Patent DE-102009033934-B3 (DE)
Title: Device for temporarily sealing a tap hole, which has a first internal diameter and is provided in the bottom of a metallurgical furnace, for filling the tap hole with free-flowing fire-resistant compound, comprises sealing and filling pipe
Inventor: FUCHS GERHARD
IPC: F27D3/15
Filed: 2009-07-20
Granted: 2011-02-03
Abstract: The device for temporarily sealing a tap hole, which has a first internal diameter and is provided in the bottom of a metallurgical furnace, for filling the tap hole with a free-flowing fire-resistant compound, comprises a sealing and filling pipe (31) with a first length and a bottom opening and a top opening, a first container (32) for filling compound, an opening and closing device (13), and a lifting mechanism, in which the sealing and filling pipe, the first container and the opening and closing device are fixed to the lifting mechanism. The device for temporarily sealing a tap hole, which has a first internal diameter and is provided in the bottom of a metallurgical furnace, for filling the tap hole with a free-flowing fire-resistant compound, comprises a sealing and filling pipe (31) with a first length and a bottom opening and a top opening, a first container (32) for filling compound, an opening and closing device (13), and a lifting mechanism, in which the sealing and filling pipe, the first container and the opening and closing device are fixed to the lifting mechanism in such a way that the first container is connected to the top opening of the sealing and filling pipe under the interposition of the opening and closing device such that the connection is opened and closed by the opening and closing device under the control of a control device. The sealing and filling pipe has an external diameter, which is greater than the first internal diameter, on its underside and the lifting mechanism is designed to permit the sealing and filling pipe to be moved in the longitudinal direction of the same at a speed of greater than 200 mm/s. The lower side and the inner side of the sealing and filling pipe have a melting point of greater than 1750[deg] C and a minimum thickness of 50 mu m up to a minimum height and consist of a hard chrome coating as the metallic material and a galvanically deposited metal coating with a strength of 150-300 mu m as the metallic material, up to the minimum height. The lifting mechanism is formed as lifting- and rotating tool. A sealing mass is applied at the under side of the sealing and filling pipe and has a height in longitudinal direction of the sealing and filling pipe of 20 mm. The material of the sealing mass is formed from elastic material such as rubber, perfluorelastomer, polyethylene or polytetrafluorethylene. The sealing and filling pipe has a second inner diameter that is larger or equal to the first internal diameter. The lifting mechanism and the control device are adapted to measure a process way of sealing- and filling tube in longitudinal direction and to control the process speed in dependent upon the measurement. A final interval of = 50 mm is covered before sealing with reduced processing speed during lowering the sealing and filling pipe. The lifting mechanism is formed for active processing of sealing- and filling tube with a speed of >= 200 mm/s in order to release a movement of the sealing- and filling tube in longitudinal direction through the gravity of the mass of the sealing- and filling tube and additional weight. The lifting mechanism is formed for active processing of sealing- and filling tube in vertical direction towards the gravity with a speed of = 200 mm/2. Independent claims are included for: (1) a metallurgical furnace; and (2) a method for contrasting a metallurgical furnace.