KR20020000338A - An apparatus for heating inner part of a converter - Google Patents

Abstract

PURPOSE: A refractory heat protection apparatus of a converter is provided which stands by after being ascended to a non-interference position that is not interfered with the converter facility during smelting operation, and descends to a heat protection position during heat protection operation so that heat protection is automatically done. CONSTITUTION: The refractory heat protection apparatus of a converter comprises guide rolls(18) which are mounted on both side surfaces of a heat radiation cover part(1) so that the guide rolls(18) are moved along vertical guide rails(2A,2B) fixed to a facility frame; ropes(58) which are coiled on wire drums(54) and connected to the upper part of the heat radiation cover part(1), wherein the amount of rotation is sensed by a sensor(56) in the wire drums(54); a driving motor(52) which is mounted on the facility frame, and by which the wire drums(54) is rotationally driven; and a facility control computer(6) which controls tilting of the converter and is connected to the sensor(56), a valve(44), an ignition plug and the driving motor(52).

Description

An apparatus for heating inner part of a converter}

The present invention relates to a device for heating the converter, which is a molten steel refining facility of a steel mill, through a furnace in a tilting state, during the refining operation, ascends to a non-interfering position that does not interfere with the converter facility, and descends to a holding position during the thermal work. It relates to a refractory heat retention device of the converter so that the heat retention work can be done automatically.

In general, the heat retention of the converter consisting of the outer iron skin and the internal refractory brick portion is a major factor for determining the temperature of the furnace melt, and it is desirable to maintain the optimum state in order to produce high quality molten steel. Therefore, when the converter is not operated for a predetermined time, the thermal insulation work is performed by various methods.

In the conventional heat retaining method, as shown in FIG. 1, the converter 110 is kept upright, and the oxygen lance 120 is inserted into the furnace port 112 to blow oxygen into the heat outlet 113. 130) and inserting the thermal gas by blowing the thermal gas (see FIG. 1A) and rotating the converter 110 in a tilted state to keep it horizontal and inserting the thermal burner 130 into the furnace port 112. The thermal burner 130 is roughly classified into a method of performing the thermal work by blowing the thermal gas (see FIG. 1B), and particularly the thermal burner 130 used in the latter method, as shown in FIGS. 1B and 2. It is mounted on the trolley-shaped steel frame body 140 that is movable along, and has a heat dissipation cover 142 to block the heat generated during the heat retention operation to the steel frame body 140 side. Of these, the heat retaining structure according to the latter method is related to the present invention, and therefore only the following description will be given.

Reference numeral 114 is connected to the tilting motor (not shown) is a tilting shaft to rotate the converter 110, 132 is to the main supply pipe 136 for supplying the thermal gas to the thermal burner (130) The flexible pipe connected through the valve 134, 134 represents a valve for opening and closing the supply of the heat retaining gas.

However, the conventional converter heating method requires a large number of people and a considerable time for transporting, installing and removing a relatively heavy heating device, and such manual work is not only inefficient but also risks of safety accidents. It was inherent.

The present invention has been made in order to solve such a conventional problem, the components for the converter thermal insulation to rise to a non-interfering position that does not interfere with the converter equipment during refining operation, and to descend to the thermal position during the thermal insulation work It is an object of the present invention to provide a refractory thermal insulation device of a converter that can automatically perform a series of operations to improve the efficiency of thermal work.

1A and 1B are working state diagrams schematically showing a state of keeping refractory of a converter according to a conventional method;

FIG. 2 is a partial cutaway perspective view showing the heat retaining state by the heat retaining device shown in FIG. 1B in more detail; FIG.

Figure 3 is a schematic view showing a converter facility equipped with a refractory heat insulating apparatus according to the present invention as a whole.

4 is an exploded perspective view showing a refractory heat insulating apparatus of a converter according to the present invention;

5A and 5B are schematic explanatory views showing when the refractory heat retention apparatus according to the present invention is in the heat retention position and the standby position, respectively;

Explanation of symbols on the main parts of the drawings

1 ... heat dissipation cover 2A, 2B ... guide rail

3 ... thermal burner section 4 ... flexible piping section

44 ... automatic valve 5 ... driven

52 ... drive motor 54 ... wire drum

56 ... sensor 58 ... rope

6 ... Equipment control computer

As a technical configuration for achieving the above object, the present invention, the heat radiation cover portion having a size covering the converter furnace, a heat-burning burner portion built in the spark plug and mounted on the heat-dissipating cover portion, and the heat-burning burner portion In the apparatus for insulating the converter in the tilted state consisting of a flexible pipe for supplying the combustion gas to the furnace port side, with a guide roll on both side surfaces of the heat dissipation cover to move along the vertical guide rail fixed to the equipment frame The upper end of the heat dissipation cover part is connected to a rope wound around a wire drum in which a rotation amount is sensed by a sensor, and the wire drum is rotationally driven by a drive motor mounted on a facility frame, and the sensor, valve, and spark plug And the drive motor is connected to the facility control computer for controlling the converter slope, the refractory insulation of the converter characterized in that the control The value of the maryeonham.

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

Figure 3 is a schematic view showing a converter facility equipped with a refractory heat retaining device according to the present invention, Figure 4 is an exploded perspective view showing a refractory heat retaining device of the converter according to the present invention.

The heat dissipation cover unit 1 is a refractory hot material cover 12 having a size capable of covering the furnace port 112 of the converter 110 and a heat dissipation cover 14 having substantially the same size as the hot material cover 12. ), And the hot material cover 12 and the heat dissipation cover 14 are fixed to each other in a stacked form. In addition, an inspection opening 16 may be formed to penetrate the hot material cover 12 and the heat dissipation cover 14 to inspect the inside of the converter during the heat retaining operation. In addition, the upper and lower guide rolls 18 are rotatably mounted on both side portions of the heat dissipation cover 14, and the guide rolls 18 are vertically along the guide rails to which the heat dissipation cover 1 is described later. Make the move smoothly.

The heat dissipation cover 1 is guided up and down by a pair of guide rails 2A and 2B that are fixed to the facility frame and maintained in an upright state, wherein the guide rails 2A and 2B are each 'c'. The concave bent portions are bent in a shape so as to face each other to prevent the guide roll 18 of the heat dissipation cover portion 1 from being derailed.

The thermal burner part 3 inserted and fixed to penetrate the hot material cover 12 and the heat dissipation cover 14 of the heat dissipation cover part 1 includes a burner (not shown) and a spark plug (not shown). The heat retaining gas consisting of combustion gas and air is supplied through the pipe part 4. And, the spark plug is connected to the facility control computer 6 to be described later and automatically controlled.

The pipe part 4 has a flexible pipe 42 having one end connected to the thermal burner part 3 and the other end having an automatic valve 44 connected to the main supply pipe 136. Of course, the automatic valve 44 functions to open and close the supply of the holding gas. In addition, the automatic valve 44 is connected to the facility control computer 6 to be described later is automatically controlled.

In addition, the up and down of the heat dissipation cover unit 1 is made through a driving unit 5 mounted on the equipment frame, and the driving unit 5 is a driving motor 52 and a rotation shaft 53 of the driving motor 52. And a plurality of wire drums 54 mounted on the wire. The drive motor 52 is connected to and controlled by the facility control computer 6 for controlling the converter tilt, and the rope 58 wound around the wire drum 54 includes a heat dissipation cover of the heat dissipation cover unit 1. 14) As the driving motor 52 rotates forward and backward by being connected to the upper surface, the heat radiation cover part 1 is raised or lowered while the rope 58 is wound or unwound on the wire drum 54. In addition, the drive unit 5 has a sensor 56 made of a cam limit switch or the like, and such a sensor 56 usually detects the rotational speed of the wire drum 54 or the rotating shaft 53 and transmits the information to the facility control computer. By transmitting to (6), the position of the heat dissipation cover part 1 can be grasped. Reference numeral 53a denotes a bearing for supporting the rotation shaft 53.

Of course, the installation position of the guide rails (2A) (2B) should be set so that the heat retaining operation is appropriately performed when the converter 10 is tilted for heat retaining and the heat dissipation cover part 1 is lowered to the heat retaining state.

By using the apparatus of the present invention having such a configuration can be carried out the refractory thermal insulation work of the converter automatically, as described above.

The heat dissipation cover part 1 of the present invention automatically raises and lowers the heat retaining position (see FIG. 5A) and the standby position (see FIG. 5B), and this operation is performed by the facility control computer 6.

That is, the facility control computer 6 generates a signal for the operator to automatically place the heat dissipation cover part 1 in the standby position during the molten steel refining operation or by the operator's input during the heat retaining operation. Or to automatically generate a signal such that the heat dissipation cover 1 is in the heat retaining position.

First, in the heat retaining position shown in Fig. 5A, the converter 110 rotates in a tilted state, and after completion of the state, the drive motor 52 operates to rotate the wire drum 54, whereby the wire As the rope 58 wound around the drum 54 is released, the heat dissipation cover 1 is lowered to the heat retaining position. At this time, the rotational speed of the wire drum 54, that is, the amount of rotation is sensed by the sensor 56, and thus the facility control computer 60 can grasp the falling state of the heat dissipation cover unit 1 by the rotational speed, When it is determined that the heat dissipation cover 1 has reached the heat retaining position, the drive motor 52 is stopped. Then, the automatic valve 44 is opened to supply the heat retaining gas into the converter 110, and at the same time or The burner of the heat keeping burner part 3 is sequentially burned to perform the heat retaining action.

Next, the heat retaining state is terminated by the molten steel refining operation signal, and the heat dissipation cover part 1 rises to the standby position. As a result, the open automatic valve 44 is closed, and the driving motor 52 is reversed in the opposite direction. The heat dissipation cover unit 1 is driven to raise the heat dissipation cover unit 1, and the heat dissipation cover unit 1 can be positioned at an appropriate standby position by detecting the rising state of the heat dissipation cover unit 1 at this time. Then, when it is determined that the heat dissipation cover part 1 has risen to the standby position, the molten steel refining operation using the converter 110 is started.

Of course, the order of operation of the apparatus described herein is only one embodiment, and may be implemented in other aspects.

As described above, according to the refractory heat insulating device of the converter according to the present invention, during the molten steel refining, the heat dissipation cover portion and the heat burner portion is raised to the standby position not to interfere with the refining equipment, and during the heat insulation work, the heat dissipation cover portion and heat insulation By the automatic operation of the burner to lower the heat, it is possible to save a large number of people and time for transporting, installing and removing a relatively heavy heating device, and there is a risk of safety accidents associated with such work. Has a reduced effect.

Claims (1)

It consists of a heat dissipation cover part having a size covering the converter furnace port 112, a heat burner part mounted to the heat dissipation cover part with a built-in spark plug, and a flexible pipe part having a valve to supply combustion gas to the heat burner part. In the device which heats the converter in the closed state on the furnace side, The guide rolls 18 are provided at both side surfaces of the heat dissipation cover part 1 so as to move along the vertical guide rails 2A and 2B fixed to the equipment frame, and the upper end of the heat dissipation cover part 1 is a sensor. And a wire 58 wound around the wire drum 54 where the amount of rotation is sensed by 56, and the wire drum 54 is rotationally driven by a drive motor 52 mounted to the equipment frame. 56, the valve 44, the spark plug and the drive motor 52 is connected to the facility control computer (6) for controlling the converter tilt is controlled refractory heat insulating apparatus.