Vanadium slag roasting leaching equipment and method

Abstract

The present application relates to a kind of vanadium slag roasting leaching equipment and method, belong to the technical field of extracting vanadium, the vanadium slag roasting leaching equipment and method, including leaching tank, feeding hopper, drain pipe and controller, further include: flow guide hopper;Air extraction mechanism;Agitation mechanism;Wet grinding mechanism.The present application is ground by the setting of wet grinding mechanism, so that grinding cover is in the process of rotation cooperate grinding department and is ground to roasting clinker, further reduce the particle size of roasting clinker, at the same time, part of roasting clinker will enter grinding cover by feed inlet, at this time, part of roasting clinker is crushed by crushing rod, and the crushed roasting clinker is discharged by feed inlet, re-enters grinding department, and the crushed roasting clinker is ground again, avoid part of roasting clinker unable to enter between grinding cover and grinding department, cause difficult to crush large block clinker, further improve the processing quality and processing efficiency of roasting clinker, improve the leaching efficiency of vanadate in roasting clinker.

Description

Technical Field

[0001] This invention belongs to the field of vanadium extraction technology, specifically relating to a vanadium slag roasting and leaching equipment and method. Background Technology

[0002] "Vanadium slag roasting and leaching" is the process of extracting vanadium pentoxide from vanadium-containing steel slag (mainly converter vanadium slag). The core process of this process is a typical hydrometallurgical process. Its main purpose is to convert the water-insoluble vanadium compounds in vanadium slag into water-soluble vanadates, which are then extracted by water leaching and finally precipitated to obtain the vanadium product.

[0003] Currently, existing vanadium slag roasting leaching equipment dissolves the soluble vanadates generated in the roasted clinker into water during vanadate leaching, achieving the separation of vanadium from most of the insoluble residues. The main process is as follows: after the roasted clinker is cooled, it is directly added to the leaching agent (mainly purified water, sometimes dilute alkali or dilute acid) for leaching, resulting in vanadium-containing leaching agent and leaching residue. However, since the cooled roasted clinker will clump together during the roasting process, direct leaching will make it difficult for the leaching agent to penetrate into the clumped roasted clinker, resulting in long leaching time and low leaching efficiency. Based on this, a vanadium slag roasting leaching equipment and method are proposed. Summary of the Invention

[0004] The purpose of this invention is to provide a reasonably designed vanadium slag roasting and leaching equipment and method to solve the above-mentioned problems.

[0005] The present invention achieves the above objectives through the following technical solutions:

[0006] A vanadium slag roasting and leaching device includes a leaching tank, a feeding hopper, a drain pipe, and a controller, and further includes:

[0007] A guide hopper fixedly connected to the inner surface of the leaching tank for guiding the flow of roasted clinker;

[0008] A vacuuming mechanism fixedly connected to the top of the leaching tank for extracting hot air from inside the leaching tank;

[0009] A stirring mechanism is fixedly connected to the middle of the leaching tank and is fixedly connected to the air extraction mechanism. The stirring mechanism is used to stir the roasted clinker and the leaching agent and to inject hot gas into the roasted clinker and the leaching agent.

[0010] A wet grinding mechanism is fixedly connected to the outer surface of the stirring mechanism for reducing the particle size of the roasted clinker, and the wet grinding mechanism is located below the guide hopper.

[0011] As a further optimization of the present invention, the wet grinding mechanism includes a fixed sleeve that is rotatably and sealingly connected to the inner surface of the leaching tank. A grinding screen is fixedly connected to the inner ring of the fixed sleeve. A downwardly recessed grinding part is provided on the grinding screen. A drive shaft is rotatably and sealingly connected through the fixed sleeve. A gear is fixedly connected to one end of the drive shaft. The gear is located inside the fixed sleeve. A grinding sleeve is fixedly connected to the outer surface of the drive shaft. A crushing rod is fixedly connected to the outer surface of the drive shaft inside the grinding sleeve. A feed inlet is provided on the grinding sleeve. The grinding sleeve is located inside the grinding part.

[0012] As a further optimization of the present invention, a fixing ring is fixedly connected inside the leaching tank, the fixing sleeve is rotatably connected to the fixing ring in a sealing manner, and a toothed ring is fixedly connected to the bottom of the fixing ring, the toothed ring meshing with a gear.

[0013] As a further optimization of the present invention, the agitation mechanism includes a motor fixedly connected to the top of the leaching tank, a rotating shaft fixedly connected to the output end of the motor, the rotating shaft passing through the guide bucket and being rotatably connected to the guide bucket in a sealed manner, the bottom of the rotating shaft being rotatably connected to the inner bottom of the leaching tank in a sealed manner, an airflow channel being provided at the bottom of the rotating shaft, an air jet pipe being fixedly connected to the side wall of the rotating shaft, the air jet pipe being located below the grinding screen, the air jet pipe communicating with the interior of the airflow channel, an air jet hole being provided on the outer surface of the air jet pipe, and an agitation plate being fixedly connected to the outer surface of the rotating shaft, the agitation plate being located below the air jet pipe.

[0014] As a further optimization of the present invention, an air injection pipe is fixedly connected to the stirring plate, an air injection hole is opened on the air injection pipe, a vent pipe is fixedly connected to the air injection pipe, the vent pipe is fixedly connected to the rotating shaft, and the vent pipe is connected to the interior of the airflow channel.

[0015] As a further optimization of the present invention, the rotating shaft passes through the grinding mesh and is fixedly connected to the grinding mesh, and the transmission shaft is rotatably connected to the rotating shaft.

[0016] As a further optimization of the present invention, the air extraction mechanism includes an air pump fixedly connected to the top of the leaching tank, the air pump's suction end is fixedly connected to a filter sleeve, the air pump's exhaust end is fixedly connected to a connecting pipe, the filter sleeve is located inside the leaching tank, and the connecting pipe is fixedly connected to the leaching tank and connected to the interior of the airflow channel.

[0017] As a further optimization of the present invention, the feeding hopper is fixedly connected to the top of the leaching tank, the drain pipe is fixedly connected to the bottom of the leaching tank, and the controller is fixedly connected to the top of the leaching tank.

[0018] As a further optimization of the present invention, an inlet sleeve is fixedly connected to the outer surface of the leaching tank, and a communication port is opened on the side wall of the leaching tank. The leaching tank is connected to the inside of the inlet sleeve through the communication port. An exhaust pipe is fixedly connected to the side wall of the leaching tank. The exhaust pipe extends into the inlet sleeve, and the air inlet end of the exhaust pipe is located below the guide bucket. The top of the inlet sleeve is higher than the bottom of the guide bucket.

[0019] A method for roasting and leaching vanadium slag includes the following steps:

[0020] Step 1: Close the drain pipe and add room temperature leaching agent into the leaching tank through the inlet jacket;

[0021] Step 2: Add the roasted clinker into the leaching tank through the feeding hopper, and at the same time start the air pump and motor to make the wet grinding mechanism and stirring plate work;

[0022] Step 3: The roasted clinker entering the leaching tank will fall above the grinding screen under the action of the guide bucket;

[0023] Step 4: When the roasted clinker enters the leaching agent, the leaching agent will partially evaporate under high temperature. The water vapor formed by the evaporation will be injected into the airflow channel through the connecting pipe by the air pump, and then sprayed into the leaching agent through the air injection pipe.

[0024] Step 5: After adding the roasted feed, close the feeding hopper;

[0025] Step Six: After the leaching time is reached, open the drain pipe to discharge the leaching agent and leaching residue;

[0026] Step 7: After filtering and separating the discharged leaching agent and leaching residue, an acid solution is added to the leaching agent to precipitate vanadium in the form of ammonium polyvanadate. After washing, drying and calcination, vanadium pentoxide product is finally obtained.

[0027] The beneficial effects of this invention are as follows:

[0028] 1. This invention, through the setting of a wet grinding mechanism, allows the calcined clinker falling on top of the grinding mesh to enter the grinding section. During the rotation of the grinding sleeve, it works in conjunction with the grinding section to grind the calcined clinker, further reducing its particle size. During this process, some of the calcined clinker enters the grinding sleeve through the feed inlet and rolls within it. At this time, the crushing rod crushes a portion of the calcined clinker. The crushed calcined clinker is discharged through the feed inlet and re-enters the grinding section for further grinding. This avoids the situation where some calcined clinker cannot enter between the grinding sleeve and the grinding section, resulting in difficulty in crushing large pieces of clinker. This further improves the processing quality and efficiency of the calcined clinker and enhances the leaching efficiency of vanadates within the calcined clinker.

[0029] 2. This invention, through the arrangement of the stirring mechanism, ensures that the grinding mesh and grinding sleeve revolve clockwise, while the jet pipe is located in front of the grinding sleeve's clockwise rotation and is always in a jetting state. The gas ejected from the jet pipe through the jet hole will pass through the grinding mesh and grinding sleeve and act on the large pieces of roasted clinker within the grinding sleeve. This causes the large pieces of roasted clinker to move under the blowing action of the airflow, further accelerating the crushing efficiency of the crushing rod on the large pieces of roasted clinker. This facilitates better dissolution of vanadates in the roasted clinker by purified water. At the same time, the water vapor discharged from the air injection hole and jet hole will also pass through the grinding mesh and grinding sleeve, further agitating the roasted clinker, increasing its fluidity. Furthermore, the water vapor can heat the purified water, allowing the vanadates to dissolve quickly in the purified water, accelerating the dissolution efficiency of vanadates in the roasted clinker and shortening the leaching time.

[0030] 3. This invention utilizes a combination of an air extraction mechanism and a guide bucket. The roasted clinker flows from one side to the other under the action of the guide bucket, allowing it to enter the purified water. The roasted clinker entering the purified water undergoes a water quenching reaction, rapidly cooling and breaking down the high-temperature roasted clinker into fine, uniform solid particles. Meanwhile, the purified water, under the influence of the high-temperature roasted clinker, forms steam. This steam is discharged upwards through the discharge end of the guide bucket, impacting the roasted clinker. Simultaneously, it is filtered by an air pump through a filter sleeve and drawn into a connecting pipe. This steam is then injected into the purified water in the leaching tank through the connecting pipe, heating the purified water and allowing it to absorb vanadates carried in the steam, thus improving leaching efficiency. The steam entering the leaching tank through the connecting pipe is then discharged into the purified water in the inlet jacket through an exhaust pipe. The purified water in the inlet jacket further absorbs any remaining vanadates in the gas, further improving leaching efficiency while preventing gas from being released into the external environment and causing pollution. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the overall frontal three-dimensional structure of the present invention;

[0032] Figure 2 This is a schematic diagram of the three-dimensional structure of the water inlet jacket of the present invention, cut open in the middle;

[0033] Figure 3 This is a three-dimensional partial cross-sectional front view of the present invention;

[0034] Figure 4 This is a three-dimensional partial cross-sectional bottom view of the present invention;

[0035] Figure 5 This is a three-dimensional structural diagram of the wet grinding mechanism of the present invention;

[0036] Figure 6 This is a three-dimensional bottom view of the stirring mechanism of the present invention.

[0037] In the diagram: 1. Leaching tank; 2. Inlet jacket; 3. Feed hopper; 4. Drain pipe; 5. Controller; 6. Guide hopper; 7. Air extraction mechanism; 71. Air pump; 72. Filter sleeve; 73. Connecting pipe; 8. Stirring mechanism; 81. Motor; 82. Rotating shaft; 821. Airflow channel; 822. Jet pipe; 823. Jet hole; 83. Stirring plate; 831. Air injection pipe; 832. Vent pipe; 833. Air injection hole; 9. Wet grinding mechanism; 91. Grinding screen; 92. Grinding section; 93. Fixing sleeve; 94. Drive shaft; 95. Grinding sleeve; 96. Feed inlet; 97. Crushing rod; 98. Gear; 99. Fixing ring; 910. Gear ring; 10. Exhaust pipe; 11. Connecting port. Detailed Implementation

[0038] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0039] Example: Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, a vanadium slag roasting and leaching device includes a leaching tank 1, a feeding hopper 3, a drain pipe 4, and a controller 5. The feeding hopper 3 is fixedly connected to the top of the leaching tank 1, and the drain pipe 4 is fixedly connected to the bottom of the leaching tank 1. Electric valves are installed inside both the feeding hopper 3 and the drain pipe 4. The controller 5 is fixedly connected to the top of the leaching tank 1. A guide hopper 6 for guiding the roasted clinker is fixedly connected to the inner surface of the leaching tank 1. The discharge end of the guide hopper 6 and the discharge end of the feeding hopper 3 are located on opposite sides. A water inlet sleeve 2 is fixedly connected to the outer surface of the leaching tank 1. A connecting port 11 is opened on the side wall of the leaching tank 1, and the leaching tank 1 is connected to the inside of the water inlet sleeve 2 through the connecting port 11. An exhaust pipe 10 is fixedly connected to the side wall of the leaching tank 1. The exhaust pipe 10 extends into the water inlet sleeve 2, and the air inlet end of the exhaust pipe 10 is located below the guide hopper 6. The top of the water inlet sleeve 2 is higher than the bottom of the guide hopper 6. A vacuuming mechanism 7 for extracting hot air from inside the leaching tank 1 is fixedly connected to the top of the leaching tank 1. The vacuuming mechanism 7 includes an air pump 71 fixedly connected to the top of the leaching tank 1. A filter sleeve 72 is fixedly connected to the suction end of the air pump 71. The filter sleeve 72 is located inside the leaching tank 1. The discharge end of the guide bucket 6 and the discharge end of the feeding hopper 3 are located on the opposite sides. The suction end of the air pump 71 is set directly opposite the discharge end of the guide bucket 6. This allows the water vapor formed by the evaporation of the leaching agent by the high-temperature leaching clinker to be discharged upward through the discharge end of the guide bucket 6 during the process of the roasted clinker entering the leaching agent. This facilitates the extraction by the air pump 71. At the same time, the discharged water vapor can impact the roasted clinker, which facilitates the dispersion of agglomerated roasted clinker. A connecting pipe 73 is fixedly connected to the exhaust end of the air pump 71. The connecting pipe 73 is fixedly connected to the leaching tank 1. The air pump 71 and the electric valve are both electrically connected to the controller 5 and controlled by the controller 5.

[0040] During use, close the drain pipe 4, add room temperature clean water to the leaching tank 1 through the water inlet jacket 2, start the air pump 71 to extract the gas in the leaching tank 1, and inject the extracted gas into the leaching tank 1 through the connecting pipe 73. Then, add high-temperature roasted clinker to the leaching tank 1 through the feeding hopper 3. Under the action of the guide bucket 6, the roasted clinker flows from one side to the other, allowing it to enter the clean water. The roasted clinker entering the clean water will undergo a water quenching reaction, causing the high-temperature roasted clinker to cool rapidly and break into fine, uniform solid particles. The clean water will form water vapor under the action of the high-temperature roasted clinker. At this time, since the air pump 71's suction end is directly opposite the discharge end of the guide bucket 6, the formed water vapor will pass through... The material is discharged upwards through the discharge end of the guide hopper 6. A large amount of water vapor is blown toward the roasted clinker. At the same time, it is filtered by the air pump 71 through the filter sleeve 72 and then drawn into the connecting pipe 73 (it should be noted that the amount of gas drawn by the air pump 71 is greater than the amount of water vapor generated). Then, it is injected into the clean water in the leaching tank 1 through the connecting pipe 73, heating the clean water and allowing the clean water to absorb the vanadates carried in the water vapor, thereby improving the leaching efficiency. The water vapor that enters the leaching tank 1 through the connecting pipe 73 will be discharged into the clean water in the water inlet sleeve 2 through the exhaust pipe 10. The clean water in the water inlet sleeve 2 will further absorb any vanadates that may remain in the gas, further improving the leaching efficiency, while avoiding the gas from being emitted into the external environment and causing pollution.

[0041] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, a stirring mechanism 8, which is fixedly connected to the suction mechanism 7, is fixedly connected to the middle of the leaching tank 1. The stirring mechanism 8 is used to stir the roasted clinker and the leaching agent, and to inject hot gas into the roasted clinker and the leaching agent. The stirring mechanism 8 includes a motor 81 fixedly connected to the top of the leaching tank 1. The motor 81 is electrically connected to the controller 5 and is controlled by the controller 5. A rotating shaft 82 is fixedly connected to the output end of the motor 81. The rotating shaft 82 passes through the guide bucket 6 and is rotatably connected to the guide bucket 6 in a sealed manner. The bottom of the rotating shaft 82 is rotatably connected to the inner bottom of the leaching tank 1 in a sealed manner. An airflow channel 821 is opened at the bottom of the rotating shaft 82. The connecting pipe 73 is connected to the airflow channel 821. 1. Internally connected, a jet pipe 822 is fixedly connected to the side wall of the rotating shaft 82. The jet pipe 822 is located below the grinding mesh 91 and is internally connected to the airflow channel 821. A jet hole 823 is opened on the outer surface of the jet pipe 822. A stirring plate 83 is fixedly connected to the outer surface of the rotating shaft 82. The stirring plate 83 is located below the jet pipe 822. An air injection pipe 831 is fixedly connected to the stirring plate 83. An air injection hole 833 is opened on the air injection pipe 831. A vent pipe 832 is fixedly connected to the air injection pipe 831. The vent pipe 832 is fixedly connected to the rotating shaft 82 and is internally connected to the airflow channel 821.

[0042] When adding high-temperature roasted clinker, the motor 81 is started, causing the motor 81 to drive the rotating shaft 82 to rotate, which in turn drives the jet pipe 822 and the stirring plate 83 to rotate. The stirring plate 83 stirs the purified water and roasted clinker, allowing the leaching water to better dissolve the vanadates in the roasted clinker. During this process, the water vapor discharged from the connecting pipe 73 will enter the airflow channel 821, and then enter the jet pipe 822 and the vent pipe 832 respectively. The water vapor entering the jet pipe 822 will be sprayed into the roasted clinker through the jet hole 823, while the water vapor entering the vent pipe 832 will enter the air injection pipe 831, and then be injected into the purified water and roasted clinker through the air injection hole 833. Heating the purified water allows the vanadates to dissolve quickly in the purified water, accelerating the dissolution efficiency of the vanadates in the roasted clinker and shortening the leaching time.

[0043] like Figure 3 , Figure 4 and Figure 5 As shown, a wet grinding mechanism 9 for reducing the particle size of roasted clinker is fixedly connected to the outer surface of the stirring mechanism 8. The wet grinding mechanism 9 is located below the guide bucket 6. The wet grinding mechanism 9 includes a fixed sleeve 93 that is rotatably and sealingly connected to the inner surface of the leaching tank 1. A grinding screen 91 is fixedly connected to the inner ring of the fixed sleeve 93. A rotating shaft 82 passes through the grinding screen 91 and is fixedly connected to the grinding screen 91. The grinding screen 91 is provided with a downwardly recessed grinding part 92. A drive shaft 94 is rotatably and sealingly connected to the fixed sleeve 93. The drive shaft 94 is rotatably connected to the rotating shaft 82. A gear 98 is fixedly connected to one end of the drive shaft 94. The gear 98 is located at... Inside the fixed sleeve 93, a fixed ring 99 is fixedly connected to the leaching tank 1. The fixed sleeve 93 and the fixed ring 99 are rotatably connected in a sealed manner. A toothed ring 910 is fixedly connected to the bottom of the fixed ring 99. The toothed ring 910 meshes with the gear 98. A grinding sleeve 95 is fixedly connected to the outer surface of the drive shaft 94. The jet hole 823 is inclined toward the grinding sleeve 95. A crushing rod 97 is fixedly connected to the outer surface of the drive shaft 94 inside the grinding sleeve 95. A feed port 96 is opened on the grinding sleeve 95. The grinding sleeve 95 is located inside the grinding section 92. It should be noted that the grinding sleeve 95, the grinding mesh 91, and the grinding section 92 are all set as mesh structures.

[0044] The rotation of the rotating shaft 82 will cause the grinding screen 91 and the drive shaft 94 to rotate clockwise. The rotation of the drive shaft 94 will cause the gear 98 to move along the bottom of the gear ring 910. Since the gear 98 meshes with the gear ring 910, the gear 98 will rotate under the action of the gear ring 910, thereby causing the drive shaft 94 to rotate during the revolution, which in turn causes the grinding sleeve 95 to rotate during the revolution. The roasted clinker discharged through the discharge end of the guide bucket 6 will fall on the top of the grinding screen 91. As the grinding mesh 91 and the drive shaft 94 revolve, the calcined clinker falls evenly on top of the grinding mesh 91. The calcined clinker falling on top of the grinding mesh 91 will enter the grinding section 92, so that the grinding sleeve 95, during its rotation, will work with the grinding section 92 to grind the calcined clinker. The water vapor formed by water quenching will moisten the calcined clinker, so that the grinding mesh 91 and the grinding sleeve 95 will perform wet grinding on the calcined clinker, further reducing the particle size of the calcined clinker, and allowing the vanadate in the calcined clinker to be better dissolved by purified water.

[0045] During this process, some of the roasted clinker enters the grinding sleeve 95 through the feed inlet 96, causing some of the roasted clinker to roll inside the grinding sleeve 95. At the same time, the crushing rod 97 inside the grinding sleeve 95 crushes the roasted clinker. The crushed roasted clinker is discharged through the feed inlet 96 and re-enters the grinding section 92, so that the grinding sleeve 95 and the grinding section 92 grind the crushed roasted clinker. This avoids the situation where some roasted clinker cannot enter between the grinding sleeve 95 and the grinding section 92, which would make it difficult to crush the roasted clinker. This further improves the processing quality and efficiency of roasted clinker.

[0046] Since the grinding mesh 91 and the grinding sleeve 95 revolve clockwise, and the jet pipe 822 is located in front of the grinding sleeve 95 revolving clockwise, and the jet pipe 822 is always in the jet state, the gas ejected by the jet pipe 822 through the jet hole 823 will pass through the grinding mesh 91 and the grinding sleeve 95 and act on the roasted clinker inside the grinding sleeve 95, so that the roasted clinker moves under the blowing action of the airflow, while preventing the grinding sleeve 95 and the grinding mesh 91 from being blocked, further accelerating the crushing efficiency of the roasted clinker, thereby facilitating the better dissolution of vanadate in the roasted clinker by purified water;

[0047] At the same time, the water vapor discharged from the air injection hole 833 and the air jet hole 823 will also pass through the grinding mesh 91 and the grinding sleeve 95, further blowing the roasted clinker, which will enhance the fluidity of the roasted clinker, thereby enabling the purified water to better dissolve the vanadates in the roasted clinker and improve the leaching efficiency of the vanadates in the roasted clinker.

[0048] A method for roasting and leaching vanadium slag includes the following steps:

[0049] Step 1: Close the drain pipe 4, and add room temperature clean water into the leaching tank 1 through the water inlet sleeve 2, so that the clean water is below the jet pipe 822;

[0050] Step 2: Add high-temperature roasted clinker into leaching tank 1 through feeding hopper 3, start air pump 71 to extract gas from leaching tank 1, and inject the extracted gas into leaching tank 1 through connecting pipe 73. Start motor 81 to drive rotating shaft 82 to rotate, which in turn drives jet pipe 822 and stirring plate 83 to rotate.

[0051] Step 3: The roasted clinker entering the leaching tank 1 will fall above the grinding screen 91 under the action of the guide bucket 6;

[0052] Step 4: Under the action of the guide bucket 6, the roasted clinker flows from one side to the other, causing it to fall on top of the grinding mesh 91. The roasted clinker that can pass through the grinding mesh 91 will enter the clean water. The roasted clinker entering the clean water will undergo a water quenching reaction, which will rapidly cool the high-temperature roasted clinker and break it into fine, uniform solid particles. The clean water will form water vapor under the action of the high-temperature roasted clinker. At this time, the water vapor formed will be discharged upward through the discharge end of the guide bucket 6. While impacting the roasted clinker, it will be filtered by the air pump 71 through the filter sleeve 72 and then drawn into the connecting pipe 73 and injected into the leaching tank 1 to heat the clean water. The clean water will absorb the vanadates carried in the water vapor, which will improve the leaching efficiency. The water vapor that enters the leaching tank 1 through the connecting pipe 73 will be discharged into the clean water in the water inlet sleeve 2 through the exhaust pipe 10. The clean water in the water inlet sleeve 2 will further absorb any residual vanadates in the gas, which will further improve the leaching efficiency. At the same time, it will prevent the gas from being discharged into the external environment and causing pollution to the external environment.

[0053] The operation of motor 81 will cause motor 81 to drive shaft 82 to rotate, which in turn drives jet pipe 822 and stirring plate 83 to rotate. Stirring plate 83 stirs the purified water and roasted clinker, so that the immersion water can better dissolve vanadate in the roasted clinker. During this process, water vapor discharged from connecting pipe 73 will enter airflow channel 821, and then enter jet pipe 822 and ventilation pipe 832 respectively. Water vapor entering jet pipe 822 will be sprayed into grinding mesh 91 and roasted clinker through jet hole 823, while water vapor entering ventilation pipe 832 will enter air injection pipe 831, and then be injected into purified water and roasted clinker through air injection hole 833. Heating purified water allows vanadate to dissolve quickly in purified water, which accelerates the dissolution efficiency of vanadate in roasted clinker and shortens leaching time.

[0054] The rotation of the rotating shaft 82 will cause the grinding screen 91 and the drive shaft 94 to rotate clockwise. The rotation of the drive shaft 94 will cause the gear 98 to move along the bottom of the gear ring 910. Since the gear 98 meshes with the gear ring 910, the gear 98 will rotate under the action of the gear ring 910, thereby causing the drive shaft 94 to rotate during the revolution, which in turn causes the grinding sleeve 95 to rotate during the revolution. The roasted clinker discharged through the discharge end of the guide bucket 6 will fall on the top of the grinding screen 91. As the grinding mesh 91 and the drive shaft 94 revolve, the calcined clinker falls evenly on top of the grinding mesh 91. The calcined clinker falling on top of the grinding mesh 91 will enter the grinding section 92, so that the grinding sleeve 95, during its rotation, will work with the grinding section 92 to grind the calcined clinker. The water vapor formed by water quenching will moisten the calcined clinker, so that the grinding mesh 91 and the grinding sleeve 95 will perform wet grinding on the calcined clinker, further reducing the particle size of the calcined clinker, and allowing the vanadate in the calcined clinker to be better dissolved by purified water.

[0055] During this process, some of the roasted clinker enters the grinding sleeve 95 through the feed inlet 96, causing some of the roasted clinker to roll inside the grinding sleeve 95. At the same time, the crushing rod 97 inside the grinding sleeve 95 crushes the roasted clinker. The crushed roasted clinker is discharged through the feed inlet 96 and re-enters the grinding section 92, so that the grinding sleeve 95 and the grinding section 92 grind the crushed roasted clinker. This avoids the situation where some roasted clinker cannot enter between the grinding sleeve 95 and the grinding section 92, which would make it difficult to crush the roasted clinker. This further improves the processing quality and efficiency of roasted clinker.

[0056] Since the grinding mesh 91 and the grinding sleeve 95 revolve clockwise, and the jet pipe 822 is located in front of the grinding sleeve 95 revolving clockwise, and the jet pipe 822 is always in the jet state, the gas ejected by the jet pipe 822 through the jet hole 823 will pass through the grinding mesh 91 and the grinding sleeve 95 and act on the roasted clinker inside the grinding sleeve 95, so that the roasted clinker moves under the blowing action of the airflow, while preventing the grinding sleeve 95 and the grinding mesh 91 from being blocked, further accelerating the crushing efficiency of the roasted clinker, thereby facilitating the better dissolution of vanadate in the roasted clinker by purified water;

[0057] At the same time, the water vapor discharged from the air injection hole 833 and the air jet hole 823 will also pass through the grinding mesh 91 and the grinding sleeve 95, further blowing the roasted clinker, which will enhance the fluidity of the roasted clinker, thereby enabling the purified water to better dissolve the vanadate in the roasted clinker and improve the leaching efficiency of the vanadate in the roasted clinker.

[0058] Step 5: After adding the roasted raw materials, close the feeding hopper 3;

[0059] Step 6: After the leaching time is reached, open drain pipe 4 to discharge the leaching agent and leaching residue;

[0060] Step 7: After filtering and separating the discharged leaching agent and leaching residue, an acid solution is added to the leaching agent to precipitate vanadium in the form of ammonium polyvanadate. After washing, drying and calcination, vanadium pentoxide product is finally obtained.

[0061] The embodiments described above are merely examples of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. A vanadium slag roasting and leaching device, comprising a leaching tank (1), a feeding hopper (3), a drain pipe (4), and a controller (5), characterized in that, Also includes: A guide bucket (6) is fixedly connected to the inner surface of the leaching tank (1) for guiding the flow of roasted clinker. A suction mechanism (7) is fixedly connected to the top of the leaching tank (1) for extracting hot air from inside the leaching tank (1). A stirring mechanism (8) is fixedly connected to the middle of the leaching tank (1) and fixedly connected to the air extraction mechanism (7). The stirring mechanism (8) is used to stir the roasted clinker and the leaching agent and inject hot gas into the roasted clinker and the leaching agent. A wet grinding mechanism (9) is fixedly connected to the outer surface of the stirring mechanism (8) for reducing the particle size of the roasted clinker. The wet grinding mechanism (9) is located below the guide bucket (6). The wet grinding mechanism (9) includes a fixed sleeve (93) that is rotatably and sealingly connected to the inner surface of the leaching tank (1). A grinding screen (91) is fixedly connected to the inner ring of the fixed sleeve (93). A downwardly recessed grinding part (92) is provided on the grinding screen (91). A drive shaft (94) is rotatably and sealingly connected through the fixed sleeve (93). A gear (98) is fixedly connected to one end of the drive shaft (94). The gear (98) is positioned... Inside the fixed sleeve (93), a grinding sleeve (95) is fixedly connected to the outer surface of the drive shaft (94). A crushing rod (97) is fixedly connected to the outer surface of the drive shaft (94) inside the grinding sleeve (95). A feed inlet (96) is provided on the grinding sleeve (95). The grinding sleeve (95) is located inside the grinding section (92). A fixing ring (99) is fixedly connected inside the leaching tank (1). The fixed sleeve (93) and the fixing ring (99) are sealed and rotatably connected. A gear ring (910) is fixedly connected to the bottom of the fixing ring (99). The gear ring (910) meshes with a gear (98).

2. The vanadium slag roasting and leaching equipment according to claim 1, characterized in that: The stirring mechanism (8) includes a motor (81) fixedly connected to the top of the leaching tank (1). The output end of the motor (81) is fixedly connected to a rotating shaft (82). The rotating shaft (82) passes through the guide bucket (6) and is rotatably connected to the guide bucket (6) in a sealed manner. The bottom of the rotating shaft (82) is rotatably connected to the inner bottom of the leaching tank (1). An airflow channel (821) is opened at the bottom of the rotating shaft (82). An air jet pipe (822) is fixedly connected to the side wall of the rotating shaft (82). The air jet pipe (822) is located below the grinding screen (91). The air jet pipe (822) communicates with the interior of the airflow channel (821). An air jet hole (823) is opened on the outer surface of the air jet pipe (822). An agitator plate (83) is fixedly connected to the outer surface of the rotating shaft (82). The agitator plate (83) is located below the air jet pipe (822).

3. The vanadium slag roasting and leaching equipment according to claim 2, characterized in that: An air injection pipe (831) is fixedly connected to the stirring plate (83), an air injection hole (833) is opened on the air injection pipe (831), and a vent pipe (832) is fixedly connected to the air injection pipe (831). The vent pipe (832) is fixedly connected to the rotating shaft (82), and the vent pipe (832) is connected to the inside of the airflow channel (821).

4. The vanadium slag roasting and leaching equipment according to claim 2, characterized in that: The rotating shaft (82) passes through the grinding mesh (91) and is fixedly connected to the grinding mesh (91), and the transmission shaft (94) is rotatably connected to the rotating shaft (82).

5. The vanadium slag roasting and leaching equipment according to claim 2, characterized in that: The air extraction mechanism (7) includes an air pump (71) fixedly connected to the top of the leaching tank (1). The air pump (71) has a filter sleeve (72) fixedly connected to its air extraction end and a connecting pipe (73) fixedly connected to its exhaust end. The filter sleeve (72) is located inside the leaching tank (1). The connecting pipe (73) is fixedly connected to the leaching tank (1) and is also connected to the inside of the airflow channel (821).

6. The vanadium slag roasting and leaching equipment according to claim 1, characterized in that: The feeding hopper (3) is fixedly connected to the top of the leaching tank (1), the drain pipe (4) is fixedly connected to the bottom of the leaching tank (1), and the controller (5) is fixedly connected to the top of the leaching tank (1).

7. The vanadium slag roasting and leaching equipment according to claim 1, characterized in that: The outer surface of the leaching tank (1) is fixedly connected to a water inlet sleeve (2). The side wall of the leaching tank (1) is provided with a communication port (11). The leaching tank (1) is connected to the inside of the water inlet sleeve (2) through the communication port (11). The side wall of the leaching tank (1) is fixedly connected to an exhaust pipe (10). The exhaust pipe (10) extends into the water inlet sleeve (2). The air inlet end of the exhaust pipe (10) is located below the guide bucket (6). The top of the water inlet sleeve (2) is higher than the bottom of the guide bucket (6).

8. A method for roasting and leaching vanadium slag, based on the vanadium slag roasting and leaching equipment according to any one of claims 1-7, characterized in that, Includes the following steps: Step 1: Close the drain pipe (4) and add room temperature leaching agent into the leaching tank (1) through the water inlet sleeve (2); Step 2: Add roasted calcined material into the leaching tank (1) through the feeding hopper (3), and at the same time start the air pump (71) and motor (81) to make the wet grinding mechanism (9) and stirring plate (83) work; Step 3: The roasted clinker entering the leaching tank (1) will fall above the grinding screen (91) under the action of the guide bucket (6); Step 4: When the roasted clinker enters the leaching agent, the leaching agent will partially evaporate under the action of high temperature. The water vapor formed by evaporation will be injected into the airflow channel (821) by the air pump (71) through the connecting pipe (73), and then sprayed into the leaching agent through the air injection pipe (831). Step 5: After adding the roasted raw material, close the feeding hopper (3); Step 6: After the leaching time is reached, open the drain pipe (4) to discharge the leaching agent and leaching residue; Step 7: After filtering and separating the discharged leaching agent and leaching residue, an acid solution is added to the leaching agent to precipitate vanadium in the form of ammonium polyvanadate. After washing, drying and calcination, vanadium pentoxide product is finally obtained.

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