LF炉温度控制曲线Word下载.docx
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LF炉温度控制曲线Word下载.docx
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0.5%)。
Powertransmission,addingalloymaterial,Sisstill
15neededtobeaddedin0.5~1%slag,theslagofuniform,withareductantbatchaddition,sprinkle,toensurethatthefurnacesubmergedarcslag,slag
(FeO<
0.5%).
g.渣白,停电,测温取样。
0.5Slagwhite,poweroff,temperaturemeasuringandsampling.
h.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)。
4Accordingtothetemperatureofthemoltensteel,adjustthevoltage,current,withareducingagenttomaintainwhiteslag(heatpreservationandthelike).
i.
测温,取样
Temperaturemeasurement,sampling
j.
[S]进入规格,微调成份,停电提升电极、炉盖
[S]intothespecification,fine-tuningingredients,poweroffascensionelectrode,thefurnacecover
5
k.
钢包车开出、喂丝软吹(不裸露钢液)
Ladlecarout,threadfeedingsoftblow(notbare
8
steelliquid)
l.
吊包至后处理工位。
Cranepacketstopost-processingwork
station.
小计
Total
40
Ladle
NoserviceRem.Itemtimearks(min)
m.电炉出钢、初炼钢水兑入精炼钢包、粗合金化、加保护渣
Electricarcfurnacetapping,initialsmeltingmoltensteelmixrefiningladle,blendedcrudealloying,plusprotectiveslag.
servicetime
n.
o.
钢包车载包运行至加热工位
Ladlecarpackageruntotheheatingstation.
p.
水冷炉盖下降到位,送电加热,补加渣料0.5~1%。
Watercooledfurnacelidfallinplace,tosendelectric
heating,addingslag0.5~1%.
q.
停电、测温取样
Poweroff,temperaturemeasuringandsampling
r.
送电、补加合金料,S高时仍需补加0.5~1%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(FeO<
15
Powertransmission,addingalloymaterial,ifSishigh,stillneededtobeaddedin0.5~1%slag,theslagofuniform,withareductantbatchaddition,sprinkle,toensurethatthefurnacesubmergedarcslag,slag(FeO<
s.
渣白,停电,测温取样。
Slagwhite,poweroff,temperaturemeasuringandsampling.
t.
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)。
4
Accordingtothetemperatureofthemoltensteel,adjustthevoltage,current,withareducingagentto
maintainwhiteslag(heatpreservationandthelike).
u.
v.
[S]进入规格,微调成份,停电提升电极、炉盖
[S]intothespecification,fine-tuningingredients,
powerofftoascensionelectrode,thefurnace
cover.
w.
x.
Cranepacketstopost-processingworkstation.
三.LF-90t精炼炉工艺操作描述
Third.LF-90tFinerfurnaceprocessoperationdescription
1LF炉精炼阶段
1LFFurnacerefiningstage
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,3~4min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。
Arcfurnacetapping,accordingtotheproductionprocesstoidentifyrefiningsteelwaterloading,throughsmeltingcastingcranepacketspacketstocross90tLFfurnacesteelcar,artificialtracheaonargonladlecarpackage,runningtotheheatingstation(positioningaccuracyof5mm),water-coolingfurnacecoversealingladledrop,three-phaseelectrodedecreases,sendelectricheating.Transmissionprocessusingnormalargonblowingargonstirringvolume,byaddingslagmaterialfeedingsystem.Theheatbalanceofpowertransmission,initialtemperatureofmoltensteelcontinuedtodecline,3~4minbegantoheatup.Refiningperiodisreducedbyaddingreducingagent,batchaddition,littlebatch,batchsprinkle.Atthesametimesampleswillbesenttothelaboratoryforrapidanalysisspeed.
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。
Accordingtotheanalysisofvalueandthedifferencebetweenthesteeltargetvalue,calculatestheneedtojointhealloytypeandmaterialquality,inthespecifiedtimewillbestipulatedandquantityofalloymaterialbyweightingsenttoLFfurnacehopper,startedreceivinghoppergate,alloymaterialcanbeaddedtosteel,alloyadjustmentpurposes.Secondphase
powertransmissionreductionaftertheblackout,temperaturemeasurement,sampling,alloycompositionintothesteelspecifications,andthenadjustthevoltage,currentinsulation,temperaturemeasurement,temperaturereachestherequest,CaSiwirefeeding,endoff[O],and[S],tochangetheoxide,sulfidemorphologyanddistribution.Wirefeedingspeedinwirefeedingmachineaccordingtotherequirementofprocesssetting,wirefeedingmachinecontrolcabinetisprovidedwithadisplayoffeedinglengthcounterandaspeedcontroller,atcertainspeedtojointoapredeterminedlengthwillautomaticallystopfeeding,thisstagebyusingasmalleramountof"
softblowingargonblowing"
.[S]intothespecifications,accordingtotheneedtofine-tunetheindividualalloyingelements,orelectrode,mentionsthewater-coolingfurnacecover.
2开出加热工位至后处理工序阶段
2Opentheheatingstationtopost-treatmentprocessstages
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。
Buggyladlemoveoutofheatingstationtopostprocessingprocess,thusacompleteLFfurnacesmeltingcycle.
四.主要技术参数
Fourth.Maintechnicalparameters
序号
名称
数值
备注
S.N.
Name
Numerical
Note
1
额定容量
80t
Ratedcapacity
平均钢水容量
Averagemoltensteelcapacity80t
70t
精炼最小钢水容量70t
Minimumcapacityofrefiningmoltensteel
Themaximumcapacityofmoltensteel
90t
2
钢包
包壳上口直径
Φ3200mm
Shellopeningdiameter
自由空间高度
800mm
Freespaceheight
3
钢包车
Buggyladle
最大承载
200t
Maximumload
行走速度
2-25m/min
(可调)
Walkingspeed
(adjustable)
驱动方式
机械式,电机-减速器
Drivemode
Mechanicaltype,motorreducer
轨道中心距
3500mm
Centerdistanceofthetrack3500mm
调速方式变频调速
Speedcontrolmode
Variablefrequencyspeedregulation
停车定位精度±
5mm
Parkingpositioningaccuracy±
4电极升降装置
4Electrodeliftingdevices
电极直径Φ450mm高功率电极
ElectrodediameterΦ450mmHighpowerelectrode
电极分布园Φ740mm
ElectrodedistributiongardenΦ740mm
电极最大行程2800mm
Electrodebiggesttravel2800mm
电极升降速度
Electrodeliftingspeed
自动
5/3.6m/min
上升/下降
Auto
up/down
手动:
6/4.5m/min
Manual
6/4.5m/min
up/down
5短网
5Shortnet
阻抗绝对值
2.4mΩ
Impedanceabsolutevalue2.4mΩ
三相阻抗不平衡
≤4%(静态)
Three-phaseimpedanceimbalance
≤4%(Static)
Water-cooledcable4200mm2Atotalofsixroots,perphasetwo
6
水冷炉盖
密排管式水冷炉盖,附集烟罩
6Watercooledfurnacelidfurnacecover,withasmokecover
Denserowofpipetypewater-cooling
烟气排放量
200000Nm3/h(混风后烟气温度<
500℃)
Fluegasemissions
200000Nm3/hThefluegas
temperaturemixedwithwindis
lessthan500℃
7
桥架及炉盖提升装置
Bridgeshelfandfurnacecoverascensiondevice
提升高度
400mm
liftheight
提升方式
液压缸+重载板式链
Thewaytoimprove
Hydrauliccylinder+heavyplatechain
升降速度
30~40mm/s
Liftingspeed
电极接长站
Electrodejoinslongstanding
规格
Ф450mm
Specifications
工作方式
Modeofoperation
电极自重夹紧(手动操作)
Electrodeself-respectclamping(manual)
9氩气系统
9Argonsystem
氩气供气压力
1.6MPa(氩气汇流排入口压力)
Argongassupplypressureinletpressure)
1.6MPa(argonconverge-wires
氩气工作压力0.20.8MPa(钢包入口压力)
Argonworkpressure0.20.8MPa(Ladleinletpressure)
氩气耗量
Argonconsumption
最大
600Nl/min
Maximum
通常
50~150Nl/min
Usual
50~150Nl/min
事故状态氩气压力
1.6MPa
Inaccidentstateargongas
pressure1.6MPa
10压缩空气系统(动力用气)
10Compressedairsystem(usegas)
压力
≥0.4MPa
Pressure
≥0.4MPa
耗量
10Nm3/h
Consumption
10Nm3/h
11LF炉冷却水装置
11LFFurnacecoolingwaterunit
进水温度
≤3℃5
Inletwatertemperature
≤35℃
回水温度
≤5℃5
Returnwatertemperature≤55℃
进水压力
0.3~0.5MPa
无压回水
Inletwaterpressure0.3~
0.5MPaNopressurereturnwater
耗量:
130m3/h
Consumption:
Watercoolingfurnacecover
130m3/hNo
pressurereturnwater
设备本体耗量
120m3/h
Equipmentontologyconsumption
120m3/h
Nopressurereturn
water
变压器冷却水
40m3/h
Transformercoolingwater
40m3/hNopressurereturnwater
液压站冷却水
10m3/h
Hydraulicpressurestationcoolingwater
10m3/hNopressure
returnwater
事故应急水
100m3/h
0.2MPa,持续30min
Accidentemergencywater100m3/h0.2MPa,continue30min
12液压系统
12Hydraulicsystem
Workpressure
12MPa
工作介质
水-乙二醇
Workingmedium
water-glycol
13
精炼炉变压器
Finerfurnacetransformer
16000kVA可长期过载
20%
16000kVAallowlong-termoverload20%
一次
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