JPH10310478A - Anchor brick for ceiling section of refuse incineration furnace - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain anchor bricks which are greatly improved in hot strength, is suppressed of cracking at the time of operation and has a long service life by forming unburned bricks by using low cement castables contg. a specific amt. of stainless steel fibers of a specific length. SOLUTION: This anchor bricks 4 to be used at the time of stamping (2: stamp material) in the sealing section of a refuse incineration furnace are the unburned bricks produced by using the low cement castables contg. 2 to 5 wt.% stainless steel fibers having the length of 10 to 30 mm and molding and drying these castables. The sealing section of the refuse incineration furnace formed by mounting such anchor bricks via anchor brick hanging parts 5 at a casing 1 of the sealing section of the refuse incineration furnace and stamping ramming refractory materials by the same method as heretofore are more greatly improved in bending strength and tensile strength as compared with the burned bricks and are enhanced in toughness as well and, therefore, the dislodgment of the anchor bricks and stamp materials is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anchor brick for improving the durability of the ceiling of a refuse incinerator.

[0002]

2. Description of the Related Art Conventionally, when stamping is performed on the ceiling of a garbage incinerator, an anchor brick 4 is hung from a casing 1 by means of a hanging part 5, and a wooden frame 3 is provided below the anchor brick 4. Etc. are set, and a plastic refractory material is stamped with an air rammer. (Fig. 1)

Generally, the anchor brick 4 is an alumina fired brick having a drum-like shape as shown in FIG. 2 and having a structure in which the stamp material 2 bites into the groove of FIG. 2A to prevent the stamp material from falling off. Has become. However, the cracking of the groove of the anchor brick 4 during operation causes a problem that the anchor brick 4 and the stamp material 2 fall off.

[0004]

In order to solve the above-mentioned problems, an investigation was made on the damage of the roof of the refuse incinerator. As a result, the ceiling of the refuse incinerator was suspended by a brick welded to the outer casing of the steel plate. Anchor bricks are attached to metal parts, and the ceiling is stamped using plastic refractory material. That is, it is used in a state of being suspended by an anchor brick.

The present invention focuses on the fact that anchor bricks are required to have an improved tensile strength due to thermal strain due to expansion and contraction under high heat during operation at the garbage incinerator ceiling. Since the improvement in up and toughness leads to the improvement of the service life of the roof of the refuse incinerator, the anchor brick is improved in material, the hot strength is greatly improved, and the cracks generated during operation are suppressed. In providing bricks.

[0006]

According to the present invention, an anchor brick for a roof of a refuse incinerator has a length of 10 stainless steel fibers.
It is characterized by being an unfired brick containing 2 to 5% by weight of ３０30 mm and manufactured using low-cement castable.

The anchor brick according to the present invention greatly improves tensile strength and hot bending strength by containing 2 to 5% by weight of stainless steel fiber having a length of 10 to 30 mm. It can withstand distortion due to expansion and contraction under high heat. In addition, the non-fired brick made of low-cement castable made a dense material, and greatly improved the strength up and toughness.

When the length of the stainless steel fiber is less than 10 mm, the effect of improving the tensile strength is small, and when the length is more than 30 mm, it is too long to make the production difficult. If the content is less than 2% by weight, the strength retention effect is low, and if it is more than 5% by weight, it may hinder the production of anchor bricks using low-cement castables. As the stainless steel fiber, a heat-resistant metal fiber can be used in addition to stainless steel.

[0009] The garbage incinerator ceiling, which is mounted on the casing of the garbage incinerator ceiling using the anchor brick according to the present invention via a hanging portion of the anchor brick, and stamped with a ramming refractory material in the same manner as in the prior art. During operation, the anchor brick of the present invention contains stainless steel fiber,
The non-fired brick made of cement castable has greatly improved bending strength and tensile strength compared to fired brick, and has also improved toughness, so that cracking of anchor brick is suppressed, and anchor brick and It was possible to prevent the stamp material from falling off.

[0010]

EXAMPLES The present invention will be described with reference to examples. Table 1 shows the quality characteristic values of the anchor bricks of the present invention and the quality characteristic values of comparative products.

[Table 1]

An anchor brick having the shape shown in FIG. 2 is poured by using a low cement castable having a mullite composition of 65% by weight of Al ₂ O ₃ added with 3% by weight of stainless steel fiber of the present invention shown in Table 1. It was molded, demolded and dried to prepare an unfired brick trash incinerator ceiling anchor brick.

A practical test was conducted using the anchor brick of the present invention. Alumina-based calcined anchor with the characteristic values shown in Table 1 of the conventional product is installed on the ceiling of a garbage incinerator with a throughput of 50 ^T / _D.
Compared to brick, it was attached to the anchor-hanging part and stamped using plastic refractory material.

[0013]

As a result of using the anchor brick for the garbage incinerator ceiling of the present invention side by side with the conventional product on the ceiling of a garbage incinerator with a throughput of 50 ^T / _D , the temperature inside the garbage incinerator was 900.
At about 1000 ° C., the anchor brick of the conventional product cracked after being used for about one year and dropped off together with the stamp material, but the product of the present invention did not show any cracks. It can be used for 2 years without falling off the anchor brick and stamp material, showing twice the service life as compared with the conventional product, and a great improvement was recognized.

[Brief description of the drawings]

FIG. 1 is a conceptual view of stamping of a garbage incinerator ceiling part according to the present invention.

FIG. 2 is a cross-sectional view of the anchor brick of the present invention.

[Explanation of symbols]

 1 Casing of garbage incinerator 2 Stamp material 3 Formwork 4 Anchor brick 5 Anchor brick hanging part

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Toshikazu Koma 2669-2 Hida, Hida-cho, Toki-shi, Gifu

Claims (1)

[Claims] 1. An anchor brick used for stamping at a furnace ceiling of a refuse incinerator contains 2 to 5% by weight of a stainless steel fiber having a length of 10 to 30 mm.
Anchor bricks for garbage incinerator ceilings, characterized by unfired bricks manufactured using cement castables