I-Ferro Silicon neCalcium: Izinzuzo Zokusebenzisa Okubalulekile Nezicelo 

I-Ferro silicon ne-calcium—amadlelandawonye amabili ayisisekelo angavamisile ukuba sematheni wezindaba zokwenza insimbi kodwa alolonge buthule yonke ithani lensimbi yesakhiwo sezinga eliphezulu, ipayipi lensimbi edonsayo, noma ukujikijelwa kwezimoto emigqeni yokukhiqiza yesimanje. Kwa-Inner Mongolia Xinxin Silicon Industry Co., Ltd., sikunikeze kokubili iminyaka engaphezu kwengu-14—hhayi njengempahla ehlukile, kodwa njengozakwethu abaklanywe ukunemba ekulawuleni insimbi. I-Ferro silicon ne-calcium ayigcini nje “i-deoxidize.” Bahlela ukukhishwa komoya-mpilo, i-nucleate graphite spheroids, bacindezela izintambo ze-manganese sulfide, futhi bakhiye isibabule sibe yizimbotshana ezizinzile, eziyimbulunga. Yingakho amakhasimende e-Shandong, e-Hebei, nase-Vietnam engabuzi ukuthi *ingabe* ayawadinga—abuza ukuthi *yisiphi isilinganiso*, *muphi usayizi wezinhlayiyana*, futhi *ungaqinisekisa ngokushesha kangakanani ukuvumelana kweqoqo?*

Kungani i-ferro silicon ne-calcium zisebenza kangcono kunokuhlukana

I-Standalone ferrosilicon (FeSi) isusa umoya-mpilo—kodwa ishiya isibabule esisele kanye ne-morphology yokufakwa engalingani. I-calcium iyodwa ihwamuka ngokushesha kakhulu ensimbi encibilikisiwe, inikeze ukululama okungekuhle kanye nokusatshalaliswa okungaguquki. Zihlanganise njenge-calcium silicide (CaSi) noma i-silicon-barium-calcium alloy—futhi uthola ukuzinza okushisayo, ama-kinetics okukhululwa okulawulwayo, kanye ne-synergistic desulfurization. Ezivivinyweni zokuhlola i-pilot ladle yesitshalo sethu, i-CaSi yengeze ku-0.8–1.2 kg/ton yehlise umoya-mpilo ophelele ukusuka ku-32 ppm kuya ku-18 ppm *futhi* yehlisa okuqukethwe kwesibabule ngo-37% uma kuqhathaniswa nokwelashwa kwe-FeSi kuphela. Isihluthulelo? I-calcium iguqula i-alumina inclusions; i-silicon igcina umoya onciphisayo. Ayikho enye esebenza kahle ngaphandle kokunye.

Lokhu sikubona nsuku zonke empendulweni yekhasimende: I-Tier-1 foundry e-Tangshan ishintshe isuka kuntambo ye-FeSi + CaAl yaya e-Si-Ba-Ca efakwe ngaphambili ngemva kokuhluleka okuphindaphindiwe kwe-nodularity ekufakweni kwensimbi eyi-40-mm ductile iron. Isivuno sabo sehle sisuka ku-71% saya ku-94% emasontweni amabili. Kungani? Indawo encibilikayo ye-calcium silicide (985°C vs. 1,260°C ye-Ca emsulwa) iyivumela incibilike ngokugcwele ngaphambi kokushushuluza nge-slag. Okuqukethwe kwayo kwe-silicon kuvimbela i-reoxidation ngesikhathi sokuthepha. Lokho akuwona umbono—lokho ukushisa okulandelanayo okungama-237 nge-nodularity> 85% ku-ASTM A536 Ibanga 65-45-12.

Izinhlelo zokusebenza ezintathu zomhlaba wangempela lapho i-ferro silicon ne-calcium yenza noma yephula ukusebenza

• I-Ductile iron inoculation: I-calcium silicide (imvamisa engu-30–33% Ca, 58–62% Si) i-nucleates Uhlobo lwe-graphite spheroids ku-1,420–1,450°C. I-Ca encane kakhulu → i-flake graphite; kakhulu → ingcekeza ye-calcium oxide. I-CaSi-30 yethu evamile ihlangabezana ne-GB/T 20935.1–2018 futhi ibamba ±0.8% ukubekezelela kokuqukethwe kwe-Ca—okubalulekile lapho umthamo we-inoculant ungu-0.12% wesisindo esincibilikayo.
• Ukucwenga insimbi yesibili: Kuma-degasser e-RH, ama-alloys e-Si-Ba-Ca adlula ama-FeSi + CaF₂ ama-blends. I-Barium yehlisa ukungezwani kwendawo; i-calcium ilungisa isulfure; i-silicon ivimbela ukuqubuka kwe-slag. Ikhasimende elilodwa lehlise ukusetshenziswa kwe-argon ngo-22% ngemva kokushintsha—ngoba ukufakwa kwe-flotation kwashesha ngaphandle kwevolumu ye-slag eyeqile.
• Ukuphakelwa ngocingo olunezintambo kwabakhangisi be-slab abancane: Lapha, usayizi wezinhlayiyana ubaluleke ngaphezu kokwakheka. Sihambisa i-CaSi kuya ku-D₅₀ = 0.85 mm—iqine ngokwanele ukuphakela ucingo oluzinzile ngo-280 m/min, imahhadlahhadla ngokwanele ukugwema ingozi yokuqhuma kothuli. Amakhasimende abika ukutholwa kwe-calcium okungu-92% vs. 68% ngezimpushana ezingaphansi kwe-0.3-mm.

Lokho abathengi abangakunakiyo—futhi bakhokhele kamuva

Abanye bacabanga ukuthi yonke imikhiqizo ye-ferro silicon ne-calcium iyashintshana. Abekho. Sihlole amaqoqo e-CaSi angenisiwe angu-17 avela kumazwekazi amathathu: ukuhlaziya oku-4 okuhlulekile (izinhlawulo ezeqile), u-6 wabonisa ukuhlukaniswa kwe-Ca ngezigaba ezihlukene, futhi u-3 aqukethe > 0.15% we-phosphorus—eyanele ukuvala izinsimbi ezinekhabhoni ephansi. Umphumela womhlaba wangempela? Umshini wokugaya amapayipi e-Jiangsu ulahle amathani angu-112 e-API 5L X65 ngemva kokuqhekeka okubangelwa i-hydrogen—okulandelelwa ku-CaSi ecebile nge-phosphorus eye yashelela yadlula i-QC yabo engenayo.

Yingakho ukuqinisekiswa kwekhwalithi yethu kungewona amaphepha-kuyi-physics. Yonke indawo ihlaziywa i-OES (Spectro MAXx), i-laser diffraction sizing (Malvern Mastersizer 3000), kanye ne-hot-stage microscopy ukuze kuqinisekiswe ukuziphatha kokuncibilika ku-1,480°C. Sibhala yonke imiphumela yokuhlolwa—hhayi nje ukuphasa/ukufeyila. Uma uhlelo lwakho lokusebenza ludinga u-<0.02% Al noma u-<0.005% S, sizokwabelana ngefayela le-spectra eluhlaza. Ayikho isicwebezelisi sokumaketha. Idatha nje ongayidlulisela ku-Melt Shop yakho ye-MES.

Ukukhetha umkhiqizo ofanele kuqala ngesithando somlilo sakho—hhayi ikhathalogi yethu

Zibuze imibuzo emithathu ngaphambi koku-oda:

1. Ithini iphrofayela yakho yezinga lokushisa le-ladle? Ngaphansi kuka-1,400°C? Khetha i-CaSi-28 (iphoyinti elincibilikayo eliphansi). Ngaphezu kuka-1,480°C? Hamba ku-CaSi-33 ukuze uthole ukuqedwa okuhamba kancane kanye nokungena okujulile.
2. Iyini inhloso yakho yesibabule? >0.020% Beka phambili i-Si-Ba-Ca (i-Ba ithuthukisa umthamo we-sulfide). <0.008% Sebenzisa i-CaSi + MgFe cored wire ukuze upholise okokugcina.
3. Liqine kangakanani iwindi lakho lokulethwa? Isikhathi sethu sokuhola esijwayelekile izinsuku eziyi-7 ze-FOB Tianjin. Ngama-oda ezimo eziphuthumayo angaphansi kwamahora angu-48, sibamba u-120 MT we-CaSi-30 esitokweni sempahla esiboshiwe—ihlolwe kusengaphambili, yapakishwa kusengaphambili, ilungele ukulayishwa esitsheni.

I-Ferro silicon ne-calcium akuzona izithasiselo. Ziyizinsimbi ze-metallurgical—ezinembile, azikwazi ukuhlehliswa, futhi okungaxoxiswana ngazo ezinhlelweni zobuqotho obuphezulu. Kwa-Inner Mongolia Xinxin Silicon Industry Co., Ltd., sibaphatha ngaleyo ndlela: awekho amafomula esitoko, awekho ama-generic specs, akukho ukuqagela. Ama-alloys nje alinganiswe kukhemistri yakho, okokusebenza kwakho, kanye nengxube ye-scrap yakho. Ngoba uma ukushisa kwakho okulandelayo kufinyelela ku-1,430°C, okubalulekile akuyona ilebula esesikhwameni—ukuthi i-calcium iyancibilika yini *ngaphambi* kokwakheka kwe-slag, nokuthi ingabe i-silicon ihlala isebenza *ngemuva* kokuthi i-argon iyeke ukubhavumula.