KR101236123B1

KR101236123B1 - Cooling And Transferring Apparatus For Continuous Casting Metal

Info

Publication number: KR101236123B1
Application number: KR1020100094660A
Authority: KR
Inventors: 문준혁; 임석영
Original assignee: 현대제철 주식회사
Priority date: 2010-09-29
Filing date: 2010-09-29
Publication date: 2013-02-21
Also published as: KR20120033062A

Abstract

The present invention relates to a cooling stand structure for a continuous casting device, the cooling fluid is disposed on the lower side of the mold of the continuous casting device and cooling the temperature in the cooling stand chamber is disposed inside the cooling stand for cooling while transporting the slab discharged from the mold By controlling the cooling fluid injected from the injection device to prevent the roller deterioration of the cooling stand to prevent accidental cast failure, such as scratches on the surface of the cast by the roller damage due to degradation, thereby increasing the quality and productivity of the cast.

Description

Cooling stand structure for continuous casting device {Cooling And Transferring Apparatus For Continuous Casting Metal}

The present invention relates to a cooling stand structure for a continuous casting device, and more particularly, to control the temperature in the chamber in which the cooling stand of the continuous casting device is disposed.

In general, the continuous casting device is a device for continuously manufacturing molten steel dissolved in a steelmaking furnace such as an electric furnace through a mold such as slab or bloom, billet, etc. used during hot rolling.

An object of the present invention is to provide a cooling stand structure for a continuous casting device that can control the temperature in the chamber in which the secondary cooling stand of the continuous casting device is disposed.

This object of the present invention is disposed on the lower side of the mold passing molten steel passed from the tundish and the cooling table including a plurality of spaced apart rolls to convey the cast slab is first cooled in the mold surface;

A coolant spray device for spraying coolant onto the cast steel conveyed through the cooler;

A cooling table chamber in which the cooling table is disposed;

It is solved by providing a cooling stand structure for a continuous casting device, including a cooling fluid injection device for controlling a temperature in the cooling stand chamber by injecting a cooling fluid into the cooling stand chamber.

The cooling zone chamber is provided with a discharge port for discharging the steam therein, the discharge port is characterized in that the blower for discharging the air in the cooling table chamber is mounted.

The cooling fluid injection device is characterized in that it comprises a fluid injection nozzle for injecting a cooling fluid in the cooling chamber, and a fluid supply for supplying a cooling fluid to the fluid injection nozzle.

The fluid injection nozzle is characterized in that for injecting cooling fluid to the outside of the roll.

The fluid injection nozzle is characterized in that the wide-angle injection nozzle for injecting the cooling fluid at a wide angle.

A temperature sensor for sensing a temperature in the cooling chamber, and a control unit connected to the temperature sensor and the cooling fluid injection device and controlling the operation of the cooling fluid injection device with a signal received from the temperature detection sensor. It is characterized by including.

And a control unit for controlling the operation of the blower by a humidity sensor for sensing humidity in the cooling zone chamber, the humidity sensor and the blower, and a signal received from the humidity sensor. .

The present invention is to prevent the roller deterioration of the cooling stand to prevent accidental cast failure, such as scratches on the surface of the slab by roller damage due to deterioration, there is an effect of increasing the quality and productivity of the cast.

1 is a schematic diagram showing the structure of the present invention
2 is a schematic diagram showing a comparative example of the present invention;

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Hereinafter, as shown in FIG. 1, the continuous casting apparatus includes a tundish 1 for receiving and storing molten steel from a ladle;

A mold (2) for cooling the molten steel exiting from the tundish (1) for the first time to form a slab (3) whose surface is solidified;

A cooling table 10 in which a pair of rolls 11 supporting both sides of the cast piece 3 discharged from the mold 2 are spaced apart from each other;

It includes a cooling water injection device 20 for injecting the cooling water to the cast (3) conveyed through the cooling table (10).

The cooling table 10 has a vertical conveying part for conveying the slab 3 discharged from the mold 2 in the vertical direction, a horizontal conveying part for conveying the slab 3 in the horizontal direction, and the vertical conveying part having an arc shape. And an arc transfer unit connecting the horizontal transfer unit.

The cooling stand 10 structure for a continuous casting apparatus of the present invention includes the cooling stand 10 and the cooling stand chamber 30 in which the cooling stand 10 is disposed.

The coolant spray device 20 is disposed in the coolant chamber 30 and a coolant spray nozzle 21 for spraying coolant between the rolls 11 to cool the slab 3;

It includes a cooling water supply unit 22 for supplying cooling water to the cooling water injection nozzle (21).

The cooling zone chamber 30 has a box-shaped body surrounding the cooling zone 10 to block the cast 3 being cooled through the cooling zone 10 from being influenced by external factors.

That is, the cooling stand chamber 30 is the quality of the cooling stand 10 is placed inside the cooling conditions of the slab (3) is changed or the foreign matter is attached to the surface of the slab (3), or the quality generated It is to prevent degradation.

The cooling zone chamber 30 is sealed in a state where the cooling zone 10 and the cooling water injection nozzle 21 are disposed therein, and a discharge port 31 for discharging water vapor in the chamber is provided.

The present invention includes a blower (50) mounted to the discharge port (31) for discharging air in the cooling chamber (30).

The blower 50 discharges water vapor generated in the cooler chamber 30 and cools it with the roll shaft of the roll 11 and the roll 11 by moisture in the cooler chamber 30. 10) It is to prevent each structure constituting the corrosion from being damaged by water.

On the other hand, the cooling zone chamber 30 is a closed structure other than the ventilation structure through the outlet 31, the heat discharge capacity is lowered in the summer, the internal temperature is increased.

When the temperature in the cooling zone chamber 30 rises, the roll 11 may be deteriorated, and the roll 11 may not be driven due to the deterioration.

The roll 11 rotates while contacting the slab 3 discharged from the mold 2 to guide the slab 3 continuously and smoothly. When the roll 11 does not rotate due to deterioration as described above, By the friction between the surface of the slab 3 and the outer circumferential surface of the roll 11, the scale and the powder layer of the mold 2 attached to the surface of the slab 3 adhere to the outer circumferential surface of the roll 11 and gradually accumulate.

The scale and the powder layer of the mold 2 attached to the outer circumferential surface of the roll 11 are gradually accumulated on the outer circumferential surface of the roll 11 as described above, and thus, the accumulated mass has a layered shape, which is a black stone. (4) It is called (Black Stone).

The roll 11 in which the black stone 4 is generated has a black color due to the deterioration of the outer circumferential surface area where the black stone 4 is generated, and the roll shaft and the spiral bush inside the roll 11 are also deteriorated, thereby lubricating (grease). Is stuck.

As described above, when the black stone 4 occurs on the outer circumferential surface of the roll 11, the surface of the cast 3 is scratched by the black stone 4, and in severe cases, The depth of the grooves scratched on the surface may be 10 mm or more, which greatly reduces the quality of the cast 3.

In addition, the slab (3) has a problem in that the surface of the surface scratches are very severe when the grooves as described above, so if the rolling as it is, the risk of operation accident during rolling and the quality of the rolled product is also greatly reduced.

As described above, the slab 3 damaged on the surface had a problem of being used in a rolling process after smoothing the surface through a separate surface treatment process (scarping process).

In addition, as described above, when the black stone 4 is generated, the mold 2 level hunting phenomenon occurs, and the inflow of the mold 2 powder into the mold 2 becomes uneven, and the surface solidification of the cast 3 is prevented. The non-uniformity causes frequent cracks on the surface of the cast 3, which greatly reduces the quality of the cast 3.

As described above, if the solidification of the cast 3 is uneven, the operation is stopped due to the break out of the cast 3 when transferring the cast 3 to the cooling table 10, the risk of a large accident There is this.

Therefore, as described above, when the black stone 4 is generated on the surface of the roll 11, the continuous casting operation is stopped, and the maintenance work of replacing the roll 11 should be performed.

Thereby, productivity falls at the time of continuous casting.

The present invention includes a cooling fluid injector 40 for controlling a temperature in the cooling chamber 30 by injecting cooling fluid into the cooling chamber 30.

The cooling fluid injection device 40 is disposed on the upper side in the cooling table chamber 30, and is spaced apart from the roll 11 to inject a cooling fluid to the outside of the roll 11. )and,

And a fluid supply part 42 for supplying cooling fluid to the fluid injection nozzle 41.

The fluid injection nozzle 41 injects a cooling fluid to the outside of the roll 11 to lower only the atmospheric temperature, that is, the ambient temperature in the cooling zone chamber 30.

This is to prevent the fluid injection nozzle 41 from being directly injected into the cast 3 to affect the cooling of the cast 3 to change the properties of the cast 3 and to deteriorate the quality of the cast 3. .

In addition, the fluid jet nozzle 41 is a wide-angle jet nozzle for injecting cooling fluid at a wide angle. The fluid jet nozzle 41 is directly injected onto the slab 3 to affect the cooling of the slab 3, thereby causing the slab (3) to flow. It is preferable to change the properties of the metal and prevent the degradation of the quality of the cast 3.

The cooling fluid is an example of using a cooling water, and it is noted that any fluid capable of lowering the atmospheric temperature in the cooling chamber 30 may be used.

The cooling fluid injector 40 lowers the atmospheric temperature in the cooling chamber 30 so as to prevent deterioration damage of the roll 11 caused by increasing the atmospheric temperature in the cooling chamber 30 in the summer.

That is, the cooling fluid injection device 40 is to prevent the black stone 4 from adhering to and stacking on the surface of the roll 11 by preventing the roll 11 from being deteriorated and not rotated. .

On the other hand, the present invention is a temperature sensor 60 for sensing the temperature in the cooling chamber chamber 30, the cooling fluid injection device 40 is connected to the signal received from the temperature sensor 60 to the It is preferable to further include a control unit 70 for controlling the operation of the cooling fluid injection device (40).

The temperature sensor 60 detects a temperature in the cooling zone chamber 30, and the controller 70 has a temperature higher than a predetermined temperature at which the roll 11 deteriorates the temperature received from the temperature sensor 60. If it is to operate the cooling fluid injection device 40.

In addition, the fluid injection nozzle 41 of the cooling fluid injection device 40 uses the wide-angle injection nozzle to cool the cooling fluid, that is, the coolant, so that the cooling fluid does not come into contact with the slab 3 being transported along the cooling table 10. It spreads widely in the large chamber 30, and sprays and lowers only the atmospheric temperature, ie, the atmospheric temperature, in the cooling chamber 30.

Therefore, the roll 11 in the cooling zone chamber 30 is automatically controlled to prevent the roll 11 from being damaged by deterioration and non-rotation.

In addition, the present invention further comprises a humidity sensor 80 for sensing the humidity in the cooling chamber chamber 30 and connected to the control unit 70,

The controller 70 is connected to the blower 50 and controls the operation of the blower 50 by a signal received from the humidity sensor 80.

When cooling water is injected from the cooling fluid injection device 40 to lower the atmospheric temperature of the cooling zone chamber 30, the humidity in the cooling zone chamber 30 is greatly increased, thereby causing corrosion of the roll 11 by moisture. Or increased risk of damage.

The control unit 70 receives the humidity in the cooling chamber 30 through the humidity sensor 80, and when the humidity is more than a predetermined amount to increase the fan rotation speed of the blower 50 to increase the blowing capacity will be.

In addition, the blower 50 is an example that can control the blowing capacity in multiple stages.

In addition, the cooling zone chamber 30 includes a plurality of outlets 31, and each of the plurality of blowers 50 includes a plurality of blowers 50, and includes a plurality of blowers 50. 50 may be connected to the control unit 70, and the control unit 70 may selectively operate the plurality of blowers 50 to control the blowing capacity.

The present invention increases the life of the roll 11 by adjusting the temperature and humidity in the cooling zone chamber 30 as described above, and uniformly prevents the quality of the cast 3 by preventing the surface damage of the roll 11. It is to keep it and to maintain the continuous casting operation stably.

The present invention is not limited to the above-described embodiments, and various changes can be made without departing from the gist of the present invention, which is understood to be included in the configuration of the present invention.

10: cooling stand 11: roll
20: coolant injection device 30: cooling chamber
40: cooling fluid injection device 50: blower
60: temperature detection sensor 70: control unit
80: humidity detection sensor

Claims

A cooling table disposed on a lower side of the mold through which molten steel pulled out of the tundish is passed, and includes a plurality of rolls spaced apart from each other to convey the cast slab solidified on the surface;
A coolant spray device for spraying coolant onto the cast steel conveyed through the cooler;
A cooling table chamber in which the cooling table is disposed;
A cooling fluid injection device for controlling a temperature in the cooling zone chamber by injecting a cooling fluid into the cooling zone chamber,
The cooling fluid injection device,
A fluid injection nozzle for injecting cooling fluid in the cooling chamber;
A fluid supply unit for supplying a cooling fluid to the fluid injection nozzle,
The fluid injection nozzle is a cooling structure for a continuous casting apparatus, characterized in that for cooling the cooling fluid to the outside of the roll to lower the atmospheric temperature in the cooling chamber.

The method according to claim 1,
The cooling zone chamber is provided with a discharge port for discharging the steam therein,
Cooling stand structure for a continuous casting device, characterized in that the outlet is equipped with a blower for discharging the air in the cooling chamber.

delete

The method according to claim 1,
The fluid ejection nozzle is a cooling table structure for a continuous casting device, characterized in that the wide-angle injection nozzle for injecting the cooling fluid at a wide angle.

The method according to claim 1,
A temperature sensor for sensing a temperature in the cooling chamber;
And a control unit connected to the temperature sensor and the cooling fluid injection device to control the operation of the cooling fluid injection device with a signal received from the temperature detection sensor.

The method according to claim 2,
A humidity sensor for sensing humidity in the cooling chamber;
And a control unit connected to the humidity sensor and the blower and controlling the operation of the blower as a signal received from the humidity sensor.