公开(公告)号：US5819945A

公开(公告)日：1998-10-13

申请号：US521371

申请日：1995-08-31

Applicant: Janusz S. Laskowski ,  Ying Bin He

Inventor： Janusz S. Laskowski ,  Ying Bin He

IPC: B03B5/34 ,  B03B5/44 ,  B03B9/00

CPC classification number: B03B5/34 ,  B03B5/442

Abstract: The present invention provides a method for separation of fine particles in a bimodal (two component) dense medium. In accordance with the present invention, the dense medium comprises ferromagnetic particles that have a relative density range from about 4.0 to 7.0 suspended in water and are characterized by a bimodal size distribution. Such a medium exhibits high stability and favourable rheological properties. The use of such a bimodal magnetite dense medium in cleaning fine coal in a dense medium cyclone or dynamic dense medium separator results in optimum separation efficiency when the medium contains approximately 20-40% fine and 60-80% coarse magnetite, and when the size ratio of coarse-to-fine magnetite is in the range of 5 to 10.

Abstract translation: 本发明提供了一种分离双峰（双组分）致密介质中的细颗粒的方法。 根据本发明，致密介质包括铁磁颗粒，其具有悬浮在水中的约4.0至7.0的相对密度范围，并且其特征在于双峰尺寸分布。 这种介质表现出高稳定性和良好的流变性能。 当这种双峰磁铁矿致密介质在致密的介质旋风分离器或动态致密介质分离器中清洗细煤时，当介质含有约20-40％的细颗粒和60-80％的粗磁铁矿时，会产生最佳的分离效率，当尺寸 粗到细磁铁矿的比例在5〜10的范围内。