Process for modifying the surface of a Mineral material comprises Adding to an aqueous suspension of a cake or agent which is formed by mixing a phosphonic acid compound cationic Dry; mineral material; aqueous suspension; and use of this Agent.

摘要

The present invention refers to a process to modify at least part of the surface of at least one mineral material, and to the use, as an additive in an aqueous suspension of mineral materials having a pH between 5 and 10, of at least one agent, wherein the additive allows for the formation of a low volume, high solids content filter or centrifuge cake on dewatering the suspension.