滑板挡渣在承钢提钒和炼钢转炉应用.doc

滑板挡渣技术在提钒和炼钢转炉应用 钢铁集团承钢公司热轧卷板事业部067002） 摘要：滑板挡渣是移植大包滑动水口原理，在传统转炉的出钢口位置安装滑动水口装置，结合红外下渣检测和计算机控制，当出现下渣时，立即关闭滑板以彻底切断钢流达到挡渣的目的。因关闭速度快（0.6S内），出钢前期和后期下渣量均得到有效控制，钢水洁净度提高，脱氧剂成本也随之降低。滑板挡渣技术应用于提钒转炉为国内首次应用于提钒转炉，下渣量明显减少，钒回收率明显提高，经济效益显著。此外，部分元素在提钒工序氧化进入钒渣，而滑板挡渣技术有效降低了下渣量，使用提钒半钢炼钢后的产品残余元素降低。 关键词：转炉，钒渣，提钒转炉滑板挡渣 Slag-Stopping Technology by Slide Gate in BOF for Steel-making And Vanadium-Extraction at Chengde Steel Hongjia Huang Hai Gao Li Wu （Hot-rolled coil Division, Chengde Iron and Steel Company, Hebei Iron and Steel Group, ChengDe, HeBei Province, 067002） Abstract: The control principle of slide gate on BOF is similar to that of ladle after being transfered to CC. Combined with infared slag detection, PLC and hydraulic system, a swift openning and closing(in 0.6s) is achieved on slide gate, which realizes the effective control of carrier-over slag in earlier and later stage during tapping, avoiding slag outflowing to ladle. Additionally, the purity of steel is improved and the cost of deoxidation agent is reduced. While slide gate slag-stopping technology is utilized on BOF for vanadium extraction, it’s the first time to capitalise on this technology. The result was proved remarkable: the yield rate of vanadium slag is extentially higher than any other slag-stopping technology, which facilitates Chengde Steel better economic benefit. Furthermore, due to parts of elements are oxidized as composition of vanadium slag at the process of vanadium-extraction, slide gate slag-stopping technology makes it possible that less vanadium-slag outflow into semi-steel, a byproduct of vanacium-extraction and raw material of steel-making. The content of residual elements of fianl product such as Cr and V are decreased. Key words: converter, vanadium slag ; vanadium extraction converter ; slide gate 0 引言 近年来，滑板挡渣技术不断完善、成熟，在宝钢、首钢、等大型钢铁企业得到成功应用，滑板挡渣已成为转炉挡渣发展的趋势以及冶炼高端品种钢的必要手段提取的主要原料是一种银灰色的金属，熔点，属于高熔点金属，将其加入就能使的弹性、强度大增，抗磨损和抗爆裂性极好，既耐高温又抗严寒，被广泛应用于汽车、航空航天、铁路、、电子技术、国防工业等领域工业的味精维生素”美誉，钒是不可再生的的战略资源