To obtain a system for melting a material thrown into a crucible by heating through a heating means in which molten liquid can be dropped while securing the melting system at a specified position by making a molten outlet at the lower part of the crucible and providing a movable cover member made of a water-cooled metal plate at the molten outlet.

A crucible 1 comprises an inner quartz crucible 1a and an outer graphite crucible 1b wherein a molten outlet 1c is made at the lower part of the quartz crucible 1a while being directed downward and supported by graphite. A heating means 2 is provided at the outer circumferential part of the crucible 1 and a cover member 4 made of a water-cooled metal plate is provided at the molten outlet 1c. The cover member 4 has double tube structure of inner and outer tubes 5, 6 provided with a metal plate at one end thereof. At the time of melting, the molten outlet 1c is coupled with the cover member 4 and cooled in order to block melting of silicon raw material at the molten outlet 1c and the vicinity thereof. Upon finishing the melting, the cover member 4 is moved obliquely downward and molten is delivered from the molten outlet 1c.