LF炉温度控制曲线Word文档格式.docx

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LF炉温度控制曲线Word文档格式.docx

Steelcarrunningtocraneladlewirefeedingstation

Artuberemoved,drivingcranepacketstopost-treatmentprocedure

2作业周期(min)

2Operationcycle(min)

No.

Item

Ladleservicetime(min)

Remarks

a.

电炉出钢、初炼钢水兑入精炼钢包、粗合金化、加保护渣

Electricarcfurnacetapping,initialsmeltingmoltensteelrefiningladle,blendedcrudealloying,plusprotectiveslag

b.

0.5

c.

钢包车载包运行至加热工位

Ladlecarpackageruntotheheatingstation

d.

水冷炉盖下降到位,送电加热,补加渣料0.5~1%。

Watercooledfurnacelidfallinplace,tosendelectricheating,addingslag0.5~1%.

5

e.

停电、测温取样

Poweroff,temperaturemeasuringandsampling

f.

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<

0.5%)。

Powertransmission,addingalloymaterial,Sisstillneededtobeaddedin0.5~1%slag,theslagofuniform,withareductantbatchaddition,sprinkle,toensurethatthefurnacesubmergedarcslag,slag(FeO<

0.5%).

15

g.

渣白,停电,测温取样。

Slagwhite,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)。

Accordingtothetemperatureofthemoltensteel,adjustthevoltage,current,withareducingagenttomaintainwhiteslag(heatpreservationandthelike).

4

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

k.

钢包车开出、喂丝软吹(不裸露钢液)

Ladlecarout,threadfeedingsoftblow(notbaresteelliquid)

8

l.

吊包至后处理工位。

Cranepacketstopost-processingworkstation.

小计

Total

40

m.

Electricarcfurnacetapping,initialsmeltingmoltensteelmixrefiningladle,blendedcrudealloying,plusprotectiveslag.

n.

o.

Ladlecarpackageruntotheheatingstation.

p.

Watercooledfurnacelidfallinplace,tosendelectricheating,addingslag0.5~1%.

q.

r.

Powertransmission,addingalloymaterial,ifSishigh,stillneededtobeaddedin0.5~1%slag,theslagofuniform,withareductantbatchaddition,sprinkle,toensurethatthefurnacesubmergedarcslag,slag(FeO<

s.

t.

u.

v.

[S]intothespecification,fine-tuningingredients,powerofftoascensionelectrode,thefurnacecover.

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.Secondphasepowertransmissionreductionaftertheblackout,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.NameNumericalNote

1额定容量80t

Ratedcapacity80t

平均钢水容量80t

Averagemoltensteelcapacity80t

精炼最小钢水容量70t

Minimumcapacityofrefiningmoltensteel70t

最大钢水容量90t

Themaximumcapacityofmoltensteel90t

2钢包

2Ladle

包壳上口直径Φ3200mm

ShellopeningdiameterΦ3200mm

自由空间高度800mm

Freespaceheight800mm

3钢包车

3Buggyladle

最大承载200t

Maximumload200t

行走速度2-25m/min(可调)

Walkingspeed2-25m/min(adjustable)

驱动方式机械式,电机-减速器

DrivemodeMechanicaltype,motorreducer

轨道中心距3500mm

Centerdistanceofthetrack3500mm

调速方式变频调速

SpeedcontrolmodeVariablefrequencyspeedregulation

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

Auto5/3.6m/minup/down

手动:

6/4.5m/min上升/下降

Manual6/4.5m/minup/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)

水冷电缆4200mm2共六根每相两根

Water-cooledcable4200mm2Atotalofsixroots,perphasetwo

6水冷炉盖密排管式水冷炉盖,附集烟罩

6WatercooledfurnacelidDenserowofpipetypewater-coolingfurnacecover,withasmokecover

烟气排放量200000Nm3/h(混风后烟气温度<

500℃)

Fluegasemissions200000Nm3/hThefluegastemperaturemixedwithwindislessthan500℃

7桥架及炉盖提升装置

7Bridgeshelfandfurnacecoverascensiondevice

提升高度400mm

liftheight400mm

提升方式液压缸+重载板式链

ThewaytoimproveHydrauliccylinder+heavyplatechain

升降速度30~40mm/s

Liftingspeed30~40mm/s

8电极接长站

8Electrodejoinslongstanding

规格Ф450mm

SpecificationsФ450mm

工作方式电极自重夹紧(手动操作)

ModeofoperationElectrodeself-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)

Argongassupplypressure1.6MPa(argonconverge-wiresinletpressure)

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

Maximum600Nl/min

通常50~150Nl/min

Usual50~150Nl/min

事故状态氩气压力1.6MPa

Inaccidentstateargongaspressure1.6MPa

10压缩空气系统(动力用气)

10Compressedairsystem(usegas)

压力≥0.4MPa

Pressure≥0.4MPa

耗量10Nm3/h

Consumption10Nm3/h

11LF炉冷却水装置

11LFFurnacecoolingwaterunit

进水温度≤35℃

Inletwatertemperature≤35℃

回水温度≤55℃

Returnwatertemperature≤55℃

进水压力0.3~0.5MPa无压回水

Inletwaterpressure0.3~0.5MPaNopressurereturnwater

耗量:

水冷炉盖130m3/h无压回水Consumption:

Watercoolingfurnacecover130m3/hNopressurereturnwater

设备本体耗量120m3/h无压回水

Equipmentontologyconsumption120m3/hNopressurereturnwater

变压器冷却水40m3/h无压回水

Transformercoolingwater40m3/hNopressurereturnwater

液压站冷却水10m3/h无压回水

Hydraulicpressurestationcoolingwater10m3/hNopressurereturnwater

事故应急水100m3/h0.2MPa,持续30min

Accidentemergencywater100m3/h0.2MPa,continue30min

12液压系统

12Hydraulicsystem

工作压力12MPa

Workpressure12MPa

工作介质水-乙二醇

Workingmediumwater-glycol

13精炼炉变压器

13Finerfurnacetransformer

额定容量16000kVA可长期过载20%

Ratedcapacity16000kVAallowlong-termoverload20%

一次电压35kV

Primaryvoltage35kV

二次电压330~280~190V

Secondaryvoltage330~280~190V

1

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