Zirconium dioxide ceramic waste regeneration process

Abstract

The invention discloses a zirconium dioxide ceramic waste regeneration process, and belongs to the technical field of zirconium dioxide processing, and the zirconium dioxide ceramic waste regeneration process comprises the following steps: firstly, crushing ceramic waste, and then removing impurities through screening to obtain ceramic powder; mixing the screened ceramic powder with a 98% concentrated sulfuric acid solution, carrying out an acid leaching reaction at 240-300 DEG C, and dissolving zirconium dioxide in the ceramic with an acid solution to form a soluble zirconium salt; the zirconium salt is precipitated by adjusting the pH value of the solution, and the precipitate is washed for multiple times to remove residual acid and other impurities; the washed precipitate is dried and then calcined at a high temperature, so that the precipitate is converted into zirconium dioxide; and crushing the calcined zirconium dioxide to obtain the required particle size, and carrying out grading treatment to obtain products with different particle sizes. In the whole process, crushing and smashing integrated equipment is adopted to smash the ceramic waste and the calcined zirconium dioxide, so that the treatment efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of zirconium dioxide processing, and in particular relates to a zirconium dioxide ceramic waste recycling process. Background Art

[0002] With the widespread application of industrial ceramics and fine ceramics, the demand for high-purity zirconium dioxide is growing. As a potential source of raw materials, the recycling of ceramic waste can reduce environmental pollution and meet the market demand for zirconium dioxide. Processing zirconium dioxide from ceramic waste requires advanced technology to ensure product quality and purity. This includes pretreatment, chemical treatment, separation and purification of waste, and subsequent drying and calcination processes. The recycling of ceramic waste is in line with the environmental protection concept of sustainable development. By processing waste to produce zirconium dioxide, the exploitation of primary resources can be reduced and environmental damage can be reduced.

[0003] The process of processing ceramic waste into high-purity zirconium dioxide involves multiple steps, each of which requires specific equipment to complete. First, the pretreatment of the waste requires crushing and screening equipment to process the waste into a size suitable for subsequent chemical treatment. Next, the chemical treatment stage requires the use of reactors and filtration equipment to remove impurities and extract zirconium dioxide. The separation and purification process may require centrifuges, sedimentation tanks, and drying equipment to further purify the zirconium dioxide. Finally, the drying and calcination process requires dryers and calciners to obtain the final product. Due to the use of these processes and equipment, production efficiency may be affected because each process takes time to complete and the equipment needs to be coordinated. In addition, the maintenance, operation, and replacement of equipment may also cause production interruptions, thereby reducing overall production efficiency. Summary of the invention

[0004] In view of the problems existing in the prior art, the present invention provides a zirconium dioxide ceramic waste regeneration process, which has the advantage of improving efficiency and solves the problems of the prior art.

[0005] The present invention is achieved by a process for regenerating zirconium dioxide ceramic waste, comprising the following steps: Crushing and screening: First, the ceramic waste is crushed, and then impurities are removed by screening to obtain ceramic powder; Acid leaching: Mix the screened ceramic powder with 98% concentrated sulfuric acid solution and carry out acid leaching reaction at 240-300℃. The acid dissolves the zirconium dioxide in the ceramic to form soluble zirconium salt. Precipitation and washing: The zirconium salt is precipitated by adjusting the pH value of the solution, and the precipitate is washed several times to remove residual acid and other impurities; Calcination: The washed precipitate is dried and then calcined at a high temperature to convert the precipitate into zirconium dioxide; Crushing and grading: The calcined zirconium dioxide is crushed to obtain the required particle size, and products with different particle sizes are obtained through grading; The ceramic waste is crushed and the calcined zirconium dioxide is crushed by an integrated crushing and pulverizing device, and two inner chambers are arranged in the integrated crushing and pulverizing device to crush the ceramic waste and the calcined zirconium dioxide at the same time.

[0006] As preferred embodiment of the present invention, the crushing and screening comprises the following steps: Using the integrated crushing and pulverizing device to preliminarily pulverize the ceramic waste into small pieces; The crushed small pieces of ceramic waste are further ground by the crushing and pulverizing integrated device until fine ceramic powder is formed; The ceramic powder is screened through sieves of different apertures to remove large particle impurities; The screened powder is subjected to magnetic separation to remove metal impurities and obtain ceramic powder.

[0007] As preferred embodiment of the present invention, the acid leaching comprises the following steps: The screened ceramic powder is mixed with 98% concentrated sulfuric acid, and the mixture is placed in a high temperature and high pressure resistant reactor; Heat the reactor to 240-300°C and keep it for a certain period of time to ensure sufficient reaction. After the reaction is completed, let the mixture cool naturally; The cooled mixture is filtered to separate the unreacted solid and the acid solution containing the zirconium salt.

[0008] As preferred embodiment of the present invention, the precipitation and washing comprises the following steps: Slowly add alkaline substances to the acid solution containing zirconium salt to adjust the pH value to a range suitable for precipitation; Observe and confirm that the zirconium salt begins to precipitate; Continue to add alkaline substances until the pH value stabilizes to ensure complete precipitation of the zirconium salt; Filter the precipitate to collect the precipitate; Wash the precipitate several times, using deionized water each time, until the pH value of the washing solution is close to neutral; After washing, the precipitate is dried.

[0009] As preferred in the present invention, the calcination comprises the steps of: The dried precipitate is placed in a calcining furnace and slowly heated to a set calcining temperature under a controlled atmosphere; Maintain the calcination temperature for a period of time to ensure that the precipitate is completely converted into zirconium dioxide. After the calcination is completed, the zirconium dioxide is allowed to cool naturally; The calcined zirconium dioxide is taken out and prepared for the next step of crushing and grading.

[0010] As preferred embodiment of the present invention, the crushing and classification include: The calcined zirconium dioxide is placed in the integrated crushing and pulverizing equipment for crushing and pulverizing; Select the crushing equipment and screen according to the required particle size, and after preliminary crushing, use the screen to screen out the zirconium dioxide that meets the particle size requirements; The zirconium dioxide that does not meet the particle size requirement is returned to the integrated crushing and pulverizing device for further pulverization; The crushed zirconium dioxide is graded and sieves with different apertures are used to separate products of different particle sizes.

[0011] As a preferred embodiment of the present invention, the integrated crushing and pulverizing equipment comprises: A crushing mechanism, the crushing mechanism comprising a base, two supports are fixedly connected to the upper side of the base, the supports are fixedly connected to a rotating connection member, a feed pipe is rotatably connected to the rotating connection member, the feed pipe is fixedly connected to a roller, a ball is provided on the roller, two baffles are provided inside the roller, and the two baffles divide the inside of the roller into an intermediate chamber and two side chambers; The crushing mechanism is provided with two, which are respectively located at the two ends of two feeding pipes. The crushing mechanism comprises a crushing bin, in which a crushing roller is provided, and a feeding mechanism is provided at the lower side of the crushing bin, and the feeding mechanism is connected to the feeding pipe.

[0012] As a preferred embodiment of the present invention, the feeding mechanism includes a feeding cylinder, which is located at the lower side of the discharge port of the crushing bin and is connected to the discharge port of the crushing bin; a rotating shaft is provided in the feeding cylinder, and spiral feeding blades are arranged around the rotating shaft, and the spiral feeding blades extend into the feed pipe.

[0013] As a preferred embodiment of the present invention, the rotating shaft extends in the drum; the baffle is connected to the drum by screws, and when the screws are removed, the baffle can move along the axial direction of the drum, and the baffle is connected to the rotating shaft.

[0014] As a preferred embodiment of the present invention, each of the side chambers corresponds to two groups of annular discharge holes, the apertures of the two groups of discharge holes are different and they are arranged alternately; a connecting rod is fixedly connected to the baffle plate, an annular baffle is fixedly connected to the connecting rod, the annular baffle is attached to the inner wall of the side chamber, and the annular baffle can block one of the groups of discharge holes.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. During the whole process, the integrated crushing and pulverizing equipment is used to pulverize the ceramic waste and calcined zirconium dioxide, which improves the processing efficiency.

[0016] 2. Resource recycling: This process realizes the recycling of zirconium dioxide ceramic waste, reduces resource waste, and reduces dependence on primary mineral resources.

[0017] 3. Environmental protection and energy saving: Extracting zirconium dioxide through chemical methods reduces energy consumption and environmental pollution compared with traditional mining and processing methods.

[0018] 4. Product diversification: Through graded processing, zirconium dioxide products with different particle sizes can be obtained to meet the needs of different fields. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a flowchart of the zirconium dioxide ceramic waste regeneration process provided in Example 1 of the present invention; Figure 2 It is a schematic diagram of the three-dimensional structure of the integrated crushing and pulverizing equipment provided in Example 1 of the present invention; Figure 3 It is a right side structural schematic diagram of the integrated crushing and pulverizing device provided in Example 1 of the present invention; Figure 4 The embodiment 1 of the present invention provides Figure 3 Schematic diagram of the cross-sectional structure of the AA part; Figure 5 The embodiment 1 of the present invention provides Figure 4 A schematic diagram of the enlarged structure of part B; Figure 6 It is a right side structural schematic diagram of the integrated crushing and pulverizing device provided in Example 2 of the present invention; Figure 7 Embodiment 2 of the present invention provides Figure 6 Schematic diagram of the cross-sectional structure of the CC part; Figure 8 Embodiment 2 of the present invention provides Figure 7 The structural schematic diagram of the connecting rod and the annular baffle is omitted; Fig. 9 Embodiment 2 of the present invention provides Figure 8 A schematic diagram of the enlarged structure of the D part; Fig.10 It is a schematic diagram of the structure of the connecting rod and the annular baffle provided in Example 2 of the present invention.

[0020] In the figure: 1. base; 2. support; 3. rotating connecting piece; 4. feed pipe; 5. roller; 6. baffle; 7. middle chamber; 8. side chamber; 9. crushing bin; 10. crushing roller; 11. feed cylinder; 12. rotating shaft; 13. spiral feed blade; 14. discharge hole; 15. connecting rod; 16. annular baffle. DETAILED DESCRIPTION

[0021] In order to further understand the content, features and effects of the present invention, the following embodiments are given as examples and described in detail with reference to the accompanying drawings.

[0022] The structure of the present invention is described in detail below in conjunction with the accompanying drawings.

[0023] See also Figure 1-Figure 5 The embodiment of the present invention provides a zirconium dioxide ceramic waste recycling process, comprising the following steps: Step S1, crushing and screening: firstly, the ceramic waste is crushed, and then impurities are removed by screening to obtain ceramic powder; Step S2, acid leaching: the screened ceramic powder is mixed with a 98% concentrated sulfuric acid solution, and an acid leaching reaction is performed at 240-300° C. The acid solution dissolves the zirconium dioxide in the ceramic to form a soluble zirconium salt; Step S3, precipitation and washing: the pH value of the solution is adjusted to precipitate the zirconium salt, and the precipitate is washed multiple times to remove residual acid and other impurities; Step S4, calcination: drying the washed precipitate, and then calcining it at a high temperature to convert the precipitate into zirconium dioxide; Step S5, crushing and grading: crushing the calcined zirconium dioxide to obtain the required particle size, and obtaining products with different particle sizes through grading; The ceramic waste is crushed and the calcined zirconium dioxide is crushed by an integrated crushing and pulverizing device, and two inner chambers are arranged in the integrated crushing and pulverizing device to crush the ceramic waste and the calcined zirconium dioxide at the same time.

[0024] The zirconium dioxide ceramic waste recycling process first refines the ceramic waste and removes impurities through crushing and screening steps to ensure the purity of the raw materials for subsequent processing. Subsequently, the zirconium dioxide in the ceramic is dissolved into a soluble zirconium salt by utilizing the strong corrosiveness of concentrated sulfuric acid at high temperature. The zirconium salt is precipitated by adjusting the pH value of the solution, and impurities are removed through multiple washings. After the precipitate is dried, it is calcined at high temperature and converted into pure zirconium dioxide. Finally, by crushing and grading, a zirconium dioxide product that meets the requirements is obtained. Throughout the process, an integrated crushing and crushing device is used to crush the ceramic waste and the calcined zirconium dioxide, thereby improving the processing efficiency.

[0025] For example, ceramic manufacturing companies generate a large amount of ceramic waste containing zirconium dioxide every year. The company adopts the above-mentioned regeneration process, first using a crushing and pulverizing integrated equipment to crush and screen the waste to obtain pure ceramic powder. Subsequently, the powder is reacted with concentrated sulfuric acid at high temperature to dissolve the zirconium dioxide to form zirconium salt. After precipitation, washing, drying and calcination, pure zirconium dioxide is obtained. Finally, through crushing and grading, zirconium dioxide products with particle sizes of 1 micron, 5 microns and 10 microns are produced. These products are widely used in ceramic manufacturing, electronic materials, catalysts and other fields, realizing the resource utilization of waste and the sustainable development of enterprises.

[0026] Specifically, in step S1, the crushing and screening includes the following steps: Step S11, using the integrated crushing and pulverizing device to preliminarily pulverize the ceramic waste into small pieces; Step S12, further grinding the crushed small pieces of ceramic waste through the crushing and pulverizing integrated equipment until fine ceramic powder is formed; Step S13, screening the ceramic powder through sieves with different apertures to remove large particle impurities therein; Step S14, magnetic separation is performed on the screened powder to remove metal impurities to obtain ceramic powder.

[0027] Specifically, in step S2, the acid leaching comprises the following steps: Step S21, mixing the screened ceramic powder with 98% concentrated sulfuric acid, and placing the mixture into a high temperature and high pressure resistant reactor; Step S22, heating the reactor to 240-300° C. and maintaining the temperature for a certain period of time to ensure sufficient reaction. After the reaction is completed, allowing the mixture to cool naturally; Step S23, filtering the cooled mixture to separate unreacted solids and acid solution containing zirconium salt.

[0028] Specifically, in step S3, the precipitation and washing comprises the following steps: Step S31, slowly adding an alkaline substance, such as sodium hydroxide, to the acid solution containing the zirconium salt to adjust the pH value to a range suitable for precipitation; Step S32, observing and confirming that the zirconium salt begins to precipitate; Step S33, continue to add alkaline substances until the pH value is stable to ensure that the zirconium salt is completely precipitated; Step S34, filtering the precipitate and collecting the precipitate; Step S35, washing the precipitate multiple times, using deionized water each time, until the pH value of the washing solution is close to neutral; Step S36, after washing is completed, the precipitate is dried.

[0029] Specifically, step S4, the calcination comprises the steps of: Step S41, placing the dried precipitate into a calcining furnace, and slowly heating it to a set calcining temperature under a controlled atmosphere; Step S42, maintaining the calcination temperature for a period of time to ensure that the precipitate is completely converted into zirconium dioxide, and after the calcination is completed, allowing the zirconium dioxide to cool naturally; Step S43, taking out the calcined zirconium dioxide and preparing for the next step of crushing and grading.

[0030] Specifically, in step S5, the crushing and classification includes: Step S51, placing the calcined zirconium dioxide into the integrated crushing and pulverizing equipment for crushing and pulverizing; Step S52, selecting a crushing device and a screen according to the required particle size, performing preliminary crushing, and screening out zirconium dioxide that meets the particle size requirements through the screen; Step S53, returning the zirconium dioxide that does not meet the particle size requirement to the integrated crushing and pulverizing device for further pulverization; Step S54, classifying the crushed zirconium dioxide, and using sieves with different apertures to separate products with different particle sizes.

[0031] Specifically, the integrated crushing and pulverizing equipment includes: A crushing mechanism, the crushing mechanism comprises a base 1, two supports 2 are fixedly connected to the upper side of the base 1, the supports 2 are fixedly connected to a rotating connection 3, a feed pipe 4 is rotatably connected to the rotating connection 3, a roller 5 is fixedly connected to the feed pipe 4, a ball bearing is arranged on the roller 5, two baffles 6 are arranged inside the roller 5, and the two baffles 6 divide the inside of the roller 5 into an intermediate chamber 7 and two side chambers 8; The crushing mechanism is provided with two, which are respectively located at the two ends of the two feeding pipes 4. The crushing mechanism comprises a crushing bin 9, in which a crushing roller 10 is provided. A feeding mechanism is provided at the lower side of the crushing bin 9, and the feeding mechanism is connected to the feeding pipe 4.

[0032] Through this arrangement, one of the crushing mechanisms first crushes the ceramic waste, and then transports it to one of the side chambers 8 through the feeding mechanism, and the side chamber 8 can crush the ceramic waste; the other crushing mechanism crushes the calcined zirconium dioxide, and then transports it to the other side chamber 8 through the corresponding feeding mechanism, and the side chamber 8 can crush the calcined zirconium dioxide; the sieve holes corresponding to the two side chambers 8 can be different, and the two processes can be carried out simultaneously, thereby improving production efficiency.

[0033] Since the device is symmetrical, only one half is described below: Specifically, the feeding mechanism includes a feeding cylinder 11, which is located at the lower side of the discharge port of the crushing bin 9 and is connected to the discharge port of the crushing bin 9; a rotating shaft 12 is provided in the feeding cylinder 11, and a spiral feeding blade 13 is arranged around the rotating shaft 12, and the spiral feeding blade 13 extends into the feed pipe 4.

[0034] Specifically, the rotating shaft 12 can be driven to rotate by a motor, or the following settings can be performed: The rotating shaft 12 extends in the drum 5; The baffle plate 6 is connected to the drum 5 via screws. When the screws are removed, the baffle plate 6 can move along the axial direction of the drum 5 . The baffle plate 6 is connected to the rotating shaft 12 .

[0035] When the screw is removed, the baffle 6 can be moved by axially moving the shaft 12, thereby adjusting the size of the side chamber 8. In addition, the baffle 6 can drive the shaft 12 to rotate, thereby completing the feeding. When the drum 5 is reversed, the crushed material can also be discharged to the other end of the conveying pipe, so that only crushing is performed.

[0036] See also Figure 6-10 , based on Example 1, the following features are added: Each of the side chambers 8 corresponds to two groups of annular discharge holes 14, and the two groups of discharge holes 14 have different apertures and are arranged alternately; The baffle plate 6 is fixedly connected with a connecting rod 15 , and the connecting rod 15 is fixedly connected with an annular baffle 16 . The annular baffle 6 is attached to the inner wall of the side chamber 8 , and the annular baffle 6 can cover one group of discharge holes 14 .

[0037] The annular baffle 6 can block one group of discharge holes 14, so that the crushed material is discharged from the other group of discharge holes 14, and the particle size of the crushed material can be adjusted.

[0038] Working principle of the present invention: First, through the crushing and screening steps, the ceramic waste is refined and impurities are removed to ensure the purity of the raw materials for subsequent processing. Subsequently, the strong corrosiveness of concentrated sulfuric acid at high temperature is used to dissolve the zirconium dioxide in the ceramic into soluble zirconium salts. The zirconium salt is precipitated by adjusting the pH value of the solution, and impurities are removed after multiple washings. After the precipitate is dried, it is calcined at high temperature and converted into pure zirconium dioxide. Finally, through crushing and grading, a zirconium dioxide product that meets the requirements is obtained. Throughout the process, the ceramic waste and the calcined zirconium dioxide are crushed using an integrated crushing and crushing equipment to improve the processing efficiency.

[0039] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0040] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A zirconium dioxide ceramic waste recycling process, characterized in that: The following steps are involved: Crushing and screening: First, the ceramic waste is crushed, and then impurities are removed by screening to obtain ceramic powder; Acid leaching: Mix the screened ceramic powder with 98% concentrated sulfuric acid solution and carry out acid leaching reaction at 240-300℃. The acid dissolves the zirconium dioxide in the ceramic to form soluble zirconium salt. Precipitation and washing: The zirconium salt is precipitated by adjusting the pH value of the solution, and the precipitate is washed several times to remove residual acid and other impurities; Calcination: The washed precipitate is dried and then calcined at a high temperature to convert the precipitate into zirconium dioxide; Crushing and grading: The calcined zirconium dioxide is crushed to obtain the required particle size, and products with different particle sizes are obtained through grading; The ceramic waste is crushed and the calcined zirconium dioxide is crushed by an integrated crushing and pulverizing device, and two inner chambers are arranged in the integrated crushing and pulverizing device to crush the ceramic waste and the calcined zirconium dioxide at the same time.

2. A zirconium dioxide ceramic waste recycling process as claimed in claim 1, characterized in that: The crushing and screening comprises the following steps: Using the integrated crushing and pulverizing device to preliminarily pulverize the ceramic waste into small pieces; The crushed small pieces of ceramic waste are further ground by the crushing and pulverizing integrated device until fine ceramic powder is formed; The ceramic powder is screened through sieves of different apertures to remove large particle impurities; The screened powder is subjected to magnetic separation to remove metal impurities and obtain ceramic powder.

3. A zirconium dioxide ceramic waste recycling process as claimed in claim 1, characterized in that: The acid leaching comprises the following steps: The screened ceramic powder is mixed with 98% concentrated sulfuric acid, and the mixture is placed in a high temperature and high pressure resistant reactor; Heat the reactor to 240-300°C and keep it for a certain period of time to ensure sufficient reaction. After the reaction is completed, let the mixture cool naturally; The cooled mixture is filtered to separate the unreacted solid and the acid solution containing the zirconium salt.

4. A zirconium dioxide ceramic waste recycling process as claimed in claim 1, characterized in that: The precipitation and washing comprises the following steps: Slowly add alkaline substances to the acid solution containing zirconium salt to adjust the pH value to a range suitable for precipitation; Observe and confirm that the zirconium salt begins to precipitate; Continue to add alkaline substances until the pH value stabilizes to ensure complete precipitation of the zirconium salt; Filter the precipitate to collect the precipitate; Wash the precipitate several times, using deionized water each time, until the pH value of the washing solution is close to neutral; After washing, the precipitate is dried.

5. A zirconium dioxide ceramic waste recycling process as claimed in claim 1, characterized in that: The calcination comprises the steps of: The dried precipitate is placed in a calcining furnace and slowly heated to a set calcining temperature under a controlled atmosphere; Maintain the calcination temperature for a period of time to ensure that the precipitate is completely converted into zirconium dioxide. After the calcination is completed, the zirconium dioxide is allowed to cool naturally; The calcined zirconium dioxide is taken out and prepared for the next step of crushing and grading.

6. A zirconium dioxide ceramic waste recycling process as claimed in claim 1, characterized in that: The crushing and classification include: The calcined zirconium dioxide is placed in the integrated crushing and pulverizing equipment for crushing and pulverizing; Select the crushing equipment and screen according to the required particle size, and after preliminary crushing, use the screen to screen out the zirconium dioxide that meets the particle size requirements; The zirconium dioxide that does not meet the particle size requirement is returned to the integrated crushing and pulverizing device for further pulverization; The crushed zirconium dioxide is graded and sieves with different apertures are used to separate products of different particle sizes.

7. A zirconium dioxide ceramic waste recycling process as claimed in claim 1, characterized in that: The integrated crushing and pulverizing equipment comprises: A pulverizing mechanism, the pulverizing mechanism comprising a base (1), two supports (2) being fixedly connected to the upper side of the base (1), the supports (2) being fixedly connected to a rotating connection member (3), the rotating connection member (3) being rotatably connected to a feed pipe (4), the feed pipe (4) being fixedly connected to a roller (5), the roller (5) being provided with a ball bearing, the roller (5) being provided with two baffles (6), and the two baffles (6) dividing the interior of the roller (5) into an intermediate chamber (7) and two side chambers (8); A crushing mechanism, wherein two crushing mechanisms are provided and are respectively located at the two ends of two feeding pipes (4), the crushing mechanism comprising a crushing bin (9), a crushing roller (10) being provided in the crushing bin (9), and a feeding mechanism being provided at the lower side of the crushing bin (9), the feeding mechanism being connected to the feeding pipe (4).

8. A zirconium dioxide ceramic waste recycling process as claimed in claim 7, characterized in that: The feeding mechanism comprises a feeding cylinder (11), wherein the feeding cylinder (11) is located at the lower side of the discharge port of the crushing bin (9) and is connected to the discharge port of the crushing bin (9); A rotating shaft (12) is provided in the material conveying cylinder (11), and a spiral material conveying blade (13) is arranged around the rotating shaft (12), and the spiral material conveying blade (13) extends into the material feeding pipe (4).

9. A zirconium dioxide ceramic waste recycling process as claimed in claim 8, characterized in that: The rotating shaft (12) extends in the drum (5); The baffle (6) is connected to the roller (5) via screws; when the screws are removed, the baffle (6) can move along the axial direction of the roller (5); the baffle (6) is connected to the rotating shaft (12).

10. A zirconium dioxide ceramic waste recycling process as claimed in claim 9, characterized in that: Each of the side chambers (8) corresponds to two groups of annularly arranged discharge holes (14), the two groups of discharge holes (14) having different apertures and being arranged alternately; The baffle plate (6) is fixedly connected to a connecting rod (15), and the connecting rod (15) is fixedly connected to an annular baffle (16), the annular baffle (16) being attached to the inner wall of the side chamber (8), and the annular baffle (16) being capable of covering one group of discharge holes (14).

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