Carburizing tus neeg sawv cev, yog siv nyob rau hauv steel thiab casting kev lag luam, rau carburizing, desulfurization thiab lwm yam ntaub ntawv pab. Kev siv ntau tshaj plaws hauv kev lag luam hlau thiab hlau smelting yog tsim los rau cov ntsiab lus carbon hlawv nyob rau hauv cov txheej txheem ntawm hlau thiab hlau melting thiab ntxiv cov khoom uas muaj carbon.
Nyob rau hauv cov txheej txheem smelting ntawm cov khoom hlau thiab steel, feem ntau vim yog lub sij hawm smelting, tuav lub sij hawm, overheating lub sij hawm thiab lwm yam, lub melting poob ntawm carbon ntsiab lus nyob rau hauv cov kua hlau nce, uas ua rau ib tug txo nyob rau hauv cov pa roj carbon ntsiab lus ntawm cov kua hlau, uas ua rau lub melting ntawm cov ntsiab lus ntawm cov hlau thiab hlau. cov pa roj carbon ntsiab lus ntawm cov kua hlau tsis tuaj yeem ncav cuag qhov xav tau theoretical tus nqi ntawm refining. Yog li ntawd, nws yog ib qho tsim nyog yuav tsum tau ntxiv cov khoom carburizing los kho cov ntsiab lus ntawm cov hlau, uas yog ib qho tseem ceeb auxiliary additive rau zus tau tej cov hlau zoo.
Carburizing tus neeg sawv cev raws li cov khoom siv raw tuaj yeem muab faib ua: ntoo carbon, thee carbon, coke carbon, graphite.
1. Ntoo carbon
2. Coal hom carbon
* General calcining thee carburizer: Nws yog ib yam khoom uas tsis tshua muaj tshauv thiab tsis tshua muaj sulfur zoo ntxuav anthracite nyob rau hauv calcination rauv tom qab txog 1250 ℃ kub calcination, mas tsim nyob rau hauv Ningxia, Inner Mongolia. Cov ntsiab lus carbon dav dav yog 90-93%. Nws yog tsuas yog siv nyob rau hauv steel ua lag luam, thiab ib co casting tuam txhab uas muag yog siv nyob rau hauv grey cam khwb cia hlau. Vim yog cov qauv compact ntawm nws cov pa roj carbon molecules, cov txheej txheem nqus cua sov qeeb thiab lub sijhawm ntev.
* Asphalt coking carburizer: ib qho khoom los ntawm cov thee tar hydrogenation los tsim cov roj. Nws yog cov pa roj carbon ntau, tsis muaj leej faj thiab tsis tshua muaj nitrogen carburizer muab rho tawm los ntawm tar. Cov pa roj carbon yog nruab nrab ntawm 96-99.5%, cov qauv hloov tsis tau, cov neeg siv tshuab lub zog thiab hnav tsis kam thiab kev ua kom yooj yim, yooj yim graphitization.
* Metallurgical coke carburizing tus neeg saib xyuas: coking thee firing, feem ntau yog cupola nrog loj coke, ntxiv rau smelting, tab sis kuj siv rau hlau nqi carburizing.
3. Coke (petroleum coke) carbon
* Calcined coke carburizer: Nws yog cov khoom ua los ntawm cov roj av uas tsis muaj sulfur coke ua raw khoom, uas yog ua tiav nyob rau hauv lub qhov cub calcination ntawm 1300-1500 degrees tom qab tshem tawm noo noo, volatiles thiab impurities. Nws cov ntsiab lus ruaj khov yog feem ntau ruaj khov ntawm 98.5%, thiab nws cov ntsiab lus sulfur feem ntau tsawg dua 0.5% lossis 1%. Nws qhov ceev yog compact, tsis yooj yim rau decompose, thiab nws lub sij hawm siv yog nruab nrab. Kev tsim khoom feem ntau yog nyob hauv Shandong, Liaoning, Tianjin. Vim tias nws cov nqi thiab cov khoom siv hauv ntau pawg ntawm tus neeg sawv cev carburizing muaj qhov zoo dua, kev ua lag luam tau siv ntau dua.
* Graphitic petroleum coke carburizing tus neeg sawv cev: roj av coke nyob rau hauv graphitic smelting rauv tom qab 3000 degrees ntawm kub kub ntau lawm ntawm graphitic khoom, nrog ceev nqus, siab carbon thiab tsawg sulfur zoo. Nws cov ntsiab lus carbon yog 98-99%, cov ntsiab lus ntawm sulfur yog qis dua 0.05% lossis 0.03%, cov chaw tsim khoom yog concentrated hauv Inner Mongolia, Jiangsu, Sichuan thiab lwm yam. Lwm txoj hauv kev los ntawm graphite electrode txiav pov tseg, vim tias graphite electrode nws tus kheej tom qab kho graphitization, cov khib nyiab kuj tuaj yeem siv los ua tus neeg sawv cev carburizing rau steel mills.
* Semi-graphitic petroleum coke carburizer: graphitic kub tsis siab li graphitic carburizer, cov ntsiab lus carbon feem ntau ntau dua 99.5, cov ntsiab lus sulfur siab dua graphitic carburizer, qis dua 0.3%.
4. Graphite hom
* Lub ntiaj teb zoo li graphite carburizing tus neeg sawv cev: yog daim ntawv thov ntawm lub ntiaj teb zoo li graphite nyob rau hauv hlau thiab hlau smelting los yog casting carburizing, nws lub ntsiab tsim cheeb tsam nyob rau hauv Hunan, yog cov ncaj qha daim ntawv thov ntawm lub ntiaj teb zoo li graphite hmoov, feem ntau carbon cov ntsiab lus nyob rau hauv 75-80 %, tuaj yeem ua kom huv los ua kom cov khoom muaj cov ntsiab lus carbon.
* Ntuj graphite carburizing tus neeg saib xyuas: feem ntau yog flake graphite, carbon cov ntsiab lus nyob rau hauv 65-99%, tsis tshua muaj stability, feem ntau siv nyob rau hauv steel mills.
* Composite carburizing tus neeg saib xyuas: graphite hmoov, coke hmoov, roj av coke thiab lwm yam ntaub ntawv ko taw, ntxiv cov ntawv sib txawv nrog lub tshuab tuaj yeem nias rau hauv cov duab, rau cov pas nrig granular. Cov ntsiab lus carbon feem ntau yog nyob nruab nrab ntawm 93 thiab 97%, thiab cov ntsiab lus sulfur tsis ruaj khov, feem ntau ntawm 0.09 thiab 0.7.
Lub sij hawm xa tuaj: Nov-17-2022