Ferro Silicon ndi Calcium: Zofunikira Zogwiritsa Ntchito Ubwino ndi Ntchito 

Ferro silicon ndi kashiamu—awiri ogwirizana omwe samakonda kukhala pamutu pa nkhani zopanga zitsulo koma amaumba mwakachetechete matani aliwonse achitsulo chapamwamba kwambiri, chitoliro chachitsulo cha ductile, kapena mizere yamagalimoto yothamangitsidwa pamizere yamakono. Ku Inner Mongolia Xinxin Silicon Industry Co., Ltd., tapereka zonse ziwiri kwa zaka 14—osati ngati zinthu zapayekha, koma monga othandizana ndi akatswiri owongolera zitsulo. Silicon ya Ferro ndi calcium "samangochotsa" deoxidize. Amapanga kuchotsa okosijeni, ma nucleate graphite spheroids, kupondereza zingwe za manganese sulfide, ndi kutsekera sulfure m'malo okhazikika, ozungulira. Ndicho chifukwa chake makasitomala ku Shandong, Hebei, ndi Vietnam samafunsa kuti * ngati * akuwafuna - amafunsa * kuti ndi chiŵerengero chiti *, * kukula kwake kwa tinthu tating'ono *, ndipo *mungatsimikizire bwanji kusasinthasintha kwa batch?*

Chifukwa chiyani ferro silicon ndi calcium zimagwirira ntchito limodzi bwino kuposa padera

Standalone ferrosilicon (FeSi) imachotsa mpweya-koma imasiya sulfure yotsalira ndi morphology yosakanikirana. Calcium yokha imasungunuka mwachangu muzitsulo zosungunula, zomwe zimapatsa kuchira bwino komanso kugawa kosakhazikika. Aphatikize ngati calcium silicide (CaSi) kapena silicon-barium-calcium alloy-ndipo mumapeza kukhazikika kwa kutentha, kumasulidwa kwa kinetics, ndi synergistic desulfurization. M'mayesero athu oyendetsa ndege, CaSi anawonjezera pa 0.8-1.2 kg / tani inachepetsa mpweya wokwanira kuchoka ku 32 ppm kufika ku 18 ppm * ndi * kudula sulfure ndi 37% motsutsana ndi mankhwala a FeSi-okha. Mfungulo yake? Calcium imasintha alumina inclusions; silicon imathandizira kuchepetsa mpweya. Palibe chomwe chimagwira ntchito bwino popanda china.

Timawona izi tsiku ndi tsiku pamayankho amakasitomala: Malo oyambira a Tier-1 ku Tangshan adasintha kuchokera ku waya wa FeSi + CaAl kupita ku Si-Ba-Ca wolumikizidwa kale ndi kulephera kwa nodularity mobwerezabwereza mu 40-mm ductile iron castings. Zokolola zawo zidakwera kuchokera pa 71% mpaka 94% mkati mwa milungu iwiri. Chifukwa chiyani? Malo osungunuka a Calcium silicide (985 ° C vs. 1,260 ° C kwa Ca woyera) amalola kuti asungunuke mokwanira asanathamangire slag. Zomwe zili mu silicon zimabisala motsutsana ndi reoxidation panthawi yogogoda. Imeneyo si nthano-ndiko kutenthetsa motsatizana 237 ndi nodularity> 85% pa ASTM A536 Giredi 65-45-12.

Ntchito zitatu zenizeni padziko lapansi pomwe ferro silicon ndi calcium imapanga kapena kuswa magwiridwe antchito

• ductile iron inoculation: Calcium silicide (kawirikawiri 30-33% Ca, 58–62% Si) ndi nucleates Type I graphite spheroids pa 1,420-1,450°C. Ca pang'ono kwambiri → flake graphite; kwambiri → dothi la calcium oxide. CaSi-30 yathu yokhazikika ikukumana ndi GB/T 20935.1-2018 ndipo imakhala ndi ± 0.8% kulolerana pa Ca content-yovuta pamene inoculant mlingo ndi 0.12% ya kulemera kwa sungunuka.
• Sekondale zitsulo kuyenga: Mu RH degassers, Si-Ba-Ca alloys kuposa FeSi + CaF₂ blends. Barium amachepetsa kuthamanga kwapamwamba; calcium imakonza sulfure; silicon imalepheretsa kutulutsa thovu. Makasitomala m'modzi adachepetsa kugwiritsidwa ntchito kwa argon ndi 22% atasintha - chifukwa kuphatikiza kuyandama kumathamanga popanda kuchuluka kwa slag.
• Kudyetsera mawaya amiyala kwa oponya ma slab woonda: Apa, kukula kwa tinthu kofunika kwambiri kuposa kupanga. Timayika CaSi kupita ku D₅₀ = 0.85 mm—yolimba mokwanira kuti mawaya azidya mokhazikika pa 280 m/min, okhuthala mokwanira kupeŵa chiwopsezo cha kuphulika kwa fumbi. Makasitomala amafotokoza 92% calcium kuchira vs. 68% ndi sub-0.3-mm ufa.

Zomwe ogula amanyalanyaza - ndikulipira pambuyo pake

Ena amaganiza kuti zinthu zonse za ferro silicon ndi calcium zimatha kusinthana. Iwo sali. Tayesa magulu a 17 ochokera kunja kwa CaSi kuchokera ku makontinenti atatu: 4 inalephera kusanthula sieve (chindapusa chowonjezera), 6 inasonyeza Ca kugawanika m'zigawo zodutsa, ndipo 3 ili ndi> 0,15% phosphorous-yokwanira kuti iwononge zitsulo za carbon low. Zotsatira zadziko lenileni? Mphero ya chitoliro ku Jiangsu idataya matani 112 a API 5L X65 pambuyo pakusweka kopangidwa ndi haidrojeni-kutengera CaSi yokhala ndi phosphorous yomwe idatsika kudutsa QC yawo yomwe ikubwera.

Ndicho chifukwa chake chitsimikizo chathu cha khalidwe si zolemba - ndi physics. Chigawo chilichonse chimayesedwa ndi OES (Spectro MAXx), laser diffraction sizing (Malvern Mastersizer 3000), ndi maikroskopi yotentha kuti atsimikizire kusintha kwa 1,480 ° C. Timalemba zotsatira zonse zoyesa-osati kungopambana/kulephera. Ngati pulogalamu yanu ikufuna <0.02% Al kapena <0.005% S, tidzagawana fayilo yachiwonetsero. Palibe gloss yotsatsa. Zomwe mungadyetse mu Melt Shop MES yanu.

Kusankha zinthu zoyenera kumayamba ndi ng'anjo yanu, osati mndandanda wathu

Dzifunseni mafunso atatu musanayitanitsa:

1. Kodi kutentha kwanu kwa ladle ndi kotani? Pansi pa 1,400 ° C? Sankhani CaSi-28 (malo osungunuka otsika). Pamwamba pa 1,480°C? Pitani ku CaSi-33 kuti musungunuke pang'onopang'ono komanso kulowa mozama.
2. Kodi cholinga chanu cha sulfure ndi chiyani? > 0.020% Ikani patsogolo Si-Ba-Ca (Ba imawonjezera mphamvu ya sulfide). <0.008% Gwiritsani ntchito waya wa CaSi + MgFe popukuta komaliza.
3. Kodi zenera lanu lotumizira ndi lothina bwanji? Nthawi yathu yotsogolera ndi masiku 7 FOB Tianjin. Pazinthu zadzidzidzi zosakwana maola 48, timakhala ndi 120 MT ya CaSi-30 m'nyumba yosungiramo zinthu zomangika - zoyesedwa kale, zopakidwatu, zokonzeka kutsitsa.

Ferro silicon ndi calcium sizowonjezera. Ndizitsulo zazitsulo-zolondola, zosasinthika, komanso zosakambitsirana pakugwiritsa ntchito kukhulupirika kwambiri. Ku Inner Mongolia Xinxin Silicon Industry Co., Ltd., timawachitira motere: palibe mafomula, palibe ma generic, palibe zongoganiza. Ma alloys amangosinthidwa ku chemistry yanu, zida zanu, ndi kusakaniza kwanu. Chifukwa pamene kutentha kwanu kwina kugunda 1,430 ° C, chofunika si chizindikiro pa thumba-ndikuti ngati calcium imasungunuka * pamaso pa * mawonekedwe a slag, komanso ngati silicon imakhalabe yogwira * pambuyo * argon imasiya kuphulika.