A gravity separation device for comprehensive treatment of vanadium-titanium magnetite by fluidized hydrogen reduction-electric furnace smelting

Abstract

The invention discloses a gravity separation device for fluidized hydrogen reduction-electric furnace smelting and comprehensive treatment of vanadium-titanium magnetite. Through the mutual cooperation of a screening component, an aeration component and a retention component, the material stays on the concave surface of the screening component for a longer time, and the material rolls and jumps on the surface of a vibrating filter plate, thereby further improving the screening effect of the screening component on the material, and the aeration components on both sides vibrate at intervals so that the vibrating filter plate swings left and right inside the gravity separator body, further improving the screening effect.

Description

Technical Field

[0001] The present invention relates to the technical field of vanadium-titanium magnetite processing, and more specifically, to a method for comprehensive processing of vanadium-titanium magnetite by fluidized hydrogen reduction-electric furnace smelting. Background Art

[0002] Vanadium-titanium magnetite is recognized by countries around the world as an important strategic resource. Its main components, such as iron, vanadium, titanium and other valuable metals, are widely used in steel manufacturing, aerospace, medical and military fields, and have extremely high comprehensive utilization value. my country's vanadium-titanium magnetite resource reserves are about 30 billion tons, ranking third in the world; among them, the vanadium-titanium magnetite reserves in the Panxi region are about 10 billion tons, accounting for about 20% of the country's iron ore reserves, 62% of the country's vanadium reserves, and 90% of the country's titanium reserves. Vanadium-titanium magnetite is an important strategic resource for both the steel industry and the nonferrous industry. It is of great significance to achieve its efficient development and comprehensive utilization in the two major industries.

[0003] The "blast furnace-converter method" is currently the mainstream process for smelting and separating vanadium-titanium magnetite concentrate in China. The specific process flow is to agglomerate the vanadium-titanium magnetite concentrate and then send it into a blast furnace for smelting, with coke and coal injection as reducing agents and fuels. During the smelting process, part of the vanadium oxide is reduced and enters the molten iron to become vanadium-containing molten iron; the vanadium-containing molten iron is blown in a converter and separated into vanadium slag and semi-steel. Vanadium is extracted from the vanadium slag through a wet leaching process, and the semi-steel is then processed in a converter to obtain molten steel. Titanium enters the blast furnace slag to form high-titanium slag (w(TiO2)>20%), which cannot be recycled. The "blast furnace-converter method" can effectively recover iron and part of the vanadium in vanadium-titanium magnetite, and has the advantages of mature technology, high production efficiency, and huge production capacity.

[0004] In today's era of advocating energy conservation, emission reduction and environmentally friendly development, the disadvantages of the traditional "blast furnace-converter method" are becoming increasingly obvious. The "blast furnace-converter method" of vanadium-titanium magnetite has obvious disadvantages such as long process flow, high energy consumption, high dependence on coke resources, difficulty in further improving the utilization rate of vanadium valuable components, and inability to achieve the recovery and utilization of titanium elements. In addition, during the smelting process, due to the presence of TiO2 in the slag, the smelting process often leads to serious foam slag and iron loss, resulting in smelting difficulties, making it difficult to realize the utilization of slag, and making it impossible to recover titanium resources, resulting in a low comprehensive utilization rate of vanadium-titanium magnetite.

[0005] To this end, we proposed a method for comprehensive treatment of vanadium-titanium magnetite by fluidized hydrogen reduction-electric furnace smelting to solve the above problems.

[0006] In order to overcome the above-mentioned defects of the prior art, an embodiment of the present invention provides a method for comprehensive treatment of vanadium-titanium magnetite by fluidized hydrogen reduction-electric furnace smelting to solve the problems raised in the above-mentioned background technology.

[0007] To achieve the above object, the present invention provides the following technical solution: a method for comprehensive treatment of vanadium-titanium magnetite by fluidized hydrogen reduction-electric furnace smelting, which specifically comprises the following steps:

[0008] Step 1: Reduction: Place vanadium-titanium magnetite concentrate powder with a particle size of ≤1mm in a fluidized bed. First, introduce a certain volume of protective gas from the bottom of the bed. While exhausting the air in the bed, the material is in a good fluidized state. When preheated to a certain reaction temperature, introduce reducing gas and start fluidized hydrogen reduction to obtain a reduced product with a high metallization rate.

[0009] Step 2: Melting, mixing the obtained reduced material and calcium oxide evenly to prepare alkaline molten material, placing it in an electric furnace; separating under certain melting conditions, introducing a certain volume of protective gas during the melting process, and finally generating pig iron and vanadium-titanium slag;

[0010] Step 3: Blowing vanadium, blowing vanadium into the vanadium-titanium slag through a converter, and naturally cooling it to room temperature, so that the vanadium element mainly exists in the form of V2O5, and the titanium element mainly exists in the form of TiO2 in the slag, wherein the crystal size of TiO2 is increased, which is conducive to the subsequent separation of titanium concentrate;

[0011] Step 4: separation and selection of titanium concentrate. The naturally air-cooled vanadium-containing titanium slag is crushed and ground into powder of a certain particle size to fully dissociate TiO2. The powder is then placed in a gravity separation device for separation and enrichment. The resulting concentrate is TiO2 concentrate, and the tailings are vanadium-containing tailings.

[0012] Step 5: Acid leaching. The vanadium-containing tailings are subjected to acid leaching. Under certain leaching conditions, a vanadium-containing solution (V5+) and leached residue are obtained. The leached residue is washed and dried and used as a cement additive. Ultimately, the effective separation and utilization of iron, vanadium and titanium are achieved, the comprehensive utilization rate of vanadium-titanium magnetite is improved, and technical support is provided for its efficient development and utilization.

[0013] In a preferred embodiment, the vanadium-titanium magnetite concentrate powder in step one has an iron grade of TFe 45-60%, and contains, by mass percentage, FeO 5-15%, TiO2 5-20%, V2O5 0.2-2%, SiO2 1.5-10%, Al2O3 1.5-10%, CaO0.05-1.5%, MgO 0.5-10%, P<0.05%, and S<0.006%.

[0014] In a preferred embodiment, the protective gas in the step one is nitrogen with a flow rate of 500-1000mL / min, the reducing gas is a mixed gas composed of hydrogen and nitrogen, the volume percentage of hydrogen in the mixed gas is ≥60%, and the gas flow rate is 800-1100mL / min; the protective gas used in the melting process of the step two is argon with a gas flow rate of 1000-2000mL / min; the recovery rate of Fe in the pig iron obtained by melting is ≥90%, and the natural air cooling residence time of the vanadium-titanium slag is ≥5h.

[0015] In a preferred embodiment, the vanadium-titanium magnetite concentrate powder in step one is heated to 750-900°C in the fluidized bed, the reduction time is 20-40min, and the metallization rate of the fluidized hydrogen reduction product of the vanadium-titanium magnetite is ≥80%; the alkaline molten material prepared by mixing the reducing material and calcium oxide in step two has a binary alkalinity (calculated as mass percentage): R=W(CaO) / W(SiO2)=1.0-1.5; when the alkaline molten material is melted in an electric furnace, the melting temperature is 1400-1600°C, and the melting time is ≥40min.

[0016] In a preferred embodiment, in step 4, the portion of the vanadium-titanium slag with a particle size of less than 0.074 mm accounts for 60%-90% of the total mass, and the gravity separation equipment used is set as a shaking table, and the final recovery rate of TiO2 in the titanium concentrate is ≥46%; in step 5, the sulfuric acid concentration is ≥10%, the leaching time is ≥2d, the leaching temperature is 20-50°C, and the liquid-solid ratio is 2:1-3:1, and the final recovery rate of V is ≥60%.

[0017] In a preferred embodiment, it also includes a gravity separation device for fluidized hydrogen reduction-electric furnace smelting comprehensive treatment of vanadium-titanium magnetite as described in any one of the above, including a gravity separator body 1 and side shells 3 located on both sides of a feed port 2, the top of the gravity separator body 1 is connected to the feed port 2, and connecting through holes 17 are provided on both sides of the gravity separator body 1, a screening component is installed inside the gravity separator body 1, a diagonal support block 21 is provided below the screening component, a first outlet 22 is provided on the side wall of the gravity separator body 1 corresponding to the diagonal support block 21, a second outlet 23 is provided on the gravity separator body 1 at a position on one side of the screening component, a retention component is installed above the screening component, an aeration cavity 19 is provided inside the side shells 3 on both sides of the feed port 2, and an aeration component is installed inside the aeration cavity 19;

[0018] The screening assembly includes a vibrating filter plate 14 located inside the gravity separator body 1, and inclined blocks 15 hinged to the inner side wall of the gravity separator body 1 are symmetrically arranged at the upper and lower ends of the vibrating filter plate 14, and the two ends of the vibrating filter plate 14 are connected to swing blocks 18 through connecting through holes 17.

[0019] In a preferred embodiment, the cross-section of the connecting through hole 17 is arranged to be trapezoidal, with the shorter plane facing the interior of the gravity separator body 1, and the end of the vibrating filter plate 14 extends into the connecting through hole 17. The middle position of the vibrating filter plate 14 is rotatably connected to the side wall of the gravity separator body 1 through a rotating shaft, and arc-shaped grooves 20 are provided on the upper and lower side walls at both ends of the vibrating filter plate 14 at positions corresponding to the ends of the inclined stop block 15, and the end shape of the inclined stop block 15 is arranged to be an arc that matches the arc-shaped groove 20.

[0020] In a preferred embodiment, the aeration assembly includes a transfer box 5 located inside the aeration cavity 19 and an air pump 4 located on one side of the side shell 3 on both sides of the feeding port 2, the air pump 4 and the transfer box 5 are connected by a pipeline, and a plurality of aeration pipes 6 are distributed in a linear array at the top of the transfer box 5, and the aeration pipes 6 are connected to the transfer box 5.

[0021] In a preferred embodiment, the first rotating shaft 8 and the second rotating shaft 11 are installed inside the adapter box 5, and the first rotating shaft 8 and the second rotating shaft 11 are rotatably connected to the inner side walls of the side shell body 3 on both sides of the loading port 2. A plurality of sealed boxes 7 connected to the aeration pipe 6 are installed on the top of the adapter box 5, and the upper and lower ends of the sealed box 7 are both provided with openings. The first rotating shaft 8 and the second rotating shaft 11 are arranged up and down and distributed below the sealed box 7. The first rotating shaft 8 is linearly provided with the same number of intermittent shielding components as the aeration pipe 6 on the outside, and the intermittent shielding components include four arc-shaped baffles 9 distributed circumferentially on the outside of the first rotating shaft 8. The first rotating shaft 8 is equidistantly installed with the same number of transmission gears 10 as the aeration pipe 6 on the outside, and the transmission gear 10 is spaced apart from the arc-shaped baffles 9. Cross cams 12 are installed at the two ends of the second rotating shaft 11 at the positions corresponding to the transmission gears 10, and the cross cams 12 are adapted to the transmission gear 10.

[0022] In a preferred embodiment, the retention component includes an air duct 16 symmetrically installed on the two side walls of the gravity separator body 1, and a replaceable air filter 26 is installed at the end of the air duct 16. A middle partition 24 is installed inside the air duct 16, and a number of fans 25 are evenly distributed on the middle partition 24. At least one air hole 27 is opened on the side wall of the gravity separator body 1 at the position corresponding to the air duct 16, and the air duct 16 is connected to the aeration cavity 19 through the air hole 27.

[0023] Technical effects and advantages of the present invention:

[0024] Compared with the prior art, the process designed by the present invention addresses the obvious drawbacks of the traditional "blast furnace-converter method" for treating vanadium-titanium magnetite. The comprehensive utilization recovery rate of vanadium-titanium magnetite can be improved. The present invention can directly process fine-grained powder ore, has high reduction efficiency, good heat exchange, low environmental pollution, and can effectively separate and recover valuable elements such as iron, vanadium, and titanium in the main components. Specifically, firstly, the vanadium-titanium magnet is pre-reduced to a metallization rate of ≥80% using fluidized hydrogen reduction technology, and then the pre-reduction product is melted in an electric furnace to separate pig iron and vanadium-containing titanium slag; the vanadium-containing titanium slag is slowly cooled by self-heating after vanadium is blown in the converter, and titanium concentrate TiO2 and vanadium-containing tailings are obtained after "crushing-grinding-gravity separation" separation; the vanadium-containing tailings are subjected to acid leaching to extract vanadium, and finally a vanadium-containing solution and leached slag are obtained, and the leached slag is used as a cement additive. Therefore, this method greatly improves the comprehensive utilization rate of vanadium-titanium magnetite;

[0025] Through the overall structure of the gravity separator, compared with the prior art, the material stays on the concave surface of the screening component for a longer time through the mutual cooperation of the screening component, the aeration component and the retention component. At the same time, the material rolls and jumps on the surface of the vibrating filter plate 14, thereby further improving the screening effect of the screening component on the material. The aeration components on both sides vibrate at intervals so that the vibrating filter plate 14 swings left and right inside the gravity separator body 1, further improving the screening effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a roadmap for the method of comprehensive treatment of vanadium-titanium magnetite by fluidized hydrogen reduction-electric furnace smelting proposed in the present invention.

[0027] Figure 2 This is a schematic diagram of the overall structure of the gravity separation equipment proposed in the present invention.

[0028] Figure 3 This is a schematic structural diagram of the gravity sorting equipment proposed in the present invention after the side shell is removed.

[0029] Figure 4 This is a schematic diagram of the structure of the aeration assembly proposed in the present invention.

[0030] Figure 5 This is a schematic diagram of the internal structure of the transfer box proposed by the present invention.

[0031] Figure 6 A vertical cross-sectional view of the aeration assembly proposed for the present invention.

[0032] Figure 7 For the present invention Figure 6 A truncated schematic diagram of .

[0033] Figure 8 For the present invention Figure 6 A magnified view of the structure in the middle.

[0034] Fig. 9 This is a schematic diagram of the cross-sectional structure of the gravity separator body proposed in the present invention.

[0035] The accompanying drawings are marked as follows: 1. gravity separator body; 2. feeding port; 3. side shell; 4. air pump; 5. adapter box; 6. aeration pipe; 7. sealing box; 8. first rotating shaft; 9. arc-shaped baffle; 10. transmission gear; 11. second rotating shaft; 12. cross cam; 13. servo motor; 14. vibrating filter plate; 15. oblique block; 16. air duct; 17. connecting through hole; 18. swing block; 19. aeration cavity; 20. arc-shaped groove; 21. oblique support block; 22. first outlet; 23. second outlet; 24. middle partition; 25. fan; 26. air filter; 27. air vent. DETAILED DESCRIPTION

[0036] 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

[0037] As attached Figure 1 As shown, this embodiment provides a method for comprehensive treatment of vanadium-titanium magnetite by fluidized hydrogen reduction-electric furnace smelting, which specifically includes the following steps:

[0038] Step 1: Reduction: Place the vanadium-titanium magnetite concentrate powder with a particle size of ≤1mm in a fluidized bed. First, introduce a certain volume of protective gas from the bottom of the bed. While exhausting the air in the bed, the material is in a good fluidized state. When preheated to a certain reaction temperature, introduce reducing gas and start fluidized hydrogen reduction to obtain a reduced product with a high metallization rate.

[0039] The vanadium-titanium magnetite concentrate powder has an iron grade of TFe 45-60%, and contains FeO 5-15%, TiO2 5-20%, V2O5 0.2-2%, SiO2 1.5-10%, Al2O3 1.5-10%, CaO 0.05-1.5%, MgO 0.5-10%, P<0.05%, S<0.006%, the protective gas is nitrogen, and its flow rate is 500-1000mL / min, the reducing gas is a mixed gas composed of hydrogen and nitrogen, the volume percentage of hydrogen in the mixed gas is ≥60%, and the gas flow rate is 800-1100mL / min; the vanadium-titanium magnetite concentrate powder is heated at a temperature of 750-900°C in a fluidized bed, the reduction time is 20-40min, and the metallization rate of the vanadium-titanium magnetite fluidized hydrogen reduction product is ≥80%;

[0040] Step 2: Melting, the obtained reduction material and calcium oxide are mixed evenly to make an alkaline melting material, which is placed in an electric furnace; separation is carried out under certain melting conditions, and a certain volume of protective gas is introduced during the melting process, and finally pig iron and vanadium-titanium slag are generated.

[0041] The protective gas used in the melting process of step 2 is argon, and the gas flow rate is 1000-2000mL / min; the recovery rate of Fe in the pig iron obtained by melting is ≥90%, and the natural air cooling residence time of the vanadium-titanium slag is ≥5h; the alkaline melting material obtained by mixing the reducing material and calcium oxide has a binary basicity (calculated by mass percentage): R=W(CaO) / W(SiO2)=1.0-1.5; when the alkaline melting material is melted in an electric furnace, the melting temperature is 1400-1600℃, and the melting time is ≥40min;

[0042] Step 3: Blowing vanadium, blowing vanadium into the vanadium-titanium slag through a converter, and naturally cooling it to room temperature, so that the vanadium element mainly exists in the form of V2O5, and the titanium element mainly exists in the form of TiO2 in the slag, wherein the crystal size of TiO2 is increased, which is conducive to the subsequent separation of titanium concentrate;

[0043] Step 4: separation and selection of titanium concentrate. The naturally air-cooled vanadium-containing titanium slag is crushed and ground into powder of a certain particle size to fully dissociate TiO2. The powder is then placed in a gravity separation device for separation and enrichment. The resulting concentrate is TiO2 concentrate, and the tailings are vanadium-containing tailings.

[0044] Among them, the part of vanadium-titanium slag with a particle size of less than 0.074 mm accounts for 60%-90% of the total mass, and the gravity separation equipment used is set as a shaking table, and the final recovery rate of TiO2 in the titanium concentrate is ≥46%;

[0045] Step 5: Acid leaching: The vanadium-containing tailings are acidically leached to obtain a vanadium-containing solution (V5+) and leached residue under certain leaching conditions. The leached residue is washed and dried and used as a cement additive. Finally, the effective separation and utilization of iron, vanadium and titanium are achieved, the comprehensive utilization rate of vanadium-titanium magnetite is improved, and technical support is provided for its efficient development and utilization.

[0046] In the step 5, the sulfuric acid concentration is ≥10%, the leaching time is ≥2d, the leaching temperature is 20-50°C, and the liquid-solid ratio is 2:1-3:1, and the final V recovery rate is ≥60%. Example

[0047] This embodiment provides a gravity sorting device, as shown in the attached Figure 2-9 As shown, the method for comprehensive treatment of vanadium-titanium magnetite by fluidized hydrogen reduction-electric furnace smelting provided in Example 1 comprises a gravity separator body 1 and side shells 3 located on both sides of a feeding port 2, the top of the gravity separator body 1 is connected to the feeding port 2, and the vanadium-titanium slag to be sorted is loaded into the gravity separator body 1 through the feeding port 2, and connecting through holes 17 are provided on both sides of the gravity separator body 1, a screening assembly is installed inside the gravity separator body 1, a diagonal support block 21 is provided below the screening assembly, and a first outlet 22 is provided on the side wall of the gravity separator body 1 corresponding to the diagonal support block 21, and the gravity separator body The body 1 is provided with a second outlet 23 at a position on one side of the screening component, a retention component is installed above the screening component, an aeration cavity 19 is provided inside the side shell 3 on both sides of the feeding port 2, and an aeration component is installed inside the aeration cavity 19. Other parts related to sorting inside the gravity separator body 1 can adopt conventional technologies in existing gravity sorting devices, which will not be described in detail here and are not shown in the drawings. The screening component is used to screen the input materials with higher precision, the aeration component is used to make the screening component work, and the retention component is used to make the materials stay longer above the screening component;

[0048] The screening component includes a vibrating filter plate 14 located inside the gravity separator body 1. Oblique stops 15 hinged to the inner side wall of the gravity separator body 1 are symmetrically arranged at the upper and lower ends of the vibrating filter plate 14. Both ends of the vibrating filter plate 14 are connected with swing blocks 18 through connecting holes 17. When the swing block 18 is pushed by gas, the swing block 18 tilts upward under the thrust, and the swing block 18 drives the vibrating filter plate 14 to tilt upward, so that the material on the surface of the vibrating filter plate 14 rolls, and then the material is vibrated and screened off on the surface of the vibrating filter plate 14, so that the screening effect is better and the screening rate is higher.

[0049] Specifically, the cross-section of the connecting through-hole 17 is set to be trapezoidal, and the shorter plane faces the interior of the gravity separator body 1. When the swing block 18 rotates, since the rotation angle of the swing block 18 will be greater than the rotation angle of the vibrating filter plate 14, the swing block 18 with a trapezoidal cross-section will be more convenient for the tilting of the swing block 18 and the vibrating filter plate 14. The end of the vibrating filter plate 14 extends into the interior of the connecting through-hole 17, and the middle position of the vibrating filter plate 14 is rotatably connected to the side wall of the gravity separator body 1 through a rotating shaft. When the vibrating filter plate 14 is driven to tilt by the swing block 18 on one side, since the middle part of the vibrating filter plate 14 is fixed, the vibrating filter plate 14 will swing around the rotation of the middle position inside the gravity separator body 1. Arc-shaped grooves 20 are provided on the upper and lower side walls of the two ends of the vibrating filter plate 14 at positions corresponding to the ends of the oblique stopper 15, and the shape of the end of the oblique stopper 15 is set to be opposite to the arc-shaped groove 20 The two oblique blocks 15 can be adapted to fit the upper and lower side walls of the vibrating filter plate 14 when the vibrating filter plate 14 does not swing, so that the material on the surface of the vibrating filter plate 14 is separated from the connecting through hole 17. When the vibrating filter plate 14 swings upward, the upper oblique block 15 will be driven by the vibrating filter plate 14 to rotate upward, and at the same time, the end of the oblique block 15 slides out of the arc-shaped groove 20 to push the material to the other side. When the vibrating filter plate 14 returns to its original position, the upper oblique block 15 is reset and the end enters the arc-shaped groove 20, thereby continuing to separate the connecting through hole 17 from the material. At the same time, the oblique block 15 at the other end will slide to a position close to the connecting through hole 17, and slide back to its original position when the vibrating filter plate 14 is reset, thereby continuously blocking the connecting through hole 17, so that the connecting through hole 17 is separated from the material at the temporal part of the gravity separator body 1.

[0050] Furthermore, the aeration assembly includes a transfer box 5 located inside the aeration cavity 19 and an air pump 4 located on one side of the side shell 3 on both sides of the feeding port 2. The air pump 4 and the transfer box 5 are connected by a pipeline. A plurality of aeration pipes 6 are distributed in a linear array on the top of the transfer box 5. The aeration pipes 6 are connected to the transfer box 5. The interior of the swing block 18 is set as an empty groove. The gas ejected from the aeration pipe 6 will be sprayed into the empty groove inside the swing block 18, and then the swing block 18 will be pushed to move upward. Then, the gas in the groove will escape upward, and the inside of the aeration pipe 6 will be The gas will push the swing block 18 to move upward. When the gas inside the aeration pipe 6 stops spraying, the swing block 18 will reset under the action of gravity. At the same time, the aeration components on both sides will spray at intervals, so that the vibrating filter plate 14 will continuously swing inside the gravity separator body 1, thereby causing the material above the vibrating filter plate 14 to continuously move. At the same time, due to the continuous swinging of the vibrating filter plate 14, the surface of the vibrating filter plate 14 will also produce a certain vibration, thereby causing the rolling material to jump above the vibrating filter plate 14, thereby further enhancing the screening effect of the material.

[0051] It is worth mentioning that a first rotating shaft 8 and a second rotating shaft 11 are installed inside the transfer box body 5, and the first rotating shaft 8 and the second rotating shaft 11 are rotatably connected to the inner side walls of the side shell body 3 on both sides of the feeding port 2. A plurality of sealed boxes 7 connected to the aeration pipe 6 are installed on the top of the transfer box body 5, and openings are provided at the upper and lower ends of the sealed box body 7. The first rotating shaft 8 and the second rotating shaft 11 are arranged up and down and distributed below the sealed box body 7. The first rotating shaft 8 is linearly provided with the same number of intermittent shielding components as the aeration pipe 6 on the outside. The intermittent shielding components include four arc-shaped baffles 9 circumferentially distributed on the outside of the first rotating shaft 8. The first rotating shaft 8 is equidistantly installed with the same number of transmission gears 10 as the aeration pipe 6 on the outside, and the transmission gear 10 is spaced apart from the arc-shaped baffles 9. Cross cams 12 are installed at the two ends of the second rotating shaft 11 at the positions corresponding to the transmission gears 10. The cross cam 12 is adapted to the transmission gear 10, and the rotation of the second rotating shaft 11 is controlled by a servo motor 13. Every rotation of the second rotating shaft 11 When the gear 10 rotates a quarter of a turn, the cross cam 12 will be driven to rotate a quarter of a turn, thereby driving the transmission gear 10 to rotate a quarter of a turn, and further driving the first rotating shaft 8 to rotate a quarter of a turn, thereby driving the arc baffle 9 to rotate a quarter of a turn, so that the arc surface of the outer wall of the arc baffle 9 fits with the arc surface at the bottom of the sealing box 7, thereby blocking the sealing box 7, the lower opening of the sealing box 7 is blocked, and the aeration pipe 6 stops spraying gas. During the other rotation time intervals, the transmission gear 10 leaves the opening of the sealing box 7, so that the opening at the bottom of the sealing box 7 is connected with the transfer box 5, so that the aeration pipe 6 sprays gas, and because the arc surface on the outer side of the arc baffle 9 occupies one eighth of the circular surface, during the time interval of the cross cam 12 rotating a quarter of a circle, the arc baffle 9 blocks the opening at the bottom of the sealing box 7 for half of the time, and the opening at the bottom of the sealing box 7 is connected with the transfer box 5 for the other half of the time, thereby achieving the effect of intermittent jetting.

[0052] It is worth noting that the retention component includes an air duct 16 symmetrically installed on the two side walls of the gravity separator body 1, a replaceable air filter 26 is installed at the end of the air duct 16, a middle partition 24 is installed inside the air duct 16, and a number of fans 25 are evenly distributed on the middle partition 24. At least one air hole 27 is opened at the position of the side wall of the gravity separator body 1 corresponding to the air duct 16, and the air duct 16 is connected to the aeration cavity 19 through the air hole 27. The gas that escapes to the top of the swing block 18 passes through the air hole 27 and then enters the fan 25. Since there is more gas inside the aeration cavity 19, the gas will flow from the air hole 27 to the outside of the air duct 16, so that the air hole 27 drives the fan 25 Grab Da Beinong, and then form an eddy current, and blow it to the top of the vibrating filter plate 14 through the filter net 26, so that the particles above the vibrating filter plate 14 are blown to one side due to the vibration, and at the same time, the DC components on the other side also convey eddy currents, and the eddy currents in opposite directions are symmetrical, and more eddy currents are generated at the position above the vibrating filter plate 14 inside the gravity separator body 1, so that the materials with smaller particles move further irregularly above the vibrating filter plate 14 and stay longer, so that the separation effect of the materials is better, and the chaotic eddy currents will bring the dust to the position of the second outlet 23 and separate it from the second outlet 23, so that the screening effect of the material is better and the composition of the screened material is higher.

[0053] Working principle of the present invention:

[0054] Refer to the instruction manual Figure 2-9 First, the material to be screened is added into the gravity separator body 1 through the feeding port 2, and then the screening equipment works, the aeration component sprays gas intermittently, and the aeration components on both sides also spray gas intermittently, and the vibrating filter plate 14 in the screening component constantly swings left and right, and the surface produces a certain vibration, which greatly improves the screening effect. At the same time, the gas generated by the aeration component forms a vortex and a counter-attack above the vibrating filter plate 14 through the retention component, and further discharges the dust added to the gravity separator body 1 together with the material, and then the component content ratio of the screened material, and at the same time, the vortex is used to change the movement trend of the jumping material, so that the material stays in the vibrating filter plate 14 for a longer time, and the contact rate with the vibrating filter plate 14 is accelerated and irregular, thereby reducing the blockage on the surface of the vibrating filter plate 14, thereby improving the screening efficiency.

[0055] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, which may refer to mechanical connection or electrical connection, or internal communication between two components, or direct connection. "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change;

[0056] Secondly: In the drawings of the embodiments disclosed in the present invention, only the structures related to the embodiments disclosed in the present invention are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other;

[0057] Finally: The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A gravity separation device for comprehensive treatment of vanadium-titanium magnetite by fluidized hydrogen reduction-electric furnace smelting, characterized in that: The gravity separator comprises a gravity separator body (1) and side shells (3) located on both sides of a feeding port (2), wherein the top of the gravity separator body (1) is connected to the feeding port (2), and both sides of the gravity separator body (1) are provided with connecting through holes (17), a screening component is installed inside the gravity separator body (1), a diagonal support block (21) is provided below the screening component, a first outlet (22) is provided on the side wall of the gravity separator body (1) corresponding to the diagonal support block (21), a second outlet (23) is provided on the gravity separator body (1) at a position on one side of the screening component, a retention component is installed above the screening component, an aeration cavity (19) is provided inside the side shells (3) on both sides of the feeding port (2), and an aeration component is installed inside the aeration cavity (19); The screening assembly comprises a vibrating filter plate (14) located inside the gravity separator body (1), oblique stoppers (15) hinged to the inner side wall of the gravity separator body (1) are symmetrically arranged at the upper and lower ends of the vibrating filter plate (14), and the two ends of the vibrating filter plate (14) are connected to swing blocks (18) through connecting through holes (17); The cross section of the connecting through hole (17) is arranged to be trapezoidal, with the shorter plane facing the interior of the gravity separator body (1); the end of the vibrating filter plate (14) extends into the interior of the connecting through hole (17); the middle position of the vibrating filter plate (14) is rotatably connected to the side wall of the gravity separator body (1) via a rotating shaft; arc-shaped grooves (20) are provided on the upper and lower side walls of both ends of the vibrating filter plate (14) at positions corresponding to the ends of the inclined stopper (15); and the end shape of the inclined stopper (15) is arranged to be an arc shape that matches the arc-shaped groove (20); The aeration assembly comprises a transfer box (5) located inside the aeration inner cavity (19) and an air pump (4) located on one side of the side shell (3) on both sides of the feeding port (2), the air pump (4) and the transfer box (5) are connected via a pipeline, a plurality of aeration pipes (6) are distributed in a linear array at the top of the transfer box (5), and the aeration pipes (6) are connected to the transfer box (5); A first rotating shaft (8) and a second rotating shaft (11) are installed inside the transfer box (5). The first rotating shaft (8) and the second rotating shaft (11) are rotatably connected to the inner side walls of the side shells (3) on both sides of the feeding port (2). A plurality of sealed boxes (7) connected to the aeration pipes (6) are installed at the top of the transfer box (5). The upper and lower ends of the sealed boxes (7) are both provided with openings. The first rotating shaft (8) and the second rotating shaft (11) are arranged up and down and distributed below the sealed boxes (7). The first rotating shaft (8) is linearly arranged outside. An intermittent shielding assembly having the same number as the aeration tubes (6) is arranged, the intermittent shielding assembly comprising four arc-shaped baffles (9) circumferentially distributed on the outside of the first rotating shaft (8), transmission gears (10) having the same number as the aeration tubes (6) are equidistantly installed on the outside of the first rotating shaft (8), the transmission gears (10) and the arc-shaped baffles (9) are arranged at intervals, and cross cams (12) are installed at both ends of the second rotating shaft (11) at positions corresponding to the transmission gears (10), and the cross cams (12) are adapted to the transmission gears (10); The retention assembly comprises an air duct (16) symmetrically mounted on two side walls of a gravity separator body (1), a replaceable air filter (26) being mounted on the end of the air duct (16), a middle partition (24) being mounted inside the air duct (16), a plurality of fans (25) being equidistantly distributed on the middle partition (24), at least one air vent (27) being provided on the side wall of the gravity separator body (1) at a position corresponding to the air duct (16), and the air vent (16) being connected to the aeration inner cavity (19) via the air vent (27).

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