A high-temperature molten slag screening device

Abstract

The present application relates to a high-temperature molten slag screening device, belonging to the technical field of molten slag treatment, to solve the problem that the existing device is easy to be blocked by large foreign matters, the molten slag is bonded to the screen hole and the parts are impacted and damaged. It comprises a mounting bracket, a feed hopper, a conveying mechanism and a screening assembly. The feed hopper is provided with a coarse screening assembly (including a rotating rod I, a distribution rod and a balance weight) and a buffer damping assembly (including a rotating rod II, a buffer baffle and a damping damper). The screening assembly includes a fixed frame, a screening frame, a drive motor, a rotating shaft and an eccentric cam. A cleaning assembly (including a rotating sleeve, a movable swing rod, a transmission drive rod and a fixed swing rod) is arranged in the screening frame. A grid I is connected to a water inlet conduit and a drainage conduit. The high-temperature molten slag is separated from large foreign matters by coarse screening, and then falls into the screening frame after buffering. The drive motor drives the eccentric cam to vibrate the frame for screening. The cleaning assembly synchronously removes the bonded molten slag. Cooling medium flows through the grid I to achieve cooling and waste heat recovery.

Description

Technical Field

[0001] This invention belongs to the field of slag treatment technology and relates to a high-temperature slag screening device. Background Technology

[0002] In the metallurgical production of steel, non-ferrous metals, and other metals, high-temperature slag is an inevitable byproduct of the smelting process. For every ton of metal smelted, 0.3-1 ton of slag is usually generated. The temperature of this slag is generally maintained at 800-1500℃. It not only contains recyclable resources such as iron and alloys, but also carries a large amount of usable waste heat. If the high-temperature slag is directly discharged, it will not only cause serious waste of resources, but the slag will also occupy land and pollute the environment after cooling and hardening. Therefore, efficient screening and grading of high-temperature slag to realize resource recovery and waste heat reuse has become a key link in the metallurgical industry to practice the concept of green production.

[0003] Currently, the most widely used high-temperature slag screening devices in the industry mainly include three types: vibrating screens, drum screens, and inertial screens. Their core working principle is to use mechanical force (vibration, rotation, inertia) to force the slag through a screen surface with a specific aperture to complete the classification of coarse and fine slag. Among them, vibrating screens are popular due to their simple structure and low manufacturing cost. They use a motor to drive the eccentric block to rotate and generate high-frequency vibration, which drives the screen surface to vibrate synchronously to achieve screening. Drum screens rely on the rotation of the drum itself and the tilt angle of the screen surface to make the slag roll inside the drum to complete the classification. Inertial screens use the inertial reciprocating motion of the screen body to drive the relative motion between the slag and the screen surface to achieve separation.

[0004] However, in practical industrial applications, existing screening devices, limited by structural design flaws, struggle to meet the demands for efficient and stable production, revealing numerous prominent problems:

[0005] Firstly, the coarse screening function is missing or inefficient. The slag discharged from metallurgical furnaces often contains large foreign objects such as incompletely melted furnace charge and refractory material fragments. Existing devices mostly perform fine screening directly without setting up a targeted separation structure, which makes it easy for large foreign objects to clog the screen holes and impact the screen frame, causing screen surface deformation and damage to the drive mechanism, forcing the equipment to be shut down frequently for maintenance. Some devices that add fixed grids as coarse screens also have the problem of foreign objects getting stuck and needing to be cleaned manually, increasing the intensity of operation.

[0006] Secondly, the problem of screen clogging is prominent. High-temperature molten slag has strong viscosity and is easy to stick to the screen surface and screen holes during the screening process. Existing equipment mostly relies on screen vibration to achieve self-cleaning, but the cleaning effect is limited. It is necessary to stop the machine regularly for manual cleaning, which seriously affects the continuity of production.

[0007] Therefore, we propose a high-temperature slag screening device to solve the problems mentioned above. Summary of the Invention

[0008] In view of this, in order to solve the above problems, the present invention provides a high-temperature molten slag screening device.

[0009] To achieve the above objectives, the present invention provides the following technical solution: a high-temperature molten slag screening device, comprising:

[0010] Mounting bracket;

[0011] The feed hopper is fixed to the top of the mounting bracket. A coarse screening component is provided above the discharge port of the feed hopper, and a buffer and shock absorption component is provided at the discharge port.

[0012] The conveying mechanism is located at the bottom of the mounting bracket;

[0013] The screening assembly is mounted on the mounting bracket and located between the feed hopper and the conveying mechanism. It includes a fixed frame movably mounted on the mounting bracket, a screening frame fixed inside the fixed frame, a drive motor fixed at the top, and a rotating shaft rotatably mounted inside.

[0014] The eccentric cams are respectively fixed to both ends of the rotating shaft by key connection. The rotating shaft is connected to the output end of the drive motor by synchronous pulley and synchronous belt transmission.

[0015] A cleaning component is disposed within the screening frame;

[0016] In this process, after the high-temperature molten slag falls into the feed hopper, it is separated into large foreign objects by the coarse screening component, the buffer and shock absorption component reduces the impact of the molten slag, the drive motor drives the eccentric cam to rotate and cause the fixed frame to vibrate, the screening frame completes the molten slag classification, and the cleaning component simultaneously removes the molten slag adhering to the screen holes.

[0017] As a further improvement to the above technical solution:

[0018] The coarse screening assembly includes a rotating rod I that is rotatably mounted on the side wall of the feed hopper via a bearing. Multiple material distribution rods are fixed to the outer wall of the rotating rod I by welding. A waste discharge opening is provided on one side of the feed hopper. A guide plate I corresponding to the opening is fixed on the mounting bracket. Extension brackets are welded to both ends of the rotating rod I. A balance weight is fixed to the ends of the two extension brackets.

[0019] When a large piece of molten slag impacts the material distribution rod, the rotating rod I rotates to discharge the foreign object through the guide plate I. After the impact force disappears, the balance weight drives the material distribution rod to reset.

[0020] The buffer and shock absorption assembly includes a rotating rod II that is rotatably mounted on the side wall of the feed hopper via a bearing. An arc-shaped buffer baffle is welded to the outer wall of the rotating rod II. Shock absorbers are fixed on both sides of the feed hopper. Extension rods are welded to both ends of the rotating rod II. The ends of the extension rods abut against the piston rods of the shock absorbers.

[0021] When the molten slag impacts the buffer baffle, the extension rod squeezes the piston rod, the shock absorber absorbs the impact energy, and after the molten slag passes through, the piston rod pushes the structure to reset.

[0022] The mounting bracket has four spring seats I fixed on top, each spring seat I has a support spring fixed inside, and the top of the support spring has a spring seat II fixed on top. The four spring seats II are symmetrically welded to both sides of the fixed frame in pairs.

[0023] When the fixed frame vibrates, the support springs extend and retract to buffer the vibration and reduce the transmission of vibration to the mounting bracket.

[0024] The screening frame includes a connecting frame welded within a fixed frame. Multiple parallel grids I are welded within the connecting frame. Grids II are welded between adjacent grids I and between grids I and the connecting frame. Inlet pipes and outlet pipes are welded to both ends of the connecting frame, respectively.

[0025] The cleaning assembly includes multiple rotating sleeves, which are rotatably mounted to the grid I and the connecting frame through bearings. Adjacent rotating sleeves are connected by synchronous pulleys and synchronous belts, and one of the rotating sleeves is connected to the output end of the drive motor by synchronous belt.

[0026] The outer wall of the rotating sleeve is welded with multiple fixed swing rods. One side of each fixed swing rod is attached to the grid I. The rotating sleeve drives the fixed swing rods to rotate and scrape the adhesive slag on the surface of the grid I.

[0027] A transmission drive rod is provided through the rotating sleeve. Multiple sets of waist-shaped holes are opened on the outer wall of the rotating sleeve. A connecting block is slidably assembled in the waist-shaped hole. One end of the connecting block is welded to the outer wall of the transmission drive rod. Multiple movable swing rods are sleeved on the outer wall of the rotating sleeve. The movable swing rods are located between adjacent fixed swing rods and are fixedly connected to the outer end of the connecting block. The transmission drive rod drives the movable swing rods to move axially to clean the other side of the grid I and one side of the grid II.

[0028] One end of the transmission drive rod passes through the fixed frame, and a fixed rod is welded to the outside of the fixed frame. A positioning and fixing ring is sleeved on the outer wall of the transmission drive rod, and the positioning and fixing ring passes through and is fixed to one side of the fixed rod. A spiral guide groove is opened on the outer wall of one end of the transmission drive rod, and the slider in the positioning and fixing ring is slidably assembled in the spiral guide groove. When the transmission drive rod rotates, it is converted into axial reciprocating motion through the spiral guide groove.

[0029] A protective sleeve is fitted at one end of the transmission drive rod, and the protective sleeve is fixed to one side of the fixed rod by a flange; one end of the protective sleeve is provided with an end cap with a lip seal ring to prevent molten slag splashing and dust intrusion, and to protect the internal transmission structure.

[0030] The conveying mechanism includes a geared motor, a drive roller, a driven roller, and a high-temperature resistant conveyor belt fixed to the bottom of the mounting bracket. The drive roller and the geared motor are connected by a flexible coupling. The conveyor belt is tensioned between the drive roller and the driven roller. The conveyor belt is uniformly provided with idler rollers below it and has integrally formed side guards on both sides. The screened fine slag is smoothly conveyed to the collection bin by the conveyor belt.

[0031] The beneficial effects of this invention are as follows:

[0032] 1. The high-temperature molten slag screening device disclosed in this invention has a coarse screening component that actively identifies and separates large foreign objects (such as unmelted furnace charge, refractory material fragments, etc.) in the molten slag through a gravity linkage structure between the material distribution rod and the balance counterweight, thus preventing large foreign objects from entering subsequent screening stages and causing blockages or structural damage; the grid I and grid II of the screening frame intersect to form a regular screen surface, which can perform fine classification of molten slag, solving the problems of chaotic screening process and poor classification effect in traditional devices;

[0033] 2. The high-temperature molten slag screening device disclosed in this invention has an arc-shaped buffer baffle of the buffer and shock absorption component that can withstand the impact of molten slag and guide it to be evenly dispersed. Combined with the damping effect of the hydraulic shock absorber, it can effectively absorb the kinetic energy of the falling molten slag, avoid the high-speed molten slag from causing hard impact on the core screening components, and at the same time make the molten slag spread smoothly on the screen surface, improve the screening uniformity, and extend the overall service life of the device.

[0034] 3. The high-temperature slag screening device disclosed in this invention uses a drive motor to achieve linkage drive of the cleaning component. The rotating sleeve drives the movable swing arm to rotate and scrape one side of the grid I. The transmission drive rod drives the fixed swing arm to reciprocate and rub the other side of the grid I and one side of the grid II, forming a "rotation + axial" dual cleaning action, which can completely peel off the sticky slag, avoid screen hole blockage, eliminate the need for manual slag removal and ensure continuous and stable operation of the equipment.

[0035] 4. The high-temperature molten slag screening device disclosed in this invention has a hollow structure for the grid I connected to the cooling circuit. When the cooling medium flows through the inside of the grid, it can carry away the high temperature conducted by the molten slag, prevent the grid from deforming and oxidizing due to long-term high temperature, and ensure the stability of the screen hole size. The cooling medium that absorbs heat can be connected to a heat exchanger to realize the reuse of waste heat, providing energy for workshop heating, hot water supply, etc., which meets the requirements of energy-saving production.

[0036] Other advantages, objectives, and features of the invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination, or may be learned from practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0037] To make the objectives, technical solutions, and advantages of the present invention clearer, the preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, wherein:

[0038] Figure 1 This is a three-dimensional structural schematic diagram of a high-temperature slag screening device according to the present invention;

[0039] Figure 2 This is a schematic diagram of the feed hopper structure of a high-temperature molten slag screening device according to the present invention;

[0040] Figure 3 This is a partial cross-sectional view of the feed hopper of a high-temperature molten slag screening device according to the present invention.

[0041] Figure 4 This is a schematic diagram of the screening component structure of a high-temperature molten slag screening device according to the present invention;

[0042] Figure 5 This is a schematic diagram of the screening component of a high-temperature molten slag screening device according to the present invention from another perspective.

[0043] Figure 6 This is a schematic diagram of the screening frame structure of a high-temperature molten slag screening device according to the present invention;

[0044] Figure 7 This is an exploded structural diagram of the cleaning component of a high-temperature slag screening device according to the present invention.

[0045] Reference numerals: 1. Mounting bracket; 2. Feed hopper; 3. Screening assembly; 31. Spring seat I; 32. Support spring; 33. Spring seat II; 34. Fixed frame; 35. Screening frame; 351. Connecting frame; 352. Grating I; 353. Grating II; 354. Rotating sleeve; 3541. Waist-shaped hole; 355. Movable swing arm; 356. Fixed swing arm; 357. Protective sleeve; 358. Fixed rod; 359. Transmission drive rod; 3591. Spiral guide groove; 3592. Connecting block; 3593. Positioning and fixing ring; 36. Drive motor; 37. Rotating shaft; 38. Eccentric cam; 39. Water inlet pipe; 310. Drainage pipe; 4. Conveying mechanism; 5. Guide plate I; 6. Guide plate II; 7. Coarse screening assembly; 71. Rotating rod I; 72. Distributing rod; 73. Extension bracket; 74. Balance weight; 8. Buffer and shock absorption assembly; 81. Rotating rod II; 82. Buffer baffle; 83. Extension rod; 84. Shock absorber. Detailed Implementation

[0046] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0047] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual pictures. They should not be construed as limiting the invention. To better illustrate the embodiments of the invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0048] In the accompanying drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components. In the description of the present invention, it should be understood that if terms such as "upper," "lower," "left," "right," "front," and "rear" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting the present invention. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0049] Example 1

[0050] like Figures 1-7 As shown, a high-temperature slag screening device is mainly used for the grading and screening of high-temperature slag and the recovery of waste heat in the metallurgical industry. It has a compact structure and is easy to operate. It can effectively realize the integrated functions of large foreign object separation, fine slag screening, adhesion cleaning and waste heat recovery. It is suitable for the slag treatment needs discharged from different metallurgical furnaces, and its practicality is particularly prominent in the iron and steel and non-ferrous metal smelting scenarios.

[0051] Mounting bracket 1 is constructed from steel profiles with a suitable balance of strength and toughness. Before welding, all steel joints are beveled. Continuous welding is employed, and post-weld testing using penetrant testing ensures the absence of cracks, slag inclusions, and other defects. The weld surface is ground until flush with the base material. Anti-slip pads welded to the four bottom corners are made of wear-resistant steel. After welding and fixing the pads to the bracket, the bottom is milled to ensure flatness and prevent tilting due to uneven ground. The pre-drilled mounting holes on the pads have internal threads. During assembly, high-strength expansion bolts are used to secure the bracket to the concrete foundation. Locking nuts are used to secure the bolt heads, ensuring the device does not shift or shake under high-frequency vibration, providing a stable and reliable support foundation for the entire device. Simultaneously, the entire bracket is sandblasted to remove rust, then coated with two coats of anti-rust primer and one coat of high-temperature resistant topcoat to enhance corrosion resistance in the dusty and humid environment of a metallurgical workshop.

[0052] The top of the mounting bracket 1 is welded to the feed hopper 2, which is made of high-temperature resistant stainless steel. This material has excellent high-temperature strength and oxidation resistance, and can withstand the high-temperature erosion of molten slag for a long time without easily deforming. The wear-resistant coating sprayed on the inner wall of the hopper is made of ceramic matrix composite material, uniformly applied using a thermal spraying process. The coating thickness is uniform and the bonding strength with the hopper substrate is high, making it less likely to fall off under the impact and friction of molten slag. The hopper body is generally inverted conical in shape, and the inclination angle of the hopper wall ensures that the molten slag slides smoothly while avoiding impact problems caused by excessive sliding speed. The upper edge of the feed hopper 2 is rolled to prevent scratches to operators during handling and maintenance. A reinforcing flange is welded to the lower discharge port to enhance the structural strength of the discharge port and prevent cracking due to long-term impact from molten slag.

[0053] A coarse screening assembly 7 is installed above the discharge port of the feed hopper 2, serving as the first line of defense against large foreign objects. The rotating rod I 71 is made of heat-treated round steel, possessing excellent comprehensive mechanical properties. Both ends are rotatably connected to the side walls of the feed hopper 2 via high-temperature deep groove ball bearings. The outer ring of the bearing is fixed to the bearing housing with an interference fit. The bearing housing is bolted to a reinforcing plate on the outer wall of the feed hopper 2, and the reinforcing plate is welded to the hopper body to enhance the load-bearing capacity of the bearing mounting area. The bearing housing is filled with high-temperature long-life grease, and double-lip seals are fitted at both ends of the bearing. This reduces rotational friction resistance and effectively prevents high-temperature dust and slag particles from entering the bearing, avoiding bearing jamming and damage. Multiple distribution rods 72 are evenly welded axially along the outer wall of the rotating rod I 71. The distribution rods 72 are perpendicular to the rotating rod I 71, and the weld joints are reinforced with fillet welds. Post-weld stress relief treatment is performed, and the surface of the distribution rods 72 is quenched to improve surface hardness and wear resistance, extending service life.

[0054] A rectangular opening is provided on one side of the feed hopper 2, corresponding to the rotation trajectory of the distributing rod 72. A guide plate is welded to the edge of the opening to guide large foreign objects to slide out smoothly. A guide plate I5 is fixed to the mounting bracket 1 by bolts. The guide plate I5 is made of the same high-temperature resistant material as the feed hopper 2, and reinforcing ribs are welded to the back of the plate to prevent deformation under stress. The installation angle of the guide plate I5 has been adjusted so that the upper end is flush with the edge of the opening of the feed hopper 2 with a gap of 1-2mm to avoid mutual friction. The lower end extends to the top of the special collection frame on the outside of the device. The bottom of the collection frame is equipped with rollers for easy transfer after filling. Extension brackets 73 are welded to both ends of the rotating rod I71. The extension brackets are made of bent steel plate and are welded to the rotating rod I71 with double-sided welding. The ends of the two extension brackets 73 are fixed together with a balance counterweight 74 by bolts. The counterweight is made of cast iron and the surface is treated with anti-rust treatment. The installation position of the counterweight 74 is dynamically balanced and adjusted so that it can use its own weight to keep the rotating rod I 71 in the initial horizontal position of the distributing rod 72 when there is no external impact. When a large piece of molten slag falls and hits the distributing rod 72, the rotating rod I 71 rotates flexibly around the bearing, and the large foreign object slides out from the opening and falls into the collection frame along the guide plate I 5. After the impact force disappears, the counterweight 74 quickly drives the rotating rod I 71 to reset, realizing continuous screening of large foreign objects without the need for additional power drive, which is energy-saving and reliable.

[0055] A buffer and shock-absorbing assembly 8 is installed at the discharge port of the feed hopper 2 to slow down the falling speed of molten slag and protect the subsequent screening structure. The rotating rod II 81 is made of high-strength round steel, and its two ends are rotatably connected to the side walls of the feed hopper 2 through high-temperature bearings. The bearings are installed in a special bearing seat, which is fixed to the reinforcing plate below the discharge port. The installation position is precisely aligned with the center of the discharge port to ensure that the falling molten slag can accurately impact the buffer structure. An arc-shaped buffer baffle 82 is welded to the outer wall of the rotating rod II 81 along the circumferential direction. The buffer baffle 82 is made of high-temperature resistant stainless steel plate, and the plate is cold-bent. The curvature fits the falling trajectory of the molten slag. The convex surface of the buffer baffle 82 faces the discharge port to form a suitable buffer surface, which can fully bear the falling molten slag and transform the point contact impact into surface contact buffering.

[0056] Damper mounting seats are welded to both outer walls of the feed hopper 2. The mounting seats are made of thick steel plates and are firmly welded to the hopper body. The damper 84 is fixed to the mounting seat with bolts. The bolts are high-strength bolts and equipped with anti-loosening washers. The piston rod end of the damper 84 is designed as a hemispherical shape to reduce frictional wear with the contact parts. Extension rods 83 are welded to both ends of the rotating rod II 81, which are set perpendicular to the rotating rod II 81. The welding is reinforced. The end of the extension rod 83 is machined into a flat surface to closely contact the piston rod end of the damper 84. The contact surface is coated with high-temperature resistant grease to reduce wear. When the molten slag falls from the discharge port and impacts the buffer baffle 82, the buffer baffle 82 drives the rotating rod II 81 to rotate around the bearing, and the extension rod 83 simultaneously squeezes the piston rod of the shock absorber 84. The shock absorber 84 quickly absorbs the impact force of the molten slag through the damping effect of the internal hydraulic oil, which significantly reduces the falling speed of the molten slag and avoids the high-speed falling molten slag from causing a violent impact on the subsequent screening component 3. At the same time, the slowed molten slag can be more evenly distributed on the screening structure, improving the screening effect.

[0057] The bottom of the mounting bracket 1 is equipped with a conveying mechanism 4, which serves as the transfer carrier for the screened fine slag. The conveying mechanism 4 uses a high-temperature resistant conveyor belt. The base belt is made of high-strength polyester canvas, covered with a wear-resistant rubber layer. This rubber layer has excellent high-temperature resistance and wear resistance, capable of withstanding the temperature and long-term friction of the screened molten slag. Both the drive and driven rollers of the conveyor belt are made of seamless steel pipes. The roller surfaces are sandblasted to increase surface roughness, improve friction with the conveyor belt, and prevent slippage. One end of the drive roller is connected to the output shaft of the geared motor via a coupling. A flexible coupling is used to compensate for installation errors and buffer the impact during motor startup. The geared motor is fixed to the bottom of the mounting bracket 1 via a motor mount. The bottom of the motor mount is equipped with rubber shock-absorbing pads to reduce vibration transmission during motor operation. The conveyor belt speed can be flexibly adjusted via a frequency converter control cabinet, allowing for timely adjustments based on changes in the molten slag processing volume to ensure that fine slag does not accumulate on the conveyor belt.

[0058] Idler rollers are evenly installed along the length of the conveyor belt. These rollers are made of seamless steel pipe and equipped with waterproof bearings at both ends. The rollers are fixed to mounting bracket 1 by supports with adjustable height to ensure that the upper surfaces of all rollers are on the same plane, providing stable support for the conveyor belt and preventing it from sagging or deforming when carrying molten slag. Side guards are installed on both sides of the conveyor belt to prevent fine slag from scattering during transport. These side guards are integrally formed with the conveyor belt, and their height is adapted to the width of the conveyor belt and the height of the fine slag accumulation. After screening, the fine slag falls onto the conveyor belt and is smoothly transported to the collection hopper at the end. The top of the hopper is equipped with a dust cover to reduce dust diffusion, completing the molten slag transport process.

[0059] The screening component 3 is mounted on the mounting bracket 1, located between the feed hopper 2 and the conveying mechanism 4. It is the core component for achieving fine screening of molten slag, and its operational stability directly affects the overall screening effect. The fixed frame 34 is made of welded steel sections. The uprights and beams of the frame are all made of high-strength steel sections. The connection nodes adopt a double fixing method of welding and bolt fastening to ensure that the frame structure is stable and can withstand the loads caused by vibration and molten slag impact. Spring seats II 33 are welded to the four corners of the fixed frame 34. The spring seats II 33 are groove structures formed by stamping steel plates, with positioning steps machined inside, for fixing the upper end of the support spring 32.

[0060] Four spring seats I 31 are welded to the four corners of the top of the mounting bracket 1. The structure of spring seat I 31 is compatible with that of spring seat II 33, and both have internal positioning steps. The support spring 32 is a high-temperature resistant cylindrical helical spring. The spring wire is made of high-strength spring steel and the surface is galvanized for rust prevention. The lower end of the support spring 32 is embedded in the positioning step of spring seat I 31, and the upper end mates with the positioning step of spring seat II 33. It is fixed by welding or clamps to prevent the spring from falling off during vibration. The elastic connection allows the fixed frame 34 to form a stable up-and-down movement trajectory during vibration. At the same time, the support spring 32 can effectively absorb vibration energy, reduce the transmission of vibration to the mounting bracket 1 and the ground, and reduce the noise during equipment operation.

[0061] A motor mounting base is bolted to the top of the fixed frame 34. The mounting base, made of thick steel plate, fits snugly against the crossbeam of the fixed frame 34. High-strength bolts are used and symmetrically arranged to ensure a secure installation. The drive motor 36 is firmly mounted on the mounting base, with its output shaft facing outwards from the fixed frame 34. The motor's junction box is waterproof and dustproof, suitable for the harsh environment of a metallurgical workshop. Multiple sets of rubber shock-absorbing pads are provided at the bottom of the motor mounting base to effectively absorb the vibrations generated by the drive motor 36 during operation, preventing interference between motor vibration and screening vibration.

[0062] A synchronous pulley is mounted on the output shaft of the drive motor 36 via a key connection. The fit clearance between the key and the keyway is precision machined to ensure reliable power transmission. Rotating shafts 37 are fixed to the two side walls of the fixed frame 34 via bearing seats. The rotating shafts are made of tempered alloy round steel, possessing good torsional strength and wear resistance. Split bearing seats are used for easy installation and maintenance, and are internally fitted with deep groove ball bearings lubricated with long-life grease. Eccentric cams 38 are fixedly mounted on both ends of the rotating shaft 37 via keys. The eccentric cams 38 are made of high-strength steel, with a quenched and chrome-plated surface to improve hardness and wear resistance. The eccentric directions of the eccentric cams 38 are consistent, ensuring that a driving force is generated in the same direction during rotation.

[0063] One end of the rotating shaft 37 is also keyed with a synchronous pulley, which is identical in specifications to the synchronous pulley on the output shaft of the drive motor 36. The two synchronous pulleys are connected by a synchronous belt made of polyurethane with teeth on its inner surface, which precisely meshes with the teeth of the synchronous pulley, resulting in high transmission efficiency and no slippage. After the drive motor 36 starts, it drives the rotating shaft 37 and the eccentric cam 38 to rotate synchronously via the synchronous belt. During rotation, the eccentric cam 38 drives the fixed frame 34 to sway through centrifugal force. The support spring 32 expands and contracts synchronously with the vibration of the fixed frame 34, forming a stable elastic vibration system.

[0064] A guide plate II6 is welded to the bottom of the fixed frame 34. The guide plate II6 is made of high-temperature resistant stainless steel with a smooth surface to reduce resistance when fine slag slides down. The upper end of the guide plate II6 is flush with the bottom of the screening frame 35, and the connection is rounded to avoid steps that could cause fine slag to accumulate. The lower end extends outward from the conveying mechanism 4 and maintains an appropriate distance from the conveyor belt surface to ensure that the filtered molten slag does not fall into the conveyor belt. Reinforcing ribs are welded to the back of the guide plate II6 to enhance the structural strength of the plate and prevent deformation due to long-term impact from fine slag.

[0065] The screening frame 35 is bolted to the inside of the fixed frame 34 and vibrates synchronously with the fixed frame 34. Its internal structure determines the screening accuracy. The connecting frame 351 is a rectangular frame structure welded from high-temperature resistant stainless steel. The size of the frame is adapted to the internal space of the fixed frame 34. It is tightly fixed to the inner wall of the fixed frame 34 by multiple bolts. The bolts are evenly distributed along the perimeter of the frame to ensure that no relative displacement occurs during vibration. Multiple grids I 352 are fixed parallel to each other along the length of the connecting frame 351. The grids I 352 are made of hollow square steel with a trapezoidal cross section, with the smaller end facing upwards. The spacing is determined according to the screening accuracy requirements. The two ends of the grids I 352 are welded to the crossbeams of the connecting frame 351. The welds are full welds to ensure a firm connection.

[0066] Multiple grids II 353 are fixed along the width direction between two adjacent grids I 352 and between the inner wall of grid I 352 and the connecting frame 351. The material of grids II 353 is the same as that of grids I 352, and they are arranged perpendicularly to grids I 352 to form a mesh screen surface. The intersections of grids II 353 and grids I 352 are fixed by welding, and the surface is ground smooth after welding to avoid protrusions that may obstruct the flow of molten slag. This not only strengthens the support and improves the overall structural strength of the screening frame 35 to prevent deformation during vibration, but also forms uniform screen holes to ensure that molten slag in different locations receives a consistent screening effect.

[0067] The connecting frame 351 has an inlet pipe 39 and a drain pipe 310 welded to both ends. These pipes are made of high-temperature resistant stainless steel, with diameters adapted to the flow requirements of the cooling medium. One end of each pipe connects to the internal channel of the grid I 352. When the grid I 352 has a hollow structure, the connection between the pipe and the grid I 352 must be sealed to prevent cooling medium leakage. The weld between the pipe and the connecting frame 351 is a bevel weld, followed by a hydrostatic test to ensure no leakage. The other end of the pipe extends to the outside of the fixed frame 34 and connects to the external cooling circulation system and heat exchanger via a flange, forming a complete heat exchange loop. During the screening process, the cooling medium is continuously introduced into the internal channel of the grid I 352 through the inlet pipe 39. As it flows through the grid I 352, it fully absorbs the high-temperature heat transferred by the molten slag, effectively cooling the grid I 352 and preventing deformation due to prolonged exposure to high temperatures. This ensures stable sieve aperture size and guarantees screening accuracy. After absorbing heat, the cooling medium is discharged from the drain pipe 310 and enters the external heat exchanger. Through the heat exchange structure, the heat is transferred to the workshop heating water or other media that need to be heated, realizing the recovery and utilization of waste heat and meeting energy-saving requirements.

[0068] The cleaning assembly installed within the screening frame 35 is a key structure for solving the problem of high-temperature viscous slag adhesion and clogging of the screen holes, ensuring long-term stable screening efficiency. Multiple rotating sleeves 354 are installed along the length of the grid I 352. The rotating sleeves 354 are made of high-temperature resistant stainless steel, with a diameter adapted to the spacing of the grid I 352. Both ends are rotatably connected to the grid I 352 and the connecting frame 351 via sliding bearings. The bearings are filled with high-temperature grease to ensure flexible rotation. A small gap is maintained between the outer wall of the rotating sleeve 354 and the surface of the grid I 352 to avoid mutual friction and wear.

[0069] Each of two adjacent rotating sleeves 354 has a synchronous pulley installed at one end via a key connection. The synchronous pulleys are of the same specification and are connected by a synchronous belt drive to form a linkage structure. One end of one of the rotating sleeves 354 located at the end is connected to the output end of the drive motor 36 via a synchronous belt and synchronous pulley, so that the drive motor 36 can drive all rotating sleeves 354 to rotate synchronously at the same time, eliminating the need for an additional drive mechanism, simplifying the structure and reducing energy consumption. Multiple fixed swing rods 356 are evenly welded to the outer wall of the rotating sleeve 354 along the axial and circumferential directions. The fixed swing rods 356 are made of stainless steel with good elasticity. One end is welded and fixed to the rotating sleeve 354, and the other end extends naturally to the surface of the grid I 352, closely fitting one side of the grid I 352. The fitting force is adjusted by the elasticity of the swing rod, which can ensure the cleaning effect without excessively abrading the grid surface. When the rotating sleeve 354 rotates, the fixed swing rod 356 rotates synchronously with it, generating friction and scraping with the surface of the grid I 352, completely peeling off the slag adhering to the surface of the grid I 352. The peeled slag falls into the conveyor belt during the screening process.

[0070] A transmission drive rod 359 is internally installed in the rotating sleeve 354. The transmission drive rod 359 is made of high-strength round steel with a precision-ground surface to improve surface smoothness and reduce frictional resistance with the rotating sleeve 354. Multiple sets of oblong holes 3541 are axially formed on the outer wall of the rotating sleeve 354. The length of the oblong holes 3541 is adapted to the axial movement distance of the transmission drive rod 359, and the width is adapted to the size of the connecting block 3592. The connecting block 3592 is a rectangular steel block. One end is fixed to the outer wall of the transmission drive rod 359 by welding or bolting, and the other end passes through the oblong holes 3541 and can slide freely within the holes. This allows the axial movement of the transmission drive rod 359 to synchronously drive the rotating sleeve 354 axially, without affecting the rotational movement of the rotating sleeve 354 itself.

[0071] The movable swing arm 355 is sleeved on the outer wall of the rotating sleeve 354, located between two adjacent fixed swing arms 356. The structure of the movable swing arm 355 is similar to that of the fixed swing arms 356. It is made of stainless steel sheet. One end is fixed to the rotating sleeve 354 by a positioning sleeve and welded to two corresponding connecting blocks 3592. The other end is tightly fitted to the other side of the grid I 352. When the transmission drive rod 359 moves axially back and forth, it drives the rotating sleeve 354 to move synchronously along the axial direction through the connecting blocks 3592. The movable swing arm 355 then generates reciprocating friction on the other side of the grid I 352. At the same time, it can clean the side wall of the grid II 353 through its end, realizing a comprehensive cleaning of both sides of the grid I 352 and the grid gaps, completely avoiding the screen holes from being blocked by molten slag, and ensuring stable screening efficiency.

[0072] One end of the drive rod 359 penetrates the side wall of the fixed frame 34, and a sealing sleeve is provided at the penetration point. The sealing sleeve is made of high-temperature resistant and wear-resistant material to prevent dust and slag particles from entering the interior of the fixed frame 34. A fixing rod 358 is welded to the outside of the fixed frame 34. The fixing rod 358 is made of rectangular steel plate and is connected to the fixed frame 34 by reinforcing ribs to improve the load-bearing capacity. A positioning and fixing ring 3593 is fixed to one side of the fixing rod 358 by bolts. The inner hole of the positioning and fixing ring 3593 is adapted to the outer diameter of the drive rod 359, and a slider is fixed to the inner wall by a slot. The slider is made of engineering plastic or copper alloy with excellent wear resistance and coated with solid lubricant.

[0073] A spiral guide groove 3591 is formed on the outer wall of one end of the transmission drive rod 359 along the axial direction. The pitch and lead of the spiral guide groove 3591 are precisely designed. The protruding part of the slider is embedded in the spiral guide groove 3591 and can slide freely to form a spiral transmission mechanism. When the rotating sleeve 354 rotates, the transmission drive rod 359 is driven to rotate synchronously through the connecting block 3592 and the waist-shaped hole 3541. Since the positioning and fixing ring 3593 is stationary, the transmission drive rod 359 generates an axial component force through the spiral guide groove 3591 and the slider during rotation, which pushes the transmission drive rod 359 to move back and forth along the axial direction. The reciprocating motion of the transmission drive rod 359 is realized by using the power of the existing drive motor 36, without the need for an additional power source, which simplifies the equipment structure.

[0074] A protective sleeve 357, made of stainless steel tubing, is fitted onto one end of the drive rod 359. One end of the sleeve is fixed to one side of the fixing rod 358 via a flange, completely enclosing the positioning and fixing ring 3593, the slider, and the end of the drive rod 359. The other end of the protective sleeve 357 has an end cap, and a lip seal is installed between the end cap and the drive rod 359. This seal prevents the splashing of high-temperature molten slag and the intrusion of dust, protecting the internal transmission components from damage, and also avoids the impact of high-temperature radiation on component performance, extending the service life of the transmission structure. The protective sleeve 357 has an inspection hole on its side wall, equipped with a removable cover plate, facilitating daily inspection and maintenance of the internal components.

[0075] In practical use, after the high-temperature molten slag is discharged from the metallurgical furnace, it is poured into the feed hopper 2 through a special chute or conveying equipment. The molten slag slides down the inclined hopper wall of the feed hopper 2 naturally under the action of gravity. During the slide, it gradually accelerates and first contacts the material distribution rod 72 of the coarse screening component 7.

[0076] Larger foreign objects, such as incompletely melted furnace charge and refractory material fragments, collide with the distribution rod 72 during their descent. The resulting impact force overcomes the gravity of the counterweight 74, causing the rotating rod I 71 to rotate flexibly around the bearings at both ends. The distribution rod 72 rotates along with the rotating rod I 71, guiding the large foreign objects towards the opening on one side of the feed hopper 2. Under the influence of gravity, the large foreign objects slide out from the opening and fall along the inclined surface of the guide plate I 5 into the dedicated collection frame below. When the impact force disappears, the counterweight 74, under its own gravity, quickly drives the rotating rod I 71 and the distribution rod 72 to reset to their initial horizontal position, ready to receive the next batch of large foreign objects for screening. The entire coarse screening process is continuous and requires no manual operation, ensuring that the subsequent screening structure is not blocked or damaged by large foreign objects.

[0077] After the coarse screening removes large foreign objects, the molten slag continues to slide down the wall of the feed hopper 2, reaching the buffer baffle 82 of the buffer and shock absorption assembly 8 and colliding with it. Under the impact force, the buffer baffle 82 rotates around the rotating rod II 81, and the extension rods 83 at both ends of the rotating rod II 81 swing outward synchronously, squeezing the piston rod of the shock absorber 84. The piston rod retracts inward, and the hydraulic oil inside the shock absorber 84 generates damping force through the throttling orifice, quickly absorbing the impact force of the molten slag and significantly reducing the falling speed of the molten slag. This allows the molten slag to be distributed more evenly to the screening assembly 3 below, avoiding the molten slag from accumulating in a local area of ​​the screening frame 35 and improving the screening uniformity. After the molten slag passes through, the return spring of the shock absorber 84 pushes the piston rod to extend, causing the extension rod 83 and the rotating rod II 81 to return to their original positions, and the buffer baffle 82 returns to its initial position, waiting for the impact and buffering of the next batch of molten slag.

[0078] The decelerated molten slag falls smoothly onto the grid structure of the screening frame 35. At this time, the drive motor 36 is started through the control cabinet. The motor output shaft drives the synchronous pulley to rotate, and the power is transmitted to the rotating shaft 37 through the synchronous belt. The rotating shaft 37 drives the eccentric cams 38 at both ends to rotate synchronously. During the rotation of the eccentric cams 38, the centrifugal force of the eccentric part drives the fixed frame 34 to shake. The fixed frame 34 drives the internal screening frame 35 to vibrate synchronously. Under the action of vibration, the molten slag continuously rolls and jumps on the screen surface formed by grid I 352 and grid II 353. Fine slag with a particle size smaller than the screen hole size passes smoothly through the screen hole and falls onto the conveyor belt of the conveying mechanism 4; coarse slag with a particle size larger than the screen hole size remains on the screen surface and moves towards the end of the screening frame 35 with vibration. It falls into the special coarse slag collection device through the guide plate II 6, realizing the fine classification and screening of molten slag.

[0079] During the screening process, the cleaning component works synchronously with the screening structure to ensure that the screen holes are not blocked by high-temperature viscous molten slag. The drive motor 36 drives the end rotating sleeve 354 of the cleaning component to rotate via another set of synchronous belts. The rotating sleeve 354 drives the adjacent rotating sleeves 354 to rotate synchronously via the synchronous belts, so that all rotating sleeves 354 rotate in the same direction and at the same speed. The fixed swing rod 356 on the outer wall of the rotating sleeve 354 rotates synchronously with the sleeve, and closely rubs and scrapes against one side surface of the grid I 352, completely peeling off the molten slag adhering to the grid surface. The peeled molten slag particles move together with the molten slag on the screen surface. Those that meet the size requirements fall into the conveyor belt, and those that do not fall into the coarse slag collection device.

[0080] Simultaneously, the rotating sleeve 354 drives the transmission drive rod 359 to rotate synchronously during rotation. The spiral guide groove 3591 on the outer wall of the transmission drive rod 359 cooperates with the slider inside the positioning and fixing ring 3593 to generate an axial reciprocating driving force, causing the transmission drive rod 359 to reciprocate along its own axis. The transmission drive rod 359 drives the rotating sleeve 354 to move synchronously along the axis through the connecting block 3592. The fixed swing rod 356 moves together with it, peeling and cleaning the slag on the other side of the grid, realizing a comprehensive cleaning of both sides of grid I 352 and grid II 353. This completely solves the problem of high-temperature viscous slag sticking to the screen holes, ensuring long-term stable screening efficiency, avoiding downtime for cleaning due to screen hole blockage, and increasing the continuous operation time of the equipment.

[0081] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A high-temperature molten slag screening device, characterized in that, include: Mounting bracket (1); The feed hopper (2) is fixed to the top of the mounting bracket (1). A coarse screening component (7) is provided above the discharge port of the feed hopper (2), and a buffer and shock absorption component (8) is provided at the discharge port. The conveying mechanism (4) is located at the bottom of the mounting bracket (1); The screening component (3) is mounted on the mounting bracket (1) and located between the feed hopper (2) and the conveying mechanism (4). It includes a fixed frame (34) movably mounted on the mounting bracket (1), a screening frame (35) is fixed inside the fixed frame (34), a drive motor (36) is fixed on the top, and a rotating shaft (37) is rotatably mounted inside. Eccentric cams (38), two sets of eccentric cams (38) are respectively fixed to both ends of the rotating shaft (37) by key connection, and the rotating shaft (37) is connected to the output end of the drive motor (36) by synchronous pulley and synchronous belt transmission; A cleaning component is located within the screening frame (35); In this process, after the high-temperature molten slag falls into the feed hopper (2), it is separated into large foreign objects by the coarse screening component (7), the buffer and shock absorption component (8) reduces the impact of the molten slag, the drive motor (36) drives the eccentric cam (38) to rotate and make the fixed frame (34) vibrate, the screening frame (35) completes the molten slag classification, and the cleaning component simultaneously removes the molten slag adhering to the screen holes.

2. The high-temperature slag screening device according to claim 1, characterized in that, The coarse screening assembly (7) includes a rotating rod I (71) mounted on the side wall of the feed hopper (2) via a bearing. Multiple material distribution rods (72) are fixed to the outer wall of the rotating rod I (71) by welding. A discharge opening is provided on one side of the feed hopper (2). A guide plate I (5) corresponding to the opening is fixed on the mounting bracket (1). Extension brackets (73) are welded to both ends of the rotating rod I (71). A balance weight (74) is fixed to the ends of the two extension brackets (73). When a large piece of molten slag impacts the material distribution rod (72), the rotating rod I (71) rotates to discharge the foreign object through the guide plate I (5). After the impact force disappears, the balance weight (74) drives the material distribution rod (72) to reset.

3. The high-temperature slag screening device according to claim 1, characterized in that, The buffer and shock absorption assembly (8) includes a rotating rod II (81) rotatably mounted on the side wall of the feed hopper (2) via a bearing. An arc-shaped buffer baffle (82) is welded to the outer wall of the rotating rod II (81). Shock absorbers (84) are fixed on both sides of the feed hopper (2). Extension rods (83) are welded to both ends of the rotating rod II (81). The end of the extension rod (83) abuts against the piston rod of the shock absorber (84). When the molten slag impacts the buffer baffle (82), the extension rod (83) squeezes the piston rod, the shock absorber (84) absorbs the impact energy, and after the molten slag passes through, the piston rod pushes the structure to reset.

4. The high-temperature slag screening device according to any one of claims 1 to 3, characterized in that, The mounting bracket (1) has four spring seats I (31) fixed on top. Each spring seat I (31) has a support spring (32) fixed inside. The top of the support spring (32) has a spring seat II (33) fixed on top. The four spring seats II (33) are symmetrically welded to both sides of the fixed frame (34). When the fixed frame (34) vibrates, the support spring (32) stretches and contracts to buffer the vibration and reduce the transmission of vibration to the mounting bracket (1).

5. The high-temperature slag screening device according to claim 4, characterized in that, The screening frame (35) includes a connecting frame (351) welded to the fixed frame (34). Multiple parallel grids I (352) are welded in the connecting frame (351). Grids II (353) are welded between adjacent grids I (352) and between grids I (352) and the connecting frame (351). Water inlet pipe (39) and drainage pipe (310) are welded to both ends of the connecting frame (351).

6. The high-temperature slag screening device according to claim 5, characterized in that, The cleaning assembly includes multiple rotating sleeves (354), which are rotatably mounted on the grid I (352) and the connecting frame (351) through bearings. Adjacent rotating sleeves (354) are connected by synchronous pulleys and synchronous belts. One of the rotating sleeves (354) is connected to the output end of the drive motor (36) by synchronous belt. The outer wall of the rotating sleeve (354) is welded with a plurality of fixed swing rods (356). One side of the fixed swing rods (356) is in contact with the grid I (352). The rotating sleeve (354) drives the fixed swing rods (356) to rotate and scrape the adhesive slag on the surface of the grid I (352).

7. The high-temperature slag screening device according to claim 6, characterized in that, A transmission drive rod (359) is provided inside the rotating sleeve (354). Multiple sets of waist-shaped holes (3541) are opened on the outer wall of the rotating sleeve (354). A connecting block (3592) is slidably assembled in the waist-shaped hole (3541). One end of the connecting block (3592) is welded to the outer wall of the transmission drive rod (359). Multiple movable swing rods (355) are sleeved on the outer wall of the rotating sleeve (354). The movable swing rods (355) are located between adjacent fixed swing rods (356) and are fixedly connected to the outer end of the connecting block (3592). The transmission drive rod (359) drives the movable swing rods (355) to move axially to clean the other side of the grid I (352) and one side of the grid II (353).

8. The high-temperature slag screening device according to claim 7, characterized in that, One end of the transmission drive rod (359) passes through the fixed frame (34). A fixed rod (358) is welded to the outside of the fixed frame (34). A positioning and fixing ring (3593) is sleeved on the outer wall of the transmission drive rod (359). The positioning and fixing ring (3593) is fixed to one side of the fixed rod (358). A spiral guide groove (3591) is opened on the outer wall of one end of the transmission drive rod (359). The slider in the positioning and fixing ring (3593) is slidably assembled in the spiral guide groove (3591). When the transmission drive rod (359) rotates, it is converted into axial reciprocating motion through the spiral guide groove (3591).

9. The high-temperature slag screening device according to claim 8, characterized in that, The transmission drive rod (359) is fitted with a protective sleeve (357) at one end, and the protective sleeve (357) is fixed to one side of the fixed rod (358) by a flange; the protective sleeve (357) is provided with an end cap with a lip seal ring at one end, which is used to block molten slag splash and dust intrusion, and protect the internal transmission structure.

10. The high-temperature slag screening device according to claim 9, characterized in that, The conveying mechanism (4) includes a geared motor, a drive roller, a driven roller and a high-temperature resistant conveyor belt fixed to the bottom of the mounting bracket (1). The drive roller and the geared motor are connected by a flexible coupling. The drive roller and the driven roller are tensioned together by a conveyor belt. The conveyor belt is uniformly provided with idler rollers below it and has integrally formed side guards on both sides. The screened fine slag is smoothly conveyed to the collection bin by the conveyor belt.

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