本文研究了黄药体系中磁黄铁矿电极表面吸附的双黄药的稳定性。采用恒电位阶跃法确定了丁基黄药离子在磁黄铁矿表面的扩散系数D为2．25×10-6cm2／s；采用循环电位扫描法确定丁基双黄药还原为黄药离子的阴极反应为一不可逆电化学反应，结合恒电流阶跃法建立了双黄药在磁黄铁矿电极表面还原解吸的电化学还原动力学方程。 In this paper, the stability of the xanthogen adsorbed on the surface of pyrrhotic pyrrhotite in xanthate system was studied. The constant potential step method was used to determine the diffusion coefficient D of butyl xanthate on pyrrhotite surface was 2.25 × 10-6cm2 / s. The cyclic potential scan method was used to determine the reduction of butyl xanthate to xanthate ion The cathodic reaction was an irreversible electrochemical reaction. The electrochemical reduction kinetic equation of the lysis of lixiviant pyrrhotic pyrrhotic electrode was established by the constant current step method.