Tus neeg sawv cev carburizing, yog siv rau hauv kev lag luam hlau thiab casting, rau carburizing, desulfurization thiab lwm yam khoom siv pabcuam. Qhov siv dav tshaj plaws hauv kev lag luam hlau thiab hlau smelting yog los them rau cov pa roj carbon uas hlawv thaum lub sijhawm hlau thiab hlau yaj thiab ntxiv cov tshuaj uas muaj carbon.
Hauv cov txheej txheem smelting ntawm cov hlau thiab cov khoom hlau, feem ntau vim yog lub sijhawm smelting, lub sijhawm tuav, lub sijhawm overheating thiab lwm yam, qhov poob ntawm cov pa roj carbon hauv cov hlau kua nce ntxiv, ua rau cov pa roj carbon ntawm cov hlau kua txo qis, ua rau cov pa roj carbon ntawm cov hlau kua tsis tuaj yeem ncav cuag qhov kev cia siab ntawm kev ua kom zoo. Yog li ntawd, nws yog qhov tsim nyog los ntxiv cov khoom carburizing los kho cov pa roj carbon ntawm cov hlau, uas yog cov khoom siv pabcuam tseem ceeb rau kev tsim cov hlau zoo.
Raws li cov khoom siv raw, cov neeg sawv cev carburizing tuaj yeem muab faib ua: ntoo carbon, thee carbon, coke carbon, graphite.
1. Cov ntoo carbon
2. Cov thee hom carbon
* Cov roj av calcining dav dav: Nws yog cov khoom lag luam ntawm cov tshauv tsawg thiab cov sulfur tsawg ntxuav anthracite hauv lub cub tawg calcination tom qab txog 1250 ℃ kub siab calcination, feem ntau tsim nyob rau hauv Ningxia, Inner Mongolia. Cov ntsiab lus carbon dav dav yog 90-93%. Nws yog siv rau hauv cov tuam txhab ua hlau, thiab qee lub tuam txhab casting siv rau hauv grey cast iron. 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 yam khoom ntawm cov thee tar hydrogenation los tsim roj. Nws yog ib qho carburizer uas tau rho tawm los ntawm tar. Cov ntsiab lus carbon yog ntawm 96-99.5%, cov ntsiab lus volatile yog qis, cov qauv yog ntom, lub zog kho tshuab thiab hnav tsis kam ntawm cov khoom me me yog qhov siab, yooj yim graphitization.
* Tus neeg sawv cev rau cov hlau coke carburizing: coking thee firing, feem ntau yog cupola nrog cov coke loj, ntxiv rau kev smelting, tab sis kuj siv rau cov hlau them carburizing.
3. Coke (roj av coke) carbon
* Calcined coke carburizer: Nws yog ib yam khoom ua los ntawm cov roj av coke uas tsis muaj sulfur ua raw khoom, uas tau ua tiav hauv lub cub tawg calcination ntawm 1300-1500 degrees tom qab tshem tawm cov dej noo, volatiles thiab impurities. Nws cov pa roj carbon ruaj khov feem ntau ruaj khov ntawm li 98.5%, thiab nws cov sulfur cov ntsiab lus feem ntau tsawg dua 0.5% lossis 1%. Nws qhov ceev yog compact, tsis yooj yim rau decompose, thiab nws lub sijhawm siv yog nruab nrab. Kev tsim khoom feem ntau yog concentrated hauv Shandong, Liaoning, Tianjin. Vim nws tus nqi thiab kev muab khoom hauv ntau pawg ntawm cov neeg sawv cev carburizing muaj qhov zoo dua, kev ua lag luam tau siv dav dua.
* Tus neeg sawv cev carburizing graphitic roj coke: roj coke hauv graphitic smelting cub tawg tom qab 3000 degrees ntawm qhov kub siab tsim cov khoom graphitic, nrog kev nqus sai, cov pa roj carbon ntau thiab cov sulfur tsawg. Nws cov ntsiab lus carbon yog 98-99%, cov ntsiab lus sulfur qis dua 0.05% lossis 0.03%, cov cheeb tsam 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 kev kho graphitization, cov pov tseg kuj tseem siv tau ua tus neeg sawv cev carburizing rau cov chaw ua hlau.
* Semi-graphitic roj av coke carburizer: graphitic kub tsis siab npaum 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. Hom graphite
* Tus neeg sawv cev carburizing graphite zoo li lub ntiaj teb: yog daim ntawv thov ntawm graphite zoo li lub ntiaj teb hauv hlau thiab hlau smelting lossis casting carburizing, nws thaj chaw tsim khoom tseem ceeb hauv Hunan, yog daim ntawv thov ncaj qha ntawm cov hmoov graphite zoo li lub ntiaj teb, feem ntau cov ntsiab lus carbon hauv 75-80%, tuaj yeem purified kom nce cov khoom carbon cov ntsiab lus.
* Tus neeg sawv cev graphite carburizing ntuj: feem ntau yog rau flake graphite, cov ntsiab lus carbon hauv 65-99%, kev ruaj khov qis, feem ntau siv rau hauv cov hlau mills.
* Cov neeg sawv cev sib xyaw ua ke: hmoov graphite, hmoov coke, roj av coke thiab lwm yam khoom siv taw, ntxiv cov binders sib txawv nrog lub tshuab tuaj yeem nias rau hauv cov duab, rau cov pas nrig granular. Cov ntsiab lus carbon feem ntau yog ntawm 93 thiab 97%, thiab cov ntsiab lus sulfur tsis ruaj khov heev, feem ntau ntawm 0.09 thiab 0.7.
Lub sijhawm tshaj tawm: Kaum Ib Hlis-17-2022