论文部分内容阅读
我国首台30吨直流钢包精炼炉是由安阳钢铁公司、北京科技大学、鞍山热能研究院三家联合开发研制的.安钢提供改造研制资金并负责土建、机械设备改造.北科大负责精炼炉工艺参数设计、计算机软件、计算机控制系统及还原渣发泡剂研制.鞍山热能院负责电气整流、控制系统及电极升降控制系统设计、制造和安装.经三方通力合作.试生产的30炉中,钢包渣线及包村仅有少量侵蚀.从现场操作情况估计.此包龄至少可使用到50炉以上.如连续使用可望包龄达到更高水平.这台直流钢包精炼炉是原安钢一台25吨三相交流LF炉改造的.由于三相交流LF炉的三根电极距包衬较近,包龄仅6～8次,故无法正常运行.一直闲置6年之久.为把这台设备利用起来.经三方共同协商决定,把它改为直流钢包精炼炉.改造方案为:输入功率按150kW/t钢.变压器额定功率为4000kVA,整流采用双副边12脉冲整流,控制系统采用计算机分级控制.直流电压200V.额定流20kA.电极布量为并列式.两侧为阳极.中间为起弧阴极.两个阳极各串一台空冷电抗.原设计包龄30炉,升温速度2.5～3.0℃/min,电极消耗 0.5kg/t钢.电耗100kWh/t.实际试生产证明:
China’s first 30 tons of DC ladle refining furnace by the Anyang Iron and Steel Company, Beijing University of Science and Technology, Anshan Institute of Thermal Energy jointly developed three. Anyang to provide the necessary funds for the reconstruction and construction of civil engineering, machinery and equipment transformation. North Branch responsible for refining furnace process parameters Design, computer software, computer control system and reduction slag blowing agent development. Anshan Institute of Energy is responsible for electrical rectification, control system and electrode lifting control system design, manufacture and installation .Through the tripartite cooperation .Test production of 30 furnaces, ladle slag Only a small amount of erosion line and package village from the scene operating conditions are estimated.This package age can be used to at least 50 furnaces such as continuous use is expected to reach a higher level of package age.The DC ladle refining furnace is a steel 25 tons of three-phase AC LF furnace transformation .Because the three-phase AC LF furnace from the liner near the packet, the age of only 6 to 8 times, it can not be normal operation has been idle for 6 years. To put this device Make use of them.Through the tripartite negotiation and decision, change it to the DC ladle refining furnace.Reforming scheme is as follows: The input power is according to 150kW / t steel.Transformer rated power is 4000kVA, Rectifier adopts double secondary 12 pulses Rectifier, control system using computer grading control. DC voltage 200V. Rated flow 20kA. The amount of cloth for the electrode side by side. On both sides of the anode. The middle of the arc cathode. Two anodes each string of an air-cooled reactor. Furnace, heating rate 2.5 ~ 3.0 ℃ / min, electrode consumption 0.5kg / t steel. Power consumption 100kWh / t. The actual trial production proved: