Technological design of Huoerxinhe coal preparation plant

Analyse the raw coal properties of Huoerxinhe coal preparation plant through proximate analysis,elemental analysis,particle size composition and washability evaluation.The results show that,the raw coal is low and low-medium ash,while the latter is in the majority,low volatile,ultra-low and low sulfur,high and extra-high calorific value,easy and extremely-easy grindability,low reactivity to CO2 and medium slagging.The coal is brittle,frangible and difficult to degrade.The lump coal is medium washability while the density fraction is less than 1.7 g / cm3,the fine coal is easy washability and medium washability while the density fraction is less than 1.6 g/cm3 and 1.8 g / cm3 respectively.Based on the product structure of coal preparation plant,separate the lump coal and slack coal successively.The top size is 100 mm.Determine the suitable preparation process for Huoerxinhe coal preparation plant.Separate the 100 mm to 13 mm lump coal with heavy medium shallow groove,deslime 13.00 mm to 0.75 mm fine coal first,then separate with pressurized three-product heavy medium cyclone,separate 0.75 mm to 0.10 mm coarse slime with spiral separator.Concentrate the slurry-0.10 mm first,then recover and dry.Finally analyse the characteristics of the process,summarize the advantages of this process that each of lump coal and fine coal is processing,work and accidents concentrating machine are arranged in parallel.