Patent ID: 9365910
Filing Date: 2016-06-14
CPC Classification: C01B,C22B,C25C,Y02P

Claim Text:
1. A process for recovering hard material particles which are present in a residue quantity, which is in a free-flowing or pourable form, of a hard metal which has a metal matrix consisting of a steel, of nickel or of a nickel alloy, in which the hard material particles are embedded, comprising the following production steps: pouring the residue quantity into an acid bath which contains a strong acid having a pK adding an oxidant or an acid to the acid bath, wherein by adding the oxidant or the acid a redox potential of the acid bath is set which is within a desired range of 300-800 mV, dissolving the matrix of the residue quantity, and depositing the hard material particles contained in the acid bath after dissolving the matrix.