Powder raw material preparation mixing device for A2Zr2O7 system ceramics

Abstract

Relates to an A2Zr2O7 system ceramic powder raw material preparation mixing device in the technical field of ceramic preparation. The A2Zr2O7 system ceramic powder raw material preparation mixing device comprises a horizontal roller, a supporting unit for supporting the roller in a rolling manner and a driving unit for driving the roller to rotate, the roller is obliquely arranged, two filter screen plates are mounted in the roller, so that an inner cavity of the roller is sequentially divided into a first grinding cavity, a second grinding cavity and a mixing cavity from the oblique high end to the oblique low end, and a plurality of grinding balls are arranged in each of the first grinding cavity and the second grinding cavity; a plurality of material raising plates which are uniformly distributed along the circumferential direction of the roller are fixed on the cavity wall of the mixing cavity; material doors are arranged on the roller wall of the roller corresponding to the first grinding cavity, the second grinding cavity and the mixing cavity; the mixing device is simple and reasonable in structure, and various raw materials can be separately ground and intensively mixed conveniently.

Description

Technical Field

[0001] The utility model relates to the technical field of ceramic preparation, in particular to a powder raw material preparation and mixing device for A2Zr2O7 system ceramics. Background Art

[0002] As is known, A2Zr2O7 system ceramics are a type of metal oxide ceramics, where "A" represents a divalent metal element, such as magnesium (Mg), calcium (Ca), barium (Ba), etc., and Zr represents zirconium. This type of ceramic has excellent thermal stability and thermal shock resistance, making it have important application value in many high-tech fields; the preparation process of A2Zr2O7 system ceramics includes steps such as raw material preparation, mixing, molding, sintering, surface treatment and performance testing, wherein the mixing step requires the oxide raw materials and additives or stabilizers to be mixed and ensured to be mixed evenly to ensure the uniformity of the final product; traditionally, in order to improve the uniformity of raw material particles, improve sintering and product performance, and increase the reaction rate, the mixed raw material particles are generally ground;

[0003] A Chinese utility model patent with announcement number CN210787200U discloses a raw material mixing device for ceramic processing. By setting a box at the feed inlet of a mixing barrel, and setting a grinding roller with grinding teeth and a filter screen for feeding in the box, the raw materials can be uniformly ground and crushed before mixing; however, for A2Zr2O7 system ceramics, the hardness and particle size requirements of the raw material zirconium oxide are different from those of other raw materials. Zirconia itself has a higher hardness and a more stringent grinding particle accuracy, which is not suitable for grinding with other raw material particles. In addition, the structure and hybrid power design of the existing mixing device itself are relatively complex. If an additional grinding box is added on this basis, the equipment cost will be greatly increased and the mixing effect will be affected. Utility Model Content

[0004] In order to overcome the deficiencies in the background technology and solve the existing technical problems, the utility model discloses a powder raw material preparation and mixing device for A2Zr2O7 system ceramics, which has a simple and reasonable structure and is convenient for separately grinding and centrally mixing a variety of raw materials.

[0005] In order to achieve the above-mentioned invention object, the utility model adopts the following technical solutions:

[0006] A powder raw material preparation and mixing device for A2Zr2O7 system ceramics, comprising a horizontally lying drum, a supporting unit for rolling and supporting the drum, and a driving unit for driving the drum to rotate; the drum is arranged at an angle, and two filter screens are installed in the drum to divide the inner cavity of the drum into a first grinding chamber, a second grinding chamber and a mixing chamber from the upper end to the lower end of the inclined direction, the first grinding chamber and the second grinding chamber are each provided with a plurality of grinding balls, the mixing chamber wall is fixed with a plurality of lifting plates evenly distributed along the circumference of the drum, and the drum walls corresponding to the first grinding chamber, the second grinding chamber and the mixing chamber are each provided with a material gate.

[0007] Furthermore, the filter screen is tilted relative to the cross section of the drum, and the tilt angle is 2 to 10 degrees.

[0008] Furthermore, the aperture of the filter screen plate close to the first grinding chamber is smaller than or equal to the aperture of the filter screen plate close to the mixing chamber.

[0009] Furthermore, the grinding balls in the first grinding chamber have various sizes and specifications.

[0010] Furthermore, the width of the lifting plate close to the inclined lower end of the drum is greater than the width close to the inclined higher end of the drum.

[0011] Furthermore, the support unit includes a roller frame, and two support rollers spaced apart and arranged side by side and coaxially with the drum, the wheel surfaces of the support rollers are supported by abutting against the outer wall of the drum, the support rollers are rotatably installed on the roller frame, and a positioning ring is fixed to the outer wall of the drum for abutting against the support rollers and limiting the axial movement of the drum.

[0012] Furthermore, the driving unit comprises an electric motor, a driving wheel is coaxially fixed to the output shaft of the electric motor, and a driven wheel drivingly connected to the driving wheel is coaxially fixed to the corresponding outer end surface of the drum.

[0013] Furthermore, the inclination angle of the drum relative to the horizontal plane is 2 to 7 degrees.

[0014] Due to the adoption of the above-mentioned technical solution, the utility model has the following beneficial effects:

[0015] The powder raw material preparation and mixing device of A2Zr2O7 system ceramics disclosed in the utility model directly adopts a roller grinding and mixing method, which optimizes the complex design of the coexistence of traditional mechanical stirring and rolling grinding, not only reduces the equipment cost, but also improves the efficiency; at the same time, it can grind separately according to the characteristics and grinding requirements of different raw materials, and gradually mix the particles that have been ground to meet the requirements, which also greatly improves the mixing effect and is particularly suitable for large-scale mixed production. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the utility model.

[0017] In the figure: 1. Support unit; 2. Drive unit; 3. Drum; 4. Filter plate; 5. First grinding chamber; 6. Second grinding chamber; 7. Mixing chamber; 8. Grinding balls; 9. Lifting plate; 10. Material door; 11. Positioning ring. DETAILED DESCRIPTION

[0018] The technical solution of the present invention will be described below in conjunction with the drawings in the embodiments of the present invention. In the description, it should be understood that if there are terms such as "upper", "lower", "front", "rear", "left", "right" and the like indicating directions or positional relationships, they are only corresponding to the drawings of the present invention, for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific direction:

[0019] Combined with Figure 1 The powder raw material preparation and mixing device of A2Zr2O7 system ceramics comprises a horizontally lying roller 3, a supporting unit 1 for rolling and supporting the roller 3, and a driving unit 2 for driving the roller 3 to rotate; as needed, the supporting unit 1 comprises a roller frame, and two support rollers spaced side by side and coaxial with the roller 3, the wheel surface of the support roller is supported by the outer wall of the roller 3, the support roller is rotatably installed on the roller frame, the outer wall of the roller 3 is fixed with a positioning ring 11 for contacting the support roller and limiting the axial movement of the roller 3, the roller 3 is rollingly supported by the support roller, and both ends of each support roller are provided with a positioning ring 11, so that the support roller can be stuck in the middle, thereby preventing the roller 3 from moving or detaching from the support roller; in addition, the driving unit 2 comprises an electric motor, the output shaft of the electric motor is coaxially fixed with a driving wheel, and the corresponding outer end surface of the roller 3 is coaxially fixed with a driven wheel connected to the driving wheel, and the specific driving wheel and the driven wheel can be set to be directly meshed with gears for transmission, or transmitted through a transmission leather chain;

[0020] The drum 3 is tilted to facilitate all the raw materials to be stirred and mixed at the lower point. The tilt angle of the drum 3 relative to the horizontal plane is 2 to 7 degrees. The tilt angle is mainly related to the grinding time and the grinding amount. When the time is long and the grinding amount is large, the tilt angle can be set to be smaller. Two filter screens 4 are installed in the drum 3 to separate the inner cavity of the drum 3 from the high end to the low end into a first grinding chamber 5, a second grinding chamber 6 and a mixing chamber 7, which is convenient for separate grinding and then centralized mixing. The grinding raw materials placed in the first grinding chamber 5 are harder than those placed in the second grinding chamber 6, so that when filtering through the second grinding chamber 5, they can also be further mixed. Grinding; as needed, the filter screen plate 4 is inclined relative to the cross section of the drum 3, and the inclination angle is 2 to 10 degrees. Since the drum 3 itself is inclined, if the filter screen plate 4 is not inclined, the raw materials will accumulate to the low point in the chamber due to gravity, and the filter screen plate 4 is inclined, when the drum 3 rotates, the materials at the low point can be properly pushed back along the axial direction of the drum 3 to the high point, thereby increasing the grinding efficiency and improving the grinding effect; in addition, the aperture of the filter screen plate 4 close to the first grinding chamber 5 is less than or equal to the aperture of the filter screen plate 4 close to the mixing chamber 7, that is, the raw material particles ground in the first grinding chamber 5 can be conveniently directly entered into the mixing chamber 7 for mixing;

[0021] The first grinding chamber 5 and the second grinding chamber 6 are both provided with a plurality of grinding balls 8, the hardness of the grinding balls 8 can be adjusted according to the grinding raw materials, the grinding balls 8 in the first grinding chamber 5 are of various sizes and specifications, and the grinding balls 8 of various specifications are arranged in a stepped size, which can also achieve a grinding effect when the amount of raw material particles is small; the wall of the mixing chamber 7 is fixed with a plurality of lifting plates 9 evenly distributed along the circumference of the drum 3, and the lifting plates 9 can lift the raw material particles for uniform mixing when the drum 3 rotates; according to needs, the width of the lifting plates 9 close to the inclined lower end of the drum 3 is greater than the width close to the inclined high end of the drum 3, so as to increase the lifting height of the materials accumulated at the low point; the drum 3 walls corresponding to the first grinding chamber 5, the second grinding chamber 6 and the mixing chamber 7 are all provided with material gates 10, and the material gates 10 are used to put in or take out materials. The material gate 10 of the mixing chamber 7 is generally set at the low point of the drum 3 wall.

[0022] In the powder raw material preparation and mixing device for A2Zr2O7 system ceramics described in the utility model, various raw materials are weighed according to the proportion, the zirconium oxide raw material is placed in the first grinding chamber 5, and the remaining raw materials are placed in the second grinding chamber 6, and then the driving unit 2 is started to drive the drum 3 to rotate for separate grinding. After the raw material particles in the grinding chamber meet the grinding standard, they are collected in the mixing chamber 7 through the filter screen plate 4. After the mixing is completed, the machine is stopped and the mixed raw materials are taken out from the material door 10.

[0023] The parts of the present invention that are not described in detail are prior art. It is obvious to those skilled in the art that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the above-mentioned embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is limited by the attached claims rather than the above description. Therefore, it is intended to include all changes within the meaning and scope of the equivalent elements of the claims in the present invention, and any figure marks in the claims should not be regarded as limiting the content of the claims involved.

Claims

1. A powder raw material preparation and mixing device for A2Zr2O7 system ceramics, comprising a horizontally lying roller (3), a support unit (1) for rolling and supporting the roller (3), and a driving unit (2) for driving the roller (3) to rotate, wherein: The drum (3) is arranged at an angle, and two filter screens (4) are installed in the drum (3) to divide the inner cavity of the drum (3) into a first grinding chamber (5), a second grinding chamber (6) and a mixing chamber (7) in sequence from the upper end of the angle to the lower end of the angle. A plurality of grinding balls (8) are provided in each of the first grinding chamber (5) and the second grinding chamber (6). A plurality of lifting plates (9) evenly distributed along the circumference of the drum (3) are fixed to the wall of the mixing chamber (7). Material gates (10) are provided on the walls of the drum (3) corresponding to the first grinding chamber (5), the second grinding chamber (6) and the mixing chamber (7).

2. The powder raw material preparation and mixing device for A2Zr2O7 system ceramics according to claim 1, characterized in that: The filter screen plate (4) is arranged to be inclined relative to the cross section of the drum (3), and the inclination angle is 2 to 10 degrees.

3. The powder raw material preparation and mixing device for A2Zr2O7 system ceramics according to claim 1, characterized in that: The aperture of the filter screen plate (4) close to the first grinding chamber (5) is smaller than or equal to the aperture of the filter screen plate (4) close to the mixing chamber (7).

4. The powder raw material preparation and mixing device for A2Zr2O7 system ceramics according to claim 1, characterized in that: The grinding balls (8) in the first grinding chamber (5) have various sizes and specifications.

5. The powder raw material preparation and mixing device for A2Zr2O7 system ceramics according to claim 1, characterized in that: The width of the lifting plate (9) close to the inclined lower end of the roller (3) is greater than the width close to the inclined higher end of the roller (3).

6. The powder raw material preparation and mixing device for A2Zr2O7 system ceramics according to claim 1, characterized in that: The support unit (1) comprises a roller frame, and two support rollers spaced apart and arranged side by side and coaxially with the roller (3); the wheel surfaces of the support rollers are supported by the outer wall of the roller (3); the support rollers are rotatably mounted on the roller frame; and a positioning ring (11) is fixedly mounted on the outer wall of the roller (3) for contacting the support rollers and limiting the axial movement of the roller (3).

7. The powder raw material preparation and mixing device for A2Zr2O7 system ceramics according to claim 1, characterized in that: The driving unit (2) comprises an electric motor, a driving wheel is coaxially fixed to the output shaft of the electric motor, and a driven wheel drivingly connected to the driving wheel is coaxially fixed to the corresponding outer end surface of the roller (3).

8. The powder raw material preparation and mixing device for A2Zr2O7 system ceramics according to claim 1, characterized in that: The inclination angle of the drum (3) relative to the horizontal plane is 2 to 7 degrees.

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