System for recovering, separating and utilizing slag iron in steelmaking slag

Abstract

The system comprises a vibration hopper, a magnetic separation screening mechanism and a first-stage crushing mechanism, a first conveying belt with the bottom end extending to the position below a discharging hopper of the vibration hopper is arranged on the rear side of the vibration hopper, and a plurality of supporting vertical rods are vertically and fixedly connected to the two sides of the middle of the first conveying belt; the magnetic separation screening mechanism is arranged at the top ends of the multiple supporting vertical rods and comprises two fixing transverse plates transversely and fixedly connected to the top ends of the multiple supporting vertical rods on the two sides in the width direction of the first conveying belt, and the two sides between the two fixing transverse plates are transversely and rotationally connected with rotating shafts arranged in the length direction of the first conveying belt. The invention relates to the technical field of steel slag treatment. According to the system for recycling, separating and utilizing the slag iron in the steelmaking slag, by arranging the magnetic separation screening mechanism, the device can screen the slag iron according to the size during magnetic separation through the structure, so that the working procedures are reduced, and the processing cost is also reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of steel slag treatment, and particularly to a system for recycling and separating slag and iron in steelmaking slag. Background Art

[0002] Steel slag is a by-product in the steelmaking process. It is composed of various oxides formed by the oxidation of impurities such as silicon, manganese, phosphorus, and sulfur in pig iron during the smelting process, as well as salts formed by the reaction of these oxides with solvents. Steel slag contains various useful components: 2% - 8% of metallic iron, 40% - 60% of calcium oxide, 3% - 10% of magnesium oxide, and 1% - 8% of manganese oxide. Therefore, it can be used as a raw material for iron and steel metallurgy.

[0003] There are two main ways to comprehensively utilize steel slag as a secondary resource. One is to recycle it as a smelting solvent in the factory, which can not only replace limestone but also recover a large amount of metallic iron and other useful elements from it. The other is to use it as a raw material for making road construction materials, building materials, or agricultural fertilizers. However, before recycling steel slag, it needs to be separated to separate steel slag with different iron contents for convenient separate treatment. Currently, the preliminary separation of steel slag is often carried out through a magnetic separator device. However, the magnetic separator can only screen out particles with a relatively high iron content and cannot perform further precise size subdivision on these particles. Summary of the Invention

[0004] In view of the deficiencies of the prior art, the present invention provides a system for recycling and separating slag and iron in steelmaking slag, which solves the problem that the preliminary separation of steel slag is often carried out through a magnetic separator device at present, but the magnetic separator can only screen out particles with a relatively high iron content and cannot perform further precise size subdivision on these particles.

[0005] To achieve the above objectives, the present invention is realized through the following technical solutions: A system for recycling and separating slag and iron in steelmaking slag includes a vibrating hopper, a magnetic separation and screening mechanism, and a primary crushing mechanism;

[0006] A first conveyor belt with its bottom end extending below the discharge hopper is arranged at the rear side of the vibrating hopper. A plurality of support vertical rods are vertically and fixedly connected to both sides of the middle of the first conveyor belt. The magnetic separation and screening mechanism is arranged at the top of the plurality of support vertical rods;

[0007] The magnetic separation and screening mechanism includes two fixed cross plates horizontally and fixedly connected to the tops of a plurality of the support vertical rods on both sides along the width direction of the first conveyor belt. On both sides between the two fixed cross plates, there are horizontally rotatably connected shafts arranged along the length direction of the first conveyor belt. The outer surfaces of the two shafts are fixedly connected with a plurality of corresponding belt pulleys respectively. Each two corresponding belt pulleys are connected by a belt in transmission. The outer surfaces of the plurality of belts are fixedly connected with a plurality of magnetic plates. Between a plurality of the support vertical rods on one side, there is fixedly connected a receiving hopper with its top extending below one side of the two fixed cross plates. Both sides of the top of the receiving hopper are fixedly connected with first connection seats. Between the two first connection seats, there is horizontally rotatably connected a scraper. A spring rod is hinged between the outer surface of the scraper and the receiving hopper.

[0008] Further, the bottom end of the receiving hopper is fixedly connected with a feeding cylinder. The top end of the feeding cylinder is fixedly connected with an inclined material guiding groove. The lower surface of the material guiding groove is vertically and throughly provided with a plurality of partition grooves along its length direction. The plurality of partition grooves are evenly spaced along the width direction of the material guiding groove.

[0009] Further, a vibration motor is fixedly connected to the bottom end of the material guiding groove.

[0010] Further, the magnetic plates on the plurality of belts are staggered in the vertical direction.

[0011] Further, the top open width of the receiving hopper is greater than the distance between the two fixed cross plates.

[0012] Further, the primary crushing mechanism is arranged below the rear end of the first conveyor belt. The primary crushing mechanism includes a plurality of vertically arranged support legs. Vertically and fixedly connected between the plurality of support legs is a device outer frame with open tops and bottoms. Horizontally opened on the rear side surface inside the device outer frame is a device groove. Horizontally slidably connected inside the device groove is a movable crushing block. Fixedly connected to the front side surface inside the device outer frame is a fixed crushing block that is the same in specification as and symmetrically arranged with the movable crushing block. Fixedly connected to the rear side of the outer surface of the device outer frame is an extension frame. The inner cavity of the extension frame communicates with the inside of the device groove. Vertically rotatably connected inside the extension frame is a crankshaft. Fixedly connected to the front side surface of the movable crushing block are a plurality of connection seats respectively corresponding to a plurality of shaft rods of the crankshaft. Between the corresponding connection seats and the shaft rods of the crankshaft, there are all hinged connecting rods.

[0013] Further, a motor is fixedly connected to the bottom end of the extension frame. The output shaft of the motor rotatably penetrates through the extension frame and is fixedly connected to one end of the crankshaft.

[0014] Further, a second conveyor belt with its bottom end extending below is arranged at the rear side of the primary crushing mechanism. An equipment table is arranged at the rear side of the second conveyor belt. A rod mill is arranged on the upper surface of the equipment table. The top end of the second conveyor belt extends above the feed inlet of the rod mill.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: In this steelmaking steel slag recovery and separation utilization system, by setting up a magnetic separation and screening mechanism, when the device is in use, after the slag and iron are fed into the vibrating hopper, they can be conveyed onto the first conveyor belt under its action and continue to move towards the subsequent equipment. During this process, multiple belt pulleys in the magnetic separation and screening mechanism rotate continuously, causing the belt to move continuously. Multiple magnetic plates on the surface of the belt can suck out the parts with higher iron content when passing above the slag and iron, and then be scraped off by the scraper and fall into the receiving hopper. Then, it falls along the feeding cylinder at the bottom end of the receiving hopper into the guiding chute and continues to descend under its own gravity. During this process, the slag and iron with smaller volume can fall through multiple partition slots, while the larger ones will directly move to the bottom end of the guiding chute and then fall. Through this structure, the size of the slag and iron can be screened while performing magnetic separation, reducing the processes and thus lowering the processing cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is the overall process structure schematic diagram of the present invention;

[0017] Figure 2 is the structure schematic diagram of the magnetic separation and screening mechanism of the present invention;

[0018] Figure 3 is the structure schematic diagram of the primary crushing mechanism of the present invention.

[0019] In the figure: 1 - vibrating hopper, 2 - first conveyor belt, 3 - support vertical rod, 4 - magnetic separation and screening mechanism, 41 - fixed horizontal plate, 42 - rotating shaft, 43 - belt pulley, 44 - magnetic plate, 45 - receiving hopper, 46 - scraper, 47 - spring rod, 48 - feeding cylinder, 49 - guiding chute, 410 - partition slot, 411 - vibrating motor, 5 - primary crushing mechanism, 51 - device outer frame, 52 - fixed crushing block, 53 - device slot, 54 - movable crushing block, 55 - extension frame, 56 - crankshaft, 57 - connecting seat, 58 - connecting rod, 59 - motor, 6 - second conveyor belt, 7 - equipment table, 8 - rod mill, 9 - third conveyor belt. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0021] Please refer to Figures 1-3 , the present invention provides a technical solution: a system for recycling and separating slag and iron in steelmaking slag, including a vibrating hopper 1, a magnetic separation and screening mechanism 4, and a primary crushing mechanism 5;

[0022] A first conveyor belt 2 with its bottom end extending below the discharge hopper is arranged at the rear side of the vibrating hopper 1. A plurality of support vertical rods 3 are vertically and fixedly connected to both sides of the middle of the first conveyor belt 2. The magnetic separation and screening mechanism 4 is arranged at the top of the plurality of support vertical rods 3;

[0023] The magnetic separation and screening mechanism 4 includes two fixed cross plates 41 horizontally and fixedly connected to the tops of the plurality of support vertical rods 3 on both sides along the width direction of the first conveyor belt 2. On both sides between the two fixed cross plates 41, rotating shafts 42 arranged along the length direction of the first conveyor belt 2 are horizontally rotatably connected. A plurality of and respectively corresponding belt pulleys 43 are fixedly connected to the outer surfaces of the two rotating shafts 42. Between each two corresponding belt pulleys 43, they are connected by a belt in transmission. A plurality of magnetic plates 44 are fixedly connected to the outer surfaces of the plurality of belts. A receiving hopper 45 with its top end extending below one side of the two fixed cross plates 41 is fixedly connected between the plurality of support vertical rods 3 on one side. First connection seats are fixedly connected to both sides of the top end of the receiving hopper 45. A scraping plate 46 is horizontally rotatably connected between the two first connection seats. A spring rod 47 is hinged between the outer surface of the scraping plate 46 and the receiving hopper 45.

[0024] The bottom end of the receiving hopper 45 is fixedly connected to a feeding cylinder 48. An inclined guide chute 49 is fixedly connected to the top end of the feeding cylinder 48. A plurality of partition grooves 410 are vertically and penetratingly opened on the lower surface of the guide chute 49 along its length direction. The plurality of partition grooves 410 are evenly spaced along the width direction of the guide chute 49.

[0025] A vibrating motor 411 is fixedly connected to the bottom end of the guide chute 49.

[0026] The magnetic plates 44 on the plurality of belts are staggered in the vertical direction.

[0027] When the device is in use, after the slag and iron are fed into the vibrating hopper 1, they can be conveyed onto the first conveyor belt 2 under its action and continue to move towards the subsequent equipment. During this process, multiple pulleys 43 in the magnetic separation and screening mechanism 4 rotate continuously, causing the belt to move continuously. Multiple magnetic plates 44 on the surface of the belt can suck out the parts with a higher iron content when passing above the slag and iron, and then be scraped off by the scraper 46 and fall into the receiving hopper 45. After that, it falls into the guide chute 49 along the feeding cylinder 48 at the bottom end of the receiving hopper 45 and continues to descend under its own gravity. During this process, the slag and iron with a smaller volume can fall through multiple partition slots 49, while the larger ones will directly move to the bottom end of the guide chute 49 and then fall. Through this structure, the size of the slag and iron can be screened while performing magnetic separation, reducing the process and thus lowering the processing cost.

[0028] A power motor is fixedly connected to the outer surface of a fixed cross plate 41. The output shaft of the power motor rotatably penetrates the fixed cross plate 41 and is fixedly connected to one end of a rotating shaft 42. By operating the power motor, the rotating shaft 42 can be driven to rotate, thereby driving multiple pulleys 43 to rotate. During the rotation of multiple pulleys 43, multiple belts will move continuously, and the magnetic plates 44 on them will move between the two pulleys 43. During this process, the slag blocks with a higher iron content can be attracted by the magnetism on them.

[0029] When the magnetic plate 44 moves to the position of the scraper 46, it can come into contact with the scraper 46. Then, under the action of the scraper 46, the slag blocks on the surface of the magnetic plate 44 will be scraped off and fall into the receiving hopper 45. Since the scraper 46 is supported by the spring rod 47, it can always be close to the magnetic plate 44 to ensure its scraping effect.

[0030] The top open width of the receiving hopper 45 is greater than the distance between the two fixed cross plates 41.

[0031] The top open width of the receiving hopper 45 being greater than the distance between the two fixed cross plates 41 can ensure that the slag blocks scraped off from the magnetic plate 44 can all fall into the receiving hopper 45.

[0032] The primary crushing mechanism 5 is arranged below the rear end of the first conveyor belt 2. The primary crushing mechanism 5 includes a plurality of vertically arranged support legs. Vertically fixedly connected between the plurality of support legs is a device outer frame 51 with an open top and bottom. Horizontally opened on the rear side surface inside the device outer frame 51 is a device groove 53. Horizontally slidably connected inside the device groove 53 is a movable crushing block 54. Fixedly connected to the front side surface inside the device outer frame 51 is a fixed crushing block 52 that has the same specification as and is symmetrically arranged with the movable crushing block 54. Fixedly connected to the rear side of the outer surface of the device outer frame 51 is an extension frame 55. The inner cavity of the extension frame 55 communicates with the inside of the device groove 53. Vertically rotatably connected inside the extension frame 55 is a crankshaft 56. Fixedly connected to the front side surface of the movable crushing block 54 are a plurality of connecting seats 57 that respectively correspond to the plurality of shafts of the crankshaft 56. Hinged between the corresponding connecting seats 57 and the shafts of the crankshaft 56 are connecting rods 58.

[0033] The fixed crushing block 52 and the movable crushing block 54 are symmetrically arranged, and the gap between the two gradually decreases from top to bottom. By rotating the crankshaft 56, the movable crushing block 54 can be driven to perform a horizontal reciprocating motion. In this process, the slag blocks entering between the fixed crushing block 52 and the movable crushing block 54 will be broken into smaller particles under the action of repeated impacts, facilitating subsequent processing of them.

[0034] Fixedly connected to the bottom end of the extension frame 55 is a motor 59. The output shaft of the motor 59 rotatably penetrates the extension frame 55 and is fixedly connected to one end of the crankshaft 56.

[0035] Fixedly connected to the bottom end of the extension frame 55 is a motor 59. The output shaft of the motor 59 rotatably penetrates the extension frame 55 and is fixedly connected to one end of the crankshaft 56.

[0036] The motor 59 drives the crankshaft 56 to rotate, thereby providing power to the primary crushing mechanism 5.

[0037] Behind the primary crushing mechanism 5 is arranged a second conveyor belt 6 with its bottom end extending below it. Behind the second conveyor belt 6 is arranged an equipment table 7. On the upper surface of the equipment table 7 is arranged a rod mill 8. The top end of the second conveyor belt 6 extends above the feed inlet of the rod mill 8.

[0038] After being crushed by the primary crushing mechanism 5, the slag blocks will fall onto the second conveyor belt 6 and then be conveyed to the rod mill 8. The rod mill 8 further crushes the slag blocks. On one side of the rod mill 8 is arranged a third conveyor belt 9. The bottom end of the third conveyor belt 9 extends to the discharge outlet of the rod mill 8. The slag blocks processed by the rod mill 8 will fall into the third conveyor belt 9 and continue to be conveyed backward. At the rear end of the third conveyor belt 9 is arranged a magnetic roller, which can perform magnetic separation on the finally crushed slag blocks again.

[0039] When the device is in use, after the slag and iron are fed into the vibrating hopper 1, they can be conveyed onto the first conveyor belt 2 under its action and continue to move into subsequent equipment. During this process, multiple pulleys 43 in the magnetic separation and screening mechanism 4 rotate continuously, causing the belt to move continuously. Multiple magnetic plates 44 on the surface of the belt can suck out the parts with a higher iron content when passing above the slag and iron, and then be scraped off by the scraper 46 and fall into the receiving hopper 45. After that, it falls into the guide chute 49 along the feeding cylinder 48 at the bottom end of the receiving hopper 45 and continues to descend under its own gravity. During this process, the slag and iron with a smaller volume can fall through multiple partition slots 49, while the larger ones will directly move to the bottom end of the guide chute 49 and then fall. Through this structure, the size of the slag and iron can be screened while performing magnetic separation, reducing the process steps and thus lowering the processing cost.

[0040] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or further includes elements inherent to such process, method, article or device.

[0041] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A system for recovering, separating and utilizing slag iron from steelmaking slag, characterized in that: It comprises a vibrating hopper (1), a magnetic separation and screening mechanism (4) and a primary crushing mechanism (5); The rear side of the vibrating hopper (1) is provided with a first conveyor belt (2) whose bottom end extends to below the discharge hopper, and both sides of the middle part of the first conveyor belt (2) are vertically fixedly connected with a plurality of supporting uprights (3), and the magnetic separation and screening mechanism (4) is arranged at the top ends of the plurality of supporting uprights (3); The magnetic separation and screening mechanism (4) comprises two fixed transverse plates (41) which are transversely fixedly connected to the top ends of the plurality of support uprights (3) on both sides along the width direction of the first conveyor belt (2); a rotating shaft (42) arranged along the length direction of the first conveyor belt (2) is transversely rotatably connected on both sides between the two fixed transverse plates (41); a plurality of pulleys (43) which are respectively corresponding to each other are fixedly connected to the outer surfaces of the two rotating shafts (42); each two corresponding pulleys (43) are connected via a belt transmission; a plurality of magnetic plates (44) are fixedly connected to the outer surfaces of the plurality of belts; a receiving hopper (45) whose top ends extend to below one side of the two fixed transverse plates (41) is fixedly connected between the plurality of support uprights (3) on one side; both sides of the top ends of the receiving hopper (45) are fixedly connected to first connecting seats; a scraper (46) is transversely rotatably connected between the two first connecting seats; a spring rod (47) is hinged between the outer surface of the scraper (46) and the receiving hopper (45).

2. The system for recovering, separating and utilizing slag iron from steelmaking slag according to claim 1, characterized in that: The bottom end of the receiving hopper (45) is fixedly connected to a feeding cylinder (48), and the top end of the feeding cylinder (48) is fixedly connected to an inclined material guide trough (49). The lower surface of the material guide trough (49) is vertically penetrated along its length direction with a plurality of dividing grooves (410), and the plurality of dividing grooves (410) are evenly spaced along the width direction of the material guide trough (49).

3. The system for recovering, separating and utilizing slag iron from steelmaking slag according to claim 1, characterized in that: The bottom end of the material guide trough (49) is fixedly connected to a vibration motor (411).

4. The system for recovering, separating and utilizing slag iron from steelmaking slag according to claim 1, characterized in that: The magnetic plates (44) on the plurality of belts are arranged alternately in the vertical direction.

5. The system for recovering, separating and utilizing slag iron from steelmaking slag according to claim 1, characterized in that: The width of the top opening of the receiving hopper (45) is greater than the distance between the two fixed transverse plates (41).

6. The system for recovering, separating and utilizing slag iron from steelmaking slag according to claim 1, characterized in that: The primary crushing mechanism (5) is arranged below the rear end of the first conveyor belt (2), and comprises a plurality of vertically arranged supporting legs, a device outer frame (51) with open top and bottom ends is vertically fixedly connected between the plurality of supporting legs, a device groove (53) is transversely opened on the rear side surface inside the device outer frame (51), a movable crushing block (54) is transversely slidably connected inside the device groove (53), and a movable crushing block (54) of the same specification and the same size as the movable crushing block (54) is fixedly connected on the front side surface inside the device outer frame (51). The fixed crushing blocks (52) are symmetrically arranged, and an extension frame (55) is fixedly connected to the rear side of the outer surface of the device outer frame (51), the inner cavity of the extension frame (55) is connected to the inside of the device groove (53), and the inside of the extension frame (55) is vertically rotatably connected to a crankshaft (56). The front side surface of the movable crushing block (54) is fixedly connected to a plurality of connecting seats (57) corresponding to a plurality of shafts of the crankshaft (56), and connecting rods (58) are hinged between the corresponding connecting seats (57) and the shafts of the crankshaft (56).

7. The system for recovering, separating and utilizing slag iron from steelmaking slag according to claim 6, characterized in that: A motor (59) is fixedly connected to the bottom end of the extension frame (55), and an output shaft of the motor (59) rotatably passes through the extension frame (55) and is fixedly connected to one end of the crankshaft (56).

8. The system for recovering, separating and utilizing slag iron from steelmaking slag according to claim 6, characterized in that: A second conveyor belt (6) is arranged on the rear side of the primary crushing mechanism (5) and its bottom end extends to below it. An equipment table (7) is arranged on the rear side of the second conveyor belt (6). A rod mill (8) is arranged on the upper surface of the equipment table (7). The top end of the second conveyor belt (6) extends to above the feed port of the rod mill (8).

Images