NOVELTY - High purity silicon is manufactured using refiner which has hollow rotational cooling body and supply unit which supplies cooling fluid into cooling body. High purity silicon is crystallized by solidification at the outer circumferential surface of cooling body provided in melting silicon. Temperature of melting silicon at the wall surface of melting pot is set to 1414-1600 degreesC.    USE - For solar batteries.    ADVANTAGE - Solidification of silicon below 1414 degreesC is prevented, and the melting temperature is maintained below 1600 degreesC. Electric power consumed for manufacturing high purity silicon is reduced. The scattering of melting silicon out of melting pot is prevented. Large amounts of high purity silicon with very low amount of impurities is produced easily and inexpensively. The purified silicon lump is easily removed from the crystallization part of cooling body. The floating of impurities on the molten metal surface is prevented.    DETAILED DESCRIPTION - High purity silicon is manufactured using refiner (1) which has melting silicon (S) in melting pot (2), heaters (5) for heating melting pot and rotation cooling system having hollow rotational cooling body (4) fixed to perpendicular hollow rotation axis (3). Lower end and inner space of rotation axis, and inner space of cooling body are connected. The hollow rotation cooling body is immersed into the melting silicon. The cooling body is rotated by rotation axis and cooling fluid is supplied into the cooling body through cooling fluid supply unit. The high purity silicon is crystallized by solidification at the outer circumferential surface of cooling body provided in the melting silicon. Temperature of melting silicon at the wall surface of melting pot is set to 1414-1600 degreesC.    DESCRIPTION OF DRAWING(S) - The figure shows front elevation which notched the entire structure of refiner used for purification of high purity silicon.    Refiner (1)    Melting pot (2)    Hollow rotation axis (3)    Hollow rotational cooling body (4)    Heater (5)    Melting silicon (S)