Zopangira: ndi zinthu ziti zomwe zimagwiritsidwa ntchito popanga kaboni?
Pakupanga kaboni, zopangira zomwe zimagwiritsidwa ntchito nthawi zambiri zimatha kugawidwa kukhala zolimba za kaboni zopangira komanso zomangira ndi zopangira.
Zida zolimba za kaboni zimaphatikizapo mafuta a petroleum coke, bituminous coke, coke metallurgical, anthracite, graphite zachilengedwe ndi graphite scrap, etc.
Binder ndi inpregnating wothandizira amaphatikizapo malasha phula, malasha phula, mafuta anthracene ndi kupanga utomoni, etc.
Kuphatikiza apo, zinthu zina zothandizira monga mchenga wa quartz, tinthu tating'onoting'ono ta coke ndi ufa wa coke amagwiritsidwanso ntchito popanga.
Zinthu zina zapadera za carbon ndi graphite (monga carbon fiber, activated carbon, pyrolytic carbon ndi pyrolytic graphite, glass carbon) zimapangidwa kuchokera ku zipangizo zina zapadera.
Kuwerengetsa: Kodi calcination ndi chiyani??
Njira ya chithandizo cha kutentha imatchedwa calcination.
Calcination ndiye njira yoyamba yochizira kutentha pakupanga mpweya. Calcination imayambitsa kusintha kwa kamangidwe kake ndi thupi ndi mankhwala amitundu yonse ya carbonaceous zopangira.
Kutentha kwa coke kupanga kwa bituminous coke ndi metallurgical coke ndikokwera kwambiri (kuposa 1000 ° C), komwe kumafanana ndi kutentha kwa ng'anjo yamoto mu chomera cha kaboni. Sichingakhalenso calcinate ndipo chimangofunika kuumitsa ndi chinyezi.
Komabe, ngati bituminous coke ndi petroleum coke agwiritsidwa ntchito limodzi asanawonjezedwe, azitumizidwa ku calciner kuti asungunuke pamodzi ndi petroleum coke.
Natural graphite ndi mpweya wakuda safuna calcination.
The extrusion akamaumba ndondomeko makamaka pulasitiki mapindikidwe ndondomeko phala.
The extrusion ndondomeko ya phala ikuchitika mu zinthu chipinda (kapena phala yamphamvu) ndi zozungulira arc nozzle.
Phala lotentha m'chipinda chotsitsa limayendetsedwa ndi plunger yakumbuyo.
Mpweya womwe uli mu phala umakakamizika kuthamangitsidwa mosalekeza, phala limapangidwa mosalekeza ndipo phala limapita patsogolo nthawi yomweyo.
Pamene phala likuyenda mu gawo la silinda la chipinda, phala likhoza kuonedwa ngati loyenda mokhazikika, ndipo granular wosanjikiza kwenikweni ndi ofanana.
Pamene phala limalowa mu gawo la nozzle extrusion ndi arc deformation, phala pafupi ndi khoma la m'kamwa limakhala ndi kukaniza kwakukulu pasadakhale, zinthuzo zimayamba kupindika, phala mkati limatulutsa liwiro losiyana, phala lamkati limakhala patsogolo. patsogolo, chifukwa mu mankhwala pamodzi kachulukidwe radial si yunifolomu, kotero mu chipika extrusion.
Pomaliza, phala limalowa mu mzere wopindika mbali ndikutulutsidwa.
Kuwotcha ndi njira yochizira kutentha momwe zinthu zoponderezedwa zaiwisi zimatenthedwa pamlingo wina pansi pazikhalidwe za kudzipatula kwa mpweya m'malo oteteza mung'anjo.
Pakuwotcha, chifukwa cha kuchotsedwa kwa zovunda, coking wa asphalt amapanga gululi coke, kuwonongeka ndi polymerization wa phula, ndi mapangidwe lalikulu hexagonal mpweya mphete mpweya maukonde, etc., resistivity unachepa kwambiri.About 10000 x 10-6 yaiwisi mankhwala resistivity Ω “m, pambuyo kuwotcha ndi 40-50 x 10-6 Ω” m, otchedwa kondakitala abwino.
Pambuyo pakuwotcha, mankhwalawa amachepa ndi pafupifupi 1% m'mimba mwake, 2% m'litali ndi 2-3% mu voliyumu.
Komabe, akawotcha zinthu zosaphikazo, mbali ina ya phula la malasha imawola n’kukhala gasi n’kuthawa, ndipo mbali inayo imakokera mu bituminous coke.
Kuchuluka kwa coke yopangidwa ndi bituminous ndi kochepa kwambiri kuposa phula la malasha. Ngakhale kuti imachepa pang'ono powotcha, ma pores ambiri osakhazikika komanso ang'onoang'ono okhala ndi ma pore osiyanasiyana amapangidwabe.
Mwachitsanzo, porosity yonse ya zinthu zopangidwa ndi graphitized nthawi zambiri imakhala 25-32%, ndipo yamafuta a kaboni nthawi zambiri imakhala 16-25%.
Kukhalapo kwa ma pores ambiri kudzakhudza kwambiri thupi ndi mankhwala azinthu.
Nthawi zambiri, graphitized mankhwala ndi kuchuluka porosity, utachepa voliyumu kachulukidwe, kuchuluka resistivity, makina mphamvu, pa kutentha ena makutidwe ndi okosijeni mlingo inapita patsogolo, kukana dzimbiri komanso zinawonongeka, mpweya ndi madzi mosavuta permeable.
Impregnation ndi njira yochepetsera porosity, kuonjezera kachulukidwe, kuonjezera mphamvu yopondereza, kuchepetsa kugonjetsedwa kwa mankhwala omalizidwa, ndikusintha thupi ndi mankhwala a mankhwala.
Zolinga zake ndi:
(1) Sinthani matenthedwe ndi magetsi a chinthucho.
(2) Kupititsa patsogolo kutentha kwa kutentha ndi kukhazikika kwa mankhwala.
(3) Kupititsa patsogolo mafuta ndi kuvala kukana kwa mankhwala.
(4) Chotsani zonyansa ndikuwongolera mphamvu zazinthu.
The wothinikizidwa mpweya mankhwala ndi kukula ndi mawonekedwe osiyana madigiri mapindikidwe ndi kugunda kuwonongeka pa Kuwotcha ndi graphitization. Panthawi imodzimodziyo, zodzaza zina zimamangirizidwa pamwamba pa zinthu za carbon.
Sichingagwiritsidwe ntchito popanda makina opangira makina, kotero mankhwalawa ayenera kupangidwa ndi kukonzedwa mu mawonekedwe apadera a geometric.
(2) Kufunika kugwiritsa ntchito
Malinga ndi zofunikira za wogwiritsa ntchito pokonza.
Ngati graphite elekitirodi wa magetsi ng'anjo steelmaking ayenera chikugwirizana, ayenera kupangidwa mu dzenje ulusi pa malekezero onse a mankhwala, ndiyeno maelekitirodi awiri ayenera olumikizidwa kwa ntchito ndi wapadera ulusi olowa.
(3) Zofuna zamakono
Zogulitsa zina zimafunikira kusinthidwa kukhala mawonekedwe apadera ndi mafotokozedwe malinga ndi zosowa zaukadaulo za ogwiritsa ntchito.
Ngakhale kutsika kwapamtunda kumafunika.
Nthawi yotumiza: Dec-10-2020