Patent ID: 8286447

Claim:
A method for producing a quartz glass crucible, the method comprising melting a quartz powder molded product loaded on the inner side of a mold, through arc discharge from an arc electrode, while performing vacuum suction, wherein the melting of quartz powder is initiated from a rim edge of the quartz powder molded product, and after the quartz powder at the rim edge is melted, heating is performed from a wall section of the quartz powder molded product to a bight section and a bottom section of the quartz powder molded product in order, to thereby seal the entire surface of the inner side of the quartz powder molded product, wherein: at the time point of initiating melting of the rim edge of the quartz powder molded product, the lower end of the electrode is disposed at a position higher than the rim edge of the quartz powder molded product by 20 to 150% of a bore diameter of the quartz glass crucible to be produced, as the distance along the axial direction of the mold; the time period from the time point of initiating melting the rim edge to the time point of sealing of the entire surface of the inner side of the quartz powder molded product, is 0.01% or more and 10% or less of a total arc time, the total arc time being a time from the time point of initiating melting the rim edge to the time point of completing arc discharge, and the molten thickness of the quartz powder molded product from the time point of initiating melting the rim edge to the time point of sealing of the entire surface of the inner side of the quartz powder molded product, is 0.05 mm or more and 3 mm or less.