CAJ | 학술논문

为了减少甚至消除氨氮污染，提出采用硫酸镁作为浸取剂浸取离子吸附型稀土矿的方法。研究反应温度、矿物粒度和搅拌速度对浸取过程的影响以及单一稀土元素的浸出行为，以此获得稀土浸取机理；另外，还对比分析硫酸镁和硫酸铵两种浸取剂的浸取效果。研究结果表明：稀土的浸取过程可以采用内扩散控制模型描述，其表观活化能为9.48 kg/moL，而单一稀土元素与稀土总量的浸出行为一致。另外，当硫酸镁或硫酸铵浸取剂的浓度为0.2 mol/L时，稀土浸出率都能达95%以上，但是使用硫酸镁浸出剂能使铝的浸出率较硫酸铵的降低10%以上。
위료감소심지소제안담오염，제출채용류산미작위침취제침취리자흡부형희토광적방법。연구반응온도、광물립도화교반속도대침취과정적영향이급단일희토원소적침출행위，이차획득희토침취궤리；령외，환대비분석류산미화류산안량충침취제적침취효과。연구결과표명：희토적침취과정가이채용내확산공제모형묘술，기표관활화능위9.48 kg/moL，이단일희토원소여희토총량적침출행위일치。령외，당류산미혹류산안침취제적농도위0.2 mol/L시，희토침출솔도능체95%이상，단시사용류산미침출제능사려적침출솔교류산안적강저10%이상。
Magnesium sulfate was proposed to be leaching agent to deal with the ion-adsorption type rare earths ore to reduce or even eliminate ammonia?nitrogen emissions. The effects of temperature, particle size and stirring speed on rare earth leaching process and the leaching behaviors of the single rare earth element were investigated in order to reveal the rare earth leaching characteristics. Besides, the comparison of leaching effects between magnesium sulfate and ammonium sulfate was also studied. The results showed that the rare earth leaching process could be well described with inner diffusion control model and the apparent activation energy was 9.48 kJ/mol. The leaching behaviors of the single rare earth element were brought into correspondence with rare earths. Moreover, when the concentration of leaching agent was 0.20 mol/L, the rare earth leaching efficiency could all reach above 95% and the leaching efficiency of aluminum impurities could be restrained by 10% using magnesium sulfate compared with ammonium sulfate.