Calcining furnace for preparing magnesium oxide

Abstract

The utility model relates to the technical field of magnesium oxide manufacturing, in particular to a calcining furnace for preparing magnesium oxide. The calcining furnace comprises a bottom frame, a combustion chamber is fixedly connected to the surface of the bottom frame, a furnace body is arranged in the combustion chamber, one end of the furnace body is fixedly connected with a main shaft, and the other end of the main shaft is fixedly connected with a feeding port. The main shaft and the feeding port are rotationally connected to a bearing seat of the bottom frame, a nitrogen tank is arranged on the side, close to the main shaft, of the bottom frame, and an electromagnetic valve is fixedly installed at the output end of the nitrogen tank. By opening the electromagnetic valve, the nitrogen tank outputs nitrogen to the air inlet head through the air inlet pipe, and the air inlet head outputs the nitrogen into the furnace body through the main shaft, so that the content of the nitrogen in the furnace body is reduced, oxidation reaction of magnesium oxide in the calcining process is avoided, the purity of the magnesium oxide is guaranteed, and the final quality of a product is further guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of magnesium oxide production, in particular to a calcining furnace for preparing magnesium oxide. Background Art

[0002] Magnesium oxide is an inorganic substance, an oxide of magnesium, and an ionic compound. It is a white solid at room temperature. Magnesium oxide exists in nature in the form of periclase and is the raw material for magnesium smelting. Magnesium oxide has high fire-resistant and insulating properties. It can be transformed into crystals after being burned at a high temperature of more than 1000°C, and it becomes dead-burned magnesium oxide (magnesia) or sintered magnesium oxide when the temperature rises to 1500-2000°C.

[0003] Under high temperature environment, magnesium oxide is easy to react with oxygen to form magnesium oxide. If the oxygen concentration in the furnace is high, the oxidation reaction may cause magnesium oxide products to contain magnesium oxide substances, reduce their purity, and ultimately reduce the quality of the product. Utility Model Content

[0004] The utility model aims to provide a calcining furnace for preparing magnesium oxide, so as to solve the problem in the above-mentioned background technology that the oxygen concentration in the furnace is high, the oxidation reaction may cause the magnesium oxide product to contain magnesium oxide substances, reduce its purity, and finally reduce the quality of the product.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solution: a calcining furnace for preparing magnesium oxide: comprising a base frame, a combustion chamber is fixedly connected to the surface of the base frame, a furnace body is arranged inside the combustion chamber, a main shaft is fixedly connected to one end of the furnace body, a feed port is fixedly connected to the other end of the main shaft, the main shaft and the feed port are both rotatably connected to a bearing seat of the base frame, a nitrogen tank is arranged on the side of the base frame close to the main shaft, a solenoid valve is fixedly installed on the output end of the nitrogen tank, an air inlet pipe is fixedly connected to the output end of the solenoid valve, and an air inlet pipe is fixedly connected to the end of the air inlet pipe away from the solenoid valve. Head, a screw tube is threadedly connected to the surface of the air intake head, a screw barrel is fixedly connected to the surface of the screw tube, a roller bearing is fixedly connected to the surface of the screw barrel, the inner ring of the roller bearing is fixedly connected to the surface of the main shaft, the outer ring of the roller bearing is fixedly connected to the positioning rod, the top of the combustion chamber is fixedly connected to a motor, a driving gear is fixedly connected to the output shaft of the motor, the motor drives the driving gear to rotate via the output shaft, a gear belt is transmission-connected to the surface of the driving gear, a gear ring is transmission-connected to the surface of the gear belt, and the gear ring is fixedly connected to the surface of the main shaft.

[0006] Preferably, the main shaft is connected to the interior of the combustion chamber, the nitrogen tank outputs nitrogen to the intake head through the intake pipe, the intake head outputs nitrogen to the interior of the furnace body through the main shaft, and the solenoid valve controls the output amount of nitrogen from the nitrogen tank.

[0007] Preferably, the surface of the air inlet head is provided with an external thread, the screw tube is threadedly connected to the external thread of the air inlet head, the outer ring of the roller bearing is provided with an external thread, and the screw barrel is threadedly connected to the external thread of the roller bearing.

[0008] Preferably, the screw barrel is fixedly mounted on the main shaft via a roller bearing, the screw barrel is fixedly mounted on the air inlet head via a screw tube, and the air inlet head and the main shaft are butted against each other via the screw barrel.

[0009] Preferably, the positioning rod is fixedly connected to a side of the outer ring of the roller bearing away from the screw barrel, and the positioning rod can limit the position of the outer ring of the roller bearing on the main shaft.

[0010] Preferably, the gear belt is meshed with the driving gear and the gear ring at the same time, and the driving gear drives the gear ring to rotate through the gear belt.

[0011] Preferably, the driving gear and the gear belt have the same diameter, and the gear ring drives the furnace body to rotate inside the combustion chamber through the main shaft.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. The calcining furnace opens the solenoid valve so that the nitrogen tank outputs nitrogen to the air inlet head through the air inlet pipe, and the air inlet head then outputs the nitrogen to the inside of the furnace body through the main shaft, thereby reducing the nitrogen content inside the furnace body, avoiding oxidation reaction of magnesium oxide during the calcination process, ensuring the purity of magnesium oxide, and thus ensuring the final quality of the product.

[0014] 2. The calcining furnace drives the driving gear to rotate through the output shaft of the motor, the driving gear drives the gear ring to rotate through the driving gear, the gear ring drives the main shaft to rotate on the base frame, the main shaft drives the furnace body to rotate inside the base frame, and the furnace body rotates to make the magnesium oxide calcined more evenly.

[0015] 3. The calcining furnace limits the outer ring of the roller bearing from rotating on the main shaft through the positioning rod, and rotates the screw tube on the surface of the air inlet head. While changing the position of the screw tube, the screw barrel rotates on the roller bearing. At this time, the screw barrel is fixedly installed on the outer ring of the roller bearing, and the screw tube is fixedly installed on the surface of the air inlet head. The air inlet head is connected to the surface of the main shaft through the rotation of the screw barrel, and the air inlet head is plugged into the inside of the main shaft. During the rotation of the main shaft, it will only drive the inner ring of the roller bearing to rotate, and will not affect the rotation of the air inlet head through the screw barrel, so that during the rotation of the main shaft, the air inlet head can still stably output nitrogen. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a front view stereoscopic schematic diagram of the structure of the utility model;

[0017] Figure 2 It is a three-dimensional schematic diagram of the structure of the utility model from the back;

[0018] Figure 3 It is a front view and cutaway perspective diagram of the structure of the utility model;

[0019] Figure 4 For this utility model Figure 1 A schematic diagram of the enlarged structure at A in the middle;

[0020] Figure 5 It is a back view, cutaway, and exploded perspective diagram of the main shaft connection structure of the utility model.

[0021] In the figure: 1. base frame; 11. combustion chamber; 12. furnace body; 13. main shaft; 14. feed port; 2. nitrogen tank; 21. solenoid valve; 22. air inlet pipe; 23. air inlet head; 24. screw tube; 25. screw barrel; 26. roller bearing; 27. positioning rod; 3. motor; 31. driving gear; 32. gear belt; 33. gear ring. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1-5 , an embodiment provided by the utility model:

[0024] A calcining furnace for preparing magnesium oxide: comprising a base frame 1, a combustion chamber 11 is fixedly connected to the surface of the base frame 1, a furnace body 12 is arranged inside the combustion chamber 11, a main shaft 13 is fixedly connected to one end of the furnace body 12, a feed port 14 is fixedly connected to the other end of the main shaft 13, the main shaft 13 and the feed port 14 are both rotatably connected to the bearing seat of the base frame 1, a nitrogen tank 2 is arranged on the side of the base frame 1 close to the main shaft 13, an electromagnetic valve 21 is fixedly installed at the output end of the nitrogen tank 2, an air intake pipe 22 is fixedly connected to the output end of the electromagnetic valve 21, an air intake head 23 is fixedly connected to the end of the air intake pipe 22 away from the electromagnetic valve 21, a spiral tube 24 is threadedly connected to the surface of the spiral tube 24, a screw barrel 25 is fixedly connected to the surface of the screw barrel 25 A roller bearing 26 is fixedly connected, the inner ring of the roller bearing 26 is fixedly connected to the surface of the main shaft 13, the outer ring of the roller bearing 26 is fixedly connected to the positioning rod 27, the top of the combustion chamber 11 is fixedly connected to the motor 3, the output shaft of the motor 3 is fixedly connected to the driving gear 31, the motor 3 drives the driving gear 31 to rotate through the output shaft, the surface of the driving gear 31 is transmission-connected with a gear belt 32, the surface of the gear belt 32 is transmission-connected with a gear ring 33, and the gear ring 33 is fixedly connected to the surface of the main shaft 13. During the process of calcining magnesium oxide, the calcining furnace transports a large amount of nitrogen into the furnace body 12 to reduce the oxygen content inside the furnace body 12, avoid the oxidation reaction of magnesium oxide with oxygen at high temperature, and ensure the calcination quality of magnesium oxide.

[0025] Furthermore, the main shaft 13 is connected to the interior of the combustion chamber 11, the nitrogen tank 2 outputs nitrogen to the intake head 23 through the intake pipe 22, and the intake head 23 outputs nitrogen to the interior of the furnace body 12 through the main shaft 13. The solenoid valve 21 controls the output amount of nitrogen from the nitrogen tank 2, thereby ensuring the nitrogen content inside the furnace body 12 and preventing the furnace body 12 from containing a large amount of oxygen.

[0026] Furthermore, an external thread is provided on the surface of the air inlet head 23, the screw tube 24 is threadedly connected to the external thread of the air inlet head 23, the outer ring of the roller bearing 26 is provided with an external thread, the screw barrel 25 is threadedly connected to the external thread of the roller bearing 26, the diameter of the screw barrel 25 is larger than the diameter of the screw tube 24, and the screw tube 24 and the screw barrel 25 will rotate synchronously.

[0027] Furthermore, the screw barrel 25 is fixedly mounted on the main shaft 13 through the roller bearing 26, and the screw barrel 25 is fixedly mounted on the air inlet head 23 through the screw tube 24. The air inlet head 23 and the main shaft 13 are connected via the screw barrel 25, so that the air inlet head 23 is inserted into the inside of the main shaft 13. The screw barrel 25 seals the inlet of the main shaft 13, so that the nitrogen output from the air inlet head 23 can only enter the inside of the furnace body 12 through the main shaft 13, thereby completing the output of nitrogen.

[0028] Furthermore, the positioning rod 27 is fixedly connected to the side of the outer ring of the roller bearing 26 away from the screw barrel 25. The positioning rod 27 can limit the position of the outer ring of the roller bearing 26 on the main shaft 13, thereby facilitating the rotation of the screw barrel 25 on the external thread of the roller bearing 26 and realizing the installation of the screw barrel 25 on the roller bearing 26.

[0029] Furthermore, the gear belt 32 is meshed with the driving gear 31 and the gear ring 33 at the same time. The driving gear 31 drives the gear ring 33 to rotate through the gear belt 32, and drives the main shaft 13 to rotate through the gear ring 33, so that the main shaft 13 can leave an opening to connect to the interior of the furnace body 12, thereby facilitating the delivery of nitrogen to the interior of the furnace body 12.

[0030] Furthermore, the driving gear 31 and the gear belt 32 have the same diameter, and the gear ring 33 drives the furnace body 12 to rotate inside the combustion chamber 11 through the main shaft 13. During the rotation of the furnace body 12, the magnesium oxide inside the furnace body 12 is calcined more evenly.

[0031] Working principle: The outer ring of the roller bearing 26 is limited to rotate on the main shaft 13 by the positioning rod 27, and the screw tube 24 is rotated on the surface of the air inlet head 23. While changing the position of the screw tube 24, the screw barrel 25 is rotated on the roller bearing 26. At this time, the screw barrel 25 is fixedly installed on the outer ring of the roller bearing 26, and the screw tube 24 is fixedly installed on the surface of the air inlet head 23. The air inlet head 23 is rotatably connected to the surface of the main shaft 13 through the screw barrel 25, and the air inlet head 23 is plugged into the inside of the main shaft 13. During the rotation of the main shaft 13, only the inner ring of the roller bearing 26 is driven to rotate, and the rotation of the air inlet head 23 is not affected by the screw barrel 25. The solenoid valve 21 is opened, and the nitrogen tank 2 will output nitrogen to the air inlet head 23 through the air inlet pipe 22. The air inlet head 23 then outputs nitrogen to the inside of the furnace body 12 through the main shaft 13, thereby reducing the nitrogen content inside the furnace body 12 and avoiding oxidation reaction of magnesium oxide during calcination.

[0032] The output shaft of the motor 3 drives the driving gear 31 to rotate, and the driving gear 31 drives the gear ring 33 to rotate through the driving gear 31, and the gear ring 33 drives the main shaft 13 to rotate on the base frame 1, and the main shaft 13 drives the furnace body 12 to rotate inside the base frame 1. The furnace body 12 rotates to make the magnesium oxide calcined more uniformly.

[0033] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A calcining furnace for preparing magnesium oxide, characterized in that: The invention comprises a base frame (1), a combustion chamber (11) is fixedly connected to the surface of the base frame (1), a furnace body (12) is arranged inside the combustion chamber (11), one end of the furnace body (12) is fixedly connected to a main shaft (13), the other end of the main shaft (13) is fixedly connected to a feed port (14), the main shaft (13) and the feed port (14) are both rotatably connected to a bearing seat of the base frame (1), a nitrogen tank (2) is arranged on a side of the base frame (1) close to the main shaft (13), an electromagnetic valve (21) is fixedly installed at the output end of the nitrogen tank (2), the output end of the electromagnetic valve (21) is fixedly connected to an air intake pipe (22), the end of the air intake pipe (22) away from the electromagnetic valve (21) is fixedly connected to an air intake head (23), and a threaded connection is arranged on the surface of the air intake head (23). A screw tube (24) is provided, a screw barrel (25) is fixedly connected to the surface of the screw tube (24), a roller bearing (26) is fixedly connected to the surface of the screw barrel (25), the inner ring of the roller bearing (26) is fixedly connected to the surface of the main shaft (13), the outer ring of the roller bearing (26) is fixedly connected to the positioning rod (27), the top of the combustion chamber (11) is fixedly connected to a motor (3), the output shaft of the motor (3) is fixedly connected to a driving gear (31), the motor (3) drives the driving gear (31) to rotate through the output shaft, the surface of the driving gear (31) is transmission-connected to a gear belt (32), the surface of the gear belt (32) is transmission-connected to a gear ring (33), and the gear ring (33) is fixedly connected to the surface of the main shaft (13).

2. A calcining furnace for preparing magnesium oxide according to claim 1, characterized in that: The main shaft (13) is connected to the interior of the combustion chamber (11); the nitrogen tank (2) outputs nitrogen to the intake head (23) through the intake pipe (22); the intake head (23) outputs nitrogen to the interior of the furnace body (12) through the main shaft (13); and the solenoid valve (21) controls the output amount of nitrogen from the nitrogen tank (2).

3. A calcining furnace for preparing magnesium oxide according to claim 1, characterized in that: The surface of the air inlet head (23) is provided with an external thread, the screw tube (24) is threadedly connected to the external thread of the air inlet head (23), the outer ring of the roller bearing (26) is provided with an external thread, and the screw barrel (25) is threadedly connected to the external thread of the roller bearing (26).

4. A calcining furnace for preparing magnesium oxide according to claim 3, characterized in that: The screw barrel (25) is fixedly mounted on the main shaft (13) via a roller bearing (26), and the screw barrel (25) is fixedly mounted on the air inlet head (23) via a screw tube (24), and the air inlet head (23) and the main shaft (13) are butt-jointed via the screw barrel (25).

5. A calcining furnace for preparing magnesium oxide according to claim 4, characterized in that: The positioning rod (27) is fixedly connected to a side of the outer ring of the roller bearing (26) away from the screw barrel (25), and the positioning rod (27) can limit the position of the outer ring of the roller bearing (26) on the main shaft (13).

6. A calcining furnace for preparing magnesium oxide according to claim 2, characterized in that: The gear belt (32) is meshed with the driving gear (31) and the gear ring (33) at the same time, and the driving gear (31) drives the gear ring (33) to rotate through the gear belt (32).

7. A calcining furnace for preparing magnesium oxide according to claim 6, characterized in that: The driving gear (31) and the gear belt (32) have the same diameter, and the gear ring (33) drives the furnace body (12) to rotate inside the combustion chamber (11) through the main shaft (13).

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