The new Micromeritics SediGraph ® III Plus determines particle size by using the highly accurate and reproducible sedimentation technique which measures the gravity-induced settling rates of different size particles in a liquid with known properties.
Sluices and spirals rely on the difference between viscous drag and buoyancy for particle separation. This difference is directly related to particle size. Gravity tables use a vibrating platform to separate by particle size and specific gravity. Thus, narrow size distribution feeds result in better separation.
The iron occur in Fe-mineral ores contains impurities of Phosphorus, sulphur and high alkali as well as impregnations of waste rock. To produce a metallurgy treatable concentrate the ore has to be grind for mineral liberation, enriched for concentration and dewatered for transportation.
The pelletization behavior of an iron ore as well as the properties of the pellets produced are affected by the various properties of the ore. The main effective ore properties are: its specific surface area, porosity, mineralogical composition, and particle size distribution of the fine material to ...
The size distribution is expressed in terms of mass and percentage mass, passed or retained on selected sieves. The purpose of this International Standard is to provide a basis for any testing of iron ore and direct reduced iron involving size determination for use by contracting parties in the sale and purchase of these materials.