本文選題：鋁鎂碳磚　切入點(diǎn)：應(yīng)用　出處：《西安建筑科技大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：鋁鎂碳磚具有高溫性、抗渣性和抗剝落性能良好等特點(diǎn),國內(nèi)外在鋼包中應(yīng)用較多。隨著連鑄和爐外精煉等現(xiàn)代煉鋼技術(shù)的推廣應(yīng)用以及潔凈鋼產(chǎn)量的增加,鋼包耐火材料的使用條件變得更加惡劣,鋼水溫度的升高、鋼水在鋼包內(nèi)停留時(shí)間的延長、鋼水和熔渣對(duì)鋼包耐火材料的沖刷以及熔渣對(duì)鋼包耐火材料的化學(xué)侵蝕等都更加嚴(yán)重,制約了鋼包壽命的提高,延長鋼包使用壽命尤為迫切。為了進(jìn)一步提高鋁鎂碳磚鋼包的使用壽命和使用效果,本文主要致力于高性能長壽命鋁鎂碳磚的研制開發(fā)與應(yīng)用,研究內(nèi)容主要有以下幾個(gè)方面:1.鎂砂加入形式、加入量對(duì)鋁鎂碳磚性能的影響;2.鎂砂粒度對(duì)材料性能的影響;3.α-Al_2O_3微粉的加入量對(duì)抗渣侵蝕性的影響;4.防氧化劑種類和加入量對(duì)抗氧化性能的影響。研究結(jié)果表明:鋁鎂碳磚中MgO的加入部分采用預(yù)反應(yīng)尖晶石形式能改善鋁鎂碳磚性能。采用加入MgO通過燒結(jié)反應(yīng)生成尖晶石時(shí),隨著MgO細(xì)粉加入量的增加,MgO與Al_2O_3反應(yīng)逐漸生成尖晶石的數(shù)量增多,MgO與Al_2O_3反應(yīng)生成尖晶石體積膨脹,表現(xiàn)在鋁鎂碳磚產(chǎn)生的體積膨脹不斷地增加,但尖晶石生成產(chǎn)生的體積膨脹可使基質(zhì)致密化程度提高。以3.5%熱塑性酚醛樹脂作結(jié)合劑,加入5%的α-Al_2O_3微粉,采用特級(jí)礬土熟料、鎂砂、石墨等作為主要原料,添加劑為金屬硅和金屬鋁復(fù)合抗氧化劑,制成高性能鋁鎂碳磚用于鋼包內(nèi)襯,在馬鋼三鋼70噸鋼包現(xiàn)場(chǎng)試用結(jié)果表明,使用包齡可以達(dá)到100次,遠(yuǎn)高于原先使用的鋁鎂澆注料鋼包平均65次的使用壽命,減少了澆注料包結(jié)構(gòu)剝落帶來的使用安全風(fēng)險(xiǎn),提高了鋼包熱周轉(zhuǎn)效率,同時(shí)大幅縮短了烘烤時(shí)間,實(shí)現(xiàn)了節(jié)能減排的效果。研制的高性能鋁鎂碳磚充分發(fā)揮了其抗?jié)B透性能、抗渣侵蝕和抗剝落性能等特點(diǎn),滿足生產(chǎn)、施工的要求,取得了較好的環(huán)保、經(jīng)濟(jì)和社會(huì)效益。
[Abstract]:Aluminum-magnesia-carbon brick has the characteristics of high temperature, good slag resistance and peeling resistance, and is widely used in ladle at home and abroad. With the popularization and application of modern steelmaking technology such as continuous casting and off-furnace refining, and the increase of clean steel output, The use conditions of refractory in ladle become worse, the temperature of molten steel rises, and the residence time of molten steel in ladle is prolonged. The erosion of molten steel and slag to refractory material of ladle and chemical erosion of slag to refractory material of ladle are more serious, which restrict the improvement of ladle life. It is particularly urgent to prolong the service life of ladle. In order to further improve the service life and effect of the ladle of aluminum, magnesia and carbon brick, this paper mainly devotes to the research and development and application of high performance and long life aluminum magnesia carbon brick. The main contents of the study are as follows: 1.The form of magnesia addition, Effect of addition amount on properties of aluminum-magnesia carbon brick. Effect of granularity of magnesia sand on material properties. Effect of addition of 偽 -Al _ 2O _ 3 micro-powder on slag corrosion resistance. Effect of type and amount of anti-oxidant on oxidation resistance. The results show that:. The properties of Al-MgO-C brick can be improved by the addition of MgO in the form of pre-reactive spinel. When the addition of MgO is used to produce spinel by sintering reaction, With the increase of the content of MgO fine powder, the amount of spinel formed by the reaction of MgO with Al_2O_3 gradually increased. The volume expansion of spinel formed by the reaction of MgO with Al_2O_3 was manifested in the increasing volume expansion of Al-MgO / Mg-C brick. However, the volume expansion produced by spinel formation can increase the densification degree of matrix. With 3.5% thermoplastic phenolic resin as binder, 5% 偽 -Al _ 2O _ 3 micropowder was added, and special grade bauxite clinker, magnesite, graphite and so on were used as main raw materials. Aluminum-magnesia-carbon brick with high performance is made from metal silicon and metal aluminum composite antioxidants to be used in ladle lining. The field trial results of 70 tons ladle at Masteel show that the ladle life can be up to 100 times. The service life of the ladle is much higher than that of the aluminum-magnesium castable ladle, which reduces the safety risk caused by the spalling of the castable ladle structure, improves the hot turnover efficiency of the ladle, and greatly shortens the baking time. The high performance aluminum-magnesia-carbon brick has fully developed its characteristics of impermeability, slag erosion resistance and peeling resistance, and has met the requirements of production and construction, and has achieved better environmental protection, economic and social benefits.
【學(xué)位授予單位】：西安建筑科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TQ175.7;TF341

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本文編號(hào)：1635344