| 摘要 |
FIELD: heating. ^ SUBSTANCE: invention relates to metallurgy and to processing solid industrial wastes. Proposed method comprises cooling the melting chamber housing by intermediate fluid-metal heat carrier, said housing being made as a two-wall metal shell with sealed space, and cooling said intermediate heat carrier by secondary gaseous heat carrier that flows through heat exchanger. Cold gaseous heat carrier is fed with flow rate of 0.05 to 0.50 nm3/s per 1 m2. Melting unit comprises melting chamber with hollow metal housing filled with intermediate fluid-metal heat carrier, i.e. sodium, heat exchanger, refractory lining, systems of burden loading, heating and melting, those of separate discharge of metal and slag, heat recovery and furnace gas purification. Heat exchanger is arranged directly on melting chamber housing. Heat exchanger shell represents a tight metal cylinder or its part with branch pipes to feed secondary gaseous heat carrier that envelopes melting chamber. Outer wall of the latter makes heat exchanger inner shell and stays at the distance of 50 to 300 mm from melting chamber wall along diametre. Bent copper bars are arranged between melting chamber outer wall and heat exchanger outer shell at 3 to 300 mm from each other. ^ EFFECT: simple and efficient unit. ^ 9 cl, 12 dwg |
