Abstract: The invention is directed to the structure of a YIG-component. The component comprises a magnetic circuit for generating an homogeneous magnetic field in an air gap of the magnetic circuit and at least one ferrite crystal (81) arranged in the air gap. The magnetic resonance frequency of the ferrite crystal (81) may be controlled dependent on the strength of the homogeneous magnetic field. The magnetic circuit is enclosed in a cavity of a housing (53, 55) arranged for mechanically relieving the magnetic circuit from external influence. The housing (53, 55) may be formed from a material selected at will. The magnetic circuit is arranged in a specifically shaped seat for accurate positioning of the air gap in the housing (53, 55). A foundation formed in the housing (53, 55) is provided for supporting a YIG-unit (75) comprising the ferrite crystal (81) with correct positioning of the ferrite crystal in the air gap.

Abstract: In a continuous process for recovery of values contained in a solid carbonaceous material, the carbonaceous material is comminuted and then subjected to flash pyrolysis in the presence of a particulate heat source to form a pyrolysis product stream containing a carbon containing solid residue and volatilized hydrocarbons. After the carbon containing solid residue is separated from the pyrolysis product stream, values are obtained by condensing volatilized hydrocarbons. The particulate source of heat is formed by oxidizing carbon in the solid residue. Apparatus useful for practicing this process are disclosed.