Silicon heating furnace

A silicon heating furnace having a heating chamber for containing raw material silicon to be heated, comprising:

• two semi-cylindrical furnaces constructing the cylindrical silicon heating furnace by combining each other;
• each of the semi-cylindrical furnaces having:
• a semi-cylindrical housing;
• a semi-cylindrical insulator arranged in inner side of the housing;
• a heater arranged in inner side of the insulator;
• a semi-cylindrical isothermal material made of heat-resistant glass, and arranged in inner side of the heater and heated by the heater, and constituting an inner wall of the heating chamber;
• radial direction separation preventing members arranged in inner side of both ends of circumferential direction of the housing, and preventing a separation of the insulator to radial direction by contacting at end faces of circumferential direction of the insulator;
• end face of circumferential direction covers fixed on the radial direction separation preventing members, and covering the end faces of circumferential direction of the insulator;
• and
• cooling pipes for end faces of circumferential direction through which cooling water passed arranged between the end faces of circumferential direction of the insulator and the end face of circumferential direction covers.