A method and device for crushing and leveling high-temperature steel slag

Abstract

The present invention provides a method and device for crushing and flattening high-temperature steel slag, the method comprising: step S1. steel slag loading, a certain high-temperature steel slag is poured onto a slag bed by an overhead crane to form a liquid slag layer or a solid or semi-solid slag pile, the travel motor is started, and a breaker moves with the travel wheels along the track to the high-temperature steel slag layer or slag pile; step S2. steel slag crushing and flattening, a slag breaker of the breaker stirs and crushes the steel slag to a certain particle size, and a flattener of the breaker flattens the crushed steel slag according to a certain thickness; step S3. steel slag unloading, after the flattened steel slag is cooled, a breaker is used to push and unload the cooled steel slag. The method and device of the present invention have good steel slag crushing and flattening effects, a high level of equipment automation, and stable equipment operation.

Description

Technical Field

[0001] The invention relates to the field of metallurgical technology, and specifically to a method and device for crushing and leveling high-temperature steel slag generated in the production process of a steel enterprise. Background Art

[0002] The efficient recovery of metallic iron and inorganic material resources in steel slag must first be crushed and separated, and then the two types of materials must be separated by magnetic separation and other methods, so as to obtain targeted resource utilization. The pretreatment process of steel slag is a prerequisite for the crushing and magnetic separation of steel slag. Pretreatment under high temperature conditions can achieve more efficient crushing, screening and magnetic separation of steel slag. After cooling, steel slag has the characteristics of high hardness and good wear resistance. Therefore, crushing steel slag at room temperature has problems such as low crushing efficiency and high production energy consumption. Crushing steel slag under high temperature is conducive to reducing the energy consumption and other costs of steel slag processing under normal temperature conditions.

[0003] In the prior art, the pretreatment processes for steel slag include hot stuffing, hot pouring, drum method, wind crushing and other production processes. The traditional hot stuffing and hot pouring methods use excavators to crush the steel slag; the drum method uses steel balls to squeeze and crush the steel slag that has been rapidly cooled by water; the wind crushing method uses high-pressure compressed air to crush the steel slag with good fluidity, but the iron loss is serious, which is not conducive to the maximum recycling of steel slag resources. In recent years, the pressurized hot stuffing process that has been promoted and applied has developed a roller crusher to crush high-temperature steel slag, but the equipment only has a crushing function. In summary, the crushing ideas in previous processes are simple crushing methods, which cannot provide good physical conditions for the efficient cooling of high-temperature steel slag.

[0004] In addition, the use of air cooling technology is a reliable method to effectively recover the waste heat of high-temperature steel slag. However, efficient air cooling of high-temperature steel slag first requires that the high-temperature steel slag be crushed into block particles and form a material layer with a relatively uniform thickness, thereby providing good physical conditions for the air cooling and heat exchange of the high-temperature steel slag. However, the existing high-temperature steel slag treatment lacks a dedicated crushing and flattening device. Summary of the invention

[0005] In order to solve the problem of existing high-temperature steel slag crushing and flattening, the present invention provides a high-temperature steel slag crushing and flattening method and device, which has the advantages of high equipment automation level, stable equipment operation, and good steel slag crushing and flattening effect.

[0006] The above objectives are achieved through the following solutions:

[0007] A method for crushing and leveling high-temperature steel slag, the method comprising:

[0008] Step S1. Steel slag is loaded. A certain high-temperature steel slag is poured onto a slag bed by an overhead crane to form a liquid slag layer or a solid or semi-solid slag pile. The travel motor is started, and the breaker moves along the track with the travel wheels to the high-temperature steel slag layer or slag pile.

[0009] Step S2. crushing and flattening the slag, wherein the slag crusher of the flattening machine stirs and crushes the slag to a certain particle size, and the flattening machine of the flattening machine flattens the crushed slag according to a certain thickness;

[0010] Step S3. slag unloading: after the flattened slag is cooled, a slag breaker is used to push and unload the cooled slag.

[0011] Furthermore, in step S2, stirring and crushing the steel slag further includes starting a rotating motor on the side of the slag breaker on which the steel slag is fed, driving the slag breaking shaft of the slag breaker to rotate, thereby driving the slag breaking teeth to rotate at a certain speed to stir and crush the steel slag until the steel slag is cooled, solidified and crushed to a certain particle size.

[0012] Furthermore, in step S2, flattening the crushed steel slag further includes setting a flattening machine adjacent to a slag crusher on one side of the steel slag discharge, starting a travel motor to drive the flattening machine to move after the steel slag is crushed, and the flattening machine flattens the crushed steel slag on the slag bed according to a certain thickness, and the flattened steel slag is subjected to the next step of cooling.

[0013] Furthermore, in step S2, a rotary motor is used to drive the flattening shaft on the flattening machine to rotate, thereby driving the flattening plate to rotate at different angles, so as to adjust the lowest position of the flattening plate and the distance between the slag and the flattening thickness to meet the flattening thickness requirements.

[0014] Furthermore, in step S3, after the flattened slag is cooled, a slag breaker is used to move along the track in the opposite direction of the high-temperature slag, and the slag breaker and the flattener are used to push and unload the cooled slag.

[0015] Furthermore, the temperature of the high-temperature steel slag poured onto the slag bed is 1100-1700°C, the crushing and stirring time of the slag crusher for the high-temperature steel slag is 5-30 minutes, the rotation speed of the slag crushing teeth is 3-30 rpm, the average particle size of the steel slag after crushing by the slag crusher is 10-40mm, the average thickness of the steel slag after flattening by the flattening plate on the slag bed is 200-1200mm, and the rotation speed of the flattening plate is 1-10 rpm.

[0016] The present invention also provides a high-temperature steel slag crushing and flattening device, which is used for the above-mentioned high-temperature steel slag crushing and flattening method. The device includes a slag bed, a flattening machine, a machine base, a connecting beam, a cooling water pipe, and a rotating joint. There are two machine bases, which are axially symmetrically arranged on both sides of the slag bed and fixedly connected by the connecting beam. The rotating mechanism is arranged on the upper side of the machine base, and the walking mechanism is arranged on the lower side of the machine base. The cooling water pipe is connected to the rotating mechanism through a rotating joint. The flattening machine is arranged between the two machine bases through the rotating mechanism, and the slag bed is arranged below the flattening machine. The flattening machine includes a flattening machine and a slag breaker.

[0017] Furthermore, the slag breaking teeth are connected to the machine base through a rotating mechanism to form a flattening machine, and the flattening plate is connected to the machine base through a rotating mechanism to form a slag breaking machine. The slag breaking machine is on the slag incoming side, and the flattening machine is arranged adjacent to the slag breaking machine on the slag discharging side.

[0018] Furthermore, the rotating mechanism includes a flattening shaft, a bearing, a bearing seat, a rotary reducer, and a rotary motor. The flattening machine and the slag breaker are connected to the machine base via the flattening shaft. The cooling water pipe is connected to the flattening shaft via a rotary joint. The flattening shaft is connected to the bearing. The bearing is above the bearing seat. The bearing, rotary reducer, and rotary motor are connected above the machine base.

[0019] Furthermore, the walking mechanism includes walking wheels, a walking reducer, a walking motor, and a track. The walking wheels are below the machine base and above the track. The walking reducer and the walking motor are fixed on the lower side of the machine base and are connected in sequence.

[0020] Beneficial effects of the present invention:

[0021] The present invention utilizes a breaker to automatically crush and flatten steel slag. The slag breaker of the breaker stirs and crushes the steel slag to a certain particle size. The flattener of the breaker flattens the crushed steel slag according to a certain thickness. The present invention has the technical effects of high automation, high processing efficiency, small space occupation and convenient production operation.

[0022] The slag breaker of the breaker of the present invention is located on the side of the steel slag incoming material, and the slag breaking teeth can rotate at different speeds to stir and crush the steel slag to obtain cooled and solidified steel slag of different particle sizes; at the same time, the leveling machine of the breaker adopts a rotating motor to drive the leveling shaft on the leveling machine to rotate, thereby driving the leveling plate to rotate at different angles, so as to adjust the lowest position of the leveling plate and the distance between the steel slag to meet the leveling thickness requirements.

[0023] The present invention can crush high-temperature steel slag into block particles and form a material layer with relatively uniform thickness, thereby providing good physical conditions for air-cooling heat exchange and waste heat recovery of high-temperature steel slag, and providing an effective way for efficient air cooling of steel slag, thereby significantly improving the comprehensive utilization effect of steel slag. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0025] Figure 1 A flow chart of a method for crushing and leveling high-temperature steel slag provided by the present invention;

[0026] Figure 2 A schematic diagram of a high-temperature slag crushing and flattening device provided by the present invention Figure 1 ;

[0027] Figure 3 A schematic diagram of a high-temperature slag crushing and flattening device provided by the present invention Figure 2 ;

[0028] Figure 4 A schematic diagram of a high-temperature slag crushing and flattening device provided by the present invention Figure 3 .

[0029] Description of reference numerals:

[0030] Steel slag 1, slag bed 2, leveler 3, leveler 4, slag breaker 5, slag breaking teeth 6, leveler plate 7, leveler shaft 8, bearing 9, bearing seat 10, rotary reducer 11, rotary motor 12, machine base 13, connecting beam 14, travel wheel 15, travel reducer 16, travel motor 17, track 18, cooling water pipe 19, rotary joint 20. DETAILED DESCRIPTION

[0031] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0032] See also Figure 1-4 The present invention provides a method for crushing and leveling high-temperature steel slag, the method comprising the following steps:

[0033] Step S1. Steel slag is loaded. A certain high-temperature steel slag 1 is poured onto the slag bed 2 by an overhead crane to form a liquid slag layer or a solid or semi-solid slag pile. The travel motor 17 is started, and the breaker 3 moves with the travel wheel 15 along the track 18 to the high-temperature steel slag 1 slag layer or slag pile;

[0034] Step S2. The slag is crushed and flattened. The slag crusher 5 of the flattening machine 3 stirs and crushes the slag 1 to a certain particle size, and the flattening machine 4 of the flattening machine 3 flattens the crushed slag 1 according to a certain thickness;

[0035] Step S3. slag unloading: after the flattened slag 1 is cooled, a breaker 3 is used to push and unload the cooled slag.

[0036] Among them, in step S2, the stirring and crushing of the steel slag 1 further includes: the slag crusher 5 is on the incoming side of the steel slag 1, and the rotating motor 12 is started to drive the flattening shaft 8 of the slag crusher 5 to rotate, thereby driving the slag breaking teeth 6 to rotate at a certain speed to stir and crush the steel slag 1 until the steel slag 1 is cooled, solidified and crushed to a certain particle size.

[0037] Among them, in step S2, flattening the crushed steel slag 1 further includes: a flattening machine 4 is set adjacent to the slag crusher 5 on the discharge side of the steel slag 1. After the steel slag 1 is crushed, the travel motor 17 is started to drive the flattening machine 3 to move. The flattening machine 4 flattens the crushed steel slag 1 on the slag bed 2 according to a certain thickness, and the flattened steel slag 1 is cooled in the next step.

[0038] Among them, in step S2, the rotating motor 12 is used to drive the flattening shaft 8 on the flattening machine 4 to rotate, thereby driving the flattening plate 7 to rotate at different angles, so as to adjust the lowest position of the flattening plate 7 and the slag spacing to meet the flattening thickness requirements.

[0039] Among them, in step S3, after the flattened steel slag 1 is cooled, the breaker 3 is used to move along the track 18 in the opposite direction of the incoming high-temperature steel slag 1, and the slag breaker 5 and the flattener 4 are used to push and unload the cooled steel slag.

[0040] Among them, the temperature of the high-temperature steel slag 1 poured on the slag bed 2 is 1100-1700℃, the crushing and stirring time of the slag crusher 5 for the high-temperature steel slag 1 is 5-30 minutes, the rotation speed of the slag crushing teeth 6 is 3-30 rpm, the average particle size of the steel slag 1 crushed by the slag crusher 5 is 10-40mm, the average thickness of the steel slag 1 after flattening by the flattening plate 7 on the slag bed 2 is 200-1200mm, and the rotation speed of the flattening plate 7 is 1-10 rpm.

[0041] The present invention also provides a high-temperature steel slag crushing and flattening device, which includes a slag bed 2, a breaker 3, a machine base 13, a connecting beam 14, a cooling water pipe 19, and a rotating joint 20. There are two machine bases 13, and the two machine bases 13 are axially symmetrically arranged on both sides of the slag bed 2 and fixedly connected by the connecting beam 14. The rotating mechanism is arranged on the upper side of the machine base 13, and the walking mechanism is arranged on the lower side of the machine base 13. The cooling water pipe 19 is connected to the rotating mechanism through the rotating joint 20. The breaker 3 is arranged between the two machine bases 13 through the rotating mechanism, and the slag bed 2 is arranged below the breaker 3. The breaker 3 includes a flattening machine 4 and a slag breaker 5.

[0042] Among them, the slag breaking teeth 6 are connected to the machine base 13 through a rotating mechanism to form a flattening machine 4, and the flattening plate 7 is connected to the machine base 13 through a rotating mechanism to form a slag breaking machine 5. The slag breaking machine 5 is on the incoming side of the slag 1, and the flattening machine 4 is arranged adjacent to the slag breaking machine 5 on the discharging side of the slag 1.

[0043] Among them, the rotating mechanism includes a flattening shaft 8, a bearing 9, a bearing seat 10, a rotary reducer 11, and a rotary motor 12. The flattening machine 4 and the slag breaker 5 are connected to the machine base 13 through the flattening shaft 8. The cooling water pipe 19 is connected to the flattening shaft 8 through a rotary joint 20. The flattening shaft 8 is connected to the bearing 9. The bearing 9 is above the bearing seat 10. The bearing 9, the rotary reducer 11, and the rotary motor 12 are connected above the machine base 13.

[0044] The travel mechanism includes a travel wheel 15, a travel reducer 16, a travel motor 17, and a track 18. The travel wheel 15 is below the base 13 and above the track 18. The travel reducer 16 and the travel motor 17 are fixed to the lower side of the base 13 and are connected in sequence.

[0045] Among them, the steel slag 1 is above the slag bed 2, and the breaker 3 is above the steel slag 1. The breaker 3 can travel on the track 18 driven by the walking motor 17, and the moving speed of the breaker 3 on the track 18 is 2-20m / min. The leveler 4 relies on the leveling plate 7 to level the steel slag material. The leveling plate 7 is centered on the leveling shaft 8 and can rotate 360° in both positive and negative directions with the leveling shaft 8 under the driving action of the rotating motor 12. The slag breaker 5 relies on the slag breaking teeth 6 to crush the high-temperature steel slag material. The slag breaking teeth 6 are centered on the leveling shaft 8 and can rotate 360° in both positive and negative directions with the leveling shaft 8 under the driving action of the rotating motor 12, thereby realizing the stirring and crushing of the high-temperature steel slag.

[0046] The spreading plate 7 is made of heat-resistant and wear-resistant steel, the axial length of the spreading plate 7 along the flattening shaft 8 is 2-8m, the length along the vertical direction of the flattening shaft 8 is 1-4m, and the thickness is 30-300mm. The slag-breaking teeth 6 are made of heat-resistant and wear-resistant steel. There are 3-6 slag-breaking teeth 6 evenly distributed at the same position in the axial direction of the flattening shaft 8, preferably 3 slag-breaking teeth 6. The length of the slag-breaking teeth 6 is 0.2-2m, the tooth head of the slag-breaking teeth 6 is rhombus-shaped, the thickness of the slag-breaking teeth 6 is 30-300mm, the tooth head thickness is not less than the thickness of the slag-breaking teeth 6, and the length of the rhombus-shaped tooth head is 100-500mm.

[0047] The leveling shafts 8 of the leveler 4 and the slag breaker 5 are installed at the same height on the base 13 of the leveler 3. The outermost edge spacing between the leveler 4 and the slag breaker 5 is 50-500 mm.

[0048] The flattening shaft 8 is made of heat-resistant alloy steel, with a diameter of 300-800mm and a length of 2-8m, and is cooled by water. The upper part of the slag-breaking teeth 6 and the spreading plate 7 close to the flattening shaft 8 can be water-cooled. The circulating cooling water supply pressure is not less than 0.2MPa, and the cooling water inlet temperature does not exceed 35℃.

[0049] Among them, the bearing seat 10, the machine base 13, the connecting beam 14, the running wheel 15, and the track 18 are all made of steel structure materials; the connecting beam 14 is made of heat-resistant alloy steel and is cooled by circulating water. The cooling water pipe 19 is a pressure steel pipe with a design pressure of not less than 0.5Mpa.

[0050] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0051] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for crushing and leveling high-temperature steel slag, characterized in that: The method comprises: Step S1. Steel slag is loaded. A certain high-temperature steel slag (1) is poured onto a slag bed (2) via an overhead crane to form a liquid slag layer or a solid or semi-solid slag pile. The travel motor (17) is started, and the breaker (3) moves with the travel wheel (15) along the track (18) to the high-temperature steel slag (1) slag layer or slag pile. The temperature of the certain high-temperature steel slag (1) poured onto the slag bed (2) is 1100-1700°C. Step S2. Crushing and flattening the steel slag. The slag breaker (5) of the flattening machine (3) stirs and crushes the steel slag (1) to a certain particle size. The flattening machine (4) of the slag breaker (3) flattens the crushed steel slag (1) to a certain thickness. In step S2, stirring and crushing the steel slag (1) further includes: the slag breaker (5) starts a rotating motor (12) on the side of the steel slag (1) to drive the flattening shaft (8) of the slag breaker (5) to rotate, thereby driving the slag breaking teeth (6) to rotate at a rate of 3-30 revolutions per minute to stir and crush the steel slag (1), until the steel slag (1) is cooled, solidified and crushed to a certain particle size. The certain particle size of the steel slag (1) after being crushed by the slag breaker (5) is 10-40 mm. In step S2, The crushed steel slag (1) is further flattened by setting a flattening machine (4) adjacent to a slag crusher (5) on one side of the steel slag (1) for discharging. After the steel slag (1) is crushed, the travel motor (17) is started to drive the flattening machine (3) to move. The flattening machine (4) flattens the crushed steel slag (1) on the slag bed (2) according to a certain thickness. The certain thickness of the steel slag (1) is 200-1200 mm. The flattened steel slag (1) is cooled in the next step. In step S2, a rotating motor (12) is used to drive the flattening shaft (8) on the flattening machine (4) to rotate, thereby driving the flattening plate (7) to rotate at different angles, so as to adjust the lowest position of the flattening plate (7) and the distance between the steel slag and the steel slag to meet the flattening thickness requirement. Step S3: unloading the steel slag. After the flattened steel slag (1) has completed the cooling process, a flattening machine (3) is used to push and unload the cooled steel slag.

2. The high-temperature steel slag crushing and leveling method according to claim 1, characterized in that: In step S3, after the flattened steel slag (1) has been cooled, the slag breaker (3) is moved along the track (18) in the opposite direction of the incoming high-temperature steel slag (1), and the slag breaker (5) and the flattener (4) are used to push and unload the cooled steel slag.

3. The high-temperature steel slag crushing and leveling method according to claim 1, characterized in that: The slag crusher (5) crushes and stirs the high-temperature steel slag (1) for 5-30 minutes. The average thickness of the steel slag (1) on the slag bed (2) after being flattened by the flattening plate (7) is 200-1200 mm. The rotation speed of the flattening plate (7) is 1-10 revolutions per minute.

4. A high-temperature steel slag crushing and flattening device, used in the high-temperature steel slag crushing and flattening method according to any one of claims 1 to 3, characterized in that: The device comprises a slag bed (2), a breaker (3), a machine base (13), a connecting beam (14), a cooling water pipe (19), and a rotating joint (20). There are two machine bases (13), the two machine bases (13) are axially symmetrically arranged on both sides of the slag bed (2) and are fixedly connected via the connecting beam (14). A slewing mechanism is arranged on the upper side of the machine base (13), a walking mechanism is arranged on the lower side of the machine base (13), a cooling water pipe (19) is connected to the slewing mechanism via a rotating joint (20), the breaker (3) is arranged between the two machine bases (13) via the slewing mechanism, the slag bed (2) is arranged below the breaker (3), and the breaker (3) comprises a leveler (4) and a slag breaker (5).

5. The high-temperature slag crushing and flattening device according to claim 4, characterized in that: The slag breaking teeth (6) are connected to the machine base (13) via a rotary mechanism to form a leveler (4), and the leveler plate (7) is connected to the machine base (13) via a rotary mechanism to form a slag breaking machine (5). The slag breaking machine (5) is located on the incoming side of the steel slag (1), and the leveler (4) is located adjacent to the slag breaking machine (5) on the outgoing side of the steel slag (1).

6. The high-temperature slag crushing and flattening device according to claim 4, characterized in that: The rotary mechanism comprises a flattening shaft (8), a bearing (9), a bearing seat (10), a rotary reducer (11), and a rotary motor (12); the flattening machine (4) and the slag breaker (5) are both connected to the machine seat (13) via the flattening shaft (8); the cooling water pipe (19) is connected to the flattening shaft (8) via a rotary joint (20); the flattening shaft (8) and the bearing (9) are connected; the bearing (9) is above the bearing seat (10); and the bearing (9), the rotary reducer (11), and the rotary motor (12) are connected above the machine seat (13).

7. The high-temperature slag crushing and flattening device according to claim 4, characterized in that: The travel mechanism comprises a travel wheel (15), a travel reducer (16), a travel motor (17), and a track (18); the travel wheel (15) is below the machine base (13) and above the track (18); the travel reducer (16) and the travel motor (17) are fixed to the lower side of the machine base (13) and are connected in sequence.

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