CN215288872U

CN215288872U - Molten iron desulphurization and ladle tipping-free slag salvaging device

Info

Publication number: CN215288872U
Application number: CN202121557709.3U
Authority: CN
Inventors: 李勇; 冷永磊; 李炳岳; 武将; 李睿翀; 王娜娜
Original assignee: Lvliang Jianlong Industrial Co Ltd
Current assignee: Lvliang Jianlong Industrial Co Ltd
Priority date: 2021-07-09
Filing date: 2021-07-09
Publication date: 2021-12-24
Anticipated expiration: 2031-07-09

Abstract

The utility model provides a molten iron desulfurization and ladle are exempted from to tumble and are dragged for sediment device, belong to molten iron desulfurization and drag for sediment equipment field, the problem that desulfurization efficiency and drag for the sediment not clean has mainly been solved, construct and drag for sediment mechanism including desulfurization mechanism, desulfurization mechanism includes the torpedo jar, the torpedo jar sets up the one side at the ladle perpendicularly, placing on the steel flat car of ladle, the top slope of ladle is provided with the spray gun, the muzzle of spray gun aims at the orbit position that torpedo jar opening flowed out the molten iron, the other end of spray gun is connected with gas holder and powder storage tank through the gas powder connector, drag for sediment mechanism and include the slide rail and set up the moving mechanism on the slide rail, be connected with the connecting rod on the moving mechanism, the centre of connecting rod is by being provided with freely movable joint down and is divided into connecting rod and lower connecting rod with the connecting rod, the lower connecting rod bottom is connected with drags for the sediment spoon. The simple and reasonable tool is matched and used by utilizing the existing equipment, the occupied area is small, the investment cost is low, the desulfurization efficiency is high, the resulfurization is not easy, and the loss of molten iron is less.

Description

Molten iron desulphurization and ladle tipping-free slag salvaging device

Technical Field

The utility model belongs to molten iron desulfurization and drag for sediment equipment field, concretely relates to molten iron desulfurization and ladle are exempted from to tumble and are dragged for sediment device.

Background

The existing methods for pre-desulfurizing molten iron are mainly divided into three methods, namely a blowing method, a K-R method and a composite method, wherein the blowing method is to blow a desulfurizing agent into a torpedo car for conveying molten iron or a ladle of a steel mill by a carrier gas through a spray gun so as to ensure that powder is fully contacted with the molten iron, the generated waste residue is removed by using a slag raking machine in the floating process, the K-R method is to stir the molten iron in the molten iron tank by rotating a stirrer so as to generate vortex, and the added desulfurizing agent is rolled into the molten iron to fully react, the complex method is that blowing-assisting gas is used to rotate the molten iron, then a spray gun is used to blow the desulfurizer into the ladle to enable the desulfurizer to fully react, and finally the slag is removed by the slag raking machine.

The common disadvantages of the above three methods are: the existing desulfurization process has the advantages of high equipment investment cost, complex pretreatment process, overlong construction period, large equipment floor area and high molten iron loss.

SUMMERY OF THE UTILITY MODEL

In order to solve not enough among the above-mentioned background art, the utility model provides a molten iron desulfurization and ladle are exempted from to tumble and are dragged for sediment device, utilize high-pressure mixed spray gun cooperation torpedo jar and molten iron car, when pouring the molten iron into the ladle from the torpedo jar, use the high-pressure mixed spray gun to aim at the molten iron stream of pouring and spout, make molten iron and desulfurizer fully react, and after the desulfurization finishes, use the telescopic to drag for sediment spoon cooperation telescopic push rod and realize that the high-efficient sediment is dragged for, low-cost equipment device simple to use, realize the high-efficient preliminary treatment of molten iron with this.

The utility model provides a molten iron desulfurization and ladle exempt from to overturn drags for sediment device which characterized in that: including desulfurization mechanism and drag for sediment mechanism, desulfurization mechanism includes torpedo jar, ladle, the torpedo jar sets up in one side top of ladle perpendicularly, and the torpedo jar is provided with the opening, and the ladle is placed on steel flatcar, and the top slope of ladle is provided with the spray gun, and the muzzle of spray gun aims at the orbit position that torpedo jar opening flows out the rivers, the other end of spray gun is connected with gas holder and powder storage tank through the gas powder connector, the sediment is dragged for the mechanism and is included the slide rail and set up the moving mechanism on the slide rail, vertical movably connected with connecting rod on the moving mechanism, the centre of connecting rod is provided with the freely movable joint by the lower position and divide into connecting rod and lower connecting rod with the connecting rod, and the lower connecting rod bottom is connected with drags for the sediment spoon.

The desulfurizer is sprayed into molten iron flow in the process of pouring molten iron into a ladle by using a dual-mixing spray gun at a torpedo ladle, so that the molten iron and the desulfurizer fully react, and a connecting rod capable of moving left and right and moving up and down and a slag spoon connected below the connecting rod are used after the desulfurization is finished, and the telescopic push rod is matched to drag slag and discharge slag, so that the high-efficiency desulfurization and the rapid slag dragging pretreatment of the molten iron are realized.

Further, an air inlet pipe is arranged on the air storage tank, an air inlet valve is arranged on the air inlet pipe, and a gas switch valve and a gas flow regulating valve are arranged on an air outlet pipeline connected with the air storage tank and the gas powder connector. The gas storage tank is provided with a gas inlet pipe for introducing gas, meanwhile, a gas switch valve is arranged on a gas outlet pipeline of the gas storage tank, the control pipeline is communicated, and a gas flow regulating valve controls the flow of the communicated gas to further control the spraying speed of the spray gun.

Furthermore, nitrogen is filled in the gas storage tank, and the pressure in the gas storage tank is 0.4-0.6 MPa. The lance is a high pressure lance and is driven using nitrogen as the high pressure kinetic energy.

Furthermore, a powder switch valve and a powder flow regulating valve are arranged on a powder outlet pipeline which is connected with the gas-powder connector of the powder storage tank, and a switch cover is arranged on the powder storage tank. The switch cover is used for adding a desulfurizer, the powder switch valve is arranged on the powder outlet pipeline, the control pipeline is communicated, and the powder flow regulating valve controls the flow of the discharged desulfurizer, so that the spraying amount of the desulfurizer in the spray gun is controlled, the use of the desulfurizer is reduced under the condition of ensuring full reaction with molten iron, and the cost is reduced.

Furthermore, the inner center position of the spray gun is provided with an air-powder mixing pipeline which is communicated with the air-powder connector and the gun mouth of the spray gun, and the spray gun is provided with a cooling water inlet and a cooling water outlet.

Furthermore, the moving mechanism comprises a driving motor and a speed reducer, a rack is arranged on the surface of the upper half part of the upper connecting rod, and the upper connecting rod is connected with the speed reducer through the rack. The moving mechanism is driven by a driving motor, is connected with the upper connecting rod after passing through the speed reducer, and is connected and moved by a rack, so that the moving mechanism is stable in movement and high in moving precision.

Furthermore, a telescopic push rod is connected to the lower connecting rod, and the other end of the telescopic push rod is connected with a cross beam fixed to the upper connecting rod. The lower connecting rod is connected with the upper connecting rod through a movable joint and can rotate, the telescopic push rod controls the rotation of the lower connecting rod, and then the slag spoon connected with the lower connecting rod is controlled.

Furthermore, the slag spoon is hemispherical, the spherical surface is arranged downwards, the upper part is a plane, and a serrated slag grid is arranged on the upper plane.

Compared with the prior art, use the beneficial effects of the utility model reside in that:

1. the high-pressure mixing spray gun formed by mixing the high-pressure spray gun and the powdery desulfurizer is used for spraying the desulfurizer into molten iron flow in the process of pouring molten iron into a ladle by using a torpedo ladle, so that the desulfurizer and the molten iron are fully mixed, and the switching valves and the flow regulating valves are arranged on the pipelines of the high-pressure mixing spray gun for controlling, so that the desulfurization efficiency is increased;

2. the connecting rod capable of moving up and down is used for controlling the slag salvaging spoon to move up and down, the telescopic push rod is used for controlling the lower connecting rod to rotate, the position of the slag salvaging spoon is further controlled, and slag salvaging and slag discharging of molten iron are realized;

3. the simple and reasonable tool is matched and used by utilizing the existing equipment, the occupied area is small, the equipment investment is small, the desulfurization efficiency is high, the resulfurization is not easy, the molten iron loss is small, and the operation of the whole device is simple.

Drawings

FIG. 1 is a schematic view of a desulfurization mechanism of a preferred embodiment of a ladle tilting-free slag extractor for molten iron desulfurization provided by the present invention;

FIG. 2 is a schematic illustration of slag salvaging of the slag salvaging mechanism of the preferred embodiment;

FIG. 3 is a slag discharge schematic view of the slag removing mechanism of the preferred embodiment;

FIG. 4 is a schematic diagram of the structure of the lance of the desulfurization mechanism in the preferred embodiment.

Wherein: 1. a torpedo ladle; 2. a ladle; 3. flatcar of steel; 4. a gas storage tank; 5. a powder storage tank; 6. a gas-powder communicating vessel; 7. a spray gun; 8. a moving mechanism; 9. a slide rail; 10. a connecting rod; 11. a cross beam; 12. a telescopic push rod; 13. a movable joint; 14. a slag spoon; 15. a slag pan; 41. an intake valve; 42. a gas switching valve; 43. a gas flow regulating valve; 51. a powder switch valve; 52. a powder flow regulating valve; 71. a gas-powder mixing pipeline; 72. a cooling water inlet; 73. a cooling water outlet; 101. an upper connecting rod; 102. a lower connecting rod.

Detailed Description

In order to make the objects, technical solutions and advantageous effects of the present invention more clearly understood, the following detailed description of the technical solutions of the present invention is made with reference to the accompanying drawings.

The utility model provides a molten iron desulfurization and ladle are exempted from to tumble and are dragged for sediment device, includes desulfurization mechanism and drags for the sediment mechanism, as shown in figure 1 and figure 2, desulfurization mechanism includes torpedo jar 1, ladle 2, torpedo jar 1 sets up perpendicularly in one side top of ladle 2, torpedo jar 1 is provided with the opening, and ladle 2 places on flat car 3, and the top slope of ladle 2 is provided with spray gun 7, and the muzzle of spray gun 7 aims at the orbit position that torpedo jar 1 opening flowed out the molten iron, still aims at the entrance of ladle 2 simultaneously, the other end of spray gun 7 is connected with gas holder 4 and powder storage tank 5 through gas powder connector 6, and the connection between gas powder connector 6 and the pipeline all uses the flange to connect.

Be provided with an intake pipe on the gas holder 4, be equipped with admission valve 41 in the intake pipe, the gaseous of control gas holder 4 lets in, the filling has nitrogen gas in the gas holder 4, and tank internal pressure is 0.4 ~ 0.6MPa, and is the high pressure, is provided with gas switch valve 42 and gas flow control valve 43 on the gas holder 4 is connected with gas powder connector 6's outlet pipeline, and gas switch valve 42 control pipeline intercommunication, gas flow control valve 43 controls the flow of intercommunication gas, further controls the blowout speed of spray gun 7.

Meanwhile, a powder switch valve 51 and a powder flow regulating valve 52 are arranged on a powder outlet pipeline connected with the powder storage tank 5 and the gas-powder connector 6, a switch cover is arranged on the powder storage tank 5 and used for adding a desulfurizer and isolating the powder storage tank 5 from the outside, the powder switch valve 51 is communicated with the control pipeline, and the powder flow regulating valve 52 is used for controlling the flow of the flowing desulfurizer, so that the spraying amount of the desulfurizer in the spray gun 7 is controlled, the use of the desulfurizer is reduced under the condition of ensuring full reaction with molten iron, and the cost is reduced.

Referring to fig. 4, the spray gun 7 is provided with a gas-powder mixing pipe 71 at its center for communicating the gas-powder connector 6 with the nozzle of the spray gun 7, and the spray gun 7 is provided with a cooling water inlet 72 and a cooling water outlet 73. After passing through the gas-powder connector 6, the desulfurizing agent and the nitrogen gas are mixed and then enter a gas-powder mixing pipeline inside the spray gun 7, and are sprayed out from the gun head of the spray gun 7 through the pipeline, and the spray gun 7 is cooled by a cooling system arranged on the spray gun 7 due to the fact that the spray gun works in a high-pressure environment.

The slag fishing mechanism comprises a slide rail 9 and a moving mechanism 8 arranged on the slide rail 9, the moving mechanism 8 comprises a driving motor and a speed reducer, a rack is arranged on the surface of the upper half part of an upper connecting rod 101, the upper connecting rod 101 is connected with the speed reducer through the rack, the motor drives the speed reducer to control the up-and-down motion of the connecting rod 10, a movable joint 13 is arranged at the lower position of the middle of the connecting rod 10 to divide the connecting rod 10 into an upper connecting rod 101 and a lower connecting rod 102, and a telescopic push rod 12 is connected onto the lower connecting rod 102.

The other end of telescopic push rod 12 links to each other with the crossbeam 11 of fixing at last connecting rod 101, and the upper end of telescopic push rod 12 is fixed on crossbeam 11, and the lower extreme of telescopic push rod 12 articulates on connecting rod 102 down, and lower connecting rod 102 bottom is connected with drags for sediment spoon 14, drag for sediment spoon 14 to the hemisphere, spherical face sets up downwards, and the top is the plane, has arranged the cockscomb structure sediment bars on the plane of top, and the cockscomb structure sediment bars are collected the waste residue, and the molten iron then can flow through the gap of sediment bars, reduces the loss of molten iron.

The utility model discloses a theory of operation does:

the working principle of the desulfurization mechanism is as follows: firstly, a torpedo ladle 1 transported from a blast furnace area to a ladle dumping station area of a steel-making workshop is transported to a dumping position, the molten iron is subjected to temperature measurement and sampling, the initial sulfur content in the molten iron is detected, the required amount of a desulfurizing agent is determined according to the requirements of steel production, then the desulfurizing agent with the basic required amount (accounting for about 20 percent of the total amount of the desulfurizing agent) is added in advance at the bottom of a ladle 2, before the molten iron flows into the ladle, a spray gun 7 is transferred to a spraying position, the spray gun 7 is about 300 mm away from the dumping molten iron flow, a high-pressure nitrogen gas switch valve 42 is opened at the same time, a pipeline is purged by nitrogen for 30 seconds to ensure the smoothness of the pipeline, then the molten iron starts to be dumped from the torpedo ladle 1 to the ladle 2, when the molten iron is dumped into the ladle 1, a valve of a powder switch valve 51 of a powder storage tank 5 is opened, and a corresponding gas flow regulating valve 43 and a powder flow regulating valve 52 are regulated to release the desulfurizing agent according to a certain flow rate, blowing the desulfurizer out of the spray gun 7 by utilizing the blowing kinetic energy of nitrogen, enabling the desulfurizer to obtain the kinetic energy condition of high-speed flow, fully contacting with the high-temperature molten iron flowing downwards, stirring the desulfurizer by utilizing the impact power of the molten iron, allowing the incompletely reacted desulfurizer to enter the ladle 2 along with the molten iron, continuing to react under the stirring action of the subsequently poured molten iron, fully reacting with the desulfurizer at the bottom of the ladle 2 at the same time, and finally achieving the aim of desulfurization.

As shown in fig. 2 and 3, the slag dragging mechanism works according to the following principle: the reacted desulfurized slag floats on the upper surface of the molten iron to form a slag layer, the moving mechanism 8 is controlled to move the slag spoon 14 to the upper part of the ladle, the connecting rod 10 is controlled to slowly lower the slag spoon 14 to ensure that the slag spoon 14 is immersed into the liquid level of the molten iron after passing through the slag layer, after the slag spoon 14 is filled with the mixture of the desulfurized slag and the molten iron, the connecting rod 10 is controlled to slowly lift the desulfurized slag and the molten iron, after the slag spoon 14 rises to be about 400 mm away from the surface of the molten iron, the lifting is stopped, the telescopic push rod 12 for tipping is started to incline the slag spoon to about 25 degrees, the molten iron flows out from a gap of a zigzag slag grid at the edge of the slag spoon 14 and falls into the ladle 1 to reduce the loss of the molten iron, the telescopic push rod 12 is controlled to level the position of the slag spoon 14, after the molten iron tends to be stable, the moving mechanism 8 is controlled to move the upper part of the slag pan 15, the electric liquid push rod 12 is controlled again to fully incline the slag spoon 14, the inside desulfurized slag is entirely poured into the slag pan 15. Repeating the operation for several times, fishing out the desulphurization slag as much as possible from the ladle to prevent the residual desulphurization slag from being poured into the converter for resulfurization, and finally hoisting the molten iron tank after the desulphurization pretreatment by using a crown block and adding the molten iron tank into the converter.

Finally, it should be noted that: the above embodiments are only used for illustrating the present invention and not for limiting, the present invention has been described in detail with reference to the preferred embodiments, and the devices and mechanisms not described in detail in the embodiments of the present invention are the prior art, and those skilled in the art should understand that the modifications or equivalent substitutions made to the present invention without creative thinking are all included in the scope of the claims of the present invention.

Claims

1. The utility model provides a molten iron desulfurization and ladle exempt from to overturn drags for sediment device which characterized in that: the device comprises a desulfurization mechanism and a slag dragging mechanism, wherein the desulfurization mechanism comprises a torpedo tank (1) and a ladle (2), the torpedo tank (1) is vertically arranged above one side of the ladle (2), the torpedo tank (1) is provided with an opening, the ladle (2) is placed on a steel flat car (3), a spray gun (7) is obliquely arranged above the ladle (2), the muzzle of the spray gun (7) is aligned with the track position of the molten iron flowing out from the opening of the torpedo tank (1), the other end of the spray gun (7) is connected with a gas storage tank (4) and a powder storage tank (5) through a gas-powder connector (6), the slag dragging mechanism comprises a slide rail (9) and a moving mechanism (8) arranged on the slide rail (9), the moving mechanism (8) is vertically and movably connected with a connecting rod (10), a movable joint (13) is arranged in the middle of the connecting rod (10) and is used for dividing the connecting rod (10) into an upper connecting rod (101) and a lower connecting rod (102), the bottom end of the lower connecting rod (102) is connected with a slag spoon (14).

2. The apparatus of claim 1, wherein the apparatus comprises: an air inlet pipe is arranged on the air storage tank (4), an air inlet valve (41) is arranged on the air inlet pipe, and a gas switch valve (42) and a gas flow regulating valve (43) are arranged on an air outlet pipeline connected with the gas powder connector (6) on the air storage tank (4).

3. The apparatus of claim 2, wherein the apparatus comprises: the gas storage tank (4) is filled with nitrogen, and the pressure in the tank is 0.4-0.6 MPa.

4. The apparatus of claim 1, wherein the apparatus comprises: a powder switch valve (51) and a powder flow regulating valve (52) are arranged on a powder outlet pipeline connected with the powder storage tank (5) and the gas-powder connector (6), and a switch cover is arranged on the powder storage tank (5).

5. The apparatus of claim 1, wherein the apparatus comprises: the central position in the spray gun (7) is an air-powder mixing pipeline (71) which is communicated with the air-powder connector (6) and the muzzle of the spray gun (7), and the spray gun (7) is provided with a cooling water inlet (72) and a cooling water outlet (73).

6. The apparatus of claim 1, wherein the apparatus comprises: the moving mechanism (8) comprises a driving motor and a speed reducer, a rack is arranged on the surface of the upper half part of the upper connecting rod (101), and the upper connecting rod (101) is connected with the speed reducer through the rack.

7. The apparatus of claim 1, wherein the apparatus comprises: the lower connecting rod (102) is connected with a telescopic push rod (12), and the other end of the telescopic push rod (12) is connected with a cross beam (11) fixed on the upper connecting rod (101).

8. The apparatus of claim 1, wherein the apparatus comprises: the slag spoon (14) is hemispherical, the spherical surface is arranged downwards, the upper part is a plane, and a serrated slag grid is arranged on the upper plane.