METHOD FOR PRODUCING MINERAL MATERIAL USING GRINDING BALLS FROM ZIRCONIUM OXIDE CONTAINING CERIUM OXIDE, PRODUCED PRODUCTS AND USE THEREOF

摘要

1. A method of obtaining crushed mineral material, comprising the steps of:! a) providing at least one mineral material, optionally in the form of an aqueous suspension,! b) grinding of mineral material! c) optionally sieving and / or concentrating the ground mineral material obtained in step (b),! d) optionally drying the ground mineral material obtained in steps (b) or (c),! characterized in that said grinding step (b) is carried out in the presence of grinding balls of zirconium oxide containing cerium oxide having! a cerium oxide content of between 14 and 20 wt.% of the total weight of said ball, preferably between 15 and 18 wt.% of the total weight of said ball and most preferably about 16 wt.% of the total weight of said ball; and! the average grain size after sintering of grains forming the specified ball with an average diameter of less than 1 μm, is preferably less than 0.5 microns and most preferably less than 0.3 microns. ! 2. The method according to claim 1, characterized in that the balls have an initial diameter of 0.2-1.5 mm and preferably 0.4-1.0 mm ! 3. The method according to any one of claims 1 or 2, characterized in that stage (b) is carried out at a pH above 7, preferably above 10 and most preferably above 11.! 4. The method according to any one of claims 1 or 2, characterized in that stage (b) is carried out at a temperature above 60 ° C, preferably above 90 ° C and most preferably above 100 ° C. ! 5. The method according to any one of claims 1 or 2, characterized in that the concentration of the mineral material ground in step (b) as a suspension is such that the suspension contains 10-80% (by dry weight of the mineral material), preferably 50- 80% and most preferred�