CBN micro powder purification treatment device

Abstract

The utility model provides a CBN micro powder purification treatment device which comprises a box body, a bearing table is arranged on the inner side of the box body in a sliding mode, a heating crucible is installed on the top of the bearing table, a shell is fixed to the top wall of the box body, a heating space can be jointly formed between the shell and the bearing table, and a waste heat recovery pipe is fixedly installed in the heating space. And one end of the waste heat recovery pipe is connected with a liquid injection pipe. According to the device, the waste heat recovery pipe is arranged and placed above the heating space, so that when the heating crucible boils and evaporates a solution in the heating crucible, a strong acid mixed solution to be added in the waste heat recovery pipe can be preheated through boiled and evaporated high-temperature steam; therefore, when the solution in the waste heat recovery pipe is added into the heating crucible, the temperature difference between the added strong acid mixed solution and the original solution in the heating crucible can be effectively reduced, and the temperature of the solution in the heating crucible can be quickly increased.

Description

Technical Field

[0001] This utility model relates to the field of CBN, and more specifically, to a CBN micro powder purification and treatment device. Background Technology

[0002] Cubic boron nitride (CBN) is a novel synthetic material developed in the 1950s. It possesses high hardness and good wear resistance, making it widely used in the machining industry. Cubic boron nitride polycrystalline form is a polycrystalline form of cubic boron nitride produced by sintering cubic boron nitride micropowder under high temperature and pressure in the presence of a binder. In practical applications, to ensure the quality of cubic boron nitride polycrystalline, the cubic boron nitride powder needs to undergo purification treatment to remove internal impurities.

[0003] Traditionally, the purification of cubic boron nitride powder requires boiling in a strong acid mixture, and this process needs to be repeated multiple times to ensure the purification effect. For example, Chinese Patent CN 206799168 U discloses a cubic boron nitride powder purification device, which includes a housing, a controller, a linear motor, and a temperature and humidity sensor. The controller is installed on the upper front side of the housing, the linear motor is installed at the bottom inside the housing, a lifting plate is installed on the shaft end of the linear motor, a sealing block is installed on the upper end of the lifting plate, an evaporation heater is installed on the upper end of the sealing block, a crucible is installed on the upper end of the evaporation heater, a drying heater is installed in the middle of the inner wall of the housing, a distilled water injection pipe is installed on one side of the upper inner wall of the housing, an anti-corrosion injection pipe is installed on the other side of the upper inner wall of the housing, and the temperature and humidity sensor is installed on the upper back side inside the housing. The beneficial effects are: it can achieve multiple boiling and drying purification processes for cubic boron nitride powder, adopts an integrated design, has a high degree of automation, good purification effect, and high efficiency.

[0004] In practical applications, the aforementioned cubic boron nitride powder purification device requires multiple additions of a strong acid mixture. Since the crucible is in a boiling state, the temperature of the solution inside the crucible decreases during the addition of the strong acid mixture, which prolongs the time required for re-boiling and evaporation. Therefore, we have made improvements and proposed a CBN micro powder purification device. Utility Model Content

[0005] The purpose of this invention is to provide a CBN micro powder purification device that solves the problem that existing CBN micro powder purification devices tend to cause a rapid drop in the internal temperature of the crucible when a new strong acid mixture is added.

[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0007] A CBN micro powder purification and treatment device includes a box body, a support platform slidably provided on the inner side of the box body, a heating crucible installed on the top of the support platform, a shell fixed to the top wall of the box body, the shell and the support platform together forming a heating space, a waste heat recovery pipe fixedly installed in the heating space, and a liquid injection pipe connected to one end of the waste heat recovery pipe.

[0008] As a preferred technical solution of this application, a heater is installed at the bottom of the support platform, which can heat the crucible.

[0009] As a preferred technical solution of this application, a lower sealing frame is fixed on the top of the support platform, and a high-temperature resistant sealing ring is embedded in the lower sealing frame;

[0010] The lower sealing frame is fixed at the bottom of the housing, corresponding to the lower sealing frame. The lower sealing frame and the upper sealing frame are in contact, which can improve the sealing effect on the heating space.

[0011] As a preferred technical solution of this application, a vent plate is fixed on the top of the box, which allows the pressurized gas in the heating space to be discharged to the outside.

[0012] As a preferred technical solution of this application, the bottom of the support platform is also fixed with an electric push rod connected to the bottom wall of the box, which can make the support platform slide along the height direction of the box under the action of the electric push rod.

[0013] As a preferred technical solution of this application, a dryer connected to the side wall of the box is also provided at the bottom of the support platform.

[0014] As a preferred technical solution of this application, inclined plates are fixed on both sides of the shell, and the waste heat recovery pipe is located between the two inclined plates;

[0015] The shell has a drainage groove at the bottom of the inclined plate, and a collection ring is fixed on the outside of the shell and communicates with the drainage groove. A drain pipe is connected to the collection ring.

[0016] As a preferred technical solution of this application, the bottom of the front of the box is movably connected to a box door.

[0017] As a preferred technical solution of this application, the waste heat recovery pipe includes a pipe body and a heat-conducting shell wrapped around the surface of the pipe body;

[0018] The heat-conducting pipe shell is made of aluminum oxide.

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0020] In the solution of this application: 1. By setting the waste heat recovery pipe and placing it above the heating space, when the solution inside the heating crucible is boiled and evaporated, the high-temperature steam from the boiling and evaporation can preheat the strong acid mixture to be added in the waste heat recovery pipe. Thus, when the solution in the waste heat recovery pipe is added to the heating crucible, the temperature difference between the added strong acid mixture and the original solution in the heating crucible can be effectively reduced, which is conducive to the rapid increase of the solution temperature in the heating crucible, meeting the requirements of boiling and evaporation, realizing the recovery and utilization of heat energy, and having higher practicality;

[0021] 2. By combining the inclined plate and the heating space, the evaporated air can be concentrated and guided during the heating of the crucible, so that it passes through the waste heat recovery pipe and is discharged to the outside through the vent plate. This facilitates the full heating of the waste heat recovery pipe by high-temperature steam and improves the recovery and utilization of heat energy. Attached Figure Description

[0022] Figure 1 The structural diagram provided in this application;

[0023] Figure 2 This is a partial structural schematic diagram of the CBN micro powder purification and treatment device of this application;

[0024] Figure 3 This is a cross-sectional view of the first morphology of the CBN micro powder purification and treatment device of this application;

[0025] Figure 4 This is a cross-sectional view of the second morphology of the CBN micro powder purification and treatment device of this application;

[0026] Figure 5 for Figure 3 Enlarged structural diagram at point A in the middle;

[0027] Figure 6 for Figure 4 Enlarged structural diagram at point B;

[0028] Figure 7 A schematic diagram of the waste heat recovery pipe structure of the CBN micro powder purification and treatment device provided in this application.

[0029] The diagram shows: 1. Box body; 2. Waste heat recovery pipe; 3. Electric push rod; 4. Dryer;

[0030] 11. Support platform; 12. Heating crucible; 13. Shell; 14. Heating space; 15. Heater; 16. Ventilation plate; 17. Door;

[0031] 110. Lower sealing frame; 111. High-temperature resistant sealing ring;

[0032] 130. Upper sealing frame; 132. Inclined plate; 133. Drainage groove; 134. Collection ring; 135. Drain pipe;

[0033] 21. Liquid injection tube; 22. Tube body; 23. Heat-conducting tube shell. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model 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 utility model.

[0035] Therefore, the following detailed description of the embodiments of this utility model is not intended to limit the scope of the claimed utility model, but merely to illustrate some embodiments of the utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0036] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0037] like Figures 1-7 As shown, a CBN micro powder purification and treatment device includes a housing 1. A support platform 11 is slidably provided on the inner side of the housing 1. A heating crucible 12 is installed on the top of the support platform 11. A shell 13 is fixed to the top wall of the housing 1. The shell 13 and the support platform 11 can jointly form a heating space 14. A waste heat recovery pipe 2 is fixedly installed in the heating space 14. One end of the waste heat recovery pipe 2 is connected to a liquid injection pipe 21. In this embodiment, both the waste heat recovery pipe 2 and the liquid injection pipe 21 are made of corrosion-resistant and high-temperature resistant materials.

[0038] A heater 15 is installed at the bottom of the support platform 11. The heater 15 itself can regulate the heating temperature, and the heating crucible 12 can be heated by the heater 15.

[0039] The heating crucible 12 is used to hold the CBN micro powder (cubic boron nitride powder) to be purified. The heating crucible 12 is then heated by the heater 15. Before heating, a strong acid mixture is added to the waste heat recovery pipe 2 through the liquid injection pipe 21. The strong acid mixture is then fed into the heating crucible 12 through the tail end of the waste heat recovery pipe 2. The heater 15 then heats the heating crucible 12. During the heating process, the solution in the heating crucible 12 boils and evaporates. In this process, the boiling high-temperature steam is discharged upward and contacts the surface of the waste heat recovery pipe 2. The waste heat recovery pipe 2 can absorb the temperature of the high-temperature steam, thereby preheating the strong acid mixture to be added and thus realizing the recovery of heat energy. At the same time, it can reduce the temperature difference between the strong acid mixture to be added and the solution in the heating crucible 12, which is conducive to the rapid increase of the temperature of the solution in the heating crucible 12 after the mixture is added, thereby improving the efficiency of boiling evaporation.

[0040] A lower sealing frame 110 is fixed to the top of the support platform 11, and a high-temperature resistant sealing ring 111 is embedded in the lower sealing frame 110. An upper sealing frame 130 is fixed to the bottom of the housing 13 at the position corresponding to the lower sealing frame 110. The lower sealing frame 110 and the upper sealing frame 130 are in contact, which can improve the sealing effect on the heating space 14.

[0041] like Figure 2 and Figure 3 As shown, the state at this time is the heating state of the heating crucible 12. In this state, the lower sealing frame 110 of the support platform 11 contacts the corresponding upper sealing frame 130, and with the setting of the high temperature sealing ring 111, the connection is effectively sealed, which can avoid the constant heating in the heating space 14.

[0042] The top of the housing 1 is fixed with a vent plate 16. The vent plate 16 allows the pressurized gas in the heating space 14 to be discharged to the outside. Through the design of the vent plate 16, when the pressure in the heating space 14 increases, the excess pressurized air can be discharged to the outside of the housing 1 through the vent plate 16, thereby maintaining the pressure balance in the heating cavity 14 and avoiding excessive pressure.

[0043] The bottom of the front of the box 1 is movably connected to the box door 17, and a dryer 4 connected to the side wall of the box 1 is also provided at the bottom of the support platform 11.

[0044] The bottom of the support platform 11 is also fixed with an electric push rod 3 connected to the bottom wall of the box 1. The support platform 11 can slide along the height direction of the box 1 under the action of the electric push rod 3. After the CBN micro powder in the heating crucible 12 has been repeatedly added with strong acid mixture, the CBN micro powder can be boiled and purified. After purification, distilled water can be added to the heating crucible 12. After the distilled water is added, the heater 15 continues to heat until the water evaporates.

[0045] At this point, the electric push rod 3 is retracted, causing the support platform 11 to form as shown. Figure 4 In the state shown, the support platform 11 moves the heating crucible 12 away from the heating space 14. At this time, the heating crucible 12 can be dried by starting the dryer 4. After drying, the processed CBN micro powder can be taken out by opening the box door 17.

[0046] Inclined plates 132 are fixed on both sides of the shell 13. The waste heat recovery pipe 2 is located between the two inclined plates 132. A drainage groove 133 is opened on the surface of the shell 13 at the bottom position corresponding to the inclined plate 132. A collection ring 134 is fixed on the outside of the shell 13 and communicates with the drainage groove 133. A drain pipe 135 is connected to the collection ring 134.

[0047] The design of the two inclined plates 132 allows the high-temperature steam from the boiling state of the heating crucible 12 to be concentrated around the surface of the waste heat recovery tube 2, thus enabling better high-temperature heat exchange.

[0048] Meanwhile, the distilled water generated on the outer surface of the inclined plate 132 and the side wall of the shell 13 can be guided by the inclined plate 132 and finally guided into the collection ring 134 through the drainage groove 133, and finally discharged through the drain pipe 135 for unified treatment.

[0049] The waste heat recovery pipe 2 includes a pipe body 22 and a heat-conducting shell 23 wrapped around the surface of the pipe body 22. The heat-conducting shell 23 is made of aluminum oxide. Through the aluminum heat-conducting shell 23, the heat of the external high-temperature steam can be well transferred and absorbed, and the heat exchange with the strong acid mixture in the pipe body 22 can be effectively carried out to achieve a better preheating effect. In this embodiment, the pipe body 22 is made of corrosion-resistant and high-temperature resistant aluminum oxide.

Claims

1. A CBN micro powder purification and treatment device, characterized in that, The enclosure includes a housing (1), a support platform (11) is slidably provided on the inner side of the housing (1), a heating crucible (12) is installed on the top of the support platform (11), a shell (13) is fixed on the top wall of the housing (1), the shell (13) and the support platform (11) can jointly form a heating space (14), a waste heat recovery pipe (2) is fixedly installed in the heating space (14), and one end of the waste heat recovery pipe (2) is connected to a liquid injection pipe (21).

2. The CBN micro powder purification and treatment device according to claim 1, characterized in that, A heater (15) is installed at the bottom of the support platform (11), and the heating crucible (12) can be heated by the heater (15).

3. The CBN micro powder purification and treatment device according to claim 1, characterized in that, The top of the support platform (11) is fixed with a lower sealing frame (110), and a high-temperature resistant sealing ring (111) is embedded in the lower sealing frame (110); The bottom of the housing (13) is fixed with an upper sealing frame (130) at the position corresponding to the lower sealing frame (110). The lower sealing frame (110) and the upper sealing frame (130) are in contact, which can improve the sealing effect on the heating space (14).

4. The CBN micro powder purification and treatment device according to claim 1, characterized in that, The top of the box (1) is fixed with a vent plate (16), which allows the pressurized gas in the heating space (14) to be discharged to the outside by the action of the vent plate (16).

5. The CBN micro powder purification and treatment device according to claim 1, characterized in that, The bottom of the support platform (11) is also fixed with an electric push rod (3) connected to the bottom wall of the box (1). The support platform (11) can slide along the height direction of the box (1) under the action of the electric push rod (3).

6. The CBN micro powder purification and treatment device according to claim 1, characterized in that, A dryer (4) connected to the side wall of the box (1) is also provided at the bottom of the support platform (11).

7. The CBN micro powder purification and treatment device according to claim 1, characterized in that, Both sides of the shell (13) are fixed with inclined plates (132), and the waste heat recovery pipe (2) is located between the two inclined plates (132); The shell (13) has a drainage groove (133) at the bottom of the inclined plate (132) on its surface. A collection ring (134) is fixed on the outside of the shell (13) and communicates with the drainage groove (133). A drain pipe (135) is connected to the collection ring (134).

8. The CBN micro powder purification and treatment device according to claim 1, characterized in that, The bottom of the front of the box (1) is movably connected to the box door (17).

9. The CBN micro powder purification and treatment device according to claim 1, characterized in that, The waste heat recovery pipe (2) includes a pipe body (22) and a heat-conducting shell (23) wrapped around the surface of the pipe body (22); The heat-conducting tube shell (23) is made of aluminum oxide.

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