JPS60162181A - Method of observing refractory in furnace - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention involves dividing the surface of refractories in various furnaces such as mixed pig iron tunnels, converters, DH furnaces, and RH furnaces into sections of several tens of meters in size and defining belt areas. This article relates to a method for observing the inside of a furnace by photographing it with a television camera.

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 by entering the furnace after the refractories had cooled to room temperature. If there is a part that requires repair, the operator enters the furnace with the spray nozzle of the repair machine, and manually operates the repair machine to spray the damaged part with a monolithic refractory. They were repairing it by spraying it with material.

However, with this method of refilling candy, humans must go directly into the furnace to inspect and repair damaged parts. It took a long time to complete inspections and repairs, which caused problems that lowered the furnace's operating rate.Additionally, the work environment worsened because monolithic refractories were injected from nozzles within an enclosed area. There is also the problem of doing so.

Also, do not cool the furnace to room temperature (i.e., when hot,
In some cases, the decision to repair or shut down the furnace was made by observing and detecting the problem directly from outside the furnace.

In the case of this method, for example, in mixed pig iron, blast furnace, coke oven, D
For H furnaces, RH furnaces, etc., which have parts that are not directly visible or difficult to see inside, a television camera was inserted for observation.

However, if you change the insertion position or the shooting position of the TV camera, you will not be able to tell which part of the furnace is located on the monitor TV. Although it was possible to find out the location by doing so, it was beyond estimation (and it took a long time. Also, this method was limited by the structure of the reactor.

The present invention has been developed to address the problems of the conventional furnace interior observation method, and its purpose is to provide a method for accurately inspecting the surface of refractories from outside the furnace. be.

The method for observing refractories in a furnace according to the present invention includes dividing the entire surface or any arbitrary portion of the refractory in a furnace into a plurality of parts, determining addresses, and storing the addresses in a computer or the like in advance.
There is a hint in the fact that 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 condition of the major object in the furnace is observed.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples of the present invention will be described below with reference to the drawings, taking as examples the observation of mixed pig iron and refractories.

1 and 2, an apparatus for carrying out the in-furnace observation Jj method according to the present invention is schematically shown. In the figure, 101 is a drive mechanism 100 of a known structure.
lance, which is adapted to be moved downward and rotated, and whose lower end can be inserted into the pig iron mixer wheel a;
02 is an arm that is swingably attached to the tip of the lance 101.

The arm 102 has a hollow tubular or box shape, and windows 103, ] 04 are formed at the tip. At the tip within the arm 102 is a window 10, as shown in FIG.
An industrial television camera (hereinafter simply referred to as an ITV camera) 05 and a lighting fixture 106 are provided at positions corresponding to 3 and 104. Further, a monolithic refractory supply pipe 107 attached to the arm 102 is provided so as to be movable in the axial direction and rotatable. Vibrator 1
A nozzle 108 is attached to the tip of 07. Is the swing of the arm 102 and the axial movement and rotation of the pipe 107 performed by the drive mechanism 100?1. Part of the drive mechanism may be provided within the lance and arm.

Note that 201 is the drive mechanism 1. The attached sprayer connected to On is the lining machine control device, 202 is the computer, 203 is the external storage device + 1.204 is the attached lining section setting device, 205 is the ITV camera controller connected to the ITV camera 105, and 206 is the monitor. It's television.

Next, the observation 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 C inside the furnace to be observed, that is, the pig iron mixer a in this embodiment, is divided into a number of sections, for example, as shown in FIG. 3, and the sections are numbered 1-. The area of each part of this section does not necessarily have to be the same and may vary, but it is not necessary to draw a line directly on the surface of the refractory. Difference in orientation (difference in rotation angle of the lance 101 from the reference position and swing angle of the arm from the reference position)
The division is determined by spatial positioning of the tip of the arm using , and the address is stored in the computer 202 or the external storage device 203 in advance.

Therefore, when the surface of the refractory C in the pig iron mixer a is photographed with an ITV camera, which address Af('l
Find out right away if it's in your shadow 1. Conversely, when a number spot is designated using the lining section setting device 204, the arm can be directed toward the location and photographed using the ITV camera.

The area of one section is determined by the operability of a lining device such as a drive mechanism or an attached spray machine, and the lateral movement of the surface of the refractory in the furnace, and is suitably about 0.1 to 8 m.sup.2.

After the refractory surface has been divided and determined as described above, for example, images are sequentially taken with an ITV camera from address 16.1 to address 50 in Figure 3, and the images and address points are displayed on a monitor TV. It will be displayed on 206. The worker then observes the refractory surface via a monitor TV and checks for damaged areas.

Thereafter, the surface of the refractory was observed in the same manner up to number point 50 (.

In addition, the sequential operation of the arm's orientation according to the photographing of numbers 1 to 550 is automatically performed by a drive mechanism based on the computer or external storage device and the attached spray lining machine control device based on L'A11 group 11. Act wisely.

1-, the observation of the refractory surface is progressed section by section. I'm trying to do two things, but you can also do all the intermediaries from 1 to 50 in advance.

Suq K! 1; i fixed section, 1-11, 4-ft from address 38 to 50 1. When inspecting City I, it is also possible to use a designated lining section setter for the area to be observed and to automatically photograph the designated address using the 1.1 drive mechanism.

If observation is to be carried out while the furnace temperature is high, cool the inside of the lance and arm by, for example, making the lance a double tube and passing cooling water between them, or supplying cooling air into the arm. , ■Protect equipment such as TV cameras and lighting equipment from heat.

Further, for locations that do not require observation, the arm may be made to quickly pass through the addresses that are not to be observed, without stopping the arm.

Further, in the fifth practical example, a device is used for spraying the monolithic refractory, and a single drive device is shown, but it may also be installed in conjunction with other devices such as a crimping device using a projection, press-fitting, or trowel. Moreover, it can be used as an independent drive device without being attached to the lining device.

As described above, the in-furnace 1ni (large object observation method) according to the present invention can produce the following effects.

(b) Even in a high-temperature furnace, the observation position of a one-sided large object can be accurately determined.

(b) Accordingly, observation time can be shortened.

(c) Therefore, the time when the furnace is stopped due to VC can be shortened.

(2) Since it is not necessary to cool the inside of the furnace for an unnecessarily long period of time, 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) Automation of reactor wall observation becomes possible.

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

[Brief explanation of drawings]

Fig. 1 is a schematic explanatory diagram of an apparatus for carrying out the method for observing refractories in a furnace according to the present invention, Fig. 2 is a sectional view of the tip of the arm, and Fig. 3 is an example of the divisions on the inner surface of the refractory of a pig iron mixing car. FIG. 10 (1: Drive mechanism 102: Arm 105: ■TV camera 20J: Spraying lining machine control device 202: Computer 204 Ni lining section setting device 206: Monitor TV Patent applicant Sumitomo Metal Industries Co., Ltd. Kurosaki Ceramics Co., Ltd. / figure

Claims (1)

[Claims] 1) Divide the entire surface of the refractory in the furnace or a part of the refractory into multiple parts and determine the inspection area, store the address in advance in a computer, etc., and photograph the surface of the refractory in the furnace with a television camera. A method for observing refractories in a furnace, which is characterized by detecting the surface condition of refractories for each blue area.