| 摘要 |
<p>An aqueous tar sand tailings slurry mixture containing coarse sand, fine particulate solids and bitumen is classified into an underflow of coarse wet sand and an overflow consisting of an aqueous suspension of fine solid particles and bitumen with the aid of a liquid pool on the top flight of a upwardly revolving inclined conveyor belt. The mixture is introduced into the pool on the top flight wherein the coarse sand settles to the surface of the top flight as the underflow and the remaining fine solid particles and bitumen stay suspended in or float on the water of the mixture and flow out of the pool as the overflow. The underflow is removed by the surface of the revolving belt out of and above the surface of the aqueous pool. The underflow falls by gravity from the top flight as it passes by the upper conveyor roller The overflow is collected for subsequent recovery of its bitumen content. The process is particularly suited for concentrating bitumen from mined tar sand tailings.</p> |
