8-09,9-12 type cupola special high-pressure centrifugal fan, suitable for 1L / h, 2L / h, 3L / h, 5L / h, 7L / h blast cupola melting rate of performance requirements. The fan can also be used as a variety of furnace blast furnace with Kaji, but also for conveying air and non-corrosive, not spontaneous, non-sticky material containing gases. Transmission medium temperature does not exceed 80 ℃, dust and hard fine particles contained in the medium is not greater than 150mg / m3. 8-09,9-12 fan impeller, housing, air inlet, transmission group, seals, frame and other components, for 8-09 machine number using a local assembly structure, with the overall structure of the other machine number. 8-09,9-12 type fan can be made of clockwise and counterclockwise rotation of two types, from the motor end face, such as the impeller rotates clockwise, clockwise rotation of the fan said, to "shun" said press counter-clockwise, counterclockwise rotation of the fan said to "reverse" said.