C
CHEMISTRY; METALLURGY
C
CHEMISTRY; METALLURGY
C22
METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
C22
METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
C22B
PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
C22B
PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
11/00
Obtaining noble metals
11/00
Obtaining noble metals
C22B11/02
by dry processes
C22B11/02
by dry processes
C22B11/021
Recovery of noble metals from waste materials
C22B11/021
Recovery of noble metals from waste materials
C22B11/023
from pyrometallurgical residues, e.g. from ashes, dross, flue dust, mud, skim, slag, sludge
C22B11/023
from pyrometallurgical residues, e.g. from ashes, dross, flue dust, mud, skim, slag, sludge