Method for removing iron and enriching vanadium from vanadium extraction tailings and spiral separation equipment

Abstract

The invention relates to the technical field of vanadium extraction, in particular to a method for removing iron and enriching vanadium from vanadium extraction tailings and spiral separation equipment, the spiral separation equipment comprises a spiral separation structure and a supporting and protecting structure, and the supporting and protecting structure is connected to the side end of the spiral separation structure; the spiral separation structure is used for separation work and can conduct angle adjustment on the supporting protection structure, the motor drives a spiral rod base to rotate through a speed reducer to conduct separation work, and the lower end of the carrying groove frame conducts limiting and fixing of a separation base and a clamping fixing frame through a first limiting mechanism and a second limiting mechanism; therefore, the separation seat and the separation guide groove frame are convenient to replace; and the supporting protection structure is used for adjusting the position of the spiral separation structure, the electric control telescopic rod enables the spiral separation structure to rotate on the hinged matching seat through stretching out and drawing back, and meanwhile the driven telescopic rod supports and protects the other side. Through the arrangement of the structure, spiral separation work is achieved, and meanwhile vanadium extraction work is facilitated.

Description

Technical Field

[0001] This invention relates to the field of vanadium extraction technology, specifically a method for removing iron and enriching vanadium from vanadium extraction tailings and a spiral separation device. Background Technology

[0002] Vanadium tailings are industrial solid waste generated after vanadium-titanium magnetite is smelted in a blast furnace and selectively oxidized to extract vanadium. They have a complex composition and low vanadium content. The content is about 0.5%-2%, and the iron is in the spinel phase ( The encapsulation of vanadates in the form of vanadates leads to the following problems in traditional pyrometallurgical reduction or wet leaching processes:

[0003] Selective reduction is difficult: Pyrometallurgical reduction requires high temperatures (>1400℃) to destroy the spinel structure, but this easily leads to the reduction of vanadium oxides to elemental form, reducing vanadium recovery rate;

[0004] Low leaching efficiency: Wet acid leaching requires strong acids (such as concentrated sulfuric acid) and high temperatures (>90℃), and vanadium is in a low valence state ( The presence of this component necessitates an additional oxidation step, resulting in a lengthy and costly process.

[0005] Resource waste: Iron (TFe content of about 20%-40%) in the tailings is not effectively recovered, and the leaching residue contains harmful elements such as sodium and chromium, which are difficult to utilize directly.

[0006] The existing technology, Chinese patent number CN202310379867.1, has improved the vanadium recovery rate through acid leaching-reduction-oxidation process or flotation-acid leaching combination process, but still has problems such as complex process, high energy consumption and underutilization of iron resources. Therefore, developing a low-cost, high-efficiency, and environmentally friendly process for iron removal and vanadium enrichment from vanadium extraction tailings has significant economic and environmental value. Summary of the Invention

[0007] To address the problems in the prior art, this invention provides a method for iron removal and vanadium enrichment from vanadium extraction tailings and a spiral separation device.

[0008] The technical solution adopted by the present invention to solve its technical problem is: a spiral separation device, including a spiral separation structure and a support and protection structure, wherein the support and protection structure is connected to the side end of the spiral separation structure;

[0009] The spiral separation structure is used for separation work and can be angled on the support and protection structure. The motor drives the spiral rod seat to rotate through the reducer to carry out the separation operation. The lower end of the support trough frame is limited and fixed by the first limit mechanism and the second limit mechanism, so as to facilitate the replacement of the separation seat and the separation guide trough frame.

[0010] The support and protection structure is used to adjust the position of the spiral separation structure. The electrically controlled telescopic rod extends and retracts, causing the spiral separation structure to rotate on the hinged mating seat, while the driven telescopic rod provides support and protection on the other side.

[0011] Specifically, the spiral separation structure includes a fixed plate with a first guide groove and a second guide groove. A separation component is fixedly connected to the fixed plate. A spiral rod seat is rotatably provided at the center of the separation component, and the spiral rod seat is connected to a reducer and a motor. The motor and reducer are fixedly installed on a support frame.

[0012] Specifically, the support frame is fixedly connected to a mating hinge shaft at its center, the separation component is fixedly connected to a docking shaft at its side end, a connecting seat is fixedly connected to the docking shaft, the separation component is fixedly connected to a top shell at its upper end, a guide seat is fixedly connected to the side end of the top shell, and the guide seat is connected and fixedly connected to the bottom of the screw rod seat.

[0013] Specifically, the separation component includes a support tray, a buffer damping frame elastically buffered at the side end of the support tray, a lower end of the buffer damping frame fixedly connected to the support base, and the lower ends of the support tray are fixed to the first limiting mechanism and the second limiting mechanism respectively. The separation seat is snapped into the first limiting mechanism and the second limiting mechanism through a snap-fit ​​fixing frame, thereby installing the separation seat at the lower center of the support tray, and the separation seat is provided with a separation guide tray.

[0014] Specifically, the second limiting mechanism includes a top plate frame, the lower end of which is fixedly connected to a nested support frame, and a locking unit is fixedly installed on the nested support frame.

[0015] Specifically, the locking unit includes a horizontal guide rod, with a lifting handle fixedly connected to the lower end of the horizontal guide rod. A support base is fixedly connected to the horizontal guide rod, and the upper end of the support base is slidably connected to the telescopic guide frame via a spring rod. The telescopic guide frame slides and adjusts on the fixed guide block, and the fixed guide block is fixedly connected to the nested support frame. The telescopic guide frame and the nested support frame are connected through each other.

[0016] Specifically, the support and protection structure includes a second mounting plate, a first mounting plate is fixedly connected to the side end of the second mounting plate, a hinged mating seat is fixedly connected to the side end of the first mounting plate, a support base plate is fixedly connected to the lower end of the hinged mating seat, and an electrically controlled telescopic rod is hinged on the first mounting plate. The side end of the electrically controlled telescopic rod is hinged to the mating hinge shaft via a connecting hinge shaft.

[0017] Specifically, a connecting shaft is fixedly provided on the second mounting plate, and a driven telescopic rod is hinged on the connecting shaft. The side end of the driven telescopic rod is hinged to the bottom of the support frame.

[0018] Specifically, the support base plate is provided with pads to support the bottom of the fixing plate, the docking shaft is hinged to the hinge mating seat through the connecting seat, the telescopic guide is connected to the fixing frame to position the separation seat, and the top shell is fixedly connected to the upper end of the support slot frame.

[0019] A method for iron removal and vanadium enrichment from vanadium extraction tailings includes the following steps:

[0020] S1. First, the vanadium extraction tailings are crushed to a particle size of less than 0.074 mm and separated using a spiral separator. The tailings are then mixed with a composite reducing agent at a mass ratio of vanadium extraction tailings: reducing agent: calcium-based additive = 100:15-25:5-10. The composite reducing agent is a mixture of coke and anthracite with a fixed carbon content of 80%, and the calcium-based additive is calcium carbonate or calcium oxide.

[0021] S2. Next, the mixture is placed in a reducing gas and calcined at 1100-1250℃ for 30-60 minutes, wherein the reducing gas is CO. A mixture of gases, with CO and... The volume ratio is 1:2-5, which reduces the iron oxide in the vanadium extraction tailings to metallic iron. At the same time, the calcium-based additive reacts with silicates to generate low-melting-point calcium silicates, which promotes the aggregation and growth of iron particles and achieves the initial separation of iron and vanadate.

[0022] S3. Subsequently, the reduction roasting product is cooled and crushed to a particle size of less than 0.15 mm, then subjected to wet magnetic separation to obtain metallic iron powder and vanadium-enriched slag. The total iron content in the metallic iron powder is greater than 90%, and the vanadium-enriched slag contains... Content greater than 3%;

[0023] S4. Subsequently, the vanadium enrichment slag is added to a dilute sulfuric acid solution with a pH of 2-4 at a liquid-to-solid ratio (L / S) of 3-5:1. The solution is stirred and leached at 60-80℃ for 1-2 hours. After filtration, an iron-containing leachate and a low-iron vanadium slag are obtained. The iron concentration in the iron-containing leachate is greater than 50 g / L, and the iron content in the low-iron vanadium slag is less than 1%.

[0024] S5. Next, the iron-containing leachate is passed into an electrolytic cell, using an inert electrode as the anode and a stainless steel plate as the cathode. Electrolysis is carried out under conditions of a current density of 50-100 A / m² and a cell voltage of 2.5-3.5 V. The anode region... Oxidized to Metallic iron powder is precipitated in the cathode region, and the purity of the metallic iron powder precipitated in the cathode is greater than 95%.

[0025] S6. Finally, the low-iron vanadium slag and sodium salt are mixed at a mass ratio of 100:10-20 and calcined at 700-850℃ for 1-2 hours to convert vanadium into water-soluble sodium vanadate. The calcined product is then leached in water at a liquid-to-solid ratio of 5-10:1, a temperature of 80-95℃, and a time of 30-60 minutes to obtain a vanadium-containing solution and tailings. The vanadium-containing solution is purified by solvent extraction or ion exchange to obtain high-purity sodium vanadate. The purity is greater than 99%.

[0026] The beneficial effects of this invention are:

[0027] First, this invention controls the rotation of the spiral rod seat via a motor and a reducer, thereby guiding the material to be transported. The material is transported on the support trough, and the fine material is guided by the separation guide frame. The separation seat can be fixed to the first and second limiting mechanisms by the snap-fit ​​fixing frame, which facilitates subsequent replacement. Pulling the handle causes the horizontal guide rod to drive the spring rod and the supporting base to move, changing the position of the telescopic guide frame. This allows the telescopic guide frame to connect with the snap-fit ​​fixing frame and the nested support frame for limiting. At the same time, the electrically controlled telescopic rod extends and retracts, causing the spiral separation structure to rotate around the docking shaft and the connecting seat, changing the inclination. The driven telescopic rod provides bottom support, which facilitates the improvement of the stability of the spiral separation structure adjustment.

[0028] Second, the method in this invention has the following advantages: High-efficiency separation: Through the coupling of low-temperature reduction pretreatment and selective leaching, high-efficiency separation of iron and vanadium is achieved, with iron recovery rate >90% and vanadium recovery rate >85%; Resource utilization: Metallic iron powder can be directly returned to the furnace for steelmaking, and the purity of vanadium products reaches over 99%, meeting the needs of high-end applications; Environmentally friendly: The process flow is short, requiring no strong acid or high-temperature and high-pressure conditions, reducing waste gas and wastewater emissions, and meeting the requirements of green metallurgy; Economically feasible: It has strong raw material adaptability, can process vanadium extraction tailings of different compositions, and has low equipment investment and operating costs, resulting in significant economic benefits. Attached Figure Description

[0029] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0030] Figure 1 This is a three-dimensional structural diagram of the main body from a frontal perspective in this invention;

[0031] Figure 2 This is a side view three-dimensional structural diagram of the main body in this invention;

[0032] Figure 3 This is a three-dimensional exploded view of the main body of the present invention;

[0033] Figure 4 This is a frontal perspective three-dimensional structural diagram of the spiral separation structure in this invention;

[0034] Figure 5 This is a split view of the spiral separation structure in this invention;

[0035] Figure 6 This is a frontal perspective three-dimensional structural diagram of the separating component in this invention;

[0036] Figure 7 This is a three-dimensional split view of the detachable components in this invention;

[0037] Figure 8 This is a perspective view of the second limiting mechanism in this invention;

[0038] Figure 9 This is a split view of the locking unit in this invention;

[0039] Figure 10 This is a perspective view of the supporting and protective structure in this invention.

[0040] In the diagram: 1-Spiral separation structure, 2-Support and protection structure, 3-Top shell, 4-Guide seat, 5-Dating shaft, 6-Connecting seat, 7-First guide groove, 8-Fixing plate, 9-Separation component, 10-Spiral rod seat, 11-Second guide groove, 12-Motor, 13-Matching hinge shaft, 14-Support bracket, 15-Reducer, 16-Loading groove bracket, 17-Support base, 18-Buffer damping bracket, 19-Separation seat, 20-Separation guide groove bracket, 21-Snap-fit ​​fixing bracket, 22 23-First limiting mechanism, 24-Second limiting mechanism, 25-Top plate frame, 26-Nested support frame, 27-Locking unit, 28-Telescopic guide frame, 29-Fixed guide block, 20-Spring rod, 31-Supporting base bracket, 32-Lifting handle, 33-Horizontal guide rod, 34-Supporting base plate, 35-Hinged mating seat, 36-First mounting plate, 37-Electrically controlled telescopic rod, 38-Connecting hinge shaft, 39-Driven telescopic rod, 40-Second mounting plate. Detailed Implementation

[0041] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0042] The invention will be further described below with reference to the accompanying drawings.

[0043] Example

[0044] like Figure 1-10As shown, a spiral separation device of the present invention includes a spiral separation structure 1 and a support and protection structure 2, wherein the spiral separation structure 1 is connected to the side end of the support and protection structure 2.

[0045] The spiral separation structure 1 is used for separation work and can be angled on the support and protection structure 2. The motor 12 drives the spiral rod seat 10 to rotate through the reducer 15 to perform separation work. The lower end of the support slot frame 16 is limited and fixed by the first limiting mechanism 22 and the second limiting mechanism 23, thereby facilitating the replacement of the separation seat 19 and the separation guide slot frame 20.

[0046] The support and protection structure 2 is used to adjust the position of the spiral separating structure 1. The electrically controlled telescopic rod 36 extends and retracts, causing the spiral separating structure 1 to rotate on the hinged mating seat 34. At the same time, the driven telescopic rod 38 provides support and protection on the other side. The spiral rod seat 10 is rotated by the motor 12 and the reducer 15, thereby guiding the material to be transported. The material is transported on the support trough frame 16. At this time, the fine material is guided and transported by the separating guide trough frame 20. The separating seat 19 can be fixed to the first limit mechanism 22 and the second limit mechanism by the snap-fit ​​fixing frame 21. On mechanism 23, and to facilitate subsequent replacement work, lifting the handle 31 causes the horizontal guide rod 32 to drive the spring rod 29 and the support base 30 to move, changing the position of the telescopic guide 27, so that the telescopic guide 27 connects with the snap-fit ​​fixing frame 21 and the nested support frame 25 to perform limit work. At the same time, the electrically controlled telescopic rod 36, through extension and retraction, drives the spiral separation structure 1 to rotate around the docking shaft 5 and the connecting seat 6, changing the inclination. Meanwhile, the driven telescopic rod 38 provides bottom support, which facilitates the improvement of the stability of the adjustment of the spiral separation structure 1.

[0047] The spiral separation structure 1 includes a fixed plate 8, on which a first guide groove 7 and a second guide groove 11 are provided. A separation component 9 is fixedly connected to the fixed plate 8. A spiral rod seat 10 is rotatably provided at the center of the separation component 9, and the spiral rod seat 10 is connected to a reducer 15 and a motor 12. The motor 12 and the reducer 15 are fixedly installed on the support frame 14.

[0048] The center of the support frame 14 is fixedly connected to the mating hinge shaft 13, the side end of the separating component 9 is fixedly connected to the docking shaft 5, the docking shaft 5 is fixedly connected to the connecting seat 6, the upper end of the separating component 9 is fixedly connected to the top shell 3, the side end of the top shell 3 is fixedly connected to the guide seat 4, and the guide seat 4 is connected and fixedly connected to the bottom of the screw rod seat 10.

[0049] The separation component 9 includes a support tray 16, and a buffer damping frame 18 is provided on the side end of the support tray 16 for elastic buffering. The lower end of the buffer damping frame 18 is fixedly connected to the support base 17. The two sides of the lower end of the support tray 16 are respectively fixed to the first limiting mechanism 22 and the second limiting mechanism 23. The separation seat 19 is snapped with the first limiting mechanism 22 and the second limiting mechanism 23 through the snap-fit ​​fixing frame 21, thereby installing the separation seat 19 at the lower center of the support tray 16. The separation seat 19 is provided with a separation guide tray 20.

[0050] The second limiting mechanism 23 includes a top plate frame 24, the lower end of which is fixedly connected to a nested support frame 25, and a locking unit 26 is fixedly installed on the nested support frame 25.

[0051] The locking unit 26 includes a horizontal guide rod 32, with a lifting handle 31 fixedly connected to the lower end of the horizontal guide rod 32. A support base bracket 30 is fixedly connected to the horizontal guide rod 32. The upper end of the support base bracket 30 is slidably connected to a telescopic guide frame 27 via a spring rod 29. The telescopic guide frame 27 slides and adjusts on a fixed guide block 28. The fixed guide block 28 is fixedly connected to a nested support frame 25, and the telescopic guide frame 27 and the nested support frame 25 are connected through each other. The material to be separated can be introduced through the guide seat 4. The top shell 3 The top of the auger seat 10 is covered, at which point the motor 12 can drive it, and the reducer 15 controls the rotation of the auger seat 10, thereby guiding the material to be transported. The material is transported within the support trough 16, which is supported by the support base 17 and the buffer damping frame 18. The separation seat 19, separation guide frame 20, and snap-fit ​​fixing frame 21 are fixed within the support trough 16 by the first limiting mechanism 22 and the second limiting mechanism 23. The separation seat 19, separation guide frame 20, and snap-fit ​​fixing frame 21 are fixed with the first limiting mechanism 22 and the second limiting mechanism 23 by a locking method, which facilitates the replacement of the separation seat 19, separation guide frame 20, and snap-fit ​​fixing frame 21 later. The material can fall through the separation guide frame 20 and then be transported through the first guide trough 7. Coarse material is guided out through the second guide trough 11. When it is necessary to replace the separation seat 19, separation guide frame 20, and snap-fit ​​fixing frame 21... At this time, pulling the handle 31 will move the horizontal guide rod 32. The horizontal guide rod 32 can pull the support base bracket 30 and the spring rod 29 to move, so that the spring rod 29 drives the telescopic guide frame 27 to slide on the fixed guide block 28. Then, the snap-fit ​​fixing bracket 21 is inserted between the top plate bracket 24 and the nested support bracket 25. After that, the handle 31 is released, the telescopic guide frame 27 is reset, and the separation seat 19, the separation guide groove bracket 20 and the snap-fit ​​fixing bracket 21 are positioned and fixed, thus completing the replacement work.

[0052] The supporting and protective structure 2 includes a second mounting plate 40. A first mounting plate 35 is fixedly connected to the side end of the second mounting plate 40. A hinged mating seat 34 is fixedly connected to the side end of the first mounting plate 35. A supporting base plate 33 is fixedly connected to the lower end of the hinged mating seat 34. An electrically controlled telescopic rod 36 is hinged on the first mounting plate 35. The side end of the electrically controlled telescopic rod 36 is hinged to the mating hinge shaft 13 via a connecting hinge shaft 37. When the electrically controlled telescopic rod 36 operates, it extends and retracts, driving the docking shaft 5 and the connecting seat 6 within the spiral separation structure 1 to move. At this time, the connecting seat 6 is located at the hinged mating seat 34. When the spiral structure 1 rotates upwards, the electrically controlled telescopic rod 36 is connected to the mating hinge shaft 13 via the connecting hinge shaft 37, thereby controlling the tilt adjustment of the spiral separation structure 1. At this time, the driven telescopic rod 38 connected to the lower end of the support frame 14 also performs telescopic adjustment, thereby providing support and protection for the other side of the spiral separation structure 1. The driven telescopic rod 38 is connected to the second mounting plate 40 via the connecting mating shaft 39. The driven telescopic rod 38 can change its angle on the connecting mating shaft 39, thereby preventing jamming and improving the stability of the spiral separation structure 1 adjustment, thus changing the tilt and performing better separation processing.

[0053] A connecting shaft 39 is fixedly provided on the second mounting plate 40. A driven telescopic rod 38 is hinged on the connecting shaft 39. The side end of the driven telescopic rod 38 is hinged to the bottom of the support frame 14.

[0054] A pad is provided on the support base plate 33 to support the bottom of the fixing plate 8. The docking shaft 5 is hinged to the hinge mating seat 34 through the connecting seat 6. The telescopic guide 27 passes through and is snapped into the fixing frame 21 to position the separation seat 19. The top shell 3 is fixedly connected to the upper end of the support slot frame 16.

[0055] A method for iron removal and vanadium enrichment from vanadium extraction tailings includes the following steps:

[0056] S1. First, the vanadium extraction tailings are crushed to a particle size of less than 0.074mm and separated using a spiral separator. The tailings are then mixed with a composite reducing agent at a mass ratio of vanadium extraction tailings: reducing agent: calcium-based additive = 100:15-25:5-10. The composite reducing agent is a mixture of coke and anthracite with a fixed carbon content of 80%, and the calcium-based additive is calcium carbonate or calcium oxide.

[0057] S2. Next, place the mixture in a reducing gas and calcine it at 1100-1250℃ for 30-60 minutes. The reducing gas is CO. A mixture of gases, with CO and... The volume ratio is 1:2-5, which reduces the iron oxide in the vanadium extraction tailings to metallic iron. At the same time, the calcium-based additive reacts with silicates to generate low-melting-point calcium silicates, which promotes the aggregation and growth of iron particles and achieves the initial separation of iron and vanadate.

[0058] S3. Afterwards, the reduction roasting product is cooled and crushed to a particle size of less than 0.15 mm, then subjected to wet magnetic separation to obtain metallic iron powder and vanadium-enriched slag. The total iron content in the metallic iron powder is greater than 90%, and the vanadium-enriched slag contains... Content greater than 3%;

[0059] S4. Next, the vanadium enrichment slag is added to a dilute sulfuric acid solution with a pH of 2-4 at a liquid-to-solid ratio of 3-5:1 (L / S). The solution is stirred and leached at 60-80℃ for 1-2 hours. After filtration, an iron-containing leachate and a low-iron vanadium slag are obtained. The iron concentration in the iron-containing leachate is greater than 50 g / L, and the iron content in the low-iron vanadium slag is less than 1%.

[0060] S5. Next, the iron-containing leachate is passed into an electrolytic cell, using an inert electrode as the anode and a stainless steel plate as the cathode. Electrolysis is carried out under conditions of a current density of 50-100 A / m² and a cell voltage of 2.5-3.5 V. The anode region... Oxidized to Metallic iron powder is precipitated in the cathode region, and the purity of the precipitated metallic iron powder is greater than 95%.

[0061] S6. Finally, the low-iron vanadium slag and sodium salt are mixed at a mass ratio of 100:10-20 and calcined at 700-850℃ for 1-2 hours to convert vanadium into water-soluble sodium vanadate. The calcined product is then leached in water at a liquid-to-solid ratio of 5-10:1, a temperature of 80-95℃, and a time of 30-60 minutes to obtain a vanadium-containing solution and tailings. The vanadium-containing solution is purified by solvent extraction or ion exchange to obtain high-purity sodium vanadate. The purity is greater than 99%.

[0062] The working principle is as follows: During use, the user can guide the material to be separated through the guide seat 4. The top shell 3 covers the top of the screw rod seat 10. At this time, the motor 12 can drive the screw rod seat 10 to rotate through the reducer 15, thereby guiding the material to be transported. The material is transported in the support trough 16. The support trough 16 is supported by the support base 17 and the buffer damping frame 18. The separation seat 19, the separation guide trough 20, and the snap-fit ​​fixing frame 21 are fixed in the support trough 16 by the first limiting mechanism 22 and the second limiting mechanism 23. The separation seat 19, the separation guide trough 20, and the snap-fit ​​fixing frame 21 are fixed with the first limiting mechanism 22 and the second limiting mechanism 23 by locking, which facilitates the subsequent adjustment of the separation seat 19. 9. Replacement of the separating guide frame 20 and the snap-fit ​​fixing frame 21: The material can fall through the separating guide frame 20 and then be transported through the first guide 7. The coarse material is guided out through the second guide 11. When it is necessary to replace the separating seat 19, the separating guide frame 20, and the snap-fit ​​fixing frame 21, pull the lifting handle 31 to drive the horizontal guide rod 32 to move. The horizontal guide rod 32 can pull the support base bracket 30 and the spring rod 29 to move, so that the spring rod 29 drives the telescopic guide frame 27 to slide on the fixed guide block 28. At this time, insert the snap-fit ​​fixing frame 21 between the top plate frame 24 and the nested support frame 25. Then release the lifting handle 31, and the telescopic guide frame 27 will reset, and the separating seat 19, the separating guide frame 20, and the snap-fit ​​fixing frame 21 will be positioned and fixed, thus completing the replacement work.

[0063] When angle adjustment is required, the electrically controlled telescopic rod 36 operates. The telescopic rod 36 extends and retracts, causing the docking shaft 5 and connecting seat 6 within the spiral separation structure 1 to move. The connecting seat 6 rotates on the hinged mating seat 34. The electrically controlled telescopic rod 36 connects to the mating hinge shaft 13 via the connecting hinge shaft 37, thereby controlling the tilt adjustment of the spiral separation structure 1. Simultaneously, the driven telescopic rod 38, connected to the lower end of the support frame 14, also extends and retracts, providing support and protection for the other side of the spiral separation structure 1. The driven telescopic rod 38 connects to the second mounting plate 40 via the connecting mating shaft 39. The driven telescopic rod 38 can change angle on the connecting mating shaft 39, preventing jamming and improving the stability of the spiral separation structure 1 adjustment, thus changing the tilt and performing better separation processing.

[0064] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A screw separation apparatus, characterized by: Including screw separation structure (1) and support protection structure (2), screw separation structure (1) side end is connected with support protection structure (2); Screw separation structure (1) is used for separating work, and can be angle adjusted on support protection structure (2), motor (12) drives screw rod base (10) to rotate through speed reducer (15), and separation work is carried out, and the lower end of carrier groove frame (16) is limited and fixed through first limiting mechanism (22), second limiting mechanism (23) to separate seat (19), clamping fixing frame (21), so that the replacement of separate seat (19) and separation guide groove frame (20) is facilitated; Support protection structure (2) is used for adjusting the position of screw separation structure (1), and electric control telescopic rod (36) is telescoped, so that screw separation structure (1) rotates on hinged cooperation seat (34), and driven telescopic rod (38) supports the other side.

2. A screw separator according to claim 1, characterized in that The screw separation structure (1) comprises a fixed plate (8), a first guide groove (7) and a second guide groove (11) are formed in the fixed plate (8), a separation component (9) is fixedly connected to the fixed plate (8), a screw rod base (10) is rotatably arranged at the center of the separation component (9), and the screw rod base (10) is connected with a speed reducer (15) and a motor (12), and the motor (12) and the speed reducer (15) are fixedly installed on a supporting frame (14).

3. A screw separator according to claim 2, characterized in that: The center of the supporting frame (14) is fixedly connected with a matched hinge shaft (13), the side end of the separation component (9) is fixedly connected with a butt joint shaft (5), the butt joint shaft (5) is fixedly connected with a connecting seat (6), the upper end of the separation component (9) is fixedly connected with a top shell (3), the side end of the top shell (3) is fixedly connected with a material guide seat (4), and the material guide seat (4) is fixedly connected with the bottom of the screw rod base (10).

4. A screw separator according to claim 3, characterised in that: The separation component (9) comprises a carrier groove frame (16), the side end of the carrier groove frame (16) is elastically buffered with a buffer damping frame (18), the lower end of the buffer damping frame (18) is fixedly connected with a support base (17), the lower ends of the carrier groove frame (16) are fixed with a first limiting mechanism (22) and a second limiting mechanism (23) on both sides, a separate seat (19) is clamped with the first limiting mechanism (22) and the second limiting mechanism (23) through a clamping fixing frame (21), so that the separate seat (19) is installed at the center of the lower end of the carrier groove frame (16), and the separate seat (19) is provided with a separation guide groove frame (20).

5. A screw separator according to claim 4, characterised in that: The second limiting mechanism (23) comprises a top plate frame (24), the lower end of the top plate frame (24) is fixedly connected with a nested support frame (25), and the nested support frame (25) is fixedly installed with a locking unit (26).

6. A screw separator according to claim 5, characterized in that: The locking unit (26) comprises a horizontal guide rod (32), the lower end of the horizontal guide rod (32) is fixedly connected with a pull handle (31), the horizontal guide rod (32) is fixedly connected with a supporting bottom bracket (30), the upper end of the supporting bottom bracket (30) is slidingly connected with a telescopic guide frame (27) driven by a spring rod (29), the telescopic guide frame (27) is slidingly adjusted on a fixed guide block (28), the fixed guide block (28) is fixedly connected with a nested support frame (25), and the telescopic guide frame (27) is penetratingly arranged in the nested support frame (25).

7. A screw separator according to claim 6, characterized in that: The supporting protection structure (2) comprises a second mounting support plate (40), the side end of the second mounting support plate (40) is fixedly connected with a first mounting support plate (35), the side end of the first mounting support plate (35) is fixedly connected with a hinged matching seat (34), the lower end of the hinged matching seat (34) is fixedly connected with a supporting bottom plate (33), a electric control telescopic rod (36) is hingedly arranged on the first mounting support plate (35), and the side end of the electric control telescopic rod (36) is hingedly arranged with the matching hinge shaft (13) through a connecting hinge shaft (37).

8. A screw separator according to claim 7, characterised in that: A connecting matching shaft (39) is fixedly arranged on the second mounting support plate (40), a driven telescopic rod (38) is hingedly arranged on the connecting matching shaft (39), and the side end of the driven telescopic rod (38) is hingedly arranged with the supporting frame (14) bottom.

9. A screw separator according to claim 8, characterized in that: The supporting bottom plate (33) is provided with a cushion block for supporting the bottom of the fixed plate (8), the butt joint shaft (5) is hingedly arranged with the hinged matching seat (34) through a connecting seat (6), the telescopic guide frame (27) is penetratingly clamped with a fixed frame (21) for positioning the separating seat (19), and the top shell (3) is fixedly connected with the supporting groove frame (16) upper end.

10. A method for removing iron from vanadium extraction tailings to enrich vanadium, using a spiral separation device according to claim 9, characterized in that, The method comprises the following steps: S1, first, the vanadium tailings are crushed to a particle size of less than 0.074 mm, and are separated by a spiral separation device, and are mixed uniformly with a composite reducing agent at a mass ratio of vanadium tailings: reducing agent: calcium-based additive = 100: 15-25: 5-10, wherein the composite reducing agent is a mixture of coke and anthracite, and the fixed carbon content is 80%, and the calcium-based additive is calcium carbonate or calcium oxide; S2, then, the mixture is placed in the reducing gas, 1100-1250 ℃ calcination for 30-60 min, the reducing gas is CO, mixed gas, and the volume ratio of CO to 1:2-5, so that the iron oxide in the vanadium tailings is reduced to metallic iron, and the calcium-based additive reacts with silicate to form low-melting calcium silicate, promoting the growth of iron particles, realizing the preliminary separation of iron and vanadate. S3. Subsequently, the reduction roasting product is cooled and crushed to a particle size of less than 0.15 mm, then subjected to wet magnetic separation to obtain metallic iron powder and vanadium-enriched slag. The total iron content in the metallic iron powder is greater than 90%, and the vanadium-enriched slag contains... Content greater than 3%; S4, then, the vanadium-rich slag is added into a dilute sulfuric acid solution with a pH value of 2-4 at a liquid-solid ratio (L / S) of 3-5:1, and is stirred and leached at 60-80°C for 1-2h, and after filtration, an iron-containing leaching solution and a low-iron vanadium slag are obtained, the iron concentration in the iron-containing leaching solution is greater than 50g / L, and the iron content in the low-iron vanadium slag is less than 1%; S5. Next, the iron-containing leachate is passed into an electrolytic cell, using an inert electrode as the anode and a stainless steel plate as the cathode. Electrolysis is carried out under conditions of a current density of 50-100 A / m² and a cell voltage of 2.5-3.5 V. The anode region... Oxidized to Metallic iron powder is precipitated in the cathode region, and the purity of the metallic iron powder precipitated in the cathode is greater than 95%. S6. Finally, the low-iron vanadium slag and sodium salt are mixed at a mass ratio of 100:10-20 and calcined at 700-850℃ for 1-2 hours to convert vanadium into water-soluble sodium vanadate. The calcined product is then leached in water at a liquid-to-solid ratio of 5-10:1, a temperature of 80-95℃, and a time of 30-60 minutes to obtain a vanadium-containing solution and tailings. The vanadium-containing solution is purified by solvent extraction or ion exchange to obtain high-purity sodium vanadate. The purity is greater than 99%.

Images