Production process and equipment of easily-cut high-purity magnesium brick

Abstract

The application relates to the technical field of magnesite brick production, and discloses an easy-to-cut high-purity magnesite brick production process and equipment, S1, raw material proportioning: 85-88 parts of fused high-purity magnesia powder, 7-9 parts of nano magnesia modified powder, 3-5 parts of single-crystal magnesia particles, 0.8-1.2 parts of lithium carbonate, 0.4-0.6 parts of yttrium oxide, 0.3-0.7 parts of calcium fluoride, 0.2-0.3 parts of silicon nitride micro powder, 0.3-0.7 parts of zirconium oxide and 0.5-1.0 parts of sodium alginate; S2, material mixing: the screened and proportioned raw materials are poured into a mixing mill to be subjected to first-stage dry mixing and then second-stage wet mixing; when the bearing plate drives the brick to move and cut, the folding rod and the piston rod are also driven to move, so that the water source in the water tank can enter the piston pipe; after the bearing plate returns to the starting position, the folding rod drives the piston rod to enter the piston pipe again, and the water source in the piston pipe is extruded, so that the water source enters the bearing plate through the water outlet pipe, and then the surface of the bearing plate is washed out through the water spraying holes.

Description

Technical Field

[0001] This invention relates to the field of magnesium brick production technology, specifically to a process and equipment for producing easily cut high-purity magnesium bricks. Background Technology

[0002] Magnesia bricks have periclase as their main crystalline phase and possess the typical characteristics of general alkaline refractories, but their thermal shock resistance is relatively poor. Magnesia bricks are classified into fired magnesia bricks and unfired magnesia bricks. Fired magnesia bricks are further divided into silicate-bonded magnesia bricks, directly bonded magnesia bricks, and rebonded magnesia bricks. Unfired magnesia bricks are further divided into chemically bonded magnesia bricks and bitumen-bonded magnesia bricks.

[0003] A search revealed a Chinese patent document disclosing a brick surface cutting device [Announcement No.: CN220219166U]. This brick surface cutting device includes a frame, a support frame on one side of the frame, a transmission component on one side of the support frame, a saw disc rotatably connected to the output end of the transmission component, a movable plate on the top of the frame, and a cutting groove located at the bottom of the saw disc.

[0004] The cutting equipment disclosed in this patent can improve the cutting quality, but it still has shortcomings in use. Although it can cut bricks, it often sprays cooling water on the cutting disc and the brick during cutting. When the cutting disc rotates at high speed, it splashes water and impurities forward, which can easily splash onto the surface of the workers. After each cut, a small amount of impurities will be mixed on the surface of the brick placement table. When a new brick is placed on the surface, it is easy for it to lift up due to the accumulation of impurities, which will affect the subsequent cutting effect. Summary of the Invention

[0005] The purpose of this invention is to provide a production process and equipment for easily cut high-purity magnesia bricks, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a production process for easily cut high-purity magnesia bricks, comprising the following steps: S1. Raw material ratio: 85-88 parts of fused high-purity magnesium oxide powder, 7-9 parts of nano-modified magnesium oxide powder, 3-5 parts of single-crystal magnesium oxide particles, 0.8-1.2 parts of lithium carbonate, 0.4-0.6 parts of yttrium oxide, 0.3-0.7 parts of calcium fluoride, 0.2-0.3 parts of silicon nitride micro powder, 0.3-0.7 parts of zirconium oxide, and 0.5-1.0 parts of sodium alginate; S2. Material mixing: Pour the screened and proportioned raw materials into the mixer for primary dry mixing, and then for secondary wet mixing, so that the materials can be formed into a ball by hand and dispersed by light touch. S3, Compression molding: The mixed material is loaded into the mold in three batches using a layered feeding method. After each feeding, it is lightly pressed and then cold isostatically pressed using a brick press, with the pressure gradient gradually increasing. S4. Drying treatment: Place the pressed and shaped green body into a drying kiln, first slowly remove the free water, and continue to slowly raise the temperature until it reaches 200℃, hold it for 2 hours, and remove the crystal water in the binder. S5. Sintering treatment: The dried brick blanks are placed in a high-temperature kiln for sintering. Nitrogen gas is introduced into the kiln to replace the air three times. S6. Finishing: Using diamond wheel cutting equipment, the product dimensions are corrected to the design requirements, and the edges are chamfered to remove burrs and flash.

[0007] Preferably, the time required for primary dry mixing is 15 minutes (400 r / min). In wet mixing, a low-speed stirring and intermittent ultrasonic mode is used (stirring speed 200 r / min, ultrasonic power 300 W, 1 minute of ultrasonication every 5 minutes, total duration 15 minutes).

[0008] Preferably, the pressure gradient is 10MPa→30MPa→60MPa, with each pressure level held for 3 minutes, and the final molding pressure is 60MPa, held for 5 minutes.

[0009] Preferably, an easy-to-cut high-purity magnesia brick production equipment includes a cutting table, a cutting mechanism installed on top of the cutting table, and a support plate for conveying bricks. A shielding portion is installed on the surface of the cutting mechanism, and the shielding portion includes: The shield is an arc-shaped transparent structure that is rotatably connected to the surface of the fixing rod of the diamond cutting disc housing. The scraping component is located inside the baffle plate; A transmission component is installed between the support plate and the diamond cutting disc housing. When the support plate slides, the transmission component drives the scraper to achieve arc-shaped movement.

[0010] Preferably, the scraping element includes: A movable plate, one end of which rotates on the surface of the fixing rod of the diamond cutting disc housing, has a sliding plate that slides through the interior of the movable plate, and a scraper is fixed at the other end of the sliding plate; Spring 1 has its two ends fixed to the inner walls of the movable plate and the moving plate, respectively.

[0011] Preferably, the transmission component includes: Gear 1 is fitted onto the surface of the fixing rod of the diamond cutting disc housing and fixed to one side of the movable plate; A rack plate 1 is slidably connected to the surface of the diamond cutting disc housing, and the top of the rack plate 1 meshes with a gear 1; The connecting rod is fixed at one end to one side of the bearing plate, and the other end is slidably connected to the inside of the rack plate.

[0012] Preferably, it further includes a cleaning unit, the cleaning unit comprising: The cleaning plate is rotatably connected to both sides of the inner side of the top of the cutting table, and the cleaning plate is located at the position of the filter screen of the cutting table; Gear 2 is fixed on a rotating shaft that extends from the cleaning plate to the bottom of the cutting table; The second rack plate is slidably connected to the bottom of the cutting table and meshes with the second gear. A push plate is fixed to the other end of the second rack plate.

[0013] Preferably, the cleaning part further includes a spring, which includes a slide rod with one end fixed to the bottom of the rack plate 2, the other end of the slide rod sliding through the bottom of the cutting table, and a spring 2 sleeved on the surface of the slide rod, the two ends of the spring 2 being fixed to the bottom of the rack plate 2 and the bottom of the cutting table.

[0014] Preferably, it further includes a rinsing section, the rinsing section comprising: A piston tube is fixed on both sides of the bottom of the cutting table and connected to the water tank. A piston rod slides through the inside of the piston tube. The folded rod is fixed at both ends to one end of the piston rod and one side of the bearing plate, respectively. The water outlet pipe is connected at both ends to the piston tube and the vertical section of the support plate, respectively. Several water spray holes are opened on one side of the vertical end of the support plate, and the water spray holes are inclined downward. A one-way valve is installed on the surface of the inlet of the piston tube and on one end of the outlet tube.

[0015] Preferably, support plates are fixed on both sides of the outer surface of the diamond cutting disc at the cutting mechanism.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. This invention uses sodium alginate-silica sol composite environmentally friendly binder, which completely decomposes into carbon dioxide and water at high temperatures, leaving no harmful residues such as carbon and sulfur. This avoids the purity reduction problem caused by traditional organic binders. At the same time, by using lithium carbonate-boric acid composite salt and yttrium oxide as a composite flux system, the sintering temperature is reduced from the high temperature of traditional processes to a certain temperature, which greatly reduces energy consumption. Furthermore, the layered material distribution and gradient pressure cold isostatic pressing process improves the molding quality.

[0017] 2. When cutting bricks, the present invention can block water and impurities splashed during cutting by using a baffle plate. As the supporting plate moves the bricks during cutting, the transmission component can drive the scraper to scrape and wipe the inner cavity of the baffle plate, so that the staff can easily observe the cutting process.

[0018] 3. When the bearing plate moves and cuts the bricks, it also moves the folding rod and the piston rod together, allowing the water in the water tank to enter the piston tube. After the bearing plate returns to the starting position, the folding rod will drive the piston rod to enter the piston tube again and squeeze the water in the piston tube, so that the water enters the bearing plate through the water outlet pipe and then sprays out through the water spray hole to rinse the surface of the bearing plate. Attached Figure Description

[0019] Figure 1 This is a flow chart of the magnesium brick production process in this invention; Figure 2 This is a schematic diagram of the structure of the magnesium brick processing and cutting equipment in this invention; Figure 3 This is a schematic diagram of the left-side structure of the cutting device in this invention; Figure 4 This is a three-dimensional structural diagram of the cutting equipment in this invention; Figure 5 This is a partial bottom view of the cutting device in this invention; Figure 6 This is a schematic diagram of the cutting mechanism in this invention; Figure 7 This is a three-dimensional structural diagram of the shielding part in this invention; Figure 8 For the present invention Figure 7 A magnified schematic diagram of the structure at point A in the middle.

[0020] In the diagram: 100, cutting table; 200, cutting mechanism; 300, support plate; 400, shielding part; 410, shielding plate; 420, scraper; 421, movable plate; 422, moving plate; 423, spring one; 424, scraper; 430, transmission part; 431, connecting rod; 432, rack plate one; 433, gear one; 500, cleaning part; 510, cleaning plate; 520, gear two; 530, rack plate two; 540, push plate; 550, spring-loaded part; 551, slide rod; 552, spring two; 600, rinsing part; 610, piston tube; 620, piston rod; 630, folding rod; 640, water outlet pipe; 650, one-way valve; 660, water spray hole; 700, support plate. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Please see Figure 1-8 As shown, a production process for easily cut high-purity magnesia bricks includes the following steps: S1. Raw material ratio: 85-88 parts of fused high-purity magnesium oxide powder, 7-9 parts of nano-modified magnesium oxide powder, 3-5 parts of single-crystal magnesium oxide particles, 0.8-1.2 parts of lithium carbonate, 0.4-0.6 parts of yttrium oxide, 0.3-0.7 parts of calcium fluoride, 0.2-0.3 parts of silicon nitride micro powder, 0.3-0.7 parts of zirconium oxide, and 0.5-1.0 parts of sodium alginate; S2. Material Mixing: Pour the screened and proportioned raw materials into the mixer for primary dry mixing, followed by secondary wet mixing, so that the material can be formed into a ball by hand and dispersed easily by light touch. The primary dry mixing time is 15 minutes (400 r / min). In the wet mixing state, low-speed stirring and intermittent ultrasonic mode are used (stirring speed 200 r / min, ultrasonic power 300W, every 5 minutes, ultrasonic for 1 minute, total duration 15 minutes). Through the dry mixing mode, the particle size distribution can be used to form a preliminary skeleton structure after mixing, and the slight agglomeration can be broken by high-speed shearing. In the wet mixing state, the agglomeration of nanoparticles can be broken and the gaps between micron-sized particles can be filled. S3. Pressing and Molding: The mixed material is fed into the mold in three stages using a layered feeding method. After each feeding, it is lightly pressed and then cold isostatically pressed using a brick press. The pressure gradient gradually increases from 10MPa to 30MPa to 60MPa, with each stage held for 3 minutes. The final molding pressure is 60MPa, held for 5 minutes. This setting allows for initial rearrangement of the material particles at 10MPa for 3 minutes, expelling free air between particles and preventing air from being compressed into bubbles under high pressure, which would lead to porosity defects after sintering. The medium pressure of 30MPa is held for 3 minutes to further compact the material, allowing the nanoparticles to gradually fill the micron-sized gaps. At this point, stress accumulates slowly but does not reach the critical value. The final densification stage is reached at 60MPa for 5 minutes. Because the previous staged pressing has achieved uniform particle distribution, only uniform deformation occurs under high pressure, with no local stress abrupt changes. The cracking rate of the green body is reduced from 8%-10% in traditional one-time pressing to ≤2%. S4. Drying treatment: Place the pressed and shaped green body into a drying kiln, first slowly remove the free water, and continue to slowly raise the temperature until it reaches 200℃, hold it for 2 hours, and remove the crystal water in the binder. S5. Sintering treatment: The dried brick blanks are placed in a high-temperature kiln for sintering. Nitrogen gas is introduced into the kiln to replace the air three times. S6. Finishing: Using diamond wheel cutting equipment, the product dimensions are corrected to the design requirements, and the edges are chamfered to remove burrs and flash.

[0023] A production equipment for easily cut high-purity magnesia bricks includes a cutting table 100, a cutting mechanism 200 installed on the top of the cutting table 100, and a support plate 300 for conveying bricks. The surface of the cutting mechanism 200 is equipped with a shielding part 400. The shielding part 400 includes a shielding plate 410 rotatably connected to the surface of the fixing rod of the diamond cutting disc housing. The shielding plate 410 has an arc-shaped transparent structure. A scraper 420 is provided on the inner side of the shielding plate 410. A transmission component 430 is installed between the support plate 300 and the diamond cutting disc housing. When the support plate 300 slides, the transmission component 430 drives the scraper 420 to achieve arc-shaped movement.

[0024] The scraping component 420 includes a movable plate 421 that rotates at one end on the surface of the fixing rod of the diamond cutting disc housing. A movable plate 422 slides through the interior of the movable plate 421. A scraper 424 is fixed at the other end of the movable plate 422. Springs 423 are fixed at both ends between the movable plate 422 and the inner wall of the movable plate 421, respectively. When the transmission component 430 is subjected to force, it will drive the movable plate 421 to rotate and simultaneously drive the movable plate 422 to slide inside the movable plate 421. Through the elastic force of the spring 423, the movable plate 422 and the scraper 424 can always be driven to move outward, so that the scraper 424 is always in contact with the inner side of the shielding plate 410 for better wiping and cleaning.

[0025] The transmission component 430 includes a gear 433, which is sleeved on the surface of the fixing rod of the diamond cutting disc housing and fixed to one side of the movable plate 421. A rack plate 432 is slidably connected to the surface of the diamond cutting disc housing. The top of the rack plate 432 meshes with the gear 433. A connecting rod 431 is fixed to one side of the bearing plate 300. The other end of the connecting rod 431 is slidably connected to the inside of the rack plate 432. When the bearing plate 300 is pushed, it will drive the connecting rod 431 to move together. When the other end of the connecting rod 431 moves to the front end of the rack plate 432, it will drive the rack plate 432 to move and drive the gear 433 to rotate, thereby driving the scraper 420 to deflect at an angle.

[0026] It also includes a cleaning unit 500, which includes cleaning plates 510 rotatably connected to both sides of the inner cavity at the top of the cutting table 100. The cleaning plates 510 are located at the position of the filter screen of the cutting table 100. The cleaning plates 510 extend to the rotating shaft at the bottom of the cutting table 100 and a gear 520 is fixed thereon. A rack plate 530 is slidably connected to the bottom of the cutting table 100. The rack plate 530 meshes with the gear 520. A push plate 540 is fixed to the other end of the rack plate 530. After the rack plate 530 moves to a certain position, it will push the push plate 540 and drive the rack plate 530 to move together. At the same time, it will drive the gears 520 on both sides to rotate and drive the cleaning plates 510 to clean the filter screen.

[0027] The cleaning unit 500 also includes a spring-loaded component 550, which includes a slide rod 551 with one end fixed to the bottom of the rack plate 530. The other end of the slide rod 551 slides through the bottom of the cutting table 100. A spring 552 is sleeved on the surface of the slide rod 551. The two ends of the spring 552 are fixed to the bottom of the rack plate 530 and the bottom of the cutting table 100. When the rack plate 530 is no longer under force, the spring 552 will return the rack plate 530 to the starting position through its own elastic force, so as to facilitate subsequent use.

[0028] It also includes a rinsing unit 600, which includes piston tubes 610 fixed to both sides of the bottom of the cutting table 100. The piston tubes 610 are connected to a water tank. A piston rod 620 slides through the piston tubes 610. A folded rod 630 is fixed between one end of the piston rod 620 and one side of the support plate 300. A water outlet pipe 640 connects the piston tubes 610 and the vertical section of the support plate 300. Several water spray holes 660 are opened on one side of the vertical end of the support plate 300. The water spray holes 660 are inclined downwards. One-way valves 650 are installed on the surface of the inlet of the piston tube 610 and the surface of one end of the outlet pipe 640. When the support plate 300 moves, it will drive the folded rod 630 and the piston rod 620 to move together, so that the water source in the water tank will enter the piston tube 610. When the support plate 300 is pulled back to the starting position, the piston rod 620 will squeeze the water source in the piston tube 610, so that the water source enters the support plate 300 through the outlet pipe 640 and is sprayed out for rinsing through the spray hole 660.

[0029] Support plates 700 are fixed on both sides of the outer surface of the diamond cutting disc at the cutting mechanism 200, so as to limit and support the deflected shield 410.

[0030] Working principle: In use, the brick can be placed on top of the support plate 300, and then the baffle plate 410 is deflected down until it can block the cutting area. Then, the operator can push the support plate 300 and cut the brick through the cutting mechanism 200. Water stains and impurities splashed during cutting are blocked by the baffle plate 410. As the support plate 300 moves, it also drives the connecting rod 431 to move, and drives the rack plate 432 to move together. This causes the gear 433 and the movable plate 421 to deflect at an angle, and drives the scraper 424 to scrape and clean the water stains on the inner wall of the baffle plate 410 to facilitate subsequent cleaning. During observation, as the rack plate 432 moves backward, the cleaning unit 500 cleans the filter screen to facilitate the recycling of water that falls onto the cutting table 100. Simultaneously, as the support plate 300 moves, the folding rod 630 and piston rod 620 move together, allowing water from the tank to enter the piston tube 610. When the support plate 300 is pulled back to its starting position, the piston rod 620 squeezes the water in the piston tube 610, causing it to enter the support plate 300 through the outlet pipe 640 and be sprayed out through the spray nozzle 660, thus rinsing the surface of the support plate 300.

[0031] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0032] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A process for producing easily cut high-purity magnesia bricks, comprising the following steps: S1. Raw material ratio: 85-88 parts of fused high-purity magnesium oxide powder, 7-9 parts of nano-modified magnesium oxide powder, 3-5 parts of single-crystal magnesium oxide particles, 0.8-1.2 parts of lithium carbonate, 0.4-0.6 parts of yttrium oxide, 0.3-0.7 parts of calcium fluoride, 0.2-0.3 parts of silicon nitride micro powder, 0.3-0.7 parts of zirconium oxide, and 0.5-1.0 parts of sodium alginate; S2. Material mixing: Pour the screened and proportioned raw materials into the mixer for primary dry mixing, and then for secondary wet mixing, so that the materials can be formed into a ball by hand and dispersed by light touch. S3, Compression molding: The mixed material is loaded into the mold in three batches using a layered feeding method. After each feeding, it is lightly pressed and then cold isostatically pressed using a brick press, with the pressure gradient gradually increasing. S4. Drying treatment: Place the pressed and shaped green body into a drying kiln, first slowly remove the free water, and continue to slowly raise the temperature until it reaches 200℃, hold it for 2 hours, and remove the crystal water in the binder. S5. Sintering treatment: The dried brick blanks are placed in a high-temperature kiln for sintering. Nitrogen gas is introduced into the kiln to replace the air three times. S6. Finishing: Using diamond wheel cutting equipment, the product dimensions are corrected to the design requirements, and the edges are chamfered to remove burrs and flash.

2. The production process for easily cut high-purity magnesia bricks according to claim 1, characterized in that: The time required for the first-stage dry mixing in step S2 is 15 minutes (400 r / min). In the wet mixing state, a low-speed stirring and intermittent ultrasonic mode is used (stirring speed 200 r / min, ultrasonic power 300 W, 1 minute of ultrasonication every 5 minutes, total duration 15 minutes).

3. The production process for easily cut high-purity magnesia bricks according to claim 1, characterized in that: In step S3, the pressure gradient is 10MPa→30MPa→60MPa, with each level held for 3 minutes, resulting in a final molding pressure of 60MPa, which is held for 5 minutes.

4. The production process for easily cut high-purity magnesia bricks as described in any one of claims 1-3, characterized in that, The cutting equipment used in S6 is an easy-to-cut high-purity magnesia brick production equipment, including a cutting table (100), a cutting mechanism (200) installed on the top of the cutting table (100), and a support plate (300) for conveying bricks. The surface of the cutting mechanism (200) is equipped with a shielding part (400), which includes: The shield (410) is an arc-shaped transparent structure and is rotatably connected to the surface of the diamond cutting disc housing fixing rod: The scraper (420) is located inside the baffle (410); The transmission component (430) is installed between the support plate (300) and the diamond cutting disc housing. When the support plate (300) slides, it drives the scraper (420) to achieve arc-shaped movement through the transmission component (430).

5. The production process for easily cut high-purity magnesia bricks according to claim 4, characterized in that, The scraper (420) includes: The movable plate (421) rotates at one end on the surface of the fixing rod of the diamond cutting disc housing. A sliding plate (422) slides through the interior of the movable plate (421), and a scraper (424) is fixed at the other end of the sliding plate (422). Spring 1 (423) is fixed at both ends to the inner walls of the movable plate (422) and the moving plate (421), respectively.

6. The production process for easily cut high-purity magnesia bricks according to claim 5, characterized in that, The transmission component (430) includes: Gear 1 (433) is sleeved on the surface of the fixing rod of the diamond cutting disc housing and fixed to one side of the movable plate (421); A rack plate (432) is slidably connected to the surface of the diamond cutting disc housing, and the top of the rack plate (432) meshes with a gear (433); The connecting rod (431) is fixed at one end to one side of the bearing plate (300), and the other end is slidably connected to the inside of the rack plate (432).

7. The production process for easily cut high-purity magnesia bricks according to claim 4, characterized in that, It also includes a cleaning unit (500), which includes: Cleaning plate (510) is rotatably connected to both sides of the inner top of the cutting table (100), and the cleaning plate (510) is located at the position of the filter screen of the cutting table (100); Gear 2 (520) is fixed on a rotating shaft that extends from the cleaning plate (510) to the bottom of the cutting table (100); The second rack plate (530) is slidably connected to the bottom of the cutting table (100) and meshes with the second gear (520). The other end of the second rack plate (530) is fixed with a push plate (540).

8. The production process for easily cut high-purity magnesia bricks according to claim 7, characterized in that: The cleaning unit (500) also includes a spring (550), which includes a slide rod (551) with one end fixed to the bottom of the rack plate (530). The other end of the slide rod (551) slides through the bottom of the cutting table (100). A spring (552) is sleeved on the surface of the slide rod (551). Both ends of the spring (552) are fixed to the bottom of the rack plate (530) and the bottom of the cutting table (100).

9. The production process for easily cut high-purity magnesia bricks according to claim 4, characterized in that, It also includes a rinsing unit (600), which includes: The piston tube (610) is fixed on both sides of the bottom of the cutting table (100) and connected to the water tank. A piston rod (620) slides through the inside of the piston tube (610). The folded rod (630) is fixed at both ends to one end of the piston rod (620) and one side of the bearing plate (300); The water outlet pipe (640) is connected at both ends to the piston pipe (610) and the vertical section of the support plate (300), respectively. A plurality of water spray holes (660) are provided on one side of the vertical end of the support plate (300), and the water spray holes (660) are inclined downward. A one-way valve (650) is provided on the inlet surface of the piston tube (610) and one end surface of the outlet tube (640).

10. The production process for easily cut high-purity magnesia bricks according to claim 4, characterized in that: Support plates (700) are fixed on both sides of the diamond cutting disc shell surface of the cutting mechanism (200).

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