A high-temperature material cooling device

Abstract

The present invention discloses a high-temperature material cooling device, which relates to the field of cooling of high-temperature materials for magnetization roasting and direct reduction materials of ore materials such as hematite, siderite, limonite, high-iron bauxite, red mud, etc., and other non-contact high-temperature materials. It includes a cylinder body and a cooling unit. The cooling unit includes a basic cooling module and an enhanced cooling module. The basic cooling module is of a hollow shaft rod structure and is arranged along the axial direction of the cylinder body. The enhanced cooling module is provided with a cooling cavity. One end of the enhanced cooling module is connected to the basic cooling module, and the other end extends radially outward. The cooling cavity is communicated with the hollow shaft rod. The high-temperature material cooling device provided by the present invention can achieve non-contact cooling of the cooling medium and the high-temperature material, has high cooling efficiency, and can be applicable to various different types of high-temperature materials, especially high-temperature reduction magnetization roasting materials that need to prevent oxidation.

Description

Technical Field

[0001] The present invention relates to the field of cooling of high-temperature materials such as magnetized roasting high-temperature materials, direct reduction materials, and other non-contact high-temperature materials of ore materials such as hematite, siderite, limonite, high-iron bauxite, and red mud, and specifically relates to a high-temperature material cooling device. Background Art

[0002] China is rich in mineral resources, but there are many lean ores and few rich ores, especially the resources of complex refractory iron ores and high-iron bauxite ores are huge. Magnetized roasting is an effective technology for treating materials such as complex refractory iron ores, high-iron bauxite ores, and red mud. Due to the fine roasting particle size of magnetized roasting, it is easy to be oxidized when contacting air during the cooling process, which has become one of the problems of magnetized roasting.

[0003] After magnetized roasting, the temperature of the materials is mostly in the range of 500 - 800°C. When air is directly introduced at this temperature, secondary oxidation is likely to occur. For some magnetized roasting products, they are directly flowed into water for quenching cooling. Although the magnetism of the products can be better guaranteed, a large amount of heat is lost, resulting in too high roasting costs.

[0004] For the patent "A High-Temperature Ore Powder Cooling Device (201310330215.5)", due to the too short contact time between the high-temperature ore powder and the heat exchange water pipe, the cooling effect on the magnetized roasting products is not good. This way causes part of the waste heat to be unable to be recycled, and part of the circulating cooling water is also wasted during the cooling process. Generally, for every 1 ton of refractory iron ore processed, there will be heat equivalent to 15 - 25 kg of standard coal that cannot be recycled, and about 30 - 70 kg of circulating cooling water will be evaporated and lost during this process.

[0005] For the patent "A Suspension Cooling System (201510096793.6)", air is used to quickly exchange heat with the materials to achieve the cooling effect. However, during the rapid heat exchange process between air and the materials, it is inevitable that some of the roasted products will undergo secondary oxidation, resulting in a decrease in the magnetism of the roasted products. Summary of the Invention

[0006] The purpose of the present invention is: aiming at the above problems, the present invention provides a high-temperature material cooling device, which can realize non-contact cooling of the cooling medium and high-temperature materials, has high cooling efficiency, and can be applicable to various different types of high-temperature materials, especially high-temperature reduction magnetized roasting materials that need to prevent oxidation.

[0007] The technical solution adopted by the present invention is as follows:

[0008] A high-temperature material cooling device, comprising a cylinder body and a cooling unit. The cooling unit includes a basic cooling module and an enhanced cooling module. The basic cooling module is a hollow shaft rod structure and is arranged along the axial direction of the cylinder body. The enhanced cooling module is provided with a cooling cavity. One end of the enhanced cooling module is connected to the basic cooling module, and the other end extends radially outward. The cooling cavity is communicated with the hollow shaft rod. A first driving device capable of driving the basic cooling module to rotate is provided on the basic cooling module. Cooling medium inlets and cooling medium outlets communicated with the hollow shaft rod are respectively provided at both axial ends of the basic cooling module. A sealing structure A is sleeved outside the joints of the basic cooling module with the cooling medium inlets and outlets. The sealing structure A is rotatably connected to the basic cooling module and fixedly connected to the cooling medium inlets, outlets and the cylinder body. Feed ports and discharge ports are respectively provided at both ends of the cylinder body. The feed port is matched with the end where the cooling medium outlet is located, and the discharge port is matched with the end where the cooling medium inlet is located.

[0009] Further, the enhanced cooling module is a spiral structure, and the spiral direction of the spiral structure is matched with the direction of material transportation.

[0010] Further, the cylinder body includes two support parts and a rotating part. The rotating part is arranged between the two support parts and is rotatably connected to the two support parts. A sealing structure B is provided at the joint of the support part and the rotating part. The sealing structure B is rotatably connected to the rotating part and fixedly connected to the support part. A second driving device for driving the rotating part to rotate is provided on the rotating part. The feed port and the discharge port are respectively provided on the support parts at both ends of the rotating part.

[0011] Further, a plurality of baffle plates are arranged along the axial direction at the inner wall of the rotating part.

[0012] Further, temperature measuring devices are respectively provided at the feed port and the discharge port.

[0013] Further, the temperature measuring devices are electrically connected to a control device. The control device is electrically connected to the first driving device and the second driving device. A material temperature signal is transmitted between the temperature measuring devices and the control device, and control signals are respectively transmitted between the first driving device, the second driving device and the control device.

[0014] Further, the first driving device includes a first motor and a first transmission mechanism. The first motor is connected to the enhanced cooling module through the first transmission mechanism. The second driving device includes a second motor and a second transmission mechanism. The second motor is connected to the rotating part through the second transmission mechanism. Both the first motor and the second motor are frequency conversion motors.

[0015] Further, a heat recovery device is connected to the cooling medium outlet.

[0016] Further, air-lock devices are respectively arranged at the feed inlet and the discharge outlet.

[0017] Further, a plurality of the cooling units are circumferentially and uniformly distributed inside the cylinder.

[0018] In summary, due to the adoption of the above technical solutions, the beneficial effects of the present invention are as follows: Through the non-contact cooling method of the cooling medium and the high-temperature material, it can be applied to a variety of different types of high-temperature materials, especially the high-temperature reduced magnetization roasting materials that need to prevent oxidation. The basic cooling module and the enhanced cooling module cooperate to promote, stir and cool the material; setting the enhanced cooling module can effectively increase the heat exchange area and provide a better cooling effect; the feed inlet corresponds to the cooling medium outlet, and the discharge outlet corresponds to the cooling medium inlet to ensure the formation of a uniform temperature gradient along the axial direction inside the cylinder, avoiding the material near the discharge outlet from being unable to be effectively cooled; the rotating part can rotate to stir the material more fully, and the baffle plate on the rotating part can drive the bottom material, so that the bottom material moves with the baffle plate to avoid material deposition at the bottom and ensure uniform cooling; after the cooling medium cools the material, it can enter the heat recovery device for waste heat recovery; the control device can adjust the frequencies of the first motor and the second motor according to the material temperature signal collected by the temperature measuring device to control the processing amount of the material and the temperature of the material at the discharge outlet; the number of cooling units can be set according to the specific working conditions and the amount of material to ensure uniform cooling of the material inside the cylinder and improve the cooling efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is the overall structure diagram of the present invention;

[0020] Figure 2 is the sectional view of the rotating part of the present invention.

[0021] Reference numerals in the drawings: 1 - basic cooling module, 101 - cooling cavity, 2 - enhanced cooling module, 3 - first driving device, 4 - cooling medium inlet, 5 - cooling medium outlet, 6 - sealing structure A, 7 - cylinder, 701 - supporting part, 702 - rotating part, 8 - sealing structure B, 9 - second driving device, 10 - baffle plate, 11 - feed inlet, 12 - discharge outlet. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The present invention will be described in detail below with reference to the drawings.

[0023] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0024] Embodiment 1

[0025] A high-temperature material cooling device, such as Figure 1-2 shown, includes a cylinder body 7 and a cooling unit. The cooling unit includes a basic cooling module 1 and an enhanced cooling module 2. The basic cooling module 1 is a hollow shaft structure and is arranged along the axial direction of the cylinder body 7. The enhanced cooling module 2 is provided with a cooling cavity 101. One end of the enhanced cooling module 2 is connected to the basic cooling module 1, and the other end extends radially outward. The cooling cavity 101 is communicated with the hollow shaft. A first driving device 3 is provided on the basic cooling module 1 to drive the basic cooling module 1 to rotate. Cooling medium inlets 4 and cooling medium outlets 5 communicated with the hollow shaft are respectively provided at both axial ends of the basic cooling module 1. A sealing structure A6 is sleeved outside the connection parts of the basic cooling module 1 with the cooling medium inlet 4 and the cooling medium outlet 5. The sealing structure A6 is rotatably connected to the basic cooling module 1 and fixedly connected to the cooling medium inlet 4, the cooling medium outlet 5 and the cylinder body 7. Feed inlets 11 and discharge outlets 12 are respectively provided at both ends of the cylinder body 7. The feed inlet 11 is matched with the end where the cooling medium outlet 5 is located, and the discharge outlet 12 is matched with the end where the cooling medium inlet 4 is located.

[0026] The enhanced cooling module 2 is a spiral structure, and the spiral direction of the spiral structure is matched with the direction of material transportation.

[0027] The cylinder body 7 includes two support parts 701 and a rotating part 702. The rotating part 702 is arranged between the two support parts 701 and is rotatably connected to the two support parts 701. A sealing structure B8 is provided at the joint of the support part 701 and the rotating part 702. The sealing structure B8 is rotatably connected to the rotating part 702 and fixedly connected to the support part 701. A second driving device 9 for driving the rotating part 702 to rotate is provided on the rotating part 702. The feed inlets 11 and the discharge outlets 12 are respectively provided on the support parts 701 at both ends of the rotating part 702.

[0028] A plurality of baffle plates 10 are arranged along the axial direction at the inner wall of the rotating part 702.

[0029] Temperature measuring devices are respectively provided at the feed inlets 11 and the discharge outlets 12. The temperature measuring devices are electrically connected to a control device. The control device is electrically connected to the first driving device 3 and the second driving device 9. A material temperature signal is transmitted between the temperature measuring devices and the control device, and control signals are respectively transmitted between the first driving device 3 and the second driving device 9 and the control device.

[0030] The first driving device 3 includes a first motor and a first transmission mechanism, and the first motor is connected to the enhanced cooling module 2 through the first transmission mechanism; the second driving device 9 includes a second motor and a second transmission mechanism, and the second motor is connected to the rotating part 702 through the second transmission mechanism; both the first motor and the second motor are variable-frequency motors.

[0031] A heat recovery device is connected to the cooling medium outlet 5.

[0032] Air lock devices are respectively arranged at the feed inlet 11 and the discharge outlet 12.

[0033] The two cooling units are circumferentially and evenly distributed in the cylinder 7. The number of cooling units can be set according to the specific working conditions and the amount of materials to ensure uniform cooling of the materials in the cylinder 7 and improve the cooling efficiency.

[0034] Specifically, the non-contact cooling method of the cooling medium and the high-temperature material can be applied to various different types of high-temperature materials, especially the high-temperature reduced magnetization roasting materials that need to prevent oxidation. The basic cooling module 1 cooperates with the enhanced cooling module 2 to promote, stir and cool the materials; setting the enhanced cooling module 2 can effectively increase the heat exchange area and provide a better cooling effect; the feed inlet 11 corresponds to the cooling medium outlet 5, and the discharge outlet 12 corresponds to the cooling medium inlet 4 to ensure the formation of a uniform temperature gradient in the axial direction in the cylinder 7 and avoid the materials near the discharge outlet 12 from being unable to be effectively cooled; the rotating part 702 can rotate to stir the materials more fully, and the baffle plate 10 on the rotating part 702 can drive the bottom materials, so that the bottom materials move with the baffle plate 10 to avoid material deposition at the bottom and ensure uniform cooling; after the cooling medium cools the materials, it can enter the heat recovery device for waste heat recovery; the control device can adjust the frequencies of the first motor and the second motor according to the material temperature signals collected by the temperature measuring device to control the processing amount of the materials and the temperature of the discharge outlet 12 of the materials. Under normal circumstances, the material temperature at the feed inlet 11 is 500 - 1200 °C, and the material temperature at the discharge outlet 12 is 50 - 300 °C.

[0035] Preferably, the cooling unit is made of a high-temperature resistant and high-thermal conductivity material, for example, silicon carbide plate, etc.; the cylinder can be made of a high-temperature resistant and high-thermal conductivity material to accelerate the cooling of the materials, or made of a heat-insulating material to improve the utilization rate of heat.

[0036] Embodiment 2

[0037] The total iron content of a certain hematite is 41.25%, and the content of magnetic iron is only 0.62%. It is necessary to carry out magnetic separation after high-temperature magnetization roasting to improve its iron grade. In order to maintain a higher magnetic susceptibility and prevent contact with air for the high-temperature material after magnetization, this high-temperature material cooling equipment is adopted. The rotational speed of the first motor is 35HZ, and the rotational speed of the second motor is 40HZ. Cooling water is passed through the cooling medium inlet 4 as the cooling medium, and the flow rate of the cooling water is 2m / s. After being detected by the temperature measuring device, the temperature of the material at the feed inlet 11 reaches 700°C. After being cooled by this high-temperature material cooling equipment, the temperature of the material at the discharge outlet 12 is 100°C, and the magnetic susceptibility of the final material reaches 95%.

[0038] Example 3

[0039] A certain high-grade iron concentrate (total iron grade 67.5%) is used to prepare high-purity iron powder by the high-temperature direct reduction process. In order to prevent the iron powder after direct reduction from contacting with air and oxidizing, and to prevent oxidation reaction from still occurring after directly using water cooling and reducing the quality of the iron powder, this high-temperature material cooling equipment can prevent the iron concentrate after direct reduction from oxidizing. The rotational speed of the first motor is 35HZ, the rotational speed of the second motor is 40HZ, and the flow rate of the cooling water is 2m / s. The temperature of the material at the feed inlet 11 reaches 1000°C. After being cooled by this high-temperature material cooling equipment, the temperature of the material at the discharge outlet 12 is reduced to 200°C.

[0040] Example 3

[0041] A certain high-iron bauxite (total iron grade 32%) adopts the process of magnetic separation for iron removal after high-temperature reduction magnetization roasting. In order to maintain a higher magnetic susceptibility and prevent contact with air for the high-temperature material after magnetization, this high-temperature material cooling equipment is adopted. The rotational speed of the first motor is 35HZ, the rotational speed of the second motor is 40HZ, and the flow rate of the cooling water is 2m / s. The temperature of the material at the feed inlet 11 reaches 800°C. After being cooled by this high-temperature material cooling equipment, the temperature of the material at the discharge outlet 12 is reduced to 200°C.

[0042] In this article, specific examples are used to elaborate on the principle and implementation method of the present invention. The description of the above examples is only used to help understand the method of the present invention and its core idea. It should be noted that for those of ordinary skill in the art of this technology, without departing from the principle of the present invention, several improvements and modifications can still be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

[0043] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present invention is usually placed during use. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 construed as a limitation to the present invention.

Claims

1. A high-temperature material cooling device, comprising a cylinder body and a cooling unit, characterized in that, The cooling unit includes a basic cooling module and an enhanced cooling module; the basic cooling module is a hollow shaft structure and is arranged along the axial direction of the cylinder body; the enhanced cooling module is provided with a cooling cavity, one end of the enhanced cooling module is connected to the basic cooling module, and the other end extends radially outward, and the cooling cavity is communicated with the hollow shaft; a first driving device for driving the basic cooling module to rotate is provided on the basic cooling module, cooling medium inlets and cooling medium outlets communicated with the hollow shaft are respectively arranged at both axial ends of the basic cooling module, and a sealing structure A is sleeved outside the joints of the basic cooling module with the cooling medium inlets and outlets, and the sealing structure A is rotatably connected to the basic cooling module and fixedly connected to the cooling medium inlets, outlets and the cylinder body; a feed inlet and a discharge outlet are respectively arranged at both ends of the cylinder body, the feed inlet is matched with the end where the cooling medium outlet is located, and the discharge outlet is matched with the end where the cooling medium inlet is located; the enhanced cooling module is a spiral structure, and the spiral direction of the spiral structure is matched with the direction of material transportation; the cylinder body includes two supporting parts and a rotating part, the rotating part is arranged between the two supporting parts and is rotatably connected to the two supporting parts, a sealing structure B is arranged at the joint of the supporting part and the rotating part, the sealing structure B is rotatably connected to the rotating part and fixedly connected to the supporting part, a second driving device for driving the rotating part to rotate is provided on the rotating part, and the feed inlet and the discharge outlet are respectively arranged on the supporting parts at both ends of the rotating part; a plurality of baffle plates are arranged along the axial direction at the inner wall of the rotating part; temperature measuring devices are respectively arranged at the feed inlet and the discharge outlet; the temperature measuring devices are electrically connected to a control device, and the control device is electrically connected to the first driving device and the second driving device; a material temperature signal is transmitted between the temperature measuring devices and the control device, and control signals are respectively transmitted between the first driving device, the second driving device and the control device, and a plurality of the cooling units are circumferentially and evenly distributed in the cylinder body.

2. The high-temperature material cooling device according to claim 1, characterized in that, The first driving device includes a first motor and a first transmission mechanism, and the first motor is connected to the enhanced cooling module through the first transmission mechanism; the second driving device includes a second motor and a second transmission mechanism, and the second motor is connected to the rotating part through the second transmission mechanism; both the first motor and the second motor are variable frequency motors.

3. The high-temperature material cooling device according to claim 1, characterized in that, The cooling medium outlet is connected with a heat recovery device.

4. The high-temperature material cooling device according to claim 1, characterized in that, Air lock devices are respectively arranged at the feed inlet and the discharge outlet.

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