Patent EP-2439475-A1 (EP)
Inventor: FUCHS GERHARD
IPC: C21C5/52
Filed: 2011-09-30
Abstract: The charging device (1) comprises a shaft (2), shaft walls (4) held in a frame structure (3), a lower shaft base, an upper inlet opening for a charging material, and an upper limiting part limiting above an outlet opening of the shaft walls. One of the shaft walls is a front shaft wall situated at the front side of the shaft and comprises an outlet opening in the lower region for the charging material, and another is a rear shaft wall located in a rear side of the shaft wall and comprises a passage opening for a slider (13). The charging device (1) comprises a shaft (2), shaft walls (4) held in a frame structure (3), a lower shaft base, an upper inlet opening for a charging material, and an upper limiting part limiting above an outlet opening of the shaft walls. One of the shaft walls is a front shaft wall situated at the front side of the shaft and comprises an outlet opening in the lower region for the charging material, and another is a rear shaft wall located in a rear side of the shaft wall and comprises a passage opening for a slider (13). The slider is configured for batchwise conveying of charging material subsets from the shaft through the outlet opening by an actuating device from a first position pushable from the bottom of the shaft into a pushable second position, which is again pushed back into the first position. The upper limiting part: is raised and lowered by a pivot lever attached to the frame structure at its ends for horizontal pivot axis; and as a transverse beam is connected with the pivot levers with a lower first side surface, where a lateral second side surface facing an inner side of the shaft is formed. The horizontal pivot axis of the pivot lever is arranged at the rear shaft, and abutments are provided for supporting the pivot lever in the lowered starting position of the transverse beam at the front shaft in the frame structure. The first side surface of the transverse beam includes an obtuse angle with the second side surface. The transverse beam comprises a third side surface, which paralley extends to the second side surface, and the edge between the lower first side surface and the subsequent third side surface is formed through a tube. The transverse beam comprises a scaffold and channels for a cooling medium, where the scaffold and channels are connectable over a channel formed in the pivoting levers at a cooling circuit. The outlet opening is designed as a gas inlet for a heating gas for heating the charging material present in the shaft, and an upper side of the inlet opening is closable by a cover. A gas outlet for the heating gas is provided in the upper region of the shaft. A gas bypass line having a controllable valve is provided parallel to the flow path of the heating gas through the shaft. The gas inlet opening of the gas bypass line is arranged adjacent to the lower edge of the front shaft wall outside the outlet opening. The transverse beam is arranged: between the gas inlet opening of the gas bypass line and the front shaft wall in its lowered starting position; and in the region within the gas inlet opening in its lowered starting position. The gas bypass line is formed as a shallow gas pipe with broadsides arranged parallel to the front shaft wall. The ends of the transverse beam connected with the pivot levers comprise end portions, which are passed through slot-shaped recesses of the gas bypass line. Covering plates are provided at the end portions of the transverse beam, where the plates partially cover the slot-shaped recesses in the narrow sides of the gas bypass line.