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摘要
鎂碳磚是70年代初出現(xiàn)的，先是在超高功率電爐，接著在轉(zhuǎn)爐、爐外精煉爐上使用，獲得了非常好的效果。由此，人們才認(rèn)識(shí)到石墨、碳素材料和高溫耐火氧化物之間結(jié)合所產(chǎn)生的作用。斷裂韌性差、高溫剝落、抗渣滲透性差，這是高溫?zé)赡突鹬破返闹旅秉c(diǎn)，含碳耐火制品的出現(xiàn)突破了這些弱點(diǎn)。在鎂碳磚中氧化鎂和石墨之間彼此相互包裹，不存在傳統(tǒng)概念中的所謂燒結(jié)；石墨具有熱傳導(dǎo)系數(shù)高，彈性模量低，熱膨脹系數(shù)小，不容易被熔渣
浸潤(rùn)等優(yōu)點(diǎn)，因此，由于石黑的引入，使?fàn)t襯耐火制品的斷裂韌性和抗渣滲透性有本質(zhì)的改善。鎂碳磚的主要特征是在微觀結(jié)構(gòu)上形成碳的結(jié)合物，這種結(jié)合是由有機(jī)結(jié)合劑在高溫下結(jié)焦碳化形成的。
關(guān)鍵詞：鎂碳磚，生產(chǎn)工藝，車間設(shè)計(jì)
Abstract
Magnesia carbon brick is appeared in the early 70 s, first in ultra high power electric furnace, and then used in the converter, the refining furnace stove, obtained the very good effect. As a result, people realize the combination between graphite, carbon materials and high temperature refractory oxide generated by the function. Poor fracture toughness, high temperature peeling, slag resistance is poor, it is high temperature firing the fatal defects of refractory products, carbon refractory products breakthrough of these weaknesses. Magnesium oxide in magnesia carbon brick each other between graphite and packages, there is no so-called sintering in traditional concept; Graphite with high heat transfer coefficient, low elastic modulus, thermal expansion coefficient is small, not easy to slag
Infiltration, etc, therefore, due to the introduction of the graphite, the fracture toughness of lining refractory products and the nature of the resistance to slag penetration has improved. The main characteristic of magnesia carbon brick is in the combination of the carbon content is formed on the microstructure, the combination is formed by coking organic binder in high temperature carbonization.
Key Words: Magnesia carbon brick, production technology, workshop design