Determination of Permeability for Refractories: From Standard Test Methods to Improved Interpretation Technique of the Experimental Data
For this reason, the determination of permeability values needs to be accurate and inherent to the material, independently from the experimental conditions. The present paper introduces a methodology, used in the field of geology and transposed in this case to refractory samples, in order to obtain reliable intrinsic permeability values. In the first part, this approach is applied to a data set obtained with a permeameter in atmospheric mode as described in the standards. The corrected flow regime plot contributes to select the measurements performed in Darcy flow regime, to further yield the intrinsic permeability with a Klinkenberg plot. In the second part an improved equipment with backpressure mode enables to extend this approach to refractories with low permeability, when Darcy flow conditions cannot be reached in atmospheric mode. The values obtained from the corrected flow regime plot were compared with the ones yield by Klinkenberg plot to ensure the reliability of this method.