Recovery of RE from Baotou rare earth concentrate with chlorination roasting
来源期刊：中国有色金属学报(英文版)2003年第2期
论文作者：朱国才 时文中 华杰 徐盛明 池汝安
文章页码：438 - 442
Key words：rare earth concentrate; fixing fluorine; chlorinating; rare earth
Abstract: 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 80min with the MgO dosage m(ore)/m(MgO)=3∶1 at 600℃; chlorinating the fixed fluorine calcine 80min, with NH4Cl dosagem(NH4Cl)/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.
