| 摘要 |
<p>PURPOSE:To accelerate the reaction rate and to attain the decrease of the utilities, the chemicals and the installation necessary in the production in case of decomposing the rare earth ore with sulfuric acid by performing the reaction while crushing the rare earth sulfates forming on the surface of the rare earth ore. CONSTITUTION:Light rare earth, intermediate rare earth, yttrium and heavy rare earth are recovered by decomposing and treating the rare earth ore with sulfuric acid. In this case, the balls made of metal or ceramic are introduced into a reactortogether with the rare earth ore and sulfuric acid and the reaction is performed while rotating the reactor itself and crushing the rare earth sulfate forming on the surface of the rare earth ore.</p> |
