Raw abu da kuma masana'antu tsari na graphite lantarki
Graphite electrode wani babban zafin jiki resistant graphite conductive abu samar da man fetur knead, allura coke a matsayin tara kuma coal bitumen a matsayin mai ɗaure, wanda aka samar ta hanyar jerin matakai kamar kneading, gyare-gyare, gasa, impregnation, graphitization da inji aiki. abu.
Wutar lantarki mai graphite muhimmin abu ne mai ɗaukar zafi don yin ƙarfe na lantarki. Ana amfani da na'urar graphite don shigar da makamashin lantarki zuwa tanderun lantarki, kuma ana amfani da yawan zafin jiki da ke haifar da arc tsakanin ƙarshen lantarki da cajin azaman tushen zafi don narkar da cajin yin ƙarfe. Sauran tanderun tamanin da ke narkar da kayan kamar rawaya phosphorus, silicon masana'antu, da abrasives suma suna amfani da lantarki na graphite azaman kayan sarrafawa. Kyawawan halaye na musamman na zahiri da sinadarai na lantarki na graphite kuma ana amfani da su sosai a wasu sassan masana'antu.
Abubuwan da ake amfani da su don samar da lantarki na graphite sune coke na man fetur, coke na allura da farar kwal.
Coke Petroleum samfuri ne mai ƙonewa da aka samu ta hanyar toka ragowar kwal da farar mai. Launi baƙar fata ne kuma mai ƙyalƙyali, babban abun ciki shine carbon, kuma abun cikin ash yana da ƙasa sosai, gabaɗaya ƙasa da 0.5%. Coke Petroleum na cikin nau'in carbon da aka zayyana cikin sauƙi. Coke Petroleum yana da fa'idar amfani da yawa a masana'antar sinadarai da ƙarfe. Yana da babban albarkatun kasa don samar da samfuran graphite na wucin gadi da samfuran carbon don aluminium electrolytic.
Ana iya raba coke na man fetur zuwa nau'i biyu: danyen coke da kuma calcined coke bisa ga yanayin zafin zafi. Tsohon coke na man fetur da aka samu ta hanyar jinkirta coking yana ƙunshe da adadi mai yawa na rashin ƙarfi, kuma ƙarfin injin yana da ƙasa. Ana samun coke calcined ta calcination na danyen coke. Yawancin matatun mai a kasar Sin suna samar da coke ne kawai, kuma ana gudanar da ayyukan sarrafa sinadarin a cikin masana'antar carbon.
Ana iya raba coke na man fetur zuwa babban sulfur coke (wanda ya ƙunshi fiye da 1.5% sulfur), matsakaicin sulfur coke (wanda ya ƙunshi 0.5% -1.5% sulfur), da ƙananan sulfur coke (wanda ya ƙunshi ƙasa da 0.5% sulfur). Samar da na'urorin lantarki na graphite da sauran samfuran graphite na wucin gadi ana samarwa gabaɗaya ta amfani da ƙaramin coke na sulfur.
Allura coke wani nau'i ne na coke mai inganci tare da bayyananniyar nau'in fibrous, ƙarancin haɓakar haɓakar zafin jiki da sauƙin zane. Lokacin da coke ya karye, ana iya raba shi zuwa siriri mai siriri bisa ga rubutu (rashin yanayin gaba ɗaya yana sama da 1.75). Ana iya lura da tsarin fibrous anisotropic a ƙarƙashin na'ura mai ƙima, don haka ana kiranta coke na allura.
Anisotropy na physico-mechanical Properties na allura coke a bayyane yake. Yana da kyau lantarki da thermal watsin a layi daya zuwa dogon axis shugabanci na barbashi, da kuma coefficient na thermal fadada ne low. A lokacin da extrusion gyare-gyare, da dogon axis na mafi barbashi an shirya a cikin extrusion shugabanci. Don haka, coke na allura shine mabuɗin albarkatun ƙasa don kera manyan lantarki ko ultra-high-power graphite electrodes. The graphite lantarki samar yana da low resistivity, kananan thermal fadada coefficient da kyau thermal girgiza juriya.
An raba coke na allura zuwa coke na tushen mai wanda aka samar daga ragowar man fetur da kuma coke mai tushen kwal da aka samar daga albarkatun mai da aka tace.
Coal kwal na daya daga cikin manyan kayayyakin sarrafa kwal mai zurfi. Yana da cakuda hydrocarbons iri-iri, baƙar fata a babban zafin jiki, mai ƙarfi ko ƙarfi a babban zafin jiki, babu tsayayyen wurin narkewa, tausasa bayan dumama, sannan narke, tare da ƙarancin 1.25-1.35 g/cm3. Dangane da yanayin laushinta, an raba shi zuwa ƙananan zafin jiki, matsakaicin zafin jiki da matsanancin zafin jiki. Matsakaicin yawan zafin jiki na kwalta shine 54-56% na kwalta kwal. Abubuwan da ke tattare da kwal na kwal yana da matukar rikitarwa, wanda ke da alaƙa da kaddarorin kwal da abubuwan da ke cikin heteroatoms, kuma tsarin sarrafa coking da yanayin sarrafa kwal ɗin ya shafa. Akwai alamomi da yawa don siffanta farar kwalta, irin su bitumen softening point, toluene insolules (TI), quinoline insolules (QI), coking values, and coal pitch rheology.
Ana amfani da kwalta kwal a matsayin mai ɗaurewa da mai ciki a cikin masana'antar carbon, kuma aikinta yana da babban tasiri akan tsarin samarwa da ingancin samfuran samfuran carbon. Kwalta mai ɗaure gabaɗaya tana amfani da matsakaita-zazzabi ko matsakaita-zazzabi gyara kwalta mai matsakaicin matsakaiciyar laushi, ƙimar coking mai girma, da babban guduro β. Wakilin impregnating shine kwalta mai matsakaicin zafin jiki yana da ƙarancin laushi, ƙaramin QI, da kyawawan kaddarorin rheological.
Lokacin aikawa: Satumba 23-2019