APPARATUS FOR HEATING, DRYING AND CALCINING LOOSE MATERIALS Russian patent published in 2001 - IPC

FIELD: equipment for drying loose materials, mainly sand, possibly in different branches of industry, for example at making materials for sanders of railway road, sand, gravel for asphalt-concrete and building works. SUBSTANCE: apparatus for heating, drying and calcining loose materials includes housing with upper charging branch pipe and lower discharging hopper-branch pipe. Between branch pipes there is induction heating member in the form of apertured lengthwise-fin tube arranged inside tube of ferromagnetic material; electric winding is placed between outer and inner tubes. The last has outer finning that may be branched and have shape of "snow flake". Ends of tubes in upper and lower portions of apparatus are closed by means of magnetic shunts. Upper magnetic shunt is in the form of sleeve with lengthwise fins on outer surface and with branch pipe for discharging water-steam fraction and having valve for closing steam output in mode of blowing material with compressed air. Lower shunt is in the form of horizontal tube forming together with inner tube ventilated volume. EFFECT: enhanced reliability and efficiency of apparatuses with induction heating members. 5 cl, 3 dwg