Device for extracting vanadium from stone coal based on microwave heating and use method of device

Abstract

The invention relates to the technical field of stone coal smelting equipment, in particular to a device for extracting vanadium from stone coal based on microwave heating and a using method thereof.The device comprises a waste heat boiler, a generator set connected with the waste heat boiler, a material elevator and four layers of supporting frames, and further comprises a preheating rotary furnace installed on the topmost layer of the supporting frames, the two ends of the base are sleeved with sleeves. Under the action of the angle adjusting mechanism, the gliding speed of the material in each furnace can be controlled, so that the heating or cooling duration in each stage is controlled, and the final leaching rate of vanadium is improved; the dielectric ceramic homogenizes microwave energy, and is matched with the shoveling plate, so that the materials are continuously overturned in the heating process, the heating is more uniform, and the leaching rate of vanadium is further improved; the parts for extracting vanadium from the stone coal are all concentrated on the support frame, so that the occupied area is small, and the space is saved.

Description

Technical Field

[0001] The invention relates to the technical field of stone coal smelting equipment, and in particular to a device for extracting vanadium from stone coal based on microwave heating and a method for using the device. Background Art

[0002] Acid leaching is the most commonly used leaching technology for stone coal vanadium ore. With its wide adaptability and leaching rate of 45% to 55%, it occupies a dominant position in the domestic stone coal vanadium ore vanadium extraction operation. With the continuous advancement of science and technology and the continuous innovation of technology, a series of emerging vanadium extraction technologies, especially microwave technology, have been introduced into this field, showing significant advantages in significantly improving leaching rate, reducing energy consumption and reducing environmental burden. Microwave roasting technology is particularly outstanding, which can increase the leaching rate to 64.1% or even higher, showing great application potential. Against this background, relevant patents came into being, such as "A vanadium shale microwave suspension roasting-alkali maturation vanadium extraction system and method" with announcement number CN115747488A and "A vanadium shale segmented microwave roasting-step alkali leaching vanadium extraction method" with announcement number CN115725863A, both of which cleverly use the microwave heating principle to optimize the vanadium extraction process.

[0003] At present, this field urgently needs a stone coal vanadium extraction device based on microwave heating that can match these optimized vanadium extraction methods, aiming to maximize the vanadium leaching efficiency. At the same time, after in-depth research, technicians found that in the stone coal vanadium extraction process, stone coal needs to undergo multiple heating treatments, and the heat energy generated by each process is often not effectively integrated and utilized, resulting in significant heat energy loss. Therefore, the development of an efficient heat energy recovery and reuse mechanism has become the key to further improving the efficiency and economic benefits of stone coal vanadium extraction. To this end, we propose a stone coal vanadium extraction device based on microwave heating and its use method. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a device for extracting vanadium from stone coal based on microwave heating and a method for using the device, comprising a waste heat boiler, a generator set connected to the waste heat boiler, a material hoist and a support frame, wherein the support frame has four layers and further comprises: A preheating rotary kiln, which is installed on the top layer of the support frame and is sleeved at both ends. The sleeves are rotatably connected to the preheating rotary kiln, and a hopper is installed on the sleeve at the feed inlet, and the hopper corresponds to the discharge port of the material elevator; A decarburization rotary kiln, the decarburization rotary kiln is installed on the second layer from the top to the bottom of the support frame, and sleeves are sleeved at both ends, the sleeves are rotatably connected to the decarburization rotary kiln, a metal hose is connected between the sleeve at the inlet position of the decarburization rotary kiln and the sleeve at the outlet position of the preheating rotary kiln, and the middle part of the shell of the decarburization rotary kiln is octagonal; The vanadium-extracting rotary furnace is installed on the third layer from the top to the bottom of the support frame, and sleeves are sleeved at both ends. The sleeves are rotatably connected to the vanadium-extracting rotary furnace. A metal hose is connected between the sleeves at the inlet position of the vanadium-extracting rotary furnace and the sleeves at the outlet position of the decarburization rotary furnace. The middle part of the shell of the vanadium-extracting rotary furnace is octagonal. A cooling furnace, wherein the cooling furnace is installed on the fourth layer from the top to the bottom of the support frame, and a metal hose is connected between the inlet of the cooling furnace and the sleeve of the outlet of the vanadium oxidation rotary furnace; Microwave generators, there are several microwave generators, which are arrayed on the middle part of the shell of the decarburization rotary furnace and the oxidation vanadium extraction rotary furnace, and are all connected to the generator set through wires; Dielectric ceramics, there are two of the dielectric ceramics, which are respectively installed in the decarburization rotary furnace and the oxidation vanadium extraction rotary furnace, the inner wall of the dielectric ceramics is provided with trapezoidal grooves, there are four trapezoidal grooves in the dielectric ceramics, and they are evenly distributed, and the trapezoidal grooves are installed with copying plates, one end of which is trapezoidal and engaged with the trapezoidal grooves; Angle adjustment mechanisms, there are four adjustment mechanisms with the same structure, which are respectively installed on each layer of the support frame to adjust the angles between the preheating rotary kiln, the decarburization rotary kiln, the oxidation vanadium extraction rotary kiln and the cooling furnace and the ground; a first heat recovery mechanism, which is installed on the waste heat boiler and connected to the decarburization rotary furnace and the oxidation vanadium extraction rotary furnace, and extracts part of the heat energy generated by the decarburization rotary furnace and the oxidation vanadium extraction rotary furnace into the waste heat boiler, and drives the generator set to generate electricity through the waste heat boiler, a part of the generated electricity is used to provide power for the microwave generator, and the excess is used for vanadium downstream products; The second heat energy recovery mechanism is installed on the support frame and connected to the preheating rotary furnace and the cooling furnace. The second heat energy recovery mechanism draws the high-temperature gas in the cooling furnace into the preheating rotary furnace to preheat the material in the preheating rotary furnace.

[0005] Preferably, a tee is connected to the collar at the discharge port of the decarburization rotary furnace, the tee is F-shaped, the middle port of the tee is connected to the collar at the feed port of the oxidation vanadium extraction rotary furnace, and the through hole at the bottom end of the tee is connected to an ozone generator.

[0006] Preferably, the angle adjustment mechanism located at the topmost layer includes a support seat that clamps the sleeves at both ends of the preheating rotary furnace. The support seat is fixedly connected to the sleeve. At the bottom end of one side of the support seat near the discharge port of the preheating rotary furnace, a hinge is installed. One side of the hinge is connected to the bottom end of the support seat, and the other side is connected to the top surface of the support frame. It also includes a slide rail installed at the bottom end of one side of the support seat near the feed port of the preheating rotary furnace. On one side of the top surface of the topmost layer of the support frame near the feed port of the preheating rotary furnace, a servo motor is installed. A rotating rod is installed on the output shaft of the servo motor. The rotating rod is in the shape of "冂" and penetrates through the slide rail, and a roller is sleeved on the part penetrating through the slide rail. The other three angle adjustment mechanisms are respectively arranged in the same way as the components of the corresponding layer.

[0007] Preferably, high-purity alumina fibers are provided in the middle parts of both the decarburization rotary furnace and the vanadium extraction and oxidation rotary furnace. The high-purity alumina fibers are respectively filled in the spaces between the outer shells of the decarburization rotary furnace and the vanadium extraction and oxidation rotary furnace and the dielectric ceramics.

[0008] Preferably, fixing rings are sleeved on the metal hoses, and vibrators are installed on the fixing rings.

[0009] Preferably, the first heat recovery mechanism includes a Y-shaped pipe communicated with the waste heat boiler. A first blower is connected to the part of the Y-shaped pipe near the preheating boiler. The other two ports of the Y-shaped pipe are respectively communicated with the collar at the feed port position of the decarburization rotary furnace and the collar at the discharge port position of the vanadium extraction and oxidation rotary furnace.

[0010] Preferably, the second heat recovery mechanism includes a second blower installed on the support frame. The air inlet of the second blower is communicated with the top end of the feed port of the cooling furnace through a pipeline, and the air outlet is communicated with the top end of the collar at the discharge port position of the preheating rotary furnace through a pipeline. It also includes a third blower installed on the top end of the collar at the feed port position of the preheating rotary furnace. The air inlet of the third blower is communicated with the collar, and the air outlet is connected to the flue gas treatment system through a pipeline.

[0011] A usage method of a device for extracting vanadium from stone coal based on microwave heating: includes the following steps: S1: According to the required heating duration at each stage of the material, adjust the angles between the preheating rotary furnace, the decarburization rotary furnace, the vanadium extraction and oxidation rotary furnace, the cooling furnace and the ground through the angle adjustment mechanism; S2: Turn on the microwave generator. The microwave generator heats the interiors of the decarburization rotary furnace and the vanadium extraction and oxidation rotary furnace respectively through microwave energy, heat the interior of the decarburization rotary furnace to 600 °C, heat the interior of the vanadium extraction and oxidation rotary furnace to 800 °C, and the dielectric ceramics homogenize this part of the heat energy; S3: Turn on the generator set, waste heat boiler, ozone generator, material elevator, first blower, second blower, third blower, preheating rotary kiln, decarbonization rotary kiln, oxidation vanadium extraction rotary kiln, and vibrator, and transport materials to the material elevator; S4: Collect the products at the outlet of the cooling furnace.

[0012] The present invention has at least the following beneficial effects: 1. Under the action of the angle adjustment mechanism, the speed at which the material slides down in each furnace can be controlled, thereby controlling the heating or cooling time at each stage and improving the final vanadium leaching rate; 2. Dielectric ceramics homogenize microwave energy, and with the help of a copy plate, the material is constantly turned over during the heating process, making the heating more uniform and further improving the leaching rate of vanadium; 3. The vanadium extraction part of stone coal is concentrated on the support frame, which occupies a small area and saves space; 4. Under the action of the first heat recovery mechanism, the second heat recovery mechanism and the waste heat boiler, the heat energy is fully utilized, the heat loss is reduced, and the production cost is reduced; 5. The ozone generated by the ozone generator is injected into the decarbonization rotary furnace and the oxidation vanadium extraction rotary furnace through a three-way pipe. The stone coal reacts with the ozone during the heating process to further increase the vanadium leaching rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a rear view structural schematic diagram of the present invention; Figure 3 It is a schematic diagram of the local structure of the present invention; Figure 4 For the present invention Figure 3 Schematic diagram of the structure at A in the middle; Figure 5 This is a schematic diagram of the internal structure of the decarburization rotary furnace of the present invention; Figure 6 It is a flow chart of the present invention.

[0014] In the figure: 10, waste heat boiler; 11, generator set; 12, material elevator; 20, support frame; 21, preheating rotary furnace; 211, upper hopper; 22, decarburization rotary furnace; 23, oxidation vanadium extraction rotary furnace; 230, high purity alumina fiber; 24, cooling furnace; 3, microwave generator; 4, dielectric ceramics; 41, trapezoidal groove; 42, copy board; 5, angle adjustment mechanism; 51, support seat; 52, hinge; 53, slide rail; 54, servo motor; 55, rotating rod; 56, roller; 6, first heat recovery mechanism; 61, Y-shaped pipe; 62, first blower; 7, second heat recovery mechanism; 71, second blower; 72, third blower; 80, three-way pipe; 81, ozone generator; 230, high purity alumina fiber; 90, fixing ring; 91, vibrator. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Example

[0016] See also Figure 1-6 The present invention provides a technical solution: a device for extracting vanadium from stone coal based on microwave heating, comprising a waste heat boiler 10, a generator set 11 connected to the waste heat boiler 10, a material hoist 12 and a support frame 20, the support frame 20 has four layers, the waste heat boiler 10 and the generator set 11 are existing technologies, and further comprises: The preheating rotary kiln 21 is installed on the top layer of the support frame 20, and sleeves are sleeved at both ends. The sleeves are rotatably connected to the preheating rotary kiln 21, and an upper hopper 211 is installed on the sleeve ring at the feeding port, and the upper hopper 211 corresponds to the discharge port of the material hoist 12; The decarburization rotary kiln 22 is installed on the second layer from the top to the bottom of the support frame 20, and sleeves are sleeved at both ends. The sleeves and the decarburization rotary kiln 22 are rotatably connected. A metal hose is connected between the sleeve at the inlet position of the decarburization rotary kiln 22 and the sleeve at the outlet position of the preheating rotary kiln 21. The middle part of the shell of the decarburization rotary kiln 22 is octagonal. The metal hose is a steel wire braided type with a high braiding density. The metal hoses mentioned below are the same product.

[0017] The vanadium-extracting rotary furnace 23 is installed on the third layer from the top to the bottom of the support frame 20, and sleeves are sleeved at both ends. The sleeves are rotatably connected to the vanadium-extracting rotary furnace 23. A metal hose is connected between the sleeve at the inlet position of the vanadium-extracting rotary furnace 23 and the sleeve at the outlet position of the decarburization rotary furnace 22. The middle part of the shell of the vanadium-extracting rotary furnace 23 is octagonal. The cooling furnace 24 is installed on the fourth layer from the top to the bottom of the support frame 20, and a metal hose is connected between its inlet and the sleeve of the outlet of the vanadium oxide rotary furnace 23; Microwave generators 3, there are several microwave generators 3, which are arrayed on the middle part of the shell of the decarburization rotary furnace 22 and the oxidation vanadium extraction rotary furnace 23, and are all connected to the generator set 11 through wires; Dielectric ceramic 4, there are two dielectric ceramics 4, which are respectively installed in the decarburization rotary furnace 22 and the oxidation vanadium extraction rotary furnace 23, and the inner wall of the dielectric ceramic 4 is provided with a trapezoidal groove 41, and there are four trapezoidal grooves 41 in the dielectric ceramic 4, and they are evenly distributed, and a copying plate 42 is installed in the trapezoidal groove 41, and one end of the copying plate 42 is trapezoidal and is engaged with the trapezoidal groove 41; The dielectric ceramic 4 can homogenize microwaves and heat the materials inside more evenly. When the decarburization rotary kiln 22 and the oxidation vanadium extraction rotary kiln 23 rotate, the dielectric ceramic 4 is driven to rotate. During the rotation of the lifting plate 42 on the dielectric ceramic 4, the materials are turned over, so that the materials are heated more evenly.

[0018] Angle adjustment mechanism 5, there are four adjustment mechanisms with the same structure, which are respectively installed on each layer of the support frame 20, and respectively adjust the angle between the preheating rotary kiln 21, the decarburization rotary kiln 22, the oxidation vanadium extraction rotary kiln 23 and the cooling furnace 24 and the ground; The first heat energy recovery mechanism 6 is installed on the waste heat boiler 10 and is connected to the decarburization rotary furnace 22 and the oxidation vanadium extraction rotary furnace 23. The first heat energy recovery mechanism 6 extracts part of the heat energy generated by the decarburization rotary furnace 22 and the oxidation vanadium extraction rotary furnace 23 into the waste heat boiler 10, and drives the generator set 11 to generate electricity through the waste heat boiler 10. A part of the generated electricity is used to provide power for the microwave generator 3, and the excess part is used for vanadium downstream products; The second heat energy recovery mechanism 7 is installed on the support frame 20 and is connected to the preheating rotary kiln 21 and the cooling furnace 24. The second heat energy recovery mechanism 7 extracts the high-temperature gas in the cooling furnace 24 into the preheating rotary kiln 21 to preheat the material in the preheating rotary kiln 21.

[0019] A three-way pipe 80 is connected to the collar at the discharge port position of the decarbonization rotary furnace 22. The three-way pipe 80 is in the shape of an F. The middle port of the three-way pipe 80 is connected to the collar at the feed port position of the vanadium extraction rotary furnace 23 by oxidation. The through hole at the bottom end of the three-way pipe 80 is connected with an ozone generator 81.

[0020] Through experiments, the strong oxidizing property of ozone can destroy the mineral structure in the stone coal, promote the release and dissolution of vanadium, and significantly improve the leaching rate of vanadium. The ozone generated by the ozone generator 81 enters the inside of the decarbonization rotary furnace 22 and the vanadium extraction rotary furnace 23 by oxidation through the three-way pipe 80 respectively, which has a positive effect on the quality of the final product.

[0021] The angle adjustment mechanism 5 located at the topmost layer includes a support seat 51 that clamps the sleeves at both ends of the preheating rotary furnace 21. The support seat 51 is fixedly connected to the sleeve. A hinge 52 is installed at the bottom end of one side of the support seat 51 close to the discharge port position of the preheating rotary furnace 21. One side of the hinge 52 is connected to the bottom end of the support seat 51, and the other side is connected to the top surface of the support frame 20. It also includes a slide rail 53 installed at the bottom end of one side of the support seat 51 close to the feed port position of the preheating rotary furnace 21. A servo motor 54 is installed on one side of the top surface of the topmost layer of the support frame 20 close to the feed port position of the preheating rotary furnace 21. A rotating rod 55 is installed on the output shaft of the servo motor 54. The rotating rod 55 is in the shape of "冂", penetrates through the slide rail 53, and a roller 56 is sleeved on the part penetrating through the slide rail 53. The other three angle adjustment mechanisms 5 are arranged in the same way as the components of the corresponding layer, and the whole is in a zigzag shape.

[0022] The quality and calorific value of the stone coal vary from place to place, and the required heating time is also different. The staff can control the angle adjustment mechanism 5 according to the actual situation. The operation method is as follows: turn on the servo motor 54, the servo motor 54 drives the rotating rod 55 to rotate. During the rotation of the rotating rod 55, the preheating rotary furnace 21 is lifted or lowered on one side through the roller 56 and the slide rail 53, so as to adjust the angle between the preheating rotary furnace 21 and the ground, and control the sliding speed of the material in the preheating rotary furnace 21. The same applies to the other three parts; High-purity alumina fibers 230 are provided in the middle parts of both the decarbonization rotary furnace 22 and the vanadium extraction rotary furnace 23 by oxidation. The high-purity alumina fibers 230 are respectively filled in the space between the outer shells of the decarbonization rotary furnace 22 and the vanadium extraction rotary furnace 23 by oxidation and the dielectric ceramics 4.

[0023] The high-purity alumina fibers 230 have a weak influence on microwaves, that is, they hardly affect the heating effect inside the decarbonization rotary furnace 22 and the vanadium extraction rotary furnace 23 by oxidation. Their excellent heat preservation performance can simultaneously greatly reduce the heat loss inside the decarbonization rotary furnace 22 and the vanadium extraction rotary furnace 23 by oxidation, and reduce the energy consumption of the microwave generator 3.

[0024] Fixed rings 90 are sleeved on the metal hoses, and vibrators 91 are installed on the fixed rings 90.

[0025] Due to the shape limitation of the metal hose itself, the material stays in the bend for a longer time, and the vibrator 91 can effectively increase the speed at which the material passes through the metal hose.

[0026] The first heat energy recovery mechanism 6 includes a Y-shaped tube 61 connected to the waste heat boiler 10. The first blower 62 is connected to the part of the Y-shaped tube 61 close to the preheating boiler. The other two openings of the Y-shaped tube 61 are respectively connected to the ring at the feed port of the decarbonization rotary furnace 22 and the ring at the discharge port of the oxidation and vanadium extraction rotary furnace 23.

[0027] Since the preheating rotary kiln 21, the decarbonization rotary kiln 22, the oxidation vanadium extraction rotary kiln 23, and the cooling furnace 24 are connected in sequence through metal hoses, the large temperature difference inside each component will cause the high heat part to continuously transfer to the low heat part, and the temperature of the material at each stage will be unstable. After the first blower 62 is turned on, the heat in the device is extracted from the discharge port of the decarbonization rotary kiln and the feed port of the oxidation vanadium extraction rotary kiln 23 through the Y-shaped tube 61. During the heat transfer process, the heat is extracted by the first blower 62 when passing through the Y-shaped tube 61, so as to prevent the high-temperature gas in the oxidation vanadium extraction rotary kiln 23 from entering the decarbonization rotary kiln 22, resulting in excessive temperature in the decarbonization rotary kiln 22. At the same time, the high-temperature gas extracted by the first blower 62 enters the waste heat boiler 10. The waste heat boiler 10 cooperates with the generator set 11 to convert thermal energy into electrical energy. The electrical energy part provides power for the microwave generator 3, and the excess part can be used for vanadium downstream products, so that energy is efficiently utilized.

[0028] The second heat energy recovery mechanism 7 includes a second blower 71 installed on the support frame 20, the air inlet of the second blower 71 is connected to the top of the feed port of the cooling furnace 24 through a pipeline, and the air outlet is connected to the top of the sleeve ring at the discharge port of the preheating rotary furnace 21 through a pipeline. It also includes a third blower 72 installed at the top of the sleeve ring at the feed port of the preheating rotary furnace 21. The air inlet of the third blower 72 is connected to the sleeve ring, and the air outlet is connected to the flue gas treatment system through a pipeline. The flue gas treatment system is the existing technology.

[0029] The second blower 71 is turned on to extract the gas at the feed port of the cooling furnace 24. This part of the gas consists of two parts, one part comes from the high-temperature gas in the oxidation vanadium extraction rotary furnace 23, and the other part comes from the normal temperature gas extracted from the discharge port of the cooling furnace 24. The temperature of the two parts of gas after mixing is close to the temperature in the decarbonization rotary furnace 22. The mixed gas is transmitted to the preheating rotary furnace 21 through the second blower 71 and the pipeline. The third blower 72 is turned on. At this time, the newly injected high-temperature mixed gas in the preheating rotary furnace 21 is extracted into two parts. One part is extracted by the third blower 72. During the extraction process, the high-temperature mixed gas passes through the entire preheating rotary furnace 21 to preheat the material in the preheating rotary furnace 21, and is then processed by the flue gas treatment system. The other part is extracted by the first blower 62 and enters the decarbonization rotary furnace 22, thereby reducing the energy consumption required to heat the decarbonization rotary furnace 22.

[0030] A method for using a device for extracting vanadium from stone coal based on microwave heating, comprising the following steps: S1: According to the heating time required for each stage of the material, the angles between the preheating rotary kiln 21, the decarburization rotary kiln 22, the oxidation vanadium extraction rotary kiln 23, the cooling furnace 24 and the ground are adjusted through the angle adjustment mechanism 5; S2: Turn on the microwave generator 3, and heat the interior of the decarburization rotary kiln 22 and the oxidation vanadium extraction rotary kiln 23 respectively through microwave energy, and heat the interior of the decarburization rotary kiln 22 to 600° C. and the interior of the oxidation vanadium extraction rotary kiln 23 to 800° C. The dielectric ceramic 4 homogenizes this part of the heat energy; S3: Turn on the generator set 11, the waste heat boiler 10, the ozone generator 81, the material elevator 12, the first blower 62, the second blower 71, the third blower 72, the preheating rotary kiln 21, the decarbonization rotary kiln 22, the oxidation vanadium extraction rotary kiln 23, and the vibrator 91, and transport materials to the material elevator 12; S4: Collect the products at the outlet of the cooling furnace 24.

[0031] The working principle is as follows: the staff can adjust the angles formed between the preheating rotary kiln 21, the decarburization rotary kiln 22, the oxidation vanadium extraction rotary kiln 23, the cooling kiln 24 and the ground through the angle adjustment mechanism 5 according to the actual situation, and then turn on the microwave generator 3. The microwave generator 3 heats the decarburization rotary kiln 22 and the oxidation vanadium extraction rotary kiln 23 respectively through microwave energy, and heats the decarburization rotary kiln 22 to 600°C and the oxidation vanadium extraction rotary kiln 23 to 800°C. The dielectric ceramic 4 homogenizes this part of the heat energy; The material is continuously added to the material elevator 12, and the material elevator 12 transfers the material to the top of itself. Then the material enters the preheating rotary kiln 21 through the upper hopper 211. The second blower 71 is turned on to extract the gas at the feeding port of the cooling furnace 24. This part of the gas is composed of two parts, one part comes from the high-temperature gas in the oxidation vanadium extraction rotary kiln 23, and the other part comes from the normal temperature gas extracted from the discharge port of the cooling furnace 24. While the normal temperature gas is being extracted, the material in the cooling furnace 24 is cooled. The temperature of the two parts of gas after mixing is close to the temperature in the decarbonization rotary kiln 22, which is 500-600°C. The gas is transported to the preheating rotary kiln 21 through the second blower 71 and the pipeline, and the third blower 72 is turned on. At this time, the newly injected high-temperature mixed gas in the preheating rotary kiln 21 is extracted in two parts. One part is extracted by the third blower 72. During the extraction process, the high-temperature mixed gas passes through the entire preheating rotary kiln 21 to preheat the materials in the preheating rotary kiln 21, and is then processed by the flue gas treatment system. At this time, the flue gas temperature of this part is 100-150°C, which reduces the difficulty of flue gas treatment. The other part is extracted by the first blower 62 and enters the decarbonization rotary kiln 22, reducing the energy consumption required to heat the decarbonization rotary kiln 22. The preheated material slides into the decarburization rotary kiln 22 through the metal hose under the action of its own gravity, undergoes a decarburization treatment at 600°C, and then passes through the high-temperature roasting of the oxidation vanadium extraction rotary kiln 23800°C in turn, and is finally discharged from the discharge port of the cooling furnace 24 through the cooling furnace 24. During this process, the first blower 62 is turned on, and the heat in the device is extracted from the discharge port of the decarburization rotary kiln and the feed port of the oxidation vanadium extraction rotary kiln 23 through the Y-shaped tube 61. The temperature of the gas extracted from the decarburization rotary kiln 22 by the Y-shaped tube 61 is 500-500°C, and the gas from the oxidation vanadium extraction rotary kiln 23 is 200-300°C. The temperature of the gas extracted from the vanadium extraction rotary furnace 23 is 600-700°C. During the heat transfer process, the gas is extracted by the first blower 62 when passing through the Y-shaped tube 61, so as to prevent the high-temperature gas in the oxidation vanadium extraction rotary furnace 23 from entering the decarburization rotary furnace 22, which would cause the temperature in the decarburization rotary furnace 22 to be too high. At the same time, the high-temperature gas extracted by the first blower 62 enters the waste heat boiler 10. The waste heat boiler 10 cooperates with the generator set 11 to convert the heat energy into electrical energy. The electrical energy is partially used to provide power for the microwave generator 3, and the excess can be used for vanadium downstream products, so that energy is efficiently used. Meanwhile, during the vanadium extraction process, ozone generated by the ozone generator 81 enters the decarburization rotary furnace 22 and the oxidation vanadium extraction rotary furnace 23 through the three-way pipe 80, respectively, to increase the vanadium leaching rate.

[0032] After actual testing by technicians in this field, the following data were obtained: 1. Vanadium shale (≤3mm, 4% carbon, 0.8% vanadium), decarburization at 600℃ for 0.5h, oxidation roasting at 850℃ for 6h; the vanadium leaching rate reaches 85%; 2. Vanadium shale (≤3mm, carbon content 10%, vanadium content 1.0%), decarburization at 600℃ for 1h, oxidation roasting at 850℃ for 3h; the vanadium leaching rate reaches 90%; 3. Vanadium shale (50 mesh, 8% carbon, 0.9% vanadium), decarburization at 600℃ for 1h, oxidation roasting at 850℃ for 2h; the vanadium leaching rate reached 89%; This proves that the device greatly improves the vanadium leaching rate compared with existing production equipment.

[0033] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for extracting vanadium from stone coal based on microwave heating, comprising a waste heat boiler (10), a generator set (11) connected to the waste heat boiler (10), a material elevator (12) and a support frame (20), wherein the support frame (20) has four layers in total, and is characterized in that: Also includes: A preheating rotary kiln (21), the preheating rotary kiln (21) being mounted on the topmost layer of the support frame (20), and having sleeves sleeved at both ends, the sleeves being rotatably connected to the preheating rotary kiln (21), and having an upper hopper (211) mounted on the sleeve at the feed inlet position, the upper hopper (211) corresponding to the discharge port position of the material elevator (12); A decarburization rotary furnace (22), the decarburization rotary furnace (22) being installed on the second layer from the top to the bottom of the support frame (20), and having sleeves sleeved at both ends, the sleeves being rotatably connected to the decarburization rotary furnace (22), a metal hose being connected between the sleeves at the inlet position of the decarburization rotary furnace (22) and the sleeves at the outlet position of the preheating rotary furnace (21), and the middle portion of the shell of the decarburization rotary furnace (22) being octagonal; An oxidation vanadium extraction rotary furnace (23), the oxidation vanadium extraction rotary furnace (23) being installed on the third layer from the top to the bottom of the support frame (20), and having sleeves sleeved at both ends, the sleeves being rotatably connected to the oxidation vanadium extraction rotary furnace (23), a metal hose being connected between the sleeves at the inlet position of the oxidation vanadium extraction rotary furnace (23) and the sleeves at the outlet position of the decarburization rotary furnace (22), and the middle part of the shell of the oxidation vanadium extraction rotary furnace (23) being octagonal; A cooling furnace (24), the cooling furnace (24) being mounted on the fourth layer from the top to the bottom of the support frame (20), and a metal hose being connected between the inlet of the cooling furnace and the sleeve of the outlet of the vanadium oxide extraction rotary furnace (23); A microwave generator (3), wherein the microwave generator (3) is in a plurality and arrayed on the middle portion of the outer shell of the decarburization rotary furnace (22) and the oxidation vanadium extraction rotary furnace (23), and all are connected to the generator set (11) via electric wires; Dielectric ceramic (4), the dielectric ceramic (4) having two pieces, respectively penetrating the interior of a decarburization rotary furnace (22) and an oxidation vanadium extraction rotary furnace (23), the inner wall of the dielectric ceramic (4) being provided with a trapezoidal groove (41), the number of the trapezoidal grooves (41) in the dielectric ceramic (4) being four and evenly distributed, the trapezoidal grooves (41) being penetrating with a shoveling plate (42), one end of the shoveling plate (42) being trapezoidal and engaging with the trapezoidal groove (41); Angle adjustment mechanisms (5), the adjustment mechanisms having four parts and having the same structure, which are respectively installed on each layer of the support frame (20) to adjust the angles between the preheating rotary furnace (21), the decarburization rotary furnace (22), the oxidation vanadium extraction rotary furnace (23) and the cooling furnace (24) and the ground; The first heat energy recovery mechanism (6), the first heat energy recovery mechanism (6) is installed on the waste heat boiler (10) and is connected to the decarbonization rotary kiln (22) and the vanadium extraction rotary kiln (23). The first heat energy recovery mechanism (6) extracts part of the heat energy generated by the decarbonization rotary kiln (22) and the vanadium extraction rotary kiln (23) into the waste heat boiler (10), and drives the generator set (11) to generate electricity through the waste heat boiler (10). Part of the generated electricity provides electrical energy for the microwave generator (3), and the excess part is used for downstream vanadium products; The second heat energy recovery mechanism (7), the second heat energy recovery mechanism (7) is installed on the support frame (20) and is connected to the preheating rotary kiln (21) and the cooling furnace (24). The second heat energy recovery mechanism (7) extracts the high-temperature gas in the cooling furnace (24) into the preheating rotary kiln (21) to preheat the materials in the preheating rotary kiln (21).

2. The device for extracting vanadium from stone coal based on microwave heating according to claim 1, characterized in that: A three-way pipe (80) is communicated with the collar at the discharge port position of the decarbonization rotary kiln (22). The three-way pipe (80) is in an F shape. The middle port of the three-way pipe (80) is communicated with the collar at the feed port position of the vanadium extraction rotary kiln (23), and the through hole at the bottom end of the three-way pipe (80) is connected with an ozone generator (81).

3. The device for extracting vanadium from stone coal based on microwave heating according to claim 2, characterized in that: The angle adjustment mechanism (5) located on the topmost layer includes a support seat (51) that clamps the sleeves at both ends of the preheating rotary kiln (21). The support seat (51) is fixedly connected to the sleeve. A hinge (52) is installed at the bottom end of one side of the support seat (51) close to the discharge port position of the preheating rotary kiln (21). One side of the hinge (52) is connected to the bottom end of the support seat (51), and the other side is connected to the top surface of the support frame (20). It also includes a slide rail (53) installed at the bottom end of one side of the support seat (51) close to the feed port position of the preheating rotary kiln (21). A servo motor (54) is installed on the top surface of the topmost layer of the support frame (20) close to the feed port position of the preheating rotary kiln (21). A rotating rod (55) is installed on the output shaft of the servo motor (54). The rotating rod (55) is in a "冂" shape and penetrates through the slide rail (53). A roller (56) is sleeved on the part that penetrates through the slide rail (53). The other three angle adjustment mechanisms (5) are respectively arranged in the same way as the components on the corresponding layers, and the whole is in a zigzag shape.

4. The device for extracting vanadium from stone coal based on microwave heating according to claim 3, characterized in that: High-purity alumina fibers (230) are arranged in the middle parts of the decarbonization rotary kiln (22) and the vanadium extraction rotary kiln (23). The high-purity alumina fibers (230) are respectively filled in the space between the outer shells of the decarbonization rotary kiln (22) and the vanadium extraction rotary kiln (23) and the dielectric ceramic (4).

5. The device for extracting vanadium from stone coal based on microwave heating according to claim 4, characterized in that: Fixing rings (90) are sleeved on the metal hoses, and vibrators (91) are installed on the fixing rings (90).

6. The device for extracting vanadium from stone coal based on microwave heating according to claim 5, characterized in that: The first heat energy recovery mechanism (6) comprises a Y-shaped tube (61) connected to the waste heat boiler (10); a first blower (62) is connected to a portion of the Y-shaped tube (61) close to the preheating boiler; and the other two openings of the Y-shaped tube (61) are respectively connected to a sleeve ring at a feed inlet of a decarburization rotary furnace (22) and a sleeve ring at a discharge outlet of an oxidation vanadium extraction rotary furnace (23).

7. The device for extracting vanadium from stone coal based on microwave heating according to claim 6, characterized in that: The second heat energy recovery mechanism (7) comprises a second blower (71) mounted on a support frame (20), the air inlet of the second blower (71) being connected to the top of the feed inlet of the cooling furnace (24) through a pipeline, and the air outlet being connected to the top of the sleeve at the discharge port of the preheating rotary furnace (21) through a pipeline, and further comprising a third blower (72) mounted on the top of the sleeve at the feed inlet of the preheating rotary furnace (21), the air inlet of the third blower (72) being connected to the sleeve, and the air outlet being connected to the flue gas treatment system through a pipeline.

8. A method for using a device for extracting vanadium from stone coal based on microwave heating, characterized in that: The device for extracting vanadium from stone coal based on microwave heating according to any one of claims 1 to 7 comprises the following steps: S1: According to the heating time required for each stage of the material, the angles between the preheating rotary kiln (21), the decarburization rotary kiln (22), the oxidation vanadium extraction rotary kiln (23), the cooling furnace (24) and the ground are adjusted by an angle adjustment mechanism (5); S2: turning on the microwave generator (3), the microwave generator (3) heating the interior of the decarburization rotary furnace (22) and the oxidation vanadium extraction rotary furnace (23) respectively by microwave energy, heating the interior of the decarburization rotary furnace (22) to 600° C., and heating the interior of the oxidation vanadium extraction rotary furnace (23) to 800° C., and the dielectric ceramic (4) homogenizing this part of the heat energy; S3: turning on the generator set (11), the waste heat boiler (10), the ozone generator (81), the material elevator (12), the first blower (62), the second blower (71), the third blower (72), the preheating rotary kiln (21), the decarbonization rotary kiln (22), the oxidation vanadium extraction rotary kiln (23), and the vibrator (91), and conveying materials to the material elevator (12); S4: collecting the products at the outlet of the cooling furnace (24).

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