| 摘要 |
<p>A process of concentrating an aqueous suspension of solid particles, comprising the steps of, introducing the aqueous suspension of solid particles into a vessel, addition of at least one organic polymeric flocculant to the aqueous suspension of solid particles thereby forming flocculated solids, allowing the flocculated solids to settle to form a bed of solids in suspension at the lower end of the vessel, flowing the bed of solids from the vessel as an underflow, in which a portion of the bed of solids or underflow is transferred as a recycle stream to the vessel into or above the bed of solids, in which an active agent is added to the solids in the recycle stream and wherein the active agent is selected from the group consisting of free radical agents, oxidising agents and reducing agents.</p> |
