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Recovery of RE from Baotou rare earth concentrate with chlorination roasting

机译:包头稀土精矿氯化焙烧回收稀土

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摘要

A process for recovery of RE from Baotou rare earth concentrate was developed by fixing the fluorine and chlorinating RE with ammonium chloride in the ore. The optimum conditions were determined as follows: fixing the fluorine of the ore 80 min with the MgO dosage m (ore)/m (MgO) = 3:1 at 600℃; chlorinating the fixed fluorine calcine 80 min, with NH_4Cl dosage m (NH_4Cl)/m (ore) = 2:1 at 500℃. The RE recovery reaches 85% under optimum conditions. The products of fixing fluorine with MgO were determined by X-ray diffraction, and the mechanism of fixing fluorine was also discussed.
机译:通过固定氟并在矿石中用氯化铵对稀土进行氯化,开发了一种从包头稀土精矿中回收稀土的方法。最佳条件的确定如下:在600℃下以MgO剂量m(ore)/ m(MgO)= 3:1固定矿石中的氟80分钟;在500℃下以NH_4Cl剂量m(NH_4Cl)/ m(ore)= 2:1氯化固定的氟煅烧80分钟。在最佳条件下,RE回收率达到85%。通过X射线衍射确定了MgO固定氟的产物,并讨论了固定氟的机理。

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