Abstract In India, chromite is used for making magnesia chrome bricks due to its low modulus of elasticity. But the use of magnesia chrome bricks in the sintering zone of cement rotary kilns causes environmental pollution due to the formation of Cr+6 compounds. In order to meet the above challenges and to satisfy the operational demands due to use of alternative fuels, now-a-days, galaxite spinel is being used in place of chromite as a chrome free material. Galaxite is not available in nature and electro fusion is the main process by virtue of which it is industrially manufactured. However, the main drawback of electro-fusion process is both time and energy consumption. In such a backdrop, the present work has been carried out which describes the synthesis of galaxite by plasma fusion process and also the characterization of its refractory properties for application in cement rotary kilns. This alternative process is absolutely new, faster in approach and also economically viable. The developed magnesia galaxite brick shows higher performance rate and is also economically cost effective as compared to the conventional magnesia chrome and magnesia galaxite bricks, presently available in the market.

中文翻译：

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等离子熔合合成方解石及其在水泥回转窑耐火材料中的应用

摘要 在印度，铬铁矿因其弹性模量低而被用于制作镁铬砖。但在水泥回转窑的烧结区使用镁铬砖，由于形成Cr+6化合物，造成环境污染。为了应对上述挑战并满足由于使用替代燃料而产生的操作需求，如今，使用方铅矿尖晶石代替铬铁矿作为无铬材料。Galaxite 在自然界中是不可获得的，电融合是工业制造的主要过程。然而，电融合工艺的主要缺点是时间和能源消耗。在这样的背景下，目前已开展的工作描述了通过等离子熔合工艺合成方解石以及其在水泥回转窑中应用的耐火性能的表征。这种替代工艺绝对是新的，方法更快，而且经济上可行。与目前市场上可买到的常规镁铬砖和镁砂砖相比，所开发的镁砂砖具有更高的性能和经济成本效益。