| 摘要 |
A process is disclosed for recovering metal values from aqueous tailings slurry obtained from a hot water extraction process in which bitumen is recovered from bituminous sand, the slurry containing solids comprising by weight from about 5 to about 9% titanium, from about 2 to about 5% zirconium, from about 8 to about 12% iron, from about 2 to about 5% residual bitumen and from about 50 to about 70% siliceous material, the pulp density of the tailings slurry being from about 8 to about 20% by weight solids. The process comprises ensuring that the pH of the tailings slurry is in the range of from about 8 to about 11.5, subjecting the slurry to a flotation step in a flotation vessel comprising injecting air to cause flotation of a substantial amount of said metal values in a froth above the siliceous and other unwanted material, and removing the floating froth containing the substantial amount of metal values from the remainder of the slurry. |
