[en] Present article is devoted to elaboration of formulation and production technology of coating-refining flux for aluminium casting. The results of studies on the elaboration of formulation and production technology of coating-refining flux for the transportation of molten aluminium and its casting with the usage of industrial wastes containing sodium and calcium chlorides which comes in the form of variable composition of precipitation at natural evaporation of solutions of sludge fields at summer have been discussed. (author)