攀钢钒转炉冶炼低硫钢增硫因素分析及控制

通过对攀钢钒120 t复吹转炉冶炼低硫钢种(w(S)≤0.005%)时的回硫有关因素进行分析,原材料质量、脱硫后残余渣量及转炉渣性质是造成增硫的主要因素。结合生产实践,提出了稳定脱硫能力、二次稠渣除渣、提高半钢质量,减少增碳剂用量、使用优质石英砂替代高硫造渣材料及优化转炉终点控制等具体措施,攀钢钒现具备小批量生产转炉终点w(S)≤0.005%能力。

ANALYSIS AND CONTROL OF RESULFURIZATION FACTORS FOR LOW -SULFUR STEEL IN VANADIUM CONVERTER

The quality of raw materials, the amount of residual slag after desulfufization and slag property are the major factors of resulfurization by analyzing resulfurization phenomenon of low- sulfur steel （w（S） 40. 005% ） in 120 t re -blo- wing converter. Some measures such as stabling the capacity of desulfufization ,secondary deslagging,improving the quality of semi - steel, reducing the amount of carburant, using the high - quality quartz sand instead of slagging materials and opti- mizing the high - sulfur end point control are also put forward on the basis of production practice. Now it has the capacity of small batch converter end of w（S） ≤0.005%.