Maitiro ekugadzira zvinhu zvekabhoni iinjiniya yehurongwa inodzorwa zvakasimba, kugadzirwa kwegraphite electrode, zvinhu zvakakosha zvekabhoni, aluminium carbon, zvinhu zvitsva zvekabhoni zvepamusoro hazviparadzanisike nekushandiswa kwezvinhu zvakagadziriswa, michina, tekinoroji, manejimendi yezvinhu zvina zvekugadzira uye tekinoroji ine chekuita nazvo.
Zvinhu zvisina kugadzirwa ndizvo zvinhu zvikuru zvinosarudza hunhu hwezvinhu zvine kabhoni, uye mashandiro ezvinhu zvisina kugadzirwa ndiwo anosarudza mashandiro ezvinhu zvakagadzirwa nekabhoni. Pakugadzira maelectrode eUHP neHP graphite, needle coke yemhando yepamusoro ndiyo sarudzo yekutanga, asiwo asphalt yemhando yepamusoro, asphalt inoisa mishonga. Asi zvinhu zvisina kugadzirwa zvemhando yepamusoro chete, kushaikwa kwemidziyo, tekinoroji, manejimendi uye tekinoroji ine chekuita nazvo, hazvikwanisewo kugadzira electrode yeUHP yemhando yepamusoro, HP graphite.
Chinyorwa chino chinotarisa pane hunhu hwe needle coke yemhando yepamusoro kuti titsanangure mamwe maonero evanhu, kuti vagadziri veneedle coke, vagadziri veelectrode, nemasangano ekutsvaga sainzi vakurukure.
Kunyangwe kugadzirwa kweneedle coke muChina kwave kunonoka kupfuura kwemakambani ekunze, kwave kukura nekukurumidza mumakore achangopfuura uye kwatanga kuoneka. Panyaya yehuwandu hwekugadzirwa, inogona kusangana nezvinodiwa zveneedle coke zveUHP neHP graphite electrodes zvinogadzirwa nemabhizinesi emuno. Zvisinei, kuchine mukaha wakati wandei mumhando yeneedle coke zvichienzaniswa nemakambani ekunze. Kuchinja-chinja kwekushanda kwebatch kunokanganisa kudiwa kweneedle coke yepamusoro mukugadzirwa kweUHP neHP graphite electrode yakakura, kunyanya hapana ineedle coke yepamusoro inogona kusangana nekugadzirwa kwegraphite electrode joint.
Makambani ekunze ane kabhoni anogadzira ma specification makuru eUHP, HP graphite electrode inowanzova sarudzo yekutanga ye petroleum needle coke yepamusoro se coke huru yezvinhu zvakabikwa, mabhizinesi eJapan anoshandisawo mamwe marasha e needle coke sezvinhu zvakabikwa, asi chete nekuda kwe φ 600 mm specification ye graphite electrode. Parizvino, needle coke muChina inonyanya kuve coal series needle coke. Kugadzirwa kwe UHP graphite electrode yepamusoro-soro nemabhizinesi ecarbon kunowanzoenderana ne petroleum series needle coke inounzwa kunze kwenyika, kunyanya kugadzirwa kwemhando yepamusoro pamwe chete ne Japanese Suishima oil series needle coke inounzwa kunze kwenyika uye British HSP oil series needle coke se raw material coke.
Parizvino, needle coke inogadzirwa nemabhizinesi akasiyana-siyana inowanzo enzaniswa ne commercial performance indexes ye foreign needle coke ne conventional performance indexes, dzakadai se ash content, true density, sulfur content, nitrogen content, particle size distribution, thermal expansion coefficient nezvimwewo. Zvisinei, kuchine kushomeka kwemhando dzakasiyana dze needle coke classification kana tichienzanisa nenyika dzekunze. Nokudaro, kugadzirwa kwe needle coke nenzira ye "uniified goods", hakugone kuratidza grade ye high-quality needle coke.
Pamusoro pekuenzanisa mashandiro enguva dzose, makambani ecarbon anofanirwawo kutarisa kutsanangurwa kwe needle coke, senge kupatsanurwa kwe thermal expansion coefficient (CTE), simba rezvikamu, anisotropy degree, expansion data in non-inhibited state uye inhibited state, uye tembiricha iri pakati pe expansion ne contraction. Nekuti aya ma thermal properties e needle coke akakosha zvikuru pakudzora graphitization process mukugadzirwa kwe graphite electrode, hongu, pesvedzero ye thermal properties ye asphalt coke inoumbwa mushure mekugochwa kwe binder ne impregnating agent asphalt haina kubviswa.
1. Kuenzanisa kwe anisotropy ye needle coke
Kugadzirwa kwe graphite electrode ine simba guru repamusoro-soro (Ultra-high power graphite electrode production) anisotropic degree performance analysis inofungidzira hunhu hwe needle coke raw material kana kuti kwete nzira yakakosha yekuongorora, saizi ye anisotropy, hongu, inewo simba pakugadzirwa kwe electrode, huwandu hwe anisotropy yemagetsi hunonyanya kupisa kupfuura huwandu hwe anisotropy yeavhareji yesimba re electrode diki hwakanaka.
Parizvino, kugadzirwa kwecoke yemarasha muChina kwakakura kupfuura kwecoke yepetroleum needle. Nekuda kwemutengo wepamusoro wezvinhu zvakagadzirwa uye mutengo wemakambani ecarbon, zvakaoma kushandisa 100% domestic needle coke mukugadzira electrode yeUHP, ukuwo uchiwedzera chikamu chakati checoke yepetroleum yakakora uye graphite powder kugadzira electrode. Saka, zvakaoma kuongorora anisotropy yecoke yedomestic needle coke.
2. Hunhu hwemutsara uye hwehuwandu hwe needle coke
Kuchinja kwemutsara nehukuru hwe needle coke kunonyanya kuratidzwa mukuita kwegraphite kunogadzirwa neelectrode. Nekuchinja kwetembiricha, needle coke inozowedzera uye inodzikira panguva yekupisa kwegraphite, izvo zvinokanganisa zvakananga kuchinja kwemutsara nehukuru hwe electrode roasted billet mukuita kwegraphite. Izvi hazvina kufanana nekushandiswa kwemhando dzakasiyana dze coke mbishi, mhando dzakasiyana dze needle coke dzinochinja. Uyezve, tembiricha yekuchinja kwemutsara nehukuru hwemhando dzakasiyana dze needle coke ne calcined petroleum coke yakasiyanawo. Nekuziva hunhu uhwu hwe raw coke chete ndipo patinogona kudzora zviri nani uye kugadzirisa kugadzirwa kwe graphite chemical sequence. Izvi zvinonyanya kuoneka mukuita kwe series graphitization.
Kukura kwemutsara kunotanga kana oil needle coke yatanga kupisa, asi tembiricha pakutanga kwekudzikira kwemutsara inowanzova pasi petembiricha yepamusoro ye calcination. Kubva pa1525℃ kusvika 1725℃, kuwedzera kwemutsara kunotanga, uye tembiricha yekudzikira kwemutsara wese yakamanikana, 200℃ chete. Kukura kwekupisa kwekudzikira kwemutsara wese we ordinary delayed petroleum coke yakakura kupfuura ye needle coke, uye coal needle coke iri pakati pezviviri, yakakura zvishoma pane oil needle coke. Mhedzisiro yekuedzwa kweOsaka Industrial Technology Test Institute muJapan inoratidza kuti kana kushanda kwekupisa kwe coke kwakaipa, tembiricha yekudzikira kwemutsara yakakura, kusvika pa500 ~ 600℃ line shrinkage temperature range, uye kutanga kwekudzikira kwemutsara kwakaderera, pa1150 ~ 1200℃ kwakatanga kuitika, izvo zviriwo hunhu hwe ordinary delayed petroleum coke.
Kana hunhu hwekupisa huri nani uye kana needle coke ikanyanya kukura, tembiricha yekudzikira kwemutsetse inoderera. Mamwe mafuta emhando yepamusoro ane needle coke anongosvika 100 ~ 150℃ chete. Zvinobatsira zvikuru kuti makambani ecarbon atungamire kugadzirwa kwegraphitization mushure mekunzwisisa hunhu hwekuwedzera kwemutsetse, kudzikira uye kuwedzerazve kwemhando dzakasiyana dze coke, izvo zvinogona kudzivirira mamwe marara emhando yepamusoro anokonzerwa nekushandisa nzira yechinyakare yekuona.
Nguva yekutumira: Gumiguru-08-2021