Critical Survey and Report on the Permeability of Refractory Materials to Gases

JSGT 1934 V18 T336-T390

 The problem of permeability is examined in a critical manner, the significance of permeability measurements discussed, and methods of determining it examined. The assumptions involved in the calculation of permeability are reviewed, and the necessity stressed of recording the volume of gas passing through the sample as the volume at the mean absolute pressure of the test. A definition of permeability which takes account of this fact is proposed. Data are quoted on the relation of permeability to refractory type, and to the method of manufacture.

The temperature–permeability relationships are discussed on the basis of a fundamental concept of permeability, and the influence on permeability of firing temperature, the amount and kind of grog in the refractory, and of the amount of bond present. Various avenues of research are indicated throughout the paper.

Eric Preston