JPH0555796B2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a method of dividing the surface of refractories in various furnaces such as pig iron mixer cars, converter DH furnaces, PH furnaces, etc. into a plurality of parts, determining addresses, and lining each address. .

Conventionally, when repairing damaged parts of the refractories in the furnace of various large furnaces such as pig iron mixers and converters, the extent of damage to the refractories in the furnace was inspected with the naked eye after the refractories had cooled to room temperature. If there are areas that require repair, the spray nozzle of the spray repair machine is put into the furnace, and the worker also enters the furnace and manually operates the spray repair machine to repair the damaged parts. They were repairing it by spraying it with material.

However, this type of repair method requires humans to go directly into the furnace to inspect and repair damaged parts, so the furnace must be cooled down to near outside temperature before the inspection and repairs are completed. There was a problem in that it took a long time to complete the process, leading to a decrease in the operating rate of the furnace. Furthermore, since the monolithic refractory is injected from the nozzle within an enclosed area, there is also the problem of deteriorating the working environment.

The present invention was created in view of the problems of the conventional repair methods, and its purpose is to:
To provide a method for inspecting the surface of a refractory by a person staying outside the furnace without directly entering the furnace, and lining the necessary places with monolithic refractories.

Another purpose is to remove any areas where local damage is expected to occur or where there will be a step on the refractory surface from outside the furnace without directly entering the furnace when the furnace is lined with refractories. The object of the present invention is to provide a method for lining the surface of the lining refractory with an unshaped refractory.

The method for lining refractories in a furnace according to the present invention includes:
The entire surface of the refractory in the furnace or any arbitrary part is divided into a plurality of parts and addresses are determined in advance, and the addresses are memorized in advance in a computer etc., and the necessary places are lined with refractories, or the said furnace The feature is that the internal refractory surface is photographed with a television camera, the surface condition of the refractory is detected for each address, and the required locations are lined with address refractories.

Examples of the present invention will be described below with reference to the drawings.
The repair of refractories in a pig iron truck will be explained as an example.

In FIGS. 1 and 2 an apparatus for carrying out the repair method according to the invention is schematically shown.
In the figure, 101 is a drive mechanism 1 having a known structure.
00 is a lance that can be moved up and down and rotated, and whose lower end can be inserted into the pig iron mixer α from the pigtail receiving port b; 102 is an arm swingably attached to the tip of the lance 101; . The arm 102 has a hollow tubular or box shape, and windows 103 and 104 are formed at the tip. At the tip of the arm 102, as shown in FIG.
An industrial television camera (hereinafter simply referred to as ITV camera) 1 is installed at a position corresponding to windows 103 and 104.
05 and lighting equipment 106 are provided. In addition, a monolithic refractory supply pipe 107 is provided on the arm 102 so as to be movable in the axial direction and rotatable. A nozzle 10 is installed at the tip of the pipe 107.
8 is installed. Swinging of the arm 102,
Axial movement and rotation of the pipe 107 is performed by the drive mechanism 100, but a portion of the drive mechanism may be provided within the lance and arm.

Note that 201 is a spray lining machine control device connected to the drive mechanism 100, 202 is a computer, and 20
3 is an external storage device, 204 is a lining section setting device, and 205 is connected to an ITV camera 105.
ITV camera controller 206 is a monitor television.

Next, the repair method of this embodiment will be explained in relation to the operation of the apparatus shown in FIGS. 1 and 2.

First, the surface of the refractory material inside the furnace to be repaired, that is, the mixer α in this embodiment, is divided into a number of sections and assigned addresses, as shown in FIG. 3, for example. The area of each part of this section does not necessarily have to be the same, and there is variation, but
It is not done by drawing lines directly on the refractory surface,
Arm 102 when photographing each part with a TV camera
(Differences in the rotation angle from the reference position of the lance 101 and the swing angle from the arm reference position) are used to determine the division by spatial positioning of the arm tip, and the address is determined by the computer 202 or externally. It is stored in the storage device 203 in advance.

Therefore, the surface of the refractory material с in the mixer α is
Lance direction when photographing with ITV camera (rotation angle of lance 101 and swing angle of arm)
Which address number is it now? You can easily see the address number when you take a picture of it, and conversely, you can use the lining section setter 204 to determine the address number. If specified, the arm will be assigned that address number.
You can point it in the direction of the camera and take pictures with the ITV camera.

The area of one section is determined by the operability of the spraying machine and the damage to the surface of the refractory in the furnace, and is approximately 0.1~
^8m2 is appropriate.

After the refractory surface has been sectioned and addressed as described above, for example, the address No. in FIG. from 1
No.．． ITV cameras sequentially took pictures up to 50, and the images and address numbers. is displayed on the monitor television 206. The worker then observes the refractory surface via a monitor TV, checks for damaged areas that require repair, and selects the address number. The lining section setting device 20 determines the amount of spray determined depending on the degree of damage.
Set to 4. Then, an operation signal is sent from the spray lining machine control device 201 to the drive mechanism 100, and as the tip of the pipe 107 approaches the damaged area on the refractory surface, the amorphous refractory is fed into the pipe, and the nozzle 108 at the tip of the pipe approaches. A predetermined amount of monolithic refractory is sprayed toward the damaged area. Therefore, the spraying status of monolithic refractories is
It can be observed sequentially by ITV camera and monitor TV. Address No. in the same manner. 50, the surface of the refractory will be observed and monolithic refractories will be sprayed onto the damaged areas.

Please note the address No. 1 to No. The sequential movement of the pointing of the arm according to up to 50 images is automatically performed by the drive mechanism under the control of the computer or external storage device and the spray lining machine control device.

In the above, observation of refractory surfaces and necessary repairs are progressed section by section, but
No.．． 1 to No. It is also possible to first conduct all the observations up to 50, and then spray monolithic refractories to the necessary locations, that is, perform repairs. In this case, whenever you find a damaged area on the monitor TV, please check the address number.
and the amount of spraying can be set in the correction zone setting device and stored in the computer 201 or the external storage device 204, and the calculation can be performed automatically based on the storage.

Furthermore, a specific section, for example, address number. From 38 to No.．． Address No. 50 to be observed when inspecting and repairing damage up to 50. The designation is made using the lining section setter, and the drive mechanism automatically photographs the designated address and sprays the monolithic refractories as described above.

If spraying repairs are to be carried out while the furnace temperature is still high, the inside of the lance and arm can be cleaned by, for example, making the lance a double pipe and passing cooling water between them, or supplying cooling air into the arm. cool,
Protect equipment such as ITV cameras and lighting equipment from heat.

Further, for locations that are not to be repaired, the spraying operation may be made to pass quickly through the addresses that are not to be repaired without stopping the spraying operation.

Further, in the embodiment, the case of spraying the monolithic refractory was shown, but the lining can also be formed by other methods such as spraying, press-fitting, and crimping with a trowel.

In the above explanation, we took repair as an example, but
When replacing the lining refractories of various types of furnaces with new refractories, the entire surface of the new refractories, or only any parts of the new refractories that are expected to be damaged, should be covered with shaped refractories, such as curved parts that join side walls and bottoms. In the case of objects, only the arbitrary part with a step is divided into multiple parts, the address is determined, and the address is memorized in advance in a computer etc., and the refractory surface of the memorized predetermined location is matched with the predetermined location. It is also included in the invention to operate the lining device while adjusting the amount of lining refractory to properly coat the new refractory surface before using the furnace.

As described above, the method for lining refractories in a furnace according to the present invention can produce the following effects.

(b) Since humans do not need to enter the furnace directly, it is possible to repair the refractories even when the furnace is at a relatively high temperature, and the time the furnace is out of use can be shortened.

(b) Automation of refractory lining becomes possible.

(c) The work environment can be improved because humans do not have to enter the furnace directly.

(d) Since there is no need to cool the inside of the furnace more than necessary, heating for furnace operation can be kept to a minimum.

(e) Furnace life can be extended because there is little temperature change in the furnace.

(F) Since the lining is divided into areas, lining can be done effectively without waste.

[Brief explanation of the drawing]

Fig. 1 is a schematic explanatory diagram of an apparatus for carrying out the method for repairing refractories in a furnace according to the present invention, Fig. 2 is a sectional view of the inside of the tip of the arm, and Fig. 3 is an example of the divisions on the inner surface of the refractories of a pig iron mixing car. FIG. 100: Drive mechanism, 102: Arm, 105:
ITV camera, 201: spray lining machine control device, 202: computer, 204: lining section setting device, 206: monitor television.

Claims (1)

[Claims] 1. The entire surface of the refractory in the furnace or any arbitrary part is divided into a plurality of parts in advance and addresses are determined, and the addresses are stored in a computer etc. in advance, and based on the stored addresses, A method for lining refractories in a furnace, characterized by lining a refractory surface at a predetermined location with a refractory by operating a lining device. 2. Divide the entire surface of the refractory in the furnace or any arbitrary part into a plurality of parts and set addresses in advance, and store the addresses in a computer etc. in advance, and move the television camera based on the stored addresses, As a result, the surface of the refractory in the furnace is photographed by a television camera, the surface condition of the refractory is detected for each address, and the surface of the refractory in the furnace at the required address is lined with refractory. Refractory lining method.