Determining the fineness of a ground material, in particular an ore, in a mill

Methods and arrangements for determining the fineness of a ground material in a mill are provided, wherein the acoustic spectrum of the mill during the grinding process is used for concluding the fineness. The mill comprises a drum in which the ground material is present during the grinding process,...

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Bibliographische Detailangaben
Hauptverfasser:	MOCK RANDOLF, HUBER CHRISTOPH, LUGERT GÜNTER
Format:	Patent
Sprache:	eng
Schlagworte:	CALCULATING COMPUTING COUNTING CRUSHING, PULVERISING, OR DISINTEGRATING CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL ELECTRIC DIGITAL DATA PROCESSING INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES MEASURING MILLING GRAIN PERFORMING OPERATIONS PHYSICS PREPARATORY TREATMENT OF GRAIN FOR MILLING TESTING TRANSPORTING
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Beschreibung
Zusammenfassung:	Methods and arrangements for determining the fineness of a ground material in a mill are provided, wherein the acoustic spectrum of the mill during the grinding process is used for concluding the fineness. The mill comprises a drum in which the ground material is present during the grinding process, said drum being driven by a magnetic drive having at least one magnetic segment during the grinding process, so that a rotating magnetic field generated with the aid of the magnetic drive causes the drum to rotate. In order to determine the acoustic spectrum, a voltage induced in a coil of the magnetic segment is determined at least intermittently. On the basis of a model, using the detected time-dependent induced voltage, conclusions can be drawn about the acoustic spectrum and therefrom about the fineness.