Cov txheej txheem tseem ceeb rau kev tsim khoommagnesium hlauyog tus txheej txheem Pidgeon.Ferro Silicon 75, vim nws cov ntsiab lus silicon siab thiab cov ntsiab lus impurity tsawg, yog qhov zoo tshaj plaws txo tus neeg sawv cev xaiv. Lub ntsiab lus tseem ceeb rau nws qhov haum yog raws li hauv qab no:
Cov ntsiab lus ntawm silicon ntawm 72% -80% ua kom tiav cov tshuaj tiv thaiv txo qis, thiab nws cov nqi qis dua cov qib silicon siab dua xws li FeSi90, ntsuas kev ua haujlwm thiab kev lag luam;
Cov txheej txheem Pidgeon yuav tsum muaj qhov hnyav ntawm 1150-1250℃thiab lub tshuab nqus tsev ntawm 1-10 Pa. Cov tshuaj lom neeg ruaj khov ntawm FeSi 75% tsis txhob muaj kev cuam tshuam sab nraud, kom ntseeg tau tias purity ntawm cov khoom magnesium;
Hauv kev tsim khoom lag luam, 1.2-1.3 tons ntawm 75FeSi tau noj rau txhua tuj ntawm magnesium hlau tsim, ua rau nws "core ntawm tus nqi thiab kev ua haujlwm" hauv magnesium smelting.
Lub luag hauj lwm thiab Kev Txhaum Cai ntawm FeSi75 hauv Magnesium Smelting
(1) Core Reduction Reaction
Silicon nyob rau hauv FerroSilicon 75 ua raws li lub hauv paus tseem ceeb txo cov ntsiab lus, tab tom hloov pauv cov tshuaj tiv thaiv nrog calcined dolomite (CaO・MgO) los tsim cov roj magnesium thiab calcium silicate. Qhov sib npaug ntawm cov tshuaj tiv thaiv yog raws li nram no:
Lub ntsiab lus:2MgO・CaO + Si (los ntawm FerroSilicon 75%) → 2Mg↑ + Ca₂SiO₄ (Tub kub 1150-1250 degree, Nqus 1-10Pa)
Thermodynamic Basis:Tus qauv Gibbs dawb zog (ΔG degree) ntawm cov tshuaj tiv thaiv no yog -68kJ / mol ntawm 1200 degree, txaus siab rau cov xwm txheej rau cov tshuaj tiv thaiv tus kheej; qhov sib txawv ntawm cov electrode muaj peev xwm ntawm silicon thiab magnesium (Si⁴⁺/Si=-0.86V, Mg²⁺/Mg=-2.37V) ua kom qhov tseem ceeb txo qis.
(2) Kauj Ruam -los ntawm -Txoj Kev Ntsuam Xyuas Cov Txheej Txheem Kev Tawm Tsam
Raw Material Pretreatment: Dolomite (CaCO₃・MgCO₃) yog calcined ntawm 900-1000℃kom decompose rau hauv calcined dawb (CaO・MgO);
Khoom ntim thiab nias:Calcined dawb thiabFeSi75 hmoov(loj tsawg dua lossis sib npaug li 1 hli) yog sib xyaw ntawm qhov sib piv ntawm 7: 1, thiab ib daim ntawv ntxiv rau nias rau hauv pellets (inch 20-30mm);
Vacuum Reduction:Cov pellets raug thauj mus rau hauv lub tank txo thiab ua kom sov rau... Ntawm 1150-1250 degree, nyob rau hauv lub tshuab nqus tsev ntawm 1-10 Pa, silicon txo MgO los tsim Mg vapor.
Condensation thiab collection:Lub Mg vapor yog txias los ntawm lub condenser nyob rau sab saum toj ntawm lub tank txo, condensing rau hauv cov khoom crude magnesium (purity ntau dua los yog sib npaug rau 99.5%).
Refining thiab purification:Cov magnesium crude yog refined nrog molten ntsev (xws li, ib tug NaCl-KCl-MgCl₂ system) kom tshem tawm cov kab impurities, yielding siab - purity magnesium (Ntau dua los yog sib npaug rau 99.9%).
Kev xav tau zoo ntawm FeSi75
Cov ntsiab lus purity thiab impurity ntawm 75 # FerroSilicon ncaj qha cuam tshuam tus nqi rov qab thiab purity ntawm magnesium.
| Qhov taw qhia hom | Kev Xav Tau Scope | Kev cuam tshuam ntawm Kev Tshaj Tawm Tshaj Tawm |
| Silicon (Si) Cov ntsiab lus | 72%-80% | 72%: Incomplete reduction reaction, magnesium recovery rate decreases by 5%-8%; >80%: Tus nqi nce ntxiv, tsis muaj kev txhim kho ntxiv. |
| Aluminium (Al) cov ntsiab lus | Tsawg dua lossis sib npaug li 1.0% (zoo dua Tsawg dua lossis sib npaug li 0.5%) | >1.0%: Txhim kho cov reactivity ntawm FeSi75, ntau heev noj txo tus neeg sawv cev, thiab nce FeSi75 noj ib tuj ntawm magnesium los ntawm 5% -10%. |
| Cov ntsiab lus carbon (C). | Tsawg dua lossis sib npaug li 0.2% | ＞ 0.2%: MgC₂ byproduct yog tsim, ua rau magnesium purity poob qis dua 99%, cuam tshuam rau kev ua haujlwm tom qab. |
| Sulfur (S) cov ntsiab lus | Tsawg dua lossis sib npaug li 0.05% | ＞ 0.05%: Cov ntawv MgS suav nrog magnesium, txo cov plasticity thiab corrosion kuj ntawm magnesium. |
| Phosphorus (P) cov ntsiab lus | Tsawg dua lossis sib npaug li 0.04% | ＞ 0.04%: Induces brittleness nyob rau hauv magnesium alloys; tsis haum rau siab -kawg magnesium alloys (xws li aerospace magnesium alloys) |
| Loj | Tsawg dua los yog sib npaug li 1 hli (hmoov) | ＞ 1mm: Kev sib xyaw tsis tiav nrog cov hmoov dawb calcined, ua rau txo qis cov tshuaj tiv thaiv hauv qee qhov chaw thiab hloov pauv hauv cov tshuaj tiv thaiv hauv lub nkoj ntawm ± 10%. |
Core Impacts ntawm FeSi75 ntawm Magnesium Production
(1) Kev cuam tshuam rau Magnesium rov qab tus nqi
Thaum cov ntsiab lus silicon ntawm 75% FeSi yog 75% thiab Al Tsawg dua los yog sib npaug rau 0.5%, cov magnesium rov qab tuaj yeem ncav cuag 85% -90%;
Thaum cov ntsiab lus silicon poob rau 70%, tus nqi rov qab poob mus rau 78% -82%; Thaum cov ntsiab lus Al nce mus rau 1.5%, tus nqi rov qab poob ntxiv mus rau 75% -78%.
(2) Kev cuam tshuam rau Magnesium Purity
Siab - zoo FeSi75# (tag nrho impurities Tsawg dua lossis sib npaug li 1.5%) tuaj yeem tsim tau 99.7%-99.9% magnesium refined;
Yog hais tias cov ntsiab lus carbon ntawm FeSi75 tshaj tus qauv mus rau 0.3%, magnesium purity poob mus rau 99.2% -99.5%, yuav tsum tau ntxiv cov nqi refining.
(3) Kev cuam tshuam rau cov nqi tsim khoom
FerroSilicon75 tso nyiaj rau 60% -70% ntawm cov khoom siv raw khoom hauv magnesium smelting. Tus nqi hloov pauv ntawm 1000 RMB / tuj sib haum rau kev hloov pauv ntawm 1200-1300 RMB hauv tus nqi ib tuj ntawm magnesium.
Txawm hais tias tus nqi yuav khoom ntawm qis- impurity 75 FerroSilicon alloy (Al Tsawg dua lossis sib npaug li 0.5%) yog 5%-8% siab dua, nws tuaj yeem txo qhov kev noj cov tshuaj txo tus neeg sawv cev thiab cov nqi kho kom zoo, ua rau txo qis 3%-5% ntawm tag nrho cov nqi ib tuj ntawm magnesium.
Cov tswv yim ua kom zoo rau kev siv FeSi75 hauv Magnesium Smelting
(1) Raw Khoom Xaiv thiab Kev Tswj Xyuas Zoo
FeSi75-Al0.5qib (Al Tsawg dua lossis sib npaug li 0.5%) yuav tsum tau ua ntej, zam kev siv cov qib siab - alumina thiab siab - qib carbon.
Kev tshuaj xyuas tuaj:Lub spectrometer yog siv rau kev tshawb nrhiav ceev ceev ntawm cov cim tseem ceeb xws li Si, Al, thiab C. Kev ntsuas me me - ntsuas qhov ntsuas qhov ntsuas yog ua los ntawm cov qauv los ntawm txhua pawg los txheeb xyuas cov kev ua ub no.
(2) Txheej txheem Parameter Adaptation
Loj:Qhov loj me me ntawm FeSi75 hmoov yog tswj ntawm 0.1-1mm, thiab qhov sib xyaw ua ke nrog calcined dawb hmoov yog ntau dua lossis sib npaug li 95% kom paub meej cov tshuaj tiv thaiv txaus;
Txo cov xwm txheej:Qhov kub thiab txias yog ruaj khov ntawm 1200 ± 20 degree, thiab lub tshuab nqus tsev yog khaws cia hauv qab 5Pa kom tsis txhob ua tiav cov tshuaj tiv thaiv ntawm FeSi75 vim qhov kub hloov pauv.
(3) Impurity Control thiab Side Reaction Suppression
Cov pa roj carbon monoxide:0.1%-0.2% limestone (CaCO₃) yog ntxiv rau cov pellets kom tshem tawm cov tshuaj tiv thaiv ntawm cov pa nrog MgO los ua MgC₂;
Refining Support:Ib txheej txheem dual ntawm "nqus txo qis + molten ntsev refining" yog saws los tshem tawm cov kab impurities qhia los ntawm FeSi75, kom ntseeg tau tias magnesium purity ua tau raws li cov qauv.
Kev Lag Luam Kev Lag Luam: Txhim kho cov lus qhia ntawm FeSi75 hauv Magnesium Smelting
Tsawg Hybridization:
High-kawg magnesium alloys (rau aerospace thiab electronics) muaj cov kev cai nruj dua rau cov impurities hauv 75FeSi alloy, ua rau muaj kev xav tau ntau ntxiv rau FeSi alloy 75 tshwj xeeb nrog Al Tsawg dua lossis sib npaug li 0.3% thiab C Tsawg dua lossis sib npaug li 0.1%;
Ntsuab ntsuab:
Siv FeSi75 alloy tsim nrog hluav taws xob ntsuab tuaj yeem txo cov pa roj carbon emissions los ntawm magnesium smelting los ntawm ntau tshaj 50%, ua raws li lub ntiaj teb sib txawv ntawm carbon neutrality;
Kev ua haujlwm siab:
Developing ib "FeSi75 + lub ntiaj teb tsis tshua muaj"Composite txo tus neeg sawv cev tuaj yeem txo qhov kub ntawm 50-80℃thiab txo qis kev siv hluav taws xob ib tuj ntawm magnesium los ntawm 800-1000kWh, txhim kho kev tsim khoom.
