耐火磚知識與新聞
09
2012-09
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09
2012-09
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09
2012-09
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08
2012-09
??? 堿性耐火磚挖補(bǔ)主要指鎂鉻磚和尖晶石磚的挖補(bǔ)。其在修補(bǔ)時應(yīng)該注意以下幾個方面的問題。1)補(bǔ)耐火磚必須采用與舊磚相同廠家相同批次的磚;2)盡可能使用與舊磚同一次檢修的剩余散磚(注:受潮或摔損的磚嚴(yán)禁使用);3)新老磚的接觸···
08
2012-09
??? 目前,氧氣轉(zhuǎn)爐爐襯使用的耐火磚主要是含碳的堿性耐火磚,如焦油白云石磚、焦油鎂白云石磚、焦油鎂磚、鎂碳磚和各種浸漬磚等。另外,還有噴補(bǔ)用的耐火噴涂料。從采用氧氣轉(zhuǎn)爐煉鋼以來,各國普遍用鎂質(zhì)和白云石質(zhì)耐火磚作爐襯,···
08
2012-09
加熱爐爐體的砌耐火磚規(guī)格及尺寸應(yīng)按磚的尺寸加灰縫厚度來計(jì)算。在設(shè)計(jì)中耐火磚砌體的垂直砌筑尺寸為68mm的倍數(shù);水平砌筑尺寸為116mm的倍數(shù)。由爐子各部位要求的灰縫不同及耐火磚本身存在公差所產(chǎn)生的誤差,可通過加人T-l、T-Z、T-4等···
08
2012-09
耐急冷急熱的測定方法,根據(jù)部頒標(biāo)準(zhǔn)是將欲測定的耐火磚試樣加熱到850℃,然后放入冷水中急速冷卻(如試樣不宜在水中冷卻,則可以置空氣中冷卻)。如此重復(fù)急速加熱和冷卻,待耐火磚表層崩裂和脫落而損失的重量達(dá)到原試樣重量的20%為止···
07
2012-09
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07
2012-09
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07
2012-09
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06
2012-09
弓形拱頂采用拱腳耐火磚或冷卻的金屬拱腳。拱腳耐火磚的尺寸首先決定于所砌弓形拱頂?shù)闹行慕强?。為便于?jì)算及標(biāo)準(zhǔn)化起見,一般采用這樣幾種標(biāo)準(zhǔn)中心角,60o、70o、90o及120o。任何一個拱腳耐火磚事實(shí)上包括一個直角三角形,即拱腳耐火磚···
06
2012-09
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06
2012-09
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05
2012-09
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05
2012-09
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05
2012-09
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04
2012-09
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04
2012-09
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04
2012-09
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04
2012-09
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