The Particle Separation in Mineral and Chemical – Essay Example

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The paper “ The Particle Separation in Mineral and Chemical”   is an apposite  version of an essay on science. Extractive metallurgy is divided into four divisions: Mineral Processing (or Beneficiation), Hydrometallurgy, Hydrometallurgy, and Electrometallurgy. In processing minerals, a number of unit operations are used to prepare and classify mineral ores before the valuable constituents of minerals can be separated for further treatment. Most rocks contain mineral deposits but when the concentrations minerals are too low to justify mining, it is usually considered a waste. Inside the metal ore, minerals are usually inside a gangue, and during mineral processing is to separate minerals from their ores (Choi 1982). The simplest method of separating mineral ores from gangue is picking out minerals crystals from rocks pebbles; this is always a very tedious process when the mineral particles are small in size.

Another simple technique of mineral separation is to rely on the different densities of minerals and collecting them at different places. Mineral particles which are heavier in weight will drop out of suspension quickly, while minerals which are lighter in weight will be carried further by a stream of water in the processing device.

In this modern age, techniques and machines have been employed to separate minerals from their ores. Mineral processing consists of two functions, firstly, it involves preparing and liberation of valuable minerals from waste materials and secondly, it involves the separation of these minerals particles into valuable products called concentrations. Mineral particles will be exposed from their gangue; this process of size reduction of gangue is what we called comminution. The crushing and grinding processes of gangue will produce a range of particles with varying degrees of liberation, any particle which does not exceed the target size for physical separation or chemical extraction will be returned into the crushing machine to be crushed until it has reached a required target.

Meanwhile, in the comminution or separation process, it begins during excavation or scrapers for softer material. Separation of mineral materials is carried out in sequential manners using crushers and screens followed by grinding mills and classifiers (Tarjá 1981). Reflux Classifier (RC)This is a new device that is being used by mining companies to separate mineral particles based on their mineral densities or minerals size.

Water flows through a distributor plate at the base of the reflux classifier and this will suspend mineral particle within the device. Inside the reflux classifier, there are a set of inclined plates which amplifies the segregation rates of mineral particles. These inclined plates inside the RC will permit slower settling mineral particles to pass through the zone of inclined plates, while those fast-moving mineral particles will return to the zone below. A sedimentation area inside the RC is increased by the inclined plates which are found inside the RC and this in return will permit higher throughputs. Particle SegregationParticle segregation is an important feature of non-uniform sheared granular flows, in which large particles rise to the top of the flow regime.

By changing the flow’ s spatial composition, segregation has significant consequences on the behavior of mixed particle systems. This process involves the separation of mineral particles into various characteristics such as size, density, shape, and other properties of particles of which they are composed (Tarjá 1981).

Reference

List

Choi, W. (1982). Comminution and liberation studies of complex sulfide ores. Virginia: Virginia Polytechnic Institute and State University.

McGlinchey, D. (2008). Bulk solids handling: equipment selection and operation. London: Blackwell Pub.

McKay, J.D. (1988), “Column Flotation and Bubble Generation Studies at the Bureau of Mines”, Column Flotation ‘88, SME-AIME, Littleton, Colorado pp. 173-186.

Metso (2006) Basics in Minerals Processing, Metso Minerals, Retrieved from http://www.metso.com.

Tarjá, G. (1981). Mineral Processing: Fundamentals, comminution, sizing, and classification. Michigan: the University of Michigan.

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