ISilicon yeCalcium 60 30 Ingxubevange yokwenza i-Steelmaking Deoxidation kunye noLawulo lokuBandakanya 

I-silicon ye-calcium 60 30 ihambisa i-deoxidation echanekileyo kunye nokulawulwa kokubandakanywa kwi-steelmaking yanamhlanje-ingakumbi kwiintsimbi zesakhiwo esiphakamileyo, amabakala emibhobho, kunye nephepha lemoto. Sinike le ngxubevange kwizityalo ezili-12 ze-EAF kunye ne-BOF kulo lonke elase-China nakuMzantsi-mpuma we-Asia kwiinyanga ezili-18 ezidlulileyo. Kuzo zonke iimeko, abasebenzisi babike ngokukhawuleza ukucaciswa kwe-slag, i-residuals ephantsi ye-oksijini ephantsi (0.0018-0.0024 wt%), kunye nokuphuculwa okunokulinganiswa kumazinga okuphumelela okuvavanya kwe-ultrasonic kwi-forging-section forgings.

Kutheni iSilicon yeCalcium 60 30 igqwesa ii-Generic CaSi Alloys

Ayizizo zonke iialloys ze-calcium silicon ziziphatha ngendlela efanayo kwi-ladle metallurgy. Ukutyunjwa kwe-"60 30" kubhekiselele kubuncinci obuqinisekisiweyo: 60% Si kunye ne-30% yeCa ubunzima. Lo mlinganiso ubalulekile-kungekhona njengeleyibhile yokuthengisa, kodwa njenge-anchor thermodynamic. Kwi-60% yeSi, i-alloy ihlala izinzile ngexesha lokutya; ngaphantsi kwe-58%, ithande ukuwohloka kwizicelo zocingo olune-cored. Kwi-30% yeCa, i-dissolution kinetics ihambelana neeprofayili eziqhelekileyo ze-argon-stirring kwii-80-120 ton ladles. Sivavanye iibhetshi ezisixhenxe zeCaSi zorhwebo ecaleni-ngecala: kuphela ezo zidibene zombini iispecs ezifumene ukubuyiswa kweCa okungaguqukiyo ngaphezulu kwama-62%.

Ukulawulwa kokungcola kwahlula ukusebenza kubuthathaka. I-silicon yethu ye-calcium 60 30 ibamba i-Al ≤0.3%, S ≤0.03%, kunye ne-P ≤0.025%. Kutheni ibalulekile nje loo nto? Ialuminiyam yenza ukunyibilika okuphantsi kwe-Al₂O₃-CaO spinels ezivala imilomo ye-tundish. Isulfure ityhefa amandla okwenza i-calcium yesulfide. Omnye umthengi eGuangdong wehlise izehlo zokuvala umlomo wombhobho ngama-74% emva kokutshintsha ukusuka kwibhetshi ye-28% yeCa ne-0.52% Al ukuya kwibakala lethu eliqinisekisiweyo lama-60 30.

Oku akuyothiyori. Ilinganiswe kwidatha yesampulu ye-tundish, iimephu zokufakwa ezivela kuhlalutyo lwe-SEM-EDS, kunye neengxelo zesivuno sokugaya. I-calcium silicon 60 30 ayisusi nje ioksijini-ilungisa kwakhona i-morphology efakiwe. IGlobular CaS kunye ne-calcium aluminates zithatha indawo yamaqela e-alumina abukhali. Olo tshintsho luphucula ngokuthe ngqo i-ductility kwi--40 ° C kunye nobomi bokukhathala kumacandelo abandayo.

Apho i-Standard CaSi isilela khona-kwaye i-60 30 iyilungisa njani

Abanye banokuthi ngexabiso eliphantsi ngama-25–28% iCaSi isebenza kakuhle kwisiseko sokukhupha amanzi. Kodwa enyanisweni, loo mabanga anyanzela urhwebo. Isiqulatho se-calcium esisezantsi sifuna amazinga aphezulu okongezwa-ukunyusa umthamo we-slag, ukunyusa ukunxiba kwe-refractory, kunye nokushisa kwe-ladle. Omnye umenzi wentsimbi wongeze i-1.8 kg/toni ye-26% yeCaSi ukubetha ithagethi [O]; ukutshintshela kwi-silicon ye-calcium 60 i-30 yokusika idosi ukuya kwi-1.1 kg / itoni ngelixa iphucula ukubuyiswa kwe-Ca ngepesenti ze-19.

Iindleko zangempela azikho i-alloy-yimpembelelo ephantsi. I-CaSi enedosi engaphantsi ishiya i-oxygen inyibilika phezulu. I-CaSi enedosi egqithisileyo idala iintambo ze-CaS ezigqithisileyo. Akukho nanye imeko edlulayo i-ASTM A1019 okanye i-EN 10228-2 iimfuno zokulinganisa ukufakwa kwipleyiti yenqanawa yoxinzelelo. Ibanga lethu le-60 30 libetha ifestile emxinwa apho umsebenzi we-Ca wanele ukulungisa okuqukiweyo *ngaphandle* kokuhluza inyibiliko. Ulingo lwaseLebhu lubonisa iziphumo ezizezona zilungileyo kwi-0.0025–0.0032% enyibilikisiweyo ye-Ca—efumaneka kuphela ngolawulo oluluqilima lokwakheka kunye nomxholo ophantsi werhasi (<15 cm³/100g).

Sivavanya lonke ubushushu be-hydrogen, initrogen, kunye neoksijini sisebenzisa i-inert gas fusion (Leco ONH-836). Akukho zinqanawa zebhetshi ngaphandle kwesatifikethi esipheleleyo sokuhlalutya-kubandakanya i-Ca, i-Si, i-Al, i-S, i-P, kunye ne-Mg eseleyo. Abathengi basixelela ukuba oku kulandeleka kunciphisa ixesha labo langaphakathi le-QA ngesiqingatha xa befanelekela ukutshisa okutsha kwizicelo zomgangatho wenyukliya.

Ukudityaniswa Lula Kunokuba Ucinga

Ukutya i-silicon ye-calcium 60 30 ayifuni kubuyiselwa. Isebenza kwiinkqubo eziqhelekileyo zocingo lwe-cored (Ø13-15 mm), ii-injection ze-lance ephantsi kwamanzi, kunye ne-setups ye-injection ye-powder-ukuba ukusabalalisa ubukhulu be-particle buhlala ngaphakathi kwe-0.5-3.0 mm. Sinikezela ngeendlela ezintathu zomzimba: iigranules ezityumkileyo (zokongeza i-ladle), ucingo olufakwe ngaphambili (kunye ne-Fe okanye i-SiMn sheathing), kunye ne-precision-packed 25 kg ye-vacuum-sealed bags yeendawo zokuhlala ezicocekileyo.

Amanqaku okufakela angundoqo: gcina ngaphantsi kwe-35 ° C kwaye kude nokufuma. Ukutyhileka kumoya ofumileyo ngeeyure ze-48 zonyusa i-oxidation yendawo-ebonakala njengothuli olungwevu kwiigranules. Loo maleko oxide uyacotha unyibiliko kwaye kunciphisa unikezelo Ca olusebenzayo. Sibandakanya iipakethi ze-desiccant kunye nezibonakaliso zomswakama kuzo zonke izinto ezithunyelwa ngaphandle. Ukuqhubela phambili imigca yokuphosa eqhuba> iitoni ze-150 / iyure, sincoma ukutyisa imizuzwana ye-30-60 ngaphambi kokuvuselela i-argon yokugqibela-kungekhona ngexesha-ukwandisa ixesha lokuhlala kwi-bulk yensimbi.

Ingxelo yelizwe lokwenyani iqinisekisa ukuthembeka. Umboneleli we-auto we-Tier-1 e-Chongqing uqhube ama-47 obushushu obulandelelanayo esebenzisa isilicon yethu ye-calcium 60 30. Ubalo oluphakathi oluphakathi nge-mm² lwehle ukusuka kwi-8.2 ukuya kwi-2.7 (ASTM E45 Indlela A). Isivuno sinyuke nge-3.1%-hayi ukusuka kwi-rejected embalwa, kodwa ukusuka kwii-re-roll ezimbalwa ngenxa yeziphene zomhlaba.

Ukukhetha uMboneleli oLungileyo kuthetha ukubuza imibuzo echanekileyo

Buza umthengisi wakho: Ngaba uyagaya kwaye udibanise ngaphakathi-okanye uphinda upakishe imathiriyeli yomntu wesithathu? Ngaba unokubonelela nge-batch-specific OES kunye nedatha yeLeco? Ithini iavareji yakho yokubuyisela i-Ca kwiitoni ezili-100 zobushushu? I-Inner Mongolia Xinxin Silicon Industry Co., Ltd. iphendula ewe kuzo zontathu. Sisebenzisa imigca yemveliso yeCaSi ezinikeleyo enolawulo lobushushu obuvaliweyo, uhlalutyo lwexesha lokwenyani lokunyibilika, kunye ne-automated sieving ilinganiswe ukuya ku-± 0.1 mm ukunyamezela.

I-silicon yethu ye-calcium 60 30 isekela izicwangciso ze-ferroalloy-kungekhona nje i-deoxidation, kodwa kubunjineli obujoliswe ekufakweni. Idibanisa ngokuqikelelwayo kunye ne-Mg-treated ladles yokuphucula i-nodularity kwi-ductile iron, kunye ne-Ti yokongeza amabakala azinzileyo e-HSLA e-microalloyed. Ndwendwela xinxinsilicon.com ukukhuphela i-bulletin yethu yobugcisa "CaSi 60 30 in Ladle Metallurgy: Iitshathi zeDosage, iiMaphu eziBandakanyiweyo, kunye noHlalutyo lweNdlela yokuSilela" -yakhiwe kwiirekhodi ze-217 zemveliso kwii-steelworks ze-14.

I-calcium silicon 60 30 ayisiyonto yorhwebo. Sisixhobo esilungelelanisiweyo. Yisebenzise ngokufanelekileyo, kwaye uya kubona i-slags ecocekileyo, iibhendi zepropathi eziqinisiweyo, kunye nezinto ezimbalwa ezimangalisayo kwindawo yokugqiba.