JPH01121685A - Method of constructing kiln - Google Patents

Abstract

PURPOSE: To construct a furnace quickly and easily by packing irregular refractories, after hardening a self-hardening organic solution being thrown thereon as an expansion margin, packing irregular refractories further thereon. CONSTITUTION: At first, irregular refractories are thrown between an iron skin 4 and an inner frame 1 from above and paced up to a specified height. A self-hardening organic solution is then thrown thereon until an expansion margin is obtained. When the solution 3 is hardened to have some strength, irregular refractories are further packed thereon. In case of high furnace wall, the work is repeated to construct all furnace wall. According to the method, even such a furnace as having high wall or containing anchor bricks or studs can be constructed easily. Furthermore, the furnace wall can be repaired easily by supplying the organic solution according to the irregularities on the wall surface.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a method for constructing a kiln using a monolithic refractory.

(Prior Art) The construction of kilns using monolithic refractories has many advantages over conventional brick masonry, such as easier construction and lower material costs, and the scope of its use has been expanding recently.

Monolithic refractories are built as a single piece, so if used as is, the furnace walls will crack due to thermal expansion caused by high-temperature heating during furnace operation. Therefore, it is known to form expansion allowances in advance at appropriate intervals (for example, "
“Kiln Furnace Engineering” April 1982, 308. (Published by Refractory Technology Association, p. 253).

(Problems to be Solved by the Invention) Conventional expansion allowances are achieved by interposing a plate-like or sheet-like combustible material in the monolithic refractory, and burning and burning the combustible material by operating a furnace or drying it. The resulting voids absorb thermal expansion of the refractory.

However, irregularly shaped and large objects must be introduced from a narrow area surrounded by formwork, and if the height of the furnace wall is high, or if the furnace wall has anchor bricks, studs, etc. It is not easy to drive through combustible materials such as Furthermore, when constructing a molten metal container to repair a furnace wall, the shape of the combustible material must be determined to match the unevenness of the remaining wall surface, which is cumbersome.

(Means for solving the problems) The present invention aims to solve the above-mentioned drawbacks of the conventional method, and the gist thereof will be explained with reference to the drawings of the embodiments.
In construction using monolithic refractories 2, after the monolithic refractories 2 are driven to a certain height, a self-hardening organic solution 3 is poured into the upper surface as an expansion allowance, and this organic solution 3 hardens. This method of constructing a kiln is characterized in that, once the refractory material has a certain degree of strength, a monolithic refractory material 2 is further placed on top of the refractory material.

Even when repairing a furnace wall, the organic solution 3 spreads according to the unevenness of the remaining wall surface, and the expansion margin is formed more quickly and accurately than in the conventional method.

(Example) Embodiments of the present invention will be described below based on the drawings.

In FIG. 1, 4 is an iron shell that becomes the outer shell of the furnace, and 1 is a formwork. The formwork 1 is generally equipped with a vibrator 5 to facilitate filling with the monolithic refractory 2. This embodiment deals with a furnace wall provided with studs 6 for reinforcing the furnace wall.

During construction, first, between the iron skin 4 and the inner frame 1.

An amorphous refractory 2 is introduced through the upper opening and driven to a certain height, and then a self-hardening organic solution 3 is introduced onto the upper surface. The amount to be added is sufficient to obtain the thickness required for expansion. The thickness of the expansion allowance is, for example, 1 to 3
It is about 1. Further, the specific material of the organic solution 3 used here is not particularly limited, but urethane resin, heated and melted paraffin, etc. are preferable in terms of workability.

When the organic solution 3 hardens on the upper surface of the monolithic refractory 2 and has a certain degree of strength, the monolithic refractory 2 is further applied on top of it.
If the furnace wall is high, the entire furnace wall is constructed by repeating the driving of the monolithic refractories 2 and the injection of the organic solution 3 alternately in the height direction.

After the organic solution 3 as an expansion allowance is introduced, it spreads over the upper surface of the monolithic refractory 2 due to flow, so even if there are anchor bricks, studs, etc., or the height of the furnace wall is large, the expansion allowance can be easily reduced. can be formed.

After drying, the furnace wall is used after removing the formwork 1 and heating and drying it if necessary. The expansion allowance member formed by hardening the organic solution 3 is burnt out when it is heated and dried in a furnace or heated during operation, creating voids as an expansion allowance.

By the way, when an organic solution is poured from a high place, it sometimes scatters and adheres to the steel shell 4 and formwork 1, or digs into the upper surface of the monolithic refractory 3. In the embodiment shown in FIG. 2, this problem is solved, and the organic solution 3 is introduced through the through hole 7 provided in the formwork 1.

(Effects of the Invention) As described above, the present invention uses an organic solution to form an expansion margin, so that it can be used when the height of the furnace wall is high.

Even if there are anchor bricks or studs, it can be easily constructed. Furthermore, even if the construction involves repairing a furnace wall, the organic solution flows and spreads according to the unevenness of the remaining wall surface, making it possible to quickly form an accurate expansion margin.

Therefore, according to the present invention, there is an effect of further improving the speed and ease of the method of constructing a kiln using a monolithic refractory.

Note that the present invention relates to a soaking furnace, a heating furnace, a ladle, a tongue pusher,
It can be applied to the construction of other industrial kilns.

[Brief explanation of the drawing]

FIG. 1 and FIG. 2 are vertical cross-sectional views of a furnace wall for explaining an embodiment of the present invention. 1 Formwork 2 Unshaped refractory 3 Organic solution 4 Iron shell 5 Vibrator 6 Stud 7 Through hole Fig. 1 4: Iron shell 7: UI Fig. 2

Claims (2)

[Claims] (1) In construction with monolithic refractories 2 using formwork 1, after casting monolithic refractories 2 to a predetermined height, a self-hardening organic solution 3 is poured into the upper surface as an expansion allowance, This method of constructing a kiln is characterized in that once this organic solution 3 has a certain degree of strength through hardening, a monolithic refractory 2 is further poured thereon. (2) The method for constructing a kiln according to claim 1, in which the organic solution is introduced through the through hole 7 formed in the formwork 1.