NOVELTY - The reactor comprises a quartz crucible comprising a discharge port to discharge silicon material to a lower part of the crucible, a silicon melting part included in the crucible and encircled around exterior of the crucible, an oxidation source input portion for removing impurities included in the silicon material and for injecting reactive source into the silicon material for increasing vapor pressure inside the crucible, and a heating portion adapted for heating the quartz crucible and placed outside of the crucible. The crucible comprises multiple slits.    USE - The reactor is useful for melting silicon that is used as a wafer for semi-conductor purpose and a solar cell.    ADVANTAGE - The reactor can improve purity of silicone molten metal without performing volatilization refining process.    DETAILED DESCRIPTION - The reactor comprises a quartz crucible comprising a discharge port to discharge silicon material to a lower part of the crucible, a silicon melting part included in the crucible and encircled around exterior of the crucible, an oxidation source input portion for removing impurities included in the silicon material and for injecting reactive source into the silicon material for increasing vapor pressure inside the crucible, and a heating portion adapted for heating the quartz crucible and placed outside of the crucible. The crucible comprises multiple slits in which a part of the sidewall is cut. The heating portion heats the crucible by electric current caused by electromagnetic force in an inner portion of the melting part. The slits are arranged at intervals in the oxidation source input portion along the circumferential direction. Sidewall of the slits extended to a part of bottom surface of the crucible. The discharge port selectively opens and closes the input portion of the melting part. The bottom surface of the crucible is inclined with respect to direction of the discharge port. A cover potion is mounted in the upper part of the crucible to cover through-holes formed to prevent the inflow of impurities, where diameter of the cover is larger than the inner diameter of the crucible. An inlet port is equipped in top of the crucible and in which the silicon material is arranged.