| 摘要 |
<p>This invention relates to a method for extraction of elements from carbonate-containing minerals with limited use of mineral acid and small discharges of CO2. The method comprises crushing the mineral to particles, submerging the crushed mineral in water, injecting CO2 into the water until the alkaline and alkaline earth carbonates are dissolved, separating the remaining solid particles from the liquid phase, discharge the liquid phase, and submerging the remaining solid particles in water and add a mineral acid until the particles are dissolved, separation and precipitation of the ionic rare earth elements as oxides by use of conventional hydrometallurgical methods.</p> |
