Cov Txheej Txheem Ua Hlau Manganese rau Kev Tsim Hlau
Manganese (Mn) yog ib qho tseem ceeb heev rau kev sib xyaw ua ke hauv kev lag luam hlau. Txawm hais tias cov ntsiab lus ntawm manganese hauv hlau feem ntau tsis siab npaum li cov ntsiab lus tseem ceeb xws li hlau (Fe) thiab carbon (C), nws lub luag haujlwm yog qhov tseem ceeb heev: ua kom muaj zog, tawv, tiv taus kev hnav, thiab pab txhawb rau cov txheej txheem refining thaum lub sijhawm smelting. Yog tsis muaj manganese, kev tsim cov hlau niaj hnub no yuav nyuaj rau ua tiav kev sib xyaw ua ke ntawm cov khoom siv kho tshuab uas xav tau rau kev tsim kho, tsheb, khoom siv hnyav, thiab kev tsim kho vaj tse. Txhawm rau nkag siab txog manganese txoj kev koom tes rau hlau, nws yog ib qho tseem ceeb uas yuav tsum tshuaj xyuas seb manganese ore raug ua tiav li cas rau hauv cov khoom npaj siv rau hauv cov txheej txheem steelmaking.
1. Cov Qhov Chaw thiab Cov Yam Ntxwv ntawm Manganese Ore
Cov hlau manganese yog los ntawm cov pob zeb uas muaj Mn ntau, xws li pyrolusite (MnO₂), psilomelane, manganite, thiab rhodochrosite. Cov ntsiab lus ntawm manganese hauv cov hlau sib txawv ntawm qis mus rau siab, thiab feem ntau nrog cov khoom tsis huv xws li hlau, silica (SiO₂), phosphorus (P), sulfur (S), thiab alumina (Al₂O₃). Cov khoom tsis huv no txiav txim siab txoj kev ua tiav, vim tias kev lag luam hlau muaj kev cuam tshuam loj heev rau phosphorus thiab sulfur, uas tuaj yeem ua rau cov hlau tsis zoo.
Feem ntau, cov manganese ore rau metallurgy yuav tsum ua tau raws li qee qhov yuav tsum tau ua, xws li cov ntsiab lus Mn txaus, qhov sib piv Mn / Fe tsim nyog, thiab cov ntsiab lus P thiab S qis. Txwv tsis pub, cov ore yuav tsum dhau los ntawm cov txheej txheem beneficiation (leaching, sib cais, lossis thawj zaug purification) ua ntej mus rau cov txheej txheem txo qis.
2. Theem Npaj: Kev Pab thiab Kev Kho Mob
Cov theem pib ntawm kev ua cov manganese ore lub hom phiaj yog kom nce cov ntsiab lus Mn thiab txo cov khoom tsis huv. Cov txheej txheem feem ntau suav nrog:
1. Kev sib tsoo thiab kev sib tsoo
Cov hlau raug tsoo kom muaj qhov loj me me kom ua rau kev sib cais zoo dua. Qhov loj me me dhau ua rau kev sib cais tsis zoo, thaum qhov loj me me dhau ua rau cov khoom muaj nqis poob ntau dua.
2. Kev sib cais ntawm lub ntiajteb txawj nqus thiab kev ntxuav
Vim yog qhov sib txawv ntawm cov manganese thiab gangue minerals, kev sib cais ntawm lub ntiajteb txawj nqus tuaj yeem ua rau cov ntsiab lus Mn ntau ntxiv. Kev ntxuav kuj pab tshem tawm cov av nplaum thiab cov av qias neeg ntawm qhov chaw.
3. Kev sib cais sib nqus thiab kev ntab dej
Qee cov ores xav tau kev sib cais sib nqus kom txo cov hlau ore content. Flotation feem ntau yog siv rau cov ores nyuaj nrog cov impurities uas nyuaj rau cais lub cev.
Thaum cov manganese txaus lawm, cov hlau tuaj yeem sib sau ua ke los ntawm kev sib xyaw ua ke lossis pelletizing. Kev sib sau ua ke txhim kho qhov permeability thiab kev ruaj khov ntawm cov khoom hauv lub cub tawg, ua rau cov txheej txheem txo qis zoo dua.
3. Cov Txheej Txheem Txo: Hloov Manganese Oxide mus ua ib qho Alloy Npaj Siv
Hauv kev lag luam hlau, manganese tsis tshua siv rau hauv nws daim ntawv hlau ntshiab vim nws tus nqi thiab cov kev xav tau ua tau. Cov hlau sib xyaw ua ke ntau dua yog ferromanganese (FeMn) thiab silicon manganese (SiMn). Ob qho tib si yog tsim los ntawm kev txo cov manganese ore hauv cov cub tawg kub siab.
3.1. Kev Tsim Khoom Ferromanganese (FeMn)
Ferromanganese yog ib qho hlau sib xyaw ua ke ntawm hlau thiab manganese, feem ntau muaj li ntawm 65–95% Mn, nyob ntawm hom. Ob yam khoom tseem ceeb yog:
– Cov pa roj carbon ntau Ferromanganese (HC FeMn): cov pa roj carbon ntau dua, cov txheej txheem pheej yig dua.
– Ferromanganese Carbon Nruab Nrab/Qis (MC/LC FeMn): cov pa roj carbon qis dua, siv thaum yuav tsum tswj cov pa roj carbon hauv cov hlau.
a) Qhov cub thiab cov ntaub ntawv raw
Feem ntau, kev tsim khoom ntawm FeMn siv lub cub tawg fais fab (SAF). Cov khoom siv tseem ceeb suav nrog:
- Manganese ore (los yog sib xyaw ntawm cov ores)
- Cov pa roj carbon txo (coke, thee, thee)
- Flux (limestone/dolomite) los khi silica thiab tsim slag
b) Txoj cai ntawm kev ua teb
Thaum kub siab, cov manganese oxides (piv txwv li, MnO₂) maj mam txo qis rau MnO thiab tom qab ntawd mus rau Mn hauv cov hlau sib xyaw. Cov pa roj carbon ua haujlwm ua tus neeg sawv cev txo qis, tsim cov pa roj CO / CO₂. Slag, ntawm qhov tod tes, yog tsim los ntawm cov tshuaj tiv thaiv ntawm cov khoom tsis huv xws li silica nrog flux, tso cai rau cov hlau theem (FeMn alloy) kom raug cais tawm ntawm slag.
c) Kev sib cais thiab kev sib tsoo
Tom qab ua tiav cov khoom sib xyaw uas xav tau, cov hlau uas yaj lawm raug coj los ntawm lub cub tawg. Cov slag thiab hlau raug cais raws li lawv qhov sib txawv ntawm qhov ceev. Tom qab ntawd cov hlau raug pov rau hauv cov ingots lossis tsoo kom muaj qhov loj me tshwj xeeb rau cov kev xav tau ntawm lub tshuab hlau.
3.2. Kev tsim cov Silikomanganese (SiMn)
Feem ntau Siliconanganese muaj li ntawm 60–70% Mn thiab li ntawm 14–20% Si. Cov hlau no nrov heev vim nws ua haujlwm ob lub hom phiaj tib lub sijhawm: manganese ua haujlwm ua tus ntxuav thiab ua kom muaj zog, thiab silicon ua haujlwm ua tus deoxidizer muaj zog.
Kev tsim SiMn kuj siv lub cub tawg arc uas nyob hauv qab dej, siv cov hlau manganese, quartz (ua qhov chaw ntawm Si), cov pa roj carbon reductant, thiab flux ua cov khoom siv raw. Cov txheej txheem yuav tsum tau tswj hwm qhov kub thiab txias thiab cov khoom sib xyaw slag kom ntseeg tau tias kev txo silicon thiab manganese zoo yam tsis muaj kev poob manganese ntau dhau rau slag.
4. Kev Tswj Xyuas Kev Ua Kom Huv Si thiab Kev Ua Kom Tsis Muaj kuab paug
Hauv cov ntsiab lus ntawm kev tsim cov hlau, qhov teeb meem tseem ceeb nrog manganese yog cov khoom tsis huv xws li phosphorus thiab sulfur. Cov phosphorus ntau tuaj yeem ua rau cov hlau tawg thaum kub qis, thaum sulfur tuaj yeem ua rau kub luv (brittleness thaum ua haujlwm kub). Yog li ntawd:
- Kev xaiv cov ores uas muaj P thiab S qis yog qhov tseem ceeb heev.
- Cov txheej txheem kev ua kom zoo thiab kev tswj hwm slag (basicity) pab khi cov khoom tsis huv.
- Rau cov khoom manganese zoo, cov txheej txheem smelting raug tswj thiab qee zaum cov khoom siv raw los ntawm ntau qhov chaw raug sib xyaw kom sib npaug.
Tsis tas li ntawd xwb, cov khoom ferromanganese uas muaj cov pa roj carbon tsawg feem ntau xav tau kev ua ntxiv, xws li decarburization, kom lawv haum rau cov hlau tshwj xeeb uas xav tau cov pa roj carbon tsawg.
5. Lub Luag Haujlwm ntawm Manganese hauv Cov Txheej Txheem Ua Hlau
Thaum muaj ferromanganese lossis silicomanganese, nws raug ntxiv rau cov txheej txheem ua hlau xws li lub cub tawg oxygen yooj yim (BOF) lossis lub cub tawg hluav taws xob (EAF), feem ntau yog nyob rau theem kawg ntawm kev smelting lossis thaum lub sijhawm ladle metallurgy. Lub luag haujlwm tseem ceeb ntawm manganese hauv hlau suav nrog:
1. Kev tshem tawm cov pa phem
Manganese pab khi cov pa oxygen uas yaj, tiv thaiv kom tsis txhob muaj porosity thiab qhov tsis zoo los ntawm oxides.
2. Desulfurization (txwv, nyob ntawm seb muaj tej yam mob dab tsi)
Manganese tuaj yeem tsim MnS, txo cov teebmeem tsis zoo ntawm cov sulfur. Txawm li cas los xij, nws qhov ua tau zoo nyob ntawm cov slag thiab cov xwm txheej ntawm cov txheej txheem.
3. Txhim kho cov khoom siv kho tshuab
Manganese ua rau lub zog tensile thiab toughness nce ntxiv, thiab txhim kho qhov hardenability hauv qee cov hlau.
4. Txo cov teebmeem tsis zoo ntawm lwm yam khoom
Piv txwv li, manganese pab khi cov sulfur kom txo tau qhov kub hnyiab.
6. Tej Yam Ib Puag Ncig thiab Kev Siv Hluav Taws Xob Zoo
Kev ua manganese, tshwj xeeb tshaj yog hauv SAF, xav tau kev siv hluav taws xob ntau thiab tsim cov pa roj (CO, CO₂) thiab cov khib nyiab slag. Yog li ntawd, kev lag luam tab tom nrhiav kev txhim kho kev ua haujlwm zoo los ntawm:
- Kev txhim kho kev siv hluav taws xob thiab kev txo cov pa roj carbon
- Siv cov pa roj tawm rau kev ua kom sov lossis tsim hluav taws xob
- Kev tswj hwm slag rau cov ntawv thov kev tsim kho tshwj xeeb (yog tias ua tau raws li cov qauv)
- Kev tswj cov hmoov av thiab cov khoom me me los ntawm cov tshuab lim dej
Kev ua raws li cov cai ib puag ncig yog ib qho tseem ceeb, tshwj xeeb tshaj yog vim tias kev ua haujlwm smelting tuaj yeem tsim cov hmoov av uas muaj cov hlau oxides.
Xaus
Cov txheej txheem ua cov hlau manganese rau kev tsim hlau muaj ntau theem, txij li kev npaj cov hlau (beneficiation), coagulation, yaj-txo hauv lub cub tawg arc, mus rau kev sib cais ntawm ferromanganese lossis silicomanganese alloys. Cov khoom siv alloy no ces siv rau hauv cov chaw ua hlau rau deoxidation, kev txhim kho khoom siv kho tshuab, thiab kev tswj hwm qhov tsis huv xws li sulfur. Nrog kev tswj hwm cov khoom siv raw, kev tsim cov txheej txheem, thiab kev tswj hwm ib puag ncig, manganese yog lub hauv paus tseem ceeb hauv kev tsim cov hlau zoo rau ntau yam kev xav tau kev lag luam niaj hnub.
Yog tias koj xav tau, kuv tuaj yeem ntxiv cov ntu tshwj xeeb ntawm cov ntawv qhia txog cov txheej txheem, hom cub tawg thiab lawv cov kev ua haujlwm, lossis kev sib piv FeMn vs SiMn rau cov ntawv thov hlau tshwj xeeb.
