Process and equipment for collecting magnetite-containing ore dust samples and determining the magnetite and phosphorous contents thereof

US4482864A · kind A · utility

Assignee

• LUOSSAVAARA-KIIRUNAVAARA AB · SE

Inventors

• Rainer Koenig · Eschborn, DE
• Rolf A. Sieglen · Pocking, DE
• Wolfgang Weisser · Bad Homburg vor der Höhe, DE
• Helga Heide · Kelkheim, DE

Key dates

• Filing date: Jan 15, 1981
• Grant date: Nov 13, 1984
• Expiry date: Jan 15, 2001

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N2001/1018
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

Process for the determination of the magnetite and phosphorus contents of magnetite-containing ores. A sample of dust which has been produced artificially or obtained as byproduct is collected and placed in an electromagnetic field. The magnetite content of the dust sample is determined from changes in the magnetic flux or the relative permeability. Subsequently the phosphorus content of the total dust sample mass is determined. Also the total dust sample mass is likewise determined from changes in the magnetic flux or the relative permeability. The dust sample is preferably dried prior to measuring the change in the magnetic flux or the relative permeability. Equipment for carrying out the process includes a coil system having at least one measuring coil for determining the magnetite content. The core of the measuring coil forms a tube which has a minimum filling height that exceeds the length of the coil. An additional measuring coil, whose length exceeds the maximum filling height of the tube, is provided for determination of the sample mass. The tube is connected to a reaction chamber for carrying out the phosphorus analysis. The reaction chamber is connected to reagent storage…