主权项 |
1. A raku kiln having at least one burner emitting sufficient heat into a primary tubular firing chamber for firing pottery; comprising:
a primary firing chamber with a thermally insulated sidewall and a closed top, the firing chamber having a bottom opposite the top, and at least one vent in the primary firing chamber top, a sub-chamber located below the firing chamber during use, the sub-chamber having a refractory bottom and having a sidewall that provides more insulation to heat transfer through the sub-chamber sidewall than the chamber walls, the sub-chamber having an upper end substantially blocked by a kiln shelf, the burners being directed toward the kiln shelf, the firing chamber having a bottom engaging the sub-chamber sidewall. |