Abstract: A method and an arrangement for analysis of a material flow (S) is disclosed having one or more material components. The material flow (S) is conducted via a conveyor line. One or more acoustic sensors are allocated to the conveyor line. Acoustic signals produced by the material flow (S) are detected by the acoustic sensors and then converted into digital signals. The digital signals are analyzed in an evaluating unit in a computer-assisted manner and analyzed by means of an algorithm in comparison to reference values specified based on individual identifying characteristics of the material components, such that the material components are identified and the mass fraction of at least one material component in the material flow (S) is determined.

Abstract: The invention relates to a method and devices for separating primary ore into dead rock and at least one type of rock which contains at least one valuable mineral, the at least one valuable mineral comprising at least one rare-earth mineral. A sensor-controlled pre-framing method, which is based on the identification and classification of individual rock particles, is used.