Development of Technology for the Production of Natural Red Iron Oxide Pigments

Abstract

The most common inorganic pigment is red iron oxide. World production of iron oxide pigments is about 600 thousand tons per year and greatly exceeds the production of other color pigments, with the highest demand is for red iron oxide pigments, slightly below demand for the yellow iron oxide pigments. Production of red iron pigment from iron ores is promising and will meet the demand for high quality and inexpensive pigment. The raw material for the production of a pigment is a paint grade ore. The main task of obtaining the pigment is removed from raw materials coarse mafic minerals. Designed wasteless flowsheet for separation of iron ore in two qualities – paint grade quality (pigment) and metallurgical grade. The technology includes accumulation paint grade ore, crushing, screening, then fine grinding in a ball mill, magnetic separation and multi-stage classification in hydrocyclones. After this, the cyclone overflow is thickened, filtered on a press filter, dried and sent to storage bin for subsequent shipment to the customer. The resulting pigment is suitable for use in the paint industry.