8.2　Transmission Gear Box with Distributor Chute

8.2.1　Before the installation of the transmission gear box with the distributor chute，the installation precision of the furnace flange shall be checked，and the height difference of any two points of the upper plane of the flange shall be rechecked by level gaugeor levelling ruler and leveling instrument.The allowable deviation is 1/1000 of the diameter of the furnace top flange and shall not be larger than 3.0mm.When exceeding 3.0mm，methods，including grinding，may be used for treatment.

8.2.2　The transmission gear box with the distributor chute should be lifted by the furnace top crane on the furnace top platform and then by the crane below the movable track beam of the valve box in place.

8.2.3　The contaminations on the upper surface of the furnace top flange shall be cleaned and the sealing materials shall be placed as stipulated in the design document in accordance with the following requirements:

1　Sealant shall be painted on the surface of the flange and that of the sealing material respectively，and the thickness shall meet the requirements of the design document.When there is no requirement in the design document，the thickness should be 2mm and uniform.

2　The number of the rings of the rope-type sealing tape shall meet the requirements of the design document.The space between two rings shall be uniform.The joint should be mutually staggered 300mm-500mm.

8.2.4　After installing the transmission gear box with the distributor chute，the longitudinal and transverse centerline shall be adjusted and centered，with the allowable deviation of 3.0mm；meanwhile，the levelness shall be adjusted，with the allowable deviation of 0.50/1000.

8.2.5　Connecting bolts between the transmission gear box with the distributor chute and the furnace top flange shall be symmetrically fastened，and the fastening force shall meet the requirements of the design document.