Hauv kev tsim steel niaj hnub no, kev nrhiav kev ua haujlwm siab - zoo, siab - cov khoom siv hlau ua tau zoo tau tsav qhov kev ua kom zoo ntxiv ntawm cov khoom siv hlau. Ntawm lawv,10-50mm Calcium Silicon (CaSi) Lumpstau tshwm sim los ua ib qho tseem ceeb ntawm cov khoom siv ntau yam, dav siv hauv deoxidation, desulfurization, thiab kev hloov pauv hauv kev suav nrog. Lawv qhov tshwj xeeb qhov loj me sib npaug tswj kev yooj yim, cov tshuaj tiv thaiv kev ua haujlwm, thiab kev tswj hwm tus nqi, ua rau lawv yog cov khoom siv hauv converter, hluav taws xob arc rauv (EAF), thiab cov txheej txheem ladle refining.
Calcium Siliconyog ferroalloy uas muaj calcium (Ca), silicon (Si), thiab hlau (Fe), uas yog tsim los ntawm smelting silica (SiO₂), limestone (CaCO₃), hlau seem, thiab coke nyob rau hauv lub submerged arc rauv. Qhov "10-50mm" specification yog hais txog qhov loj ntawm cov hlau tom qab crushing thiab tshuaj ntsuam-ib ntau haum raws li cov kev xav tau ntawm kev lag luam: cov khoom me dua 10mm yuav ua rau oxidation thiab plua plav poob, thaum cov loj dua 50mm yaj maj mam thiab disperse unevenly nyob rau hauv cov hlau molten. Qhov loj me no suav nrog ntau dua 60% ntawm calcium silicon noj hauv kev lag luam steel.
Ntsiab tshuaj & Lub cev Specifications
|
Qhov taw qhia qeb |
Qhov taw qhia tseem ceeb |
Standard Range (Industrial Qib) |
Muaj nuj nqi tseem ceeb |
|---|---|---|---|
|
Tshuaj muaj pes tsawg leeg |
Calcium (Ca) Cov ntsiab lus |
28-35% |
Txiav txim siab desulfurization thiab suav nrog kev hloov kho kev ua haujlwm; Ntau dua lossis sib npaug li 30% rau siab - steel zoo |
|
Silicon (Si) Cov ntsiab lus |
55-65% |
Txhim kho lub peev xwm deoxidation thiab sib koom ua ke nrog Ca los txhim kho cov tshuaj tiv thaiv kev ruaj ntseg |
|
|
Cov impurities (C, P, S, Al) |
C Tsawg dua lossis sib npaug 0.8%, P Tsawg dua lossis sib npaug rau 0.04%, S Tsawg dua lossis sib npaug 0.02%, Al Tsawg dua lossis sib npaug 1.0% |
Zam tsis txhob ntuav ntuav (piv txwv li, Fe₃C) thiab cov teeb meem cuam tshuam; tseem ceeb rau qis- carbon steel |
|
|
Lub cev muaj zog |
Loj |
10-50mm (Ntau dua lossis sib npaug rau 90% hauv ntau) |
Xyuas kom ceev melting (1400-1500 degree) thiab uniform dispersion nyob rau hauv molten hlau |
|
Qhov ntom |
2.5-2.8g / cm³ |
Tiv thaiv kom ntab ua ntej melting; optimizes cov tshuaj tiv thaiv nrog molten steel |
|
|
Oxidation Resistance |
Nto oxide txheej tsawg dua lossis sib npaug li 0.5 hli |
Txo Ca/Si poob thaum khaws cia thiab pub mis |
Vim li cas 10-50mm Calcium Silicon Lumps Dominate Steelmaking?
Tsis zoo li ib qho - muaj nuj nqi additives (xws li,ferrosiliconrau deoxidation,calcium carbiderau desulfurization), CaSi Lumps 10-50mm integrate deoxidation, desulfurization, thiab inclusion modification-3 core functions for high-quality steel production. Lawv qhov tshwj xeeb zoo yog nthuav dav los ntawm 10-50mm loj:
Synergistic Deoxidation: Kev ua tau zoo dua li ib qho Alloys
Calcium thiab silicon nyob rau hauv lub alloy muaj zog affinities rau oxygen (tus qauv dawb zog ntawm tsim: CaO < SiO₂ < FeO ). Cov tshuaj tiv thaiv deoxidation dual tau ua raws li hauv qab no:
Cov tshuaj tiv thaiv thawj zaug:2Ca + O₂=2CaO (Ca sai sai ntes cov pa oxygen)
Cov tshuaj tiv thaiv thib ob:Si + 2FeO=SiO₂ + 2Fe (Si tshem tawm FeO seem)
Qhov loj 10-50mm ua kom cov hlau yaj hauv 2-3 feeb hauv 1550-1600℃molten pas dej ua ke, tsis txhob oxidation ntxov ntxov (cov pob me me) lossis cov tshuaj tiv thaiv tsis tiav (cov pob loj dua). Cov ntaub ntawv muaj qhia tau hais tias siv 10-50mm CaSi lumps txo molten steel oxygen cov ntsiab lus kom tsawg dua los yog sib npaug rau 0.003%, outperforming ferro silicon ib leeg (tsawg dua los yog sib npaug rau 0.005%).
Deep Desulfurization: Ua tau raws li cov qauv nruj nruj
Calcium reacts nrog leej faj nyob rau hauv molten hlau los tsim CaS ruaj khov (melting point 2450 degree), uas yog yooj yim sib cais rau hauv slag. Reaction equation: Ca + S=CaS. Lub 10-50 hli lumps 'slow, tswj melting tso cai rau Ca nkag mus rau hauv lub pas dej ua ke molten, ua tiav ib tug desulfurization tus nqi ntawm 60-80% - deb tshaj ferromanganese (30-40%).
Kev hloov pauv suav nrog: Txhim kho Steel Toughness & Weldability
Kev puas tsuaj (piv txwv li, angular Al₂O₃) hauv cov hlau txo qhov toughness thiab weldability . 10-50 hli CaSi lumps hloov cov kev suav nrog rau hauv CaO·Al₂O₃·SiO₂ complexes, uas tsis tshua muaj kev puas tsuaj rau cov hlau matrix. Rau automotive sheet hlau, qhov kev hloov kho no nce elongation los ntawm 8-12% thiab txo qhov vuam tawg ntawm 90%.
Tus nqi - Ua tau zoo & Yooj yim rau kev khiav lag luam
Lub 10-50mm loj yog sib xws nrog mainstream steelmaking feeding systems (ladle top charging, pneumatic conveying). Piv nrog rau calcium hlau (tus nqi siab- lwm tus nqi), 10-50mm lumps txo tus nqi ntxiv los ntawm 30-40% thaum tsis tas yuav muaj cov khoom siv tshwj xeeb xaim. Tsis tas li ntawd, lawv cov hmoov av tsawg tsawg ua kom yooj yim rau kev tswj hwm ib puag ncig ntawm qhov chaw.
Tej Teeb Meem & Kev daws teeb meem
|
Tej Teeb Meem |
Keeb kwm |
Kev daws teeb meem |
|---|---|---|
|
Tsawg Ca siv tus nqi |
1. Qhov loj ntawm 10-50mm ntau yam; 2. Pub ze ze rau saum npoo; 3. Molten steel kub siab dhau lawm |
1. Tshuaj ntsuam lumps ua ntej siv; 2. Siv kev txhaj tshuaj tob tob; 3. Tswj kub tsawg dua lossis sib npaug li 1600 degree |
|
Ua tsis tiav desulfurization |
1. Ca cov ntsiab lus<28%; 2. Slag Basicity (CaO/SiO₂)<3.0 |
1. Xaiv qib siab -Ca qib (30-35%); 2. Ntxiv txiv qaub los kho slag hauv paus rau 3.0-4.0 |
|
Kev suav ntau dhau |
1. Cov impurities hauv CaSi tshaj cov qauv; 2. Tsis txaus argon nplawm |
1. Yuav tsum tau muab cov ntaub ntawv soj ntsuam zoo; 2. Ntxiv argon nplawm rau 5 feeb |
10-50mm Calcium Silicon alloy yog indispensable multifunctional additives nyob rau hauv niaj hnub steelmaking, ua tsaug rau lawv synergistic deoxidation / desulfurization, suav nrog kev hloov kho, thiab cov nqi zoo. Lawv 10-50mm particle loj yog "golden specification" uas sib npaug cov tshuaj tiv thaiv kev ua haujlwm thiab kev ua haujlwm tau zoo. Los ntawm kev paub txog kev txheeb xyuas qhov tseeb, kev ua kom zoo dua qub, thiab kev xaiv cov khoom lag luam, cov neeg tsim khoom steel tuaj yeem ua kom tus nqi ntawm 10-50 hli CaSi pob los tsim cov hlau zoo. Nyob rau hauv lub caij nyoog qis-carbon, lawv cov kev hloov kho tshiab yuav txuas ntxiv mus rau kev lag luam steel txoj kev loj hlob zoo.
