Vertical iron oxide atmosphere dynamic calcination furnace

Abstract

The utility model discloses a vertical formula iron oxide atmosphere dynamic calcining furnace, including vertical furnace body, the lower extreme of this vertical furnace body is provided with combustion chamber, the upper extreme of this combustion chamber is provided with heat conduction baffle, and the area above heat conduction baffle is set up as calcining chamber, and the upper extreme of this calcining chamber is open setting, the outer wall department of vertical furnace body still is installed with lifting mechanism, and the main shaft of lifting mechanism stretches out upward and is installed with lifting cover plate to the axle end of main shaft, lifting cover plate straddles the whole upper end opening of calcining chamber, and the upper end opening of calcining chamber is plugged up after the downward movement of lifting cover plate. The device can drive the calcining frame to rotate in the calcining chamber when the material in the calcining frame is calcined through the rotation mechanism setting, thereby driving the material in the calcining frame to rotate, and effectively improving the calcining effect and calcining quality.

Description

Technical Field

[0001] This utility model relates to the field of iron oxide calcining furnace technology, specifically a vertical iron oxide atmosphere dynamic calcining furnace. Background Technology

[0002] Iron oxide calcining furnaces are key equipment used for the calcination treatment of iron oxides (such as Fe2O3, Fe3O4, etc.). They mainly achieve crystal transformation, dehydration, purification, or modification of iron oxides through high-temperature calcination. Based on different dimensions such as structural form, heating method, and operation method, they can be classified into rotary kilns, vertical furnaces, fluidized bed furnaces, and box furnaces.

[0003] The working principle of existing vertical furnaces is mostly a cylindrical structure set from top to bottom. The material is calcined in the cylindrical vertical furnace. In the existing technology, on the one hand, the position of the iron oxide material in the furnace body cannot be moved, which will cause uneven temperature during calcination and affect the calcination effect; on the other hand, the heat conduction during calcination is also a problem to be solved, as the heat transferred from the combustion chamber to the calcination chamber is somewhat reduced.

[0004] Moreover, the calcination of iron oxide in the existing technology requires an atmosphere, which requires the introduction of oxygen or inert gas into the furnace. However, due to the need for sealing and other reasons, the vertical furnace in the existing technology is usually blocked when introducing gas into the interior, and cannot meet the requirements of atmosphere calcination well.

[0005] Furthermore, the material entry and exit in the existing vertical furnace are not reasonable enough. When the material enters the calcination chamber, it is relatively convenient to simply throw the material in from the top. However, after calcination, it is quite troublesome to remove the material from the calcination chamber. Moreover, the heat in the calcination chamber is very high, making it very difficult to operate.

[0006] Therefore, in order to solve the above problems, it is necessary to develop a vertical iron oxide atmosphere dynamic calcining furnace with a reasonable structure. Utility Model Content

[0007] The purpose of this invention is to address the shortcomings of existing technologies by providing a vertical dynamic calcining furnace for iron oxide atmosphere; the technical solution is as follows:

[0008] A vertical iron oxide atmosphere dynamic calcining furnace includes a vertical furnace body. A combustion chamber is provided at the lower end of the vertical furnace body, and a heat-conducting baffle is provided at the upper end of the combustion chamber. The area above the heat-conducting baffle is provided as a calcining chamber, and the upper end of the calcining chamber is open. A lifting mechanism is also installed on the outer wall of the vertical furnace body. The main shaft of the lifting mechanism extends upward and a lifting cover plate is installed at the shaft end. The lifting cover plate spans the entire upper opening of the calcining chamber. After the lifting cover plate moves downward, it seals the upper opening of the calcining chamber.

[0009] Furthermore, a rotating mechanism is installed on the lifting cover plate. The main shaft of the rotating mechanism extends downward and a calcining frame is installed at the shaft end. The external dimensions of the calcining frame are adapted to the inner diameter of the vertical furnace body. The calcining frame can be placed at the lower end of the calcining chamber as the lifting cover plate moves up and down. It can also rotate in the calcining chamber under the drive of the rotating mechanism, and the iron oxide to be calcined is placed in the calcining frame.

[0010] Furthermore, a burner assembly is provided in the combustion chamber, and the circumferential sidewall and lower sidewall of the combustion chamber are provided with a fire-resistant layer, while the upper end of the combustion chamber is not provided with a fire-resistant layer.

[0011] Furthermore, the combustion chamber is also equipped with a hinged door panel.

[0012] Furthermore, the lower end face of the lifting cover is provided with a sealing protrusion, the size of which is adapted to the size of the upper opening of the calcination chamber. When the lifting cover moves downward, the sealing protrusion is correspondingly embedded into the upper opening of the calcination chamber.

[0013] Furthermore, an atmosphere inlet pipe and an exhaust gas outlet pipe are also installed on the lifting cover plate; the atmosphere inlet pipe and the exhaust gas outlet pipe both extend into the calcination chamber through the sealing protrusion, and valve bodies are installed on the atmosphere inlet pipe and the exhaust gas outlet pipe.

[0014] Furthermore, the lifting mechanism on the outer wall of the vertical furnace body is provided with three evenly spaced lifting mechanisms.

[0015] Furthermore, the upper end of the frame wall of the calcining frame is provided with an inclined pointed structure, and a rotation gap is left between the frame wall of the calcining frame and the inner wall of the calcining chamber.

[0016] Furthermore, the calcining frame is also equipped with vertically upward heat-conducting columns, which are uniformly distributed circumferentially within the calcining frame.

[0017] Furthermore, both the calcination frame and the heat-conducting column are made of copper, a material that conducts heat easily.

[0018] Beneficial effects: This utility model has the following beneficial effects:

[0019] 1) This device, through its rotating mechanism, can drive the calcining frame to rotate within the calcining chamber when the material inside the calcining frame is being calcined, thereby driving the material inside the calcining frame to rotate, effectively improving the calcination effect and calcination quality;

[0020] 2) The lifting mechanism in this device can move the lifting cover plate up and down, thereby enabling the placement and removal of materials in the calcination frame. Whether it is placing materials before the start or removing materials after calcination, it is very convenient and quick.

[0021] 3) The cover plate of this device is equipped with sealing protrusions, which can effectively increase the sealing effect. It is also equipped with an atmosphere inlet pipe and an exhaust gas outlet pipe. Oxygen or inert gas can be introduced into the calcination chamber through the atmosphere inlet pipe to adjust the calcination atmosphere, while the exhaust gas outlet pipe can discharge exhaust gas. Both pipes are equipped with valves to control opening and closing. The structure is reasonable.

[0022] 4) The calcination frame of this device is equipped with a frame wall, and the upper end of the frame wall is equipped with an inclined structure. Firstly, the rotation speed of the calcination frame should not be too high to prevent the material from being thrown out of the calcination frame. Secondly, even if the material is thrown out of the calcination frame, because of the inclined structure, the material will eventually fall back into the calcination frame. The structure is reasonably designed.

[0023] 5) The calcination frame in this device is equipped with uniformly distributed heat-conducting columns. The heat-conducting columns are made of heat-conducting material, which can effectively increase the heat-conducting area. When the material rotates, it collides with the heat-conducting columns, which can also increase the temperature of the material and effectively improve the calcination effect. On the other hand, through the collision of the heat-conducting columns, the material is also easier to crush. Larger particles of material are crushed into smaller particles by collision, which can also effectively improve the calcination effect and quality. Attached Figure Description

[0024] Figure 1 This is a structural diagram of Embodiment 1 of the present utility model;

[0025] Figure 2 for Figure 1 AA view;

[0026] Figure 3 for Figure 1 BB view;

[0027] Figure 4 This is a diagram showing the upward movement position of the lifting cover plate of this utility model;

[0028] Figure 5 for Figure 4 C-direction view;

[0029] Figure 6 This is a diagram showing the location of the heat-conducting columns within the calcination frame in this utility model;

[0030] Figure 7 for Figure 6 Top view;

[0031] The components include: vertical furnace body 1; combustion chamber 2; heat-conducting baffle 3; calcination chamber 4; lifting mechanism 5; lifting cover plate 6; rotating mechanism 7; calcination frame 8; refractory layer 9; door panel 10; sealing protrusion 11; atmosphere inlet pipe 12; exhaust gas outlet pipe 13; valve body 14; tip structure 15; and heat-conducting column 16. Detailed Implementation

[0032] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments. These embodiments are implemented under the premise of the technical solution of the present invention. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention.

[0033] Example 1

[0034] like Figure 1 and Figure 4 As shown, this embodiment of a vertical iron oxide atmosphere dynamic calcining furnace includes a vertical furnace body 1. A combustion chamber 2 is provided at the lower end of the vertical furnace body 1, and a heat-conducting baffle 3 is provided at the upper end of the combustion chamber 2. The area above the heat-conducting baffle 3 is provided as a calcining chamber 4, and the upper end of the calcining chamber 4 is open. In this embodiment, a lifting mechanism 5 is also installed on the outer wall of the vertical furnace body 1. In this embodiment, the main shaft of the lifting mechanism 5 extends upward and a lifting cover plate 6 is installed at the shaft end. In this embodiment, the lifting cover plate 6 spans the entire upper opening of the calcining chamber 4. After the lifting cover plate 6 moves downward, it seals the upper opening of the calcining chamber 4.

[0035] Furthermore, a rotating mechanism 7 is also installed on the lifting cover plate 6 in this embodiment. The main shaft of the rotating mechanism 7 extends downward and a calcining frame 8 is installed at the shaft end. The external dimensions of the calcining frame 8 are adapted to the inner diameter of the vertical furnace body 1. The calcining frame 8 can be placed at the lower end of the calcining chamber 4 as the lifting cover plate 6 moves up and down, and can rotate in the calcining chamber 4 under the drive of the rotating mechanism 7. The iron oxide to be calcined is placed in the calcining frame 8.

[0036] like Figure 3 As shown, a burner assembly is provided in the combustion chamber 2 of this embodiment, and the circumferential sidewall and the lower sidewall of the combustion chamber 2 of this embodiment are provided with a fire-resistant layer 9, while the upper end of the combustion chamber 2 is not provided with a fire-resistant layer 9.

[0037] In this embodiment, the combustion chamber 2 is also provided with a hinged door panel 10.

[0038] like Figure 5 As shown, in this embodiment, the lower end face of the lifting cover plate 6 is also provided with a sealing protrusion 11. The size of the sealing protrusion 11 is adapted to the size of the upper opening of the calcining chamber 4. When the lifting cover plate 6 moves downward, the sealing protrusion 11 of this embodiment is correspondingly embedded into the upper opening of the calcining chamber 4.

[0039] In this embodiment, the lifting cover plate 6 is also equipped with an atmosphere inlet pipe 12 and an exhaust gas outlet pipe 13; in this embodiment, the atmosphere inlet pipe 12 and the exhaust gas outlet pipe 13 both pass through the sealing protrusion 11 and extend into the calcination chamber 4, and valve bodies 14 are installed on the atmosphere inlet pipe 12 and the exhaust gas outlet pipe 13.

[0040] like Figure 2 As shown, in this embodiment, the lifting mechanism 5 on the outer side wall of the vertical furnace body 1 is provided with three evenly spaced mechanisms.

[0041] like Figure 6 and Figure 7 As shown, in this embodiment, the upper end of the frame wall of the calcining frame 8 is provided with an inclined tip structure 15, and a rotation gap is left between the frame wall of the calcining frame 8 and the inner wall of the calcining chamber 4.

[0042] In this embodiment, a vertically upward heat-conducting column 16 is also installed inside the calcining frame 8. In this embodiment, the heat-conducting column 16 is evenly distributed in the circumference of the calcining frame 8.

[0043] In this embodiment, both the calcination frame 8 and the heat-conducting column 16 are made of copper, a material that conducts heat easily.

[0044] The specific working principle of this embodiment is as follows: Figure 1 and Figure 4 As shown, the technical solution of this application firstly raises the lifting cover plate to the top through the lifting mechanism during feeding. Correspondingly, the lifting cover plate drives the rotating mechanism and the calcining frame in the calcining chamber to rise. The key point is that the calcining frame rises to the upper opening position of the calcining chamber. At this time, the iron oxide material can be placed in the calcining frame. Then, the calcining frame is moved down to the bottom of the calcining chamber.

[0045] like Figure 1 As shown, when the calcining frame moves to the bottom of the calcining chamber, the sealing and venting on the lifting cover plate is also embedded into the upper opening of the calcining chamber, sealing the entire calcining chamber and ensuring the airtightness inside the calcining chamber. In this embodiment, a rotation gap is still left between the calcining frame and the inner wall of the calcining chamber to prevent damage to the calcining chamber when the calcining frame rotates.

[0046] Then the combustion chamber is opened, and the heat generated by the combustion in the combustion chamber is transferred upward through the heat-conducting baffle to the calcining frame. The calcining frame itself is also made of heat-conducting material. After the calcining frame heats up rapidly, it calcines the material inside the calcining frame. At the same time, the rotating mechanism on the lifting cover is opened, which drives the calcining frame to rotate in the calcining chamber, causing the material inside the calcining frame to rotate. The position of the material is not fixed, but moves relative to it, thus effectively increasing the calcination effect of the material.

[0047] Furthermore, during the calcination process, the lifting cover plate of this embodiment is equipped with sealing protrusions, which can effectively increase the sealing effect. It is also equipped with an atmosphere inlet pipe and an exhaust gas outlet pipe. Oxygen or inert gas can be introduced into the calcination chamber through the atmosphere inlet pipe to regulate the calcination atmosphere, while the exhaust gas outlet pipe can discharge exhaust gas accordingly. Both pipes are equipped with valves, which can be used to control the opening and closing of the valves. The structure is reasonable.

[0048] Furthermore, during the calcination process, the calcination frame is equipped with frame walls, and the upper end of the frame walls is equipped with an inclined structure. Firstly, the rotation speed of the calcination frame should not be too high to prevent the material from being thrown out of the calcination frame. Secondly, even if the material is thrown out of the calcination frame, because of the inclined structure, the material will eventually fall back into the calcination frame. The structure is reasonably designed.

[0049] In addition, the device is equipped with evenly distributed heat-conducting columns inside the calcination frame. The heat-conducting columns are made of heat-conducting material, which can effectively increase the heat-conducting area. When the material rotates, it collides with the heat-conducting columns, which can also increase the temperature of the material and effectively improve the calcination effect. On the other hand, the material is also easier to crush through the collision of the heat-conducting columns. Larger particles of material are crushed into smaller particles, which can also effectively improve the calcination effect and quality.

[0050] When the material inside needs to be removed after calcination, the lifting mechanism is used to raise the lifting cover plate upwards, which in turn moves the internal calcination frame upwards. Once the calcination frame is moved to the opening of the calcination chamber, the material can be removed. The overall structure is quite reasonable and convenient.

[0051] The above-described specific embodiments are merely preferred embodiments of this utility model and are not intended to limit the implementation of this utility model or the scope of the claims. All equivalent changes and modifications made in accordance with the scope of protection of this utility model patent application should be included within the scope of this utility model patent application.

Claims

1. A vertical dynamic calcining furnace for iron oxide atmosphere, characterized in that: The furnace includes a vertical furnace body (1), a combustion chamber (2) at the lower end of the furnace body (1), a heat-conducting baffle (3) at the upper end of the combustion chamber (2), and a calcination chamber (4) above the heat-conducting baffle (3). The upper end of the calcination chamber (4) is open. A lifting mechanism (5) is also installed on the outer wall of the vertical furnace body (1). The main shaft of the lifting mechanism (5) extends upward and a lifting cover plate (6) is installed at the shaft end of the main shaft. The lifting cover plate (6) spans the entire upper opening of the calcination chamber (4). After the lifting cover plate (6) moves downward, it seals the upper opening of the calcination chamber (4). Furthermore, a rotating mechanism (7) is installed on the lifting cover plate (6). The main shaft of the rotating mechanism (7) extends downward and a calcining frame (8) is installed at the shaft end. The external dimensions of the calcining frame (8) are adapted to the inner diameter of the vertical furnace body (1). The calcining frame (8) can be placed at the lower end of the calcining chamber (4) as the lifting cover plate (6) moves up and down. It can also rotate in the calcining chamber (4) under the drive of the rotating mechanism (7), and the iron oxide to be calcined is placed in the calcining frame (8).

2. The vertical iron oxide atmosphere dynamic calcining furnace according to claim 1, characterized in that: The combustion chamber (2) is provided with a burner assembly, and the circumferential sidewall and the lower sidewall of the combustion chamber (2) are provided with a fire-resistant layer (9), while the upper end of the combustion chamber (2) is not provided with a fire-resistant layer (9).

3. A vertical iron oxide atmosphere dynamic calcining furnace according to claim 2, characterized in that: The combustion chamber (2) is also provided with a hinged door panel (10).

4. A vertical iron oxide atmosphere dynamic calcining furnace according to claim 1, characterized in that: The lower end face of the lifting cover plate (6) is also provided with a sealing protrusion (11). The size of the sealing protrusion (11) is adapted to the size of the upper opening of the calcination chamber (4). When the lifting cover plate (6) moves downward, the sealing protrusion (11) is correspondingly embedded into the upper opening of the calcination chamber (4).

5. A vertical iron oxide atmosphere dynamic calcining furnace according to claim 4, characterized in that: The lifting cover plate (6) is also equipped with an atmosphere inlet pipe (12) and an exhaust gas outlet pipe (13); the atmosphere inlet pipe (12) and the exhaust gas outlet pipe (13) both pass through the sealing protrusion (11) and extend into the calcination chamber (4), and valve bodies (14) are installed on the atmosphere inlet pipe (12) and the exhaust gas outlet pipe (13).

6. A vertical iron oxide atmosphere dynamic calcining furnace according to claim 1, characterized in that: The vertical furnace body (1) has three evenly spaced lifting mechanisms (5) on its outer side wall.

7. A vertical iron oxide atmosphere dynamic calcining furnace according to claim 1, characterized in that: The upper end of the frame wall of the calcining frame (8) is provided with an inclined tip structure (15), and a rotation gap is left between the frame wall of the calcining frame (8) and the inner wall of the calcining chamber (4).

8. A vertical iron oxide atmosphere dynamic calcining furnace according to claim 7, characterized in that: The calcining frame (8) is also equipped with vertically upward heat-conducting columns (16), which are uniformly distributed in the circumference of the calcining frame (8).

9. A vertical iron oxide atmosphere dynamic calcining furnace according to claim 8, characterized in that: The calcination frame (8) and the heat-conducting column (16) are both made of copper, a material that is easy to conduct heat.

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