PROCESSING OF INORGANIC PARTICULATE MATERIALS

摘要

The invention provides the use of near infra-red (NIR) spectroscopy as an analysis, control and/or monitoring aid in the industrial processing of inorganic particulate materials such as hydrous kaolin, calcined kaolin, chemically aggregated kaolin, feldspar, silica, magnesia, aluminium silicate, calcium carbonate, magnesium carbonate, etc. A physical or chemical property of interest (e.g. the amount of stearic acid or dispersant coated on the particles) is assessed using the NIR spectrum, by reference to data (e.g. calibration data obtained from an analagous material) relating the NIR spectrum of the inorganic particulate material to the physical or chemical property of interest.