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mining separator for gold iron chrome

mining separator for gold iron chrome

How Does Gravity Concentration Equipment Work? Multotec Canada

Spiral separators separate/concentrate particles either by density or by shape. Gravity concentration relies on the behaviour and reaction of different particle densities and sizes to gravity and centrifugal force. As a stream runs through the gravity concentration spiral, 2 or 3 mineral grades can be accumulated. This means more accurate and efficient downstream processing from your gravity concentration system. Spiral separators use centrifugal force to segment mineral streams as they are fed down the spiral trough. In wet spiral separators, the particles within a slurry will begin to cluster according to their density. Lower density particles are forced towards the outer edge of the path, while higher density particles remain in the centre. Dry spiral separators sort by shape. Rounder particles travel faster and are forced towards the outer edge of the spiral, where they are collected separately.

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Gravity concentration is mostly used for coal, gold, iron ore, platinum, chrome and mineral sand beneficiation. Coal Gravity concentration is used for processing coal fines downstream of a cyclone, following desliming and sizing. After gravity concentration, coal streams are fed into dewatering screens, then into a Siebtechnik centrifuge. Siebtechnik centrifuges include filtration, sedimentation and hybrid centrifuge types. They cover the widest range of solid liquid separation applications in many industries, including mining, chemical, pharmaceutical and food and beverage processing. Gold Gravity concentration spirals are optional in gold processing, used for carbon degritting. Iron ore Gravity concentration is used in iron ore processing. Following a range of screening processes, large assemblies of spiral concentrators are located downstream of a cyclone cluster and are used in classifying iron ore fines from waste. Platinum beneficiation Multotec gravity concentration solutions...

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To reduce downtime, spirals must be kept clean and free of buildup at all times. It is a good idea to clean the spirals with a water hose daily. Regular inspection for plugging and proper water dissolution are also good to perform on a daily basis. Spirals are maintenance free and can be left alone, since they have no moving parts. However, regular walk around inspections will ensure a proper and efficient operation.

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Spirals are selected according to the mineral type and ore characteristics. Design variations include spiral width, pitch angle, number of turns, repulping device used, and whether wash water is added to dilute and help the separation process. Your Multotec specialist will help you make the right selection for your application.

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