TREATMENT OF MINERAL MATERIAL Russian patent published in 2006 - IPC C02F11/14 C01F7/06 B09B3/00 

FIELD: polymers, chemical technology.

SUBSTANCE: invention relates to treatment of mineral material, in particular, waste in processes of aluminum oxide extraction by a method of Bayer firm involving treatment of red oxide of iron slime waste in order to improve their easy transporting. Material involving an aqueous liquid with dispersed solid particles is pumped as fluid medium followed by standing and hardening. Hardening is improved in simultaneous retention of material to pumping by combination of this material with polymeric particles in the process or before pumping the material. Polymeric particles involve water-soluble polymer with intrinsic viscosity value at least 3 dl/g wherein polymers particles are in form of an aqueous dispersion including: (a) liquid dispersion medium consisting of mainly saline solution that comprises at least 25 wt.-% of inorganic salt as measure for the total mass of dispersion medium, and (b) water-soluble non-ionogenic or anion-active polymer of vinyl poly-addition that is insoluble in saline solution wherein this polymer is prepared from ethylene-unsaturated monomers comprising acrylic acid or salts, optionally (meth)acrylamide and optionally at least one cross-linking monomer comprising at least two polymerizing ethylene-unsaturated groups and wherein inorganic salt represents metal of group II halide, or wherein particles of polymer are in form of solid powder that is added to the material directly. Treatment method provides effective pumping the material and its hardening as waste useful for stacking, essential decrease of liquid in the material.

EFFECT: improved method for treatment of materials.

11 cl, 3 tbl, 2 dwg, 4 ex