Calcination of Missouri flint, burley and diaspore clays in a rotary kiln

This thesis will concern itself primarily with the preparation, handling and calcination of Missouri fire clays that are subsequently used as grog for manufacture of fire brick. This grog , i.e., calcined flint, burley or diaspore clay is then mixed with ether clays having plastic qualities to form desired shapes of high temperature refractories, and burned as a final product in tunnel kilns and as required, in “beehive” or periodic kilns. The actual manufacture of fire brick will not be dealt with since it is, in itself, a highly specialized industry. We are immediately concerned with the proper preparation of calcined clay as required for firebrick manufacture --Introduction, page 1