CN206253644U - A kind of outer arranging device of stuffing sand - Google Patents

Abstract

The utility model relates to a drainage sand discharge device. The drainage sand discharge device comprises a steel ladle, a ladle rotary table, a motor drive mechanism, a T-shaped tundish, a storage tank and a rotary fork arm. The steel ladle rotary table is arranged in the middle of the T-shaped The T-shaped head of the ladle is directly in front of the ladle. The ladle is placed on the ladle clamping part at the front end of the rotary yoke. The rotary yoke is driven by a motor drive mechanism to rotate 360° on the ladle turret. The storage tank is placed in the T-shaped tundish. The side of the T-shaped head, the tank mouth of the storage tank and the pouring gate of the impact zone of the T-shaped tundish are located on the same circumference. The bottom of the ladle is provided with a sliding nozzle, and a sliding nozzle slide plate is provided on the sliding nozzle. The pouring method of the continuous casting ladle is to first discharge the drainage sand in the ladle into the storage tank, and then start pouring after discharging about 3/4 of the amount. The utility model adopts the drainage sand discharge device to discharge the drainage sand in the steel ladle, which can effectively improve the purity of the molten steel in the T-shaped tundish and ensure the quality of the billet.

Description

A kind of drainage sand discharge device

technical field

The utility model relates to the technical field of iron and steel metallurgy continuous casting, in particular to a drainage sand discharge device which can reduce the flow of drainage sand into a continuous casting tundish during continuous casting ladle casting.

Background technique

In the ladle opening process of continuous casting, since the drainage sand drainage has the advantages of simple operation, high automatic casting rate and low cost, most domestic steel mills currently adopt this method in the ladle opening process. In actual production, the operator After the long nozzle is connected, the ladle slide is gradually pulled to the maximum opening in the form of hydraulic drive, the molten steel in the ladle directly enters the impact zone of the tundish through the ladle nozzle, and the drainage sand in the ladle directly enters the tundish. However, with the in-depth research on the production process of high-clean steel, such an operation method gradually shows its shortcomings, mainly as follows: When the ladle is poured, a large amount of drainage sand will fall into the tundish, which increases the probability of foreign inclusions in the molten steel being involved, pollutes the molten steel, and inhibits the further improvement of the cleanliness of the molten steel; Excessive metal oxides in the drainage sand will chemically react with the elements in the molten steel, changing the element content in the molten steel, and in severe cases, the elements may exceed the standard; The oxides contained in the drainage sand will increase the oxygen potential of the top slag of the tundish, and then cause secondary oxidation of the molten steel. For example, the patent No. is CN201320196647: "Large Drainage Sand Removal Device". The overflow tank is set on the lower side of the drainage tank. There are two argon sealing tubes, which are respectively located on both sides of the impact area of the ladle. For the drainage sand, turn on the argon gas to blow and atomize the drainage sand at each pouring and bag change, and then finally introduce it into the overflow tank from the drainage tank; the utility model patent device is relatively complicated, and the setting of the drainage tank and the argon sealing tube The occupied space is not conducive to on-site operations, and secondly, the drainage sand blown out by the argon seal will pollute the environment.

Utility model content

The purpose of this utility model is to provide a drainage sand drainage device, which adopts the scheme of pouring from the outside of the tundish, and through the drainage sand drainage device, the drainage sand flowing into the continuous casting tundish can be reduced. Before the pouring position on the top of the tundish, the drainage sand is discharged, thereby reducing the amount of drainage sand entering the tundish and improving the purity of molten steel.

In order to achieve the above purpose, the technical solution adopted by the utility model is, a device for draining drainage sand, including a ladle, a ladle turret, a motor drive mechanism, a T-shaped tundish, a storage tank and a rotary yoke, the ladle turret It is arranged directly in front of the T-shaped head of the T-shaped tundish. The rotary yoke is rotatably connected to the ladle turret, and the ladle is placed on the ladle clamping part at the front end of the rotary yoke. The rotary yoke Driven by a motor drive mechanism to rotate 360° on the ladle turntable, the storage tank is placed on the side of the T-shaped head of the T-shaped tundish, and the tank mouth of the storage tank and the pouring port of the T-shaped tundish impact area are located On the same circumference, the bottom of the ladle is provided with a sliding nozzle, and the sliding nozzle is provided with a sliding nozzle slider, and the sliding nozzle slider is driven and controlled by a hydraulic drive mechanism, and the opening ratio of the sliding nozzle slider is precisely controlled and the opening and closing fast.

As an improvement of the utility model, the included angle range between the center of the storage tank and the center of the ladle turret is 15°-90°.

As an improvement of the utility model, the included angle range between the center of the storage tank and the center of the ladle turret is 27°-33°.

As an improvement of the utility model, the angle range between the center of the storage tank and the center of the ladle turret is 30°.

As an improvement of the utility model, the yoke can rotate clockwise and/or counterclockwise on the ladle turret.

As an improvement of the utility model, the storage tank adopts a stainless steel tank or a cast iron tank.

As an improvement of the utility model, when the drainage sand is discharged into the storage tank, the opening of the sliding nozzle slide plate is set to 1/4-1/3 of its total opening.

As an improvement of the utility model, when the ladle rotates from the storage tank to the pouring position directly above the T-shaped tundish, a long nozzle is sleeved on the sliding nozzle, and the long nozzle extends into the T-shaped tundish. Inside the gate of the impact zone of the tundish.

Compared with the prior art, the utility model has the following advantages. On the basis of making full use of the existing continuous casting molten steel pouring equipment, this utility model places a stainless steel tube on the side of the T-shaped head of the T-shaped tundish. Or a cast iron storage tank, so that without any modification to the existing continuous casting molten steel pouring equipment, a drainage sand drainage device that can drain the drainage sand is formed. The structure is simple, easy to implement, and the cost is extremely low. About 3/4 of the drainage sand can be discharged into the storage tank first, effectively reducing the amount of drainage sand entering the T-shaped tundish without affecting the continuous casting efficiency, thereby avoiding SiO2, Cr2O3, etc. in the drainage sand Pollution of the molten steel in the tundish greatly improves the quality of the molten steel in the tundish and ensures the quality of the billet. In addition, the angle between the center of the storage tank and the center of the ladle turret is set to 30°. At this time, the storage tank is the best place to collect drainage sand, so as to ensure that the efficiency of molten steel pouring remains within the technical requirements of continuous casting . Using this draining sand drainage device can realize the external pouring scheme of continuous casting ladle. It is simple and convenient to operate, easy to use, and has high pouring efficiency. The probability of pouring ensures the quality of the slab.

Description of drawings

Fig. 1 is the structural representation of the utility model.

In the figure: 1-steel ladle, 2-T-shaped tundish, 3-steel ladle turret, 4-rotary yoke, 5-storage tank, 6-sliding nozzle.

detailed description

In order to deepen the understanding and recognition of the utility model, the utility model will be further described and introduced below in conjunction with the accompanying drawings.

Embodiment 1: As shown in Figure 1, a drainage sand drainage device includes a steel ladle, a T-shaped tundish, a ladle turret, a rotary yoke, a storage tank and a motor drive mechanism, and the ladle turret is set on a T-shaped tundish. In front of the T-shaped head of the tundish, the rotary yoke is rotatably connected to the ladle turret, and the ladle is placed on the ladle clamping part at the front end of the rotary yoke, and the rotary yoke is driven by a motor It is driven to rotate 360° on the ladle turret, and the motor drive mechanism uses a three-phase AC motor as a power source. The storage tank is placed on the side of the T-shaped head of the T-shaped tundish, and the mouth of the storage tank is located on the same circumference as the pouring port in the impact zone of the T-shaped tundish, so that the drainage sand can be conveniently discharged. The bottom of the ladle is provided with a sliding nozzle, and the sliding nozzle is provided with a sliding nozzle slide plate, and the sliding nozzle slide plate is driven and controlled by a hydraulic drive mechanism, and the hydraulic drive mechanism uses a hydraulic cylinder as a power source, so that the sliding nozzle slide plate The opening proportional control is precise and the opening and closing are rapid. The entire technical scheme is ingenious and practical in design, easy to implement, and low in production cost, effectively improving the quality of molten steel in the tundish and ensuring the quality of the cast slab.

Embodiment 2: As shown in Figure 1, as an improvement of the present utility model, the angle a between the center of the storage tank and the center of the ladle turret is in the range of 15°-90°. As long as the position of the storage tank is ensured that the sliding nozzle of the ladle can reach. The rest of the structures and advantages are exactly the same as in Embodiment 1.

Embodiment 3: As shown in Figure 1, as an improvement of the present invention, the angle a between the center of the storage tank and the center of the ladle turret is in the range of 27°-33°. In this embodiment, it is necessary to consider the effect of the operation of collecting and draining drainage sand in the storage tank on the pouring efficiency of the continuous casting ladle. Setting the storage tank as close as possible to the side of the T-shaped head of the T-shaped tundish can effectively ensure continuous casting The efficiency of ladle pouring is within the technical requirements. The rest of the structures and advantages are exactly the same as in Embodiment 2.

Embodiment 4: As shown in Figure 1, as an improvement of the present invention, the included angle a between the center of the storage tank and the center of the ladle turret is 30°. After a lot of tests, it can be seen that when the storage tank is placed at this position, it is the best position to collect drainage sand, which can not only ensure good pouring efficiency of continuous casting ladle pouring, but also facilitate the operation of operators and facilitate installation of continuous casting equipment. After shutting down, the storage tank containing the drainage sand will be hoisted away, and the drainage sand will be recycled. The rest of the structure and advantages are exactly the same as in Embodiment 3.

Embodiment 5: As shown in Fig. 1, as an improvement of the present utility model, the rotary yoke can rotate clockwise and/or counterclockwise on the ladle turret. Generally, the method of clockwise rotation is used to facilitate the pouring operation. The rest of the structures and advantages are exactly the same as in Embodiment 4.

Embodiment 6: As shown in Figure 1, as an improvement of the utility model, the storage tank is made of stainless steel tank or cast iron tank, which has a long service life and can effectively achieve the effect of collecting drainage sand. The rest of the structures and advantages are exactly the same as in Embodiment 5.

Embodiment 7: As shown in Figure 1, as an improvement of the utility model, when discharging drainage sand into the storage tank, the opening of the sliding nozzle slide plate is set to 1/4-1/3 of its total opening. 3. This can ensure that the flow of drainage sand is relatively uniform from beginning to end, and it is also convenient to control the flow rate of drainage sand in the later stage, ensuring that the stream flowing to the storage tank is all drainage sand, further reducing the probability of forced bare casting of ladles. The rest of the structures and advantages are exactly the same as in Embodiment 6.

Embodiment 8: As shown in Figure 1, as an improvement of the utility model, when the ladle rotates from the storage tank to the pouring position directly above the T-shaped tundish, a long nozzle is sleeved on the sliding nozzle , the shroud extends into the pouring gate of the impact zone of the T-shaped tundish. Setting the long nozzle can protect the molten steel in the T-shaped tundish, prevent the secondary oxidation of the molten steel in contact with the air, and reduce the possibility that the molten steel poured from the ladle will be entangled with slag in the impact area of the T-shaped tundish and affect the purity of the molten steel . All the other structures and advantages are exactly the same as those in Embodiment 7.

The method for opening the continuous casting ladle by using the above-mentioned drainage sand drainage device includes the following steps:

(1) Fix the ladle on the ladle clamping part at the front end of the rotary yoke, rotate the rotary yoke clockwise until the sliding nozzle at the bottom of the ladle is located directly above the mouth of the storage tank; in practical application, A ±3° deviation from directly above the storage tank mouth is also acceptable.

(2) Slowly open the sliding nozzle slide plate to 1/4-1/3 opening, so that the drainage sand in the ladle flows into the storage tank through the sliding nozzle;

(3) Wait for the drainage sand to flow out to 3/4-4/5 of the total drainage sand, and when the color of the drainage sand stream gradually changes from black to red, immediately close the sliding nozzle slide plate; the action of closing the sliding nozzle slide plate It should be done quickly to prevent the molten steel from flowing into the storage tank, causing the ladle to be forced to pour bare.

(4) Continue to rotate the rotary yoke clockwise until the sliding nozzle at the bottom of the ladle is located directly above the pouring position of the T-shaped tundish and stop. A shroud is socketed on the sliding nozzle and let the long nozzle extend into the T-shaped tundish. Inside the sprue of the impact zone of the tundish; to avoid the secondary oxidation and slag entrainment of the molten steel and affect the purity of the molten steel.

(5) Open the sliding nozzle slide plate to the total opening and pour the molten steel in the ladle into the T-shaped tundish.

The utility model can also combine at least one of the technical features described in embodiments 2, 3, 4, 5, 6, 7, and 8 with embodiment 1 to form a new embodiment.

The technical means disclosed in the solution of the utility model are not limited to the technical means disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be pointed out that for those skilled in the art, some improvements and modifications can be made without departing from the principle of the utility model, and these improvements and modifications are also regarded as the protection scope of the utility model.

Claims (8)

1. the outer arranging device of a kind of stuffing sand, it is characterised in that：Including ladle, ladle turret, motor-driven mechanism, T-shaped centre Bag, storage tank and revolution yoke, the ladle turret are arranged on the T connector portion front of T-shaped tundish, the revolution yoke Rotatably it is connected on ladle turret, the ladle is placed on the ladle clamping part of revolution yoke leading section, the revolution Yoke is driven by motor-driven mechanism carries out 360 ° of rotations on ladle turret, and the storage tank is placed on T-shaped tundish T connector portion side, the tank mouth of the storage tank and T-shaped tundish impact area sprue gate be located on same circumference, the steel The bottom of bag is provided with slide gate nozzle, and the slide gate nozzle is provided with sliding gate slide board, and the sliding gate slide board uses hydraulic pressure Drive mechanism is driven control.

2. the outer arranging device of a kind of stuffing sand as claimed in claim 1, it is characterised in that the center of the storage tank is returned with ladle The angular range of turntable center is 15 ° -90 °.

3. the outer arranging device of a kind of stuffing sand as claimed in claim 2, it is characterised in that the center of the storage tank is returned with ladle The angular range of turntable center is 27 ° -33 °.

4. the outer arranging device of a kind of stuffing sand as claimed in claim 3, it is characterised in that the center of the storage tank is returned with ladle The angular range of turntable center is 30 °.

5. the outer arranging device of a kind of stuffing sand as claimed in claim 4, it is characterised in that the revolution yoke is in ladle turret On can clockwise and/or rotate counterclockwise.

6. the outer arranging device of a kind of stuffing sand as claimed in claim 5, it is characterised in that the storage tank using stainless cylinder of steel or Cast-iron pot.

7. the outer arranging device of a kind of stuffing sand as claimed in claim 6, it is characterised in that stuffing sand is discharged in storage tank When, the aperture of the sliding gate slide board is set to the 1/4-1/3 of its total aperture.

8. the outer arranging device of a kind of stuffing sand as claimed in claim 7, it is characterised in that the ladle is rotating from storage tank When pouring into a mould position to the surface of T-shaped tundish, a long nozzle is socketed on the slide gate nozzle, the long nozzle stretches to T-shaped Inside the impact zone sprue gate of tundish.