Method and installation for manufacturing a starting material for producing rare earth magnets

A method for producing a powdered starting material provided for production of rare earth magnets, comprising the following steps:

• pulverizing an alloy that includes at least one rare earth metal to form a powdered intermediate product, said powdered intermediate product includes said at least one rare earth metal;
• carrying out a classification using at least one static classifier to separate a portion of the powdered intermediate product;
• carrying out at least one classification directed at particle size and/or particle density using at least one dynamic classifier to separate a fraction from the portion of the powdered intermediate product;
• dispersing the fraction using the at least one dynamic classifier to establishing a homogenous distribution of particles in the fraction;
• and
• carrying out a renewed classification using the at least one dynamic classifier to separate a further fraction from the dispersed fraction;
• wherein the further fraction forms the starting material for manufacturing rare earth magnets,
• wherein the at least one dynamic classifier comprises a classifying rotor, and the at least one static classifier comprises a cyclone classifier,
• wherein said at least one classification comprises at least two classifications that follow one another in time, each directed at particle size and/or particle density, wherein
• as part of a first classification of the at least one dynamic classifier, directed at particle size and/or particle density, coarse material is separated from the portion of the powdered intermediate product, and wherein
• as part of a second classification of the at least one dynamic classifier, directed at particle size and/or density, fine material is separated from the portion of the powdered intermediate product.