Sepg. non-miscible particles from melts - by applying an electromagnetic field to isolate the particles

摘要

Removal of small solid or liq. particles from liqs. is described. The largest part of the liq. or all of it is subjected to an electromagnetic field with a frequency such that induced patterns can be developed in the liq. for a time sufficient to allow the particles or inclusions to be concnd. in a particular region of the liq. Non-conducting particles e.g. sulphides, oxides and parts of refractory linings and weakly conducting particles e.g. borides, nitrides and carbides can be removed from metallic melts. Conversely metal droplets can be removed from slags. Efficient sepn. of various types of particles co-existing in the liq. is achieved. The process is partic. useful in the purification of melts for subsequent casting; improving soundness.