  We consider spin-dependent scatterers with large scattering cross-sections in
graphene -a Zeeman-like and an intrinsic spin-orbit coupling impurity- and show
that a gated ring around them can be engineered to produce an effcient control
of the spin dependent transport, like current spin polarization and spin Hall
angle. Our analysis is based on a spin-dependent partial-waves expansion of the
electronic wave-functions in the continuum approximation, described by the
Dirac equation.
