Penetration Depth of Microwave into the Mixture of Goethite with Graphite Estimated by Permittivity and Conductivity

摘要: A study has been conducted to understand the penetration behavior of microwave into mixture goethite with carbon (C) aiming at providing an appropriate guidance dehydrate substances hydroxides occasionally contained in industrial sludge. At first, it was observed that could not sufficiently penetrate specimen C/goethite molar ratios greater than 2, giving incomplete dehydration. To microwave, permittivity and conductivity were measured. Permittivity measurements successfully made below 9 vol pct C. For content 8.56 C, abruptly increased by four orders magnitude because occurrence percolation. Above 13.7 C close inflection point approximating 10 became conductive. Transition from dielectric conductive occurred between The Generalized Effective Medium approximation satisfactorily express variation values whole range depth determined above two measurements. It found decreased increasing specimen. Finally, be provided as for blend ratio treated material along size a briquette or pellet referring obtained relation Furthermore, proved numerical simulation quite helpful predict how behaves under given conditions.