LF炉温度控制曲线.docx

1、LF炉温度控制曲线LF炉温度控制曲线LF Furnace temperature control curve二LF钢包精炼炉工艺流程及作业周期（min）Second. LFLadle refining furnace process and operation cycle(min)1 工艺流程图1 Process flow diagram2 作业周期（min）2 Operation cycle (min)No.ItemLadle service time（min）Remarksa. 电炉出钢、初炼钢水兑入精炼钢包、粗合金化、加保护渣Electric arc furnace tapping, i

2、nitial smelting molten steel refining ladle, blended crude alloying, plus protective slagb. 测温取样Temperature measuring and sampling0.5c. 钢包车载包运行至加热工位Ladle car package run to the heating station0.5d. 水冷炉盖下降到位，送电加热，补加渣料0.51%。Water cooled furnace lid fall in place, to send electric heating, adding slag0

3、.51%.5e. 停电、测温取样Power off, temperature measuring and sampling0.5f. 送电、补加合金料，S高时仍需补加0.51%渣料，待渣料化匀，用还原剂还原，分批加入撒匀，以确保炉内埋弧渣良好，渣中（FeO0.5%）。Power transmission, adding alloy material, S is still needed to be added in 0.5 1% slag, the slag of uniform, with a reductant batch addition, sprinkle, to ensure tha

4、t the furnace submerged arc slag, slag ( FeO 0.5% ).15g. 渣白，停电，测温取样。Slag white, power off, temperature measuring and sampling.0.5h. 根据钢水温度，调整电压、电流，用少许还原剂保持白渣（保温等样）。According to the temperature of the molten steel, adjust the voltage, current, with a reducing agent to maintain white slag ( heat prese

5、rvation and the like ).4i. 测温，取样Temperature measurement, sampling0.5j. S进入规格，微调成份，停电提升电极、炉盖S into the specification, fine-tuning ingredients, power off ascension electrode, the furnace cover 5k. 钢包车开出、喂丝软吹（不裸露钢液）Ladle car out, thread feeding soft blow (not bare steel liquid)8l. 吊包至后处理工位。Crane packet

6、s to post-processing work station. 0.5小计Total40No.ItemLadle service time（min）Remarksm. 电炉出钢、初炼钢水兑入精炼钢包、粗合金化、加保护渣Electric arc furnace tapping, initial smelting molten steel mix refining ladle, blended crude alloying, plus protective slag.n. 测温取样Temperature measuring and sampling0.5o. 钢包车载包运行至加热工位Ladl

7、e car package run to the heating station.0.5p. 水冷炉盖下降到位，送电加热，补加渣料0.51%。Water cooled furnace lid fall in place, to send electric heating, adding slag 0.5 1%.5q. 停电、测温取样Power off, temperature measuring and sampling0.5r. 送电、补加合金料，S高时仍需补加0.51%渣料，待渣料化匀，用还原剂还原，分批加入撒匀，以确保炉内埋弧渣良好，渣中（FeO0.5%）。Power transmiss

8、ion, adding alloy material, if S is high, still needed to be added in 0.5 1% slag, the slag of uniform, with a reductant batch addition, sprinkle, to ensure that the furnace submerged arc slag, slag ( FeO 0.5% ).15s. 渣白，停电，测温取样。Slag white, power off, temperature measuring and sampling.0.5t. 根据钢水温度，调

9、整电压、电流，用少许还原剂保持白渣（保温等样）。According to the temperature of the molten steel, adjust the voltage, current, with a reducing agent to maintain white slag ( heat preservation and the like ).4u. 测温，取样Temperature measurement, sampling0.5v. S进入规格，微调成份，停电提升电极、炉盖S into the specification, fine-tuning ingredients

10、, power offto ascension electrode, the furnace cover.5w. 钢包车开出、喂丝软吹（不裸露钢液）Ladle car out, thread feeding soft blow (not bare steel liquid)8x. 吊包至后处理工位。Crane packets to post-processing work station.0.5小计Total40三LF-90t精炼炉工艺操作描述Third.LF-90tFiner furnace process operation description 1 LF炉精炼阶段1LF Furnace

11、 refining stage电弧炉出钢，根据生产工艺确定精炼包钢水装入量，通过冶炼浇铸跨行车吊包座包于90tLF炉钢包车上，人工接通氩气管，钢包车载包运行至加热工位（定位精度5mm），水冷炉盖下降封闭钢包，三相电极下降，送电加热。送电过程中使用正常的吹氩氩量进行搅拌，通过加料系统补加渣料。由于热平衡，送电初期钢液温度继续下降，34min开始升温。精炼期加还原剂还原，分批加入，少批量，多批次撒匀。同时将试样速送至化验室进行快速分析。Arc furnace tapping, according to the production process to identify refining stee

12、l water loading, through smelting casting crane packets packets to cross 90tLF furnace steel car, artificial trachea on argon ladle car package, running to the heating station ( positioning accuracy of 5mm ), water-cooling furnace cover sealing ladle drop, three-phase electrode decreases, send elect

13、ric heating. Transmission process using normal argon blowing argon stirring volume, by adding slag material feeding system. The heat balance of power transmission, initial temperature of molten steel continued to decline, 3 4min began to heat up. Refining period is reduced by adding reducing agent,

14、batch addition, little batch, batch sprinkle. At the same time samples will be sent to the laboratory for rapid analysis speed.根据化验分析值与钢种目标值之间的差值，计算出需要加入合金的种类和物料质量，在规定时间内将规定牌号和数量的合金料经称量送至LF炉受料斗，启动受料斗闸门，合金料即可加入钢包，达到合金调整之目的。第二阶段送电还原后停电，测温、取样，合金成分进入钢种规格后，然后调整电压、电流保温，测温，温度达到要求，喂CaSi丝，终脱O，脱S，以改变氧化物、硫化物的形

15、态和分布。喂丝速度在喂丝机上按工艺要求设定，喂丝机控制柜上设有显示喂入长度的计数器和速度控制器，以一定速度加入至预定长度后会自动停止喂丝，此阶段采用较小的吹氩量进行“软吹”。 S进入规格，可根据需要微调个别合金元素，升电极，提起水冷炉盖。According to the analysis of value and the difference between the steel target value, calculates the need to join the alloy type and material quality, in the specified time will be

16、stipulated and quantity of alloy material by weighting sent to LF furnace hopper, started receiving hopper gate, alloy material can be added to steel, alloy adjustment purposes. Second phase power transmission reduction after the blackout, temperature measurement, sampling, alloy composition into th

17、e steel specifications, and then adjust the voltage, current insulation, temperature measurement, temperature reaches the request, CaSi wire feeding, endoff O, and S , to change the oxide, sulfide morphology and distribution. Wire feeding speed in wire feeding machine according to the requirement of

18、 process setting, wire feeding machine control cabinet is provided with a display of feeding length counter and a speed controller, at certain speed to join to a predetermined length will automatically stop feeding, this stage by using a smaller amount of soft blowing argon blowing. S into the speci

19、fications, according to the need to fine-tune the individual alloying elements, or electrode, mentions the water-cooling furnace cover.2 开出加热工位至后处理工序阶段2 Open the heating station to post-treatment process stages钢包车开出加热工位至后处理工序，至此LF炉一个冶炼周期完成。Buggy ladle move out of heating station to post processing p

20、rocess, thus a complete LF furnace smelting cycle.四主要技术参数Fourth.Main technical parameters序号名称数值备注 S.N. Name Numerical Note 1 额定容量 80t Rated capacity 80t平均钢水容量 80tAverage molten steel capacity 80t精炼最小钢水容量 70t Minimum capacity of refining molten steel 70t最大钢水容量 90t The maximum capacity of molten steel

21、 90t 2 钢包 2 Ladle包壳上口直径 3200mmShell opening diameter3200mm自由空间高度 800mm Free space height800mm 3 钢包车 3 Buggy ladle最大承载 200tMaximum load 200t行走速度 2-25m/min（可调）Walking speed2-25m/min（adjustable）驱动方式机械式，电机-减速器Drive modeMechanical type, motor reducer轨道中心距 3500mmCenter distance of the track3500mm调速方式变频调速S

22、peed control modeVariable frequency speed regulation停车定位精度 5mmParking positioning accuracy 5mm 4 电极升降装置 4 Electrode lifting devices电极直径 450mm 高功率电极Electrode diameter 450mmHigh power electrode 电极分布园 740mmElectrode distribution garden 740mm电极最大行程 2800mm Electrode biggest travel2800mm电极升降速度Electrode li

23、fting speed 自动5/3.6m/min 上升/下降Auto 5/3.6m/min up/down手动：64.5 m/min 上升/下降Manual64.5 m/min up/down 5 短网 5 Shortnet阻抗绝对值 2.4mImpedance absolute value 2.4m三相阻抗不平衡 4%（静态）Three-phase impedance imbalance 4%（Static）水冷电缆 4200mm2共六根每相两根Water-cooled cable 4200mm2A total of six roots ,per phase two 6 水冷炉盖密排管式水冷

24、炉盖，附集烟罩 6 Water cooled furnace lidDense row of pipe type water-cooling furnace cover, with a smokecover烟气排放量 200000Nm3/h (混风后烟气温度500)Flue gas emissions 200000Nm3/hThe flue gas temperature mixed with wind is less than 500 7 桥架及炉盖提升装置 7 Bridge shelf and furnace cover ascension device 提升高度 400mmlift he

25、ight400mm提升方式液压缸+重载板式链The way to improveHydraulic cylinder + heavy plate chain升降速度 3040mm/sLifting speed 3040mm/s 8 电极接长站 8 Electrode joins long standing 规格 450mmSpecifications450mm工作方式电极自重夹紧（手动操作）Mode of operationElectrode self-respect clamping (manual) 9 氩气系统 9 Argon system 氩气供气压力 1.6MPa(氩气汇流排入口压力

26、)Argon gas supply pressure 1.6MPa(argon converge-wires inlet pressure) 氩气工作压力 0.2 0.8MPa(钢包入口压力)Argon work pressure 0.2 0.8MPa(Ladle inlet pressure )氩气耗量Argon consumption最大 600Nl/minMaximum600Nl/min通常 50150Nl/min Usual50150Nl/min事故状态氩气压力 1.6MPa In accidentstate argon gas pressure 1.6MPa 10 压缩空气系统(动力

27、用气) 10 Compressed air system (use gas) 压力 0.4MPaPressure 0.4MPa耗量 10Nm3/hConsumption10Nm3/h 11 LF炉冷却水装置11 LF Furnace cooling water unit 进水温度 35Inlet water temperature35回水温度 55Return water temperature 55进水压力0.30.5MPa 无压回水 Inlet water pressure0.30.5MPaNo pressure return water耗量：水冷炉盖 130 m3/h 无压回水Consu

28、mption: Water cooling furnace cover 130 m3/hNo pressure return water设备本体耗量 120 m3/h 无压回水Equipment ontology consumption 120 m3/hNo pressure return water变压器冷却水 40 m3/h 无压回水Transformer cooling water 40 m3/hNo pressure return water液压站冷却水 10 m3/h 无压回水Hydraulic pressure station cooling water 10 m3/hNo pre

29、ssure return water事故应急水 100 m3/h 0.2MPa，持续30minAccident emergency water 100 m3/h0.2MPa，continue 30min 12 液压系统12 Hydraulic system 工作压力 12MPaWork pressure 12MPa工作介质水乙二醇Working medium water-glycol 13 精炼炉变压器 13 Finer furnace transformer 额定容量 16000kVA 可长期过载20% Rated capacity16000kVA allow long-term overl

30、oad 20%一次电压 35kVPrimary voltage 35kV二次电压 330280190 V Secondary voltage330280190 V 11级有载电动调压11 stage load electric voltageregulating二次电流 36926ASecondary current 36926A 14 钢包烘烤终点温度 1000 14 Ladle heating end temperature1000 15 钢水平均升温速度 4.5/min 15 Averagetemperature raise velocity of molten steel4.5/min