KR19980036156U - Melt leakage prevention device of converter steel outlet - Google Patents

Abstract

The present invention is a slopping and bubbling phenomenon (melt flows out of the converter) which is inevitably generated during the oxidation operation in the converter furnace during the blowing operation in which the oxygen is blown into the converter furnace containing the molten iron. Overflow or boiling), the converter outlet to prevent melts such as slag and molten steel or flames containing toxic exhaust gases from flowing out of the converter through the outlet. It relates to a melt outflow prevention device.

The present invention, the hopper supply unit for storing the secondary raw material is a solid raw material; An input device unit which receives subsidiary material from the hopper supply unit and inputs it to the tap hole; A turning device unit which transmits power to the input device and supports the weight and moves the input unit; A purge unit for preventing the discharge of flames and dust (dust); consisting of a melt flow prevention device of the tapping outlet during the drilling, the feeder (feeder) for discharging the raw material by the electric shaking force at a position higher than the tap opening position Install the attached sub-material storage hopper, the dosing unit is equipped with an input pipe and the discharge pipe on the tap and the horizontal line, the input device attached to the support is connected in a chain with a forward and reverse motor that provides rotational force in the forward or reverse direction And it provides a device for preventing the leakage of the melt to the tap hole during the converter blower is installed in the purge line (purge line) to be external to the inlet pipe.

Description

Melt leakage prevention device of converter steel ball.

The present invention relates to a converter for refining molten iron into molten steel, and more specifically, in a furnace in which oxygen is blown through an oxygen lance in a converter furnace containing molten iron, a slew inevitably generated during an oxidation reaction in the furnace. Due to the slopping and bubbling phenomenon (melt overflows or boils out of the converter), melts such as slag and molten steel, or flames containing toxic exhaust gases are transferred to the converter outlet during the converter drilling operation. It relates to a melt outflow prevention device of the converter exit for preventing the outflow of the converter through the sphere.

In general, the working process of the converter for refining the molten iron to molten steel is a charging process for charging the molten iron and scrap iron from the blast furnace into the furnace as shown in Figure 1, and oxygen in the converter through the oxygen lance (4) Slag pot (slag), a by-product produced in the process of blowing the molten steel from the furnace to the molten steel in the furnace, and the refining of the molten iron to the molten steel. It consists of an exclusion process that is excluded from.

Dust, including flue-gases generated during this series of converter refining operations, is shown in FIG. 1 through the ducts driven by the suction force of the forced manned blower 10, and the dust collector 9 and the gas. It is sent to the holder 12 and these by-products (slag or gas) are being recycled.

For reference, the tilting of the converter is performed when the main switch 123 shown in FIG. 2 is operated left and right so that the converter driving motor 113 is driven so that the converter 1 is tilted clockwise or counterclockwise. I am supposed to lose.

The prior art according to the present invention is mentioned in the blowdown work process of charging molten iron and scrap metal in the furnace (1) furnace during the series of converter work process, conventionally the converter outlet during the blowdown work of the converter Since there is no special device for closing (5), the amount of exhaust gas increases during the intense oxidation and decarburization reaction in the converter, so that the exhaust gas generated during the blowdown cannot be discharged to the entire dust collection line, and some of the dust including the melt 14 There is a case of spilling out through the exit 5 together with the dust.

This shortens the life of the tapping hole 5 due to the oxidative factor of the converter tapping hole 5 and causes a fatal safety accident to the worker passing the tapping side deck, or around the taping area 5. It causes ignition of the surrounding flammables such as thermal deformation and trouble of the equipment installed in the facility, and it is a major factor that causes a fire.When placing the classmates in the standby position to perform the tapping work directly below the converter, The melt containing the slag eluted from (5) enters the water ladles, which in turn causes a poor quality of the molten steel.

The present invention was devised to fire the above-mentioned conventional problems, to prevent the melt including slag into the tap opening during the converter drilling to improve the quality of the molten steel, to prevent equipment accidents and human injury, The purpose of the present invention is to provide an apparatus for preventing melt flow of the converter steel outlet which can improve the work efficiency and promote the convenience of the operator to achieve a stable blow operation.

1 is an overall configuration diagram showing a flue gas dust collector of a converter;

2 is a block diagram showing a tilting device of a converter;

3 is a block diagram showing a melt ejection state of the exit port in a conventional converter;

Figure 4 is a block diagram showing a melt leakage preventing device of the converter steel ball according to the present invention,

5 is an operating state of the melt outflow prevention device of the converter steel ball according to the present invention.

* Description of the symbols for the main parts of the drawings *

1 ... Converter 4 ... Oxygen lance

5 ... taping mouth 10 ... forced blower

12 Gas holder 50 ...

52 ... spring 53 ... flange

54.Input pipe 55 ... Inlet

57 Screw screw 64 b Forward, reverse motor

65 ... support 68 ... chain

71 Storage Hopper 72 Solid Material

In order to achieve the above object, the present invention, in the melt leakage prevention device of the converter steel ball, a hopper supply unit for storing the secondary raw material as a solid raw material; An input device unit which receives subsidiary material from the hopper supply unit and inputs a tap hole; A turning device unit which transmits power to the input device and supports the weight and moves the input unit; A purge unit for preventing the discharge of flames and dust (dust); consisting of a melt flow prevention device of the tapping outlet during the drilling, the feeder (feeder) for discharging the raw material by the electric shaking force at a position higher than the tap opening position The subsidiary material storage hopper is installed, and the input device part has an input pipe, a discharge pipe, an inlet port, a spring and a screw screw shaft on the tap hole and a horizontal line, and the input pipe of the input device part includes a motor for providing rotational force. It is installed on the upper plate of the support with horizontal height, and the input device attached to the support is connected to the forward and reverse motor which provides rotational force in the forward or reverse direction, and is connected to the input pipe and discharges the flame and dust from the outlet through the external opening. Providing a melt leakage prevention device to the tap hole during the converter drilling, characterized in that the purge line (purge line) is installed to prevent the By

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

Melt outflow prevention device 100 of the converter outlet according to the present invention is a feeder (62) for discharging the raw material with the electric shaking force at a position higher than the outlet 5, as shown in FIG. The attached sub-material storage hopper 71 is installed, and the inlet pipe 54 and the ejection pipe 51, the inlet port 55, the spring 52, and the screw shaft 57 of the screw on the tap hole 5 and the horizontal line. The input device unit 50 is configured to be installed, the input tube 54 of the input device unit 50 is installed on the upper plate of the support (65) with a horizontal height and the motor (moter) 64a to provide a rotational force do. In addition, the input device unit 50 attached to the support 65 is connected to the energizing motor 64b and the chain 68 to provide a rotational force in the forward or reverse direction, the flame and the outside to the input pipe 54 A purge line 59 is installed to prevent the release of dust.

In the feeding device unit 50, a screw shaft 57 of a screw is supported and built into the feeding pipe 54 by two bearings 56 of one front tube portion 54a and two rear tube portions 54c. The tube 54 is designed such that the center of gravity is placed on the rear tube 54c. The discharge pipe 51 is inserted into the front tube portion 54a of the input tube 54 fluidly, and an inlet 55 for receiving an auxiliary material from the storage hopper 71 is installed in the middle of the input tube 54. In addition, a proximity limit 61b and a striker 61a are attached to the inlet 55 and the lower end of the feeder box 60 of the storage hopper 71, and the tension spring 52 is attached to the body 51b of the discharge pipe 51. It is provided to be fixed to the flange 53 and the ejection pipe 51 head part of this injection pipe 54.

In addition, a purge part 70 is disposed to prevent flame and dust discharge from the tapping hole 5 so as to be external to the inlet pipe 54, and the nitrogen purge pipe 59 and the nozzle 59a are installed. The second half of the pipe 59 is composed of a flex ball hose.

On the other hand, the support 65 is a forward that provides rotational force in the forward direction and the reverse direction. It is connected to the swing device 60 composed of the reverse motor (64b) and the chain 68, the power and the input pipe to the feeder (62) which provides the electric shaking force of the storage hopper 71 The drive motor 64a for providing the rotational force to the screw screw shaft 57 in the 54 is provided with an electrical switch 73 device so as to be synchronized with each other, and the turning motor (forward / reverse motor) panel 66 The signal lamp 266c is installed so that the proximity limit striker 61a provided in the input pipe middle tube part 54 and the proximity limit 61b attached to the lower end of the storage hopper feeder box can be checked at the time of contact.

At this time, the input pipe 54 is preferably formed of a strong and heat-resistant steel pipe, the spring 52 is installed in the body portion 51b of the discharge pipe 51 is preferably formed of a spring steel rich in heat resistance and elasticity. In addition, it is preferable to use synthetic slag (LDS) or quicklime (CaO), which do not adversely affect the quality even if mixed into molten steel in the steel ladle, and the shape of the secondary raw material is an input pipe (54). In addition, it is preferable to use a spherical shaped product so as to slide well in the ejection pipe 51.

Reference numeral 63 is a belt, 70 is a sprocket.

Hereinafter, with reference to the drawings will be described in detail the operation according to the present invention.

When the filling of the scrap iron and the molten iron into the converter (1) is completed and oxygen is injected into the converter furnace through the oxygen lance (4), the worker is required to input the raw materials into the exit port (5) while the converter is established. As shown in FIG. 5, first, the power switch 266a is operated to the turning motor (orbital motor) 64b to turn the inlet pipe 54 in the off-line in the direction of the exit hole. .

Then, when the turning motor 64b rotates, the inlet pipe 54 in which the ejection pipe 51 received the power by the chain 68 is pivoted to be in line with the tap hole 5. At the same time, the solenoid 69 for operation of the purge line is operated so that nitrogen is blown into the nitrogen purge line.

When the striker 61a of the inlet port 55 provided in the middle pipe portion of the input pipe 54 contacts the proximity limit 61b of the lower end of the feeder box 60, the signal lamp 266c lights up in the turning motor panel 66. After checking this, turn on the power of the turning motor.

When the outlet 5 and the inlet pipe 54 are placed in a straight line, power is supplied to the feeder 62 and the drive motor 64a, thereby feeding the feeder from the storage hopper 71 of the hopper supply unit 70. The sub raw material 72 is dispensed from the storage hopper 71 by the vibration force supplied by the driving of the 62, and the sub raw material 72 is blown into the input pipe 54 through the inlet 55. , The injected sub-raw material 72 is pushed toward the ejection pipe 51 by the rotation of the screw screw shaft 57 subjected to the rotational force by the drive motor 64a.

In this way, before the subsidiary material is introduced into the tapping hole 5 through the extracting pipe 51 in the feeding pipe 54, the extracting pipe 51 is first rolled up by the subraw material and is drawn out to the front. At the same time as the insertion, the subsidiary material 72 is introduced into the tap hole 5 through the extraction section 51. As described above, when the subsidiary material 72 is introduced into the appropriate amount of tapping holes 5 (feeding time 5-10 seconds, feeding amount 20-50kg), the tapping holes 5 are closed, and the apparatus according to the present invention must be restored. At this time, the power supply of the Peter 62 and the drive motor 64a is turned off, and the power supply of the feeder 62 and the drive motor 64a is cut off when the sub raw material 72 is inserted into the input pipe 54. Since it is not supplied, the discharge pipe 51 causes the discharge pipe 51 to enter the input pipe 54 by the restoring force of the spring 52. After confirming this, the reverse power is turned on to the turning motor 64b to turn the input pipe 54 to the original position, and then the power of the turning motor 64b is turned off to complete a series of operations.

Therefore, according to the present invention, it is possible to prevent the outflow of the melt to the tap during the converter drilling, thereby improving the tapping error rate by suppressing the occurrence of steel current, thereby improving the productivity and extending the tap life of the tap, as well as the lower part of the converter or converter. It solves the problem of accumulating slag around and maintains a clean work site, prevents damage of surrounding equipment, prevents aging of equipment, improves worker's stability, dust and toxic gas. Is prevented from being released to the work site to prevent environmental pollution, and above all, the stability during the converter blow job is improved, it is possible to smooth the overall workability of the converter refining process.

Claims (1)

In the melt flow prevention device of the converter outlet, the hopper supply unit 70 for storing the secondary raw material 72 as a solid raw material; An input device unit 50 which receives the auxiliary material 72 from the hopper supply unit 70 and injects it into the tap hole 5; A turning device unit 60 which transmits power to the input device unit 50 and supports the weight and moves the input unit; A purge part 70 for preventing flame and dust discharge; in the melt flow prevention device of the tapping hole during the converter drilling, the raw material is discharged by the electric shaking force higher than the tapping hole (5) position The subsidiary material storage hopper 71 is equipped with a feeder 62, and the input device unit 50 has an input pipe 54 and a discharge pipe 51 on the tap hole 5 and the horizontal line. And an inlet 55, a spring 52, and a screw screw shaft 57, the inlet tube 54 of the inlet device 50 is flush with a motor 64a that provides rotational force. The input device unit 50 installed on the upper plate of the support base 65 and attached to the support base 65 is connected by a forward and reverse motor 64b and a chain 68 to provide rotational force in the forward direction or in the reverse direction. A purge line 59 is installed outside the pipe 54 to prevent the discharge of flame and dust from the outlet 5. Melt outflow prevention device in the tapping port of the converter blow to the gong.