TY JOUR TI USE OF WASTE COAL FOR THE PURPOSE OF OBTAINING RAW FOR THE PRODUCTION OF WALL CERAMIC BRICKS KW waste coal enrichment KW environmental pollution KW semi-dry method of pressing KW plastic molding method KW clay raw materials KW wall ceramic brick JO Bulletin of Belgorod State Technological University named after. V. G. Shukhov AU Tang, V.L. AU Bulgakov, B.I. AU Aleksandrova, O.V. AU Larsen, O.A. AU Shuvalova, E.A. AU Dao, V.D. PY 2017 IS 2 PB Belgorod State Technological University named after V.G. Shukhov