Baoshan Iron & Steel Co., Ltd.

Xufeng Liu

Jianjun Zhi

Zhengjie Fan

Guoqiang Liu

Hua Gao

Hongguang Zheng

Zhiqiang Zhang

A tundish, wherein a steel passing hole () is provided at a lower portion of a gas-curtain weir refractory body (); an argon duct (), a gas chamber () and a gas-permeable brick () are connected to form a gas-curtain generating device, and the gas-curtain generating device is installed at the lower portion of the gas-curtain weir refractory body (); the gas-permeable brick () is provided in association with the position of the steel passing hole (), and a length of the gas-permeable brick is designed larger than a width of the steel passing hole (); and a gas-curtain weir plate () is provided in a tundish container, the gas-curtain weir refractory body () crosses the tundish container horizontally, and divides the tundish container into a first region and a second region.

Tundish

Disclosed is a flow-controllable tundish structure capable of filtering inclusions in molten steel. The tundish structure comprises a tundish (), the tundish being divided into three separated cavities which comprise an impact zone cavity () in the middle and pouring zone cavities () at two sides thereof. A long nozzle () for pouring is vertically arranged in the center of the impact zone cavity, and molten steel flows down out of the long nozzle for pouring and is injected into the impact zone cavity; and a turbulence suppressor () directly facing the long nozzle for pouring is arranged on the cavity bottom under the long nozzle for pouring, and the molten steel flowing down out of the long nozzle for pouring impacts on the turbulence suppressor and is then buffered and mixed. Filter assemblies (A) are respectively arranged between the impact zone cavity and the pouring zone cavities at the two sides, and the buffered and mixed molten steel in the impact zone cavity is filtered by the filter assemblies and is then delivered into the pouring zone cavities at the two sides. Discharge ports () are respectively arranged in the bottom of the pouring zone cavities, and the molten steel filtered by the filter assemblies flows into the pouring zone cavities and then flows out from the discharge ports. The flow-controllable tundish structure has the advantages of a simple structure, easy building and lower cost, and has a good liquid steel purification effect.

Flow-controllable tundish structure capable of filtering inclusions in molten steel

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Shanghai, China

Xufeng Liu