Device capable of enabling cubic boron nitride to be subjected to ventilation reaction

Abstract

The utility model discloses a device capable of realizing ventilation reaction of cubic boron nitride, which comprises a rotary driving mechanism, a rotary drum and a rack, the rotary driving mechanism is fixed on the rack, the rotary drum is in transmission connection with the rotary driving mechanism, a heating device can provide temperature required by ventilation reaction of materials, and an oxidizing gas supply device is communicated with the rotary drum. According to the device disclosed by the utility model, impurities contained in the cubic boron nitride can be more sufficiently and thoroughly oxidized by oxidizing gas, so that the purification effect on the cubic boron nitride is achieved, the process is green and environment-friendly, and the harm of a traditional acid pickling purification process to the environment and personnel is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of superhard materials, in particular to a device capable of causing cubic boron nitride to ventilate and react. Background Art

[0002] After cubic boron nitride is synthesized under high temperature and pressure, the synthesized rods must be purified to obtain pure cubic boron nitride. Acid washing is a key step in the traditional purification process. Strong acids such as concentrated nitric acid and sulfuric acid are used in a specific ratio at high temperature to remove impurities such as graphite and catalysts from the cubic boron nitride. These strong acids not only produce sulfur dioxide and nitrogen dioxide gases during use, polluting the environment, but are also prone to causing production accidents, endangering the safety of production personnel.

[0003] To address the above issues, a clean oxidizing gas is used to oxidize the impurities in cubic boron nitride, thereby removing the impurities and purifying the cubic boron nitride. The present device is designed to allow for a more complete and necessary reaction between the gas and the impurities in the cubic boron nitride. Utility Model Content

[0004] In order to solve the above problems in the prior art, the utility model provides a device that can enable cubic boron nitride to ventilate and react.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] A device for ventilating cubic boron nitride comprises a rotary drive mechanism, a rotating drum, a frame, a heating device and an oxidizing gas supply device. The rotary drive mechanism is fixed on the frame, and the rotating drum is placed horizontally and is in transmission connection with the rotary drive mechanism.

[0007] The oxidizing gas supply device is connected to the rotating drum and is used to provide the oxidizing gas required for the ventilation reaction of the material in the rotating drum.

[0008] The heating device is used to provide the temperature required for the ventilation reaction of the material in the drum.

[0009] Preferably, the rotary drive mechanism includes a motor and two pairs of rotary support wheels, the rotary support wheels are symmetrically arranged on the frame in front and back and left and right directions, the motor is fixed on the frame and connected to the corresponding rotary support wheels through a transmission shaft.

[0010] Preferably, the drum includes a drum body, with drum doors and sealing plates respectively provided at both ends of the drum body, an exhaust hole provided at the center of the drum door, a shaft seal provided at the center of the sealing plate, and the drum placed on two pairs of rotating support wheels and connected to them in a transmission manner.

[0011] Preferably, the oxidizing gas supply device includes a gas cylinder and a gas pipe, one end of the gas pipe is connected to the rotating drum through a shaft seal, and the other end is connected to the gas cylinder.

[0012] Preferably, it further includes a box body, a box cover is arranged on the rotating drum, both ends of the rotating drum are open structures, exhaust holes are provided on the box body, a box door is provided at one end of the box body, the frame is fixed on the bottom plate inside the box body, the heating device is arranged in the box body, the oxidizing gas supply device includes a gas cylinder and a gas pipe, one end of the gas pipe is connected to the gas cylinder, and the other end of the gas pipe passes through the box body and extends into the rotating drum, and a number of air nozzles are evenly arranged on the gas pipe in the rotating drum.

[0013] Preferably, the heating method of the heating device is resistance heating, including a resistance wire heating element, and the resistance wire is evenly arranged in a serpentine shape.

[0014] Beneficial effects of the utility model:

[0015] The utility model makes full use of the unique characteristics of cubic boron nitride and oxidizing gas, adopts clean oxidizing gas to carry out oxidation reaction on impurities contained in cubic boron nitride, and the utility model makes the reaction more sufficient and more thorough, thereby achieving the purification effect of cubic boron nitride. This process is green and environmentally friendly, and avoids the harm to the environment and personnel caused by traditional pickling purification process. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the three-dimensional structure of the first embodiment of the present utility model. Figure 1 ;

[0017] Figure 2 This is a schematic diagram of the three-dimensional structure of the first embodiment of the present utility model. Figure 2 ;

[0018] Figure 3 This is a cross-sectional view of the drum in Example 1 of the present utility model;

[0019] Figure 4 This is a schematic diagram of the three-dimensional structure of the second embodiment of the present utility model;

[0020] The accompanying drawings are for illustrative purposes only and are not to be construed as limitations on this patent. To better illustrate this embodiment, some components of the accompanying drawings may be omitted, enlarged, or reduced in size, and do not represent the actual dimensions of the product. For those skilled in the art, it is understandable that some well-known structures and their descriptions may be omitted from the accompanying drawings. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0022] Example 1:

[0023] like Figures 1-3 As shown, a device for allowing cubic boron nitride to undergo ventilation reaction comprises a rotary drive mechanism 4, a rotating drum 1, a frame 3, a heating device 5 and an oxidizing gas supply device 2.

[0024] The rotary drive mechanism 4 includes a motor 41 and two pairs of rotary support wheels 43 . The rotary support wheels 43 are symmetrically arranged on the frame 3 . The motor 41 is fixed on the frame 3 and connected to the corresponding rotary support wheels 43 through a transmission shaft 42 .

[0025] The drum 1 includes a drum body 11 , with a drum door 13 and a sealing plate 14 provided at both ends of the drum body 11 , an exhaust hole 12 provided at the center of the drum door 13 , and a shaft seal 15 provided at the center of the sealing plate 14 . The drum 1 is placed horizontally on two pairs of rotating support wheels 43 .

[0026] The heating method of the heating device 5 is resistance heating, and the heating element is a resistance wire, which is evenly arranged in a serpentine shape on the drum body 11.

[0027] The oxidizing gas supply device 2 includes a gas cylinder 22 and a gas pipe 21 . One end of the gas pipe 21 is connected to the drum through the shaft seal 15 , and the other end is connected to the gas cylinder 22 .

[0028] The shaft seal 15 can keep the air pipe 21 stationary when the drum 1 rotates and can prevent the gas in the drum from leaking. The shaft seal 15 is a prior art and will not be described in detail here.

[0029] The working process of this utility model is as follows:

[0030] The drum door 13 is opened, the material (cubic boron nitride) is placed in, and the door 13 is closed. The heating device 5 is turned on to maintain the temperature in the drum 1 at 350°C to 400°C. Then, the gas cylinder 22 is turned on to supply pure oxygen. Then, the motor 41 is energized, which drives the corresponding rotating support wheel 43 via the drive shaft 42. The rotating support wheel 43 drives the drum 1 to rotate, causing the material (cubic boron nitride) to tumble inside the drum 1 and fully react with the gas. After the reaction is complete, the material (cubic boron nitride) is cooled to room temperature and the purified material (cubic boron nitride) is removed.

[0031] Example 2:

[0032] like Figure 4 As shown, in the second embodiment, other structures remain unchanged, except that: it also includes a box body 6, the box body 6 is covered on the drum 1, and both ends of the drum 1 are open structures. The exhaust hole 12 is provided on the box body 6, and a box door 62 is provided at one end of the box body 6. The frame 3 is fixed to the bottom plate inside the box body 6, and the heating device 5 is arranged in a serpentine shape in the box body 6. The air pipe 21 is fixed on the box body 6 and extends into the drum 1. A plurality of air nozzles 23 are evenly arranged on the air pipe 21 in the drum 1.

[0033] By providing the box body 6, the air pipe 21 can be reliably fixed on the box body 6 and the use of wearing parts of the shaft seal 15 can be reduced. The air nozzle 23 can make the air flow organization more reasonable, the oxidizing gas evenly contacts the material, and the reaction is more complete.

[0034] The process: Open door 62, remove drum 1, place the material (cubic boron nitride) inside, and then place drum 1 on rotating support wheel 43. Turn on heating device 5 to maintain the temperature inside chamber 6 at 350°C to 400°C. Then, open gas cylinder 22 to supply oxidizing gas. Then, energize motor 41, which drives rotating support wheel 43 via drive shaft 42. Rotating support wheel 43 then rotates drum 1, causing the material to tumble inside the drum and fully react with the gas. After the reaction is complete, cool to room temperature and remove the purified material (cubic boron nitride).

[0035] The above embodiments are only used to illustrate rather than limit the technical solutions of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that the present invention can still be modified or replaced by equivalents. Any modification or partial replacement that does not depart from the spirit and scope of the present invention should be included in the scope of the claims of the present invention.

[0036] If words such as "first" and "second" are used in this document to limit components, those skilled in the art should know that the use of "first" and "second" is only for the convenience of describing the present invention and simplifying the description. Unless otherwise stated, the above words have no special meaning.

[0037] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be internal communication between two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0039] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

Claims

1. A device for aeration reaction of cubic boron nitride, characterized in that: The invention comprises a rotary drive mechanism (4), a rotating drum (1), a frame (3), a heating device (5) and an oxidizing gas supply device (2), wherein the rotary drive mechanism (4) is fixed on the frame (3), and the rotating drum (1) is placed horizontally and is in driving connection with the rotary drive mechanism (4); The oxidizing gas supply device (2) is in communication with the drum (1) and is used to provide the oxidizing gas required for the ventilation reaction of the material in the drum (1); The heating device (5) is used to provide the temperature required for the ventilation reaction of the material in the rotating drum (1).

2. The device for allowing cubic boron nitride to undergo ventilation reaction according to claim 1, wherein: The rotary drive mechanism (4) comprises a motor (41) and two pairs of rotary support wheels (43). The rotary support wheels (43) are symmetrically arranged on the frame (3) in a front-back and left-right manner. The motor (41) is fixed on the frame (3) and connected to the corresponding rotary support wheels (43) via a transmission shaft (42).

3. The device for allowing cubic boron nitride to undergo ventilation reaction according to claim 2, wherein: The drum (1) comprises a drum body (11), with a drum door (13) and a sealing plate (14) respectively provided at both ends of the drum body (11), an exhaust hole (12) provided at the center of the drum door (13), and a shaft seal (15) provided at the center of the sealing plate (14). The drum (1) is placed on two pairs of rotating support wheels (43) and is transmission-connected thereto.

4. The device for allowing cubic boron nitride to undergo ventilation reaction according to claim 3, wherein: The oxidizing gas supply device (2) comprises a gas cylinder (22) and a gas pipe (21). One end of the gas pipe (21) is connected to the drum (1) via a shaft seal (15), and the other end is connected to the gas cylinder (22).

5. The device for allowing cubic boron nitride to undergo ventilation reaction according to claim 1, wherein: The invention also includes a box (6), the box (6) is covered on the drum (1), the two ends of the drum (1) are open structures, the box (6) is provided with an exhaust hole (12), one end of the box (6) is provided with a box door (62), the frame (3) is fixed on the inner bottom plate of the box (6), the heating device (5) is arranged in the box (6), the oxidizing gas supply device (2) includes a gas cylinder (22) and a gas pipe (21), one end of the gas pipe (21) is connected to the gas cylinder (22), and the other end of the gas pipe (21) passes through the box (6) and extends into the drum (1), and a plurality of air nozzles (23) are evenly arranged on the gas pipe in the drum (1).

6. A device for allowing cubic boron nitride to undergo ventilation reaction according to any one of claims 1 to 5, characterized in that: The heating method of the heating device (5) is resistance heating, comprising a resistance wire heating element, wherein the resistance wire is evenly arranged in a serpentine shape.

Images