Abstract: A method for purifying a silicon-based load to obtain extra-pure silicon, includes: a) directing a plasma jet from an initial non-transferred arc torch onto a solid wall of a volume having an outlet to generate a homogeneous plasma flow, b) continuously injecting a silicon-based load having particles and/or grains, or crushed, into the homogeneous plasma flow to obtain an assembly, c) continuously directing the assembly from the outlet towards a melting pot having heating elements and stirring the crushed load into a molten state, d) once the entire crushed load has been injected and a molten bath formed inside the melting pot, directing the plasma jet from at least a second non-transferred arc torch onto the surface of the bath, e) removing the slag on the surface of the bath, and possibly repeating steps d) and e) to volatilize some of the bath impurities brought to the surface due to stirring.