Re-election process introduction

Re-election is suitable for processing ore or other materials with a large density difference between useful minerals and gangue. It is an effective method for the treatment of coarse, medium and fine (substantially bound to be larger than 25 mm, 25"2 mm, 2 to 0.1 mm) ore. Efficiency in handling fine slime (less than 0.1 mm) Not high, the modern film-forming mineral processing equipment can effectively recover the grain size to 20-30 microns, and the centrifugal concentrator can reach 10 microns. The re-election method is to treat tungsten, tin , gold ore, especially the processing of gold, sand and tin. method in processing applications including metals (niobium, tantalum, titanium, zirconium, etc.) are also common placer. reselection is also used sorted weakly magnetic iron ore, manganese ore, chrome ore. in recent years, non-metallic mineral reselection processing industry has also been developed, primarily for the treatment of asbestos, diamond, kaolin, apatite, pyrite and other minerals. flotation plant in sorting copper, lead, zinc, antimony, mercury sulfide ore. The re-election method is also often used for pre-selection of ore. In the main selection process, the re-election process is often combined with other beneficiation processes to select concentrates or tailings in the coarse-grain state earlier. This will help reduce production costs and reduce Metal loss. When dealing with a certain type of ore When the method is available for selection, the re-election method is always a priority. Re-election is carried out in a certain fluid medium, usually medium, or air or heavy medium (heavy liquid or resuspension). The sorting equipment moves in a certain way. The mineral particles are loosened by the buoyancy and hydrodynamic forces of the medium, and then the density layer (sometimes by particle size) is reached. The mineral grain property affecting the layering process is its density, particle size and More important shape factors. According to the movement form of the medium and the purpose of the operation, there are several methods for re-election: (1) classification (2) heavy medium beneficiation (3) jigging beneficiation (4) shaker beneficiation ( 5) chute beneficiation (6) spiral beneficiation (7) centrifugal force beneficiation (8) wind beneficiation (9) washing ore grading and washing is a separation operation according to particle size, which is commonly used in the preparation of ore before the selection. Other processes are The substantive sorting operation is also the content to be described below in this article. The difficulty of ore re-election mainly depends on the density difference between minerals, which can be judged according to the re-election criterion E.

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