首页>
外国专利>
AN IMPROVED PROCESS FOR THE RECOVERY OF PHOSPHATE (P2O5) FROM LOW GRADE ROCK PHOSPHATE ORE
AN IMPROVED PROCESS FOR THE RECOVERY OF PHOSPHATE (P2O5) FROM LOW GRADE ROCK PHOSPHATE ORE
展开▼
机译：从低品位磷矿石中回收磷（P2O5）的改进方法
展开▼
页面导航
摘要
著录项
相似文献
摘要
An improved process for the recovery of phosphate (P2O5) from low grade rock phosphate ore which comprises a) grinding the low grade phosphate ore to obtain a product size of all passing 100 microns by using a hydro cyclone, b) subjecting the said ground and classified product to flotation process at an acidic pH ranging from 4.0 to 5.5, c) adjusting the pH with a combination of sulphuric acid and phosphoric acid at higher solids concentration of above 50% solids followed by conditioning with a depressant, d) diluting the above said slurry at above 50% solids concentration to below 25% solids by adding the requisite amount of water followed by addition of a collector such as sodium oleate, e) conditioning the slurry for almost 10 minutes and immediately subjecting it to flotation after adding a frothier for not more than 18 min to obtain 35% P2O5, f) subjecting the above said flotation concentrate to flotation of dolomite by readjusting the slurry pH to about 4.5 followed by conditioning with a depressant such as herein described, g) treating the said conditioned dolomite concentrate with less than 0.3 kg/tonne sodium oleate and subjecting it to flotation of dolomite within 10 minutes to obtain a dolomite concentrate containing ~ 19% MgO with less than 0.3% P2O5 after one or more cleanings under the same conditions.
展开▼
