A type of unshaped refractory. A clay-like mixture of fire-resistant aggregate, fireclay, and other binders, mixed with water. It generally hardens when dried and fired. It is used at the construction site by hammering it into the required shape with a hammer or mallet. Because it is a kneaded product, it is easy to construct and it is possible to create a furnace body without joints, and there is no risk of cold air entering, hot gas leaking, or collapse from joints like in firebrick structures. If necessary, it can be reinforced with steel frames, etc. In addition, it has many advantages, such as easy repair of damaged areas and no need for skilled labor. The types and uses are as follows: (1) For medium-heat clayey materials The aggregate is chamotte (clayey raw materials that have been calcined once), and the maximum safe use temperature is 1300 to 1400°C. Walls, ceilings, and floors of general kilns. (2) For high-heat clayey materials The aggregate is chamotte, 1400 to 1500°C. Boilers and melting furnaces. (3) High-alumina aggregate, high-alumina chamotte, 1600-1650°C, ceiling, wall, floor of high-temperature furnace combustion chamber. (4) Chromium aggregate, chromite, 1500-1600°C, boiler water wall, heating furnace, hearth, etc. Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information |
不定形耐火物の一種。耐火性の骨材と耐火粘土その他の粘結材に,水を加えて練った練り土状のもの。一般に乾燥,焼成すると硬化する。施工現場で,ハンマーや木槌などで所要の形状に打込んで使用する。練りものなので,施工がたやすく,継ぎ目なしの炉体をつくることも可能で,冷気の侵入や,熱ガスの漏出,または耐火煉瓦構造のような目地からの崩壊がない。必要に応じて,鉄骨などの補強もできる。そのほか,損傷個所だけの補修も容易であり,熟練技能を必要としないなどの利点が多い。種類と用途は次の通り。 (1) 粘土質中熱用 骨材はシャモット (粘土質原料を一度 煆焼したもの) ,最高安全使用温度 1300~1400℃。一般窯炉の壁,天井,床。 (2) 粘土質高熱用 骨材,シャモット,1400~1500℃。ボイラ,溶解炉。 (3) 高アルミナ質 骨材,高アルミナ質シャモット,1600~1650℃,高熱炉燃焼室の天井,壁,床。 (4) クロム質 骨材,クロム鉄鉱,1500~1600℃。ボイラ水冷壁,加熱炉,炉床その他。
出典 ブリタニカ国際大百科事典 小項目事典ブリタニカ国際大百科事典 小項目事典について 情報 |
<<: Plastic waste - Plastic waste (English spelling)
>>: Plastic molding processing - Plastic molding processing
… [Ken Ogata]. . … *Some of the terminology that ...
…He built magnificent buildings such as the Bronz...
A volcano belonging to the Klyuchev Volcanoes in t...
A museum in Istanbul, Turkey. Founded in 1846 and ...
A marine fish of the family Scutigeridae in the or...
The highest educational institution in China for t...
…In practice, therefore, instead of using underwa...
… Deserts can be classified into sandy deserts, g...
It is a device designed to absorb all the energy o...
A Meiji-era thinker on freedom and civil rights. ...
Year of death: September 15, 1632 (October 28, 163...
...His childhood name was Fukuzo. He became a dis...
…Some species are active in the early morning, du...
...After that, shops selling Nara tea were establ...
…Today, castanets are often used in flamenco perf...