Dab tsi yog cov txiaj ntsig ntawm kev siv Ferro Silicon 72 hauv kev tsim cov hlau?

Ferro Silicon 72yog binary ferroalloy nrog cov ntsiab lus silicon ntawm 70% -74% thiab cov ntsiab lus hlau ntawm 25% -29%. Nws cov ntsiab lus impurity ua raws li GB / T 2272-2017 tus qauv (Al Tsawg dua lossis sib npaug rau 1.0%, S Tsawg dua lossis sib npaug rau 0.05%, P Tsawg dua lossis sib npaug li 0.04%). Nws cov yam ntxwv tseem ceeb txhawb nqa nws qhov tsim nyog rau kev tsim steel:

 Melting point: kwv yees li 1260 degree, qis duaFeSi 75(1280 degree), uas ua rau kom tawg sai dua hauv cov hlau molten (ua tiav kev tawg hauv 5-8 feeb);
 Tsis tshua muaj zog dawb ntawm cov tshuaj tiv thaiv ntawm silicon thiab oxygen, ua rau muaj zog deoxidation kev ua si. Tsis tas li ntawd, nws cov ntsiab lus sib npaug silicon sib npaug deoxidation efficiency thiab tus nqi;
 Lub cev lub cev: blocky (10-50mm) lossis granular (1-10mm), yoog raws li kev pub noj ntawm ntau yam khoom siv steelmaking.

(1) High-kev ua tau zoo deoxidation: Txhim kho cov purity ntawm molten steel thiab txo qhov tsis xws luag

72FeSi optimizes qhov zoo ntawm cov hlau molten los ntawm kev ua dual ntawm "ntau deoxidation + slag sau thiab purification":

Deoxidation tshuabanism:

Silicon reacts nrog FeO hauv cov hlau molten (Si + 2FeO → SiO₂ + 2Fe), tsim SiO₂ nrog qhov ceev ntawm 2.65 g / cm³, qis dua cov hlau molten (7.8 g / cm³), ua kom yooj yim rau ntab thiab tshem tawm nrog cov slag; Nyob rau tib lub sijhawm, SiO₂ tuaj yeem tsim qis- melting- taw tes sib xyaw slag (melting point nyob ib ncig ntawm 1400 degree) nrog CaO thiab Al₂O₃, txhim kho cov slag lub peev xwm los adsorb inclusions.

Quantitative Effects:

Thaum ntxiv ntawm 0.3% -0.7% ntawm cov hlau molten, cov pa oxygen ntawm cov hlau molten tuaj yeem raug txo los ntawm 80-100 ppm rau 30-50 ppm, thiab deoxidation efficiency yog 30% siab dua li cov tsoos.ferrosilicon(xws liFeSi65). Cov ntaub ntawv los ntawm cov nroj tsuag steel converter steelmaking daim ntawv thov qhia tau hais tias tom qab siv FerroSilicon72, cov seem seem los ntawm oxide inclusions poob los ntawm 1.2% mus rau 0.3%, thiab cov billet tsim nyog tus nqi nce 0.9 feem pua ​​cov ntsiab lus.

Txheej txheem Adaptability:

Hauv converter steelmaking, nws tuaj yeem siv ua ntej -deoxidizer (ntxiv ua ntej tapping) lossis deoxidizer zaum kawg (ntxiv rau thaum tapping). Nyob rau hauv LF furnace refining, nws tuaj yeem siv rau kev sib sib zog nqus deoxidation, hloov mus rau qhov xav tau ntawm cov theem sib txawv.

(2) Precision Alloying: Customizing Mechanical thiab Functional Properties of Steel

FeSi alloy 72 ua tiav qhov kev ua kom zoo ntawm cov khoom siv hlau los ntawm cov khoom siv ntxiv dag zog thiab kev tswj muaj pes tsawg leeg:

Strengthening Mechanism:

Tom qab silicon atoms yaj nyob rau hauv lub ferrite lattice, lawv induce lattice distortion, inhibiting dislocation txav thiab refining cov nplej (grain loj txo los ntawm 50μm mus rau 30-40μm), ho txhim kho lub zog thiab hardness ntawm cov hlau.

Daim ntawv thov cuam tshuam ntawm ntau qib steel:

 45 # Siab -Quality Carbon Structural Steel:Ntxiv Ferro Silicon alloy 72 tswj cov ntsiab lus silicon hauv cov hlau mus rau 0.17% -0.37%, ua kom lub zog tensile ntawm 600MPa rau 690-720MPa (nce 15% -20%), thiab lub zog tawm los ntawm 355MPa rau 410-430MPa;

 Silicon hlau (Electrical Steel):Rau txhua txhua 1% nce hauv cov ntsiab lus silicon, hlau poob qis los ntawm kwv yees li 10%, thiab sib nqus permeability nce 15% . 72% FeSi tso cai rau kev tswj cov ntsiab lus ntawm silicon hauv silicon steel rau 2.0% -3.5%. Thaum siv hauv transformer cores, nws txo cov tub ntxhais poob los ntawm 20% -25% thiab txhim kho lub zog xa hluav taws xob los ntawm 3% -5%.

 Tsawg- alloy siab- lub zog steel (xws li Q345):Ntxiv FeSi72% ntxiv rau silicon rau 0.2%-0.5% nce tensile lub zog los ntawm 10%-12% yam tsis muaj kev txo cov toughness (elongation tseem ntau dua los yog sib npaug rau 21%), ua rau nws haum rau engineering structural Cheebtsam.

(3) Kev Txhim Kho Tus Nqi: Txo tag nrho cov khoom siv hluav taws xob thiab kev siv nyiaj

FeSi72 tus nqi-kev ua tau zoo zoo permeates tag nrho cov txheej txheem steelmaking, ua tiav cov nqi txo thiab txhim kho kev ua haujlwm:

Raw Material Cost Advantage:

Tus nqi silicon yog 8%-10% qis dua FerroSilicon 75 thiab 15%-20% qis dua FeMn alloy. Ib tsob nroj steel loj loj (ib xyoos ib xyoos muaj peev xwm ntawm 1 lab tons) tau txais txiaj ntsig ntau dua 20 lab yuan hauv cov khoom siv raw cov nqi txhua xyoo tom qab hloov qee cov nqi siab nrog FeSi72;

Energy Consumption Optimization:

Vim nws cov ntsiab lus melting tsawg thiab tawg sai, nws tuaj yeem txo lub sijhawm smelting los ntawm 10% -15%, txo cov hluav taws xob arc rauv steelmaking hluav taws xob siv ib tuj ntawm steel los ntawm 8% -12% (kwv yees li 60-80 kWh / ton ntawm steel), thiab txo cov converter steelmaking oxygen noj los ntawm 3% -5%;

Auxiliary Material Savings:

SiO₂ tsim tawm thaum lub sij hawm deoxidation tuaj yeem siv los ua cov khoom tseem ceeb ntawm slag, txo cov slag - ua cov tshuaj xws li txiv qaub los ntawm 15% -20%, thiab txo cov nqi khoom siv ib tuj ntawm cov hlau los ntawm 8-12 yuan.

(4) Ntau-scenario adaptability: npog tag nrho cov txheej txheem steelmaking

Ferro Silicon 72 yog hloov tau rau ntau yam xwm txheej xws li hloov pauv, hluav taws xob arc rauv, kho kom zoo, thiab casting, nrog ntau yam muaj zog:

Hloov steelmaking:

Raws li lub ntsiab deoxidizer, nws yog tsim rau carbon structural steels xws li Q235 thiab Q345, nrog rau qhov ntxiv ntawm 0.4% -0.7%, uas tuaj yeem txo cov pa oxygen ntawm cov hlau molten sai thiab tsis txhob oxidation theem nrab;

Electric arc rauv steelmaking:

Nws ua rau deoxidation thiab alloying yuav tsum tau nqa tawm ib txhij, haum rau alloy structural steels xws li 40Cr thiab 20MnV, nrog ib tug ntxiv npaum li cas ntawm 0.3% -0.6%, shortening lub smelting voj voog thiab txhim kho ntau lawm efficiency;

LF rauv refining:

Siv rau kev sib sib zog nqus deoxidation ntawm siab -kawg steels xws li bearing steel thiab caij nplooj ntoos hlav steel, nrog rau qhov sib ntxiv ntawm 0.2% -0.4%, ua ke nrog argon nplawm, nws tuaj yeem txo cov pa oxygen ntawm cov hlau molten mus rau 20-30ppm, ua tau raws li qhov xav tau ntawm purity siab;

Casting kev lag luam:

Raws li cam khwb cia hlau inoculant, qhov sib ntxiv yog ib feem ntawm cov hlau molten . 0.2% -0.5% txhawb graphitization nag lossis daus, refines nplej, thiab tsub kom qhov cuam tshuam toughness ntawm grey cam khwb cia hlau los ntawm 20% -30%, ua rau nws haum rau castings xws li cav blocks thiab tshuab cuab tam txaj.

(1) Precise Control ntawm Cov Nyiaj Ntxiv

 Muab xam raws li lub hom phiaj silicon cov ntsiab lus ntawm qib steel:Ntxiv tus nqi (kg / ton ntawm steel)=(lub hom phiaj silicon cov ntsiab lus - thawj cov ntsiab lus silicon) × 1000 / (FeSi72 silicon cov ntsiab lus × silicon rov qab tus nqi), silicon rov qab tus nqi feem ntau yog 75% -85% (me ntsis qis dua rau cov converters, me ntsis siab dua rau hluav taws xob furnaces);
 Tsis txhob muab ntau dhau:Thaum cov ntsiab lus ntawm silicon nyob rau hauv cov hlau ntau tshaj 0.6%, nws yuav ua rau txo qis hauv weldability ntawm cov hlau thiab txo cov kev cuam tshuam toughness (qhov cuam tshuam lub zog yuav qis dua 34J ntawm tsawg dua lossis sib npaug rau -20 degree).

(2) Lub Sijhawm thiab Txheej Txheem Ntxiv

 Hloov steelmaking:Ntxiv thaum cov hlau yog 1/3 tag nrho thiab tiav thaum nws yog 2/3 tag nrho, xyuas kom meej sib xyaw nrog cov hlau molten;
 Electric rauv steelmaking:Ntxiv rau cov theem tom ntej ntawm lub cub tawg nqi melting (molten steel kub 1500-1550 degree) kom tsis txhob silicon burn-tawm vim thaum ntxov ntxiv;
 LF rauv refining:Ntxiv thaum lub argon nplawm kev siv yog tswj ntawm 0.3-0.5 m / s los txhawb lub flotation ntawm deoxidation khoom.

(3) Kev Tswj Xyuas Kom Zoo thiab Kev Tswj Xyuas Zoo

 Cia:Khaws rau hauv qhov chaw qhuav thiab qhov cua kom tsis txhob ya raws oxidation (oxidation yuav tsim SiO₂ zaj duab xis rau saum npoo, txo cov kev ua deoxidation). Lub sijhawm khaws cia yuav tsum tsis pub tshaj 6 lub hlis;
 Kev soj ntsuam zoo:Ua ntej siv, sim cov ntsiab lus silicon thiab impurities siv lub spectrometer kom ua tau raws li GB / T 2272-2017 cov qauv, zam qhov cuam tshuam ntawm cov khoom sib txawv ntawm cov txiaj ntsig steelmaking.