公开(公告)号：US4697744A

公开(公告)日：1987-10-06

申请号：US785615

申请日：1985-10-09

申请人： Minoru Wada ,  Chikara Hidaka ,  Takeshi Noma

发明人： Minoru Wada ,  Chikara Hidaka ,  Takeshi Noma

IPC分类号： C01G49/02 ,  B02C19/12

CPC分类号： C01G49/02 ,  C01P2004/51 ,  C01P2004/61 ,  C01P2004/62 ,  C01P2006/10 ,  C01P2006/80

摘要： A process for producing iron oxide fine powder of high purity from an oxide iron ore such as hematite or magnetite by only physical processing is disclosed, which comprises the steps of: providing a preliminarily ground raw material powder of an oxide iron ore or a mixture thereof having the impurity content in a specific range; classifying the raw material iron ore powder under such conditions that fine particles smaller than 10 .mu.m in diameter are removed from the ore powder; optionally treating the classified powder with an acid solution; refining the classified, optionally acid-treated iron ore powder by means of gravity concentration; and finish grinding the refined powder to reduce the particle size to a desired level.

摘要翻译： 公开了一种通过物理加工从氧化铁矿石如赤铁矿或磁铁矿生产高纯度氧化铁细粉的方法，其包括以下步骤：提供氧化铁矿石或其混合物的预先研磨的原料粉末 杂质含量在特定范围内; 在矿粉中除去直径小于10微米的细小颗粒的原料铁矿石粉末分级; 任选地用酸溶液处理分级粉末; 通过重力浓缩精炼分级，任选酸处理的铁矿石粉末; 并精细研磨精制粉末以将粒径降低到所需的水平。