  We devise a new method for the detection of double-lined binary stars in a
sample of the Radial Velocity Experiment (RAVE) survey spectra. The method is
both tested against extensive simulations based on synthetic spectra, and
compared to direct visual inspection of all RAVE spectra. It is based on the
properties and shape of the cross-correlation function, and is able to recover
~80% of all binaries with an orbital period of order 1 day. Systems with
periods up to 1 year are still within the detection reach. We have applied the
method to 25,850 spectra of the RAVE second data release and found 123
double-lined binary candidates, only eight of which are already marked as
binaries in the SIMBAD database. Among the candidates, there are seven that
show spectral features consistent with the RS CVn type (solar type with active
chromosphere) and seven that might be of W UMa type (over-contact binaries).
One star, HD 101167, seems to be a triple system composed of three nearly
identical G-type dwarfs. The tested classification method could also be
applicable to the data of the upcoming Gaia mission.
