Calcium Silicon 60 30 Alloy for Steelmaking Deoxidation and Inclusion Control 

Calcium silicon 60 30 imapereka kuwongolera bwino kwa deoxidation ndi kuphatikizika mukupanga zitsulo zamakono-makamaka muzitsulo zamapangidwe apamwamba kwambiri, magiredi a mapaipi, ndi pepala lamagalimoto. Tapereka aloyiyi ku mbewu 12 za EAF ndi BOF kudutsa China ndi Southeast Asia m'miyezi 18 yapitayi. Muzochitika zonse, ogwiritsa ntchito adanenanso kumveka bwino kwa slag, kutsika kwa mpweya wotsalira (0.0018-0.0024 wt%), ndi kusintha koyezeka kwa akupanga kuyezetsa kutsika kwamitengo yamagawo akuda.

Chifukwa chiyani Calcium Silicon 60 30 Imaposa Ma Aloyi a CaSi a Generic

Sikuti ma aloyi onse a calcium silicon amachita chimodzimodzi muzitsulo zazitsulo. Mawu akuti "60 30" amatanthauza zochepera zotsimikizika: 60% Si ndi 30% Ca kulemera kwake. Chiŵerengero chimenecho chimakhala chofunika-osati ngati chizindikiro cha malonda, koma ngati nangula wa thermodynamic. Pa 60% Si, aloyi imakhalabe yokhazikika panthawi yodyetsa; pansi pa 58%, imakonda kusweka pamawaya opangidwa ndi waya. Pa 30% Ca, dissolution kinetics imagwirizana ndi mbiri ya argon-stirring mu 80-120 ton ladles. Tidayesa magulu asanu ndi awiri a malonda a CaSi mbali ndi mbali: okhawo omwe adakumana ndi mafotokozedwe onsewa adakwanitsa kuchira kwa Ca kuposa 62%.

Kuwongolera zonyansa kumalekanitsa magwiridwe antchito ndi osalimba. Silicon yathu ya calcium 60 30 imakhala ndi Al ≤0.3%, S ≤0.03%, ndi P ≤0.025%. N’chifukwa chiyani zimenezi zili zofunika? Aluminiyamu imapanga otsika osungunuka Al₂O₃-CaO spinels yomwe imatseka ma nozzles a tundish. Sulfure imawononga mphamvu ya calcium yopanga sulfide. Makasitomala m'modzi ku Guangdong adachepetsa kutseka kwa nozzles ndi 74% atasintha kuchoka pa 28% Ca batch yokhala ndi 0.52% Al kupita ku 60 30 giredi yathu yovomerezeka.

Izi sizongoyerekeza. Imayesedwa mu data ya tundish, mamapu ophatikizika kuchokera ku kusanthula kwa SEM-EDS, ndi malipoti a zokolola za mphero. Calcium silicon 60 30 sikuti imangochotsa mpweya - imapanganso morphology yophatikizika. Globular CaS ndi ma aluminiyamu a calcium m'malo mwa magulu akuthwa akuthwa a aluminiyamu. Kusintha kumeneku kumathandizira mwachindunji ductility pa -40 ° C ndi moyo wotopa mu zigawo zozizira.

Kumene Standard CaSi Imalephera-ndi Momwe 60 30 Imakonzera

Ena anganene kuti 25-28% ya CaSi yotsika mtengo imagwira ntchito bwino pakuchepetsa thupi. Koma muzochita, masukulu amenewo amakakamiza kusinthanitsa. Kuchepa kwa kashiamu kumafuna kuchuluka kowonjezera-kuwonjezera kuchuluka kwa slag, kukweza mavalidwe osagwirizana, komanso kutentha kwa ladle. Wopanga zitsulo m'modzi adawonjezera 1.8 kg / tani ya 26% CaSi kuti igunde [O]; kusinthira ku calcium silicon 60 30 odulidwa mlingo kufika 1.1 kg/tani pamene kusintha Ca kuchira ndi 19 peresenti.

Mtengo weniweni si aloyi-ndi kutsika kwapansi. Masamba a CaSi ocheperako amasungunuka mpweya wokwanira. CaSi yochuluka kwambiri imapanga zida za CaS zochulukira. Palibe mawonekedwe omwe amadutsa ASTM A1019 kapena EN 10228-2 zofunikira pakuphatikizidwa kwa mbale yokakamiza. Gulu lathu la 60 30 likugunda zenera lopapatiza pomwe zochitika za Ca ndizokwanira kusintha ma inclusions *popanda* kudzaza kusungunuka. Mayesero a labu amawonetsa zotsatira zabwino kwambiri pa 0.0025–0.0032% Ca yosungunuka—ingathe kutheka kokha ndi kulamulira kolimba kwa kapangidwe kake ndi mpweya wochepa (<15 cm³/100g).

Timayesa kutentha kulikonse kwa haidrojeni, nayitrogeni, ndi mpweya pogwiritsa ntchito kuphatikizika kwa mpweya wa inert (Leco ONH-836). Palibe zombo zamagulu zopanda satifiketi yowunikira - kuphatikiza Ca, Si, Al, S, P, ndi Mg yotsalira. Makasitomala amatiuza kuti kufufuzaku kumachepetsa nthawi yawo ya QA mkati mwa theka pamene akuyenerera kutentha kwatsopano kwa zida zanyukiliya.

Kuphatikiza Ndikosavuta Kuposa Mukuganiza

Kudyetsa kashiamu silicon 60 30 kumafuna palibe retrofit. Imagwira ntchito pamawaya okhazikika (Ø13-15 mm), ma jakisoni omizidwa pansi pamadzi, komanso makonzedwe a jakisoni wa ufa - ngati kugawa kwa tinthu kumakhala mkati mwa 0.5-3.0 mm. Timazipereka m'njira zitatu: ma granules ophwanyidwa (powonjezera ladle), waya wolumikizidwa kale (wokhala ndi Fe kapena SiMn sheathing), ndi matumba opakidwa 25 kg otsekedwa ndi vacuum m'malo oyera.

Zolemba zazikulu: sungani pansi pa 35 ° C komanso kutali ndi chinyezi. Kukumana ndi mpweya wonyezimira kwa maola oposa 48 kumawonjezera okosijeni pamwamba - kuwoneka ngati fumbi lotuwa pa granules. Osayidi wosanjikizawo amachepetsa kusungunuka ndipo amachepetsa kuperekera kwa Ca bwino. Timaphatikizapo mapaketi a desiccant ndi zizindikiro za chinyezi pazotumiza zilizonse. Pa mizere yosalekeza yoponyera yomwe ikuyenda> matani 150 pa ola, timalimbikitsa kudyetsa masekondi 30-60 musanayambe kugwedeza komaliza-osati panthawi-kuti muwonjezere nthawi yokhalamo muzambiri zazitsulo.

Ndemanga zenizeni zenizeni zimatsimikizira kudalirika. Wogulitsa magalimoto a Tier-1 ku Chongqing anathamanga 47 motsatizana kutentha pogwiritsa ntchito silicon yathu ya calcium 60 30. Avereji yowerengera pa mm² yatsika kuchoka pa 8.2 kufika pa 2.7 (ASTM E45 Method A). Zokolola zawonjezeka ndi 3.1% -osati kuchokera ku zokana zochepa, koma kuchokera ku zochepa zobwereza chifukwa cha zowonongeka.

Kusankha Wopereka Woyenera Kumatanthauza Kufunsa Mafunso Oyenera

Funsani omwe akukugulirani: Kodi mumagaya ndikusakaniza m'nyumba - kapena mumangopanganso zinthu zina? Kodi mungapereke zambiri za OES ndi Leco? Kodi kusiyana kwanu kwapakati pa kuchira kwa Ca pa kutentha kwa matani 100 ndi kotani? Inner Mongolia Xinxin Silicon Industry Co., Ltd. imayankha kuti inde kwa onse atatu. Timagwiritsa ntchito mizere yodzipatulira ya CaSi yokhala ndi kuwongolera kutentha kosatsekeka, kusanthula kwanthawi yeniyeni kusungunuka, ndi sieving yokhazikika yofikira ku ± 0.1 mm kulolerana.

Silicon yathu ya calcium 60 30 imathandizira njira za ferroalloy-osati kungochotsa mpweya, koma pakuphatikiza uinjiniya. Imawirikiza molosera ndi ma ladle opangidwa ndi Mg kuti apititse patsogolo kukhazikika kwachitsulo chachitsulo, komanso ndi zowonjezera za Ti pamagiredi okhazikika a HSLA a microalloyed. Pitani xinxinsilicon.com kuti mutsitse bulletin yathu yaukadaulo "CaSi 60 30 in Ladle Metallurgy: Ma chart a Dose, Inclusion Maps, and Failure Mode Analysis" - yomangidwa kuchokera ku zolemba 217 zopanga zitsulo 14.

Calcium silicon 60 30 si chinthu. Ndi chida chokhazikika. Gwiritsani ntchito bwino, ndipo muwona ma slags oyeretsa, magulu olimba azinthu zamakina, ndi zodabwitsa zochepa pamphero yomaliza.