| 摘要 |
592329 Disclosed herein is a process for beneficiating a mineral substrate by electrostatic separation, said mineral substrate comprising a conducting mineral component and/or a non-conducting mineral component. The process comprises forming a slurry of the mineral components and an electrostatic modification reagent, drying said slurry to form a substantially dry mixture, and applying an electric field to the mixture to effect separation, wherein the electrostatic modification reagent is chosen from an organic compound selected from the group consisting of quaternary amines, imidazoline compounds, dithiocarbamate compounds, pyridine compounds, pyrrolidine compounds, conducting polymers, polyethyleneimines, benzenesulfonic acid compounds and benzenesulfonate compounds. In one embodiment the electrostatic modification reagent further comprises a plurality of particles a plurality of particles having an average specific resistivity that is greater than or equal to the specific resistivity of the non-conducting mineral component when the non-conducting mineral component is electrostatically modified, and/or a plurality of particles having an average specific resistivity that is less than or equal to the specific resistivity of the conducting mineral component when the conducting mineral component is electrostatically modified. |
