Microwave Radiation Absorption at a Frequency of 2.45 GHz by a Composite Based on the Dust of Electrical Arc Steel-Making Furnaces.

The physicochemical transformations and electromagnetic properties of a composite based on the dust of electrical arc steel-making furnaces and a carbon-containing material (hydrolysis lignin) have been studied. The complex dielectric permittivity of the studied material was measured by the resonator method during heating to 800°C. At room temperature, the effective values of the magnetic permeability and loss of the composite mixture were calculated by solving the Bruggeman equation according to the effective medium theory. The magnetic permeability during heating was found by orthogonal regression. The numerical model of heating a dense packing from several layers of studied material grains was constructed by the finite element method with consideration of the real properties and physicochemical transformations. [ABSTRACT FROM AUTHOR]