| Introduction of Advance Lining System for Tundish at Durgapur Steel Plant |
P. K. Roy Choudhury, D. Halder, R. K. Ahuja, S. Sarkar, K. Patwari,
B. D. Chattoraj, A. Majumdar and P. Dutta
Pages : 111-114
DOI :10.1080/0371750X.2006.11012285 |
| Abstract |
| Developments in the continuous casting of steel have put increased demands on the refractories used in the tundish. Tundish working lining systems are required to provide the steel maker with a clean steel practice over a reasonably longer sequence, proper insulation, wear resistance, flow control and easy deskulling. In order to achieve these objectives, the tundish lining material also advanced significantly. The present practice of using silica board as cold tundish working lining material in Durgapur Steel Plant has some limitations in the aforesaid requirements.
This paper deals with a “dry tundish working lining system” which allows the steel maker to produce cleaner steel. This material contains around 80% MgO and resinous bond. This bond is activated at relatively low temperature (250°-300°C) to generate sufficient strength. The thickness of the working lining varies between 40 and 60 mm depending on tundish size and sequence length. Dry tundish working lining can be used replacing SiO2 or MgO boards in cold tundish practice. In addition, the other components of the tundish working lining, e.g. impact pads/turbo-inhibitors, metering nozzles, dams are also looked into to match the higher sequence length. The system has been proven as a cost effective refractory solution for long multiple sequence casts. |
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