Mineral beneficiation by decompression scalping |
|||||||
| 申请号 | US39695273 | 申请日 | 1973-09-13 | 公开(公告)号 | US3881660A | 公开(公告)日 | 1975-05-06 |
| 申请人 | UNITED STATES STEEL CORP; | 发明人 | RIBAS ROGER S; | ||||
| 摘要 | Certain minerals, particularly weathered phosphate pebble, are treated to remove significant quantities of impurities by pressurizing a slurry thereof to about 25-100 psig, preferably 30-60 psig for weathered phosphate pebble, and passing the pressurized slurry through a nozzle to the atmosphere to provide sudden release of pressure. Weathered and other encrusted minerals treated in this manner are beneficiated by the dissolution and particularly by the erosion of impurities primarily encrusted on the mineral. The erosion and collapse of the crust is believed to be caused at least partly by the sudden flow of water held in the pores of the crust. | ||||||
| 权利要求 | 1. METHOD OF SEPARATING POROUS LATERITIC WEATHERED ORE PARTICLES INTO CURST AND CORE PORTIONS COMPRISING FORMING A LIQUID SLURRY THEREOF, SUBJECTING THE SLURRY TO A PRESSURE BETWEEN 25 AND 100 PSIG, AND RELEASING THE PRESSURE TO THE ATMOSPHERE THROUGH A NOZZLE. 2. Method of claim 1 followed by impingement of the slurry at a velocity of 60 to 90 ft./sec. on a hard surface. 3. Method of separating the weathered crust from the core of porous lateritic weathered ore particles comprising forming a liquid slurry thereof in water and subjecting the particles to decompression scalping at a pressure between 25 and 100 psig. 4. Method of claim 3 in which the pressure is between 30 and 60 psig. 5. Method of claim 3 followed by shattering of the ore. 6. Method of claim 3 in which the ore particles are phosphate ore particles. 7. Method of claim 1 in which the slurry is continuously formed, subjected to pressure, and passed through a nozzle. |
||||||
| 说明书全文 | |||||||
QQ群二维码
意见反馈
意见反馈