MODULAR METHOD OF IMPROVING QUALITY AND SYSTEM FOR IMPROVING QUALITY OF OIL SHALE IN HIGH-DENSITY COAL BEDS

摘要

FIELD: production of fuel.;SUBSTANCE: proposed group of inventions relates to method and system for separation of oil shale of high-density coal beds to improve its quality. When using the content of moisture of oil shale as an indicator, if the combustible shale has moisture content less than 10 %, the method involves: separation with respect to the material with particle size of more than 13 mm, using a fluidized layer of the heavy air medium, performing separation with respect to material with particle size of not more than 13 mm and not less than 6 mm, by means of fluidized layer of heavy air medium, performing separation with respect to material with particle size of not more than 6 mm and not less than 3 mm, by means of vibrating fluidized layer of heavy medium, and performing separation with respect to material with particle size of not more than 3 mm, using vibrating fluidized layer, and medium regeneration by means of magnetic separation for use as circulating medium. If the oil shale has moisture content of more than 10 %, the method involves: separation with respect to the material with particle size of more than 13 mm using a combined dry separator, separation with respect to material with particle size of not more than 13 mm and not less than 6 mm, using a combined dry separator, separation with respect to material with particle size of not more than 6 mm and not less than 3 mm by means of a vibrating fluidized layer, and separation with respect to material with particle size of not more than 3 mm, using a vibrating fluidized layer. Separation for each size class separates oil shale into concentrate and residue.;EFFECT: raised efficiency of separation of oil shale of high-density coal beds, and also increased quality of oil shale.;10 cl, 4 dwg, 2 ex