Patent ID: 7204689
Filing Date: 2007-04-17
Classification: C21B,F27D,Y10S

Abstract:
1. A sealing structure which seals gaps between a heating furnace for heating a solid material and a liftable solid-transferring screw extending through side walls of the heating furnace, wherein the solid-transferring screw has a driving shaft substantially horizontally arranged and a helical blade fixed on the driving shaft; the driving shaft passes through through-holes for screw-driving shaft which are formed in the side walls of the heating furnace, each of the through-holes having a vertical size which is larger than the diameter of the driving shaft by at least a lifting range of the solid-transferring screw, the driving shaft being supported by liftable supporting devices which are disposed at the outsides of the heating furnace; sealing blocks are attached on the outer edges of the through-holes for the screw-driving shaft so as to surround the periphery of the through-holes at the outsides of the heating furnace; and sliding panels are disposed at the outer sides of the sealing blocks of the furnace, each of the sliding panels having a sliding hole for sliding the screw-driving shaft so that the driving shaft extends through the sliding hole, each of the sliding panels being slidable in the vertical direction while airtightness between the sliding panel and the sealing block is retained.