CaSi Cored Wire Feeding Prevent Tundish Nozzle Clogging
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摘要: 經解剖中間罐水口堵塞樣品,查清堵塞原因主要是高溶點的樹枝狀Al2O3,鐵尖晶石夾雜粘附在水口壁上并聚集長大。經在鋼包中喂入直徑13.5mm CaSi芯線,喂速120~130m/min,1t鋼喂入量0.26~0.86kg,使原有高熔點夾雜變為低熔點的復合氧化物,不再堵塞中間罐水口,夾雜球化,而且很細小。Abstract: The tundish nozzle clogging samples were taken and analyzed. The clogging causes are understood. Main cause is Al2O3 inclusion and hercynite inclusions stick on the nozzle wall and accumulated. By feeding Φ13.5mm CaSi cored wire, the rate of feeding was 120~130m/min or 0.26~0.86 kg/t. The high melting point inclusions were changed into low melting point complex oxides. There was no longer tundish nozzle clogging observed. The most part inclusions were modified into spherical inclusions and their size was small.
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Key words:
- continuous casting /
- tundish /
- nozzle/wire feeding /
- clogging
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