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Yakadzama tekinoroji maitiro egraphite electrode

Raw materials: Ndeapi mambishi anoshandiswa kugadzira kabhoni?

Mukugadzira kabhoni, izvo mbishi zvinowanzoshandiswa zvinogona kukamurwa kuita yakasimba kabhoni raw materials uye binder uye impregnating agent.
Solid carbon raw materials zvinosanganisira petroleum coke, bituminous coke, metallurgical coke, anthracite, natural graphite uye graphite scrap, nezvimwewo.
Binder uye inregnating agent inosanganisira marasha pitch, marasha tara, anthracene mafuta uye synthetic resin, nezvimwe.
Mukuwedzera, zvimwe zvekubatsira zvakadai sejecha requartz, metallurgical coke particles uye coke powder zvinoshandiswawo mukugadzira.
Zvimwe zvakakosha kabhoni uye zvigadzirwa zvegraphite (senge kabhoni faibha, activated kabhoni, pyrolytic kabhoni uye pyrolytic graphite, girazi kabhoni) inogadzirwa kubva kune zvimwe zvakakosha.

Calcination: Chii chinonzi calcination?Ndeipi mbishi zvinhu zvinoda kuverengerwa?

Kupisa kwepamusoro kwekabhoni raw materials mukuparadzaniswa nemhepo (1200-1500°C)
Nzira yekurapa kupisa inonzi calcination.
Calcination ndiyo yekutanga kupisa kupisa maitiro mukugadzira kabhoni.Calcination inokonzeresa shanduko muchimiro uye chemuviri uye chemakemikari zvimiro zvemarudzi ese e carbonaceous raw materials.
Ose anthracite nepetroleum coke ane humwe huwandu hwezvinhu zvinoshanduka uye zvinoda kuverengerwa.
Iyo coke inogadzira tembiricha yebituminous coke uye metallurgical coke yakakwira zvakanyanya (pamusoro pe1000 ° C), iyo yakaenzana nekushisa kwechoto checalcining muchirimwa chekabhoni.Iyo haichakwanisa calcinate uye inongoda kuomeswa nehunyoro.
Zvisinei, kana bituminous coke nepetroleum coke zvikashandiswa pamwechete zvisati zvaitwa calcining, zvinotumirwa kune calciner kuti calcining pamwe nepetroleum coke.
Natural graphite uye kabhoni dema hazvidi calcination.
Kugadzira: Ndeipi musimboti wekugadzira extrusion?
Izvo zvakakosha zveextrusion process ndezvekuti mushure mekunge paste yapfuura nemumuromo weimwe chimiro pasi pekumanikidzwa, inoumbwa uye yakagomara mupurasitiki kuita isina chinhu ine imwe chimiro uye saizi.
Iyo extrusion molding process inonyanya kuita deformation yepurasitiki maitiro epaste.

Iyo extrusion maitiro epaste inoitwa mukamuri yemidziyo (kana cylinder paste) uye denderedzwa arc nozzle.
Iyo inopisa paste mukamuri yekurodha inofambiswa neyekumashure main plunger.
Iyo gasi iri paste inomanikidzwa kuramba ichidzingwa, iyo paste inoramba ichibatanidzwa uye iyo paste inoenda mberi panguva imwe chete.
Kana iyo paste ichifamba muhumburumbira chikamu chekamuri, iyo paste inogona kutorwa seyakagadzikana kuyerera, uye iyo granular layer inofanana.
Kana iyo paste ichipinda muchikamu cheiyo extrusion nozzle ine arc deformation, iyo paste padyo nemadziro emuromo inoiswa pasi pekupokana kwakanyanya kumberi, zvinhu zvinotanga kukotama, paste yemukati inoburitsa kukurumidza kwakasiyana, iyo yemukati paste pamberi. mberi, zvichiita kuti chigadzirwa pamwe ne radial density haisi yunifomu, saka mu extrusion block.

Kushushikana kwemukati kunokonzerwa nekumhanya kwakasiyana kwemukati nekunze kwemukati kunogadzirwa.
Pakupedzisira, iyo paste inopinda mumutsara deformation chikamu uye inowedzerwa.
Kubika
Kugocha chii?Chinangwa chekugocha ndechei?

Kugocha inzira yekupisa yekupisa umo zvigadzirwa zvakadzvanywa zvinopiswa pane imwe mwero pasi pemamiriro ekuparadzanisa mweya mukati mekudzivirira mukati muchoto.

Chinangwa chekutsigira ndechekuti:
(1) Usasanganise zvinoputika Pazvigadzirwa zvinoshandisa marasha asphalt sebinder, zvingangoita gumi muzana zvinoputika zvinowanzobudiswa mushure mekugochwa. Naizvozvo, mwero wezvigadzirwa zvakagochwa kazhinji uri pasi pe90%.
(2) Binder coking mbishi zvigadzirwa zvakagochwa zvinoenderana nemamwe mamiriro etekinoroji kuita binder coking.A coke network inoumbwa pakati pezvimedu zvakaunganidzwa kuti inyatso batanidza zvese zvakaunganidzwa nehukuru hwakasiyana hukuru, kuitira kuti chigadzirwa chive nehumwe hwemuviri nemakemikari zvimiro. .Pasi pemamiriro akafanana, iyo yakakwirira yekubika, iyo iri nani kunaka.Kubika kwepakati - kupisa asphalt inenge 50%.
(3) Yakagadziriswa fomu yejometri
Mukugadzirwa kwekutsvaira kwezvigadzirwa zvakasvibirira, chiitiko chekunyorova uye binder kutama kwakaitika.Nekuwedzera kwekushisa, coking network inoumbwa, zvichiita kuti zvigadzirwa zviome.Saka, chimiro chayo hachichinje sezvo kutonhora kuchikwira.
(4) Deredza kuramba
Mukugocha, nekuda kwekubviswa kwemhepo inopisa, kubikwa kweasphalt kunogadzira grid coke, kuora uye polymerization yeasphalt, uye kuumbwa kwehexagonal carbon ring plane network network, nezvimwewo, iyo resistivity yakaderera zvikuru.About 10000 x 10-6 mbishi zvigadzirwa resistivity Ω "m, mushure mekugocha ne 40-50 x 10-6 Ω" m, inonzi yakanaka conductors.
(5) Kuwedzera kuderedzwa kwevhoriyamu
Mushure mekugocha, chigadzirwa chinodzikira neinenge 1% mudhayamita, 2% pakureba uye 2-3% muhuwandu.
Imprognation nzira: Sei macerate kabhoni zvigadzirwa?
Iyo mbishi chigadzirwa mushure mekumanikidza kuumbwa ine yakaderera porosity.
Zvisinei, mushure mokugocha zvigadzirwa, chikamu cheasphalt yemarasha chinosvibiswa kuita gasi uye chinopukunyuka, uye chimwe chikamu chiri kunyura mubituminous coke.
Huwandu hweiyo bhituminous coke inogadzirwa idiki zvakanyanya pane yemarasha bhitumeni.Kunyangwe ichidzikira zvishoma mukugocha, akawanda asina kujairika uye madiki pores ane akasiyana pore saizi achiri kuumba muchigadzirwa.
Semuenzaniso, iyo yakazara porosity yezvigadzirwa zvegraphitized kazhinji inosvika 25-32%, uye iyo yezvigadzirwa zvekabhoni kazhinji 16-25%.
Kuvapo kwenhamba yakawanda ye pores inokanganisa zvachose chimiro chemuviri uye chemakemikari ezvigadzirwa.
Kazhinji kutaura, zvigadzirwa zvegraphiti zvine yakawedzera porosity, yakadzikira vhoriyamu density, yakawedzera resistivity, simba remuchina, pane imwe tembiricha ye oxidation rate inokwidziridzwa, corrosion resistance inodzikira zvakare, gasi uye mvura inopinda nyore nyore.
Impregnation inzira yekudzikisa porosity, kuwedzera density, kuwedzera simba rekumanikidza, kuderedza resistative yechigadzirwa chakapedzwa, uye kushandura chimiro chemuviri nemakemikari echigadzirwa.
Graphitization: Chii chinonzi graphitization?
Chii chinangwa che graphitization?
Graphitization inzira yekupisa kupisa kwepamusoro-tembiricha uchishandisa zvigadzirwa zvakabikwa kupisa kusvika pakupisa kwakanyanya munzvimbo yekudzivirira yegraphitization furnace kuita hexagonal kabhoni atomu plane grid grid kushanduka kubva mukupindirana zvisina tsarukano munzvimbo ine mativi maviri-maviri-dimensional kurongeka munzvimbo ine mativi matatu uye ine graphite chimiro.

Zvinangwa zvaro ndezvi:
(1) Kuvandudza kupisa uye magetsi conductivity yechigadzirwa.
(2) Kuvandudza kupisa kutyisa kuramba uye kugadzikana kwemakemikari yechigadzirwa.
(3) Kuvandudza lubricity uye kupfeka kuramba kwechigadzirwa.
(4) Bvisa tsvina uye uvandudze simba rechigadzirwa.

Machining: Sei zvigadzirwa zvekabhoni zvinoda machining?
(1) Kudiwa kwekuvhiyiwa kwepurasitiki

Iyo yakamanikidzwa kabhoni zvigadzirwa zvine humwe saizi uye chimiro zvine madhigirii akasiyana e deformation uye kudhumhana kukuvadzwa panguva yekugocha uye graphitization.Panguva imwecheteyo, mamwe mafiritsi anosungirirwa pamusoro peiyo compressed kabhoni zvigadzirwa.
Iyo haigone kushandiswa pasina mechanical processing, saka chigadzirwa chinofanira kuumbwa uye kugadziridzwa mune yakatarwa geometric chimiro.

(2) Kudiwa kwekushandisa

Zvinoenderana nezvinodiwa nemushandisi pakugadzirisa.
Kana iyo graphite electrode yemagetsi echoto kugadzira simbi ichida kubatanidzwa, inofanirwa kugadzirwa mugomba rine shinda kumativi ese echigadzirwa, uye ipapo maelectrode maviri anofanirwa kubatanidzwa kuti ashandise neakakosha akarukwa joint.

(3) Tekinoroji zvinodiwa

Zvimwe zvigadzirwa zvinoda kugadziridzwa kuita akakosha maumbirwo uye zvirevo zvinoenderana nezvinodiwa zvetekinoroji zvevashandisi.
Kunyange kuderera kwepamusoro kwepamusoro kunodiwa.

Nguva yekutumira: Zvita-10-2020