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1.发明授权公开(公告)号：US11311933B2
公开(公告)日：2022-04-26
申请号：US16413875
申请日：2019-05-16
发明人： Frank Winter , Wilhelm Fernengel
摘要： A method and a plant for the production of a powdery starting material, which is provided for the manufacture of rare earth magnets, are disclosed. First of all, at least one magnetic material, which is comminuted into a powdery intermediate product with a possibly increased concentration of impurities, and/or at least one alloy including rare earth metal are provided, which includes a low concentration of impurities. A classification of the powdery intermediate product to at least one criterion takes place subsequently, wherein, for the classification of the powdery intermediate product with the increased concentration of impurities, at least one dynamic classifier is provided, which divides the powdery intermediate product with impurities into at least two fractions based on the at least one criterion, wherein at least a high concentration of impurities accumulates in a first fraction and no impurities or at least a lower concentration of impurities than in the case of the first fraction accumulate in a second fraction, and wherein the fraction without impurities or with a low concentration of impurities forms the starting material for the manufacture of rare earth magnets.
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2.发明公开公开(公告)号：US20230271224A1
公开(公告)日：2023-08-31
申请号：US18300948
申请日：2023-04-14
发明人： Frank Winter , Hermann Sickel , Wilhelm Fernengel
IPC分类号： B07B13/00 , B22F3/12 , H01F1/057 , B22F3/24 , B22F9/04 , B07B13/04 , C22C28/00 , H01F1/053 , B22F1/052 , H01F41/02
CPC分类号： B07B13/003 , B07B13/04 , B22F1/052 , B22F3/12 , B22F3/24 , B22F9/04 , C22C28/00 , H01F1/0536 , H01F1/0577 , H01F41/0246 , H01F41/0253 , B22F2009/044 , C22C33/025
摘要： A method for producing a powdered starting material, which is provided for production of rare earth magnets, including the following steps: pulverizing an alloy, including at least one rare earth metal, wherein a powdered intermediate product is formed from the alloy including at least one rare earth metal, and carrying out at least one classification aimed at particle size and/or density for the powdered intermediate product, wherein a fraction of the powdered intermediate product, which is formed by means of the at least one classification, for fabrication of rare earth magnets. Furthermore, at least one dynamic classifier is provided, implementing at least one classification directed at particle size and/or density for the powdered intermediate product and thereby separates the fraction from the powdered intermediate product, which forms the starting material provided for manufacturing rare earth magnets.
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3.发明授权公开(公告)号：US11309127B2
公开(公告)日：2022-04-19
申请号：US16411932
申请日：2019-05-14
发明人： Frank Winter , Wilhelm Fernengel
摘要： A method and a plant for the production of a powdery material, which is provided for the manufacture of rare earth magnets. First of all, at least one magnetic or magnetizable raw material, respectively, is provided and is comminuted into a powdery intermediate product, which includes powder particles including corners and edges, by means of conventional comminuting methods. The sharp-edged powder particles are chamfered subsequently. The optimized powdery product including the chamfered powder particles is used for the manufacture of rare earth magnets.
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4.发明申请公开(公告)号：US20190027284A1
公开(公告)日：2019-01-24
申请号：US16035154
申请日：2018-07-13
发明人： Frank Winter , Hermann Sickel , Wilhelm Fernengel
摘要： A method for producing a powdered starting material, which is provided for production of rare earth magnets, including the following steps: pulverizing an alloy, including at least one rare earth metal, wherein a powdered intermediate product is formed from the alloy including at least one rare earth metal, and carrying out at least one classification aimed at particle size and/or density for the powdered intermediate product, wherein a fraction of the powdered intermediate product, which is formed by means of the at least one classification, for fabrication of rare earth magnets. Furthermore, at least one dynamic classifier is provided, implementing at least one classification directed at particle size and/or density for the powdered intermediate product and thereby separates the fraction from the powdered intermediate product, which forms the starting material provided for manufacturing rare earth magnets.
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