Carbon fiber quartz heating tube monopoly of high quality thick-walled seamless steel pipe made, the U.S. imported high temperature magnesium oxide powder and sealing material, the heating tube temperature reached 900 ℃, the supply of carbon fiber quartz heating tube being dehydrated state monopoly in the dry will not damage; and using protective atmosphere furnace black belt by 1060 ℃ high temperature nitriding process, the supply of carbon fiber quartz electric heating tube monopoly control of temperature increase and decay resistance, to ensure life.