clinkering

Firebox turbulence was created by steam jets and clinkering was inhibited by introducing exhaust steam under the grate.

The comparatively short length of the sixty-foot kiln not only limited the amount of material that could be fed into it, but the limitation in length of the combustion zone militated against a thorough clinkering of the material, this operation being one in which the elements of time and proper heat are prime considerations.