Lub peev xwm ntawm lub peev xwm ntawmferrosiliconYog qhov tseem ceeb vim yog cov kev pheej hmoo siab ntawm silicon nrog oxygen thiab qhov ruaj khov ntawm cov khoom. Cov txheej txheem tshwj xeeb yog raws li hauv qab no:
Thermodynamic hauv paus ntawm cov pa oxygen muaj affinity:
Cov tshuaj lom neeg siv hluav taws xob muaj zog nruab nrab ntawm silicon (Si) thiab oxygen (2sio +}}}}} kj / mol). Qhov no txhais tau tias thaum muaj qhov kub thiab txias, silicon nyiam sib xyaw nrog oxygen, hauv paus pom zoo los ntawm kev oxygen los ntawm Molten Steel / Hlau.
Kev tshem tawm yooj yim ntawm cov tshuaj tiv thaiv:
Silicon reacts nrog oxygen los ua silicon dioxide (sitio₂), uas muaj lub ntsiab lus siab ntawm 1713 degree. Nyob rau hauv Molten Hlau (1500-1600 Qib), nws muaj cov khoom khov kho nrog qhov ntom ntom (2.65 g / cmÃ) ntau qis dua li ntawm molten hlau (7.8 g / cm³). Nws nrawm nrawm mus rau saum npoo ntawm Molten hlau thiab raug tshem tawm nrog rau lub swb, ua tiav kev sib cais oxygen tau zoo.
High - kub ruaj ruaj kom ua tiav cov tshuaj tiv thaiv tiav:
Silicon muaj lub ntsiab lus melting ntawm 1410 degree, thaum ferro silicon alloys (xws liFesi75) Muaj lub ntsiab lus melting ntawm kwv yees li 1200 degree, qis dua qhov siab-} huab cua kub ib puag ncig ntawm steelmaking / casting (1500-1600 degree). Tom qab ntxiv, Fesi melts nrawm nrawm, tso cai silicon atoms kom diffuse tag nrho thiab rov qab ua pa oxygen, tsis txhob muaj kev phom sij hauv zos.
Cov yam ntxwv tseem ceeb Txhawb Ferrosilicon Deagidation
Cov ntsiab lus silicon siab kom ua rau deoxidation muaj peev xwm:
Cov qhab nia siv ferrosilicon qib yog fesi75 (silicon cov ntsiab lus 72% -80%) thiabFesi65(Silicon cov ntsiab lus 60% - 65%). Qhov ntau dua cov ntsiab lus silicon, ntau dua lub deoxidation ua tau zoo ib chav ntawm ferrosilicon. Piv txwv li, 1 kg ntawm Ferrro silicon 75% tuaj yeem tshem tawm txog 0.4 kg ntawm oxygen los ntawm Molten hlau, uas yog 1.5-2 lub sij hawm uas ntawm cov roj ntsha tsawg.
Cov tshuaj tiv thaiv tus nqi haum rau cov txheej txheem metallurgical:
Cov tshuaj tiv thaiv kab ntsig ntawm silicon thiab oxygen nce nrog ntsuas kub. Saum toj 1500 degree, cov tshuaj tiv thaiv tuaj yeem ua tiav hauv feeb, "zam kev ua kom ntev ntawm cov hlau oxidation thiab luv luv smelfary ntawm Molten Steel Deoxidation Times.
Tsis muaj kev phom sij impurities tau qhia:
FERRO Silicon lub ntsiab lus tseem ceeb yog silicon thiab hlau, pub dawb ntawm cov teeb meem ntawm cov neeg sulfur xws li 0.05%, p tsawg dua lossis sib npaug nrog 0.04%). Nws tsis paug lub Molten Steel thaum deoxidation, ua kom muaj kev coj dawb huv ntawm cov khoom siv hlau.
Cov ntawv thov siv thiab cov teebmeem ntawm ferrosilicon deoxidation
Deagidation lub ntsiab hauv steelmaking:
Nyob rau hauv Converter thiab Fais Arc rauv taws ua kom zoo nkauj, ferrosilicon alloy feem ntau siv hauv kev sib xyaw nrog ferromanganese thiab txhuas ("} deoxidation + txhuas kawg deoxidation"). Lub ferrosilicon 75% ntxiv yog li ntawd 0.3% -0.8% ntawm Molyen Steel loj, uas tuaj yeem txo cov pa roj oxygen
Foundry Dazidation:
Hauv kev tsim cov hlau thiab cov hlau cam khwb cia cam khwb cia hlau, fesi alloy tuaj yeem ua tiav tag nrho deoxidation thiab inoculation teebmeem. Ntxiv 0.2% -0.5%
Tshwj xeeb tag nrho deoxidation:
Hauv kev tsim cov hlau stainless thiab tsawg -} almoy steel, sivTsawg -} aluminium ferrosilicon(Tsis pub dhau los lossis sib npaug ntawm 1%) tuaj yeem tiv thaiv kev tsim ntawm aln suav los ntawm aluminium reacting nrog nitrogen nyob rau hauv cov hlau, kom pom kev ntawm alloy corrosion tsis kam thiab weldability.
Qhov tseem ceeb rau kev cuam tshuam rau Ferrosilicon deoxidation nyhuv
Ferrosilicon Qib Xaiv:
Txog siab -}}}}}}}}} Tus lej steel (xws li cov hlau thiab lub caij nplooj ntoo hlau), FESI75 yog nyiam kom ntseeg tau deoxidation kom meej; Rau tib neeg cov pa roj carbon hlau, fesi65 tuaj yeem siv rau kev sib npaug nqi thiab cov nyhuv.
Sijhawm thiab Txuj Kev Ntxiv:
Nws yuav tsum tau ntxiv ua ntej lossis thaum lub sij hawm tapping txheej txheem ntawm Molten Steel kom tsis txhob ua ntej ntxiv ua rau silicon oxidation los ntawm slag; Cov hluav taws xob hluav taws xob hluav taws xob tuaj yeem siv lub tshuab hluav taws xob loj tuaj yeem siv tau hluav taws xob hluav taws xob tau siv tau siv tau "- Tsis tau" txoj kev los ua kom meej meej kev sib xyaw ua ke ntawm ferrosilicon thiab Molten hlau.
Tus tswj hwm tus kub:
Thaum qhov kub nyob qis dua 1400 degree, cov tshuaj tiv thaiv tus nqi ntawm silicon thiab oxygen txo qis. Nws yog ib qho tsim nyog yuav tsum kom ntseeg tau tias cov hlau kub tsis poob qis dua 1500℃kom tsis txhob muaj kev txo qis hauv deoxidation efficiency.
Slag yooj yim txuam:
Thaum lub slag yooj yim (sabo / sio₂) yog tswj hwm ntawm thaj tsam ntawm 1.8 thiab 2.2, txo qis ntawm cov steel rau hauv cov hlau thiab txhim kho deoxidation ruaj khov.
Qhov Zoo thiab Kev Lag Luam Tus nqi ntawm Ferrosilicon Deagidation
Siab tus nqi - ua tau zoo:
Lub Derrosilation Ferrosilicon tsuas yog 1/3 txog 1/2 txog 1/2, thiab nws yog dav muaj deoxidizer hauv industrial {} teev ntau lawm.
Cov txheej txheem muaj zog hloov tau:
Nws tuaj yeem hloov kho rau cov khoom sib txawv metallurgical xws li cov khoom siv hluav taws xob, cov tshuab hluav taws xob, tsis tas yuav tsum tau kho dua tshiab, thiab yog yooj yim rau kev khiav lag luam.
Nws muaj ntau lub zog:
Thaum deaxidizing, nws tuaj yeem hloov cov silicon thiab kho cov compositioning ntawm steel / hlau (xws li kev txhim kho lub zog ntawm cov hlau cam khwb cia ntawm cov khoom cam khwb cia ntawm cov khoom siv cam khwb cia ntawm kev siv ".
