Device and method for reducing and recycling industrial barium slag by utilizing reselection technology

Abstract

The invention discloses a device and a method for reducing and recycling industrial barium slag by using a reselection technology, and relates to the technical field of comprehensive utilization of solid waste resources, the device comprises a bottom plate, the top of the bottom plate is provided with a jaw type crushing assembly, and the jaw type crushing assembly is used for primarily crushing the barium slag; when the device is used, a mechanical device is used for grinding or crushing the barium slag, the delivery form of the barium slag is reduced, the newly generated barium slag is separated through a 1.18 mm sieve, the barium slag with the particle size smaller than 1.18 mm is obtained, the barium slag is divided into a group with the particle size smaller than 0.5 mm, a group with the particle size larger than 0.5 mm and a group with the particle size smaller than 1.18 mm through a bushing sieve, and four groups with the particle size larger than 0.5 mm and the particle size smaller than 0.5 mm are ground into four groups with the particle size smaller than 0.5 mm to be subjected to jigging shaking table tests respectively. And concentrate with the highest barium sulfate content of 80 + / -3% can be obtained, and mineral separation and recycling of the barium slag are achieved.

Description

Technical Field

[0001] The invention relates to the technical field of comprehensive utilization of solid waste resources, and specifically to a device and a method for reducing and recycling industrial barium slag by using gravity separation technology. Background Art

[0002] In industry, barium carbonate can be obtained through three processes: carbonate and barium sulfide co-dissolution double decomposition method, witherite conversion method and barite carbonization reduction method. More than 80% of barium carbonate is produced by barite carbonization reduction method, which uses barite and coal as raw materials and uses carbonization reduction method. Barium slag is the solid waste produced by this method. The pollution coefficient of barium slag in the carbonization reduction process is about 0.8, that is, 0.8-1t of barium slag is produced for every 1t of barium salt produced.

[0003] At present, the annual discharge of barium slag in my country exceeds 1 million tons, and the total accumulated stockpile has exceeded 10 million tons. The soluble barium ions in the barium slag are toxic and strongly corrosive, with a leaching rate of up to 92.8%. The lethal dose of barium ion solution is 0.8-0.9g, posing a potential toxic risk to plants and animals. The long-term stacking of barium slag will occupy a large amount of farmland and land. When the temperature is high, the barium slag will undergo a spontaneous combustion reaction to release SO2 gas; due to rainwater infiltration, the barium slag will flow out a large amount of yellow sulfide-containing leachate, which can be transferred into surface water and groundwater, and release H2S gas, which is toxic to soil and groundwater. At the same time, the Ba in the leachate 2+ It has a cumulative effect, enters the human body through the food chain, and causes irreversible damage to the natural environment and human life; in addition, the alkaline components and BaS present in barium slag will also cause soil salinization.

[0004] Therefore, we proposed a device and method for reducing and recycling industrial barium slag using gravity separation technology. While recycling the barium slag, we can solve the environmental pollution problem that may be caused by the storage of barium slag and achieve green development. Summary of the invention

[0005] The purpose of the present invention is to provide a device and method for reducing and recycling industrial barium slag using gravity separation technology, so as to solve the problem of environmental pollution caused by the storage of barium slag mentioned in the above background technology.

[0006] To achieve the above-mentioned purpose, the first aspect of the present invention provides a technical solution: a device for reducing and recycling industrial barium slag by using gravity separation technology, comprising a bottom plate, a jaw crushing assembly is arranged on the top of the bottom plate, the jaw crushing assembly is used for primary crushing of the barium slag, a double-shaft crushing assembly is arranged at the bottom of the jaw crushing assembly, a material guide assembly is arranged at the bottom of the double-shaft crushing assembly, a screening assembly is arranged at the bottom of the material guide assembly, the double-shaft crushing assembly is used for secondary crushing of the barium slag, the material guide assembly is used for conveying the crushed barium slag to the screening assembly, and the screening assembly is used for double screening of the barium slag;

[0007] The jaw crushing assembly comprises a crushing box, a power mechanism is arranged on the top of the crushing box, a movable jaw assembly is arranged inside the crushing box, a movable jaw plate is arranged on the outer surface of the movable jaw assembly, and a static jaw plate is arranged on one side inside the crushing box;

[0008] The double-axis crushing assembly includes a crushing box, the top of which is fixedly connected to a feed pipe, the top of which is fixedly connected to the bottom of the crushing box, a driving motor is installed on the front surface of the crushing box through an auxiliary plate, and two crushing rollers are movably embedded in the interior of the crushing box, and the outer surfaces of the two crushing rollers are meshed with each other.

[0009] Preferably, the two ends of the two crushing rollers are movable and penetrate the front surface and the rear surface of the crushing box respectively, and gears are fixedly installed on the outer surfaces of the two crushing rollers near one end, the outer surfaces of the two gears are meshed, and the output end of the drive motor is fixedly connected to one end of one of the crushing rollers.

[0010] Preferably, the screening assembly includes a screening box, a discharge hopper is fixedly connected to the bottom of the screening box, a fixed plate is fixedly installed on the outer surface of one side of the screening box, two movable holes are opened on the outer surface of one side of the screening box, and two vibration holes are opened on the outer surface of the other side of the screening box, a vibration plate is movably embedded in the two movable holes, a vibration motor is arranged inside the vibration plate, and a first screen is fixedly installed on the outer surface of one side of the vibration plate near the top.

[0011] Preferably, a second screen is fixedly installed on the outer surface of one side of the vibration plate near the bottom, the outer surface of the first screen and the outer surface of the second screen are movably embedded in the interior of the screening box, and limiting rods are fixedly installed at the four corners inside the screening box, and the bottom ends of the four limiting rods respectively movably pass through the first screen and the second screen to the bottom, and the outer surfaces of the four limiting rods near the bottom are movably sleeved with a first spring.

[0012] Preferably, one end of the four first springs are respectively fixedly connected to the four corners of the inner bottom surface of the screening box, and the other ends of the four first springs are respectively fixedly connected to the four corners of the bottom of the second screen, and the outer surfaces of the four limit rods are movably sleeved with second springs, one end of the four second springs are respectively fixedly connected to the four corners of the bottom of the first screen, and the other ends of the four second springs are respectively fixedly connected to the four corners of the inner bottom surface of the second screen.

[0013] Preferably, conical protective covers are fixedly installed on the top of the first screen and the top of the second screen, and the outer surfaces of the two conical protective covers are in contact with the inner wall of the screening box; discharge plates are fixedly installed on the outer surface of one side of the first screen and the outer surface of one side of the second screen, and the outer surfaces of the two discharge plates are movably embedded in the inside of the two vibration holes, respectively; a plurality of supporting telescopic rods are fixedly installed on the bottom of the vibration plate, and the bottom ends of the plurality of supporting telescopic rods are fixedly installed on the bottom surface inside the fixed plate.

[0014] Preferably, the material guide assembly includes a material guide hopper, an inclined buffer plate is fixedly installed inside the material guide hopper, a plurality of reinforcing ribs are fixedly installed on the bottom of the inclined buffer plate, a forward and reverse motor is fixedly installed on the rear surface of the screening box through an auxiliary plate, a rotating rod is fixedly installed on the output end of the forward and reverse motor, a rotating block is fixedly installed on the outer surface of the rotating rod, a material guide plate is fixedly installed on the top of the rotating block, the outer surface of the material guide plate is movably embedded in the material guide hopper, one end of the rotating rod is movably inserted into the interior of the screening box, one end of the rotating rod is movably embedded in the front surface wall inside the screening box near the top, and the top of the material guide hopper is fixedly connected to the bottom of the crushing box.

[0015] Preferably, the bottom of the guide hopper is fixedly connected to the top of the screening box, the bottom ends of the plurality of reinforcing ribs are fixedly mounted on one side inside the guide hopper, an electric push rod is fixedly mounted on one side inside the fixed plate near the top, a push claw rake is fixedly mounted on the output end of the electric push rod, two support rods are fixedly mounted on the outer surface of one side of the push claw rake, one end of the two support rods are movably penetrated through the screening box to the outer surface of the fixed plate, the output end of the electric push rod is movably penetrated into the interior of the screening box, and the outer surface of the push claw rake is located inside one of the conical protective covers near the bottom.

[0016] Preferably, two support frames are fixedly installed on the top of the base plate near one side, and the tops of the two support frames are fixedly installed on the bottom of the crushing box. A control system is arranged on the top of the base plate, and the corner of the bottom of the screening box is fixedly installed on the top of the base plate near the other side through an auxiliary rod.

[0017] The second aspect of the present invention provides a technical solution: a method for reducing and recycling industrial barium slag using gravity separation technology, comprising the following steps:

[0018] The first step is to restore the barium slag to its factory state;

[0019] In the second step, the barium slag in the factory state of the reduced barium slag was screened and divided into two groups with a particle size of less than 0.5 mm and a particle size of greater than 0.5 mm and less than 1.18 mm, with a yield of 33% and 66% respectively, and a jigging shaker test was performed;

[0020] The third step is to grind the barium slag with a particle size greater than 0.5 mm after screening to less than 0.5 mm and then conduct a jigging shaker test, wherein the barium slag comprises: by weight, 30-35 parts of SiO2, 25-30 parts of BaO, 17-22 parts of SO3, 5-10 parts of Fe2O3, 3-4 parts of Na2O, 3-4 parts of Al2O3, and 0-1 parts of MgO; the barium slag with a particle size less than 0.5 mm comprises: by weight, 40-45 parts of BaO, 20-25 parts of SiO2, 15-20 parts of SO3, 5-10 parts of CaO, 5-10 parts of Fe2O3, and 3-4 parts of Al2O3, and the barium slag with a particle size greater than 0.5 mm and less than 1.18 mm comprises: by weight, 40-45 parts of BaO, 20-25 parts of SiO2, 15-20 parts of SO3, 5-10 parts of CaO, 5-10 parts of Fe2O3, and 3-4 parts of Al2O3, and the barium slag with a particle size greater than 0.5 mm is ground to less than 0.5 mm.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. When the present invention is used, a mechanical device is used to grind or crush the barium slag to restore the factory form of the barium slag, and the newly generated barium slag is separated through a 1.18 mm sieve to obtain barium slag with a particle size of less than 1.18 mm, which is further divided into two groups with a particle size of less than 0.5 mm and a particle size of greater than 0.5 mm and less than 1.18 mm by a set sieve. The particles greater than 0.5 mm are ground to a particle size of less than 0.5 mm, and a total of four groups are subjected to jig shaker tests respectively. A concentrate with a maximum barium sulfate content of 50±3% can be obtained, thereby realizing the beneficiation and recycling of the barium slag.

[0023] 2. When the present invention is used, the power mechanism is started through the control system to drive the movable jaw assembly to move, which drives the movable jaw plate to move and cooperate with the static jaw plate to perform primary crushing on the barium slag, and the barium slag is allowed to enter the crushing box through the feed pipe, and the drive motor is started to drive the two crushing rollers to rotate in opposite directions through two meshing gears to perform secondary crushing on the barium slag to improve the crushing effect, and the barium slag is transported to the screening box through the material guide component, and the vibration motor is started to drive the first screen and the second screen to vibrate simultaneously through the vibration plate, and the barium slag smaller than .mm falls down through the first screen to the second screen for secondary screening, and at the same time, the barium slag smaller than .mm falls into the discharge hopper through the mesh of the second screen, thereby discharging the barium slag of .mm, and the barium slag is doubly screened by the screening component to improve the screening effect.

[0024] 3. When the present invention is used, the speed at which the barium slag falls downward is reduced by tilting the buffer plate, and the barium slag is guided onto the material guide plate, and the forward and reverse motors are started to drive the rotating rod, the rotating block and the material guide plate to rotate, so that the material guide plate is in an inclined state, thereby facilitating the barium slag to slowly slide into the first screen, and avoiding the barium slag from concentrating on impacting a certain place of the first screen, causing damage to the first screen, and then the forward and reverse motors drive the material guide plate to rotate and reset, and then the electric push rod is started, and the pushing claw rake pushes the accumulated barium slag to other positions in the first screen, so that the barium slag is spread evenly inside the first screen, and screening is better performed, avoiding accumulation in a certain place and affecting the screening efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a front perspective view of a device for reducing and recycling industrial barium slag using gravity separation technology according to the present invention;

[0026] Figure 2 It is a rear perspective view of a device for reducing and recycling industrial barium slag using gravity separation technology according to the present invention;

[0027] Figure 3 It is a perspective view of the structure of the jaw crushing assembly in the device for reducing and recycling industrial barium slag by using gravity separation technology in the present invention;

[0028] Figure 4 It is a structural sectional expanded stereoscopic diagram of a crushing box in a device for reducing and recycling industrial barium slag using gravity separation technology according to the present invention;

[0029] Figure 5 It is a structural cross-sectional expanded stereoscopic diagram of a double-shaft crushing assembly in a device for reducing and recycling industrial barium slag using gravity separation technology according to the present invention;

[0030] Figure 6 It is a structural sectional expanded stereoscopic diagram of the material guide assembly in the device for reducing and recycling industrial barium slag by using gravity separation technology of the present invention;

[0031] Figure 7 It is a structural sectional expanded stereogram of a screening assembly in a device for reducing and recycling industrial barium slag using gravity separation technology according to the present invention;

[0032] Figure 8 It is a structural sectional expanded stereoscopic diagram of a screening box in a device for reducing and recycling industrial barium slag using gravity separation technology according to the present invention;

[0033] Fig. 9 This is a three-dimensional diagram of the structure of the first screen in the device for reducing and recycling industrial barium slag using gravity separation technology according to the present invention;

[0034] Fig.10 A three-dimensional diagram of a device for reducing and recycling industrial barium slag using gravity separation technology according to the present invention;

[0035] Fig.11 This is the mineral phase composition diagram of barium slag;

[0036] Fig.12 This is a physical picture of the shaking table test results of barium slag less than 0.5mm;

[0037] Fig.13 This is a physical picture of the shaking table test results less than 1.18mm;

[0038] Fig.14 This is a physical picture of the shaking table test results of barium slag larger than 0.5mm;

[0039] Fig.15 This is a physical picture of a planetary ball mill grinding barium slag with a particle size greater than 0.5 mm;

[0040] Fig.16 This is a physical picture of the shaking table test result of the barium slag being less than 0.5mm after grinding;

[0041] Fig.17 This is a magnified picture of the shaking table test result showing that the barium slag is less than 0.5mm after grinding.

[0042] In the figure:

[0043] 1. Bottom plate; 2. Support frame; 3. Control system; 4. Jaw crushing assembly; 401. Crushing box; 402. Power mechanism; 403. Moving jaw assembly; 404. Moving jaw plate; 405. Static jaw plate; 5. Double-axis crushing assembly; 501. Crushing box; 502. Feeding pipe; 503. Driving motor; 504. Gear; 505. Crushing roller; 6. Material guide assembly; 601. Material guide hopper; 602. Inclined buffer plate; 603. Reinforcement rib; 604. Forward and reverse motor; 605. Rotating rod; 606. Rotating block; 607, guide plate; 608, electric push rod; 609, push claw rake; 610, support rod; 7, screening assembly; 701, screening box; 702, discharge hopper; 703, fixed plate; 704, vibration plate; 705, supporting telescopic rod; 706, vibration motor; 707, first screen; 708, second screen; 709, conical protective cover; 710, discharge plate; 711, limit rod; 712, movable hole; 713, first spring; 714, second spring; 715, vibration hole. DETAILED DESCRIPTION

[0044] 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 implementation regulations described 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.

[0045] Example 1: Please refer to Figure 1-Figure 10The present invention provides a technical solution: a device for reducing and recycling industrial barium slag by using gravity separation technology, comprising a bottom plate 1, a jaw crushing assembly 4 is arranged on the top of the bottom plate 1, the jaw crushing assembly 4 is used for primary crushing of the barium slag, a double-shaft crushing assembly 5 is arranged at the bottom of the jaw crushing assembly 4, a material guide assembly 6 is arranged at the bottom of the double-shaft crushing assembly 5, a screening assembly 7 is arranged at the bottom of the material guide assembly 6, the double-shaft crushing assembly 5 is used for secondary crushing of the barium slag, the material guide assembly 6 is used for conveying the crushed barium slag to the screening assembly 7, and the screening assembly 7 is used for double screening of the barium slag; the jaw crushing assembly 4 comprises a crushing box 401, a power mechanism 402 is arranged on the top of the crushing box 401, a movable jaw assembly 403 is arranged inside the crushing box 401, and the movable jaw A movable jaw plate 404 is arranged on the outer surface of the assembly 403, and a static jaw plate 405 is arranged on one side inside the crushing box 401; the double-shaft crushing assembly 5 includes a crushing box 501, a feed pipe 502 is fixedly connected to the top of the crushing box 501, the top of the feed pipe 502 is fixedly connected to the bottom of the crushing box 401, a driving motor 503 is installed on the front surface of the crushing box 501 through an auxiliary plate, two crushing rollers 505 are movably embedded inside the crushing box 501, the outer surfaces of the two crushing rollers 505 are meshed, and the two ends of the two crushing rollers 505 are movably penetrated to the front surface and the rear surface of the crushing box 501, and the outer surfaces of the two crushing rollers 505 are fixedly installed with gears 504 near one end, and the outer surfaces of the two gears 504 are meshed, and the driving motor The output end of 503 is fixedly connected to one end of one of the crushing rollers 505, the screening assembly 7 includes a screening box 701, the bottom of the screening box 701 is fixedly connected to a discharge hopper 702, a fixed plate 703 is fixedly installed on the outer surface of one side of the screening box 701, two movable holes 712 are provided on the outer surface of one side of the screening box 701, and two vibration holes 715 are provided on the outer surface of the other side of the screening box 701. A vibration plate 704 is movably embedded in the two movable holes 712, and a vibration motor 706 is arranged inside the vibration plate 704. A first screen 707 is fixedly installed near the top of the outer surface of one side of the vibration plate 704, and a second screen 708 is fixedly installed near the bottom of the outer surface of one side of the vibration plate 704. The outer surface of the first screen 707 The outer surfaces of the first and second screens 707 and 708 are movably embedded in the interior of the screening box 701, and the limiting rods 711 are fixedly installed at the four corners inside the screening box 701. The bottom ends of the four limiting rods 711 are movably inserted through the first screen 707 and the second screen 708 to the bottom, and the outer surfaces of the four limiting rods 711 near the bottom ends are movably sleeved with first springs 713, one ends of the four first springs 713 are respectively fixedly connected to the four corners of the bottom surface of the inner part of the screening box 701, and the other ends of the four first springs 713 are respectively fixedly connected to the four corners of the bottom of the second screen 708, and the outer surfaces of the four limiting rods 711 are movably sleeved with second springs 714, and one ends of the four second springs 714 are respectively fixedly connected to the four corners of the bottom of the first screen 707.The other ends of the four second springs 714 are respectively fixedly connected to the four corners of the inner bottom surface of the second screen 708, and the top of the first screen 707 and the top of the second screen 708 are fixedly installed with a conical protective cover 709, and the outer surfaces of the two conical protective covers 709 are in contact with the inner wall of the screening box 701. The outer surface of one side of the first screen 707 and the outer surface of one side of the second screen 708 are fixedly installed with a discharge plate 710, and the outer surfaces of the two discharge plates 710 are respectively movably embedded in the inside of the two vibration holes 715. The bottom of the vibration plate 704 is fixedly installed with a plurality of supporting telescopic rods 705, and a plurality of supporting The bottom ends of the telescopic rods 705 are fixedly mounted on the bottom surface of the fixed plate 703. The material guide assembly 6 includes a material guide hopper 601. An inclined buffer plate 602 is fixedly mounted inside the material guide hopper 601. A plurality of reinforcing ribs 603 are fixedly mounted on the bottom of the inclined buffer plate 602. A forward and reverse motor 604 is fixedly mounted on the rear surface of the screening box 701 through an auxiliary plate. A rotating rod 605 is fixedly mounted on the output end of the forward and reverse motor 604. A rotating block 606 is fixedly mounted on the outer surface of the rotating rod 605. A material guide plate 607 is fixedly mounted on the top of the rotating block 606. The outer surface of the material guide plate 607 is movably embedded in the guide hopper 601. Inside, one end of the rotating rod 605 is movable and penetrates into the interior of the screening box 701, and one end of the rotating rod 605 is movably embedded in the front surface wall of the screening box 701 near the top. The top of the guide hopper 601 is fixedly connected to the bottom of the crushing box 501, and the bottom of the guide hopper 601 is fixedly connected to the top of the screening box 701. The bottom ends of multiple reinforcing ribs 603 are fixedly installed on one side of the guide hopper 601, and an electric push rod 608 is fixedly installed on one side of the interior of the fixed plate 703 near the top. A push claw rake 609 is fixedly installed on the output end of the electric push rod 608, and a push claw rake 609 is fixedly installed on the outer surface of one side of the push claw rake Two support rods 610 are installed, one end of the two support rods 610 is movable through the screening box 701 to the outer surface of the fixed plate 703, the output end of the electric push rod 608 is movable through the inside of the screening box 701, the outer surface of the push claw rake 609 is located near the bottom inside one of the conical protective covers 709, two support frames 2 are fixedly installed near one side of the top of the bottom plate 1, and the tops of the two support frames 2 are fixedly installed on the bottom of the crushing box 401. The control system 3 is set on the top of the bottom plate 1. The corner of the bottom of the screening box 701 is fixedly installed on the top of the bottom plate 1 near the other side through an auxiliary rod.

[0046] Working principle of this embodiment: When in use, the jaw crushing assembly 4 is mainly composed of a crushing box 401, a power mechanism 402, a movable jaw assembly 403, a movable jaw plate 404 and a static jaw plate 405. The power mechanism 402 is generally composed of a motor, a driving wheel and a V-belt, which drives the flywheel, eccentric shaft and other moving parts in the movable jaw assembly 403 to complete the crushing process. The movable jaw assembly 403 is a key part of the crushing, and is composed of an eccentric shaft, a transparent cover, a retaining ring, a bearing, a pulley, a flywheel, etc. The power mechanism 402 is started by the control system 3, and the motor drives the driving wheel and the V-belt to rotate, and then drives the flywheel in the movable jaw assembly 403 to rotate, and the movable jaw plate 404 moves up and down through the eccentric shaft. When the movable jaw plate 404 rises, the toggle plate and the movable jaw plate 404 The angle becomes larger, pushing the movable jaw plate 404 to approach the static jaw plate 405. At this time, the barium slag sandwiched between the two jaw plates is crushed by being squeezed, bent and split. When the movable jaw plate 404 moves downward, the angle between the toggle plate and the movable jaw plate 404 becomes smaller. The movable jaw plate 404 leaves the static jaw plate 405 under the action of the pull rod and the spring. The crushed material enters the crushing box 501 through the feed pipe 502 under the action of gravity. The barium slag is initially crushed by the jaw crushing assembly 4. The driving motor 503 is started to drive one of the crushing rollers 505 and the gear 504 to rotate, and then the other gear 504 meshing with it is driven to rotate in the opposite direction, thereby driving the other crushing tube 505 to rotate in the opposite direction. At this time, the two crushing rollers 505 move toward the center of the crushing box 501. The barium slag that has been crushed for the first time is crushed for the second time to improve the crushing effect. The crushed barium slag falls downward onto the inclined buffer plate 602. The inclined buffer plate 602 reduces the speed at which the barium slag falls downward to prevent the barium slag from directly impacting the first screen 707, causing damage to the first screen 707 and affecting the screening effect. The barium slag moves along the smooth inclined surface of the inclined buffer plate 602 to the guide plate 607. When a certain amount of barium slag accumulates on the guide plate 607, the forward and reverse motor 604 is started. The rotation of the output end of the forward and reverse motor 604 drives the rotating rod 605 to rotate, and then further drives the rotating block 606 and the guide plate 607 to rotate, so that the guide plate 607 is in an inclined state, and the side close to the reinforcing rib 603 rotates downward, away from the reinforcing rib 603. One side of 03 is tilted upward, so that the barium slag on the guide plate 607 slowly slides to the inside of the left side of the first screen 707, that is, the barium slag falls to the inside of the first screen 707 near the push claw rake 609, so as to achieve the effect of slowly unloading, and avoid the barium slag from concentrating on a certain place of the first screen 707, causing damage to the first screen 707, and then the output end of the forward and reverse motor 604 rotates in the reverse direction, driving the guide plate 607 to rotate and reset, and then the electric push rod 608 is started to push the push claw rake 609 to move toward the discharge plate 710, and the barium slag accumulated in the first screen 707 is pushed to other positions in the first screen 707, so that the barium slag is spread evenly inside the first screen 707, and the screening is better carried out, and it is avoided that it accumulates in a certain place and affects the screening efficiency.Then the electric push rod 608 pulls the push claw rake 609 to reset, starts the vibration motor 706 in advance, drives the vibration plate 704 to vibrate up and down inside the movable hole 712, and drives the first screen 707 and the second screen 708 to vibrate up and down at the same time under the elastic support of the first spring 713 and the second spring 714. The barium slag smaller than 1.18 mm passes through the first screen 707 and falls down to the second screen 708 for secondary screening. The barium slag larger than 1.18 mm moves to the corresponding discharge plate 710 under the vibration thrust and is discharged outward. The staff will The barium slag larger than 1.18 mm is transported to the double-shaft crushing assembly 5 again through the feed pipe 502 for crushing, and the barium slag smaller than 0.5 mm falls into the discharge hopper 702 through the mesh of the second screen 708, thereby discharging the barium slag of 0.5 mm. The barium slag larger than 0.5 mm and smaller than 1.18 mm on the second screen 708 is discharged through the corresponding discharge plate 710, and this part of the barium slag is sent to the planetary ball mill for grinding, so that the barium slag is smaller than 0.5 mm. The barium slag is double-screened by the screening assembly 7 to improve the screening effect.

[0047] Embodiment 2: According to Figure 1-Figure 17 As shown, the method for reducing and recycling industrial barium slag using gravity separation technology includes the following steps:

[0048] The first step is to restore the barium slag to its factory state;

[0049] In the second step, the barium slag in the factory state of the reduced barium slag was screened and divided into two groups with a particle size of less than 0.5 mm and a particle size of greater than 0.5 mm and less than 1.18 mm, with a yield of 33% and 66% respectively, and a jigging shaker test was performed;

[0050] The third step is to grind the barium slag with a particle size greater than 0.5 mm after screening to less than 0.5 mm and then conduct a jigging shaker test, wherein the barium slag includes: by weight, 30-35 parts of SiO2, 25-30 parts of BaO, 17-22 parts of SO3, 5-10 parts of Fe2O3, 3-4 parts of Na2O, 3-4 parts of Al2O3, and 0-1 parts of MgO; the barium slag with a particle size less than 0.5 mm includes: by weight, 40-45 parts of BaO, 20-25 parts of SiO2, 15-20 parts of SO3, 5-10 parts of CaO, 5-10 parts of Fe2O3, and 3-4 parts of Al2O3. The barium slag with a particle size greater than 0.5 mm and less than 1.18 mm includes: by weight, 40-45 parts of BaO, 20-25 parts of SiO2, 15-20 parts of SO3, 5-10 parts of CaO, 5-10 parts of Fe2O3, and 3-4 parts of Al2O3. The barium slag with a particle size greater than 0.5 mm is ground to less than 0.5 mm.

[0051] The working principle of this embodiment is as follows: when in use, the barium slag is double-crushed by the jaw crushing component 4 and the double-shaft crushing component 5 to restore the factory shape of the barium slag, and the crushed barium slag is transported to the screening component 7 for screening by the material guide component 6. The mesh size of the first screen 707 is 1.18 mm, and the mesh size of the second screen 708 is 0.5.mm. The newly generated barium slag is separated by the first screen 707 (i.e., the 1.18 mm sieve) to obtain barium slag with a particle size of less than 1.18 mm, and then the second screen 708 (i.e., the 0.5.mm sieve) is used to further divide it into two groups: one with a particle size of less than 0.5 mm and one with a particle size of greater than 0.5 mm and less than 1.18 mm. The particles with a particle size greater than 0.5 mm are ground to a particle size of less than 0.5 mm, and a total of four groups are subjected to jig shaker tests. A concentrate with a barium sulfate content of up to 50±3% can be obtained, thereby realizing the beneficiation and recycling of the barium slag.

[0052] The chemical composition of the barium slag used in the present invention is shown in Table 1. The detection method is: X-ray fluorescence spectrometry (XRF), using a Japanese Shimadzu XRF-1800 X-ray fluorescence spectrometer to measure secondary X-rays for material composition analysis.

[0053] Table 1 Barium slag XRF

[0054]

[0055] The mineral composition of barium slag is as follows Fig.11 The detection method is: X-ray diffraction analysis (XRD), using German Bruker D8ADVANCE X-Ray Diffractometer for crystal structure, material composition and microstructure analysis. XRD test parameters are as follows: wavelength 1.54A, tube current 100mA, tube voltage 40kV, step length 0.02°, sample scanning start angle 10°, end angle 90°, scanning speed 10° / min, X-ray source is copper target. MDI Jade 6.0 is used for phase analysis of test data.

[0056] The specific experimental steps are as follows:

[0057] Step 1: Select raw materials with a diameter less than 0.5 mm for gravity separation test. After the shaking table jigging test, the test results are as follows: Fig.12 As shown, it has a more obvious strip distribution. The test results are shown in Table 2. The barium content of the concentrate is the highest, 50.72%, followed by the tailings, and the middlings have the least content.

[0058] Table 2: less than 0.5mm shaker test results

[0059]

[0060] Step 2: Select raw materials with a diameter less than 1.18 mm for gravity separation test. After the shaking table jigging test, the test results are as follows: Fig.13As shown, there is no obvious strip distribution. The test results are shown in Table 3. The barium content of the concentrate is the highest, 42.46%, followed by the tailings, and the middlings have the least content.

[0061] Table 3: Test results of shaking table less than 1.18 mm

[0062]

[0063] Step 3: Select raw materials with a concentration greater than 0.5 for gravity separation test. After the shaking table jigging test, the test results are as follows: Fig.14 As shown, there is no obvious strip distribution. The test results are shown in Table 4. The barium content of the concentrate is the highest at 39.89%, followed by the tailings, and the middlings have the least content.

[0064] Table 4 Greater than 0.5mm shaker test results

[0065]

[0066] Step 4: Grind the particles larger than 0.5mm to less than 0.5mm for gravity separation experiment. The detection content shows that the distribution effect of barium content in the concentrate tailings larger than 0.5mm is not obvious, and the highest barium content in the concentrate is only 32.61%. Grind the raw materials larger than 0.5mm with a planetary ball mill for 2 minutes and sieve once until all particle sizes are less than 0.5mm. Fig.15 Compared with the unground particles with a particle size of less than 0.5 mm, as shown in Table 5, there is no over-grinding.

[0067] Table 5 Comparison of particle size less than 0.5 mm before grinding and less than 0.5 mm after grinding

[0068]

[0069] After the shaking table jigging test, the test results are as follows Fig.16 As shown, there is a very obvious strip distribution. The test results are shown in Table 6. The barium content of the concentrate is the highest at 43.75, followed by the tailings, and the middlings have the least content.

[0070] Table 6: Shaking table test results after grinding less than 0.5 mm

[0071]

[0072]

[0073] like Fig.17 As shown, the surface of the barium slag is uneven, with small particles protruding. It is preliminarily judged that the barite here has not reacted completely, and the general morphology of barite is retained, which is not much different from the barium slag in barite. It is further confirmed that this is the product of incomplete reaction of barite. The surface of the barium slag is smooth and dense, without obvious pore structure, so it is judged that the barite here has been melted after high-temperature calcination.

[0074] In the present invention, when in use, the vibration motor 706, the power mechanism 402, the movable jaw assembly 403, the drive motor 503, the forward and reverse motor 604, the electric push rod 608 and the control system 3 are electrically connected, the power mechanism 402 is started by the control system 3, the motor drives the drive wheel and the V-belt to rotate, and then drives the flywheel in the movable jaw assembly 403 to rotate, and the movable jaw plate 404 moves up and down through the eccentric shaft. When the movable jaw plate 404 rises, the angle between the toggle plate and the movable jaw plate 404 becomes larger, pushing the movable jaw plate 404 to approach the static jaw plate 405. At this time, the barium slag sandwiched between the two jaw plates is crushed by extrusion, bending and splitting. When the movable jaw plate 404 descends, the angle between the toggle plate and the movable jaw plate 404 becomes smaller, and the movable jaw plate 404 moves between the pull rod and the spring. The crushed material leaves the static jaw plate 405 under the action of gravity, and enters the crushing box 501 through the feeding pipe 502 under the action of gravity. The barium slag is initially crushed by the jaw crushing component 4, and the driving motor 503 is started to drive one of the crushing rollers 505 and the gear 504 to rotate, and then drives the other gear 504 meshing with it to rotate in the opposite direction, thereby driving the other crushing tube 505 to rotate in the opposite direction. At this time, the two crushing rollers 505 rotate toward the center of the crushing box 501 to perform secondary crushing on the initially crushed barium slag. The crushed barium slag falls downward onto the inclined buffer plate 602, and the inclined buffer plate 602 reduces the speed at which the barium slag falls downward, and the barium slag moves along the smooth inclined surface of the inclined buffer plate 602 to the guide plate 607 When a certain amount of barium slag accumulates on the guide plate 607, the forward and reverse motor 604 is started to drive the rotating rod 60, the rotating block 606 and the guide plate 607 to rotate, so that the guide plate 607 is tilted, the side close to the reinforcing rib 603 rotates downward, and the side away from the reinforcing rib 603 tilts upward, so that the barium slag on the guide plate 607 slowly slides to the inside of the left side of the first screen 707 to prevent the barium slag from concentrating on a certain part of the first screen 707. Then the output end of the forward and reverse motor 604 rotates in the reverse direction to drive the guide plate 607 to rotate and reset. Then the electric push rod 608 is started to push the push claw rake 609 to move toward the discharge plate 710, and push the barium slag accumulated in the first screen 707 to other positions in the first screen 707, so that the barium The slag is spread evenly inside the first screen 707 for better screening. Then the electric push rod 608 pulls the push claw rake 609 to reset, and the vibration motor 706 is started in advance to drive the vibration plate 704 to vibrate up and down inside the movable hole 712. Under the elastic support of the first spring 713 and the second spring 714, the first screen 707 and the second screen 708 are driven to vibrate up and down at the same time. The barium slag smaller than 1.18 mm passes through the first screen 707 and falls down to the second screen 708 for secondary screening. The barium slag larger than 1.18 mm moves to the corresponding discharge plate 710 under the vibration thrust and is discharged outward. The staff transports the barium slag larger than 1.18 mm to the double-shaft crushing assembly 5 again through the feed pipe 502 for crushing. At the same time, the barium slag smaller than 0.The barium slag with a size of 5 mm falls into the discharge hopper 702 through the mesh of the second screen 708, thereby discharging the barium slag with a size of 0.5 mm. The barium slag with a size larger than 0.5 mm and smaller than 1.18 mm on the second screen 708 is discharged through the corresponding discharge plate 710, and this part of the barium slag is sent to the planetary ball mill for grinding, so that the barium slag is less than 0.5 mm. The barium slag is double-crushed by the jaw crushing component 4 and the double-shaft crushing component 5 to restore the barium slag to its factory form. The crushed barium slag is transported to the screening component 7 through the material guide component 6 for screening, and the newly generated barium slag is separated by the first screen 707 (i.e., 1.18mm screen) to obtain barium slag with a particle size of less than 1.18mm. Then, the second screen 708 (i.e., 0.5.mm screen) is used to further divide it into two groups: one with a particle size of less than 0.5mm and one with a particle size of greater than 0.5mm and less than 1.18mm. The particles with a particle size of greater than 0.5mm are ground to a particle size of less than 0.5mm, and a total of four groups are subjected to jig shaker tests. The highest barium sulfate content can be 50±3% of the concentrate, realizing the beneficiation and recycling of the barium slag. .

[0075] The specific experimental steps are as follows:

[0076] Step 1: Select raw materials with a size less than 0.5 mm for gravity separation test. After the shaking table jigging test, it has obvious strip distribution, the barium content of the concentrate is the highest at 82.46%, followed by the tailings, and the content of the middlings is the lowest;

[0077] Step 2: Select raw materials with a diameter less than 1.18 mm for gravity separation test. After the shaking table jigging test, the test results are as follows: Fig.13 As shown, there is no obvious strip distribution. The test results are shown in Table 3. The barium content of the concentrate is the highest at 68.01%, followed by the tailings, and the content of the middlings is the lowest.

[0078] Step 3: Select raw materials with a concentration greater than 0.5 for gravity separation experiments. After the shaking table jigging test, there is no obvious strip distribution. The barium content of the concentrate is the highest at 39.89%, followed by the tailings, and the content of the middlings is the lowest.

[0079] Step 4, select larger than 0.5mm and grind to less than 0.5mm for gravity separation experiment. The detection content shows that the distribution effect of barium content in concentrate, middlings and tailings larger than 0.5mm is not obvious, and the highest barium content in concentrate is only 32.61%. The raw materials with particle size larger than 0.5 are ground with a planetary ball mill for 2 minutes and sieved once until all particle sizes are less than 0.5mm. After the shaking table jigging test, there is a very obvious strip distribution. The barium content of concentrate is the highest at 67.78, followed by tailings, and the content of middlings is the lowest.

[0080] The wiring diagram of the control system 3, power mechanism 402, movable jaw assembly 403, drive motor 503, forward and reverse motor 604, electric push rod 608 and vibration motor 706 in the present invention is common knowledge in the field, and its working principle is a well-known technology. The model is selected according to the actual use, so the control method and wiring layout of the negative pressure pump 501 will not be explained in detail.

[0081] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. 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 device for reducing and recycling industrial barium slag by using gravity separation technology, comprising a bottom plate (1), a jaw crushing assembly (4) is arranged on the top of the bottom plate (1), and the jaw crushing assembly (4) is used for primary crushing of the barium slag, characterized in that: A double-shaft crushing assembly (5) is arranged at the bottom of the jaw crushing assembly (4), a material guide assembly (6) is arranged at the bottom of the double-shaft crushing assembly (5), a screening assembly (7) is arranged at the bottom of the material guide assembly (6), the double-shaft crushing assembly (5) is used to perform secondary crushing on the barium slag, the material guide assembly (6) is used to transport the crushed barium slag to the screening assembly (7), and the screening assembly (7) is used to perform double screening on the barium slag; The jaw crushing assembly (4) comprises a crushing box (401), a power mechanism (402) is arranged on the top of the crushing box (401), a movable jaw assembly (403) is arranged inside the crushing box (401), a movable jaw plate (404) is arranged on the outer surface of the movable jaw assembly (403), and a static jaw plate (405) is arranged on one side inside the crushing box (401); The double-shaft crushing assembly (5) comprises a crushing box (501), the top of the crushing box (501) is fixedly connected to a feed pipe (502), the top of the feed pipe (502) is fixedly connected to the bottom of the crushing box (401), a driving motor (503) is installed on the front surface of the crushing box (501) through an auxiliary plate, and two crushing rollers (505) are movably embedded inside the crushing box (501), and the outer surfaces of the two crushing rollers (505) are meshed with each other.

2. The device for reducing and recycling industrial barium slag using gravity separation technology according to claim 1 is characterized in that: The two ends of the two crushing rollers (505) are movably connected to the front surface and the rear surface of the crushing box (501), respectively; a gear (504) is fixedly installed on the outer surface of the two crushing rollers (505) near one end; the outer surfaces of the two gears (504) are meshed; and the output end of the driving motor (503) is fixedly connected to one end of one of the crushing rollers (505).

3. The device for reducing and recycling industrial barium slag using gravity separation technology according to claim 2 is characterized in that: The screening assembly (7) comprises a screening box (701), the bottom of the screening box (701) is fixedly connected to a discharge hopper (702), a fixed plate (703) is fixedly installed on the outer surface of one side of the screening box (701), two movable holes (712) are provided on the outer surface of one side of the screening box (701), two vibration holes (715) are provided on the outer surface of the other side of the screening box (701), a vibration plate (704) is movably embedded in the two movable holes (712), a vibration motor (706) is arranged inside the vibration plate (704), and a first screen (707) is fixedly installed on the outer surface of one side of the vibration plate (704) near the top.

4. The device for reducing and recycling industrial barium slag using gravity separation technology according to claim 3 is characterized in that: A second screen (708) is fixedly installed on the outer surface of one side of the vibration plate (704) near the bottom, and the outer surface of the first screen (707) and the outer surface of the second screen (708) are movably embedded in the interior of the screening box (701). Limit rods (711) are fixedly installed at the four corners inside the screening box (701), and the bottom ends of the four limit rods (711) are movably passed through the first screen (707) and the second screen (708) to the bottom, and the outer surfaces of the four limit rods (711) near the bottom are movably sleeved with first springs (713).

5. The device for reducing and recycling industrial barium slag using gravity separation technology according to claim 4 is characterized in that: One end of the four first springs (713) are respectively fixedly connected to the four corners of the inner bottom surface of the screening box (701), and the other ends of the four first springs (713) are respectively fixedly connected to the four corners of the bottom of the second screen (708). The outer surfaces of the four limit rods (711) are movably sleeved with second springs (714), and one end of the four second springs (714) are respectively fixedly connected to the four corners of the bottom of the first screen (707), and the other ends of the four second springs (714) are respectively fixedly connected to the four corners of the inner bottom surface of the second screen (708).

6. The device for reducing and recycling industrial barium slag using gravity separation technology according to claim 5 is characterized in that: Conical protective covers (709) are fixedly mounted on the top of the first sieve (707) and the top of the second sieve (708), and the outer surfaces of the two conical protective covers (709) are in contact with the inner wall of the screening box (701); discharge plates (710) are fixedly mounted on the outer surface of one side of the first sieve (707) and the outer surface of one side of the second sieve (708), and the outer surfaces of the two discharge plates (710) are movably embedded in the inside of two vibration holes (715), respectively; a plurality of supporting telescopic rods (705) are fixedly mounted on the bottom of the vibration plate (704), and the bottom ends of the plurality of supporting telescopic rods (705) are fixedly mounted on the bottom surface of the fixed plate (703).

7. The device for reducing and recycling industrial barium slag using gravity separation technology according to claim 6 is characterized in that: The material guide assembly (6) comprises a material guide hopper (601), an inclined buffer plate (602) is fixedly installed inside the material guide hopper (601), a plurality of reinforcing ribs (603) are fixedly installed at the bottom of the inclined buffer plate (602), a forward and reverse motor (604) is fixedly installed on the rear surface of the screening box (701) through an auxiliary plate, a rotating rod (605) is fixedly installed at the output end of the forward and reverse motor (604), and a rotating rod (605) is fixedly installed on the outer surface of the rotating rod (605). Block (606), a guide plate (607) is fixedly installed on the top of the rotating block (606), the outer surface of the guide plate (607) is movably embedded in the interior of the guide hopper (601), one end of the rotating rod (605) is movably inserted into the interior of the screening box (701), one end of the rotating rod (605) is movably embedded in the front surface wall of the screening box (701) near the top, and the top of the guide hopper (601) is fixedly connected to the bottom of the crushing box (501).

8. The device for reducing and recycling industrial barium slag using gravity separation technology according to claim 7 is characterized in that: The bottom of the guide hopper (601) is fixedly connected to the top of the screening box (701), and the bottom ends of the plurality of reinforcing ribs (603) are fixedly installed on one side of the guide hopper (601). An electric push rod (608) is fixedly installed on one side of the interior of the fixed plate (703) near the top, and a push claw rake (609) is fixedly installed on the output end of the electric push rod (608). Two support rods (610) are fixedly installed on the outer surface of one side of the push claw rake (609), and one end of the two support rods (610) can be movably penetrated from the screening box (701) to the outer surface of the fixed plate (703). The output end of the electric push rod (608) can be movably penetrated into the interior of the screening box (701), and the outer surface of the push claw rake (609) is located inside one of the conical protective covers (709) near the bottom.

9. The device for reducing and recycling industrial barium slag using gravity separation technology according to claim 8 is characterized in that: Two support frames (2) are fixedly mounted on the top of the bottom plate (1) near one side, and the tops of the two support frames (2) are fixedly mounted on the bottom of the crushing box (401). A control system (3) is arranged on the top of the bottom plate (1), and the bottom corner of the screening box (701) is fixedly mounted on the top of the bottom plate (1) near the other side via an auxiliary rod.

10. A method for reducing and recycling industrial barium slag using gravity separation technology, using the device for reducing and recycling industrial barium slag using gravity separation technology as claimed in claim 9, characterized in that: The steps include: The first step is to restore the barium slag to its factory state; In the second step, the barium slag in the factory state of the reduced barium slag was screened and divided into two groups with a particle size of less than 0.5 mm and a particle size of greater than 0.5 mm and less than 1.18 mm, with a yield of 33% and 66% respectively, and a jigging shaker test was performed; The third step is to grind the barium slag with a particle size greater than 0.5 mm after screening to less than 0.5 mm and then conduct a jigging shaker test, wherein the barium slag includes: by weight, 30-35 parts of SiO2, 25-30 parts of BaO, 17-22 parts of SO3, 5-10 parts of Fe2O3, 3-4 parts of Na2O, 3-4 parts of Al2O3, and 0-1 parts of MgO; the barium slag with a particle size less than 0.5 mm, the barium slag with a particle size greater than 0.5 mm and less than 1.18 mm includes: by weight, 40-45 parts of BaO, 20-25 parts of SiO2, 15-20 parts of SO3, 5-10 parts of CaO, 5-10 parts of Fe2O3, and 3-4 parts of Al2O3, and the barium slag with a particle size greater than 0.5 mm is ground to less than 0.5 mm.

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