Dab tsi yog graphitized roj av coke?

Graphitized Petroleum Coke: Cov Khoom Siv Carbon Ua Tau Zoo Uas Tau Los Ntawm Petroleum Coke

Cov roj av coke uas muaj graphitized yog cov khoom siv carbon uas tsim los ntawm kev siv cov roj av coke rau hauv kev kho graphitization kub siab (feem ntau yog 2,800 ° C–3,000 ° C). Nws lub ntsiab lus tseem ceeb yog kev hloov pauv cov pa roj carbon hauv cov roj av coke los ntawm qhov kub siab mus rau hauv cov qauv crystalline uas nyob ze rau graphite ntuj, ua rau nws cov khoom siv lub cev thiab tshuaj lom neeg zoo dua. Hauv qab no yog kev tshuaj xyuas ntxaws ntxaws:

I. Cov Yam Ntxwv Tseem Ceeb: Kev Txhim Kho Kev Ua Haujlwm Los Ntawm Kev Siv Graphitization

1. Cov ntsiab lus carbon siab & cov khoom tsis muaj kuab paug tsawg
   • Cov pa roj carbon ntau tshaj 98%, cov pa sulfur tsawg li <0.05%, nrog rau cov tshauv thiab cov khoom volatile qis dua li cov roj av coke. Qhov kev ntshiab siab no ua rau nws zoo tagnrho rau metallurgy, tshuaj lom neeg, thiab lwm yam lag luam.
2. Kev Ua Hluav Taws Xob Zoo & Kev Ua Kub Zoo
   • Kev ua graphitization tsim ib qho qauv txheej txheem tsis tu ncua, txo qhov kev tiv thaiv kev tsiv teb tsaws chaw ntawm cov hluav taws xob. Kev tiv thaiv poob qis mus rau 5–7 μΩ·m (vs. 8–12 μΩ·m rau cov coke ib txwm muaj), ze rau qhov conductivity ntawm graphite ntuj.
3. Kev Ruaj Ntseg Thermal Siab & Kev Tsis Muaj Tshuaj Lom Zem
   • Tswj tau qhov ruaj khov ntawm qhov kub siab (piv txwv li, >1,600°C hauv cov cub hluav taws xob ua hlau) thiab tiv taus cov tshuaj tiv thaiv nrog cov kua qaub / alkalis. Haum rau cov khoom siv refractory thiab cov reactors kub siab.
4. Tus Nqi Nqus Tau Siab & Tus Nqi Qis ntawm Kev Nthuav Dav Thermal (CTE)
   • Cov qauv porous (30–50% porosity) thiab CTE qis (~ 1.5–2.5 × 10⁻⁶ / ° C) zoo heev rau cov ntawv thov xws li carburizers thiab lubricants.

II. Cov Txheej Txheem Tsim Khoom: Cov Kauj Ruam Tseem Ceeb hauv Kev Ua Graphitization Kub Siab

1. Kev kho ua ntej ntawm cov khoom siv raw
   • Xaiv cov roj av coke uas muaj cov sulfur tsawg, cov tshauv tsawg (piv txwv li, cov coke koob lossis cov coke daim txhuam cev los ntawm kev coking qeeb). Muab tsoo, tshuaj ntsuam, thiab ua kom cov khoom me me sib npaug (piv txwv li, 0–1 hli, 1–3 hli).
2. Kev Ua Graphitization Kub Siab
   • Txoj Kev Siv Rau Lub Cub Acheson Ib Txwm Muaj: Sib tov roj av coke nrog cov neeg sawv cev graphitizing (piv txwv li, xuab zeb quartz) thiab cua sov rau 2,800–3,000°C hauv lub cub tawg tiv taus rau 20–50 teev. Siv hluav taws xob ntau (6,000–8,000 kWh/ton) tab sis cov khoom siv laus lawm.
   • Txoj Kev Siv Lub Cub Hluav Taws Xob Niaj Hnub Nim No: Siv cov cub hluav taws xob ntsug lossis lub raj tig uas tiv thaiv los ntawm cov pa roj inert (N₂/Ar) kom cua sov/txias sai dua (lub sijhawm ua haujlwm ib puag ncig: 24–48 teev). Kev siv hluav taws xob txo qis mus rau 3,500 kWh/ton, nrog rau kev huv dua (tshauv <0.1%).
3. Kev Ua Tom Qab
   • Txias, tsoo, thiab tshuaj ntsuam cov coke uas muaj graphitized. Siv cov txheej txheej saum npoo (piv txwv li, pitch) lossis cov pa tshuaj lom neeg (CVD) los txhim kho kev ua haujlwm raws li cov neeg siv khoom xav tau.

III. Cov Ntawv Thov: Ib qho "Khoom Siv Tau Ntau Yam" rau Metallurgy & Tshuaj

1. Kev Lag Luam Hlau
   • Cov Hluav Taws Xob Graphite: Cov khoom siv tseem ceeb rau kev ua hlau rau lub cub hluav taws xob, tiv taus qhov kub thiab txias siab thiab cov dej ntws kom txhim kho kev ua haujlwm.
   • Carburizer: Ua kom cov pa roj carbon ntau ntxiv (>90% kev nqus) sai sai hauv kev ua hlau ductile/grey thaum txo cov sulfur (<0.05%) los txhim kho qhov zoo ntawm kev ua hlau.
   • Cov Khoom Siv Refractory: Siv rau hauv cov cib carbon lossis cov khoom sib xyaw rau cov ntaub thaiv qhov cub kub siab kom ntev lub neej kev pabcuam.
2. Kev Lag Luam Tshuaj
   • Kev Tsim Silicon Carbide: Ua haujlwm ua cov pa roj carbon uas cuam tshuam nrog SiO₂ los tsim cov khoom siv silicon carbide abrasives uas muaj zog thiab tiv taus kev hnav.
   • Cov Khoom Siv Roj Teeb: Nano-sized graphitized coke txhim kho kev ua haujlwm ntawm lithium-ion roj teeb anode.
3. Lwm Cov Ntawv Thov
   • Cov roj nplua nyeem: Cov qauv txheej txheem thiab cov coefficient sib txhuam qis ua rau siv tau ua cov roj nplua nyeem khov kho hauv cov tshuab.
   • Cov Khoom Siv Yas/Roj Hmab Ntxiv: Txhim kho kev coj hluav taws xob lossis cov khoom tiv thaiv hluav taws xob.

IV. Kev sib piv nrog cov roj av Coke

V. Tus Nqi Lag Luam & Cov Qauv

Vim yog kev loj hlob ntawm kev tsim cov hlau ua los ntawm lub cub hluav taws xob thiab cov tsheb siv zog tshiab, qhov kev thov rau cov roj av coke uas muaj graphitized tseem nce ntxiv. Cov thev naus laus zis niaj hnub no txo ​​cov nqi tsim khoom los ntawm 40-50% piv rau cov txheej txheem ib txwm muaj, ua rau muaj kev nthuav dav mus rau hauv cov ntawv thov nruab nrab. Kev nce qib yav tom ntej, xws li kev txo cov hydrogen thiab kev ua kom sov microwave, cog lus tias yuav muaj cov txheej txheem tsim khoom ntsuab dua, ua haujlwm tau zoo dua.