JP2927686B2 - Heating device for refractory-lined container and heating control method thereof - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heating apparatus for a refractory-lined container and a heating control method therefor.

[0002]

2. Description of the Related Art A refractory-lined vessel (a ladle or the like) used for transporting molten steel from a converter to a casting facility has a refractory lined on the inner surface of a pot outer shell made of mild steel or the like. In this type of lined container, refractories are damaged or melted by thermal shock or continuous contact with molten steel at the time of unloading in the converter, so it is necessary to repair the refractories periodically. There are minor repairs, medium repairs, major repairs, and total repairs in which the refractory is completely replaced, depending on the degree of damage or erosion of the refractory.

[0003] In the repair work of refractories, it has been usual to use a fixed refractory formed in a predetermined shape such as a block shape from the beginning, and to stick the refractory on the inner surface of the outer shell of the container.
Since such work requires skill and is heavy labor, there has been a tendency in recent years to apply a clay-like or mud-like irregular refractory to the inside of the outer skin portion, thereby streamlining the repair work.

However, the above-mentioned irregular shaped refractory differs from a previously dried fixed refractory in that when it is not dried (during repair work), it contains about 6 to 7% of water. As in the case of, sudden heating may cause explosion. Therefore, conventionally, a burner (also used for heating when the container is used) is provided so that the crater is directed from the center of the upper opening of the container to the bottom of the container. While squeezing the combustion flame, secondary air (circulating air) whose flow rate is set higher than the primary air for stably burning the burner is ejected from the outer periphery of the crater along the combustion flame, and the combustion flame The length of the flame is increased, thereby causing a vertical circulating flow of the combustion gas so that the upper region and the lower region in the container are gradually heated at a uniform temperature (see FIG. 2). .

FIG. 5 shows a control circuit diagram of a conventional heating device for performing such heating control. This heating device causes a vertical circulating flow in a container 52 lined with an irregular refractory 51. Heating means (burner) 53 for heating while heating
And the amount of fuel supplied to the heating means 53
An air program setting unit 55 for storing a secondary air pattern 54 expressed as a secondary air amount in which the temperature of the refractory in the inside should be uniform in the vertical direction, and a control valve 56 for adjusting the secondary air amount to the heating means 53 And an air amount sensor 57 for measuring the secondary air amount, and an air amount indicating controller 58 for controlling a control valve 56 such that the measured value of the air amount sensor 57 matches the secondary air pattern 54. I have.

[0006]

In the above heating device, a secondary air pattern 54 is previously set in an air program setting unit 55 when performing combustion heating while causing a vertical circulating flow in the container 52. This secondary air pattern 5
The secondary air control valve 56 is controlled by the air amount indicating controller 58 on the basis of (4).

Therefore, in order to actually operate the refractory in the vertical direction with this heating device, the refractory 51 is required.
It is necessary to grasp an accurate secondary air pattern 54 according to not only the type of the container 52 but also the construction specification of the container 52. But,
In the conventional heating device, the secondary air control valve 56 is connected only to the air amount indicating controller 58, and the temperature indicating controller 59 for controlling the flow rate based on the inner surface temperature of the refractory 51 is provided with the secondary air control valve 56. , And there was no idea to control the control valve 56 directly or indirectly by the temperature indicating controller 59.

Accordingly, in order to obtain the secondary air pattern 54 in such a conventional heating device, both the fuel flow rate indicating controller 60 and the air amount indicating controller 58 are manually controlled and provided above and below the inner surface of the refractory. In order to minimize the temperature difference between the temperature sensors (thermocouples), the fuel flow rate is controlled manually by the flow rate control controller 60 and the secondary air flow rate is controlled manually by the air flow rate control controller 58. The only option is to determine the next air amount pattern 54.

As described above, in the prior art, the secondary air amount pattern 54 is determined by a manual operation such as trial and error. It took effort. In addition, even if the secondary air amount pattern obtained in this way is changed, such as when the type of burner or repair location is changed, the container is no longer optimal if the container's construction specifications change. We have to re-search for patterns with great effort.

The present invention has been made in view of the above circumstances, and aims to reduce the operating cost by easily obtaining an optimum secondary air (circulating air) pattern that changes for each construction specification. .

[0011]

Means for Solving the Problems In order to achieve the above object, the present invention has taken the following technical means. That is, in the method of the present invention, when performing combustion heating while causing a vertical circulating flow in a container lined with an amorphous refractory, the refractory temperature in the container in a vertical direction with respect to a certain fuel supply amount. In a heating control method for a refractory-lined container, a circulating air pattern expressed as a circulating air amount to be uniform is set, and a control valve for circulating air is controlled by an air amount indicating controller based on the circulating air pattern. Provided with a temperature indicating controller that controls the control valve so that the difference between the measurement values of the inner surface temperature sensors provided at the upper and lower portions of the inner surface of the refractory is minimized, for the container having a specific construction specification,
The circulating air pattern is set by heating the inside of the container while controlling the control valve by the temperature indicating controller, and then, for the container having the same construction specifications, the adjustment is performed based on the set circulating air pattern. A valve is controlled by the air amount indicating controller (claim 1).

[0012] The apparatus of the present invention further comprises a heating means for heating the inside of the vessel in which the irregular-shaped refractory is lined while causing a vertical circulating flow, and a fuel supply amount to the heating means. An air program setting device that stores a circulating air pattern expressed as an amount of circulating air in which the refractory temperature of the refractory should be uniform in the vertical direction, a control valve that adjusts the amount of circulating air to the heating means, A heating device for a refractory-lined container, comprising: an air amount sensor to be measured; and an air amount indicating controller that controls the adjustment valve so that a measurement value of the air amount sensor matches the circulating air pattern. A temperature indicating controller for controlling the control valve so as to minimize the difference between the measurement values of the inner surface temperature sensors provided at the upper and lower portions of the inner surface of the object is provided, and the temperature indicating controller and the air amount indicating controller are provided. But characterized in that it is connected via a switching means for inputting selectively to said control valve one of the control signals from the same control valve (claim 2).

[0013]

According to the present invention, the temperature indicating controllers 41 and 46 control the control valves (and) so that the difference between the measured values T _U and T _{L of} the inner surface temperature sensors 9U and 9L provided at the upper and lower portions of the inner surface of the refractory is minimized. Since the secondary air control valve 34 is controlled, the circulating air pattern 40 expressed as the amount of circulating air in which the temperature of the refractory in the container 1 should be uniform in the vertical direction for a certain fuel supply amount is automatically calculated. And accurately.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a heating device for a refractory-lined container 1 according to the present invention. In this figure, the heating device includes a flow control circuit 1B for controlling the fuel flow to the burner 5 based on a preset pattern, and the flow control circuit 1B is lined with an irregular-shaped refractory 1A. A temperature program setting unit 3 for storing a refractory temperature pattern 2 indicating the temperature progress of the inner surface of the refractory of the container 1 over time; A first temperature indicating controller 4 for setting the temperature according to the pattern 2.

The flow rate control circuit 1B comprises a flow rate program setting device 7 for storing a flow rate pattern 6 indicating the flow rate of fuel to a burner (heating means) 5 for heating the inside of the container 1 with time, And a flow rate controller 8 for controlling the burner 5 based on the flow rate pattern 6. The refractory temperature pattern 2 differs depending on the material and the moisture content of the irregular-shaped refractory 1A, and is determined by an experiment or the like performed in advance before the actual repair work. COG (coke oven gas) is employed as the fuel for the burner 5.

The container 1 has an inner surface temperature sensor 9 comprising a thermocouple or the like for measuring the upper and lower temperatures of the inner surface of the refractory 1A.
U, 9L, and an ambient temperature sensor 10 for measuring the ambient temperature in the container 1 are provided. Of these, the lower inner surface temperature sensor 9L and the ambient temperature sensor 10 are all replaced by a first switch (switching means) 11 Is connected to the first temperature indicating controller 4. The ambient temperature sensor 1
As 0, for example, an R thermocouple or a K thermocouple can be adopted.

The temperature sensors 9U, 9L, 10 are provided with recorders 9A, 9B, 10A for recording the measured values. The burner 5 is inserted through the center of the canopy 12 of the container 1 and has a fuel control valve 13 for controlling the fuel flow rate in the middle.
Are connected to a fuel supply means 15 by a pipe 14 provided with a fuel supply means. A flow sensor 16 for measuring the actual fuel flow rate in the pipe 14 is provided downstream of the fuel control valve 13. The flow sensor 16 and the control valve 13 are connected to the flow rate controller 8. The flow rate sensor 16 is provided with a recorder 16A for recording the actual fuel flow rate.

The first temperature indicating controller 4 is arranged such that, when the first switch 11 has selected the inner surface temperature sensor 9L,
The measured value _TL of the temperature sensor 9L is the refractory temperature pattern 2
A control signal 17 is issued to the flow rate indicating controller 8 so as to coincide with. However, when the first changeover switch 11 has selected the ambient temperature sensor 10, the second changeover switch 18 described later has selected the flow rate program setting device 7, and
Therefore, the control signal 17 does not reach the flow rate indicating controller 8.

The flow rate program setting device 7 and the first temperature indicating controller 4 are connected to the flow rate indicating controller 8 via a second changeover switch (switching means) 18. One of the control signal 19 of the setting device 7 and the control signal 17 of the temperature indicating controller 4 is selectively input to the flow indicating controller 8.

The flow rate program setting unit 7 has a learning function capable of storing a plurality of flow rate patterns 6, for example, a continuous learning function for continuously and automatically setting the flow rate pattern 6 with respect to elapsed time. Those with a semi-automatic learning function in which the operator performs input learning setting of the fuel flow rate by manual (button) operation at a changing point of the gradient of the flow rate pattern 6 with respect to the elapsed time or at regular intervals can be adopted.

In this case, an input means 20 for inputting the actual fuel flow rate of the burner 5 to the flow rate program setting device 7 is provided in the flow rate instruction controller 8. The input means 20 is connected to each of the flow program setting device 7 and the flow sensor 16. The input means 20 is operated when the second changeover switch 18 is on the first temperature indicating controller 4 side (A side in FIG. 1), and outputs measurement information 21 from the flow rate sensor 16 to an electric signal 22. The electric signal 22 is sequentially input to the flow rate program setting device 7.

Incidentally, in a low temperature region where the moisture of the undried refractory 1A cannot be completely removed, it is necessary to suppress the fuel supply to the burner 5 as much as possible and to slowly heat the refractory 1A in order to prevent explosion. There is. However, if the fuel supply amount is suppressed while only the primary air for the stable combustion of the burner 5 is jetted from the outer periphery, the combustion gas from the burner is mostly short-passed in the upper part of the vessel 1 and shorted in the lower part of the vessel 1. Is hardly heated, which causes a considerable temperature difference between the upper and lower portions of the container 1.

Therefore, the burner 5 of this embodiment is different from the burner 5 shown in FIG.
As shown in FIG. 1, a fuel injection cylinder 23 serving as a core having a crater with an open lower end, a first cylinder 24 for primary air injection fitted around the injection cylinder 23, and a first cylinder And a second cylindrical body 25 for secondary air injection which is fitted around the periphery of the second cylindrical body 24. The primary air 26 injected from the first cylinder 24 is
The secondary air 28 injected from the second cylinder 25 is used to stably burn the flame from the fuel injection cylinder 23, and the refractory 1A inside the container 1 is heated in the container 1 so that the temperature in the vertical direction is uniform. In the vertical direction.

That is, during the drying period of the refractory 1A, the burner 5 reduces the fuel flow rate to a low-load combustion state, and flows from the primary air 26 along the combustion flame from the outer periphery of the crater. The combustion flame is lengthened by ejecting secondary air (circulating air) 27 with a relatively high pressure, thereby causing the combustion gas to generate a vertical circulating flow 28 so that the upper region in the container 1 is increased. And the lower region is gradually heated so as to have a uniform temperature.

As shown in FIG. 2, the heating device according to the present embodiment includes an air amount control circuit 1C for supplying the primary air 26 and the secondary air 27 in an appropriate amount according to the fuel supply amount at that time. It has. The control circuit 1C includes a blower 29
A first pipe 30 connecting the first pipe 24 to the first pipe 24, and a second pipe 31 branching from the first pipe 30 and connecting the blower 29 to the second pipe 25. 30 has primary air 2
6 is provided with a primary air control valve 32 for adjusting the supply amount of primary air, a primary air amount sensor 33 for measuring the actual flow rate of the primary air 26, and a secondary conduit 31 for adjusting the supply amount of the secondary air 27. A secondary air control valve 34 and a secondary air amount sensor 35 for measuring the actual flow rate of the secondary air 27 are provided.

The primary air amount sensor 33 and the secondary air amount sensor 35 have a recorder 33 for recording these measured values.
A and 35A are connected respectively. The primary air control valve 32 and the primary air amount sensor 33 are connected to a primary air amount indicating controller 36, respectively.
It is connected to the flow sensor 16 of the flow control circuit 1B via an air ratio setting device 37 for proportionally setting the primary air amount according to the fuel supply amount.

On the other hand, the secondary air control valve 34 and the secondary air amount sensor 35 are connected to a secondary air amount indicating controller 38, respectively. Air program setting unit 3 for function control of the next air volume
9 is connected to the flow sensor 16 of the flow control circuit 1B. The air program setter 39 includes a secondary air pattern 40 expressed as a secondary air amount that is required to make the refractory temperature in the container 1 vertically uniform with respect to the fuel supply amount.
Is stored, and the secondary air amount indicating controller 38 controls the secondary air adjustment valve 34 so that the measured value of the secondary air amount sensor 35 matches the secondary air pattern 40.

Further, the air amount control circuit 1C of the present embodiment
In addition to the first temperature indicating controller 4 of the flow control circuit 1B, a second temperature indicating controller 41 for controlling the secondary air adjusting valve 34 in accordance with the vertical temperature condition in the container 1 is provided.
The second temperature indicating controller 41 controls the secondary air control valve 34 so that the difference between the measured values of the inner surface temperature sensors 9U and 9L provided at the upper and lower portions of the inner surface of the refractory is minimized. Therefore, both inner surface temperature sensors 9U and 9L are connected to the second temperature indicating controller 41, respectively.

The second temperature indicating controller 41 and the air program setting unit 39 are provided with a third switch (switching means).
The second changeover switch 42 is connected to the secondary air amount indicating controller 38 via the second air amount indicating controller 42 if the secondary air pattern 40 has not been set in the air program setting unit 39 yet. It is inserted in the controller 41 side (A side in FIG. 1), and when the same pattern 40 is set, it is switched to the setter 39 side (B side in FIG. 1).

When the secondary air pattern 40 is set by the heating device, the lower inner surface temperature sensor 9
When L measurements T _L is lower than the measured value T _U of the upper of the sensor 9U, the secondary for stirring force the air amount is small in the container 1 by the circulating flow 28 is weak, the high-temperature combustion gas is short It is considered to have passed. Therefore, the second temperature indicating controller 41 controls the control signal 43 so as to increase the secondary air 27.
And the secondary air amount indicating controller 38 controls the secondary air control valve 34 to increase its opening based on the control signal 43.

On the other hand, when the measured value T _L of the lower inner surface temperature sensor 9L is higher than the measured value T _U of the upper of the sensor 9U is stirred in the container 1 by the circulating flow 28 is much quantity of secondary air The power is too strong and the lower part of the container 1 is heated too much. Therefore, the second temperature indicating controller 41 issues a control signal 43 so as to decrease the secondary air 27, and based on the control signal 43, the secondary air amount indicating controller 38 adjusts the opening degree of the secondary air adjusting valve 34. Lower.

On the other hand, if the optimum secondary air pattern 40 has already been set in the setting device 39, the setting device 39 calculates the optimum secondary air amount according to the fuel flow rate based on the pattern 40. Then, this value is transmitted as a control signal 44 to the secondary air amount indicating controller 38 via the third changeover switch 42, and the controller 38 adjusts the opening degree of the secondary air control valve 34 to that value.

Next, a method of controlling the heating of the container 1 by the above-described heating device will be described. Here, in the present embodiment, for the container 1 of a specific construction specification having a different container size, a repaired portion of the refractory 1A, and the like, first, in the first heating control, the secondary temperature pattern controller 41 is used by using the second temperature indicating controller 41. Then, in the second heating control, the temperature pattern control is performed using the first temperature indicating controller 4, and the optimum refractory temperature pattern 2 specified in advance for each type of refractory 1A is optimized. A suitable flow pattern 6 is obtained.

That is, in the first heating process for the container 1 of the construction specification, the first and third changeover switches 1
1 and 42 are set on the side A in FIG. 1, and in this state, for example, the fuel flow rate is 50, 80, 100 (Nm ³ /
The flow rate controller 8 is controlled so as to change stepwise as shown in h), and fuel is supplied from the fuel supply means 15 to the burner 5. Note that this fuel step control can be performed, for example, by inputting a flow rate pattern 45 in which the fuel flow rate changes stepwise after a certain period of time has passed to the flow rate program setting device 7.

At this time, the primary air amount indicating controller 36
At the same time as controlling the primary air regulating valve 32 so that the measured value of the flow rate sensor 16 becomes the primary air amount for stable combustion obtained through the air ratio setting device 37, the second temperature indicating controller 41 is connected to the upper and lower inner surface temperature sensors. The secondary air control valve 34 is controlled via the third changeover switch 42 and the secondary air amount indicating controller 38 so that the difference between the measured values T _U and T _L of 9U and 9L is minimized.

Accordingly, the flow rate sensor 1 in the case where the values of the recorders 9A and 9B in each of the temperature sensors 9U and 9L are the same.
6 and the recorder 35 of the secondary air amount sensor 35
By plotting the value of A and connecting these points with a curve, the optimum secondary air that is the amount of secondary air in which the refractory temperature in the container 1 should be uniform in the vertical direction for a certain fuel supply amount A pattern 40 is obtained, and the pattern 40 is
9 is stored.

Thus, the optimum secondary air pattern 4
When 0 is obtained, the optimum flow rate pattern 6 conforming to the refractory temperature pattern 2 is obtained for another container 1 having the same construction specifications. That is, the first and second changeover switches 11,
1 are placed on the A side in FIG. 1 and the third changeover switch 42 is switched to the B side in FIG. 1, and in this state, fuel is supplied from the fuel supply means 15 to the burner 5 according to the refractory temperature pattern 2.

At this time, the first temperature indicating controller 4 uses the temperature program setting device 3 to measure the measured value _TL of the inner surface temperature sensor 9L.
Sends a control signal 17 to the flow rate indicating controller 8 via the second changeover switch 18 so as to follow the optimum refractory temperature pattern 2 stored in the burner 5 based on the control signal 17. The temperature pattern control for controlling the flow rate adjustment valve 13 is performed.

While such temperature control is being performed, the input means 20 in the flow rate indicating controller 8 converts the measurement information 21 of the flow rate sensor 16 into an electric signal 22 and inputs the same to the flow rate program setting device 7. The unit 7 sequentially stores the flow rate information and learns and sets the optimum flow rate pattern 6 corresponding to the refractory temperature pattern 2. When another container 1 having the same construction specifications is heated by the heating device in actual operation, the first, second, and third changeover switches 11 are all switched to the B side in FIG. Is performed based on the flow rate.

Then, based on the control signal 19 from the setting device 7, the flow rate indicating controller 8 controls the burner so that the measured value of the flow sensor 9 follows the optimal flow pattern 6 learned and set at the time of the second temperature pattern control. 5 is operated to control the flow rate. In this way, from the third time on, several containers 1 having the same construction specifications
Optimum secondary air pattern 4 with no temperature difference above and below inside
The above flow rate control can be performed under 0 and based on the optimum flow rate pattern 2 uniquely corresponding to the optimum refractory temperature pattern 2.

Since the third switch 11 is switched to the ambient temperature sensor 10 side (B side in FIG. 1) after the third time, the ambient temperature in the container 1 is measured by the sensor 10. At this time, since the second changeover switch 18 is switched to the flow rate program setting device 7 side, the control signal 17 from the temperature indicating controller 4 is not transmitted to the flow indicating controller 8 and does not affect the flow rate control. Absent.

By measuring the ambient temperature from the second time onward, an accident such as abnormal combustion of the burner 5 which cannot be detected only by the flow rate control can be detected by detecting an abnormality in the ambient temperature. become. (Experimental Example) The above-described heating control method of the present invention was actually performed on a container (a molten steel ladle) 1 for transporting about 250 tons of molten steel, and its effectiveness was verified.

Here, the upper inner surface temperature sensor (thermocouple)
9U was provided at a height of about 2610 mm from the bottom of the container 1 and the lower inner surface temperature sensor 9L was provided at a height of about 300 mm from the bottom of the container 1, and the secondary air pattern 40 was obtained by the above-described method. FIG. 3A is a graph showing a temporal change of the secondary air when the amount of the secondary air is controlled based on the secondary air pattern 40 obtained by the first heating control,
FIG. 3B shows a temporal change of the refractory temperature at that time. No. 1 is the upper part of the inner surface of the refractory 1A.
No. 2 is an intermediate part, No. Reference numeral 3 denotes a lower temperature change.

As is clear from FIG. 3 (b), by following the secondary air pattern 40 obtained by the above-described method, the inside of the container 1 is kept in a state where there is almost no temperature difference between the upper, middle and lower portions of the inner surface of the refractory 1A. Could be heated. FIG.
FIG. 3 shows another embodiment of the present invention.
The difference from the above circuit is that the temperature indicating controller 46 controls both the fuel control valve 13 and the secondary air control valve 34.

That is, the temperature indicating controller 46 in this case
Are the fourth changeover switch 47 and the fifth changeover switch 48
, And connected to the secondary air control valve 34 via a fourth changeover switch 47 and a sixth changeover switch 49, and the fifth changeover switch 4.
A flow rate indicating controller 8 is connected to 8, and a secondary air amount indicating controller 38 is connected to a sixth switch 49.

Therefore, according to this embodiment, only one temperature indicating controller 46 is required, and there is an advantage that the equipment cost of the apparatus can be reduced.
4 is directly controlled, hunting is more likely to occur than in the case of FIG. 1 in which the second temperature indicating controller 41 indirectly controls the secondary air adjusting valve 34 via the secondary air amount indicating controller 38. There is a disadvantage that accuracy is poor.

The flow program setting device 7 of this embodiment does not have a learning function, and the flow instruction controller 8 is not provided with the input means 20. Therefore, the optimum flow rate pattern 6 is artificially calculated by comparing the record of the recorder 9B of the inner surface temperature sensor 9L with the record of the recorder 16A of the flow rate sensor 16, and thereafter, is input to the flow rate program setting device 7.

The present invention is not limited to the above embodiment.

[0049]

As described above, according to the present invention,
Since the circulating air (secondary air) pattern 40 required for heating the container 1 in a state where the upper and lower temperatures are uniform can be automatically and accurately obtained, the optimum circulating air that changes for each construction specification can be obtained. The pattern 40 is required very simply, and the working cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a control circuit diagram of a heating device for a refractory-lined container according to the present invention.

FIG. 2 is a sectional view of a container and a burner.

FIG. 3A is a graph showing a temporal change of the secondary air when the amount of the secondary air is controlled based on an optimum secondary air pattern, and FIG. It is a graph which shows the temperature change of the inner surface of a thing.

FIG. 4 is a control circuit diagram of a heating device for a refractory-lined container according to another embodiment.

FIG. 5 is a control circuit diagram of a conventional heating device for a refractory-lined container.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Container 1A Irregular refractory 5 Heating means (burner) 6 Flow rate pattern 9U Inner surface temperature sensor (upper side) 9L Inner surface temperature sensor (lower side) 34 (secondary air) control valve 35 (secondary) air amount sensor 38 (two next) air amount instruction adjusting meter 39 air program setter 40 secondary air pattern 41 (second) temperature indicating controller meter 42 third changeover switch (switching means) 43 control signals 44 control signals 46 temperature Indicating controller T _U upper Measured value Measured value below _TL

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) F27D 1/16 B22D 41/02

Claims (2)

(57) [Claims] When a combustion is performed in a vessel (1) lined with an amorphous refractory (1A) while generating a vertical circulating flow (28), the vessel (1) is supplied with respect to a certain fuel supply amount. A circulating air pattern (40) expressed as an amount of circulating air in which the temperature of the refractory in the parentheses) should be uniform in the vertical direction, is set based on the circulating air pattern (40). In a heating control method for a refractory-lined container controlled by a quantity indicating controller (38), an inner surface temperature sensor (9)
U) The temperature indicating controllers (41) and (46) for controlling the control valve (34) so as to minimize the difference between the measured values (T _U ) and (T _L ) of (9L) are provided. The temperature indicating controller (41) for the container (1) of the construction specification
The circulating air pattern (40) is set by heating the inside of the container (1) while controlling the control valve (34) according to (46), and then this setting is performed for the container (1) having the same construction specifications. Circulating air pattern (4
0) The heating control method for a refractory-lined container, wherein the control valve (34) is controlled by the air amount indicating controller (38) based on 0). 2. A heating means (5) for heating the inside of the container (1) lined with the amorphous refractory (1A) while generating a vertical circulating flow (28), and to the heating means (5). An air program setting device (39) for storing a circulating air pattern (40) expressed as an amount of circulating air in which the refractory temperature in the container (1) is to be uniform in the vertical direction with respect to the fuel supply amount; A control valve (34) for adjusting the amount of circulating air to the heating means (5); an air amount sensor (35) for measuring the amount of circulating air; An air amount indicating controller (38) for controlling the adjusting valve (34) so as to coincide with (40).
And a heating device for a refractory-lined container, comprising: an inner surface temperature sensor (9) provided above and below the inner surface of the refractory.
U) and temperature indicating controllers (41) and (46) for controlling the control valve (34) so that the difference between the measured values (T _U ) and (T _L ) of (9L) is minimized. Indicating controller (41) (46) and air program setting device (3)
9) is connected to the control valve (34) via a switching means (42) for selectively inputting one of the control signals (43) and (44) from the control valve to the control valve (34). A heating device for a refractory-lined container.