FIELD: process and equipment for producing of aluminosilicate microspheres.
SUBSTANCE: method involves separating aluminosilicate microspheres from ash and slag wastes by submerging said wastes into liquid; collecting aluminosilicate microspheres from liquid surface and drying in two stages: first drying stage involving holding of aluminosilicate microspheres at temperature of at least 2 C until residual moisture content of microspheres is below 30%, and second drying stage involving heating of aluminosilicate microspheres to temperature of 100-300 C in drum-type furnace by direct contacting of aluminosilicate microspheres with drum surface heated by means of external heating source until relative moisture content of microspheres is less than 3%. Furnace for drying of dispersed materials comprises drying chamber having inlet and outlet and made in the form of cylindrical drum mounted for rotation around its axis. Drying chamber inlet is equipped with device for feeding of material to be dried therein, and outlet is equipped with device for removal of dried material therefrom. Axis of cylindrical drum is positioned at an angle to horizontal plane so that drying chamber inlet is arranged higher than its outlet. Cylindrical drum is mounted on two axially aligned shafts positioned for rotation around their axes and connected with drum. First shaft is disposed adjacent drying chamber inlet and second shaft is disposed adjacent drying chamber outlet and is made hollow. External heat source is arranged outside cylindrical drum so as to heat drum wall. Device for feeding material into drying chamber is formed as vibrating trough and device for removal of dried material from drying chamber is formed as screw mounted within second shaft.
EFFECT: reduced consumption of power, increased efficiency in drying of dispersed materials containing low weight particles, preferably hollow aluminosilicate microspheres, with increased extent of moisture removal, and provision for preventing microspheres from getting into atmosphere.
17 cl, 2 dwg
