Ferro Silicon da Calcium: Maɓalli na Amfani da Fa'idodi da Aikace-aikace 

Ferro silicon da alli - abokan haɗin gwiwa biyu na asali waɗanda ba safai suke yin kanun labarai na ƙarfe ba amma suna yin shuru suna siffata kowane ton na babban tsarin ƙarfe, bututun ƙarfe, ko simintin simintin gyare-gyaren motoci da ke birgima daga layin samarwa na zamani. A Inner Mongolia Xinxin Silicon Industry Co., Ltd., mun samar da duka sama da shekaru 14-ba a matsayin keɓaɓɓen kayayyaki ba, amma a matsayin abokan haɗin gwiwar injiniyoyi masu inganci a cikin sarrafa ƙarfe. Ferro silicon da calcium ba kawai "deoxidize" ba. Suna tsara kawar da iskar oxygen, spheroids nucleate graphite spheroids, kashe kirtani sulfide na manganese, da kulle sulfur cikin barga, haɗaɗɗen duniya. Abin da ya sa abokan ciniki a Shandong, Hebei, da Vietnam ba sa tambayar * idan * suna buƙatar su - suna tambayar * wanne rabo *, * menene girman ƙwayar *, da * yaya zaku iya tabbatar da daidaiton tsari?*

Me yasa ferro silicon da alli suna aiki mafi kyau tare fiye da baya

Standalone ferrosilicon (FeSi) yana kawar da iskar oxygen-amma ya bar baya da ragowar sulfur da rashin daidaituwa a cikin ilimin halittar jiki. Calcium kadai yana yin tururi da sauri a cikin narkakkar karfe, yana ba da murmurewa mara kyau da rarraba mara daidaituwa. Haɗa su azaman siliki silicide (CaSi) ko silicon-barium-calcium alloy-kuma kuna samun kwanciyar hankali na thermal, sarrafawar sakin motsi, da lalatawar haɗin gwiwa. A cikin gwajin ladle na matukin mu na shuka, CaSi ya ƙara a 0.8 – 1.2 kg/ton ya rage jimlar iskar oxygen daga 32 ppm zuwa 18 ppm * kuma * yanke abun ciki na sulfur da 37% tare da jiyya na FeSi-kawai. Makullin? Calcium yana canza abubuwan haɗin alumina; silicon yana kiyaye yanayin ragewa. Dukansu baya aiki da kyau ba tare da ɗayan ba.

Muna ganin wannan kullun a cikin ra'ayoyin abokin ciniki: Tier-1 da aka samo a Tangshan ya canza daga FeSi + CaAl waya zuwa Si-Ba-Ca da aka riga aka yi bayan gazawar nodularity a cikin simintin ƙarfe na 40-mm ductile. Yawan amfanin su ya tashi daga 71% zuwa 94% cikin makonni biyu. Me yasa? Calcium silicide's ƙananan narkewa (985°C vs. 1,260°C don tsantsar Ca) yana ƙyale shi ya narke gabaɗaya kafin skimming. Abubuwan da ke cikin silikinsa yana hana sake yin oxidation yayin bugawa. Wannan ba ka'idar ba - wannan shine 237 a jere heats tare da nodularity> 85% akan ASTM A536 Grade 65-45-12.

Aikace-aikace na ainihi guda uku inda ferro silicon da calcium ke yin ko karya aiki

• Alurar rigakafin baƙin ƙarfe: Calcium silicide (yawanci 30-33% Ca, 58-62% Si) yana lalata nau'in nau'in graphite spheroids a 1,420-1,450 ° C. Dan kadan Ca → graphite flake; yayi yawa → dattin calcium oxide. Madaidaicin mu CaSi-30 ya hadu da GB/T 20935.1-2018 kuma yana riƙe da ± 0.8% haƙuri akan abun ciki na Ca-mahimmanci lokacin da adadin inoculant shine 0.12% na narke nauyi.
• Na biyu karfe tace: A cikin masu rarraba RH, Si-Ba-Ca alloys sun fi FeSi + CaF₂ gauraye. Barium yana rage tashin hankali; calcium yana gyara sulfur; silicon hana slag kumfa. Abokin ciniki ɗaya ya rage yawan amfani da argon da kashi 22% bayan sauyawa-saboda haɗa ruwa cikin sauri ba tare da ƙarar ƙarar slag ba.
• Ciyarwar waya mai ƙira don simintin siminti-slab: Anan, girman barbashi yana da mahimmanci fiye da abun da ke ciki. Muna niƙa CaSi zuwa D₅₀ = 0.85 mm - madaidaicin isasshe don ingantaccen ciyarwar waya a 280 m/min, m isa don guje wa haɗarin fashewar ƙura. Abokan ciniki sun ba da rahoton 92% dawo da calcium vs. 68% tare da ƙananan foda-0.3-mm.

Abin da masu saye ke kau da kai - kuma su biya daga baya

Wasu suna ɗauka cewa duk samfuran siliki na ferro da samfuran calcium suna musanya su. Ba su ba. Mun gwada batches na CaSi guda 17 da aka shigo da su daga nahiyoyi uku: 4 gazawar bincike na sieve (cirar tara kuɗi), 6 ya nuna rarrabuwar ca a cikin sassan giciye, kuma 3 ya ƙunshi> 0.15% phosphorus-isa ya isa ya ƙwanƙwasa ƙananan ƙarfe na carbon. Sakamakon hakikanin duniya? Wani injin bututu a Jiangsu ya kwashe tan 112 na API 5L X65 bayan fashewar hydrogen-wanda aka gano zuwa CaSi mai arzikin phosphorus wanda ya wuce QC mai shigowa.

Shi ya sa tabbacin ingancin mu ba takarda ba ne - kimiyyar lissafi ne. Kowane kuri'a yana jure wa binciken OES (Spectro MAXx), girman diffraction Laser (Malvern Mastersizer 3000), da ma'aunin zafi-mataki don tabbatar da halayen rushewa a 1,480°C. Muna shiga kowane sakamakon gwaji-ba kawai wucewa/ gaza ba. Idan aikace-aikacenku yana buƙatar <0.02% Al ko <0.005% S, za mu raba ɗanyen fayil ɗin sikirin. Babu mai sheki na talla. Bayanan da za ku iya ciyarwa a cikin Melt Shop MES.

Zaɓin samfurin da ya dace yana farawa da tanderun ku-ba kundin mu ba

Tambayi kanka tambayoyi uku kafin yin oda:

1. Menene bayanin martabar ladle ɗin ku? Kasa da 1,400°C? Zaɓi CaSi-28 (ƙananan wurin narkewa). Sama da 1,480°C? Tafi CaSi-33 don narkewa a hankali da zurfin shiga.
2. Menene burin ku na sulfur? > 0.020%? Ba da fifikon Si-Ba-Ca (Ba yana haɓaka ƙarfin sulfide). <0.008%? Yi amfani da CaSi + MgFe cored waya don gogewa ta ƙarshe.
3. Yaya matsewar taga isar ku? Madaidaicin lokacin jagorarmu shine kwanaki 7 FOB Tianjin. Don umarni na gaggawa a ƙarƙashin sa'o'i 48, muna riƙe 120 MT na CaSi-30 a cikin haƙƙin sito-wanda aka riga aka gwada, riga-kafi, shirye don ɗaukar kaya.

Ferro silicon da calcium ba ƙari ba ne. Levers ne na ƙarfe-madaidaici, ba za a iya jujjuya su ba, kuma ba za a iya sasantawa ba a cikin manyan aikace-aikace masu inganci. A Inner Mongolia Xinxin Silicon Industry Co., Ltd., muna bi da su haka: babu dabarar hannun jari, babu cikakkun bayanai dalla-dalla, babu zato. Kawai allunan da aka daidaita su zuwa sinadarai, kayan aikin ku, da gauran tarkacen ku. Domin lokacin da zafin ku na gaba ya kai 1,430 ° C, abin da ke da muhimmanci ba shine lakabin da ke cikin jakar ba - shine ko calcium ya narke * kafin * nau'in slag, kuma ko silicon ya tsaya aiki * bayan * argon ya daina kumfa.