Pulp preparation before flotation by a method of oil air agglomeration coal of particles / Klein M.S, Vahonina Т.Е.//The bulletin of KuzSTU, 2012, No 1.P.2830. Possibility to intensify process of flotation coal slimes at the expense of waterproof aggregation of small coal particles on air vials covered with oil is shown by pulp preparation before flotation by a …