基于示踪剂生产试验，通过对国内某钢厂BOF-LF-CC工艺生产的SPHC钢的洁净度和缺陷进行全流程系统取样和综合分析。结果表明，LF出站时钢液中大型夹杂物由钙处理后的19.6 mg/(10 kg)升至36.7 mg/(10 kg)。LF精炼后至中间包浇注，钢液中氧质量分数由23×10-6升高至(36～48)×10-6，存在一定的二次氧化现象。铸坯和热轧板卷中夹杂物示踪剂结果显示，精炼渣、耐火材料、中间包覆盖剂以及结晶器保护渣均有不同程度的卷渣或侵蚀，其中精炼渣的卷入和中间包耐火材料的侵蚀最为严重。
Based on tracer production experiment,the cleanliness of SPHC steel produced by BOF-LF-CC process in a domestic steel plant was investigated by the way of sampling systematically and comprehensive analysis. The results showed that the mass of macro-inclusion after LF refining increased to 36.7 mg/(10 kg) compared with that after calcium treatment which was 19.6 mg/(10 kg). From the tapping of LF refining to tundish,the average mass percent total oxygen in molten steel increased from 23 × 10-6 to (36-48) × 10-6 and existed a certain degree of re-oxidation. The results of tracer experiment revealed that serious entrapment of refining slag during LF refining and erosion of refractory in tundish occurred.
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