复吹转炉多功能法脱磷工艺

在不新增设备的前提下,通过优化转炉冶炼工艺,使用复吹转炉多功能法进行铁水脱磷,提高转炉脱磷率.根据现有转炉设备条件,通过热力学计算确定转炉前期脱磷温度范围,并在现场实验中掌握好倒渣时机、渣碱度、加料量和出钢温度,确定最佳脱磷工艺.分析实验结果,与常规冶炼相比,该脱磷工艺用原料量少,脱磷率稳定,且高达90%以上,在提高钢水质量的同时也降低了生产成本.

Dephosphorization technique of converters by multi-functional refining

The dephosphorization rate of converters was improved through optimizing the converter refining process and applying the method of multi-functional refining in converters on condition that any new equipment was not used. Based on the present converter condition, the temperature range of dephosphorization was obtained by thermodynamics calculation. The suitable time of slag tapping, alkalinity of slag, tapping temperature and the quantity of material were determined, and finally the optimal dephosphorization technique was confirmed. Comparing with normal refining, the quantity of material could be reduced and the dephosphorization rate was above 90% steadily by using the new technique. Besides, the quality of molten steel was improved and the cost of production was also decreased.