| 摘要 |
Process for treating water-containing ore beneficiation residues with superabsorbents in order to increase the complex shear modulus G* by at least 10% compared to the untreated ore beneficiation residue,;where the complex modulus G* is determined by the method defined herein,;and the superabsorbent contains, in copolymerized form,;a) at least 50 mol % based on the superabsorbent of one or more monoethylenically unsaturated monomers containing acid groups, where the degree of neutralization of the monoethylenically unsaturated monomers containing acid groups is preferably from 15 to 85 mol %, and;b) preferably from 0.015 to 0.1 mol % based on the total amount of monomers of at least one crosslinker and;c) optionally one or more ethylenically and/or allylically unsaturated monomers which are different from the monomers a) and can be copolymerized therewith,;where the superabsorbent is optionally surface-treated, preferably using anticaking agents and/or plasticizers, and also is preferably surface-crosslinked. |
| 主权项 |
1. Process for treating water-containing ore beneficiation residues with superabsorbents in order to increase the complex shear modulus G* at a shear stress of 1 Pa by at least 10%, preferably at least 30%, in particular at least 50%, compared to the untreated ore beneficiation residue,
wherein the value of the complex shear modulus G* of the untreated ore beneficiation residue at a shear stress loading of 1 Pa is preferably at least 500 Pa, more preferably at least 750 Pa, in particular at least 1000 Pa, where the complex modulus G* is determined by the method defined herein, and the superabsorbent contains, in copolymerized form, a) at least 50 mol % based on the superabsorbent of one or more monoethylenically unsaturated monomers containing acid groups, where the degree of neutralization of the monoethylenically unsaturated monomers containing acid groups is preferably from 15 to 85 mol %, and b) preferably from 0.015 to 0.1 mol % based on the total amount of monomers of at least one crosslinker and c) optionally one or more ethylenically and/or allylically unsaturated monomers which are different from the monomers a) and can be copolymerized therewith, where the superabsorbent is optionally surface-treated, preferably using anticaking agents and/or plasticizers, and also is preferably surface-crosslinked. |
