Ferro Silicon le Calcium: Key Sebelisa Melemo le Likopo 

Ferro silicon le calcium — lilekane tse peli tsa mantlha tse sa bueng haholo ka litaba tsa ho etsa litšepe empa li bopa ka mokhoa o khutsitseng lithane tse ling le tse ling tsa tšepe ea boleng bo holimo, phala ea tšepe ea ductile, kapa mehala ea likoloi e thellang mehala ea sejoale-joale ea tlhahiso. Ho Inner Mongolia Xinxin Silicon Industry Co., Ltd., re fane ka bobeli ka lilemo tse fetang 14 - eseng e le thepa e ikhethileng, empa e le balekane ba nang le boenjiniere ba taolo ea tšepe. Ferro silicon le calcium ha li "deoxidize" feela. Li hlophisa ho tlosoa ha oksijene, li-nucleate graphite spheroids, li hatella likhoele tsa manganese sulfide, 'me li notlela sebabole hore e be li-inclusions tse tsitsitseng, tse globular. Ke ka lebaka leo bareki ba Shandong, Hebei, le Vietnam ba sa botseng * hore na ba li hloka - ba botsa *e leng karo-karolelano * efe, *karohano ea boholo ba mofuta ofe *, 'me u ka netefatsa ho tsitsa ha batch kapele hakae?*

Hobaneng ferro silicon le calcium li sebetsa hantle hammoho ho feta ho arohana

Standalone ferrosilicon (FeSi) e tlosa oksijene-empa e siea masala a sebabole le morphology ea ho kenyelletsa e sa lekanang. Calcium feela e fetoha mouoane ka potlako tšepeng e qhibilihisitsoeng, e fanang ka pholiso e mpe le kabo e sa tsitsang. Li kopanye e le calcium silicide (CaSi) kapa silicon-barium-calcium alloy-'me u fumana botsitso ba mocheso, li-kinetics tse laoloang, le synergistic desulfurization. Litekong tsa rona tsa liteko tsa li-pilot ladle, CaSi e kentse 0.8-1.2 kg/ton e fokolitse kakaretso ea oksijene ho tloha ho 32 ppm ho ea ho 18 ppm * le * ho fokotsa lihlahisoa tsa sebabole ka 37% khahlanong le phekolo ea FeSi-feela. Senotlolo? Calcium e fetola li-inclusions tsa alumina; silicon e boloka moea o fokotsang. Ha e sebetse hantle ntle le e 'ngoe.

Re bona sena letsatsi le letsatsi maikutlong a bareki: Setsi sa Tier-1 se Tangshan se tlohile ho FeSi + CaAl terata ho ea ho Si-Ba-Ca e neng e kentsoe pele ka mor'a ho hloleha ho pheta-pheta ha nodularity ho 40-mm ductile iron castings. Kotulo ea bona e nyolohile ho tloha ho 71% ho ea ho 94% nakong ea libeke tse peli. Hobaneng? Sebaka se tlase sa ho qhibiliha sa silicide ea calcium (985 ° C vs. 1,260 ° C bakeng sa Ca e hloekileng) e lumella hore e qhibilihe ka ho feletseng pele ho slag skimming. Likahare tsa eona tsa silicon li thibela ho tsofala ha oxidation nakong ea ho tlanya. Seo ha se khopolo-taba - ke licheso tse 237 tse latellanang tse nang le nodularity> 85% ho ASTM A536 Grade 65-45-12.

Lisebelisoa tse tharo tsa lefats'e la 'nete moo ferro silicon le calcium li etsang kapa li senyang ts'ebetso

• Ente ea ductile iron: Calcium silicide (ka tloaelo 30–33% Ca, 58–62% Si) nucleates Type I graphite spheroids at 1,420–1,450°C. Ca e nyenyane haholo → graphite ea flake; haholo → manya a calcium oxide. CaSi-30 ea rona e tloaelehileng e kopana le GB/T 20935.1-2018 'me e na le ± 0.8% mamello ho Ca content-ea bohlokoa ha tekanyo ea inoculant e le 0.12% ea boima ba ho qhibiliha.
• Ho hloekisa tšepe ea bobeli: Ka RH degassers, Si-Ba-Ca alloys e feta FeSi + CaF₂ metsoako. Barium e fokotsa tsitsipano ea holim'a metsi; calcium e lokisa sebabole; silicon e thibela ho phatloha ha slag. Moreki a le mong o ile a fokotsa tšebeliso ea argon ka 22% ka mor'a ho fetola-hobane ho phalla ha metsi ho ile ha potlakisa ntle le molumo o feteletseng oa slag.
• Ho fepa ka terata e nang le likhoele bakeng sa li-caster tse tšesaane: Mona, boholo ba likaroloana bo bohlokoa ho feta sebopeho. Re kenya CaSi ho D₅₀ = 0.85 mm-e tiileng ka ho lekaneng bakeng sa ho fepa ka terata e tsitsitseng ka 280 m/min, e mahoashe ho qoba kotsi ea ho phatloha ha lerōle. Bareki ba tlaleha 92% ea ho hlaphoheloa ha calcium vs. 68% ka li-powders tse ka tlaase ho 0.3-mm.

Seo bareki ba se hlokomolohang—’me ba se lefelle hamorao

Ba bang ba nahana hore lihlahisoa tsohle tsa ferro silicon le calcium lia fetoha. Ha ba joalo. Re lekile lihlopha tse 17 tse tsoang linaheng tse ling tsa CaSi tse tsoang lik'honthinenteng tse tharo: 4 e hlōlehile tlhahlobo ea sieve (litefiso tse feteletseng), 6 e bontšitse karohano ea Ca ka likarolo tse fapaneng, 'me 3 e na le> 0,15% phosphorus-e lekaneng ho embrittle litšepe tse tlaase tsa carbon. Liphello tsa 'nete tsa lefatše? Leloala la lipeipi le Jiangsu le ile la lahla lithane tse 112 tsa API 5L X65 kamora ho phatloha ho bakoang ke haedrojene - ho latela CaSi e nang le phosphorus e ileng ea thella ho feta QC ea bona e tlang.

Ke ka lebaka leo tiisetso ea rona ea boleng e seng lipampiri-ke fisiks. Lotho e 'ngoe le e' ngoe e etsoa tlhahlobo ea OES (Spectro MAXx), boholo ba laser diffraction sizing (Malvern Mastersizer 3000), le microscope ea sethala se chesang ho netefatsa boitšoaro ba ho qhalana ho 1,480 ° C. Re ngola sephetho se seng le se seng sa liteko — eseng feela ho feta/ho hloleha. Haeba kopo ea hau e batla <0.02% Al kapa <0.005% S, re tla arolelana faele e tala ea spectra. Ha ho mebaraka e khanyang. Lintlha feela tseo u ka li fepang ho Melt Shop MES ea hau.

Ho khetha sehlahisoa se nepahetseng ho qala ka sebōpi sa hau - eseng lethathamo la rona

Ipotse lipotso tse tharo pele u reka:

1. Boemo ba hau ba mocheso oa ladle ke bofe? Ka tlase ho 1,400°C? Khetha CaSi-28 (ka tlaase ho qhibiliha ntlha). Ka holimo ho 1,480°C? E-ea CaSi-33 bakeng sa ho qhibiliha butle le ho kenella ka botebo.
2. Sepheo sa hau sa sebabole ke sefe? >0.020%? Beha Si-Ba-Ca pele (Ba e matlafatsa bokhoni ba sulfide). <0.008%? Sebelisa terata ea CaSi + MgFe bakeng sa ho bentša ho qetela.
3. Fesetere ea hau ea thomello e thata hakae? Nako ea rona e tloaelehileng ea ho etella pele ke matsatsi a 7 FOB Tianjin. Bakeng sa litaelo tsa tšohanyetso tlas'a lihora tse 48, re tšoere 120 MT ea CaSi-30 ka setokong sa polokelo se tlanngoeng, se lekoa esale pele, se phuthetsoe esale pele, se loketse ho romelloa.

Ferro silicon le calcium ha se li-additives. Ke lisebelisoa tsa metallurgical - tse nepahetseng, tse ke keng tsa fetoloa, 'me li ke ke tsa buisanoa ka likopo tse phahameng tsa botšepehi. Ho Inner Mongolia Xinxin Silicon Industry Co., Ltd., re li tšoara ka tsela eo: ha ho na liforomo tsa setoko, ha ho lintlha tse akaretsang, ha ho likhakanyo. Li-alloys feela tse lekantsoeng ho k'hemistri ea hau, lisebelisoa tsa hau le motsoako oa sekhechana sa hau. Hobane ha mocheso oa hau o latelang o otla 1,430 ° C, ntho ea bohlokoa hase letšoao le ka mokotleng-ke hore na khalsiamo e qhibiliha * pele * mefuta ea slag, le hore na silicon e lula e sebetsa * ka mor'a * argon e khaotsa ho phalla.