Abstract

The results of studying the reducing roasting of the high-iron (65% Fe₂O₃) niobium–rare earth ore of the Chuktukon deposit with the production of high-phosphorous cast iron and niobium–rare earth slag are discussed. The optimum reducing roasting conditions are found, and fairly complete separation of the roasting product into metal and slag phases is shown to be achieved at 1400°C. Under these conditions, 88% of phosphorus passes into cast iron, and 95% of niobium and 85% of manganese are concentrated in a rare-earth slag. The yield of phosphorous cast iron (up to 3.5% P) is about 45% and that of slag is 25% of the ore mass. The main slag phases are glass and, crystals with perovskite, loparite and spinel structures. Niobium and rare earth metals are concentrated in the first three phases, and the spinel phase is represented by an MnAl₂O₄–MgAl₂O₄ solid solution. After the preliminary removal of iron and phosphorus from the ore in the form of a metallic product, the material flows in the hydrometallurgical stage of processing are found to be reduced fourfold. Moreover, the entire process can become environmentally friendly with high technical and economic indicators.

中文翻译：

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通过生产磷铸铁和铌-REM渣减少楚克图孔矿床铌-REM矿石的焙烧

摘要

研究高铁（65％Fe ₂ O _3）的还原焙烧的结果）讨论了楚克图孔矿床中的铌-稀土矿以及高磷铸铁和铌-稀土矿渣的生产。找到了最佳的还原焙烧条件，并证明在1400°C下将焙烧产物完全完全分离成金属相和炉渣相。在这些条件下，88％的磷进入铸铁，95％的铌和85％的锰集中在稀土矿渣中。磷铸铁的产率（最高P为3.5％）约为矿石质量的25％。主要炉渣相为玻璃和具有钙钛矿，菱铁矿和尖晶石结构的晶体。铌和稀土金属集中在前三个相中，尖晶石相以MnAl ₂ O ₄ -MgAl表示₂ O ₄固溶体。在以金属产品形式从矿石中初步去除铁和磷后，发现在湿法冶金阶段的物料流减少了四倍。而且，整个过程可以通过高技术和经济指标来实现环境友好。