry rise to the upper part more easily through the impact of the impact ball on the casting mould by fixing the impact cylinder on the inner side wall of the fixed box and fixing the impact ball on the impact cylinder, thereby being eliminated by the negative pressure environment, playing a good defoaming role, and simultaneously having the following advantages compared with the direct vibration mode through the mode of knocking the side wall: on one hand, bubbles adhered to the side wall can be well loosened, and the bubbles adhered to the side wall are difficult to eliminate in a vibration mode, so that the effect can be achieved only through impact with high force;

5. according to the invention, the impact cylinder is arranged in an oblique upward mode, so that the impact cylinder gives an oblique upward force to the side wall of the casting mold when impacting the side wall of the casting mold, bubbles in the slurry can float upwards under the oblique upward force, the bubbles can float upwards to the upper part of the slurry more easily and are eliminated by a negative pressure environment, and the defoaming effect is better; the vibration of the vibration table can cause powder in the slurry to sink at the middle lower part of the casting mold, and the obliquely upward impact of the obliquely upward impact cylinder on the side wall of the casting mold can drive the powder at the middle lower part to the upper part, so that the powder is uniformly mixed, and the quality of the formed prefabricated member is ensured;

6. the invention sets the impact ball to be composed of iron powder and a flexible wrapping bag wrapping the outside of the iron powder, thus on one hand, the weight of the impact ball can be ensured, further ensuring the impact force, and tightly wrapping the iron powder through the flexible wrapping bag, so that the impact ball has a certain buffer effect when impacting the side wall of the casting mold, the side wall of the casting mold is not easy to be impacted and damaged, the protection effect is achieved, and simultaneously when the impact ball impacts the casting mold, it will deform to some extent and be squashed to some extent, so that, in relation to a metal ball strike, the contact surface of the casting mold and the side wall of the casting mold is greatly increased, the range covered by the impact is also greatly increased, the effect of the casting mould is greatly improved, and the problem that the side wall is easy to bump, dent and deform due to small contact surface with the side wall of the casting mould 16 caused by the impact of common metal balls is solved;

7. the rotating table is arranged, so that slurry in the casting mold can be rotated when the rotating table rotates left and right, the rotating process is very necessary, the slurry can be layered up and down in the continuous vibration process, powder can be deposited on the lower part of the casting mold, water is reserved on the upper part of the casting mold, the slurry in the casting mold is uneven, and the quality of a finally-formed prefabricated part is affected, so that the slurry is uniformly mixed through the left and right rotation process, meanwhile, the rotating process is also a process for accelerating the flow of the slurry, and further the flow and rising process of bubbles are accelerated, and in the process, the bubbles are matched with an impact cylinder to impact upwards in an inclined mode, so that the bubbles are easily lifted to the upper part of the casting mold to perform negative pressure defoaming, and the defoaming effect is very good;

8. compared with the release agents such as waste engine oil and the like commonly used in the conventional refractory prefabricated member, the organic silicon oil release agent is easy to exhaust gas, avoids the phenomenon that bubbles are retained in viscous engine oil, further plays a defoaming effect, ensures the compactness of the formed prefabricated member, and lays a foundation for exhausting the bubbles through negative pressure vibration;

9. the invention abandons the common aluminum powder of prefabricated part, AC foaming agent and other anti-explosion agents which are easy to add water to generate bubbles, and adjusts and changes the hollow low-melting-point anti-explosion fiber and 70 ℃ water-soluble anti-explosion fiber to achieve the same anti-explosion effect as the aluminum powder, but is not easy to generate bubbles;

10. the invention eliminates the problem of air entraining caused by the activity of the refractory powder, the naphthalene-based water reducing agent and the polycarboxylic acid water reducing agent in the water doping process as much as possible by adding the defoaming agent, such as a proper amount of polyether defoaming agent, and lays a foundation for the subsequent negative pressure vibration to exhaust bubbles completely.

Drawings

Fig. 1 is an overall schematic view of the present invention.

Fig. 2 is an overall schematic view of the present invention.

Fig. 3 is a schematic view of the position of the impact cylinder and the casting mold of the present invention.

FIG. 4 is a schematic view of a turntable on the bottom surface of a vibration table according to the present invention.

In the figure: 1-ground, 2-groove, 3-vibration table, 4-sealing pad, 5-sealed cabin, 6-negative pressure pumping device, 7-cylinder, 8-screw shaft, 9-fixing frame, 10-top plate, 11-left side supporting plate, 12-right side supporting plate, 13-fixing box, 14-impact cylinder, 15-impact ball, 16-pouring mold, 17-rotating table, 18-motor, 19-pouring groove, 20-lowest point and 21-sliding rail.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to fig. 1 to 4 in the embodiments of the present invention, 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 obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.

The invention provides a technical scheme that: a molding device and a molding process for realizing a high-compactness fire-resistant prefabricated part comprise a groove 2 sunken in a ground 1, a vibration table 3 is fixed in the groove 2 and is surrounded in a sealing gasket 4 fixed on the ground 1, a sealing cabin 5 is arranged on the upper portion of the sealing gasket 4, the bottom edge of the sealing cabin 5 is aligned with the sealing gasket 4, a negative pressure pumping device 6 is communicated with the side face of the sealing cabin 5, the top face of the negative pressure pumping device is fixed at the end portion of a screw shaft 8 of a cylinder 7, the cylinder 7 is fixed on a top plate 10 of a fixing frame 9, a left supporting plate 11 and a right supporting plate 12 of the fixing frame 9 are fixed on the ground 1, the left supporting plate 11 and the right supporting plate 12 are respectively fixed on the left outer side and the right outer side of the sealing gasket 4, the vibration table 3 is arranged in the groove 2 sunken in the ground 1 by the molding device, it needs to be explained that the upper surface of the vibration table 3 is flush with the ground, and on the one hand, the arrangement mode is convenient for placing a casting mold 16 on the vibration table 3 and taking the other hand On the other hand, the groove 2 can limit the vibration table 3, so that the situation that the top plate of the vibration table 3 is inclined too much to shake down the casting mold 16 when the vibration amplitude is too large is avoided, in the invention, when the vibration table 3 is inclined too much, the side wall of the groove 2 can block the top plate of the vibration table 3 to rebound the top plate in the opposite direction, the stability of the casting mold 16 in the whole vibration process is ensured, and the defect that the vibration table is arranged on the ground in the prior art is overcome; according to the forming equipment, the liftable sealed cabin 5 is arranged above the vibration table 3, so that negative pressure can be pumped while vibration is carried out on the pouring mold 16, the elimination rate of bubbles is greatly improved, the equipment controls the lifting of the sealed cabin 5 through the air cylinder 7, meanwhile, the air cylinder 7 can tightly press the sealed cabin 5 and the sealing gasket 4, and the sealing function is realized, but in the prior art, the lifting is realized through a motor, so that a good sealing effect is difficult to realize, the pressing and sealing functions are realized through additional pressing equipment, and the forming equipment is very complicated, the steps are simplified, and the lifting and sealing of the sealed cabin 5 are realized; the invention has obtained great improvement compared with all aspects of the finished product of prefabricated component that is shaped by the simple vibration through all aspects of performance of prefabricated component finished product that the negative pressure shakes the shaping, applicant, through measuring and comparing the relevant technical index under two different shaping modes of negative pressure shaking shaping and simple vibration shaping to the prefabricated component of the same material that other conditions are the same, obtain the data as following table 1:

therefore, the density, the breaking strength and the compressive strength of the prefabricated member formed by negative pressure vibration are greatly improved, and the prefabricated member formed by negative pressure vibration is stable, so that the molten slag can be effectively blocked for a long time, the prefabricated member is not easy to be corroded by the molten slag, and the prefabricated member is stable in structure and cannot be broken due to thermal shock damage.

A fixed box 13 with an opening at the upper part is fixed on the vibration table 3, a plurality of impact cylinders 14 are fixed on the inner side wall of the fixed box 13, impact balls 15 are fixed at the end parts of screw shafts of the impact cylinders 14, the impact balls 15 are aligned with the side wall of a casting mold 16, and the fixed box 13 further plays a role in stabilizing the casting mold 16, so that the casting mold 16 cannot topple in the vibration process, and potential safety hazards are eliminated; to the mould that need shake immediately, the mould height ratio of immediately shaking is higher, the bubble rises more difficultly, through be fixed with striking cylinder 14 on the inside wall of fixed case 13 and be fixed with striking ball 15 on striking cylinder 14, through striking ball 15 to the striking of casting die 16 for the bubble in the thick liquids rises to upper portion more easily, thereby eliminated by negative pressure environment, played fine defoaming effect, the mode through the strike to the side wall has following benefit for the mode of direct vibrations simultaneously: can carry out fine not hard up effect to the bubble of adhesion on the lateral wall on the one hand, because the adhesion bubble is difficult to be eliminated through the mode of vibrations on the lateral wall, just can have the effect only in the striking of big dynamics, on the other hand can strike in casting die 16's different places through the mode of striking, and the place of striking is more even like this, and the effect of defoaming is better.

The number of the impact cylinders 14 is 8, the impact balls 15 fixed on the impact cylinders are respectively aligned to the upper positions and the middle positions of the left inner side wall and the right outer side wall of the casting mold 16, and the impact cylinders 14 are arranged in an oblique upward mode, so that the impact cylinders 14 apply oblique upward force to the side walls of the casting mold 16 when impacting the side walls of the casting mold 16, bubbles in the slurry can float upwards under the oblique upward force, the bubbles float upwards more easily until the upper parts of the slurry are eliminated by a negative pressure environment, and the defoaming effect is better; the vibration of the vibration table 3 can cause the powder in the slurry to sink at the middle lower part of the casting mold 16, and at the moment, the obliquely upward impact of the obliquely upward impact cylinder 14 on the side wall of the casting mold 16 can drive the powder at the middle lower part to the upper part, so that the effect of uniform mixing is achieved, and the quality of the molded prefabricated member is ensured.

The striking cylinder 14 is set to be 45 degrees in the slant direction, so that the striking force is ensured and the slant striking is ensured, if the angle is smaller than 45 degrees, although the striking force can be ensured, the upward rising effect of bubbles is not good, if the angle is larger than 45 degrees, the rising effect of bubbles can be ensured, but the striking force is not enough, the applicant tests the striking of different angles of the striking cylinder 14 under the condition of ensuring the consistency of other conditions, and measures and compares technical indexes of finished products finally produced by striking different angles of the striking cylinder 14 to obtain the data as the following table 2:

therefore, when the impact cylinder 14 is arranged in the 45-degree inclined upward direction, the density, the breaking strength and the compressive strength of the prefabricated part are greatly improved, and therefore the mode that the impact cylinder 14 is arranged in the 45-degree inclined upward direction is selected.

Impact ball 15 comprises iron powder and the flexible parcel bag of parcel in the iron powder outside, impact ball 15 sets up to comprise iron powder and the flexible parcel bag of parcel in the iron powder outside, can guarantee the weight of impact ball 15 on the one hand like this, and then guarantee the dynamics of its striking, wrap up the iron powder tightly through flexible parcel bag simultaneously, make impact ball 15 have certain cushioning effect when striking the lateral wall of casting die 16 like this, be difficult to strike the lateral wall of casting die 16 bad, play the effect of protection, simultaneously when impact ball 15 strikes casting die 16, it can take place certain deformation, can be flattened certain degree, for the metal ball striking like this, its contact surface with the lateral wall of casting die 16 has greatly increased, the scope that its striking covered also can greatly increased, its effect also can obtain great promotion, avoided the produced contact surface of striking of ordinary metal ball simultaneously and casting die 16's lateral wall small and easy The side wall is collided with the dent to deform.

The upper surface of a rotating table 17 is fixed on the bottom surface of the vibration table 3, a motor 18 is fixed on the lower surface of the rotating table 17, the motor 18 can rotate left and right circularly, the rotating table 17 is arranged, when the rotating table 17 rotates left and right, the slurry in the casting mold 16 can be rotated, the rotating process is very necessary, because the slurry can be layered up and down in the process of continuous vibration, powder can be deposited at the lower part of the casting mold 16, and water is remained at the upper part, the slurry in the casting mold 16 is not uniform, so that the quality of a final formed prefabricated part is influenced, the slurry is uniformly mixed through the left and right rotating process, and the rotating process is also a process for accelerating the flow of the slurry, so that the flow and the rising of bubbles are accelerated, and the oblique impact of the impact cylinder 14 is matched in the process, the bubbles are easy to rise to the upper part of the casting mould 16 for negative pressure defoaming, and the defoaming effect is excellent.

The casting mould 16 is V-shaped, the lowest point 20 of the casting groove 19 of the casting mould 16 is just aligned with the center of the output shaft of the motor 18, so that the centrifugal force on the slurry on the left side and the right side of the lowest point 20 is the largest, the mixing effect on the two sides is the best, and the flowing speed of the slurry is also the largest.

The internal surface of the casting mould 16 is coated with water-based organic silicon release agent, compared with the release agent such as waste engine oil commonly used for the existing fire-resistant prefabricated member, the organic silicon oil release agent is easy to exhaust gas, the phenomenon that bubbles are retained in viscous engine oil is avoided, the defoaming effect is further played, the compactness of the formed prefabricated member is ensured, and a foundation is laid for exhausting the bubbles for the later negative pressure vibration.

The intermediate position department of the side is equipped with vertical spout about the sealed cabin 5, and the internal surface of left side support plate 11 and right side support plate 12 is equipped with the slide rail 21 with spout looks adaptation, carries on spacingly, conveniently goes up and down to sealed cabin 5 through this kind of mode, guarantees safety.

The process comprises the following steps:

s1, adding water, a defoaming agent, hollow low-melting-point explosion-proof fibers and 70 ℃ water-soluble explosion-proof fibers into the refractory casting powder, and stirring until slurry is formed; by adding the defoaming agent, a proper amount of polyether defoaming agent can be adopted, so that the problem of air entraining caused by the activity of refractory powder, a naphthalene-based water reducing agent and a polycarboxylic acid water reducing agent in the water mixing process is solved as far as possible, and a foundation is laid for the subsequent negative pressure vibration to exhaust bubbles completely; the common aluminum powder and AC foaming agent of the prefabricated part, which are easy to be added with water to generate bubbles, are abandoned, and the hollow low-melting-point explosion-proof fiber and the water-soluble explosion-proof fiber at 70 ℃ are adjusted and used, so that the explosion-proof effect same as that of the aluminum powder is achieved, but the bubbles are not easy to generate.

S2, starting the vibration table 3, adding the slurry into the material injection groove 19 of the casting mold 16 placed on the vibration table 3, and vibrating while feeding the slurry until the slurry reaches the position required by the height of the prefabricated member; when the slurry is added, the slurry is vibrated and defoamed at the same time, and a part of bubbles in the slurry can be eliminated in the step, so that preparation is made for exhausting the bubbles.

S3, after the feeding is finished, starting the air cylinder 7, extending a screw rod shaft 8 of the air cylinder 7, so that the sealed cabin 5 slides downwards along the fixed frame 9 until the bottom edge of the sealed cabin 5 is superposed with the sealing gasket 4, and tightly pressing the sealing gasket 4; meanwhile, the lifting and sealing of the sealed cabin 5 are realized, and the effect of pressing and sealing is good.

S4, for the flat-vibrating casting mold 16: starting the negative pressure pumping device 6 to pump negative pressure to the sealed cabin, and simultaneously, vibrating the vibration table 3, pumping negative pressure while vibrating for a certain time, wherein the time for pumping negative pressure is 3-10 minutes; for the vertical shock casting mold 16: when the negative pressure is pumped while vibrating, 8 impact air cylinders 14 fixed on the inner side wall of a fixed box 13 are started, impact balls 15 fixed on the impact air cylinders 14 perform 45-degree upward impact on the side wall of a casting mold 16, the impact balls 15 impact once, a motor 18 rotates left by 90 degrees and then returns to the original position, then the impact balls 15 perform secondary impact, the motor 18 rotates right by 90 degrees and then returns to the original position, and then the impact and rotation are circulated for 3-10 minutes; there are two molding methods for the preform according to the different molding surfaces: the horizontal vibration and vertical vibration are carried out, the horizontal vibration mould is low in height, negative pressure can be pumped while vibration is carried out, the time for pumping the negative pressure while vibration is carried out is 3-10 minutes, bubbles in the slurry can be exhausted, but the vertical vibration mould is high and narrow, the negative pressure can be pumped while vibration is carried out, the negative pressure pumping effect is not good due to the fact that the bubbles are difficult to rise due to the fact that the bubbles rise, at the moment, the upper positions of the left inner side wall, the right inner side wall and the middle position of the pouring mould 16 are impacted by 45 degrees in the inclined direction through 8 impacting air cylinders 14, so that the bubbles in the slurry can float upwards under the inclined force, the bubbles float upwards more easily until the upper portion of the slurry is eliminated by a negative pressure environment, and the defoaming effect is better; the vibration of the vibration table 3 can cause the powder in the slurry to sink at the middle lower part of the casting mold 16, and the obliquely upward impact of the obliquely upward impact cylinder 14 on the side wall of the casting mold 16 can drive the powder at the middle lower part to the upper part, so that the effect of uniform mixing is achieved, and the quality of the formed prefabricated member is ensured; the striking ball 15 fixed on the striking cylinder 14 strikes the side wall of the casting mold 16 in the 45-degree oblique upward direction, the striking ball 15 strikes once, the motor 18 returns to the original position after rotating for 90 degrees leftwards, then the striking ball 15 strikes for the second time, the motor 18 returns to the original position after rotating for 90 degrees rightwards, so that the striking and rotating circulation is carried out, the time is 3-10 minutes, the striking ball 15 strikes the motor 18 for one time and rotates once, the slurry is uniformly mixed, meanwhile, the rotating process is also a process for accelerating the flow of the slurry, and further the process for accelerating the flow and rising of the bubbles is carried out, the bubbles are lifted to the upper part of the casting mold 16 to be defoamed in a negative pressure mode easily in a matching mode that the striking cylinder 14 strikes upwards in the oblique direction, and the defoaming effect is excellent.

And S5, after the negative pressure vibration forming is finished, removing the sealed cabin 5, carrying out manual floating treatment on the forming surface, moving to a specified position, curing for a certain time, demoulding, and baking to obtain a finished product.

The working principle is as follows: when the prefabricated member needs to be produced, adding water, a defoaming agent, hollow low-melting-point explosion-proof fibers and 70 ℃ water-soluble explosion-proof fibers into refractory casting powder for stirring in the first step until slurry is formed; by adding the defoaming agent, a proper amount of polyether defoaming agent can be adopted, the problem of air entraining caused by the water doping process of refractory powder activity, a naphthalene-based water reducing agent and a polycarboxylic acid water reducing agent is eliminated as much as possible, and a foundation is laid for exhausting bubbles through negative pressure vibration later; secondly, starting the vibration table 3, adding the slurry into a material injection groove 19 of a casting mold 16 placed on the vibration table 3, vibrating while feeding the slurry until the slurry reaches the position required by the height of the prefabricated part, vibrating while defoaming in the slurry adding process, and eliminating a part of bubbles in the slurry in the step to prepare for exhausting the bubbles; after the third step of feeding is finished, the air cylinder 7 is started, the screw rod shaft 8 of the air cylinder 7 extends, so that the sealed cabin 5 slides downwards along the fixing frame 9 until the edge of the bottom surface of the sealed cabin 5 is overlapped with the sealing gasket 4, the sealing gasket 4 is compressed, the lifting and the sealing of the sealed cabin 5 are realized, and the compression and sealing effects are good; fourthly, starting the negative pressure pumping device 6 to pump negative pressure to the sealed cabin, and simultaneously, vibrating the vibration table 3, pumping negative pressure while vibrating for a certain time, wherein the time for pumping negative pressure is 3-10 minutes; for the vertical shock casting mold 16: the method comprises the following steps that 8 impact air cylinders 14 fixed on the inner side wall of a fixed box 13 are started while vibrating and sucking negative pressure, impact balls 15 fixed on the impact air cylinders 14 impact the side wall of a casting mold 16 in the 45-degree oblique upward direction, the impact balls 15 impact once, a motor 18 rotates leftwards for 90 degrees and then returns to the original position, then the impact balls 15 impact for the second time, the motor 18 rotates rightwards for 90 degrees and then returns to the original position, so that impact and rotation circulation is carried out for 3-10 minutes, and two molding modes are provided according to different prefabricated parts of molding surfaces: the horizontal vibration and vertical vibration are adopted, the horizontal vibration mould is low in height, only the negative pressure pumping is needed while the vibration is carried out, the negative pressure pumping is carried out while the vibration is carried out for 3-10 minutes, bubbles in the slurry can be exhausted, but the vertical vibration mould is high in height and narrow, the negative pressure pumping is carried out while the vibration is carried out, as the bubbles are difficult to rise in the rising mode, the negative pressure pumping effect is not good, the upper positions and the middle positions of the left inner side wall and the right inner side wall of the pouring mould 16 are impacted obliquely at 45 degrees by 8 impacting cylinders 14, the bubbles in the slurry can float upwards under oblique force, the bubbles can float upwards more easily until the upper portion of the slurry is eliminated by a negative pressure environment, the defoaming effect is better, the vibration of the vibration table 3 can cause the powder in the slurry to sink at the middle lower portion of the pouring mould 16, and the obliquely upwards impacting of the impacting cylinders 14 on the side walls of the pouring mould 16 can impact the powder at the middle lower portion towards the direction towards the lower portion of the side wall of the pouring mould 16 The upper part of the casting mold has the function of uniform mixing, the quality of the formed prefabricated part is ensured, the impact ball 15 fixed on the impact cylinder 14 impacts the side wall of the casting mold 16 in the 45-degree oblique upward direction, the impact ball 15 impacts once, the motor 18 returns to the original position after rotating 90 degrees leftwards, then the striking ball 15 strikes for the second time, the motor 18 returns to the original position after rotating 90 degrees to the right, thus the striking and rotating cycle is carried out for 3-10 minutes, the slurry is uniformly mixed by the way that the impact ball 15 impacts the primary motor 18 to rotate once, meanwhile, the rotating process is also a process for accelerating the flow of the slurry and further accelerating the rising process of the bubble flow, in the process, the impact cylinder 14 is matched for oblique upward impact, so that bubbles can easily rise to the upper part of the casting mold 16 for negative pressure defoaming, and the defoaming effect is excellent; fifthly, after the negative pressure vibration forming is finished, the sealed cabin 5 is removed, the forming surface is manually leveled, the forming surface is moved to a designated position for curing for a certain time, and then demoulding and baking are carried out to obtain a finished product; through the steps, bubbles mixed in the slurry can be fully eliminated in the forming process of the prefabricated member, the compactness of the prefabricated member is greatly improved, the erosion of molten slag can be effectively resisted, and a good slag blocking effect is achieved.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A forming device for realizing a high-compactness refractory prefabricated member is characterized by comprising a groove (2) sunken in the ground (1), wherein a vibration table (3) is fixed in the groove (2), and the sealing gasket is enclosed in a sealing gasket (4) fixed on the ground (1), a sealing cabin (5) is arranged on the upper part of the sealing gasket (4), the edge of the bottom surface of the sealing cabin (5) is aligned with the sealing gasket (4), a negative pressure pumping device (6) is communicated with the side surface of the sealing cabin (5), the top surface of the air cylinder is fixed at the end part of a screw rod shaft (8) of the air cylinder (7), the air cylinder (7) is fixed on a top plate (10) of a fixed frame (9), a left supporting plate (11) and a right supporting plate (12) of the fixing frame (9) are fixed on the ground (1), the left side supporting plate (11) and the right side supporting plate (12) are respectively fixed on the left outer side and the right outer side of the sealing gasket (4);

a fixed box (13) with an opening at the upper part is fixed on the vibration table (3), a plurality of impact cylinders (14) are fixed on the inner side wall of the fixed box (13), impact balls (15) are fixed at the end parts of screw rod shafts of the impact cylinders (14), and the impact balls (15) are aligned to the side wall of a casting mold (16);

the number of the impact cylinders (14) is 8, the impact balls (15) fixed on the impact cylinders are obliquely arranged upwards and respectively aligned to the upper positions and the middle positions of the left inner side wall and the right outer side wall of the casting mold (16);

the impact cylinder (14) is arranged in an inclined upward direction at an angle of 45 degrees;

the impact ball (15) consists of iron powder and a flexible wrapping bag wrapped outside the iron powder;

the upper surface of revolving stage (17) is fixed with on the bottom surface of vibrations platform (3), the lower surface of revolving stage (17) is fixed with motor (18), motor (18) can carry out left right circular rotation.

2. A forming apparatus for realizing high-density fire-resistant prefabricated member according to claim 1, characterized in that the casting mold (16) is V-shaped, and the lowest point (20) of the feeding groove (19) of the casting mold (16) is just aligned with the center of the output shaft of the motor (18).

3. A forming apparatus to realise a high-compactness refractory preform according to claim 1, characterised in that the inner surface of said casting mould (16) is coated with an aqueous silicone type release agent.

4. The forming equipment for realizing the high-compactness refractory prefabricated member according to the claim 1, characterized in that a vertical sliding groove is arranged at the middle position of the left side surface and the right side surface of the sealed cabin (5), and the inner surfaces of the left side supporting plate (11) and the right side supporting plate (12) are provided with a sliding rail (21) matched with the sliding groove.

5. A forming process for realizing a high-compactness refractory preform, which is characterized by relating to the forming equipment of any one of claims 1 to 4, and comprises the following specific steps:

s2, starting the vibration table (3), adding the slurry into a material injection groove (19) of a casting mold (16) placed on the vibration table (3), and vibrating while feeding the slurry until the slurry reaches the position required by the height of the prefabricated member;

s3, starting the air cylinder (7) after the feeding is finished, extending a screw rod shaft (8) of the air cylinder (7) to enable the sealed cabin (5) to slide downwards along the fixed frame (9) until the edge of the bottom surface of the sealed cabin (5) is overlapped with the sealing gasket (4), and pressing the sealing gasket (4);

s4, for the flat-vibrating casting mould (16): starting a negative pressure pumping device (6) to pump negative pressure to the sealed cabin, and simultaneously vibrating a vibration table (3), wherein the negative pressure is pumped while vibrating for a certain time, and the time for pumping the negative pressure is 3-10 minutes; for a vertical-seismic casting mold (16): when the negative pressure is pumped while the vibration is carried out, 8 impact cylinders (14) fixed on the inner side wall of a fixed box (13) are started, impact balls (15) fixed on the impact cylinders (14) impact the side wall of a casting mold (16) in the 45-degree oblique upward direction, the impact balls (15) impact once, a motor (18) rotates for 90 degrees leftwards and returns to the original position, then the impact balls (15) impact for the second time, the motor (18) rotates for 90 degrees rightwards and returns to the original position, and then the impact and rotation cycle is carried out for 3-10 minutes;

and S5, after the negative pressure vibration molding is finished, removing the sealed cabin (5), manually floating the molding surface, moving to a specified position for curing for a certain time, demolding, and baking to obtain a finished product.