The invention discloses a high-efficiency annealing furnace capable of avoiding bonding of cold-rolled
strip steel and an operating method thereof. The high-efficiency annealing furnace comprises a high power blower, a segment of independent flow
guide tube, guide plates provided with upper flow guide tubes and lower flow guide tubes, a guide plate only provided with a lower flow
guide tube, and a sealing ring. The annealing furnace is characterized in that the independent flow
guide tube (4) is positioned at the core of a first cold-rolled steel coil on a furnace platform and sleeves a reserved air port of the blower on the furnace platform in a ring manner; the upper part of the independent flow guide tube (4) is connected with the lower flow guide tubes (9) of the guide plates (5) provided with the upper flow guide tubes and the lower flow guide tubes through the
heat resistant sealing ring (8); the upper flow guide tubes and the lower flow guide tubes of the guide plates (5) provided with the upper flow guide tubes and the lower flow guide tubes are sequentially connected through the
heat resistant sealing ring (8); and the guide plate (6) at the upmost end is only provided with the lower guide tube (9) and is arranged between two top steel coils. In the invention, the adopted heat cycle path is as follows: a heating mantle (a cooling mantle), an inner cover, protective gas in the furnace after completing warming (cooling)
convection in the middle part, outer rings of the steel coils, and heat
radiation of the cores of the steel coils, thus strengthening the
convection effect in the middle part and reducing the phenomenon of unbalanced inner temperature and outer temperature.