Vertical magnetizing roasting furnace

Abstract

The utility model discloses a vertical magnetizing roasting furnace which comprises a furnace body, the furnace body is a hollow cylinder, the upper end of the furnace body is communicated with a feeding bin, the lower end of the furnace body is communicated with a discharging hopper, the lower end of the discharging hopper is communicated with a speed regulation air locking discharging device, a discharging temperature measuring galvanic couple is arranged on the side wall of the discharging hopper, and a plurality of material temperature measuring galvanic couples are evenly arranged on the outer wall of the furnace body in the height direction. A combustion control unit is connected to the position, away from the material temperature measuring galvanic couple, of the outer wall of the furnace body, and a heat exchange unit is arranged in the furnace body and penetrates through the side wall of the furnace body to be connected with the combustion control unit. The vertical magnetizing roasting furnace solves the technical problems that in the prior art, a magnetizing roasting furnace is high in energy consumption and low in heat efficiency.

Description

Technical Field

[0001] The utility model belongs to the technical field of roasting equipment, in particular to a vertical magnetization roasting furnace. Background Art

[0002] The magnetization roasting process can convert iron oxide ores such as hematite into magnetite, thereby improving resource utilization. The key equipment is the magnetization roaster. Magnetization roasting is a process in which ore is heated and heat-treated under a specific controlled atmosphere. Its main purpose is to achieve a transformation in the chemical properties of the ore through the following steps, thereby enhancing the magnetism of the ore and facilitating the subsequent magnetic separation process. This process is particularly suitable for processing weakly magnetic iron ores, such as converting hematite into strongly magnetic magnetite. Commonly used magnetization roasting equipment in industry include rotary kilns and flash magnetization roasters. Although rotary kilns and flash magnetization roasters can accurately control the gas-solid exchange process and can effectively ensure the stability and consistency of product quality, there is still a technical problem of low roasting efficiency. Utility Model Content

[0003] The purpose of the utility model is to provide a vertical magnetized roasting furnace, which solves the technical problem of low roasting efficiency of the magnetized roasting furnace in the prior art.

[0004] The technical solution adopted by the present utility model is: a vertical magnetized roasting furnace, comprising a furnace body 5, the furnace body 5 is a hollow cylinder, the upper end of the furnace body 5 is connected to a feed bin 3, the lower end of the furnace body 5 is connected to a discharge hopper 4, the lower end of the discharge hopper 4 is connected to a speed-regulating and air-locking discharger 9, a discharge temperature measuring couple 10 is provided on the side wall of the discharge hopper 4, a plurality of material temperature measuring couples 7 are evenly provided on the outer wall of the furnace body 5 along the height direction, a combustion control unit 2 is connected to the outer wall of the furnace body 5 away from the material temperature measuring couples 7, a heat exchange unit 1 is provided in the furnace body 5, and the heat exchange unit 1 is connected to the combustion control unit 2 after passing through the side wall of the furnace body 5.

[0005] The characteristics of the present utility model are also that: the heat exchange unit 1 includes an insulating heat exchange column 101, which is coaxially arranged with the furnace body 5, and the insulating heat exchange column 101 is spirally wound with a high-temperature spiral heat exchange tube 102 near the outer wall of the feed bin 3, and the insulating heat exchange column 101 is spirally wound with a waste heat spiral heat exchange tube 103 near the outer wall of the discharge hopper 4, and the end of the high-temperature spiral heat exchange tube 102 away from the waste heat spiral heat exchange tube 103 passes through the side wall of the furnace body 5 and is connected to the flue gas purifier 8, and the end of the high-temperature spiral heat exchange tube 102 close to the waste heat spiral heat exchange tube 103 is connected to the combustion control unit 2, and the end of the waste heat spiral heat exchange tube 103 away from the high-temperature spiral heat exchange tube 102 passes through the side wall of the furnace body 5 and is connected to the speed regulating fan 11, and the end of the waste heat spiral heat exchange tube 103 close to the high-temperature spiral heat exchange tube 102 is connected to the combustion control unit 2.

[0006] The combustion control unit 2 includes a buffer heat-resistant tube 201, which passes through the side wall of the furnace body 5 and is connected to the high-temperature spiral heat exchange tube 102. A combustion temperature measuring couple 202 is connected to the side wall of the buffer heat-resistant tube 201, and the other end of the buffer heat-resistant tube 201 is connected to a flame detector 203. The flame detector 203 is connected to a burner 204. The burner 204 is connected to a pressure reducing device 207 through a first connecting pipe 12. A solenoid valve 206 is provided on the first connecting pipe 12. The other end of the pressure reducing device 207 is connected to a gas pipeline valve 205 through a second connecting pipe 13.

[0007] There are no less than three buffer heat-resistant tubes 201, combustion temperature measuring couples 202, flame detectors 203, burners 204, and material temperature measuring couples 7, which are arranged in parallel.

[0008] A controller 6 is provided on the outer wall of the furnace body 5 , and the controller 6 is electrically connected to the solenoid valve 206 , the material temperature measuring couple 7 , the combustion temperature measuring couple 202 , the discharge temperature measuring couple 10 , and the speed regulating fan 11 through wires.

[0009] The feed bin 3 is in the shape of a hollow inverted rounded table.

[0010] The discharge hopper 4 is in the shape of a hollow inverted cone.

[0011] The beneficial effects of the present invention are as follows: the combustion control unit in the present invention can accurately regulate the combustion process to ensure that the material is roasted at an appropriate temperature and oxygen concentration; the material temperature measuring couple monitors the temperature in real time to assist in adjusting the combustion parameters to ensure that the temperature of the material is optimal throughout the roasting process; and the discharge temperature measuring couple monitors the discharge temperature to ensure the completion of the material roasting and provide data reference for the roasting of the next batch of materials, thereby optimizing the roasting process as a whole and solving the technical problem of low roasting efficiency of the magnetized roasting furnace in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural diagram of a vertical magnetization roasting furnace.

[0013] In the figure, 1. heat exchange unit, 101. heat-insulating heat exchange column, 102. high-temperature spiral heat exchange tube, 103. waste heat spiral heat exchange tube, 2. combustion control unit, 201. buffer heat-resistant tube, 202. combustion temperature measuring couple, 203. flame detector, 204. burner, 205. gas pipeline valve, 206. solenoid valve, 207. pressure reducing device, 3. feed bin, 4. discharge hopper, 5. furnace body, 6. controller, 7. material temperature measuring couple, 8. flue gas purifier, 9. speed-regulating and air-locking discharger, 10. discharge temperature measuring couple, 11. speed-regulating fan, 12. first connecting pipe, 13. second connecting pipe. DETAILED DESCRIPTION

[0014] The present invention will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0015] like Figure 1As shown, the vertical magnetized roasting furnace includes a furnace body 5, which is installed vertically. The furnace body 5 is a hollow cylinder. The upper end of the furnace body 5 is connected to a feed bin 3, which is a hollow inverted round table. The lower end of the furnace body 5 is connected to a discharge hopper 4, which is a hollow inverted cone and has a discharge hole that passes through the upper and lower parts along the axial direction. The outside of the three parts is covered with high-temperature resistant heat-insulating material. The discharge hopper 4 is connected to a speed-regulating and air-locking discharger 9. A discharge temperature measuring couple 10 is provided on the side wall of the discharge hopper 4. The discharge temperature measuring couple can monitor the temperature of the material in the discharge process in real time to ensure that the material temperature is within a safe range. The outer wall of the furnace body 5 is evenly provided with a number of material temperature measuring couples along the height direction. 7. The outer wall of the furnace body 5 is connected to the combustion control unit 2 away from the material temperature measuring couple 7. A heat exchange unit 1 is provided in the furnace body 5. The heat exchange unit 1 passes through the side wall of the furnace body 5 and is connected to the combustion control unit 2. The heat exchange unit 1 includes an insulation heat exchange column 101. The insulation heat exchange column 101 is coaxially arranged with the furnace body 5. The insulation heat exchange column 101 is fixedly installed at the center. The insulation heat exchange column 101 is spirally wound with a high-temperature spiral heat exchange tube 102 near the outer wall of the feed bin 3. The insulation heat exchange column 101 is spirally wound with a waste heat spiral heat exchange tube 103 near the outer wall of the discharge hopper 4. The end of the high-temperature spiral heat exchange tube 102 away from the waste heat spiral heat exchange tube 103 passes through the side wall of the furnace body 5 and is connected to the flue gas. The purifier 8 is connected, the end of the high-temperature spiral heat exchange tube 102 close to the waste heat spiral heat exchange tube 103 is connected to the combustion control unit 2, the end of the waste heat spiral heat exchange tube 103 away from the high-temperature spiral heat exchange tube 102 passes through the side wall of the furnace body 5 and is connected to the speed regulating fan 11, the end of the waste heat spiral heat exchange tube 103 close to the high-temperature spiral heat exchange tube 102 is connected to the combustion control unit 2, the combustion control unit 2 includes a buffer heat-resistant tube 201, the buffer heat-resistant tube 201 passes through the side wall of the furnace body 5 and is connected to the high-temperature spiral heat exchange tube 102, a combustion temperature measuring couple 202 is connected to the side wall of the buffer heat-resistant tube 201, and the other end of the buffer heat-resistant tube 201 is connected to the flame detector 20 3. The flame detector 203 is connected to the burner 204, and the burner 204 is connected to the pressure reducing device 207 through the first connecting pipe 12. The first connecting pipe 12 is provided with a solenoid valve 206. The other end of the pressure reducing device 207 is connected to the gas pipeline valve 205 through the second connecting pipe 13. There are no less than three buffer heat-resistant tubes 201, combustion temperature measuring couples 202, flame detectors 203, burners 204, and material temperature measuring couples 7, which are arranged in parallel. A controller 6 is provided on the outer wall of the furnace body 5. The controller 6 is electrically connected to the solenoid valve 206, the material temperature measuring couple 7, the combustion temperature measuring couple 202, the discharge temperature measuring couple 10, and the speed regulating fan 11 through wires.The specific working process of the vertical magnetized roasting furnace of the utility model is as follows: The specific working process of the vertical magnetized roasting furnace of the utility model is as follows: First, add the material to be roasted into the feed bin 3 of the vertical magnetized roasting furnace until the material bin is full, then start the power supply of the vertical magnetized roasting furnace, open the gas pipeline valve 205, the solenoid valve 206, the pressure reducing device 207 in sequence, activate the material temperature measuring couple 7, turn on the speed regulating fan 11, then turn on the speed regulating lock air discharger 9, activate the combustion temperature measuring couple 202 and the discharger Thermocouple 10, start controller 6; open the gas pipeline valve 205, and adjust the pressure reducing device 207 until the pressure in the vertical magnetization roasting furnace is appropriate, finally ignite the burner 204, and the combustion temperature fed back to the controller 6 by the flame detector 203 controls the gas and air flow rate in the solenoid valve 206 to reach the working temperature of combustion and heating, check the material temperature measured by the material temperature measuring couple displayed on the controller 6 at any time, determine the appropriate speed of the speed lock discharger 9, and complete the entire magnetization operation.

[0016] Example 1

[0017] The vertical magnetized roasting furnace includes a furnace body 5, which is a hollow cylinder. The upper end of the furnace body 5 is connected to a feed bin 3, and the lower end of the furnace body 5 is connected to a discharge hopper 4. The discharge hopper 4 is connected to a speed-regulating and air-locking discharger 9. A discharge temperature measuring couple 10 is provided on the side wall of the discharge hopper 4. A plurality of material temperature measuring couples 7 are evenly provided on the outer wall of the furnace body 5 along the height direction. A combustion control unit 2 is connected to the outer wall of the furnace body 5 away from the material temperature measuring couple 7. A heat exchange unit 1 is provided in the furnace body 5. The heat exchange unit 1 passes through the side wall of the furnace body 5 and is connected to the combustion control unit 2.

[0018] Example 2

[0019] On the basis of Example 1, the heat exchange unit 1 includes an insulating heat exchange column 101, which is coaxially arranged with the furnace body 5. The insulating heat exchange column 101 is spirally wound with a high-temperature spiral heat exchange tube 102 near the outer wall of the feed bin 3, and the insulating heat exchange column 101 is spirally wound with a waste heat spiral heat exchange tube 103 near the outer wall of the discharge hopper 4. The end of the high-temperature spiral heat exchange tube 102 away from the waste heat spiral heat exchange tube 103 passes through the side wall of the furnace body 5 and is connected to the flue gas purifier 8. The end of the high-temperature spiral heat exchange tube 102 close to the waste heat spiral heat exchange tube 103 is connected to the combustion control unit 2. The end of the waste heat spiral heat exchange tube 103 away from the high-temperature spiral heat exchange tube 102 passes through the side wall of the furnace body 5 and is connected to the speed regulating fan 11. The end of the waste heat spiral heat exchange tube 103 close to the high-temperature spiral heat exchange tube 102 is connected to the combustion control unit 2.

[0020] The combustion control unit 2 includes a buffer heat-resistant tube 201, which passes through the side wall of the furnace body 5 and is connected to the high-temperature spiral heat exchange tube 102. A combustion temperature measuring couple 202 is connected to the side wall of the buffer heat-resistant tube 201, and the other end of the buffer heat-resistant tube 201 is connected to a flame detector 203. The flame detector 203 is connected to a burner 204. The burner 204 is connected to a pressure reducing device 207 through a first connecting pipe 12. A solenoid valve 206 is provided on the first connecting pipe 12. The other end of the pressure reducing device 207 is connected to a gas pipeline valve 205 through a second connecting pipe 13.

[0021] The buffer heat-resistant tube 201, the combustion temperature measuring couple 202, the flame detector 203, the burner 204, and the material temperature measuring couple 7 are all no less than three and are arranged in parallel.

[0022] A controller 6 is provided on the outer wall of the furnace body 5 , and the controller 6 is electrically connected to the solenoid valve 206 , the material temperature measuring couple 7 , the combustion temperature measuring couple 202 , the discharge temperature measuring couple 10 , and the speed regulating fan 11 through wires.

[0023] Example 3

[0024] On the basis of Example 2, the feed bin 3 is a hollow inverted frustum, and the discharge hopper 4 is a hollow inverted cone.

Claims

1. Vertical magnetization roasting furnace, characterized in that, The invention comprises a furnace body (5), wherein the furnace body (5) is a hollow cylinder, the upper end of the furnace body (5) is connected to a feed bin (3), the lower end of the furnace body (5) is connected to a discharge hopper (4), the lower end of the discharge hopper (4) is connected to a speed-regulating air-locking discharger (9), a discharge temperature measuring thermocouple (10) is provided on the side wall of the discharge hopper (4), a plurality of material temperature measuring thermocouples (7) are uniformly provided on the outer wall of the furnace body (5) along the height direction, a combustion control unit (2) is connected to the outer wall of the furnace body (5) away from the material temperature measuring thermocouples (7), a heat exchange unit (1) is provided in the furnace body (5), and the heat exchange unit (1) is connected to the combustion control unit (2) after passing through the side wall of the furnace body (5).

2. The vertical magnetization roasting furnace according to claim 1, characterized in that: The heat exchange unit (1) comprises a heat-insulating heat exchange column (101), the heat-insulating heat exchange column (101) is coaxially arranged with the furnace body (5), the heat-insulating heat exchange column (101) is spirally wound with a high-temperature spiral heat exchange tube (102) near the outer wall of the feed bin (3), the heat-insulating heat exchange column (101) is spirally wound with a waste heat spiral heat exchange tube (103) near the outer wall of the discharge hopper (4), and the end of the high-temperature spiral heat exchange tube (102) away from the waste heat spiral heat exchange tube (103) passes through the furnace body (5). The side wall of the furnace body (5) is connected to the flue gas purifier (8), the end of the high-temperature spiral heat exchange tube (102) close to the waste heat spiral heat exchange tube (103) is connected to the combustion control unit (2), the end of the waste heat spiral heat exchange tube (103) away from the high-temperature spiral heat exchange tube (102) passes through the side wall of the furnace body (5) and is connected to the speed regulating fan (11), and the end of the waste heat spiral heat exchange tube (103) close to the high-temperature spiral heat exchange tube (102) is connected to the combustion control unit (2).

3. The vertical magnetization roasting furnace according to claim 2, characterized in that: The combustion control unit (2) comprises a buffer heat-resistant tube (201), the buffer heat-resistant tube (201) passes through the side wall of the furnace body (5) and is connected to the high-temperature spiral heat exchange tube (102), a combustion temperature measuring couple (202) is connected to the side wall of the buffer heat-resistant tube (201), the other end of the buffer heat-resistant tube (201) is connected to a flame detector (203), the flame detector (203) is connected to a burner (204), the burner (204) is connected to a pressure reducing device (207) through a first connecting tube (12), the first connecting tube (12) is provided with a solenoid valve (206), and the other end of the pressure reducing device (207) is connected to a gas pipeline valve (205) through a second connecting tube (13).

4. The vertical magnetization roasting furnace according to claim 3, characterized in that: The buffer heat-resistant tube (201), combustion temperature measuring couple (202), flame detector (203), burner (204), and material temperature measuring couple (7) are all at least three and are arranged in parallel.

5. The vertical magnetization roasting furnace according to claim 4, characterized in that: A controller (6) is provided on the outer wall of the furnace body (5), and the controller (6) is electrically connected to the electromagnetic valve (206), the material temperature measuring couple (7), the combustion temperature measuring couple (202), the discharge temperature measuring couple (10), and the speed regulating fan (11) through electric wires.

6. The vertical magnetization roasting furnace according to claim 5, characterized in that: The feed bin (3) is in the form of a hollow inverted rounded table.

7. The vertical magnetization roasting furnace according to claim 6, characterized in that: The discharge hopper (4) is in the shape of a hollow inverted cone.

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