Ferro Silicon thiab Calcium: Qhov Tseem Ceeb Siv Cov txiaj ntsig thiab kev siv 

Ferro silicon thiab calcium - ob lub ntsiab lus tseem ceeb uas tsis tshua muaj xov xwm steelmaking xov xwm tab sis ntsiag to zoo li txhua tuj ntawm qib siab cov qauv hlau, cov yeeb nkab hlau, los yog cov tsheb ciav hlau tawm ntawm cov kab ntau lawm niaj hnub. Ntawm Inner Mongolia Xinxin Silicon Kev Lag Luam Co., Ltd., peb tau muab ob qho tib si rau ntau tshaj 14 xyoo - tsis yog cov khoom sib cais, tab sis raws li cov neeg koom tes nrog kev sib koom tes hauv metallurgical tswj. Ferro silicon thiab calcium tsis yog "deoxidize." Lawv orchestrate tshem tawm oxygen, nucleate graphite spheroids, suppress manganese sulfide stringers, thiab kaw sulfur rau hauv ruaj khov, globular inclusions. Tias yog vim li cas cov neeg siv khoom hauv Shandong, Hebei, thiab Nyab Laj tsis nug * yog tias * lawv xav tau - lawv nug * qhov piv txwv *, * qhov loj npaum li cas *, thiab * nrawm npaum li cas koj tuaj yeem siv tau cov khoom sib xws?*

Vim li cas ferro silicon thiab calcium ua haujlwm zoo ua ke dua li sib nrug

Standalone ferrosilicon (FeSi) tshem tawm cov pa oxygen - tab sis tawm hauv qab cov sulfur residual thiab tsis sib xws morphology. Calcium ib leeg vaporizes sai heev nyob rau hauv molten steel, muab kev rov qab tsis zoo thiab kev faib tawm tsis sib xws. Muab lawv ua calcium silicide (CaSi) los yog silicon-barium-calcium alloy - thiab koj tau txais thermal stability, tswj kev tso tawm kinetics, thiab synergistic desulfurization. Hauv peb cov nroj tsuag kev sim ladle sim, CaSi ntxiv ntawm 0.8-1.2 kg / tuj txo cov pa oxygen tag nrho los ntawm 32 ppm rau 18 ppm * thiab * txiav cov ntsiab lus sulfur los ntawm 37% piv rau FeSi-tsuas yog kev kho mob. Tus yuam sij? Calcium hloov kho alumina suav nrog; silicon sustains qhov txo qhov cua. Tsis ua haujlwm zoo yam tsis muaj lwm tus.

Peb pom qhov no txhua hnub hauv cov neeg siv khoom tawm tswv yim: A Tier-1 foundry hauv Tangshan hloov los ntawm FeSi + CaAl xaim mus rau pre-alloyed Si-Ba-Ca tom qab rov ua qhov nodularity tsis ua tiav hauv 40-mm ductile hlau castings. Lawv cov txiaj ntsig tau dhia los ntawm 71% mus rau 94% hauv ob lub lis piam. Vim li cas? Calcium silicide qhov qis melting point (985 ° C vs. 1,260 ° C rau ntshiab Ca) cia nws yaj tag nrho ua ntej slag skimming. Nws cov ntsiab lus silicon buffers tiv thaiv reoxidation thaum tapping. Qhov ntawd tsis yog txoj kev xav-uas yog 237 sib law liag nrog nodularity> 85% ntawm ASTM A536 Qib 65-45-12.

Peb daim ntawv thov tiag tiag hauv ntiaj teb qhov twg ferro silicon thiab calcium ua los yog tawg ua haujlwm

• Iron Inoculation: Calcium silicide (feem ntau 30–33% Ca, 58–62% Si) nucleates Hom I graphite spheroids ntawm 1,420–1,450 ° C. Tsawg dhau Ca → flake graphite; ntau dhau → calcium oxide dross. Peb tus qauv CaSi-30 ua tau raws li GB / T 20935.1-2018 thiab tuav ± 0.8% kam rau ntawm Ca cov ntsiab lus - qhov tseem ceeb thaum noj tshuaj tsis haum yog 0.12% ntawm qhov hnyav yaj.
• Secondary steel refining: Hauv RH degassers, Si-Ba-Ca alloys ua tau zoo tshaj FeSi + CaF₂ blends. Barium txo qis qhov nro; calcium kho sulfur; silicon tiv thaiv slag foaming. Ib tus neeg siv khoom txo qis argon noj los ntawm 22% tom qab hloov pauv-vim suav nrog flotation nrawm dua yam tsis muaj qhov ntim ntau dhau.
• Cored hlau pub rau nyias-slab casters: Ntawm no, particle loj tseem ceeb tshaj qhov muaj pes tsawg leeg. Peb muab CaSi rau D₅₀ = 0.85 mm-nruj txaus rau kev ruaj ntseg hlau noj ntawm 280 m / min, ntxhib txaus kom tsis txhob muaj plua plav tawg. Cov neeg siv khoom qhia txog 92% calcium rov qab vs. 68% nrog sub-0.3-mm hmoov.

Dab tsi buyers overlook - thiab them rau tom qab

Qee tus xav tias tag nrho cov khoom siv ferro silicon thiab calcium sib hloov tau. Lawv tsis yog. Peb tau sim 17 cov khoom siv CaSi tuaj txawv teb chaws los ntawm peb lub teb chaws: 4 qhov kev soj ntsuam ua tsis tiav (cov nplua nplua), 6 tau pom CaS sib cais hauv ntu ntu, thiab 3 muaj> 0.15% phosphorus - txaus rau embrittle low-carbon steels. Qhov tshwm sim tiag tiag hauv ntiaj teb? Cov yeeb nkab zeb hauv Jiangsu tau muab pov tseg 112 tons ntawm API 5L X65 tom qab hydrogen-induced cracking-traced rau phosphorus-nplua nuj CaSi uas plam dhau lawv QC tuaj.

Tias yog vim li cas peb qhov kev lees paub zoo tsis yog cov ntaub ntawv-nws yog physics. Txhua qhov ntau dhau los ntawm OES tsom xam (Spectro MAXx), laser diffraction sizing (Malvern Mastersizer 3000), thiab kub-theem microscopy los xyuas kom meej tus cwj pwm dissolution ntawm 1,480 ° C. Peb teev txhua qhov kev xeem - tsis yog dhau / ua tsis tiav. Yog tias koj daim ntawv thov xav tau <0.02% Al lossis <0.005% S, peb yuav muab cov ntaub ntawv nyoos spectra. Tsis muaj kev lag luam gloss. Tsuas yog cov ntaub ntawv koj tuaj yeem pub rau hauv koj lub khw Melt MES.

Xaiv cov khoom tsim nyog pib nrog koj lub qhov cub-tsis yog peb phau ntawv teev npe

Nug koj tus kheej peb cov lus nug ua ntej xaj:

1. Koj tus ladle kub profile yog dab tsi? Hauv qab 1,400 ° C? Xaiv CaSi-28 (qis melting point). Tshaj 1,480 ° C? Mus CaSi-33 kom qeeb qeeb thiab nkag mus tob.
2. Koj lub hom phiaj sulfur yog dab tsi? > 0.020%? Ua ntej Si-Ba-Ca (Ba txhim khu kev muaj peev xwm sulfide). <0.008%? Siv CaSi + MgFe cored hlau rau polishing kawg.
3. Koj lub qhov rais xa khoom nruj npaum li cas? Peb lub sij hawm ua tus qauv yog 7 hnub FOB Tianjin. Rau kev txiav txim thaum muaj xwm txheej nyob rau hauv 48 teev, peb tuav 120 MT ntawm CaSi-30 nyob rau hauv daim ntawv cog lus warehouse stock-pre-tested, pre-packaged, npaj rau lub thawv loading.

Ferro silicon thiab calcium tsis yog additives. Lawv yog metallurgical levers-precise, irreversible, thiab tsis-negotiable nyob rau hauv high-kev ncaj ncees daim ntawv thov. Ntawm Inner Mongolia Xinxin Silicon Industry Co., Ltd., peb kho lawv li ntawd: tsis muaj qauv qauv, tsis muaj generic specs, tsis muaj kev xav. Tsuas yog cov alloys calibrated rau koj cov chemistry, koj cov khoom siv, thiab koj cov khoom seem. Vim tias thaum koj cov cua kub tom ntej no mus txog 1,430 ° C, qhov tseem ceeb tsis yog daim ntawv lo ntawm lub hnab - nws yog seb cov calcium yaj * ua ntej * cov ntawv slag, thiab seb cov silicon nyob twj ywm * tom qab * argon nres bubbling.