Abstract Dolomite is used as basic lining for rotary cement kiln due its high refractoriness, corrosion resistance against basic environments and high coating performance, but its poor hydration resistance limits its use. In this work, Egyptian dolomite was converted into outstanding refractory magnesia-calcium zirconate composite (M-CZ) by the addition of 37.8–47.8 wt% zirconia. The mixtures were milled, uni-axially formed and fired at a temperature of 1400–1550 °C for 2 h. Thermal analysis, phase composition, microstructure, densification parameters, and other technological properties of the fired specimens were investigated. It was found that sintered M-CZ composite with bulk density (3.95 g/cm 3 ), cold crushing strength (170 MPa), and high coating ability can be obtained by firing Egyptian dolomite with 37.8 wt% zirconia at temperature 1500 °C with the formation of belite as a secondary product. This composite can be nominated to be produced on a large industrial scale.

中文翻译：

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用埃及白云石作为水泥回转窑炉衬的熟料制备 MgO-CaZrO 3 耐火复合材料

摘要 白云石具有耐火度高、耐碱性环境腐蚀、涂层性能好等优点，被用作水泥回转窑的基础衬砌，但其抗水化性能较差，限制了其使用。在这项工作中，通过添加 37.8-47.8 wt% 的氧化锆，埃及白云石被转化为优异的耐火氧化镁-锆酸钙复合材料（M-CZ）。将混合物研磨、单轴成型并在 1400-1550°C 的温度下烧制 2 小时。研究了烧成试样的热分析、相组成、微观结构、致密化参数和其他技术性能。结果表明，用 37 烧制埃及白云石可以获得体积密度（3.95 g/cm 3 ）、冷压强度（170 MPa）和高包覆能力的烧结 M-CZ 复合材料。8 wt% 氧化锆在 1500 °C 的温度下形成贝利特作为副产物。这种复合材料可以指定用于大规模工业生产。