A method for rapid drying of a solid ceramic body

Abstract

The present application relates to a kind of methods for the rapid drying of solid ceramic body, the solid ceramic body is placed into microwave blast drying device and is dried, including following three stages: the first stage is low temperature, low microwave, high humidity stage: temperature is 40-60 ℃, microwave power is 20-30% of total power, humidity is 70%RH-80%RH;Second stage is low temperature, medium humidity, microwave stage: temperature is 40-60 ℃, humidity is 40%RH-60%RH, microwave power is promoted to 50-70% of total power;Third stage is low microwave, low humidity, temperature stage: temperature rises to 80-100 ℃, humidity is 10%RH-30%RH, microwave power is 20-30% of total power.The present application realizes the rapid drying of solid ceramic body by the drying mode of three stages, simultaneously reduces the risk that body appears drying crack, improves production efficiency and product qualification rate.

Description

Technical Field

[0001] This invention belongs to the field of ceramic body drying technology, and more specifically, relates to a method for rapid drying of solid ceramic bodies. Background Technology

[0002] Drying ceramic blanks is a crucial and challenging step in ceramic manufacturing. The core challenge lies in achieving uniform and efficient dehumidification both inside and outside the blank, while avoiding defects such as cracking and deformation caused by excessive drying stress, especially for large-volume ceramic blanks. Currently, the mainstream technology in this field is still convection hot air drying. Its principle is to transfer heat from the surface of the blank to its interior through convection heat transfer using heated air, while moisture migrates from the interior to the surface and evaporates into the flowing air. However, this traditional surface-to-interior heating method has inherent limitations. For large-volume blanks, it easily creates huge temperature and humidity gradients, causing surface moisture to evaporate and shrink rapidly, while internal moisture migration lags behind. This generates significant drying stress within the blank, leading to cracking. Therefore, production often requires extremely slow heating and holding processes, resulting in drying cycles that can last for tens or even hundreds of hours, consuming huge amounts of energy and requiring a large area.

[0003] To overcome these problems, bulk heating technologies such as microwave drying and radio frequency drying have been widely studied as highly promising alternatives. Their energy can directly act on water molecules inside the billet, achieving synchronous heating of the entire billet and forming a vapor pressure gradient from the inside out as a powerful driving force for moisture migration. Theoretically, this can significantly shorten drying time and improve uniformity. However, in practical industrial applications, especially for large-volume billets, these technologies face severe challenges such as hot spot control, uneven field strength distribution, and difficulty in process monitoring. If the parameters are not properly controlled, the excessively rapid increase in internal vapor pressure can directly lead to the expansion and cracking of the billet, which in turn exacerbates the risk of defects.

[0004] Therefore, a method is needed to achieve rapid and high-quality drying. Summary of the Invention

[0005] The main objective of this invention is to overcome the deficiencies in the prior art and provide a method for rapid drying of solid ceramic blanks.

[0006] To achieve the above objectives, the specific technical solution is as follows:

[0007] The first objective of this invention is to provide a method for rapidly drying a solid ceramic body, wherein the solid ceramic body is placed in a microwave forced-air drying device for drying, comprising the following three stages:

[0008] The first stage is the medium-low temperature, low microwave, and high humidity stage: the ambient temperature is 40-60℃, the wave power is 20-30% of the total power, and the ambient humidity is 70%RH-80%RH.

[0009] The second stage is the medium-low temperature, medium humidity, microwave power increase stage: the ambient temperature is 40-60℃, the ambient humidity is 40%RH-60%RH, and the microwave power is increased to 50-70% of the total power;

[0010] The third stage is a low-microwave, low-humidity, and temperature-raising stage: the ambient temperature rises to 80-100℃, the ambient humidity is 10%RH-30%RH, and the microwave power is 20-30% of the total power;

[0011] The microwave drying device includes a microwave drying chamber, a blower, and a steam generator; the blower is connected to the microwave drying chamber through a duct to regulate the internal temperature of the microwave drying chamber; the steam generator is located inside the microwave drying chamber to regulate the internal humidity of the microwave drying chamber.

[0012] This invention is a composite drying mode for ceramic blanks. It utilizes the overall drying characteristics of microwave drying, combined with forced-air drying and humidity control processes. Through a three-stage drying method, it achieves rapid drying of solid ceramic blanks, while reducing the risk of drying cracks in the blanks and improving production efficiency and product qualification rate. The first stage uses low-power microwave operation to slowly heat the internal moisture, creating a gradient vapor pressure from the inside out. Simultaneously, the external environment is kept at high humidity to suppress surface evaporation and promote moisture migration within the solid ceramic body, preventing drying shrinkage cracks. The ambient temperature is controlled at 40-60℃ to avoid moisture condensation. The second stage increases microwave power while decreasing ambient humidity, maintaining the ambient temperature at 40-60℃. This stage is for accelerated drying. By adjusting microwave power and ambient temperature and humidity, moisture in the solid ceramic body is encouraged to dissipate into the space, achieving a dynamic balance between the internal moisture diffusion rate and the surface evaporation rate, reducing the risk of drying cracks. The third stage decreases microwave power while reducing ambient humidity and increasing the ambient temperature to 80-100℃ to accelerate moisture evaporation and complete the drying of the solid ceramic body. In this stage, the moisture in the body mainly comes from adsorbed or bound water, and slow drying occurs in a low-humidity, high-temperature environment.

[0013] The microwave drying device used in this invention can be selected with appropriate size and power according to the characteristics of the solid ceramic blank sample before drying (such as size, mass, moisture content, etc.).

[0014] Furthermore, the solid ceramic blank is a square ceramic blank.

[0015] Furthermore, the volume of the solid ceramic blank is 25,000-75,000 cm³. 3 .

[0016] The method for rapid drying of solid ceramic blanks provided by this invention can also achieve rapid drying and crack prevention of large-volume ceramic blanks, thereby improving production efficiency and product qualification rate.

[0017] Furthermore, the total power is 200-300kW.

[0018] Furthermore, a pulse operation mode is used to adjust the microwave output to avoid overheating and reduce the risk of cracking.

[0019] Furthermore, the drying time for the first stage is 8-24 hours.

[0020] Furthermore, the drying time for the second stage is 36-60 hours.

[0021] Furthermore, the drying time for the third stage is 60-120 hours.

[0022] Furthermore, the microwave power increase rate in the second stage is to increase to a specified power value within 5 hours; the specified power is 100-210kW; the humidity decrease rate in the second stage is to decrease to a specified humidity range within 8 hours, the specified humidity range is 40%RH-60%RH.

[0023] Furthermore, the rate of temperature increase in the third stage is to raise the temperature to a specified temperature value within 24 hours, wherein the specified temperature is 80-100℃; the rate of humidity decrease in the third stage is to decrease the humidity to a specified humidity range within 8 hours, wherein the specified humidity is 10%RH-30%RH.

[0024] Furthermore, the microwave drying oven is equipped with temperature and humidity sensors to monitor the internal temperature and humidity of the device in real time, facilitating process adjustments.

[0025] Furthermore, the microwave power, temperature, and humidity parameters of the microwave drying device are synchronously connected to the control system and can be displayed on the panel to collect and store data.

[0026] In one specific embodiment of the present invention, the method for rapid drying of the solid ceramic body includes the following steps:

[0027] The volume of the solid ceramic blank is 25000-2800 cm³. 3 Solid ceramic blanks with a moisture content of 17-20% are placed in a microwave drying apparatus. Microwave drying is combined with forced-air heat exchange and humidification by a steam generator. The temperature and humidity parameters inside the microwave drying apparatus are monitored in real time.

[0028] The first stage is a medium-low temperature, low microwave, and high humidity stage: the temperature is 45-55℃, the microwave power is 45-55kW, the humidity is 70%RH-80%RH, and the drying time in the first stage is 8-14h, which promotes the migration of moisture inside the solid ceramic body.

[0029] The second stage is a medium-low temperature, medium humidity, and microwave stage: the temperature is 45-55℃, the internal humidity is reduced to 40%RH-50%RH within 8 hours, the microwave power is increased to 110-125kW within 5 hours, and the drying time of the second stage is 36-48 hours, which promotes the dissipation of moisture in the solid ceramic body into the space and reduces the risk of drying cracks.

[0030] The third stage is a low-microwave, low-humidity, and temperature-raising stage: the temperature is raised to 80-95℃ within 24 hours; the internal humidity is reduced to 10%RH-20%RH within 8 hours; the microwave power is 40-50kW to accelerate moisture evaporation; the drying time in the third stage is 60-72 hours; finally, the microwave and blower are turned off, and the drying is completed after cooling to room temperature.

[0031] In one specific embodiment of the present invention, the method for rapid drying of the solid ceramic body includes the following steps:

[0032] The volume is 53,000-54,000 cm³ 3 Solid ceramic blanks with a moisture content of 17-20% are placed in a microwave drying apparatus. Microwave drying is combined with forced-air heat exchange and humidification by a steam generator. The temperature and humidity parameters inside the microwave drying apparatus are monitored in real time.

[0033] The first stage is a medium-low temperature, low microwave, and high humidity stage: the temperature is 45-55℃, the microwave power is 50-60kW, the humidity is 70%RH-80%RH, and the drying time in the first stage is 12-18h, which promotes the migration of moisture inside the solid ceramic body.

[0034] The second stage is the medium-low temperature, medium humidity, and microwave stage: the temperature is 45-55℃, the internal humidity is reduced to 40%RH-50%RH within 8 hours, the microwave power is increased to 120-130kW within 5 hours, and the drying time of the second stage is 45-55 hours, which promotes the dissipation of moisture in the solid ceramic body into the space and reduces the risk of drying cracks.

[0035] The third stage is a low-microwave, low-humidity, and temperature-raising stage: the temperature is raised to 85-100℃ within 24 hours; the humidity of the internal space is reduced to 10%RH-20%RH within 8 hours; the microwave power is 45-55kW to accelerate moisture evaporation; the drying time of the third stage is 80-110 hours; finally, the microwave and blower are turned off, and the drying is completed after cooling to room temperature.

[0036] In one specific embodiment of the present invention, the method for rapid drying of the solid ceramic body includes the following steps:

[0037] The volume is 68,000-69,000 cm³ 3 Solid ceramic blanks with a moisture content of 18-20% are placed in a microwave drying apparatus. Microwave drying is combined with forced-air heat exchange and humidification by a steam generator. The temperature and humidity parameters inside the microwave drying apparatus are monitored in real time.

[0038] The first stage is a medium-low temperature, low microwave, and high humidity stage: the temperature is 45-55℃, the microwave power is 55-65kW, the humidity is 70%RH-80%RH, and the drying time in the first stage is 18-26h, which promotes the migration of moisture inside the solid ceramic body.

[0039] The second stage is the medium-low temperature, medium humidity, and microwave stage: the temperature is 45-55℃, the internal humidity is reduced to 40%RH-60%RH within 8 hours, the microwave power is increased to 120-140kW within 5 hours, and the drying time of the second stage is 45-60 hours, which promotes the dissipation of moisture in the solid ceramic body into the space and reduces the risk of drying cracks.

[0040] The third stage is a low-microwave, low-humidity, and temperature-raising stage: the temperature is raised to 85-100℃ within 24 hours; the humidity of the internal space is reduced to 10%RH-30%RH within 8 hours; the microwave power is 48-60kW to accelerate moisture evaporation; the drying time of the third stage is 100-125 hours; finally, the microwave and blower are turned off, and the drying is completed after cooling to room temperature.

[0041] Compared with the prior art, the present invention has the following significant advantages:

[0042] This invention provides a method for rapid drying of solid ceramic blanks. It adopts a combined drying strategy, combining microwave drying with hot air convection. It utilizes volume heating to provide internal power, while using convective hot air to control the surface state, optimizing the overall heat-mass transfer process. It precisely and coordinately controls the heat flow and mass flow inside and outside the blank in stages to match its dynamically changing drying kinetics, thereby achieving a rapid and high-quality drying process for solid ceramic blanks, especially large-volume solid ceramic blanks.

[0043] This invention enables uniform and efficient dehumidification of solid ceramic blanks, especially large-volume solid ceramic blanks, both inside and out, avoiding defects such as cracking and deformation caused by excessive drying stress, improving production efficiency and product qualification rate, and greatly shortening the drying cycle. Attached Figure Description

[0044] To more clearly illustrate the technical solutions in this 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 some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0045] Figure 1 These are comparison images of solid ceramic blanks before and after drying in Embodiment 1 of the present invention;

[0046] Figure 2 This is a comparison image of solid ceramic blanks before and after drying in Embodiment 2 of the present invention. Detailed Implementation

[0047] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0048] The microwave drying device used in this embodiment of the invention includes a microwave drying chamber, a blower, and a steam generator. The blower is connected to the microwave drying chamber via a duct to regulate the internal temperature. The steam generator is located inside the microwave drying chamber to regulate the internal humidity. The microwave drying chamber is equipped with temperature and humidity sensors to monitor the internal temperature and humidity in real time, facilitating process adjustments. The microwave power, temperature, and humidity parameters of the microwave drying device are synchronously connected to the control system, displayed on a control panel, and the data is collected and stored.

[0049] Example 1: The total power of the microwave drying device is 200kW; Example 2: The total power of the microwave drying device is 200kW; Example 3: The total power of the microwave drying device is 200kW.

[0050] Example 1

[0051] A method for rapid drying of solid ceramic bodies includes the following steps:

[0052] (1) Sample characterization before drying: Data on appearance, size, and mass of the sample to be dried were collected. The sample to be dried was a solid rectangular ceramic body with a diameter of 580mm*580mm*80mm and a mass of 107.4 kg. The moisture content of the clay body was 19%.

[0053] (2) Control of drying process parameters: The solid ceramic blank is placed in the microwave drying device. Microwave drying is combined with air heat exchange and steam generator humidity adjustment. The temperature and humidity parameters in the microwave drying device are monitored in real time.

[0054] The first stage is a medium-low temperature, low microwave, and high humidity stage. The temperature is 50℃, the microwave power is 50kW, and the humidity is 80%RH. The drying time of the first stage is 12h, which promotes the migration of moisture inside the solid ceramic body.

[0055] The second stage is a medium-low temperature, medium humidity, and microwave stage. The temperature is 50℃, the humidity is reduced from 80%RH to 40%RH at a rate of 5%RH / h, and the microwave power is increased from 50kW to 120kW at a rate of 14kW / h. The drying time in the second stage is 42h, which promotes the dissipation of moisture in the solid ceramic body into the space and reduces the risk of drying cracks.

[0056] The third stage is a low-microwave, low-humidity, and temperature-increasing stage. The temperature rises from 50℃ to 90℃ at a rate of 1.7℃ / h; the humidity decreases from 40%RH to 10%RH at a rate of 3.75%RH / h; the microwave power is 45kW to accelerate moisture evaporation. The drying time for the third stage is 70 hours. Finally, the microwave and blower are turned off, and the drying process ends after cooling to room temperature.

[0057] The parameters for the drying process are controlled as shown in Table 1:

[0058] Table 1. Parameter Control of Drying Process *

[0059]

[0060] *The rise and fall rates of the parameters in the table are average rates and are for reference only in actual operation.

[0061] (3) Characterization of dried sample: The size of dried sample is 532mm*535mm*78mm and the mass is 89.1 kg.

[0062] In this embodiment, after the solid ceramic body was dried, the moisture content of the body was 2%, and the drying time was 124 hours. Through observation, tapping, and ultrasonic testing, it was determined that the dried solid ceramic body had no cracks and no internal defects.

[0063] Example 2

[0064] A method for rapid drying of solid ceramic bodies includes the following steps:

[0065] (1) Sample characterization before drying: Data on appearance, size, and mass of the sample to be dried were collected. The sample to be dried was a solid rectangular ceramic body with a diameter of 730mm*730mm*100mm and a mass of 219.8 kg. The moisture content of the clay body was 20%.

[0066] (2) Control of drying process parameters: The solid ceramic blank is placed in the microwave drying device. Microwave drying is combined with air heat exchange and steam generator humidity adjustment. The temperature and humidity parameters in the microwave drying device are monitored in real time.

[0067] The first stage is a medium-low temperature, low microwave, and high humidity stage. The temperature is 45℃, the microwave power is 60kW, and the humidity is 80%RH. The drying time of the first stage is 16h, which promotes the migration of moisture inside the solid ceramic body.

[0068] The second stage is a medium-low temperature, medium humidity, and microwave stage. The temperature is 50℃, the humidity is reduced from 80%RH to 45%RH at a rate of 4.5%RH / h, and the microwave power is increased from 60kW to 125kW at a rate of 13kW / h. The drying time in the second stage is 50h, which promotes the dissipation of moisture in the solid ceramic body into the space and reduces the risk of drying cracks.

[0069] The third stage is a low-microwave, low-humidity, and temperature-increasing stage. The temperature rises from 50℃ to 100℃ at a rate of 2.1℃ / h; the humidity decreases from 45%RH to 15%RH at a rate of 3.75%RH / h; the microwave power is 50kW to accelerate moisture evaporation. The drying time for the third stage is 100h. Finally, the microwave and blower are turned off, and the drying process ends after cooling to room temperature.

[0070] The parameters for the drying process are controlled as shown in Table 2:

[0071] Table 2 Control of Drying Process Parameters *

[0072]

[0073] *The rise and fall rates of the parameters in the table are average rates and are for reference only in actual operation.

[0074] (4) Characterization of dried sample: The size of dried sample is 658mm*663mm*97mm and the mass is 182.4 kg.

[0075] In this embodiment, after the solid ceramic body was dried, the moisture content of the body was 3%, and the drying time was 166 hours. Through observation, tapping, and ultrasonic testing, it was determined that the dried solid ceramic body had no cracks and no internal defects.

[0076] Example 3

[0077] A method for rapid drying of solid ceramic bodies includes the following steps:

[0078] (1) Sample characterization before drying: Data on appearance, size, and mass of the sample to be dried were collected. The sample to be dried was a solid rectangular ceramic body of 830mm*830mm*100mm with a mass of 298.2 kg and a moisture content of 19%.

[0079] (2) Control of drying process parameters: The solid ceramic blank is placed in the microwave drying device. Microwave drying is combined with air heat exchange and steam generator humidity adjustment. The temperature and humidity parameters in the microwave drying device are monitored in real time.

[0080] The first stage is a medium-low temperature, low microwave, and high humidity stage. The temperature is 45℃, the microwave power is 60kW, and the humidity is 75%RH. The drying time of the first stage is 24h, which promotes the migration of moisture inside the solid ceramic body.

[0081] The second stage is a medium-low temperature, medium humidity, and microwave stage. The temperature is 50℃, the humidity is reduced from 75%RH to 45%RH at a rate of 3.75%RH / h, and the microwave power is increased from 60kW to 138kW at a rate of 16kW / h. The drying time in the second stage is 58h, which promotes the dissipation of moisture in the solid ceramic body into the space and reduces the risk of drying cracks.

[0082] The third stage is a low-microwave, low-humidity, and temperature-increasing stage. The temperature rises from 50℃ to 100℃ at a rate of 2.1℃ / h; the humidity decreases from 45%RH to 20%RH at a rate of 3.2%RH / h; the microwave power is 50kW to accelerate moisture evaporation. The drying time for the third stage is 120h. Finally, the microwave and blower are turned off, and the drying process ends after cooling to room temperature.

[0083] The parameters for the drying process are controlled as shown in Table 3:

[0084] Table 3. Parameter Control of Drying Process *

[0085]

[0086] *The rise and fall rates of the parameters in the table are average rates and are for reference only in actual operation.

[0087] (5) Characterization of dried sample: The size of dried sample is 738mm*741mm*95mm and the mass is 245.1 kg.

[0088] In this embodiment, after the solid ceramic body was dried, the moisture content of the body was 2%, and the drying time was 202 hours. Through observation, tapping, and ultrasonic testing, it was determined that the dried solid ceramic body had no cracks and no internal defects.

[0089] Comparative Example 1

[0090] This comparative example provides a method for drying a solid ceramic body, including the following steps:

[0091] (1) Sample characterization before drying: Data on appearance, size, and mass of the sample to be dried were collected. The sample to be dried was a solid cuboid with dimensions of 723mm*718mm*99mm and a mass of 217.8kg. The moisture content of the clay blank was 19%.

[0092] (2) Place the solid ceramic blanks vertically in the air-drying workshop, keeping a certain distance between the blanks (usually 5-10 cm) to ensure air circulation;

[0093] (3) Close most of the ventilation openings in the drying room to create a high-humidity, windless, and sunless environment. During this period, turn the blanks over regularly. This stage lasts for several days.

[0094] (4) After the surface of the billet has been shaped to a certain extent (not sticky to the touch, and has a certain hardness), gradually and slowly open the vents to increase air convection and speed up the drying process. When the moisture content of the billet drops to a low level (<10%) and the overall strength is high, ventilation can be further increased, and even moderate side drying can be carried out.

[0095] (5) When the moisture content of the blank drops to the process requirements (usually <5%), and after inspection, there are no cracks or deformations, it can be taken out of the room. After 180 days of air drying, the sample size is 668mm*652mm*98mm, the mass is 183.1kg, and the moisture content of the clay blank is 3%.

[0096] In this embodiment, after the solid ceramic body was dried, the moisture content of the body was 3%, and the drying time was 180 days. Through observation, tapping, and ultrasonic testing, it was determined that the dried solid ceramic body had no cracks and no internal defects.

[0097] Comparative Example 2

[0098] This comparative example provides a method for drying a solid ceramic body, including the following steps:

[0099] (1) Characterization of samples before drying: Data on appearance, size, and mass of the sample to be dried were collected. The sample to be dried was a solid cuboid with dimensions of 738mm*741mm*100mm and a mass of 241.2kg. The moisture content of the clay blank was 20%.

[0100] (2) Place the solid ceramic blanks vertically in the air-drying workshop, keeping a certain distance between the blanks (usually 5-10 cm) to ensure air circulation. At the stage when the blanks are most plastic and most sensitive to drying stress, remove most of the free water safely and evenly to complete the initial shaping. This stage lasts for 2-3 weeks.

[0101] (3) When the surface of the billet turns white, feels hard and not sticky, and the moisture content drops to near the critical moisture content (15%), slowly introduce hot air and control the ambient temperature to 35-40℃. The hot air should circulate around the billet at a low speed and in a uniform manner, avoiding direct blowing. This process should be maintained for 3-5 days, during which the billet should be turned over regularly.

[0102] (4) Strengthen hot air drying, raise the temperature to 55-75℃, and efficiently remove residual moisture, especially capillary water and some adsorbed water, to reduce the moisture content to the kiln entry requirements. This process is maintained for 5-7 days. After drying, measure the parameters of the blank. After this drying process, the size is 671mm*667mm*98mm, the weight is 198.3kg, and the moisture content of the clay blank is 2%.

[0103] In this embodiment, after the solid ceramic body was dried, the moisture content of the body was 2%, and the drying time was 31 days. Through observation, tapping, and ultrasonic testing, it was determined that the dried solid ceramic body had no cracks and no internal defects.

[0104] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A method for rapid drying of solid ceramic blanks, characterized in that, The volume of the solid ceramic blank is 25,000-75,000 cm³. 3 The solid ceramic blank is placed in a microwave drying device for drying, which includes the following three stages: The first stage is the medium-low temperature, low microwave, and high humidity stage: the ambient temperature is 40-60℃, the microwave power is 20-30% of the total power, and the ambient humidity is 70%RH-80%RH. The second stage is the medium-low temperature, medium humidity, microwave power increase stage: the ambient temperature is 40-60℃, the ambient humidity is 40%RH-60%RH, and the microwave power is increased to 50-70% of the total power; The third stage is a low-microwave, low-humidity, and temperature-raising stage: the ambient temperature rises to 80-100℃, the ambient humidity is 10%RH-30%RH, and the microwave power is 20-30% of the total power; The total power is 200-300kW; The microwave drying device includes a microwave drying chamber, a blower, and a steam generator; the blower is connected to the microwave drying chamber through a duct to regulate the internal temperature of the microwave drying chamber; the steam generator is located inside the microwave drying chamber to regulate the internal humidity of the microwave drying chamber.

2. The method for rapid drying of solid ceramic bodies according to claim 1, characterized in that, The solid ceramic blank is a square ceramic blank.

3. The method for rapid drying of solid ceramic bodies according to claim 1 or 2, characterized in that, The drying time for the first stage is 8-24 hours.

4. The method for rapid drying of solid ceramic bodies according to claim 1 or 2, characterized in that, The drying time for the second stage is 36-60 hours.

5. The method for rapid drying of solid ceramic green bodies according to claim 1 or 2, characterized in that, The drying time for the third stage is 60-120 h.

6. The method for rapid drying of solid ceramic bodies according to claim 4, characterized in that, The second stage microwave power increase rate is to increase to a specified power value within 5 hours; the specified power is 100-210kW; the second stage humidity decrease rate is to decrease to a specified humidity range within 8 hours; the specified humidity range is 40%RH-60%RH.

7. The method for rapid drying of solid ceramic bodies according to claim 5, characterized in that, The third stage temperature rise rate is to reach a specified temperature value within 24 hours, where the specified temperature is 80-100℃; the third stage humidity decrease rate is to decrease to a specified humidity range within 8 hours, where the specified humidity is 10%RH-30%RH.

8. The method for rapid drying of solid ceramic blanks according to claim 1, characterized in that the microwave drying oven is equipped with a temperature sensor and a humidity sensor to monitor the internal ambient temperature and humidity of the device in real time.

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