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Chrome Steel from Chromium Ore processing Residue

机译:铬矿石加工残渣中的铬钢

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In Hudson County, New Jersey, there are more than two million tons ofleftover chromite ore processing residues (COPR). Part of COPR was used asconstruction fill materials spreading the problem to a larger area. High solubility ofsome chromate compounds along with their toxicity is threatening the environment aswell as the human health. The primary objective of this manuscript is to demonstratean efficient and optimum way to recover chromium and iron from COPR in theproduction of chrome steel or stainless steel. In this research, COPR was thermallytreated to recover iron together with chromium. The research applied techniques usedin steel manufacturing to extract metallic iron and chromium from COPR. Anextensive experimental program was performed using a Thermo-GravimetricAnalyzer (TGA) to thermally treat chromium contaminated soils with additives atdifferent temperatures and under different reducing environments. The optimumchemical composition of soil and additives to be used in the melts was evaluatedbased upon the thermodynamic properties of the mixture to ensure good phaseseparation, least amounts of iron and chromium oxides in the slag and minimumvariability of final product (steel or iron with chromium). The impact of other oxideson the steel making process was evaluated to minimize the adverse impact on theprocess. The research demonstrated the feasibility of the proposed process.
机译:在新泽西州哈德逊县,有超过200万吨的 剩余的铬铁矿矿石加工残渣(COPR)。 COPR的一部分用作 建筑填充材料将问题扩展到更大的范围。高溶解度 一些铬酸盐化合物及其毒性正在威胁环境,因为 以及人类健康。该手稿的主要目的是证明 一种从COPR中回收铬和铁的有效,最佳方法 生产铬钢或不锈钢。在这项研究中,COPR是热的 处理后可与铬一起回收铁。研究应用的技术 在钢铁制造中从COPR中提取金属铁和铬。一个 使用热重分析仪进行了广泛的实验程序 分析仪(TGA)用于在室温下用添加剂对铬污染的土壤进行热处理 不同的温度和不同的还原环境。最佳 评价了土壤和熔体中使用的添加剂的化学成分 基于混合物的热力学性质以确保良好的相 分离,炉渣中铁和铬氧化物的量最少,最少 最终产品(钢或铁与铬)的可变性。其他氧化物的影响 对炼钢工艺的影响进行了评估,以最大程度地减少对铸钢件的不利影响。 过程。该研究证明了所提出的方法的可行性。

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