1.comparedwithmediumfrequencyfurnace awiderangeof1.uses 1.1mediumfrequencyfurnacecanonlybeusedforthesmeltingofferromagneticmaterials，suchassteelandiron.electricarcfurnacecansmeltallmaterials，
includingconductiveferromagneticmaterialsandnon-conductivematerials，suchasvariousores，
washingiron，scrapsteel，slagiron，non-ferrousmetalsandsoon.
1.2thesametonnageofthesamematerial，suchasthesmeltingofsteel，theuseofdcelectricarcfurnacethantheuseofthemediumfrequencyfurnacetosaveelectricity.
thereasonisthatthedcarcfurnacesavesthelossoftheinverterthyristorandtherelevantwaterjacket，thecompensationcapacitorgroupandthefurnaceinductionringcompared
withtheintermediatefrequencyfurnace. thecapacityof1.3dcelectricarcfurnacecanbedoneverymuch，anditisverycommononhundredsoftons.themediumfrequencyfurnaceisrarelyabletoexceedtentons. 1.4refractorymaterialavailablecorundumrefractorybrickandrammingmaterialandcanbeverythick，goodinsulationeffect，(iffurnacecannotdoso)reduceheatlossalsocanachievetheeffectofsavingenergy. 1.5reducedcountlesstimesofrepeatedbeating，ovenandsintering!itcanavoidalotofwasteoftime. 1.6thenoiseisverylow.intheprocessofproduction，thereisnonoiseinthemiddlefrequency，whichmakestheemployees'physicalandmentalhealthfromthenoise. 1.7oxygendecarburizationdesulfurizationanddephosphorization!themediumfrequencyfurnaceis
powerless. the1.8dcarcfurnacehashighsmeltingtemperature，upto2thousanddegrees，andhasastirringeffect. 1.9reducetheamountofcoolingwater.duetotheabsenceoftheinductioncoilofthefurnacehead，thecoolingwaterconsumptionisgreatlysaved!reducethecoolingtowercapacity! 1.10thefailurerateislow.therearenosensitiveandvulnerableelementsonthemediumfrequencyfurnace
(invertthyristor，waterjacket，pulsetransformer，capacitorbank，etc.).)sothatthefailurerateisverylow，verysturdyanddurable. two.comparedwiththeacarcfurnace: 1.dcarcfurnacessave2setsofelectrodedevicesthanalternatingcurrentarcfurnaces becausetheacarcfurnaceusesathree-phasepowersupply，3graphiteelectrodesareneeded.andthedcarcfurnaceonlyuses1graphiteelectrodes. theconsumptionof2.graphiteelectrodescanbesavedby30%to50%. the3.furnacewallrefractorieshavelongservicelife. thearcofacelectricarcfurnaceisgeneratedbetweenthreephaseelectrodes.
duetotheelectromagneticforcegeneratedbythearccurrent，thearcispushedtothefurnacewallbyelectromagneticforce，formingahotspotonthefurnacewall.itiseasytocausecorrosionandrefractorydamagetotherefractoryatthe
hotspot. thearcofadcarcfurnaceisproducedbetweentheelectrodeandthebottomofthefurnace，whichwillnotformahotspotonthewallofthefurnaceandwillnotdestroythewallofthefurnace. the4.furnaceismeltedevenly: thearcofthedcarcfurnaceisthecentralverticalform，thedistributionofheatisuniformandthefurnacematerialismeltedevenly.thethree-phasearcoftheacarcfurnaceisalateralform，andthethreephasearcaffectseachother，andthemeltingofthefurnaceisnotuniform. 5.tappingiscomplete: becausethearcofadcarcfurnaceisproducedbetweentheelectrodeandthebottomofthefurnace，thebottomofthefurnaceisformedandthemoltensteelwillnotcatchthebottomofthefurnacewhenthe
steelispouredoutofthemoltensteel.however，theacarcfurnacehasnohotfurnacebottomeffect.
6.dcarccurrentisstable. theaccurrentisover100timespersecond，andthereare100arcextinguishing，arcignition，rearcandrearcphenomenon，whichleadstotheinstabilityofacarc.however，
thedccurrentisonlyzero，andthereisnopolaritychange，sothedcarcismorestablethantheacarc. thepowerfactorofthe7.acarcfurnaceislow，andthepowerfactorofthedcarcfurnaceishigh. 8.energyconsumptionisless，andelectricityconsumptioncanbesavedfrom5%to10%. 9.thefrequentfluctuationofreactivepowerofacarcfurnacecausesthevoltageflickerofthepowergrid，andthereisnosuchphenomenoninthedceaf. thechangeofthearclengthofthethree-phasearcinthe10.acarcfurnaceisinconsistentintime，whichcausestheunbalancedthree-phaseloadandthegreatdisturbanceandimpacttothepowergrid.
thereisnosuchphenomenoninthedcarcfurnace. thereisflickerinthe11.acarcfurnace.inordertosolvetheflickereffectandmakeuptheinfluenceofthe
harmoniconthepowergrid，theacarcfurnaceneedstheexpensivereactivepowercompensationdevice.thedcarcfurnacedoesnotneed. 12.themixingeffectofmoltensteel: becausethedirectionofthedccurrentisconstant，thedcarchasastrongstirringeffectonthemoltensteel，whichmakesthefurnacemeltingwithoutdeadangle，andthealternatingcurrentarcisnot. theconsumptionofelectrodeendofthe13.dcarcfurnaceisreducedbyhalf. comparedwithacarc，dcarcscanworkathighimpedance.whenthesameinputpowerisapplied，thedcarcfurnacecanworkstablywithahighervoltageandsmallcurrentmode，therebyreducingtheconsumptionofelectrodeendsproportionaltothesquareofthecurrent. thecomparisonofthree，12pulsedcvoltageand6pulsedcvoltage: thefollowingisthevoltagewaveformdiagramofthethree-phase6pulseandthethree-phase12pulserectifyingcircuit.
itcanbeseenfromthediagramthatthepulsatingcoefficientofthe6pulserectifyingvoltageis0.057，andthe12pulserectifyingvoltagepulsationcoefficientis0.014.the12pulserectifiervoltagewavefor
mismuchmorestablethanthe6pulserectifiervoltagewaveform，anditsadvantagesare:thescintillationphenomenonisreduced，thearcisconstant，andthenoiseislow.itisthemaincurrentschemeofdcarcfurnace.
anyangyounengelectricco.，ltd.hasdevelopedaprototypeof12pulsedcelectricarcfurnace.itadoptsthetechnologyofhighspeed12
pulserectifierpowersupply.comparedwith6pulsedcelectricarcfurnace，ithasthefollowingadvantages:
1，thereactivepowerisreducedsignificantly，andthevoltagefluctuationdecreasessignificantly，andthecorrespondingflickerisalsogreatlyreduced.thepowerfactorofthenewtypeelectricfurnaceis
above0.95andtheflickerislessthan0.8%.itdoesnotneedthereactivepowercompensationdevice.
2，theharmonicdistortionofcurrentandvoltageisreducedandthetotalharmonicdistortionisimproved.
3，thesystemhasahighpowerfactor，becausetheflickerisgreatlyreduced，thearcismorestable.
the4and12pulserectifierpowersupplyhasstablevoltagewaveformandstrongcurrentflowcapacity.
theworkingstatehelpstoincreasethedcoutputcurrent，especiallyinthesteelmakingoperation，thearcstabilityiskeptconstant，andtheproductivityisimproved.
ourcompanycarriesondesign,productionandnon-ferrousmetalsmeltingprocessdesignofdcarcfurnace.thetechnologyisscientificandreasonable,
andtherecoveryrateofthesmeltingproductsishigh.
smeltingvarietiesare:copper,nickel,cobalt,lead,zinc,tin,antimony,bismuth,gold,silver,magnesium,
chromium,tungsten,molybdenum,manganese,tantalum,niobium,
siliconandferrosiliconandsiliconmanganesealloyandothernon-ferrousmetals.
