The ore beneficiation is composed of ore preparation operation before the election, sorting operation, dehydrated job after the election.
To elect the useful mineral from the ore, you must first have ore crushing, making the swimming mineral and gangue reach the monomer dissociation. Sometimes in order to reach the special requirements of subsequent operating material granularity, also need to join some crushing operations in the middle. The pre-election preparations typically have crushing and screening operations and grinding two stages. Crushing machine and vibrating screen mostly joint operate, grinding machine and classifier became the closed cycle. They are the mainly machinery and equipment, composed of the crushing workshop and grinding election.
The job of sorting is to make the monomer separate from the ore, adopt the appropriate means, let the useful minerals and gangue sort process. The most commonly used separation methods:
(1), planktonic processing method (referred to as flotation), flotation is based on the different wet ability of the mineral surfaces, add the appropriate agents, in the flotation machine carve beneficiation methods. Its application range is wide, and it can be used to deal with the vast majority of the ore.
(2), magnetic method. The magnetic separation is a sorting method, depending on the mineral magnetic separator. It is mainly used to process ferrous metal ores and rare metals ore.
(3), gravity separation (referred to as the re-election of the act), weight selection according to the specific gravity (or density) of different minerals in different speed and trajectory of the moving of the medium (water, air, or heavy medium), achieving the method of sorting.
Dehydrated operation models often have the following stages:
(1)，concentration. Concentration is under the gravity or centrifugal force; make the solid particles in the dressing products occur precipitation, thus the part of the water is off the job. Concentration usually is done in the concentrator.
(2)，filtration. The filtering is to make slurry through a permeable instead of transparent spacer layer of solid particles, to achieve the job of separation. Filtration is concentrated further dewatering operation, generally done in the filter.
(3), dry. Drying is the final stage of the dehydration process. But it is only used in the dehydration after the concentrate also needs to be dried. The drying operation is generally carried out in the dryer; there is also other drying means.
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