[China Aluminum Network] Tangshan Iron and Steel Group Co., Ltd. 1700mm hot rolling production line surface defect monitoring device put into use, can fully and accurately monitor the number and location of surface defects in hot rolled coil volume; through tracking inspection found that: the process of production of low carbon When aluminum-killed steel, the surface defects of hot-rolled plates are mainly slag inclusions. Due to the slag slag surface modification rate of up to 14%, seriously affecting the production of stable and comprehensive finished product rate. Tanggang 1700mm production line is equipped with medium-thickness slabs, and low-carbon aluminum killed steel is produced by the LF refining process. In order to avoid nozzle clogging, the station is treated with calcium.
Scholars of Tangshan Iron and Steel Group Co., Ltd. have investigated the formation of slag on the surface of hot-rolled plates of low-carbon aluminum killed steel produced by LF refining and medium-thin-slab continuous casting. Optimizing the production process of steelmaking and LF refining, reducing the TO content in the steel; improving the quality of the refractory material in the continuous casting, reducing the secondary oxidation, and stabilizing the calcium treatment effect; solving through the improvement of the submerged nozzle structure and the optimization of the mold flux performance Mold casting slag at steady state casting and the resulting slag inclusion on the hot rolled plate surface.
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