This paper discusses the separation principle the structure and the working process of TBS analyzes the influencing factors of TBS effect of separation and illustrates with examples the application of TBS points selected in the slime finally proposed the TBS as the advantage of coarse slime separator
·Except some plants with high quality coal under normal circumstance slime of jig clean coal or magnetic separation tailings of clean coal has more ash content than total clean coal average 2% in worse case as high as 10%[2] which is called carrying ash phenomena Reconstruction of these preparation plants with original technique is
·At present the full grain inclusion process of dynamic coal results in the production of slime as a byproduct during coal preparation The produced coal slime needs to be dehydrated and recycled properly otherwise it may lower the calorific value of separation cleaned coal compared to that of raw coal [10 11] Certain types of coal are more prone to producing
·The United States currently operates 268 coal preparation plants in 14 states according to the latest annual census of coal processing plants conducted by Coal Age [3] The facilities which are primarily located in West Virginia 80 Kentucky 56 and Pennsylvania 44 represent a total installed feed capacity of over 200 000 tons per hour
· 1 Crushing The large pieces of coal are sent to the jaw crusher by the vibrating feeder for rough crushing and the conveyor transports the coarsely crushed materials to the impact impact crusher is suitable for medium or fine crushing to further dissociate clean coal 2 Screening Thevibrating screen screens out three kinds of materials with
The roll crusher is the workhorse of coal size reduction to shear and/or compress the material coal gangue coal slime and middlings are also produced during this process which are complex mixtures containing small amounts of coal and many impurities minerals Currently more than coal preparation plants 2000 in China are
The coal preparation plant receives raw coal from two different sections Section 1 and Section 2 of Illinois No 5 coal seam blended in a desired ratio 75% from Section 1 and 25% from
·Traditional Coal Gangue Separation Process and Equipment Water washing and dry coal preparation are the main parts of coal preparation Spiral separation jigging heavy medium separation and other processes are water washing processes which have the advantages of mature technology high separation accuracy and large processing capacity
Based on the properties of the coal slime water the mechanism of flocculation and coagulation of particles in coal slime water was discussed and the reasonable feeding sequence and optimum dosage ratio was purposes of accelerating the subsidence of coal slime water in the thickener reducing the thickness of overflow and realizing the wash water closed circuit
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