国产成人AV大片大片在线播放

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未來耐火材料發展的新方向

發布:安陽坤鑫達冶金耐材有限公司瀏覽:989次

耐火材料產品的好壞主要還是看原材料如何?想要提高目前耐火材料的各項產品性能,我們還要從原材料入手?;谀壳澳突鸩牧系膹陌l,今后耐火原材料的研發及創新,應該把握以下幾個方面:1、長壽、低耗的鋼包系統用耐材;2、高效連鑄連軋系統用耐材;3、爐外精煉系統用耐材;4、高性能不定形耐火材料;5、適應新施工方法的耐材;6、水泥、有色、石化和陶瓷等工業關鍵設備和關鍵部位用耐材;7、有利于環保和生態的耐材等。

未來耐火原料將以高純為主,天然精選和人工合成并用。開發利用“三石”原料,即紅柱石、硅線石、藍晶石原料,可以改善鋁硅系耐火材料的顯微結構和熱力學性能。由于“三石”在高溫下相變為莫來石,而莫來石膨脹系數較小,有利于提高材料的抗熱震性。在材料中添加紅柱石能相變形成熱應力擴散的無數細微空隙,使得耐火材料內的應力得到釋放,從而提高了抗熱震性。而硅線石完全莫來石化的溫度較高,有利于提高高溫抗蠕變性。此外,因莫來石化伴隨產生的體積膨脹效應也對高溫抗蠕變有利。優質合成耐火原料的開發,發達國家的天然原料使用量在減少,而高純合成原料用量在不斷增加,其原因是大量使用合成原料的不定形耐火材料比例在增加,而大量使用天然原料的粘土磚、高鋁磚、鋯英石磚的產量在減少。


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    国产成人AV大片大片在线播放
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