Magnesium oxide production preparation system and drying device thereof

Abstract

The present application relates to the field of magnesium oxide preparation, in particular to a magnesium oxide production preparation system and a drying device thereof. The magnesium oxide production preparation drying device comprises a drying cylinder, a plurality of guide plates, a scraper plate and a transmission control mechanism. The guide plates and the scraper plate are rotationally arranged in the drying cylinder, and the rotation centers are deviated to the two sides. The transmission control mechanism is transmissionally connected with the guide plates and the scraper plate. In the drying process, part of the guide plates are deflected under the gravity of the material and are deflected with the scraper plate under the action of the transmission control mechanism. Meanwhile, the scraper plate has a reverse rotation trend relative to the guide plate under the gravity of the material, and can resist the guide plate. Thus, the angle of the guide plate and the scraper plate can be self-adaptively adjusted according to the material at the feeding end and the material in the drying cylinder, and the feeding speed is adjusted, so as to effectively solve the problem of material accumulation at the feeding end.

Description

Technical Field

[0001] This invention relates to the field of magnesium oxide preparation, and more specifically to a magnesium oxide production and preparation system and its drying device. Background Technology

[0002] Magnesium oxide is a basic oxide with the general properties of basic oxides. It belongs to the category of cementing materials and is a white or grayish-white powder. It is odorless, tasteless, and non-toxic, and is a typical alkaline earth metal oxide. Magnesite and dolomite are the main raw materials for producing magnesium oxide. Magnesite can be calcined in a furnace at 950℃, followed by cooling, crushing, screening, and drying to obtain light-calcined magnesium oxide. Related technologies typically use rotary drum dryers to dry magnesium oxide. Rotary drum dryers utilize lifting plates on the inner wall of the drum, combined with the drum's rotation, to lift and drop the material, achieving uniform and efficient drying. Simultaneously, the tilting of the lifting plates guides the material towards the discharge end for easy unloading, as illustrated in the rotary drum dryer disclosed in patent application CN 103776244 B. However, in existing rotary drum dryers, the lifting plates are at a fixed angle, making it impossible to adjust the feeding speed. This can easily lead to material accumulation at the inlet, affecting drying efficiency and effectiveness, and consequently, the finished product qualification rate.

[0003] The information disclosed in the background section of this invention is intended only to enhance the understanding of the general background of this invention, and should not be construed as an admission or in any way implying that such information constitutes prior art known to those skilled in the art. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention proposes a magnesium oxide production and preparation system and its drying device to solve the problem of unsatisfactory drying effects in existing magnesium oxide production processes.

[0005] The present invention provides a drying apparatus for the production and preparation of magnesium oxide, which adopts the following technical solution: including: The drying cylinder is capable of rotating around its own axis. One end of the drying cylinder is the feed end, and the other end is the discharge end. Several guide plates are located at the feed end of the drying cylinder and are evenly distributed along the circumference. The guide plates are rotatably mounted on the inner wall of the drying cylinder. The rotation axis of the guide plates is perpendicular to the axis of the drying cylinder and biased towards the side of the guide plates closer to the feed end. The guide plates are configured to be able to swing and reset within a preset angle range, and the swing direction enables them to guide the material towards the discharge end. The lifting plates are located on the side of the guide plate away from the feed end. There are multiple sets of lifting plates, with multiple lifting plates in each set. Multiple lifting plates in the same set are evenly distributed along the circumference of the drying cylinder. Adjacent sets of lifting plates are spaced apart along the axial direction of the drying cylinder. The lifting plates are rotatably mounted on the inner wall of the drying cylinder. The rotation axis of the lifting plates is perpendicular to the axis of the drying cylinder and biased towards the side of the lifting plates closer to the discharge end. The lifting plates are configured to be able to swing and reset within a preset angle range, and the swing direction enables them to guide the material towards the discharge end. The transmission control mechanism is a transmission connection between the guide plate and the lifting plate, and is configured to enable all guide plates to swing synchronously and drive the lifting plate to swing in the same direction when the guide plates swing.

[0006] Optionally, the transmission control mechanism includes a drive ring and several transmission rings. The drive ring and transmission rings are coaxially rotatably sleeved on the outside of the drying cylinder. Small gears are provided on the rotating shafts of the guide plate and the lifting plate. The drive ring corresponds to the guide plate, with the end face of the drive ring near the feed end meshing with the small gear on the guide plate, and the end face of the drive ring near the discharge end having a gap with the small gear on the corresponding lifting plate. The transmission ring corresponds to the lifting plate, with the end face of the transmission ring near the feed end meshing with the small gear on the corresponding lifting plate, and the other end face having a gap with the small gear on the adjacent lifting plate. The drive ring and transmission rings are connected by transmission columns, and a torsion spring is provided at the rotational connection between the guide plate and the drying cylinder.

[0007] Optionally, the transmission control mechanism includes a drive ring and several transmission rings. The drive ring and transmission rings are coaxially sleeved on the outside of the drying cylinder. Small gears are provided on the rotating shafts of the guide plate and the lifting plate. The drive ring corresponds to the guide plate, and the end face of the drive ring near the feed end meshes with the small gear on the guide plate. The end face of the drive ring near the discharge end has a gap with the small gear on the corresponding lifting plate. The transmission ring corresponds to the lifting plate, and the end face of the transmission ring near the feed end meshes with the small gear on the corresponding lifting plate. The other end face has a gap with the small gear on the adjacent lifting plate. In addition to the drive ring adjacent to the discharge end, the drive ring and the drive ring are provided with several circumferentially distributed drive columns on their sides near the discharge end. The end face of the drive ring near the feed end is provided with several mounting grooves. The drive columns are inserted into the mounting grooves and can slide circumferentially relative to the mounting grooves. Elastic elements are provided between the drive columns and the corresponding mounting grooves. The drive ring adjacent to the discharge end is fixed relative to the drying cylinder, while the drive ring and the other drive rings can rotate relative to the drying cylinder.

[0008] Optionally, a first sliding groove and a second sliding groove are provided on the side of the lifting plate near the inner wall of the drying cylinder. The first sliding groove is located on the end face of the lifting plate near the inner wall of the drying cylinder, and the second sliding groove is located on one side of the lifting plate and perpendicularly penetrates the first sliding groove. Both the first and second sliding grooves extend along the length of the lifting plate. A first sliding column is slidably arranged in the first sliding groove, and the first sliding column is the pivot of the lifting plate. A second sliding column is slidably arranged in the second sliding groove, and a locking nut is provided on the second sliding column. The locking nut is located on the outside of the lifting plate and is threadedly engaged with the second sliding column.

[0009] Optionally, the magnesium oxide production and drying device further includes a drive mechanism, which includes a drive motor. The output end of the drive motor is connected to a drive gear. An outer cylinder is coaxially arranged on the outside of the drying cylinder and is fixed relative to the drying cylinder. A gear ring is provided on the outer peripheral wall of the outer cylinder, and the drive gear meshes with the gear ring.

[0010] Optionally, the outer cylinder and the drying cylinder can be detachably connected.

[0011] Optionally, the magnesium oxide production and drying apparatus further includes a support mechanism, with at least two support mechanisms spaced apart along the axial direction of the outer cylinder, configured to support the outer cylinder.

[0012] Optionally, the magnesium oxide production and drying apparatus further includes a heating mechanism configured to provide a heat source for the drying cylinder.

[0013] Optionally, the magnesium oxide production and drying apparatus further includes a feeding mechanism and a discharging mechanism. The feeding mechanism is located at the inlet end and is used to feed material into the drying cylinder, while the discharging mechanism is located at the outlet end and is used to discharge material.

[0014] A magnesium oxide production and preparation system includes the magnesium oxide production and preparation drying device.

[0015] The beneficial effects of this invention are as follows: The magnesium oxide production and drying apparatus of this invention is equipped with lifting plates and guide plates. Both the lifting plates and guide plates are rotatably mounted on the drying cylinder, with their rotation centers offset to both sides. During drying, some guide plates sway under the gravity of the material, and under the action of the transmission control mechanism, all guide plates sway synchronously. The transmission control mechanism transmits the sway of the guide plates to the lifting plates, thereby causing the lifting plates to sway. If material accumulates at the feed end and there is little material inside the drying cylinder, the lifting plates are less affected by the material, and the lifting plates mainly sway under the influence of the guide plates. The more material accumulates, the greater the deflection angle of the guide plate and the lifting plate, which can quickly guide the material into the drying cylinder and prevent material accumulation at the feed end. If the material inside the drying cylinder increases, the lifting plate will tend to rotate in the opposite direction to the guide plate under the action of gravity of the material, thus resisting the guide plate and reducing the deflection angle of the guide plate. The angle of the lifting plate will decrease accordingly, reducing the speed of material feeding into the drying cylinder. In this way, the feeding speed can be adaptively adjusted according to the material at the feed end and the material inside the drying cylinder, effectively solving the problem of material accumulation at the feed end.

[0016] Furthermore, the drive ring and transmission ring of the transmission control mechanism are equipped with elastic elements at the connection point. During the drying process, the guide plate drives the lifting plates to swing, and the swing angle of each set of lifting plates gradually decreases from the feed end to the discharge end along the axial direction of the drying cylinder. While adjusting the conveying speed, it prevents the material entering the drying cylinder from being transported to the discharge end too quickly, resulting in more thorough drying and better drying effect.

[0017] Furthermore, the swing center of the swivel plate can be adjusted. By adjusting the swing center of the swivel plate, the amplitude of the swivel plate following the swing of the guide plate can be adjusted to adapt to different working conditions. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of a magnesium oxide production and drying device according to the present invention; Figure 2 for Figure 1 The front view; Figure 3 for Figure 2 Sectional view of AA; Figure 4 for Figure 2 BB section view; Figure 5 for Figure 4 Enlarged view of section I in the middle; Figure 6 This is a schematic diagram of the drying apparatus for the production and preparation of magnesium oxide according to the present invention, with the outer cylinder hidden. Figure 7 This is a schematic diagram of the transmission ring structure in this invention; Figure 8 This is a schematic diagram of the structure of the guide plate and the copying plate in this invention; Figure 9 This is a schematic diagram showing the state where there is no material being fed into the drying cylinder of the present invention; Figure 10 This is a schematic diagram showing the feeding state inside the drying cylinder of the present invention.

[0020] In the picture: 110. Outer cylinder; 120. Ring gear; 210. Drying cylinder; 220. Guide plate; 230. Lifting plate; 232. First sliding column; 233. Second sliding column; 234. Locking nut; 235. First sliding groove; 236. Second sliding groove; 240. Transmission ring; 241. Mounting groove; 250. Transmission column; 260. Elastic element; 270. Pinion; 280. Drive ring. 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] like Figures 1 to 10As shown in the figure, an embodiment of the present invention provides a drying device for the production and preparation of magnesium oxide, used to dry magnesium oxide during the preparation process. It includes a drying cylinder 210, several guide plates 220, lifting plates 230, and a transmission control mechanism. The drying cylinder 210 is rotatable around its own axis, with one end being the feed end and the other end being the discharge end. Several guide plates 220 are located at the feed end of the drying cylinder 210 and are evenly distributed along the circumference. The guide plates 220 are rotatably mounted on the inner wall of the drying cylinder 210, with their rotation axes perpendicular to the axis of the drying cylinder 210 and biased towards the side of the guide plate 220 closer to the feed end. The guide plates 220 are configured to swing and reset within a preset angle range, and the swing direction guides the material towards the discharge end. The lifting plates 230 are located on the side of the guide plates 220 away from the feed end. There are multiple sets of lifting plates 230, with multiple plates in each set. Multiple lifting plates 230 are evenly distributed along the circumference of the drying cylinder 210. Adjacent sets of lifting plates 230 are spaced apart along the axial direction of the drying cylinder 210. The lifting plates 230 are rotatably mounted on the inner wall of the drying cylinder 210. The axis of rotation of the lifting plates 230 is perpendicular to the axis of the drying cylinder 210 and biased towards the side of the lifting plate 230 closer to the discharge end. The lifting plates 230 are configured to be able to swing and reset within a preset angle range, and the swing direction enables them to guide the material towards the discharge end. The transmission control mechanism drives the guide plate 220 and the lifting plates 230, and is configured to enable all guide plates 220 to swing synchronously and drive the lifting plates 230 to swing in the same direction when the guide plates 220 swing.

[0023] In one embodiment, the transmission control mechanism includes a drive ring 280 and several transmission rings 240. The drive ring 280 and transmission rings 240 are coaxially rotatably sleeved on the outside of the drying cylinder 210. A pinion 270 is provided on the rotating shaft of both the guide plate 220 and the lifting plate 230. The drive ring 280 corresponds to the guide plate 220. The end face of the drive ring 280 near the feed end meshes with the pinion 270 on the guide plate 220, and the end face of the drive ring 280 near the discharge end meshes with the pinion 270 on the corresponding lifting plate 230. There is a gap; the transmission ring 240 corresponds to the lifting plate 230, and the end face of the transmission ring 240 near the feed end meshes with the pinion 270 on the corresponding lifting plate 230, while the other end face has a gap with the pinion 270 on the adjacent lifting plate 230; the drive ring 280 and the transmission ring 240, as well as the two adjacent transmission rings 240, are connected by a transmission column 250, thereby enabling step-by-step transmission; a torsion spring is provided at the rotational connection between the guide plate 220 and the drying cylinder 210 to facilitate the guide plate 220 to maintain its initial position and reset.

[0024] Reference Figure 9 , Figure 9The image shows the initial state of the lifting plate 230 parallel to the axis of the drying cylinder 210, with no material inside the drying cylinder 210. It is understandable that, in order to avoid incomplete material discharge due to the lifting plate 230 being too small after the equipment stops, and to prevent residual material inside the drying cylinder 210, the lifting plate 230 can be initially set to a certain tilt angle. This tilt angle is the minimum tilt angle, for example, it can be set to 1 degree.

[0025] In use, the material to be dried enters the drying cylinder 210 from the feed end. After the material enters the drying cylinder 210, as the drying cylinder 210 rotates, some of the guide plates 220 pick up the material and rotate under the action of gravity, which in turn drives the drive ring 280 to rotate. The drive ring 280 drives all the guide plates 220 to deflect synchronously, conveying the material into the drying cylinder 210. At the same time, the drive ring 280 drives the transmission ring 240 to rotate through the transmission column 250, which in turn causes the lifting plate 230 to deflect, continuously conveying the material to the discharge end. During the drying process, if material accumulates at the feed end and the material content inside the drying cylinder 210 is relatively low, the lifting plates 230 are less affected by the material. The deflection angle of the lifting plates 230 is mainly determined by the guide plate 220. The more material accumulates, the greater the deflection angle of the guide plate 220, and the greater the deflection angle of the lifting plates 230 driven by the guide plate 220. This allows for rapid material transport into the drying cylinder 210, preventing material accumulation at the feed end. As the material content inside the drying cylinder 210 increases, the lifting plates 230, under the influence of gravity, lift the material. The guide plate 220 tends to rotate in the opposite direction to the guide plate 220, which in turn causes the transmission ring 240 to rotate in the opposite direction to the drive ring 280. The deflection angle of the guide plate 220 decreases, and correspondingly, the deflection angle of the lifting plate 230 also decreases. The difference in material quantity between the material inside the drying cylinder 210 and the material at the feed end is not significant, thus reducing the feeding speed into the drying cylinder 210 and ensuring that the material is fully dried inside the drying cylinder 210. In this way, the feeding speed can be adaptively adjusted according to the material at the feed end and the material condition inside the drying cylinder 210, effectively solving the problem of material accumulation at the feed end.

[0026] It should be added that, to facilitate the rotation of the drying cylinder 210, the present invention also includes a drive mechanism, which includes a drive motor (not shown in the figure). The output end of the drive motor is connected to a drive gear. An outer cylinder 110 is coaxially arranged on the outer side of the drying cylinder 210, and the outer cylinder 110 is fixed relative to the drying cylinder 210. A gear ring 120 is provided on the outer peripheral wall of the outer cylinder 110. The drive gear meshes with the gear ring 120 to drive the outer cylinder 110 to rotate, thereby driving the drying cylinder 210 to rotate. For ease of assembly, the outer cylinder 110 and the drying cylinder 210 are detachably connected, specifically by using bolts and nuts for fastening. An installation cavity is provided between the outer cylinder 110 and the drying cylinder 210, and the drive ring 280, transmission ring 240, and pinion 270 are located in the installation cavity.

[0027] In another preferred embodiment of the present invention, the transmission control mechanism includes a drive ring 280 and several transmission rings 240. The drive ring 280 and the transmission rings 240 are coaxially sleeved on the outside of the drying cylinder 210. A pinion 270 is provided on the rotating shaft of the guide plate 220 and the lifting plate 230. The drive ring 280 corresponds to the guide plate 220. The end face of the drive ring 280 near the feed end meshes with the pinion 270 on the guide plate 220, and the end face of the drive ring 280 near the discharge end has a gap with the pinion 270 on the corresponding lifting plate 230. The transmission rings 240 correspond to the lifting plates 230, and the end face of the transmission ring 240 near the feed end meshes with the pinion 270 on the corresponding lifting plate 230, while the other end face has a gap with the pinion 270 on the adjacent lifting plate 230. In addition to the transmission ring 240 adjacent to the discharge end, the drive ring 280 and the transmission ring 240 near the discharge end are provided with several circumferentially distributed transmission columns 250. The end face of the transmission ring 240 near the feed end is provided with several mounting grooves 241. The transmission columns 250 are inserted into the mounting grooves 241 and can slide circumferentially relative to the mounting grooves 241. An elastic element 260, preferably a spring, is provided between the transmission column 250 and the corresponding mounting groove 241. The transmission ring 240 adjacent to the discharge end is fixed relative to the drying cylinder 210, and the drive ring 280 and the other transmission rings 240 can rotate relative to the drying cylinder 210. In the preferred embodiment of the present invention, elastic elements 260 are provided between the two sides of the transmission column 250 and the two circumferential end faces of the corresponding mounting grooves 241. In other embodiments, it is also feasible to provide an elastic element 260 between one side of the transmission column 250 and the mounting groove 241.

[0028] In use, the material to be dried enters the drying cylinder 210 from the feed end. After the material enters the drying cylinder 210, as the outer cylinder 110 and the drying cylinder 210 rotate, some of the guide plates 220 pick up the material and rotate under the action of gravity, which in turn drives the drive ring 280 to rotate. The drive ring 280 drives all the guide plates 220 to deflect synchronously, conveying the material into the drying cylinder 210. At the same time, the drive ring 280 compresses the elastic element 260 through the transmission column 250, which in turn drives the transmission ring 240 to rotate, which in turn causes the lifting plate 230 to deflect, continuously conveying the material to the discharge end. During the material conveying process, the guide plate 220 and the lifting plate 230 work together to adaptively adjust the feeding speed according to the material at the feeding end and the material inside the drying cylinder 210. At the same time, due to the action of the elastic element 260, the deflection angle of each set of lifting plates 230 gradually decreases from the feeding end to the discharge end. The lifting plate 230 adjacent to the discharge end does not deflect, so the material entering the drying cylinder 210 will not be conveyed to the discharge end too quickly, resulting in more thorough drying and better drying effect.

[0029] Based on the above embodiments, it is also necessary to add that, in order to ensure that the swing angle and swing direction of the lifting plate 230 and the guide plate 220 meet the requirements, a limiting plate can be set on the rotating shaft of the lifting plate 230 and the guide plate 220, and a limiting groove can be set at the rotating hole of the lifting plate 230 and the guide plate 220 on the drying cylinder 210. The limiting groove covers a certain angle range, and the limiting plate is rotatably set in the limiting groove, thereby achieving the above purpose.

[0030] In a further embodiment, refer to Figure 8 The lifting plate 230 is provided with a first sliding groove 235 and a second sliding groove 236 on the side near the inner wall of the drying cylinder 210. The first sliding groove 235 is provided on the end face of the lifting plate 230 near the inner wall of the drying cylinder 210, and the second sliding groove 236 is provided on one side of the lifting plate 230 and perpendicularly penetrates the first sliding groove 235. Both the first sliding groove 235 and the second sliding groove 236 extend along the length direction of the lifting plate 230. A first sliding post 232 is slidably provided in the first sliding groove 235. The first sliding post 232 is the rotating shaft of the lifting plate 230, and a corresponding pinion 270 is provided on the first sliding post 232. A second sliding post 233 is slidably provided in the second sliding groove 236. A locking nut 234 is provided on the second sliding post 233. The locking nut 234 is located on the outside of the lifting plate 230 and is threadedly engaged with the second sliding post 233, thereby locking the position of the first sliding post 232 in the first sliding groove 235. By adjusting the position of the first sliding column 232 within the first chute 235, the swing center of the lifting plate 230 can be adjusted, thereby adjusting the amplitude of the swing of the lifting plate 230 following the swing of the guide plate 220 to adapt to different working conditions. For example, in situations where the drying effect requirement is low (preliminary dehumidification) but the efficiency requirement is high, the feeding speed is relatively fast, and material accumulation is likely to occur at the feeding end. In this case, the first sliding column 232 can be adjusted closer to the center of the lifting plate 230. The lifting plate 230 is less likely to swing under the action of the material, thus the force against the guide plate 220 is smaller, and the angle of swing of the lifting plate 230 driven by the guide plate 220 is larger, which can quickly convey the material to the discharge port. In situations where the drying effect requirement is high, the first sliding column 232 can be adjusted further away from the center of the lifting plate 230. The swing arm of the lifting plate 230 increases, making it easier to swing under the action of the material, thus the force against the guide plate 220 is larger, and the angle of swing of the lifting plate 230 driven by the guide plate 220 is correspondingly reduced, reducing the material conveying speed and ensuring drying efficiency.

[0031] In a further embodiment, the magnesium oxide production and drying apparatus of the present invention further includes a support mechanism (not shown in the figure). At least two support mechanisms are provided at intervals along the axial direction of the outer cylinder 110. The support mechanisms are configured to support the outer cylinder 110 and are configured as bearing supports.

[0032] In a further embodiment, the magnesium oxide production and drying apparatus of the present invention further includes a heating mechanism, which is configured to provide a heat source for the drying cylinder 210. The heating mechanism can be a hot air blower or a thermal resistor, etc.

[0033] In a further embodiment, the magnesium oxide production and drying apparatus of the present invention further includes a feeding mechanism and a discharging mechanism. The feeding mechanism is located at the inlet end for feeding material into the drying cylinder 210, and the discharging mechanism is located at the outlet end for discharging the dried material.

[0034] This invention also provides a magnesium oxide production and preparation system. The system carries out magnesium oxide production according to the process of raw material preparation, crushing, screening, shaping, magnetic separation, dehumidification, modification, recovery, drying, packaging and warehousing. Specifically, it includes feeding equipment, crushing device, screening device, shaping device, magnetic separation device, dehumidification device, modification device, drying equipment and packaging equipment, wherein the drying device adopts the aforementioned magnesium oxide production and preparation drying device.

[0035] The mined magnesite is pre-treated through processes such as light calcination and then stored as reserve raw material. During production, the reserve raw material is transported to a crushing unit via a feeding device for crushing. The crushing unit can be a jaw crusher or similar type of stone crusher. After crushing, the raw material is screened to obtain particles with the required particle size. Then, it is shaped by a shaping device, which can be a spherical shaper. This spherical shape improves the flowability of the particles, thereby increasing the packing density of the finished magnesium oxide product and improving its pressure resistance. After shaping, ferromagnetic substances are removed by a magnetic separation device.

[0036] Magnesium oxide after magnetic separation undergoes high-temperature heat treatment under nitrogen protection in a dehumidification device to remove organic impurities and water of crystallization, yielding heat-treated magnesium oxide granules. Subsequently, the magnesium oxide is modified in a modification device, which can be a mixing apparatus. During modification, a passivating agent and an ammonium salt are thoroughly mixed at a weight ratio of 9:0.3:0.6 (wt%) to obtain a mixture. The passivating agent comprises the following components by weight: 8% nitric acid + 1% potassium dichromate + 91% water, and the ammonium salt is ammonium chloride. The modified mixture is placed in an inert gas-protected high-temperature furnace and subjected to a high-temperature reduction treatment at 1500–1600 degrees Celsius for approximately 3.5 hours. After being removed from the furnace and cooled to room temperature, it is then dried and packaged for storage.

[0037] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A drying apparatus for the production and preparation of magnesium oxide, characterized in that, include: The drying cylinder is capable of rotating around its own axis. One end of the drying cylinder is the feed end, and the other end is the discharge end. Several guide plates are located at the feed end of the drying cylinder and are evenly distributed along the circumference. The guide plates are rotatably mounted on the inner wall of the drying cylinder. The rotation axis of the guide plates is perpendicular to the axis of the drying cylinder and biased towards the side of the guide plates closer to the feed end. The guide plates are configured to be able to swing and reset within a preset angle range, and the swing direction enables them to guide the material towards the discharge end. The lifting plates are located on the side of the guide plate away from the feed end. There are multiple sets of lifting plates, with multiple lifting plates in each set. Multiple lifting plates in the same set are evenly distributed along the circumference of the drying cylinder. Adjacent sets of lifting plates are spaced apart along the axial direction of the drying cylinder. The lifting plates are rotatably mounted on the inner wall of the drying cylinder. The rotation axis of the lifting plates is perpendicular to the axis of the drying cylinder and biased towards the side of the lifting plates closer to the discharge end. The lifting plates are configured to be able to swing and reset within a preset angle range, and the swing direction enables them to guide the material towards the discharge end. The transmission control mechanism is connected to the guide plate and the lifting plate, and is configured to make all the guide plates swing synchronously and drive the lifting plate to swing in the same direction when the guide plates swing. The transmission control mechanism includes a drive ring and several transmission rings. The drive ring and transmission rings are coaxially rotatably sleeved on the outside of the drying cylinder. Small gears are provided on the rotating shafts of the guide plate and the lifting plate. The drive ring corresponds to the guide plate, with its end face near the feed end meshing with the small gear on the guide plate, and its end face near the discharge end having a gap with the small gear on the corresponding lifting plate. The transmission ring corresponds to the lifting plate, with its end face near the feed end meshing with the small gear on the corresponding lifting plate, and its other end face having a gap with the small gear on the adjacent lifting plate. The drive ring and transmission rings, as well as adjacent transmission rings, are connected by transmission columns. A torsion spring is provided at the rotational connection between the guide plate and the drying cylinder.

2. The drying apparatus for producing magnesium oxide according to claim 1, characterized in that, The lifting plate is provided with a first sliding groove and a second sliding groove on the side near the inner wall of the drying cylinder. The first sliding groove is located on the end face of the lifting plate near the inner wall of the drying cylinder, and the second sliding groove is located on one side of the lifting plate and perpendicularly penetrates the first sliding groove. Both the first and second sliding grooves extend along the length of the lifting plate. A first sliding column is slidably arranged in the first sliding groove, and the first sliding column is the pivot of the lifting plate. A second sliding column is slidably arranged in the second sliding groove, and a locking nut is provided on the second sliding column. The locking nut is located on the outside of the lifting plate and is threadedly engaged with the second sliding column.

3. The drying apparatus for producing magnesium oxide according to claim 1, characterized in that, The magnesium oxide production and drying device also includes a drive mechanism, which includes a drive motor. The output end of the drive motor is connected to a drive gear. An outer cylinder is coaxially arranged on the outside of the drying cylinder and is fixed relative to the drying cylinder. A gear ring is provided on the outer peripheral wall of the outer cylinder, and the drive gear meshes with the gear ring.

4. The drying apparatus for producing magnesium oxide according to claim 3, characterized in that, The outer cylinder and the drying cylinder are detachably connected.

5. The drying apparatus for producing magnesium oxide according to claim 1, characterized in that, The magnesium oxide production and drying apparatus also includes a support mechanism, with at least two support mechanisms spaced apart along the axial direction of the outer cylinder, configured to support the outer cylinder.

6. The drying apparatus for producing magnesium oxide according to claim 1, characterized in that, The magnesium oxide production and drying apparatus also includes a heating mechanism, which is configured to provide a heat source for the drying cylinder.

7. The drying apparatus for producing magnesium oxide according to claim 1, characterized in that, The magnesium oxide production and drying device also includes a feeding mechanism and a discharging mechanism. The feeding mechanism is located at the inlet end and is used to feed materials into the drying cylinder, while the discharging mechanism is located at the outlet end and is used to discharge materials.

8. A magnesium oxide production and preparation system, characterized in that, The drying apparatus for the production and preparation of magnesium oxide as described in any one of claims 1-7.

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