  We investigate pure spin pumping in graphene by imposing a ferromagnet (F)
with rotating magnetization on top of it. Using the generalized scattering
approach for adiabatic spin pumping, we obtain the spin current pumped through
magnetic graphene to a neighboring normal (N) region. The spin current can be
easily controlled by gate voltages and under certain conditions, becomes
sufficiently large to be measurable in current experimental setups. In fact it
reaches a maximum value when one of the spins are completely filtered due to
the vanishing density of states of the corresponding spin species in the
ferromagnetic part. Considering an N|F|N structure with a finite ferromagnetic
region, it is found that in contrast to the metallic ferromagnetic materials
the transverse spin coherence length can be comparable to the length of F
denoted by $L$. Subsequently, due to the quantum interferences, the spin
current becomes oscillatory function of $JL/\hbar v_F$ in which $J$ is the spin
splitting inside F. Finally we show, originated from the controllability of
pumped spin into two different normal sides, a profound spin battery effect can
be seen in the hybrid N|F|N device.
