高性能化铁炉浇注料的研制与应用

以特级高铝矾土熟料和镁砂为原料研制的化铁炉浇注料 ,经实际试用 ,证明其施工性能好 ,烘烤时不开裂 ,并且高温强度高 ,抗渣铁侵蚀性好 ,一次性使用寿命可达 3个月以上     

RH插入管的技术改进

介绍了RH插入管的使用条件、损毁机理,并从浇注料、镁烙砖、金属壳体等几方面入手,对现用插入管进行了技术改进。改造后的产品在大钢二炼钢RH炉上使用,最高寿命达到了108次,基本上满足了生产需要。     

莫来石结合刚玉-碳化硅质浇注料的组成与性能

研究了莫来石结合刚玉-碳化硅质浇注料的组成和性能的关系。借助SEM分析了浇注料的显微结构。掺入适当比例的氧化铝微粉和氧化硅微粉,有利于系统中二次莫来石的反应生成,可以改善浇注料的性能。     

矾土基高铝—尖晶石质钢包浇注料的研制和应用

以特级铝矾土、矾土基尖品石和烧结镁砂等为主要原料，采用超细粉凝聚结合，并对基质的化学矿物组成进行优化，开发出了矾土基高铝—尖晶石钢包浇注料。其烘烤特性良好，施工性能、物理性能及抗渣性比传统水玻璃结合的铝镁浇注料有显著提高。经在全国十多家钢厂的中小型钢包上使用，在绝大多数情况下其寿命比传统水玻璃结合的铝镁浇注料或铝镁炭发砖提高了１００％以上。     

新型注装含铝混合炸药研究

介绍一种以奥克托今为主体的注装含铝混合炸药。在解决能量与钝感问题上采用了高效复合钝感剂系统；有针对性地研制成功了“双真空振动控制冷却”装药技术，使炸药装药达到了高密度和高质量。     

AlON加入量对MgO-Al2O3浇注料性能的影响

研究了还原气氛下在MgO -Al2 O3 浇注料中加入AlON对其性能的影响。结果表明 :(1)在 16 0 0℃热处理后 ,随着AlON加入量的增加 ,浇注体强度变化不大 ,体积密度略有下降 ;(2 )在16 0 0℃进行抗渣试验 ,材料的抗侵蚀性和抗渗透性都随着AlON加入量的增加而有明显的提高 ,这可能是由于形成的MgAlON固溶体对熔渣润湿性较差 ,有利于阻碍熔渣的侵蚀和渗透。     

Monoaluminum phosphate-bonded refractory castables for petrochemical application

Phosphate-bonded refractories may be applied as repairing materials due to their short setting time and good thermo-mechanical properties in the 30–1000 °C temperature range. This works addresses the development of vibratable high-alumina castables containing commercial monoaluminum phosphate (MAP) solutions (Fosbind 151 and Fosbind 50) and dead-burnt magnesia (d<212 µm, setting agent) as the binder systems. Flowability, setting time, X-ray diffraction, cold erosion, thermal shock resistance, cold and hot modulus of rupture, thermogravimetric measurements and hot elastic modulus tests were carried out in order to understand the phase evolution and thermo-mechanical behavior of the refractories. Furthermore, the effect of adding a boron source (sintering additive) to the phosphate-bonded compositions was also investigated. According to the attained results, the reaction of MAP with MgO and the reactive aluminas of the compositions resulted in setting times of the mixtures around 90–120 min at 30 °C, which was associated with the in situ generation of magnesium and aluminum phosphates [MgHPO₄·3H₂O, Mg(H₂PO₄)₂(H₂O)₂ and AlPO₄.2H₂O]. The boron-containing castables presented Al₁₈B₄O₃₃ around 650–800 °C and this phase favored the increase of the samples' stiffness, mechanical strength, erosion and thermal shock resistance. The refractoriness under load measurements indicated that the maximum working temperature for the evaluated refractories was in the range of 1400–1500 °C.     

耐火浇注料对流与微波干燥的实验研究

进行了耐火浇注料热重分析,热风和微波干燥实验研究,得到了浇注料热风和微波干燥特性曲线。实验结果表明,与热风干燥比较,微波加热极大地降低了耐火浇注料干燥时间、提高了干燥效率和能源效率高,在耐火浇注料干燥过程中有着广阔的应用前景。     

Microstructural and mechanical investigation of high alumina refractory castables containing nano-titania

In this study, mechanical and structural properties of two high alumina refractory castables, i.e. without nano-titania and with 0.4?wt% TiO₂, are investigated. Bulk density, apparent porosity, cold compressive strength, cold modulus of rupture, permanent linear changes, hot modulus of rupture and shock resistance tests were performed on the samples. The microstructure and phase analyses were conducted by field emission scanning electron microscope equipped with EDX analyzer and X-ray diffraction, respectively. Results showed that hibonite phase formation in refractory is dependent on the temperature which could be decreased by addition of nano-titania, leading to the improvement of refractory strength. On the other hand, the decrease of hot modulus of rupture and shock resistance was observed for the refractory castable containing nano-titania. Also, Ca₃Ti₈Al₁₂O₃₇ phase was produced after firing at 1000?°C in the presence of nano-titania. Probable mechanisms are proposed for phase and microstructural changes in high alumina refractory castable containing nano-titania.     

高炉出铁沟快速干燥浇注料的研究与应用

对高炉出铁沟用快速干燥浇注料的组成，性能及显微结构进行了研究，认为采用自洁净材料结合可以改善材料的高温结合性能与抗氧化性能，研制的新型浇注料成型烘烤3小时后即可投入使用，在武钢高炉使用，通铁量接近20万吨，效果显著。