KR20020018503A - Tapping bar for tap hole opener of blast furnace - Google Patents

Abstract

PURPOSE: A tapping bar for opening a tap hole of a blast furnace is provided to which a device for sensing and intercepting counter current of molten material is attached so as to prevent damage of a driving part of a hole opener caused by counter current of the molten material when penetrating the tap hole. CONSTITUTION: In a tapping bar which is mounted on a tapping socket of a hole opener penetrating a tap hole into a blast furnace, at one side end of which a bit is equipped, and in which a channel(17) is formed, the tapping bar for opening the tap hole of the blast furnace comprises a temperature detector(20) which is installed at the channel(17) so as to sense a temperature of a molten material that is counter flown by being spouted from the tap hole; a solenoid valve(30) which is installed at the back part of the temperature detector(20) so as to open or close the channel(17) by receiving electrical signals from the temperature detector(20); a first signal transmitter(40) transmitting signals detected from the temperature detector(20) to a control part; and a second signal transmitter(50) transmitting output signals of the control part to the solenoid valve(30).

Description

Tapping bar for tap hole opener of blast furnace}

The present invention provides a blast furnace equipped with a melt backflow detection and blocking device for preventing breakage of the opening unit driven by the reverse flow of the melt when passing through the outlet for discharging the melt including slag and slag inside the blast furnace. A tapping bar for pioneering opening.

In general, the blast furnace industry inputs iron ore as raw material and coke as fuel at an appropriate ratio, and then supplies high temperature hot air from the hot blast furnace and undergoes a melting process through a reduction reaction in the blast furnace for a certain time, and includes water and slag. The operation of discharging the melt to the outside of the blast furnace is repeated at regular intervals.

As a device used for discharging the melt, the tap hole is a passageway for discharging the melt inside the blast furnace to the outside of the blast furnace, and after the discharge of the melt is completed through the tap hole, the mud material is an irregular refractory material. The mud material is excavated to fill the outlet and the apparatus for discharging the melt inside the blast furnace to the outside of the blast furnace is called a tap hole opener and the excavation part of the hole is called a tapping bar.

1 is a side cross-sectional view of a conventional opening of the opening of the blast furnace. In the related art, a tapping bar 11 for discharging the melt 2 of the inside of the blast furnace 1 to the outside is provided with a tapping socket 19a of the opening 10. It is mounted on.

And the guide cell 13 in the longitudinal direction of the tapping bar 11 is installed on both sides of the opening machine 10, the mounting bed 12 is installed in the lower portion of the guide cell 13 and the tapping bar therein A drive motor 12a for driving 11 is provided, and the tapping bar 11 performs forward and backward movements and rotational movements simultaneously by the power of the drive motor 12a to perform opening work of the exit port. do.

2 is a side cross-sectional view of a conventional tapping bar. Looking at the tapping bar 11 in more detail, a tip 18 is formed at an end thereof for drilling, and an inside of the tapping bar 11 is introduced from a high-pressure nitrogen inlet 14. A flow path 17 through which the coolant flowing from nitrogen and the coolant inlet 15 flows is formed, and a tapping bar mounting groove 19b fastened to the tapping socket 19a of the open air is formed to be mounted in the open air. .

3A and 3B are side cross-sectional views showing the opening of the exit of the conventional blast furnace. As shown in FIG. 3A, the opening machine 10 is positioned in front of the exit port 3, and the tapping bar 11 is located in the exit port. When the driving motor 12a is driven in close contact with (3), the mud material 4 filling the exit port 3 is excavated by repetitive operations such as feed and air blowing, forward drill, and hit hammering. .

At this time, the mud material 4 is smoothly discharged and at the same time nitrogen through the flow path 17 formed inside the tapping bar to prevent thermal deformation and burnout of the bit 18 attached to the tip of the tapping bar 11. The high pressure nitrogen introduced from the inlet 14 and the cooling water introduced from the cooling water inlet 15 are ejected at the tip of the bit 18.

However, as shown in FIG. 3B, at the moment when the mud material 4 filled in the tap hole 3 is penetrated by the tapping bar 11, the melt 2 in the blast furnace 1 is instantaneously tapped. The melt 2 flows back to 17 and flows into the driving motor 12a of the mounting bed 12, which is the driving unit of the opening machine 10, and solidifies.

Therefore, according to the tapping bar for opening the opening of the blast furnace as described above, the driving of the tapping bar flow path 17 due to the reverse flow of the instantaneous high temperature and high pressure melt 2 at the time of penetration through the tap opening 3 and the solidification of the melt There is a problem that productivity is reduced due to the delay of the next elected operation due to the stop of the operation of the facility according to the inoperability of the motor 12a.

The present invention has been invented to solve the problems in the prior art as described above, and detects the reverse flow into the flow path of the tapping bar of the melt generated at the moment of penetration of the mud material filled in the exit port, the inflow of the melt flow back The purpose of the present invention is to provide a tapping bar for opening the blast furnace of the blast furnace, which is equipped with a melt backflow detection and blocking device for preventing the breakage of the exit opening machine and blocking the operation of the installation.

Figure 1 is a side cross-sectional view of the exit opening of the conventional blast furnace.

Figure 2 is a side cross-sectional view of a conventional tapping bar.

Figure 3a and Figure 3b is a side cross-sectional view showing a port opening operation of the conventional blast furnace.

Figure 4 is a side cross-sectional view of the opening machine equipped with the present inventors tapping bar.

Figure 5 is a side cross-sectional view of the present inventors tapping bar.

Figure 6 is a flow chart showing the opening of the tapping opening of the blast furnace using the present invention.

<Description of Symbols for Major Parts of Drawings>

1: inside blast furnace 2: melt

3: starting point 4: mud material

10: opening machine 11: conventional tapping bar

17: Euro 18: the beat

20: temperature detector 30: solenoid valve

40: primary signal transmitter 50: secondary signal transmitter

70: tapping bar

The tapping bar for opening the tap opening of the blast furnace of the present invention for achieving the above object is mounted on the tapping socket of the opening machine which is a device for penetrating the tap opening of the blast furnace, and has a bit at one end and a flow path is formed therein. In the tapping bar, The flow path is provided with a temperature detector for sensing the temperature of the melt flows back from the outlet, the solenoid valve is installed at the rear end of the temperature detector to open and close the flow path receiving the electrical signal from the temperature detector, and And a second signal transmitter for transmitting the signal detected by the temperature detector to the controller, and a second signal transmitter for transmitting the output signal of the controller to the solenoid valve.

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

As shown in the cross-sectional view of the opening machine equipped with the tapping bar of the present invention of FIG. 4, and the side cross-sectional view of the tapping bar of the present invention of FIG. The flow path 17 is formed in the inside thereof, and the method of attaching to the air hole is the same as the conventional tapping bar 11.

However, the tapping bar 70 of the present invention, unlike the conventional tapping bar 11, the moment of passing through the mud material filled in the exit port of the flow path 17 so as to initially detect the temperature of the melt ejected from the exit port The temperature detector 20 is attached inside.

According to an embodiment of the present invention, it is preferable that the temperature detector 20 uses a sheath type thermocouple.

In addition, although the flow path 17 is opened at the rear end of the temperature detector 20 when the mud material is penetrated, when the melt flows back into the flow path 17, the flow path 17 receives an electrical signal from the temperature detector 20. ) Is temporarily installed a solenoid valve (30).

Meanwhile, a groove having a predetermined depth is formed on the surface of the tapping bar 70 between the solenoid valve 30 mounted on the tapping bar 70 and the tapping bar mounting groove 19b, and the temperature detector 20 is formed in the groove. The primary signal transmitter 40 for transmitting the electrical signal detected by the control unit and the secondary signal transmitter 50 for transmitting the output signal of the control unit to the solenoid valve 30 is installed.

At this time, the primary signal transmitter 40 and the secondary signal transmitter 50 are slide-type to facilitate mounting on the tapping bar 11.

Hereinafter will be described in detail the operation of the present invention configured as described above.

6 is a flow chart showing the opening of the tap opening of the blast furnace using the present invention, first, by excavating the mud material 4 of the tap opening 3 in order to discharge the melt 2 of the inside of the blast furnace 1 At the opening of (3), the melt 2 of high temperature and high pressure is discharged to the outside of the blast furnace through the penetration part of the tap opening 3, and a part of it flows back to the flow path 17. As shown in FIG.

The temperature of the melt flowing back to the flow path 17 of the tapping bar 70 is detected by the temperature detector 20 attached to the tip of the tapping bar 70, the change in the sensed temperature is a voltage signal of mV unit The output is input to the converter via the primary signal transmitter.

The mV unit voltage signal input to the converter is converted into a signal of 1 ~ 5V and input to the controller.

The controller compares the detected temperature of 0 to 1200 ° C. corresponding to the voltage of 1 to 5 V with the temperature set by the driver, and outputs the detected temperature as a digital signal when the detected temperature is higher than the set temperature.

The output digital signal is input to a converter and converts a voltage signal of 0 to 15 V, which is an operating voltage of the solenoid valve 30, into a 110 to 220 V, which is an operating voltage signal of the solenoid valve 30.

Finally, the signal converted by the transducer is transmitted to the solenoid valve 30 by the secondary signal transmitter 50 to seal the flow path 17 to the melt 2 in the blast furnace 1 It is possible to prevent backflow along the flow path 17 of the tapping bar at an instant.

As described in detail above, when the tapping bar for opening the opening of the blast furnace with the melt backflow detection and blocking device of the present invention is used, the reverse flow of the melt in the opening opening of the blast furnace is blocked early, As the melt flows backward during opening, it prevents the tapping bar flow path and prevents the operation of the drive motor. It prevents damage to the opening and exit opening equipment, and prevents equipment accidents and improves productivity by stable operation of the equipment. It can work.

Claims (1)

In the tapping bar mounted to the tapping socket of the opening machine, which is a device for penetrating the outlet of the blast furnace, having a bit at one end and a flow path formed therein, the flow path 17 is ejected from the outlet 3 to flow back A temperature detector 20 for sensing the temperature of the melt 2 to be formed, and a solenoid valve 30 installed at a rear end of the temperature detector 20 to open and close the flow path 17 by receiving an electrical signal from the temperature detector 20. ), A first signal transmitter 40 for transmitting the signal detected by the temperature detector 20 to the controller, and a second signal transmitter 50 for transmitting the output signal of the controller to the solenoid valve 30. Tapping bar for opening the exit of the blast furnace, characterized in that configured to include.