GB 50735-2011 GB50735-2011铁合金工艺及设备设计规范:英文

NATIONALSTANDARD

OFTHEPEOPLESREPUBLICOFCHINA

CodeforDesinofFerroalloProcessandEuiment

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GB50735-2011

:

ChiefDevelomentDeartmentChinaMetalluricalConstructionAssociation

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:

ApprovalDepartmentMinistryofHousingandUrban-RuralDevelopment

ofthePeolesReublicofChina

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:,

ImplementationDateJune12012

ChinaPlanninPress

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Beijing2015图书在版编目()数据

CIP

铁合金工艺及设备设计规范:英文/中华人民共和国住房

GB50735-2011

和城乡建设部组织编译—北京:中国计划出版社,

.2015.12

ISBN978-7-5182-0289-8

……

中铁合金生产工艺技术规范中国

Ⅰ.①GⅡ.①Ⅲ.①----

英文铁合金设备设计规范中国英文

②----Ⅳ.①TF6-65

中国版本图书馆数据核字()第号

CIP2015284502

ChineseeditionfirstpublishedinthePeoplesRepublicofChinain2011

EnlisheditionfirstublishedinthePeolesReublicofChinain2015

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bChinaPlanninPress

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rd

,,

3FloorCTowerGuohongBuilding

,,

No.A11Muxidi-BeiliXichenDistrict

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,

Beiin100038

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,

PrintedinChinabyBeijingJinghuaHucaisPrintingCO.LTD

2011byMinistryofHousingandUrban-RuralDevelopmentof

thePeoplesRepublicofChina

Allrightsreserved.Nopartofthispublicationmaybereproducedortransmittedinanyformor

,,,,,,

byanymeansgraphicelectronicormechanicalincludingphotocopyingrecording

,

oranyinformationstorageandretrievalsystemswithoutwrittenpermissionofthepublisher.

,,,

Thisbookissoldsubjecttotheconditionthatitshallnotbywayoftradeorotherwisebelent

,

resoldhiredoutorotherwisecirculatedwithoutthepublisherspriorconsentinanyformof

blindinorcoverotherthanthatinwhichthisisublishedandwithoutasimilarcondition

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includinthisconditionbeinimosedonthesubseuenturchaser.

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ISBN978-7-5182-0289-8AnnouncementofMinistrofHousinandUrban-Rural

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DevelomentofthePeolesReublicofChina

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No.1218

NoticeonPromulationoftheNationalStandardof

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CodeorDesinoFerroalloProcessandEuiment

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bMinistrofHousinandUrban-RuralDeveloment

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,,

CodeforDesignofFerroalloyProcessandEquipmentnumberedGB50735-2011is

,,,

arovedasthenationalstandardanditwillbeimlementedfromJune12012.Inthisstandard

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,,,,,

clauses...7and6.0.8arecomulsorrovisionswhich

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mustbestrictlyenforced.

CodeorDesinoFerroalloProcessandEuimentisublishedandissuedbChina

fgfyqppy

PlanningPressundertheorganizationofStandardRatingResearchInstituteofStandardsand

NormsMinistrofHousinandUrban-RuralDeveloment.

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MinistryofHousingandUrban-RuralDevelopmentofthePeoplesRepublicofChina

,

December52011

Foreword

CodeorDesinoFerroalloProcessandEuimentisointleditedbSinosteel

fgfyqpjyy

,

EnineerinDesinandResearchInstituteCo.Ltd.inunctionwithrelevantsectorsinaccordance

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withrequirementsspecifiedinNoticeonissueofeditingandrevisingplanforengineering

(:[])

constructionstandardandcodein2009documentNo.JB200988issuedbMinistrof

yy

HousingandUrban-RuralDevelopment.

,,

Duringeditingprocessofthiscodethecodeteamcarefullystudiedrelevantnationallaws

,,,

reulationsoliciesandstandardscurrentlinforcecarriedoutinvestiationandresearcherformed

gpygp

,

necessaryspecificresearchandtechnicalargumentationsummedupthedesignexperiencesregarding

,,

ferroallorocessandeuimentintheastearswidelsolicitedcommentsfromrelevantroduction

ypqppyyp

designandequipmentmanufacturingsectorsanduniversitiesandcollegesandperformedrepeated

discussionandmodificationbeforefinalizingthetextsofthecodesubjecttoexamination.

,:,,

Thiscodeconsistsof6chatersnamelGeneralProvisionsTermsProcessandEuimentof

pyqp

,,,

PyrometallurgyProcessandEquipmentofMetallothermicsAuxiliaryFacilitiesSafetyand

EnvironmentalProtection.

Theclausesinboldinthiscodearemandatorywhichmustbeenforcedstrictly.

ThiscodeisplacedunderthemanagementofMinistryofHousingandUrban-Rural

,

DevelomentwhowillalsoberesonsiblefortheexlanationofmandatorclausesandSinosteel

pppy

,

EngineeringDesignandResearchInstituteCo.Ltd.isresponsibleforconcreteexplanationof

,

secifictechnicalitems.Inthecourseofimlementationofthiscodeifthereaearsancomment

ppppy

,,(:

orsuggestionpleasesendthemtoSinosteelEngineeringDesignandResearchCo.Ltd.address

,,,:;:)

No.8HaidianStreetHaidianDistrictBeijingpostalcode100080E-mailyuxin@

forthesakeofreferencedurinrevisioninfuture.

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,,

ChiefDevelopmentOrganizationParticipatingDevelopmentOrganizationsChiefDrafting

:

StaffandMainExaminersforthiscode

:

ChiefDevelomentOranization

pg

,

SinosteelEngineeringDesignandResearchInstituteCo.Ltd.

:

ParticiatinDevelomentOranizations

pgpg

MCCBERISEngineeringandResearchCorporation

,

SinosteelJilinFerroalloCo.Ltd.

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,

SinosteelJilinElectro-MechanicalEuimentCo.Ltd.

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:

ChiefDraftinStaff

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LiuYuminLiYutinGuoFeiuLiYanfenLiJin

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YuXinZhaoQilinZuXingyingWangGang

:

MainExaminers

GuoQiiaoJianXueeWuShenronCaoZhiianZhanZenchan

jggggqggg

YangZhizhongZhangFengGuoHongfaYaoQunHanZhongyue

ChanYuenQianQiin

ggygContents

()

……………

1GeneralProvisions1

…………………………()

2Terms2

…………………()

3ProcessandEquipmentofPyrometallurgy3

()

…………

3.1GeneralReuirements3

q

………………………()

3.2Process4

()

……………………

3.3Equipments8

…………………()

3.4RawMaterial10

……………()

3.5WorkshopLayout12

()

…………

3.6DustandSlaTreatmentandUtilization14

g

…………………()

4ProcessandEquipmentofMetallothermics15

()

…………

4.1GeneralRequirements15

………………………()

4.2Process15

……………………()

4.3Equipment16

()

…………………

4.4RawMaterial17

……………()

4.5WorkshopLayout18

()

…………………

4.6SlagTreatmentandUtilization19

……………()

5AuxiliarFacilities20

y

…………………()

5.1WaterSupply20

()

………

5.2PowerSulandAutomationInstrument21

ppy

……………()

5.3BuildingStructure21

()

…………

6SafetyandEnvironmentProtection23

…………()

ExlanationofWordininThisCode25

pg

…………()

ListofQuotedStandards26

:()

……………

AdditionExlanationofProvisions27

p

1GeneralProvisions

1.0.1Thiscodeisdrawnuforthesakeofexecutionofferroalloenineerinconstructionas

pygg

,,,

advancedtechnoloeconomicalandreasonablesafeandsuitableenersavinandenvironmental

gygyg

protection.

1.0.2Thiscodeissuitableforferroallorocessandeuimentenineerindesininnew

ypqpggg

,

projectmodificationprojectandexpansionproject.

,

1.0.3Besidesthiscodetheferroalloyprocessandequipmentengineeringdesignshallbealsoin

accordancewithstiulationsofrelevantnationalstandardscurrentlinforce.

py

··

12Terms

2.0.1Submeredarcfurnace

g

(),,

SubmeredarcfurnacehereinafterreferredtoasSAFalsocalledresistancefurnaceisa

g

typeoffurnacewhichisusedtoproduceferroalloybysmeltingorethroughreductionmethodusing

,

carbonreducinaentthrouhtheutilizationofarcheatandresistanceheatofmaterialandits

ggg

operationiscontinuous.

2.0.2Electrodeslipping

,

Durinsmeltinrocesstheelectrodewillbeslieddownwardwithcertainlenthatreular

ggpppgg

timeintervalsoraccordingtofurnaceconditionsconsideringelectrodelosssoastomaintain

oerationofelectrodeworkinendlenth.

pgg

2.0.3Electrodehoisting

Electrodewillbeentirelyhoistedthroughelectrodebrake.

2.0.4Self-bakedelectrode

Thelumpyelectrodepastewillbebakedintoanentiretylocallyinsideelectrodeshellutilizing

theresistanceheateneratedbelectriccurrent.

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2.0.5Metallothermics

Metallothermicsreferstoakindoftechnologicalprocessforproducingferroalloybyutilizing

heateneratedthrouhchemicalreactioninwhichmetalwithhiherchemicalactivitisusedfor

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reductionofanothertypeofoxide.

2.0.6Shakinladlerocess

gp

()

ThisprocessisusedforproducinglowcarbonandmediumcarbonferromanganeseFe-Mn

,

andsomeotheralloys.Theorefluxandliquidalloywhicharepreheatedarechargedintoshaking

,

ladleforshakinandthecharewillbemoltenbutilizinthesensibleheatandlatentheatofthe

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chargetoproducealloythroughreductionreaction.

··

23ProcessandEuimentofPrometallur

qpygy

3.1GeneralRequirements

,

3.1.1FerroalloSAFshallbeorientedatlarescaleclosedteandcomutercontrol.

ygypp

3.1.2Theequipmentandauxiliaryfacilitiesandutilitysystemselectedforeachprocessofthe

,

workshoshallbecomleteandthetechnoloicalrocessshallbesmooth.

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3.1.3Smeltingworkshopnewlydesignedshallfeatureimprovedmechanizationandautomation

levelandimrovedworkinconditions.

pg

,

3.1.4Practicalsafeandenergy-savingmechanicalequipmentshallbeselectedtobeeasyto

oerate.

p

3.1.5Auxiliaryfacilitiesshallbeequippedinunifiedform.

3.1.6Pressuretestshallbedonebeforeinstallationofhdraulicclindersforelectrode

yy

,

regulatingslippingandelectrodeholderandthehydrauliccylindersofthesametypewithsimilar

no-loadactionressureshallberouedtobeinstalledonthesameelectrode.Theverticaltolerance

pgp

/

shallnotexceed0.50mmm.

,

3.1.7Whileointintwosectionsofelectrodeshellsthetoandbottomoffinsshallbealined

jgpg

andconnected.Theverticaltoleranceofelectrodeshellfromtheendfaceofuerclaminbrake

pppg

shallnotexceed2‰ofthelenthofthiselectrodeshellsection.Whilecontinuousweldinis

gg

,

adotedtheweldseamatexternalsurfaceshallberoundsmoothafterweldin.

pgg

,

3.1.8Whileinstallingfumehoodorfurnaceroofitscentershallbecoincidenttothecenterof

,

SAFandthetoleranceofcoaxialitshallnotexceed5mm.

y

3.1.9Insulationinspectionshallbecarriedoutaftercompletionoffumehoodorfurnaceroof

,

installationandotherindividualcomonentsshallbeinsectedonebone.Theinsulation

ppy

,

resistanceshallnotbelowerthan1.50MΩandthetotalinsulationresistanceofentireassembly

shallnotbelowerthan0.15MΩ.Thereshallbenoarcstrikinwhiledetectintheround

ggg

insulationof3phaseelectrodebyusingelectricweldingmachine.

3.1.10Pressuretestistobecarriedoutaftercomressedairssteminstallationiscomleted.

pyp

,

Thetestpressureshallbe1.25timesoftheworkingpressureduringnormalworkingandthere

shallbenoleakinforsuccessivel30minutes.

gy

:

3.1.11Thecoolingwatersystemshallbeinaccordancewiththefollowingrequirements

1ItshallmeetcoolinreuirementsofeachcoolinositionofSAF.

gqgp

,

2Watersupplypressureshallbemaintainedat0.3MPa-0.5MPaandthewatersupply

headershallbeeuiedwithtemeratureandressuredetectiondevice.

qpppp

,

3Returnwaterbranchpipesmaybeequippedwithtemperatureandflowdetectionand

markinshallbemadeatreturnwaterflumeofeachreturnwaterie.

gpp

4Jointofeachcoolinwatersulieshallbeeuiedwithcomressedairconnector.

gppyppqppp

5Lengthofhoseshallmeetrequirementsofmax.strokeofelectrode.

,

6Afterielineinstallationiscomleteditshallbeflushedandshallbesubectto

pppj

hydrostatictest.

··

3,

3.1.12Thebusbarholderandtubeleadinintofumehoodshallbecooledwithsoftened

g

water.

,

3.1.13Forcoolinoftransformerasearatecoolinsstemshallbeforeseen.

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3.1.14Thecirculationrateofcoolingwatershallnotbelowerthan95%.

3.1.15Forcedcoolinmethodshallbeadotedforbottom.

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3.1.16Fumewasteheatandgasshallberecovered.

3.1.17FumeroducedfromSAFshallbecleanedbbafilter.

pyg

3.1.18Castingworkshopmustbeequippedwithfoundrycrane.

,

3.1.19Weldinmethodshallbeadotedforconnectionbetweenburn-throuhbusesandthe

gpg

surfaceshallbefreefromdirtandmetaloxide.

,

3.1.20Theeuimentwithstoraetimeexceedinoneearshallbedismantledcleanedand

qpggy

oiledbeforeinstallation.Therustingpipesandweldmentshallbesubjecttoderustingand

aintin.

pg

,,

3.1.21Hydraulicmediashallbekeptcleananditshallbefilteredatleastoncepermonthandreplaced

onceerear.Themediatemeratureshallbecontrolledwithintheraneof-20℃-+60℃.

pypg

3.2Process

3.2.1TheworkshopcompositionofSAFandrefiningfurnaceshallbeinaccordancewiththe

:

followingrequirements

,

1TheroductionsstemofSAFworkshoshallconsistsofroortioninstationsmeltin

pypppgg

(),,

workshopincludingtransformerroomandcontrolroomcastingworkshopfinishingworkshop

andslatreatmentsstem.

gy

2Theproductionsystemofrefiningfurnaceworkshopshallconsistsofproportioning

,(),

workshosmeltinworkshoincludintransformerroomandcontrolroomcastinworksho

pgpggp

andfinishingandcrushingworkshop.

:

3.2.2ThedailroductioncaacitofSAFshallbecalculatedbasedonthefollowinformula

yppyg

····/()

Q=PKKcosTW3.2.2

12

φ

:—(/)

WhereQSAFproductioncapacitytd.

—(·)

PRatedcaacitoftransformerkVA.

py

—,,

KUtilizationfactoroftransformerpowertaking0.95-1.00andtaking0.95for

1

·,

SAFwithcapacityover25000kVAandannualworkingdaystaking330d-

335d.

—,,

KFluctuationfactorofpowergridvoltagetaking0.95-1.00andtaking0.95for

2

·,

SAFwithcaacitover25000kVAandannualworkindastakin330d-

pygyg

335d.

—,

cosPowerfactortaking0.85-0.93aftercompensationatsecondaryside.

φ

—,

TDailroductiontimeofSAFtakin24h.

ypg

—(·/)

WSpecificpowerconsumptionkWht.

:

3.2.3CaacitofSAFtransformeriscalculatedbasedonthefollowinformula

pyg

·

QW

()

P=3.2.3

·

24TcosϕKK

12

:—(·)

WhereRequiredratedcapacityoftransformerkVA.

ρ

··

4—(/)

QReuiredannualroductionta.

qp

—,

KUtilizationfactoroftransformerowertakin0.95-1.00.

1pg

—,

KFluctuationfactorofowerridvoltaetakin0.95-1.00.

2pggg

—,

cosPowerfactortakin0.85-0.93aftercomensationatsecondarside.

gpy

φ

—(·/)

WSpecificproductpowerconsumptionkWht.

—,

TAnnualworkindasofSAFtakin330d-335d.

gyg

3.2.4Annualproductioncapacityofrefiningfurnaceshallbecalculatedbasedonthefollowing

:

formula

·/()

Q=1440GNT3.2.4

:—()

WhereQAnnualroductioncaacitt.

ppy

—()

GOututertaint.

ppppg

—()

NAnnualworkindasd.

gy

—()

TFurnacesmeltintimemin.

g

,

3.2.5ThetransformerofSAFshouldadopthighgridvoltagelowimpedanceandonloadvoltage

reulation.

g

,

3.2.6TheannualworkingdaysofSAFshallnotbelessthan330dandtheannualworkingdays

ofrefininfurnaceshallnotbelessthan300d.

g

,

3.2.7Theproportioningelectrodecontrolanddedustingsystemshalladoptprogramcontrolor

distributedcontrol.

,

3.2.8Incasecomuterroortioninisadoteddifferentrawmaterialsshallbelaidonbelt

pppgp

conveorblaers.Theweihterrorshallbecontrolledwithin1%andtheerrorbetween

yyyg

recedinandfollowinbatchesshallbecomensated.

pggp

3.2.9Insidediameteroffeedingtubeoflumpymaterialshallnotbesmallerthan3timesofmax.

,

materialdiameterandshallnotbesmallerthan350mm.Theanlebetweentubeandhorizonshall

g

notbesmallerthan50°.

3.2.10Theelectrodecrosssectioncurrentdensitforsmeltindifferentroductsshallbe

ygp

:

determinedinaccordancewiththefollowingstipulations

22

()://

1ForferrosiliconFe-Si5.50Acm-6.00Acm.

22

://

2ForCa-Sialloy7.00Acm-8.00Acm.

():

3ForhihcarbonferromananeseFe-MnorSi-Mnallowithsemi-closedorclosedSAF

ggy

22

//

5.80Acm-7.00Acm.

22

()://

4ForhihcarbonferrochromiumFe-CrorCr-Siallo6.00Acm-6.50Acm.

gy

2

/

3.2.11Currentdensityofconductingcoppertubeshouldbe3Amm.

3.2.12Theelectrodesliinshalladotrorammedcontrolandfreuentandlesssliinshall

ppgppgqppg

beadopted.Theslippinglengthforeachtimeshallnotbeover25mm.Theelectrodeslippingtime

,

andsliinlenthshallberecorded.Incaseofre-startaftershutdownsliinisnotallowed

ppggppg

beforetheelectrodepowerisrestoredtothefullload.

,,

3.2.13Forelectrodehoistincoercontactshoesmustbereleasedfirstandoerationwithower

gpppp

onisstrictlyforbidden.

,

3.2.14TheroofofclosedSAFshallbeeuiedwiththermometerressureaueandanti-

qpppgg

,

exlosionholeandfumeductshallbeeuiedwithhdroenmeasurininstrumentandalarm

pqppygg

device.EachoperationplatformshallbeequippedwithCOdetectorandalarmdevice.

··

5,

3.2.15TheressureinsideclosedSAFshallbecontrolledat±20Paandthehdroencontentin

pyg

furnaceshallbelowerthan2%.

3.2.16TheoxygencontentinclosedSAFshallbelowerthan2%.

3.2.17Thebottomshallbeeuiedwithtemeraturemeasurinointswithnumbernotless

qpppgp

,

than3andthemeasuringrangeshallbecontrolledwithinrangeof0-900℃.

(),

3.2.18ForroductionofmediumandlowcarbonferromananeseFe-MnEAFmetal

pg

,(),

mananeseandmediumlowandextralowcarbonferrochromiumFe-Crhotcharinandhot

ggg

pouringprocessshallbeadopted.

3.2.19Thehotmetalranulatinshallberovidedwithbuffermould.

ggp

,

3.2.20WhenSAFwithrotarybodyisselecteditshallbeinaccordancewiththefollowing

:

requirements

,

1Whenvariablefreuencmotorisadoteditshallbecaableofrotatinb360°around

qyppgy

verticalaxisorreciprocatingby120°.

2Itshouldadotdrivewithhihseedreductionratioadotineardrivelusinear

pgppggppg

drive.

3Therotarydrivedeviceshouldbearrangedbelow0.00m.

3.2.21DifferentlininofSAFandrefininfurnaceshallbeselectedaccordintoreuirementsof

gggq

,

differentsmeltingproductsandslagalkalinity.Incaseslagalkalinityishigherthan1.0magnesium

;,

orcarbonlininshouldbeadotedincaseslaalkalinitislowerthan1.0carbonlininshouldbe

gpgyg

adopted.

3.2.22HotmetalproducedfromlargeferroalloySAFshouldbecastwithcastingmachine.

3.2.23TheowerconsumtionandrawmaterialconsumtionformainroductsofSAFshallbe

pppp

inaccordancewithrequirementsspecifiedinTable3.2.23.

3.2.24Theelementrecoverrateforsmeltindifferentroductsshallbeinaccordancewith

ygp

requirementsspecifiedinTable3.2.24.

··

6

··

7

Table3.2.23Powerconsumtionandrawmaterialconsumtionindexforroduct

ppp

PowerGranulated

IndexCarbon

/

consumptionQuartzScrapscaleMnoreMnrichslagDolomiteLimeChromeorecarbon

reductionRemarks

(/)(/)(/)(/)(/)(/)(/)

forsmeltingkgtkgtkgtkgtkgtkgtkgtferrochrome

(/)

Descriptionagentkgt

(·/)(/)

kWhtkt

g

/

75%Fe-Si850019001000230330-------

Orecontaining

HighcarbonFe-Mn2600-500-3000--500--

Mn38%

Orecontaining

HighcarbonFe-Cr3200100400-----1900-

Cr2O340%

MncontentOrecontaining

Si-Mnallo4200300550-2000100---

y

:

36%800Mn34%

Cr-Sialloy480095043060---10-560-

:

PureFe-Si1100020001000Scale306-------

:

Coke1100ContainingCa28%

Ca-Siallo110002000----1000--

y

:

Charcoal170ContainingSi60%

—

MediumandSi-Mn

()

580hotchare---1600-1---OrecontaininMn36%

gg

:

lowcarbonFe-Mnalloy1050

:

HihSiFluoriteMnrichsla

gg

EAFmetalMn1750---1800-2000-

:

Si-Mn650180containingMn45%

Mediumand

:

1800------14001500Cr-Sialloy620-

lowcarbonFe-Cr

:

Coke450Mncontent

HighsiliconSi-Mn6000700---60---

::

Charcoal55045%1700

书书书Table3.2.24Elementrecoverratefordifferentroducts

yp

()

ProductElementrecoveryrate%Remarks

75%ferrosiliconSi≥92-

IndustrialsiliconSi≥85-

()

EAFferromananeseFe-MnMn≥78-

g

Si-MnalloMn≥82-

y

()

HihcarbonferrochromiumFe-CrCr≥92-

g

Cr-SialloyCr≥94-

()

MediumandlowcarbonferromanganeseFe-MnMn≥80-

EAFmetalmanganeseMn≥83-

()

MediumandlowcarbonferrochromiumFe-CrCr≥80-

,,

Ca-SialloySi≥65Ca≥35Ca28Si60

()

BFferromananeseFe-MnMn≥82-

g

3.3Equipments

3.3.1Newl-builtferroallolantshallselectreasonablecaacitandteofelectricarc

yyppyyp

()·

furnaceEAFaccordintoroductandscale.ThecaacitofSAFshouldbeover25000kV

gppy

,

A.Shortfumehoodisadoptedforthefurnacerequiringtappingholeoperationandclosedtype

furnaceshouldbeadotedforothertesofroduct.Thecaacitofrefininfurnaceshouldbe

pypppyg

·

over3500kVA.

3.3.2TypeselectionofmainequipmentofSAFworkshopshallincludefurnacecapacityand

,,,,

teowersulmodeoftransformerelectrodesstemelectricalcontrolmodehdraulic

yppppyyy

,,,

systemcoolingwatersystemrawmaterialandproportioningandloadingequipmentfurnacetop

,,

charineuimenttaineuimentandcastineuimentetc.

ggqpppgqpgqp

3.3.3Teselectionofmaineuimentofrefininfurnaceworkshoshallincludefurnace

ypqpgp

,,,,,

transformerfurnaceequipmentmaterialfeedingequipmenthotchargingequipmentshakingladle

,

taineuimentandcastineuimentetc.

ppgqpgqp

3.3.4Theclearanceheihtofclosedfurnaceroofshallnotbesmallerthan1.10timesofits

g

electrodediameter.

3.3.5Thefumehoodheihtandfurnacedooroeninsizeofsemi-closedEAFshallbein

gpg

:

accordancewiththefollowingrequirements

1Itshallbecaableofstorininstantaneouseakfumeflow.

pgp

2Itshallbecaableofullinoutelectrodeincaseofelectrodebreakae.

ppgg

3Itshallmeetrequirementsofchargingstokingmachineoperation.

:

3.3.6TheEAFbusbarshallbeinaccordancewiththefollowinreuirements

gq

1Sectionsizeandcurrentcarryingcapacityofbusbarshallbeselectedaccordingtocurrent

··

8,

densitanditshallbecaableofshorttimeoverload.Thecurrentdensitofbusbarshouldbe

ypy

22

//

controlledat3Amm-4Amm.

2Itshallfeatureerfectroundinsulationerformance.

pgp

3Itshallhaveoodmechanicalstrenth.

gg

4Thebusbarhangerandwalltubeshallbemadeofmagneticisolatingmaterialandshallbe

insulated.

,

5Busbarresistanceanditselfinductivereactanceshallbereducedandthe3-phase

imedanceunbalanceshallbelowerthan5%.

p

3.3.7ThebusbaratlowvoltagesideofSAFshalladoptwatercooledcoppertubeandwater

cooledcableintermsofitsstructurete.

yp

3.3.8Theintensityofpressurebetweenelectrodeandcoppercontactshoesshallbecontrolledat

0.09MPa-0.12MPa.

,

3.3.9CoercontactshoesoflareEAFshallbeforedandmaterialwithcoercontentover

ppggpp

,

99.5%shallbeusedanditsthicknessshallnotbesmallerthan70mm.

3.3.10Thecontactelementandsliinunitoffin-teholdershallbeinterchaneable.

ppgypg

,

3.3.11Theinnersurfaceofcoppercontactshoesshallbemachinedingroupandgoodcontact

surfacewithelectrodeshallbeuaranteed.

g

/,/

3.3.12TheelectroderegulatingspeedofSAFshallbecontrolledat0.50mminand0.40mm

/

min-1.50mminforrefininfurnace.

g

3.3.13Thetopandbottomclampingbrakesofelectrodeshallbeinterlocked.

3.3.14Sliinlenthofelectrodeshallbecaableoffreeadustmentwithin0-100mm.

ppggpj

3.3.15Theliftingpositiondetectiondeviceofelectrodeshallbecomposedofelectrodeposition

indicatorandsecondardislainstrument.

ypy

3.3.16ThewatercooledframeworkandwatercooledcoverplateofEAFfumehoodandroof

shallbesubecttohdrostatictestandwaterassintestaftercomletionofmanufacturin.The

jypgpg

,,

testressureshallbe0.6MPawithdurationof30minwithoutleakinandeachwaterassae

pgpg

shallbesmooth.

3.3.17Thewatercooledcoverlateclosetowatercooledframeworkofroofandfumehoodand

p

aroundelectrodeshallbemadeofanti-magneticstainlesssteelmaterial.Coatedorprecastfire

,

resistanceconcretematerialshallbealiedunderwatercooledcoverlateforheatinsulationand

ppp

itsthicknessshallnotbesmallerthan50mm.

,

3.3.18Perfectsealinshallbeformedbetweenfumehoodroofandholderandtube.

g

3.3.19Connectionbetweenconductingcoppertubeandcoppercontactshoesshalladoptpressed

,

fittinstructurewithtaersocketandthewallthicknessofcoertubeshallnotbesmallerthan

gppp

10mm.

,

3.3.20Conductintubeshouldbemadeuoftwosectionswithonesectionconnectedwith

gp

watercooledcableandtheothersectionconnectedwithcoppercontactshoes.Weldingshallbe

,

adotedbetweentwosectionsandtheaatconnectionshallbeweldedwith307silver-coer

pgppp

weldinrodforointfillin.

gjg

:

3.3.21Thehydraulicsystemshallbeinaccordancewiththefollowingrequirements

,

1Hdraulicowerunitaccumulatorandhdraulicielineshallbeeuiedwithressure

ypyppqppp

,/

valveandshut-offvalveandemergencyopeningclosingdeviceshallbeequippedbetween

··

9accumulatorandoilieline.

pp

,,

2Whileinstallinhihressurehoseitshallmeetmax.strokereuirementofelectrodeand

ggpq

torsionisnotallowed.

3Theventvalveshallbeinstalledathihestointofielinesstem.

gpppy

4Thepaintingofhydraulicsystemshallbeinaccordancewithrelevantstipulationsspecified

,

incurrentnationalstandardGB7231Basicidentiicationcoloridentiicationsmbolandsaet

ffyfy

markinoindustrialieline.

gfpp

5Theinstallationofhydraulicsystemshallbeinaccordancewithrelevantstipulations

secifiedincurrentindustrialstandardYBJ207Codeorconstructionandaccetanceo

pfpf

,

metallurgicalmechanicalequipmentinstallation-hydraulicpneumaticandlubricationsystem.

6Themediaofhydraulicsystemshouldadoptwater-glycol.

7ThehdraulicsstemofEAFshallbesubecttoressuretestafterinstallationis

yyjp

,,

completedandthetestpressureshallbe120%ofworkingpressurewithdurationof15min-

20minwithoutleakin.

g

3.3.22Theelementsofpressureringholdershallnotuseflammablemedia.

,

3.3.23Incaseofpowerfailuretheaccumulatorshallbecapableofhoistingelectrodetoacertain

heiht.

g

3.4RawMaterial

:

3.4.1Rawmaterialshallbeinaccordancewiththefollowingrequirements

,

1Thechargegradeshallmeetrequirementsforsmeltingdifferentproductsandmixingof

earthanddirtisnotallowed.

2Thechemicalcompositionsshallbeconsistent.

,

3PretreatmentisreuiredfortherawmaterialforlareEAFandthemoistureofmainraw

qg

materialschargedshallbelowerthan5%.

4CarbonreducingagentshallbeselectedaccordingtoEAFcapacityandsmeltingproduct.

5Quartzshallbeofoodthermalstabilitanderfectanti-exlosionroert.

gyppppy

:

3.4.2Theferrousmaterialshallbeinaccordancewiththefollowingrequirements

,

1Steelscrashallbeofcarbonmaterialanditshallbeclean.TheFecontentshallbehiher

pg

,,,

than95%withoutnon-ferrousmetaliscraoroilcontaminationandthecharinlenthshall

pgpggg

belessthan100mm.

,

2TheTFecontentofscaleshallnotbelowerthan65%andtherainsizeshouldbe3mm-

g

5mm.

,

3TheTFecontentofironoreelletshallbehiherthan65%andsulfurcontentshallbe

pg

lowerthan0.01%andrainsizeshouldbe8mm-30mm.

g

,,

3.4.3Rawmaterialsshallbecrushedscreeneddriedorsinteredandpelletizedaspretreatment

,

accordintosmeltintechnicalconditionsandtherawmaterialsfedtoroortioninstationshall

ggppg

bequalifiedones.

,

3.4.4Forsmeltinofrefinedallothemineralshallbefreefromcarbonmaterialimurit.

gypy

3.4.5Thecomositionsofactivelimeshallbeinaccordancewithrelevantreuirementsof

pq

/

currentindustrialstandardYBT042Metalluricallime.

g

3.4.6OreandfluxshallbeinaccordancewithreuirementssecifiedinTable3.4.6.

qp

··

10

··

11

Table3.4.6Maintechnicalconditionsoforeandflux

()

Chemicalcompositions%

Grainsize

Type

()

mm

/

//

SiO2CaOCaCO3MnMnFeCr2O3Cr2O3FeOT.FeAl2O3PMnSP

,

20-120those

Quartz≥98------≤0.05≤1.00--≤0.02smallerthan20

isnotover5%

Mnore---≥32≥5----≤0.002--10-80

Mnrichslag---≥28---≤3---≤0.0210-60

Chromeore-----≥40≥3-----10-80

Limestone--≥95-------≤0.1-20-80

Lime-≥85--------≤0.1≤0.0220-80

MgCO

3

Dolomite-≥50----≤1.20≤0.85---20-80

>40

书书书3.4.7ThecarbonreducinaentshallbeaserreuirementssecifiedinTable3.4.7.

ggpqp

Table3.4.7Maintechnicalconditionsofcarbonreducinaent

gg

()

Chemicalcompositions%

Resistivitat

y

Grainsize

Typenormaltemperature

()

mm

FixedcarbonVolatilematterAshcontentSulfur

(·)

sm

,

5-40those<5

Metalluricalcoke>82<2<15<0.60>2000

g

notover5%

Semi-cokeor

>822-4<10<0.60>25005-35

gascoalcoke

Petroleumcoke90-955-100.