共查询到20条相似文献,搜索用时 62 毫秒
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本以正交实验为手段,研究了高铝质超低水泥浇注料的六个主要组成因素对表征其流动性能的自流值的影响,并对高铝质超低水泥浇注料采用自流自工艺施工成型的可行性及必要条件进行了探讨。 相似文献
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阐述了新型早强高铝质浇注料在φ650轧机燃油推钢连结式加热炉上应用的经验,克服了砌砖炉体的整体性,密封性和保温性差,炉子升温慢,产量低,能耗高、寿命短、修炉费用高等一系列缺点,使用效果良好,经济效益显著,同时介绍了浇注料炉体设计,施工和烘炉要点等。 相似文献
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三轧分厂650轧机1~#燃油连续式推钢加热炉于1990年底改造前,高温段炉顶、炉墙用高铝质耐火砖,炉底用镁砖等,低温段炉顶、炉墙和炉底用粘土质耐火砖等砌筑的复合炉体.由于炉体整体性、密封性和保温性能差,炉子升温慢、产量低、能耗高、炉子寿命短、修炉费用高.1991年1月该炉中修,采用武汉冶金建筑研究所研究、山西省阳泉市冶金耐火材料厂生产的ECA—175型和CA— 相似文献
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摘要:由于高铝低硅CaO-Al2O3系熔渣对耐火材料的侵蚀损毁影响高铝含量低密度高强钢的安全冶炼生产,为此通过在刚玉质浇注料中引入六铝酸钙,开展六铝酸钙质浇注料与高铝低硅CaO-Al2O3系熔渣反应实验,并与铝镁浇注料进行对比研究了其作用行为。实验结果表明:刚玉 六铝酸钙浇注料具有优异抗渣性能。这主要是由于熔渣中大量的CaO被消耗,间接提高了熔渣黏度,并与刚玉 六铝酸钙浇注料反应生成的高熔点相CA2填充了气孔,阻挡了熔渣的渗透,实验结果与热力学模拟计算结果相吻合。六铝酸钙浇注料自身气孔率高,熔渣主要以渗透形式对六铝酸钙耐火材料造成破坏。因此,将刚玉骨料与六铝酸钙基质组合是有望成为低密度高强钢冶炼用钢包内衬候选耐火材料。 相似文献
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Due to the corrosion of CaO-Al2O3 based slags on refractory materials is related to the safe smelting of low-density and high-strength steel with high aluminum, the reaction experiment of calcium hexaaluminate castables with high-alumina and low-silicon CaO-Al2O3 based slag was carried out by introducing calcium hexaaluminate into corundum castables, and it was compared with that of alumina magnesia castable. The experimental results agreed with that of thermodynamic simulation and show that corundum calcium hexaaluminate castable has excellent slag resistance. Because the corundum calcium hexaaluminate castable reacted with the CaO Al2O3 based slag and produced high melting point phase CA2, which consumed a large amount of CaO in the slag and increased the viscosity of the slag, and CA2 filled the pores and blocked the penetration of slag. The wear mechanism of the calcium hexaaluminate castable is slag infiltration due to the higher porosity. Therefore, the combination of corundum aggregates and calcium hexaaluminate matrix is expected to be a candidate refractory material for ladle lining of low density and high strength steel smelting. 相似文献
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以焦宝石、陶粒为骨料 ,高铝水泥作结合剂及采用复合早强剂 ,研制成功高强陶粒浇注料。该浇注料具有早强、保温性能好、耐磨性能好、体积密度小、施工性能好等特点 ,在工业中应用效果良好 相似文献
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铝土矿、氧化铝主要是用于生产金属铝,其次还应用于耐火材料、磨料、水泥、化学产品、塑料、钢铁、陶瓷等。本文着重介绍铝土矿、氧化铝的其他用途,即用作粘合剂、密封剂、吸附剂、催化剂及催化剂载体、压力支撑料和路面填料等的使用情况。 相似文献
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由于化学侵蚀和热损伤的作用,水泥窑内衬寿命降低,导致窑炉的利用率较低,高铝质不烧砖的应用可以满足中小型水泥窑的需求,并取得较好的经济效益。 相似文献
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摘要:钢中添加适量铝元素可以提高其韧性与耐腐蚀性,但在冶炼过程中会影响炉渣中Al2O3含量而改变其与现行铝镁质浇注料的界面反应,制约钢种冶炼及品质提升。因此,采用静态坩埚法开展铝镁质浇注料的抗CaO-Al2O3-SiO2渣蚀实验,并结合热力学模拟计算探究Al2O3含量(w(CaO)∶w(Al2O3),C/A)变化对耐火材料渣蚀的影响规律,得到以下结论:随着熔渣中Al2O3含量的增加,铝镁质浇注料与熔渣反应界面越易形成更厚的高熔点隔离层,将耐火材料组分向熔渣中的直接溶解转变为间接溶解,有利于提升铝镁质浇注料的抗侵蚀性;当渣中的Al2O3质量分数在32%左右时,熔渣的侵蚀性总体较弱,但当渣中的Al2O3质量分数不小于36%时,熔渣对铝镁质浇注料产生了严重的渗透性,也易造成材料变质剥落。这为面向含铝钢冶炼用耐火材料的优化设计提供参考。 相似文献
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The toughness and erosion resistance of steel can be improved by adding an appropriate amount of aluminum. However it will increase the content of Al2O3 in slag and react with the existing alumina magnesia castable, and affect smelting and quality of steel. Therefore, static crucible method was applied, corrosion experiments of the CaO-Al2O3-SiO2 slags on the alumina magnesia castable were carried out, and the influence of Al2O3 content (w(CaO)∶w(Al2O3), C/A ratio) on slag corrosion resistance was investigated by combining thermodynamic simulation. The following conclusions were obtained: with the increase of Al2O3 content in the slags, the thicker isolation layer with high melting point is easier to form at the reaction interface between alumina magnesia castable and the slags. The direct dissolution of the refractory components into the slags can be changed to indirect dissolution, which is conducive to improving the corrosion resistance of alumina magnesia castable. Nevertheless, when the content of Al2O3 in the slag is about 32 wt.%, the slag corrosion is generally weak, when the content of Al2O3 in the slag is more than 36 wt.%, the slag has serious permeability to the alumina magnesia castable, which is easy to cause the deterioration and spalling of the material. It provides guidance on the optimization and design of the refractories for Al containing steel smelting. 相似文献
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通过采用X射线衍射、微型烧结等方法对巴西的一种低铝粉矿进行试验研究。该低铝粉矿品位较高,SiO2含量中等,Al2O3和磷含量均较低;粒度组成细;含铁矿物主要为赤铁矿,脉石矿物主要是石英;气孔率较低。烧结杯试验和工业试验结果表明,通过少量提高生石灰粉使用比例等,在一定的使用比例范围内烧结矿产量和质量指标可以保持在较好的水平。 相似文献
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