METHOD FOR IMPELLERLESS FLOTATION OF SUBSTANCES AND DEVICE FOR ITS REALIZATION Russian patent published in 1998 - IPC

FIELD: impellerless flotation of substances with low degree of hydrophobization and/or insignificant foam bond stability, in particular, salt mixtures. SUBSTANCE: method includes aeration of conditioned pulp with the help of aerating device and formation of aeration pump in the form of vertical free jet enclosed in shell and entering the separating chamber. Pulp is separated into foam and remaining product, and both are withdrawn from separating chamber. Aerated pulp coming from aerating device is diluted with pulp of low density or with carrying liquid. Formation of vertical free jet is made from mixture of aerated pulp and pulp of low density or carrying liquid. The device includes separating chamber, aerating device from which pulp is ejected in the form of free jet. Device is also has at least one vertical guide column open from atop. Aerating device is located under lower end of guide column and coaxial to it. Formed between aerating device and guide column are holes through which low-density pump or carrying liquid is supplied. EFFECT: higher efficiency. 12 cl, 5 dwg