Kilns are thermally insulated chambers, or ovens, in which controlled temperature regimes are produced. They're used to harden, burn or dry materials. Specific uses include: To dry green lumber so that the lumber can be used immediately Drying wood for use as firewood Heating wood to the point of pyrolysis to produce charcoal For annealing, fusing and deforming glass, or fusing metallic oxide paints to the surface of glass For cremation (at high temperature) Drying of tobacco leaves Firin… (More on Kiln)