KR20020052865A - Device for inserting powder in mold for continuous casting plant - Google Patents

Abstract

PURPOSE: A device for injecting powder into mold for a continuous casting machine is provided in which powder is uniformly injected into the mold by vibration of the mold, and powder is completely dried during injection process of powder. CONSTITUTION: The device for injecting powder into mold for a continuous casting machine comprises a powder injection part comprising a housing(10) fixed onto the upper part of the mold, an inner pipe(11) penetrating the central part of the housing(10) so that a submerged nozzle of a tundish is inserted and guided into the mold, an outer can(12) surrounding the outer circumferential surface of the inner pipe(11) inside the housing(10) with the outer can(12) being spaced apart from the housing(10) in a certain distance, powder inlet pipes(13) connected from the outer side of the housing(10) to upper both side surfaces of the outer can(12), hoppers(14) connected to the front of the inlet pipes(13) extended to the outer side of the housing(10) to receive powder injected from a powder tank, and a powder injection hole(15) formed on the lower part of the inner pipe(11) to inject powder into the mold; and a powder drying part drying powder injected into the mold(130) and comprising a blade plate(20) which is installed between the outer can(12) and the inner pipe(11) and inclined downward so that powder injected through the inlet pipes(13) is guided and flown down along the blade plate(20), a gas ring adhered onto the bottom of the inner pipe(11), a gas jet nozzle arranged along the gas ring and connected to the inside of the inner pipe(11), and a supply hose(23) connected to one side of the gas ring through the inner part of the housing to supply gas into the inner side of the inner pipe.

Description

Device for inserting powder in mold for continuous casting plant

The present invention relates to a mold of a continuous casting machine, and more particularly, to a powder input device for drying and mechanically injecting the powder injected into the mold.

In general, continuous casting equipment is a facility that continuously produces slabs of a certain size by receiving molten steel produced in a steelmaking furnace and transferred to ladles and then supplied to a mold.

The equipment is composed of a ladle containing refined molten steel in the steelmaking process, a ladle turret supporting the ladle, and a tundish and a tundish which temporarily store molten steel from the ladle and distribute the molten steel to each strand. Water cooling mold that initially solidifies injected molten steel into a certain shape, secondary cooling table consisting of rolls and spray nozzles that can bend or straighten the casting while removing heat from the non-solidified slabs, and slab cutting device and cast steel Consists of a feed roller table, a cooling yard and a slab surface grinding device.

While the mold is subjected to vertical movement in conjunction with the rotation of the pinch roll, powder is injected to prevent contact between the molten steel and the atmosphere and to prevent the molten steel from adhering to the mold.

That is, since stainless steel has a very high affinity with oxygen in the atmosphere, even if a tight sealing is normally carried out a small amount of inclusions, it is prevented by putting the powder as described above.

The mold powder is manually put by a worker through a separate drying device. In the related art, mold drying and feeding are not performed properly, so that the mold powder is absorbed (reacted) with moisture in the air on the mold bath surface and is present in a small amount of lumps. Since the adsorption slab is pulled out together with the copper plate of a mold, there exists a problem which causes the molten steel leakage (blackout phenomenon) by iron positive pressure.

Accordingly, the present invention has been made to solve the above problems, to provide a powder injection device of the player mold which is such that the powder is mechanically uniformly injected by the vibration of the mold and the powder can be completely dried in the loading process. There is a purpose.

1 is a view showing a state in which the powder injection device according to the invention installed in the mold machine,

Figure 2 is a partially cut perspective view showing a powder injection device of the player mold according to the present invention,

3 is a view showing an operating state of the powder input device according to the present invention.

Explanation of symbols on the main parts of the drawings

10 housing 11 inner tube

12: outer tube 13: inlet pipe

14 hopper 15: injection hole

20: blade plate 21: gas ring

22: injection nozzle 23: supply hose

In order to achieve the object as described above, the present invention, a powder input unit for sprinkling a predetermined amount of powder supplied from the powder tank of the tundish is installed on the mold of the continuous casting equipment into the mold, and the powder is injected into the mold It comprises a powder drying unit for drying the.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a view showing a state in which the powder injection device according to the invention installed in the player mold, Figure 2 is a partially cutaway perspective view showing a powder injection device of the player mold according to the present invention, Figure 3 according to the present invention It is a view showing the operating state of the powder input device.

According to the above drawings, the continuous casting equipment is supplied with a molten steel from the ladle 100 containing the molten steel refined in the steelmaking process temporarily stored in the molten steel and distributed to each strand, and tundish Water cooling mold 130 for initial solidifying the molten steel injected in the 110 in a predetermined shape, secondary cooling stand consisting of a roll and a spray nozzle which can take or straighten the cast while completing the solidification by taking heat from the unsolidified cast It is made, including.

In the present invention, in the continuous casting facility of the above-mentioned solid, powder is supplied from the powder supply powder tank 120 is installed on the mold 130, the lower portion of the tundish 110 is installed in the tundish 110, It comprises a powder input unit for sprinkling the inside of the mold 130 by a predetermined amount, and a powder drying unit for drying the powder during the powder input unit.

The inlet is a housing 10 fixedly installed on the mold 130 and an inner tube through which the immersion nozzle 121 of the tundish 110 is inserted into the mold 130 and guided through the housing 10. (11), the outer tube 12 is installed to surround the outer circumferential surface of the inner tube 11 at a predetermined interval inside the housing 10, the powder inlet tube 13 is connected to the upper both sides of the outer cylinder 12 from the housing 10 outside ), The hopper 14 for receiving powder from the powder tank 120 and installed at the tip of the inlet pipe 13 extending outward of the housing 10 and formed at the bottom of the inner tube 11 to mold the powder 130 includes a powder input hole 15 for introducing into the interior.

The powder tank 120 installed in the tundish 110 has discharge pipes 121 installed at both sides thereof, and when the tundish 110 is moved to the upper working position of the mold 130, the powder tank 120 protrudes from both sides of the housing 10. As each discharge pipe 121 is positioned on the hopper 14, the powder can be accurately injected into the hopper 14.

In this embodiment, the center portion of the housing 10 is cut and divided into two for the convenience of installation. Therefore, the inner tube 11 and the outer cylinder 12 installed in each housing 10 also have a semicircular shape, and when the two members are fixed to the upper mold 130 by engaging two members, they become a cylindrical shape and are tundish ( The immersion nozzle 121 of 110 may be inserted.

On the other hand, the drying unit is installed between the outer cylinder 12 and the inner tube 11 and the blade plate 20 and the inner tube 11 inclined downward so that the powder introduced through the inlet tube 13 is guided and flows down Gas ring 21 attached to the bottom surface, the gas injection nozzle 22 is arranged along the gas ring 21 connected to the inner tube 11, the gas ring 21 through one side of the housing 10 It is connected to the inner tube 11 includes a supply hose 23 for supplying a gas inside.

Here, the blade plate 20 is installed in each of the two housings 10 separated into two to guide the powder introduced through each inlet pipe 13 to the input hole 15 of the inner tube 11, respectively, The zigzag form a staggered structure, the powder is configured to pass through each blade plate 20 plate in sequence.

And the blade plate 20 is located at the bottom of the plate is connected to the end of the lower end of the input hole 15 of the inner tube 11 to finally guide the powder to the input tube.

Hereinafter will be described the operation of the present invention.

Before moving the tundish 110 to the casting position, assembling and installing two separate housings 10 on the mold 130.

When the installation of the housing 10 is completed, the tundish car 111 is moved to move the tundish 110 to the casting position, and when the tundish 110 is lowered, the immersion nozzle 121 installed on the bottom of the tundish 110. ) Is inserted along the inner tube 11 installed in the housing 10 to be deposited into the mold 130.

And both the discharge pipe 121 of the powder tank 120 mounted on the tundish 110 is located on the upper side of the hopper 14 that protrudes to both sides of the housing 10 so that the powder can be introduced into the hopper 14 Will be.

When the powder in the powder tank 120 is introduced into the hopper 14 and simultaneously opens the solenoid valve installed at one side of the gas supply hose 23 to supply gas, the gas is connected to the supply hose 23. 21 is injected into the inside and the inside through the injection nozzle 22 installed along the gas ring 21, the injected gas is ignited by the flame by the immersion nozzle 121 is preheated to a high temperature to the inner tube ( 11) The interior is heated.

In addition, the ignited flame is continuously generated between the immersion nozzle 121 and the inner tube 11, as shown in FIG. 3, in addition to the heating of the inner tube 11, the inner tube 11 and the immersion nozzle 121. An additional action of maintaining the airtightness between them is to further block outside air from penetrating into the mold 130.

On the other hand, the powder injected into the hopper 14 is moved through the inlet pipe 13 connected to the hopper 14 is introduced between the outer cylinder 12 and the inner tube 11, the outer cylinder (in accordance with the vertical vibration of the mold 130) 12) and each blade plate 20 installed between the inner tube 11 is sequentially flowed down to be introduced into the mold 130 through the input hole 15 formed on the bottom surface of the inner tube 11.

That is, the mold 130 is vibrated in the vertical direction to prevent the molten steel discharge and the fixing of the mold 130 of the molten steel, the vibration of the mold 130 is transmitted to the housing 10 installed on the mold 130 as it is To vibrate the housing 10, and the powder introduced through the inlet pipe 13 falls on the upper blade plate 20 and then follows the blade plate 20 which is inclined downward according to the vibration of the mold 130. It is to be lowered to the plate 20 slowly.

In this process, the powder moved along the blade plate 20 by the inner tube 11 and the blade plate 20 which are already heated by the gas flame can be heated and dried.

The powder is sequentially lowered down through the next blade plate positioned below the blade plate 20, and finally, through the injection hole 15 of the inner tube 11 located at the end of the last blade plate 20, the mold ( 130) It will be put into the inside.

In this way, by slowly moving the powder along the inner surface of the inner tube 11, the powder can be sufficiently dried, and the dosage of the powder can also be kept constant.

According to the powder input device of the player mold according to the present invention as described above, by sufficiently drying the mold powder while maintaining the airtightness of the molder, there is an effect that can prevent accidents such as blackout due to undried powder input.

In addition, there is an advantage that can be given the manpower and time required to put powder.

Claims (2)

A housing fixedly installed on the upper part of the mold, an inner tube through which the immersion nozzle of the tundish is inserted into the mold and guided into the mold, an outer cylinder installed around the outer circumferential surface of the housing at a predetermined interval, and an outer cylinder from the outside of the housing Powder inlet pipe connected to both sides of the upper side, a hopper connected to the tip of the inlet pipe extending to the outside of the housing and receiving powder from the powder tank, and powder input for forming the powder into the mold formed at the bottom of the inner tube. A powder input part including a hole; It is installed between the outer cylinder and the inner tube and the powder plate introduced through the inlet pipe is guided and flowed downward, and arranged along the gas ring and gas ring attached to the bottom of the inner tube and connected to the inner tube. A powder drying unit for drying the powder injected into the mold, including a gas injection nozzle to be connected to one side of the gas ring through the inside of the housing and a supply hose for supplying gas into the inner tube. Powder input device of the player mold comprising a. According to claim 1, The blade plate is a plurality of zigzag staggered mutually installed along the vertical direction so that the powder is passed through each blade plate plate, characterized in that the powder mold apparatus of the player mold.