Slag breaking device of blast furnace slag flushing dehydrator

Abstract

The utility model discloses a slag breaking device of a blast furnace slag flushing dehydrator, which comprises a driving wheel, a driven wheel, a crushing shaft assembly and a filter screen, and the filter screen is positioned between a dehydration roller and the crushing shaft assembly; a widening part is arranged on the slag channel, and the crushing shaft assembly and the filter screen are both mounted in the widening part; the crushing shaft assembly comprises a coupling, a speed reducer, a bracket, a rotating shaft and a crushing rod group; the number of the crushing rod groups is four, and the crushing rod groups are uniformly distributed in the circumferential direction of the rotating shaft; a plurality of crushing rods in the crushing rod group are sequentially arranged in the length direction of the rotating shaft; the crushing rods in the adjacent crushing rod groups are staggered in the length direction of the rotating shaft; compared with the prior art, the steel slag crushing device has the advantages that large steel slag is crushed through the crushing rod, and deformation of the drum of the dehydrator is avoided.

Description

Technical Field

[0001] This utility model belongs to the technical field of steelmaking equipment, and specifically relates to a slag breaking device for a blast furnace slag flushing dewatering device. Background Technology

[0002] In steel plants, the blast furnace is the core of the entire long-process steelmaking process, often considered the "heart" of the plant. Stable blast furnace production is the primary condition for the operation of the entire process. The blast furnace process can be divided into the charging and transfer system, the blast furnace body, the blast system, the heat distribution system, the pulverized coal injection system, and auxiliary operating systems such as TRT (Transportation and Recycling). The main products of the blast furnace are molten iron and slag. After the taphole is opened in front of the furnace, the upper layer of slag, with lower density, is discharged through the slag ditch via a slag-iron separator. The lower layer, the denser molten iron, is transported through the iron ditch and ladle to the ladle for the next steelmaking process. This section focuses on the slag ditch. Through water flushing, the slag enters a slag pool or dewatering device for slag and water separation, enabling controlled water slag sales and slag-water recycling. In other words, the slag is quenched in front of the furnace and in the slag pool. The current method of using pre-furnace water quenching and dewatering descaling is relatively novel, saves space, and has high operating efficiency. In other words, the slag is flushed and quenched in front of the furnace, and the water and slag enter the slag channel, and then enter the dewatering device through the slag channel. After the dewatering device rotates, the water and slag are separated by centrifugal force. The water is discharged into the water pool, and the slag is transported to the slag disposal site through the chute onto the conveyor belt. It is simple and fast.

[0003] Currently, many slag flushing dewatering systems are in use, but they have certain drawbacks. Due to the influence of the pressure and volume of the flushing water in front of the furnace, the slag formed during flushing is uneven and forms clumps. Large clumps not only easily cause wear and damage to the slag channel, but also cause damage to the screen inside the dewatering device when it enters the dewatering device, the chute sinks and falls off due to impact, and the liner plate falls off and is damaged. Finally, the slag accumulates in the chute inside the dewatering device and cannot flow smoothly. If the accumulation is too large, slag and water will leak out, the dewatering device will lose its function and cannot achieve normal slag-water separation. This will eventually lead to the deformation of the dewatering device drum, wear and tear of equipment such as the gear ring, drag ring and reducer, and continuous shutdown, repair, and cleaning work.

[0004] Among existing patents, application number 201420283718.1, entitled "A Novel Blast Furnace Large Slag Separation and Discharge Device," includes a dewatering device, a feeding chute, a large slag landing platform, and a slag conveyor belt platform. Its key feature is that a first and second feeding rail are installed in front of the feeding chute, with a gap between them for small slag pieces to pass through. These small slag pieces fall through this gap onto a second iron feeding rail and enter the slag conveyor belt platform. Large slag pieces accumulate on the large slag landing platform after passing the first feeding rail, where they are processed, cooled, and crushed before being sent to the conveyor belt. This invention, by setting up the first and second feeding rails, filters small slag pieces first, and then sends large slag pieces to the large slag landing platform for crushing and cooling before being sent to the conveyor belt. However, this application only screens and crushes steel slag after it has been treated by the dewatering device, failing to pre-treat the steel slag entering the dewatering device, which can easily cause dewatering device malfunctions. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a slag breaking device for a blast furnace slag flushing dewatering device, and to prevent steel slag from forming large clumps in the slag channel and clogging the dewatering device.

[0006] To solve the above problems, the present invention adopts the following technical solution:

[0007] A blast furnace slag flushing dewatering device includes a dewatering drum and a motor for driving the dewatering drum to rotate. Steel slag water flows into the dewatering drum through a slag channel. The device includes a driving wheel driven by the motor, a driven wheel driven by the driving wheel, a crushing shaft assembly fixedly connected to the driven wheel, and a filter screen disposed in the slag channel. The filter screen is located between the dewatering drum and the crushing shaft assembly. The crushing shaft assembly is disposed in the slag channel, and the length direction of the crushing shaft assembly is perpendicular to the length direction of the slag channel.

[0008] Furthermore, the slag channel is provided with a widening section, the width of the widening section is L, the width of the slag channel is L, and 1.5L3≦L2≦2L3; the crushing shaft assembly and the filter screen are both installed in the widening section.

[0009] Furthermore, the crushing shaft assembly includes a reducer whose input end is fixedly connected to the output end of the motor, a bracket rotatably connected to the driven wheel, a rotating shaft fixedly connected to the driven wheel, and a crushing rod assembly fixedly connected to the rotating shaft; the driving wheel is fixedly connected to the output end of the reducer; the driving wheel and the driven wheel are connected by belt drive; the crushing rod assembly is used to crush large steel slag in the steel slag molten metal.

[0010] Furthermore, there are four crushing rod groups, which are evenly distributed along the circumference of the rotating shaft; several crushing rods in each crushing rod group are arranged sequentially along the length of the rotating shaft; and the crushing rods in adjacent crushing rod groups are staggered along the length of the rotating shaft.

[0011] Furthermore, a gap is provided between the breaking rod and the bottom of the widened portion.

[0012] Furthermore, the belt is equipped with a tensioning device.

[0013] Furthermore, the tensioning device includes a fixed frame on one side of the belt, a V-shaped rod rotatably connected to the fixed frame, and a tensioning wheel rotatably connected to one end of the V-shaped rod; the tensioning wheel abuts against the belt; a counterweight nut is provided at the other end of the V-shaped rod; the counterweight nut is threadedly connected to the V-shaped rod.

[0014] Compared with the prior art, the significant beneficial effects achieved by this utility model are as follows:

[0015] The crushing shaft assembly installed in the slag channel can break up large pieces of steel slag in the molten steel slag. The filter screen can separate the large pieces of steel slag, which are then crushed by the crushing shaft assembly and passed through the filter screen again before entering the dewatering device. This prevents large pieces of steel slag from entering the dewatering device and causing it to malfunction.

[0016] By setting a widening section on the slag channel, the flow rate of molten steel slag slows down after entering the widening section, making it easier for the crushing rod on the crushing shaft to fully crush the steel slag.

[0017] The tensioning device prevents the belt from becoming too loose and slipping during use, thus affecting the crushing efficiency; the tension can be adjusted by adjusting the position of the counterweight nut.

[0018] By staggering the crushing rods in adjacent crushing rod groups along the length of the shaft, large steel slags can be prevented from flowing into the dewatering unit through the gaps between the same group of crushing rods, thus ensuring that the steel slag is thoroughly crushed. Attached Figure Description

[0019] Appendix Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Appendix Figure 2 This is a partial schematic diagram of the crusher shaft assembly;

[0021] Appendix Figure 3 This is a schematic diagram of the axial structure of the crusher shaft assembly;

[0022] Appendix Figure 4 This is a schematic diagram of the tensioning device.

[0023] In the attached diagram,

[0024] 1-Dehydration drum, 2-Motor, 21-Coupling, 22-Gear, 3-Second coupling, 4-Reducer, 5-Drive pulley, 6-Belt;

[0025] 7-Tensioning device, 71-Fixing frame, 72-V-bar, 73-Tensioning wheel, 74-Counterweight nut;

[0026] 8-Driven wheel, 9-Support, 11-Slag passage, 12-Wide section, 13-Crushing rod, 14-Rotating shaft, 15-Filter screen. Detailed Implementation

[0027] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this application or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0028] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this application.

[0029] Example 1

[0030] like Figure 1 , Figure 2 and Figure 3 As shown,

[0031] The dewatering device includes a dewatering drum 1 and a motor 2 for driving the dewatering drum 1 to rotate. Steel slag molten steel flows into the dewatering drum 1 through a slag channel 11. The motor 2 is connected to a gear 22 via a coupling 21. The gear 22 meshes with a gear ring on the dewatering drum 1, driving the dewatering drum to rotate and thus separating the steel slag from the water. Two sets of motor 2, coupling 21, and gear 22 are provided, driving both sides of the gear ring respectively. To save on investment, we use the existing motor 2 as the power source to drive the slag crushing device to crush the steel slag.

[0032] A blast furnace slag flushing dewatering device includes a driving wheel 5 driven by a motor 2, a driven wheel 8 driven by the driving wheel 5, a crushing shaft assembly fixedly connected to the driven wheel 8, and a filter screen 15 disposed within the slag passage 11. The filter screen 15 is located between the dewatering drum 1 and the crushing shaft assembly. The crushing shaft assembly is disposed within the slag passage 11, and its length direction is perpendicular to the length direction of the slag passage 11. The mesh diameter of the filter screen 15 should be smaller than the maximum allowable slag diameter of the dewatering drum 1 to prevent slag flowing through the filter screen 15 from clogging the dewatering drum 1 and causing malfunctions.

[0033] The detailed structure is as follows: In order to fully crush the steel slag in the molten steel slag and slow down the flow of the molten steel slag, the slag channel 11 at the location where the crushing shaft assembly and filter screen 15 are installed is widened; the slag channel 11 is provided with a widening part 12, the width of the widening part 12 is L2, and the width of the slag channel 11 is L3, wherein 1.5L3≦L2≦2L3; if the width of the widening part 12 is too wide, the flow rate of the molten steel slag will be too slow, affecting efficiency; if the width is too narrow, the flow rate of the molten steel slag will be too fast, resulting in insufficient crushing and easy clogging of the dewatering device. The most suitable width is 1.8 times the width of the slag channel 11.

[0034] like Figure 2 As shown, the crushing shaft assembly includes a reducer 4 whose input end is fixedly connected to the output end of the motor 2, a bracket 9 rotatably connected to the driven wheel 8, a rotating shaft 14 fixedly connected to the driven wheel 8, and a crushing rod assembly fixedly connected to the rotating shaft 14; the driving wheel 5 is fixedly connected to the output end of the reducer 4; the driving wheel 5 and the driven wheel 8 are connected by a belt 6; the crushing rod assembly is used to crush large steel slags in the molten steel slag. A second coupling 3 is used to further crush the steel slags.

[0035] like Figure 3 As shown, there are four crushing rod groups, which are evenly distributed along the circumference of the rotating shaft 14; several crushing rods 13 within the crushing rod groups are arranged at intervals along the length of the rotating shaft 14.

[0036] The spacing between the crushing rods 13 in the same crushing rod group is less than or equal to the maximum steel slag diameter that the dewatering drum 1 can pass through; the crushing rods 13 in adjacent crushing rod groups are staggered along the length of the rotating shaft 14, so that large steel slag can be fully crushed through the four sets of stirring rods.

[0037] like Figure 2 As shown, a second coupling 3, a reducer 4, a drive wheel 5, a belt 6 and a driven wheel 8 are installed on both sides of the widened part 12 to drive the two ends of the rotating shaft 14 respectively. Since it is a belt drive, instantaneous slippage is allowed, so there is no need to install a synchronizer.

[0038] The working process of this utility model,

[0039] After the molten steel slag flows into the widened section 12 through the slag channel 11, it is decelerated, the motor 2 rotates, and the reducer 4 rotates through the coupling 3. The reducer 4 rotates, which drives the drive wheel 5 to rotate, and the driven wheel 8 rotates through the belt 6. The driven wheel 8 drives the crushing rod 13 to rotate, crushing large pieces of steel slag. After the crushed large pieces of steel slag are intercepted by the filter screen 15, the crushing rod 13 continues to crush until they can pass through the filter screen 15, and finally enter the dewatering drum 1 for separation.

[0040] Example 2

[0041] The structure of this embodiment is largely the same as that of Embodiment 1.

[0042] The difference is that,

[0043] like Figure 3 As shown, a gap is provided between the bottom of the crushing rod 13 and the bottom of the widening portion 12. If there is no gap, the crushing rod 13 will rub against the bottom of the widening portion 12, causing the bottom of the widening portion 12 to wear out quickly. The gap must not be greater than the maximum allowable steel slag diameter of the dewatering drum 1, so as to prevent large steel slag from flowing into the dewatering drum 1 and causing damage to the drum.

[0044] like Figure 2 As shown, the distance between the filter screen 15 and the top of the crushing rod 13 is less than the maximum allowable diameter of steel slag in the dewatering device. In this way, slightly larger pieces of steel slag blocked by the filter screen 15 can be further crushed and mashed by the crushing rod 13, and then pass through the filter screen 15 into the dewatering device drum 1.

[0045] Example 3

[0046] The structure of this embodiment is largely the same as that of embodiment 2.

[0047] The difference is that,

[0048] After a period of use, due to the characteristics of rubber components, the belt will generally stretch, which will cause the pulley to slip and lose rotation. Therefore, the belt 6 is equipped with a tensioning device 7.

[0049] like Figure 4 As shown, the tensioning device 7 includes a fixed frame 71 on one side of the belt 6, a V-shaped rod 72 rotatably connected to the fixed frame 71, and a tensioning wheel 73 rotatably connected to one end of the V-shaped rod 72; the tensioning wheel 73 abuts against the belt 6; the other end of the V-shaped rod 72 is provided with a counterweight nut 74; the counterweight nut 74 is threadedly connected to the V-shaped rod 72.

[0050] The detailed structure is as follows: the V-shaped rod 72 consists of two rods with a radius of less than 90. The intersection of the two rods is rotatably connected to the fixed frame 71 via a rotating shaft. A bearing (tensioning wheel 73) is installed at the end of one rod. The inner ring of the bearing is tightly fitted with the end of the rod, and the outer ring of the bearing presses against the surface of the belt 6. The end of the other rod is provided with an external thread and a counterweight nut 74. The distance between the counterweight nut 74 and the intersection of the two rods can be adjusted by the thread to change the lever arm of the counterweight nut 74 on the intersection of the two rods, thereby adjusting the tension of the bearing on the belt 6.

Claims

1. A blast furnace slag flushing dewatering device, the dewatering device comprising a dewatering drum (1) and a motor (2) for driving the dewatering drum (1) to rotate, wherein molten steel slag flows into the dewatering drum (1) through a slag channel (11); characterized in that: The motor (2) is connected with a driving wheel (5), the driving wheel (5) is connected with a driven wheel (8), the driven wheel (8) is fixedly connected with a crushing shaft assembly, and a filter screen (15) is arranged in the slag channel (11), the filter screen (15) is located between the dehydration roller (1) and the crushing shaft assembly; the crushing shaft assembly is arranged in the slag channel (11), and the length direction of the crushing shaft assembly is perpendicular to the length direction of the slag channel (11).

2. A slag breaking device for a de-watering device of a slag tap of a blast furnace according to claim 1, characterized in that: A widened portion (12) is arranged on the slag channel (11), the width of the widened portion (12) is L2, the width of the slag channel (11) is L3, 1.5L3≦L2≦2L3; the crushing shaft assembly and the filter screen (15) are both arranged in the widened portion (12).

3. A slag breaking device for a de-watering device of a slag tap of a blast furnace according to claim 2, characterized in that: The crushing shaft assembly comprises a speed reducer (4) fixedly connected with the output end of the motor (2), a support (9) rotatably connected with the driven wheel (8), a rotating shaft (14) fixedly connected with the driven wheel (8), and a plurality of crushing rod groups fixedly connected with the rotating shaft (14); the driving wheel (5) is fixedly connected with the output end of the speed reducer (4); the driving wheel (5) and the driven wheel (8) are connected through a belt (6); the crushing rod groups are used for crushing large steel slag in water.

4. A slag breaking device for a de-watering device of a slag tap of a blast furnace according to claim 3, characterized in that: The number of the crushing rod groups is four, the crushing rod groups are uniformly distributed along the circumferential direction of the rotating shaft (14); a plurality of crushing rods (13) in the crushing rod groups are sequentially arranged along the length direction of the rotating shaft (14); the crushing rods (13) in adjacent crushing rod groups are arranged in a staggered manner along the length direction of the rotating shaft (14).

5. A slag breaking device for a de-watering device of a slag tap of a blast furnace according to claim 4, characterized in that: The crushing rod (13) and the bottom of the widened portion (12) are provided with a gap.

6. A slag breaking device for a de-watering device of a slag tap of a blast furnace according to claim 3, characterized in that: The belt (6) is provided with a tensioning device (7).

7. A slag breaking device for a de-watering device of a slag tap of a blast furnace according to claim 6, characterized in that: The tensioning device (7) comprises a fixed frame (71) arranged on one side of the belt (6), a V-shaped rod (72) rotatably connected with the fixed frame (71), and a tensioning wheel (73) rotatably connected with one end of the V-shaped rod (72); the tensioning wheel (73) abuts against the belt (6); the other end of the V-shaped rod (72) is provided with a counterweight nut (74); and the counterweight nut (74) is threadedly connected with the V-shaped rod (72).

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