I-Ferro Silicon kunye neCalcium: IiNzuzo eziPhambili zokuSebenzisa kunye nezicelo 

I-Ferro silicon kunye ne-calcium-amahlakani amabini asisiseko angafane abe yintloko yeendaba zokwenza intsimbi kodwa ngokuzolileyo abumba zonke iitoni zomgangatho ophezulu wolwakhiwo lwentsimbi, umbhobho wentsimbi, okanye ukuqengqeleka kwemoto kwimigca yemveliso yanamhlanje. Kwi-Inner Mongolia i-Xinnxin Silicon Industry Co., Ltd., siye sanikezela ngokubini iminyaka engaphezu kwe-14-kungekhona njengempahla eyodwa, kodwa njengamahlakani abunjineli obuchanekileyo kulawulo lwesinyithi. I-Ferro silicon kunye nekhalsiyam ayenzi "deoxidize." Baququzelela ukususwa kwe-oksijini, i-nucleate graphite spheroids, ukucinezela i-manganese sulfide stringers, kunye nokutshixa isulfure kwi-stable, inclusions ye-globular. Yiyo loo nto abathengi baseShandong, eHebei naseVietnam bengabuzi *ukuba* bayayifuna-babuza *yeyiphi na imilinganiselo*, *ubuphi ubungakanani bamasuntswana*, kwaye *unokuqinisekisa ngokukhawuleza kangakanani ukuhambelana kwebhetshi?*

Kutheni i-ferro silicon kunye ne-calcium zisebenza ngcono kunye kunokwahlukana

I-ferrosilicon ye-Standalone (FeSi) isusa i-oksijini-kodwa ishiya ngasemva kwe-sulfure eseleyo kunye ne-morphology ehlanganisiweyo engalinganiyo. Ikhalsiyam iyodwa iba ngumphunga ngokukhawuleza kakhulu kwintsimbi enyibilikisiweyo, inika ukuchacha okulambathayo kunye nokusasazwa okungaguqukiyo. Hlanganisa nabo njenge-calcium silicide (CaSi) okanye i-silicon-barium-calcium alloy-kwaye ufumana ukuzinza kwe-thermal, i-kinetics yokukhululwa elawulwayo, kunye ne-synergistic desulfurization. Kwiimvavanyo ze-pilot ye-pilot ye-ladle yethu, i-CaSi yongeza kwi-0.8-1.2 kg / itoni yehlisa i-oksijini iyonke ukusuka kwi-32 ppm ukuya kwi-18 ppm * kwaye * inqumle umxholo wesulfure ngama-37% ngokuchasene nonyango lwe-FeSi-kuphela. Isitixo? I-calcium iguqula i-alumina inclusions; i-silicon igcina umoya wokunciphisa. Ayinakusebenza ngokugqibeleleyo ngaphandle komnye.

Oku sikubona imihla ngemihla kwiimpendulo zabathengi: Isiseko se-Tier-1 e-Tangshan sitshintshile ukusuka kwi-FeSi + CaAl wire ukuya kwi-Si-Ba-Ca esele ifakwe ngaphambili emva kokungaphumeleli okuphindaphindiweyo kwe-nodularity kwi-40-mm ductile iron castings. Isivuno sabo sinyuke ukusuka kwi-71% ukuya kwi-94% kwiiveki ezimbini. Ngoba? I-calcium silicide esezantsi yokunyibilika (985 ° C vs. 1,260 ° C ye-Ca ecocekileyo) ivumela ukuba inyibilike ngokupheleleyo ngaphambi kokuba i-slag skimming. Umxholo wayo we-silicon ukhusela ngokuchasene ne-reoxidation ngexesha lokucofa. Akunjalo i-theory-yi-237 ishisa ngokulandelelana kunye ne-nodularity> 85% kwi-ASTM A536 iBanga 65-45-12.

Izicelo ezintathu zehlabathi lokwenyani apho i-ferro silicon kunye ne-calcium zenza okanye ziphule ukusebenza

• Ukutofa ngentsimbi yentsimbi: I-calcium silicide (idla ngokuba yi-30–33% Ca, 58–62% Si) iinucleates Uhlobo lwe-graphite spheroids kwi-1,420–1,450°C. Incinci kakhulu i-Ca → igraphite yeflake; kakhulu → inkunkuma ye-calcium oxide. I-CaSi-30 yethu eqhelekileyo idibana ne-GB / T 20935.1-2018 kwaye ibamba ukunyamezela kwe-± 0.8% kwi-Ca content-ibaluleke kakhulu xa i-inoculant dosage yi-0.12% ye-melt weight.
• Ukucokisa intsimbi yesibini: Kwi-RH degassers, ii-alloys ze-Si-Ba-Ca zigqithise i-FeSi + CaF₂ blends. I-Barium inciphisa ukunyanzeliswa komhlaba; i-calcium ilungisa isulfure; I-silicon inqanda ukuphosa ugwebu. Omnye umthengi unciphise ukusetyenziswa kwe-argon nge-22% emva kokutshintsha-kuba ukufakwa kwe-flotation kukhawuleze ngaphandle komthamo we-slag.
• Ukutya ngeengcingo ezineentambo ezityaliweyo: Apha, ubungakanani bamasuntswana bubaluleke ngaphezu kokwakheka. Sisenza i-CaSi ukuya kwi-D₅₀ = 0.85 mm—yomelele ngokwaneleyo ukwenzela ukondla ucingo oluzinzileyo kwi-280 m/min, irhabaxa ngokwaneleyo ukuthintela umngcipheko wokudubula kothuli. Abathengi babika i-92% ye-calcium recovery vs. 68% kunye ne-sub-0.3-mm powders.

Yintoni abathengi abangayijongiyo-kwaye bahlawule kamva

Abanye bacinga ukuba zonke i-ferro silicon kunye neemveliso ze-calcium ziyatshintsheka. Akunjalo. Siye savavanya i-17 yeebhetshi ze-CaSi ezivela kumazwekazi amathathu: i-4 ayiphumelelanga uhlalutyo lwe-sieve (iintlawulo ezigqithisileyo), i-6 ibonise ukuhlukana kwe-Ca kumacandelo anqamlekileyo, kunye ne-3 equlethwe> i-0.15% ye-phosphorus- eyaneleyo ukukhupha i-carbon steels ephantsi. Isiphumo sokwenyani sehlabathi? Umbhobho wokugaya umbhobho e-Jiangsu ulahle iitoni ze-112 ze-API 5L X65 emva kokuqhekeka kwe-hydrogen-ilandelwa kwi-CaSi ecebileyo ye-phosphorus eyadlula i-QC yabo engenayo.

Yiyo loo nto isiqinisekiso sethu somgangatho asingomaphepha-yifiziksi. Iqashiso ngalinye lenziwa uhlalutyo lwe-OES (Spectro MAXx), i-laser diffraction sizing (i-Malvern Mastersizer 3000), kunye ne-microscopy yenqanaba elishushu ukuqinisekisa ukuziphatha kokutshatyalaliswa kwi-1,480 ° C. Sibhala zonke iziphumo zovavanyo-hayi nje ukupasa/ukungaphumeleli. Ukuba isicelo sakho sifuna <0.02% Al okanye <0.005% S, siya kwabelana ngefayile yembonakalo ekrwada. Akukho glosi yentengiso. Idatha nje onokuthi uyifake kwi-Melt Shop yakho ye-MES.

Ukukhetha imveliso efanelekileyo iqala ngesithando somlilo sakho-kungekhona ikhathalogu yethu

Zibuze imibuzo emithathu ngaphambi kokuba u-odole:

1. Ithini iprofayile yakho yobushushu beladle? Ngaphantsi kwe-1,400°C? Khetha iCaSi-28 (indawo enyibilikayo esezantsi). Ngaphezulu kwe-1,480°C? Yiya kuCaSi-33 ukuze unyibilike kancinane kunye nokungena nzulu.
2. Iyintoni injongo yakho yesulfure? >0.020%? Beka phambili iSi-Ba-Ca (i-Ba yongeza umthamo wesulfide). <0.008%? Sebenzisa i-CaSi + MgFe ucingo olunezikhonkwane ukuze upholise okokugqibela.
3. Iqine kangakanani ifestile yakho yonikezelo? Ixesha lethu eliqhelekileyo lokukhokela ziintsuku ezisi-7 zeFOB Tianjin. Ngee-odolo zongxamiseko phantsi kweeyure ze-48, sibambe i-120 MT ye-CaSi-30 kwisitokhwe sendawo yokugcina impahla-ihlolwe kwangaphambili, ipakishwe ngaphambili, ilungele ukulayishwa kwesikhongozeli.

I-silicon ye-Ferro kunye ne-calcium ayizongezo. Ziyi-metallurgical levers-chanekile, ayinakuguqulwa, kwaye ayinakuxoxisana kwizicelo eziphezulu zentembeko. Kwi-Inner Mongolia i-Xinxin Silicon Industry Co., Ltd., sibaphatha ngolo hlobo: akukho fomyula zesitokhwe, akukho nkcazo yegeneric, akukho ngqikelelo. I-alloys nje ilinganiswe kwikhemistri yakho, izixhobo zakho, kunye nomxube wakho we-scrap. Ngenxa yokuba xa ukushisa kwakho okulandelayo kubetha i-1,430 ° C, into ebalulekileyo ayikho ileyibhile kwisikhwama-ukuba i-calcium inyibilika * phambi kweefom ze-slag, kunye nokuba i-silicon ihlala isebenza * emva kokuba i-argon iyeke ukuxubha.