Cov txheej txheem ntau lawm
High-pa roj carbon ntau dua yog feem ntau tsim los ntawmsubmerged arc rauv (saf) smelting, ua raws cov kauj ruam tseem ceeb no:
Cov Khoom Siv Raw
Silica (quartz, sio₂): lub ntsiab silicon los (~ 60-70% purity) .
Carbonaceous Txo Cov Roj Hmab: Roj Coke, thee, lossis hluav ncaig .
Cov Khoom Siv Hlau (yeem): ntxiv rau kho cov ntsiab lus hlau hauv qee qib {}}
Smelting txheej txheem
Cov Khoom Siv Raw Ua Txij Nkawm: Quartz thiab cov khoom siv carbon thiab cov pob roj carbon thiab cov pob roj carbon thiab cov pa roj ntsha piv rau .
Kev ntsuas kub hnyav:
Cov sib tov yog rhuab mus rau 1600-1800℃hauv ib qho hluav taws xob arc rauv .
Tshuaj lom neeg:
Sio 2+3 C} C} C} sic+2}}} → sic {}}}
Refining & Casting:
Impurities (al, ca) tau muab tshem tawm ntawm kev kho kom zoo lossis flux .
Lub Moly Alloy tau muab pov rau hauv cov lumps, granules, lossis hmoov rau kev lag luam siv .
Environmental & Cov Kev Txiav Txim Zog
Kev Siv Zog: ~ 8, 000}}}}}} {} kwh ib tuj .
Emissions: Co thiab CO₂ roj yuav tsum tau lim kom zoo .
Kev Tswj Khib: Slag Byproducts tuaj yeem muaj cov hlau zoo nkauj .
Tshuaj lom neeg & khoom siv lub cev
Cov yam ntxwv tseem ceeb
| Ntiag tug | Tus nqi raug / Ntau Yam |
|---|---|
| Silicon (Si) Cov Ntsiab Lus | 55–75% |
| Carbon (c) cov ntsiab lus | 8–20% |
| Melting taw tes | ~ 1300-1400 degree |
| Ceev | 2.5-3.0 g / cm³ |
| Kev tshwm sim | Grey-Dub Hlau Metallic Lumps |
Ua hauj lwm zoo
Dual Lub Luag Haujlwm: Khoom Plig ob qho tib si Si (Deoxidizer) thiab C (Carburizer) hauv ib qho ntxiv .
Nqi zog: pheej yig dua ferrosilicon + graphite sib txuas .
Txhim kho cov tawv nqaij zoo: txo cov ntsiab lus pa oxygen thiab muab cov khoom siv tshuab ua kom zoo nkauj .
Cov ntawv thov hauv kev lag luam
Steelmaking
Deoxidation:
Hloov ferrosilicon hauv qee cov ntawv thov vim muaj kev ua haujlwm siab dua .
Txo cov nplais tsim thiab suav nrog cov hlau .
Alloying Tus Neeg Sawv Cev:
Txhim kho hardness, lub zog, thiab corrosion tsis kam .
Carburization:
Kho cov roj carbon ntau qib hauv cov roj av tsawg- thiab cov pa roj carbon mon ... 2}}
CIA MAACK NTAU LAWM
Txhawb nqa graphitization: txhim kho machinity thiab thermal conductivity .
Txo cov shrinkage tsis xws luag: txhim kho fluws fluidity .
Lwm Yam Siv
Silicon carbide (sic) kev tsim khoom: raws li ib tug precursor rau abrasives thiab ripractories .
Vuam & brazing alloys: txhim kho cov tub lim cov khoom siv hlau .
Cim npe nrov: Kev tsom xam ntau ntawm high-pa roj carlicon, Tuam Tshoj tau nkag siab txog ntawm high-carbon cov khoom lag luam, lwm tus neeg, Hoobkas