SET FOR CRYSTALLIZATION OF SOLID PHASE FROM SOLUTIONS Russian patent published in 1996 - IPC

FIELD: non-ferrous metallurgy; sets for crystallization of aluminium hydroxide from super-saturated aluminate solutions. SUBSTANCE: set consists of one or several crystallizers with heat exchanger mounted between them. Heat exchanger is connected with crystallizer by means of pipe line made in form of siphon lowered in lower portion of crystallizer; pipe line is connected with tangential solution inlet branch pipe mounted in lower conical portion of heat exchanger. Located in center of heat exchanger is airlift tube to which air is fed through pipe line. Mounted tangentially at level of branch pipe introducing liquid to heat exchanger is branch pipe for additional supply of air to conical portion of hat exchanger. Branch pipe fitted in lower portion of conical bottom is used for discharge of suspension. Invention provides for reliable operation of decomposers at decomposition of aluminate solutions due to cleaning of suspension from large inclusions. EFFECT: increased productivity and enhanced reliability. 2 cl, 3 dwg, 1 tbl