JPS6023782A - Method of making sure filling property of pouring material - 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] <Industrial Application Field> The present invention is aimed at determining whether or not the filling is reliable when hot repairing molten steel ladle, kiln, etc. by pouring monolithic refractories, and whether or not the poured This invention relates to a method for detecting the presence or absence of leakage (both are collectively referred to as filling properties) of monolithic refractories.

<Prior art> In the conventional cold construction of the above supplementary work,
As shown in Fig. 1 (a) and (b), the operator can directly check with his or her eyes whether there is any leakage 6' of the poured material, that is, the monolithic refractory 6 from the core metal frame 2, and whether it is reliably filled. However, due to the high-temperature work involved in the d-distance construction, direct observation with the naked eye is impossible.

Furthermore, water is usually used to give the pouring material fluidity and hardening properties, but this water is rapidly heated and becomes a large amount of steam, and when graphite-based pouring materials are used, black smoke is produced and these Because the view is obstructed by this, it is not possible to observe the inside of the furnace, and it is not possible to check the pre-ml filling property.

<Purpose of the Invention> Therefore, the present invention uses a core metal frame to ensure that the gap between the core metal frame and the old refractory is filled with repair pouring material. The purpose of the present invention is to provide a method for detecting whether or not there is a leakage.

<Structure and operation of the invention> The gist thereof is a method for checking the filling property of a poured material, which is characterized by detecting the failure of a kiln by pouring an amorphous refractory.

That is, in the present invention, as shown in FIGS. 2 and 3,
The conductivity of the pouring material (monomorphic refractory material) is used to detect and confirm whether hot pouring material leaks from the metal frame and whether it is reliably filled.

The conductivity is added to the pouring material, typically by 5% as a hardener.
It is given by water with ~30% addition, and graphite, silicon carbide, etc. are added to the pouring material when not in use.
It is added (2 to 3%) to the extent that it does not adversely affect the pouring material, and the additive provides electrical conductivity.

In addition, for the above-mentioned detection, one terminal of the detector is inserted and fixed at an appropriate location in the gap between the core metal frame and the old material, preferably in a localized area that has been eroded, and the other terminal is poured in to check the presence or absence of material. Install it in the areas you want to detect, such as areas where there is a risk of leakage or where it is difficult to confirm whether the product is filled.

If there is no leakage in the area where there is a risk of leakage, and if the area where filling has been confirmed is not filled, there will be no electricity between both terminals of the detector, and either there will be a leak or the material will be filled. When the other terminal of the detector is touched, electricity is conducted between both terminals, so it is possible to check whether there is a leak or not and whether the detector is reliably filled.

<Example> Next, examples according to the present invention are shown in Figs. 2 (a), (b), and 3.
This will be explained in detail based on figures (a) and (b).

The old material 1 is a molten steel ladle lining material or permanent lining material, and when repairing by pouring inside the molten steel ladle, insert the core metal frame 2 into the molten steel ladle, and pour the monthly charge 6 into the core through the charging port 5. Insert it into the gap between the metal frame and the old material. Before inserting the core metal frame into the molten steel ladle, connect the two terminals (4a, 4a,
41) )) f are each fixed at a desired position on the core metal frame 2. This core metal frame 2 is inserted into a molten steel ladle and filled with pouring material.

When inserting in hot conditions (200'C to 10001:), cover the conductor 3' with a heat-resistant insulator such as asbestos to prevent the conductor 3' from the detector 3 to the terminal from burning out due to high heat.
protect.

To fully detect the presence or absence of leakage of the terminals of the detector placed in the area to be detected, go to point 4b shown in Figure 2, and to check whether the terminal is filled or not, go to point 5 in Figure 3. 4b' shown in
By placing the terminals at the respective points, when the pouring material comes into contact with these terminals, conduction occurs between both terminals, and it is possible to detect that there is a leak and that the pouring material is reliably filled.

Although the example shows the case of a molten steel ladle, the present invention is applicable to a converter furnace, which has a complicated shape and is larger than other kilns. It can be applied to other pouring repair methods that use core metal frames, such as tundishes and hot metal pots.

Although the method of the present invention can be applied to cold pouring construction, the method of the present invention is indispensable for hot construction.

<Effects> According to the present invention, it is possible to safely and reliably detect and confirm whether there is any leakage of the pouring material and whether it is reliably filled, even in the case of hot construction. This detection allows early installation and repair of the core metal frame in the event of leakage, which greatly reduces the amount of wasted pouring material and also greatly reduces repair work time. Become.

If the filling of the pouring material is insufficient, the durability of the pouring material after repair will be greatly reduced, and in severe cases, the purpose of the repair may not be achieved at all, but the present invention prevents this. can do.

[Brief explanation of drawings]

Figure 1 (a) is an explanatory diagram of how to check for leakage during cold construction using the conventional method, and Figure 1 (b) is an explanation of how to confirm whether or not it is reliably filled during cold construction using the conventional method. figure,
The second cause is an explanatory diagram of detecting the presence or absence of leakage during hot construction according to the present invention.
B) is an explanatory diagram of a leaking state, Figure 3 is an explanatory diagram for detecting whether or not it is reliably filled during hot construction according to the present invention, and (A) is an explanatory diagram of a state where it is not filled. Figure (B) is an explanatory diagram of a state in which the container is reliably filled. 1... old material, 2... core metal frame, 3=-
Detector, 3180.・・・Conductor, 4 m ・−・=Terminal, 4 b, 4 b′ −・・One terminal, 5−・・−・
Loading port, 6... - Pouring material agent Patent attorney Masaaki Akizawa 2 people Mitsugai 1 diagram (a) 2nd neck (a) (mouth) (b)

Claims (1)

[Claims] (1) In a method of hot repairing a transformer furnace by pouring monolithic refractories, a conductive material is added to the monolithic refractories, and detector terminals are placed at appropriate locations to detect the presence or absence of electricity. A method for checking the filling properties of a pouring material.