Nā mea waiwai: He aha nā mea maka i hoʻohana ʻia no ka hana kalapona?
I ka hana kalapona, hiki ke hoʻokaʻawale ʻia nā mea maka i hoʻohana pinepine ʻia i nā mea kalapona paʻa a me ka binder a me ka impregnating agent.
Loaʻa nā mea waiwai kalapona paʻa i ka petroleum coke, bituminous coke, metallurgical coke, anthracite, natural graphite a me graphite scrap, etc.
ʻO ka binder a me ka impregnating agent ka lanahu pitch, coal tar, anthracene oil and synthetic resin, etc.
Eia kekahi, hoʻohana ʻia kekahi mau mea kōkua e like me ke one quartz, metallurgical coke particles a me ka pauka coke i ka hana ʻana.
ʻO kekahi mau huahana kalapona kūikawā a me ka graphite (e like me ka carbon fiber, activated carbon, pyrolytic carbon and pyrolytic graphite, glass carbon) i hana ʻia mai nā mea kūikawā ʻē aʻe.
Calcination: He aha ka calcination? He aha nā mea maka e pono ai ke calcined?
ʻO ke kaʻina hana o ka mālama ʻana i ka wela ua kapa ʻia ʻo calcination.
ʻO ka Calcination ke kaʻina hana wela mua i ka hana kalapona.Hoʻololi ka helu ʻana i nā ʻano hoʻololi i ke ʻano a me nā waiwai kino a me nā kemika o nā ʻano mea maka kalapona.
He kiʻekiʻe ke kiʻekiʻe (ma luna o 1000°C) ka mahana o ka coke bituminous coke a me ka coke metallurgical, e like me ka mahana o ka umu calcining i loko o ka mea kanu kalapona.ʻAʻole hiki ke calcinate hou a pono e hoʻomaloʻo wale ʻia me ka wai.
Eia naʻe, inā hoʻohana pū ʻia ka coke bituminous a me ka coke petroleum ma mua o ka hoʻopaʻa ʻana, e hoʻouna ʻia lākou i ka calciner no ka hoʻoheheʻe ʻana me ka petroleum coke.
ʻAʻole pono ka graphite maoli a me ke kalapona ʻeleʻele i ka calcination.
ʻO ke kaʻina hana hoʻoheheʻe extrusion ka nui o ke kaʻina deformation plastic o ka paʻi.
Lawe ʻia ke kaʻina hana extrusion o ka paʻi i loko o ke keʻena waiwai (a i ʻole ka cylinder paste) a me ka nozzle arc circular.
ʻO ka paʻi wela i loko o ke keʻena hoʻouka e alakaʻi ʻia e ka plunger nui hope.
Hoʻokuʻu mau ʻia ke kinoea i loko o ka paʻi, hoʻopaʻa mau ʻia ka paʻi a neʻe ka paʻi i mua i ka manawa like.
Ke neʻe ka paʻi i loko o ka ʻāpana cylinder o ke keʻena, hiki ke manaʻo ʻia ka paʻi e like me ke kahe paʻa, a ʻo ka papa granular ke ʻano like.
Ke komo ka pāpaʻi i ka ʻāpana o ka nozzle extrusion me ka deformation arc, ʻo ka paʻi kokoke i ka paia waha e pili ana i ka nui o ka friction kū'ē i mua, hoʻomaka ka mea e kūlou, ʻo ka paʻi i loko e hoʻopuka i nā wikiwiki holomua ʻē aʻe, ka mua o ka paʻi i loko. i mua, ka hopena o ka huahana ma ka radial density ʻaʻole like, pēlā i ka poloka extrusion.
ʻO ka hope, komo ka paʻi i ka ʻāpana deformation linear a hoʻopau ʻia.
ʻO ka hoʻomoʻa ʻana he hana hoʻomaʻamaʻa wela kahi e wela ai nā huahana maka i hoʻopaʻa ʻia ma kahi ʻano ma lalo o ke kūlana o ka hoʻokaʻawale ʻana i ka ea i loko o ka mea pale i loko o ka umu.
Ma ke kaʻina hana ʻai, ma muli o ka hoʻopau ʻia ʻana o nā volatiles, ʻo ka coking o ka asphalt e hana i kahi coke grid, ka decomposition a me ka polymerization o ka asphalt, a me ka hoʻokumu ʻana o kahi pūnaewele nui hexagonal carbon apo plane, etc., ua emi nui ka resistivity. About 10000 x 10-6 mau huahana maka resistivity Ω “m, ma hope o ka ʻala ʻana ma 40-50 x 10-6 Ω” m, i kapa ʻia nā conductors maikaʻi.
Ma hope o ka ʻai ʻana, emi ka huahana ma kahi o 1% ka anawaena, 2% ka lōʻihi a me 2-3% ka nui.
Eia nō naʻe, ma hope o ka ʻala ʻana i nā huahana maka, ua hoʻoheheʻe ʻia kahi ʻāpana o ka asphalt lanahu i ke kinoea a pakele, a ʻo kekahi ʻaoʻao e coke ana i ka bituminous coke.
ʻOi aku ka liʻiliʻi o ka nui o ka coke bituminous ma mua o ka bitumen lanahu.ʻOiai e emi iki ana ia i ke kaʻina hana ʻana, nui nā pores ʻano ʻole a me nā pores liʻiliʻi me ka nui o nā pore ʻokoʻa ke ʻano i loko o ka huahana.
No ka laʻana, hiki i ka 25-32% ka nui o ka porosity o nā huahana graphitized, a ʻo ka nui o nā huahana kalapona he 16-25%.
ʻO ka loaʻa ʻana o ka nui o nā pores e hoʻopilikia i nā waiwai kino a me nā kemika o nā huahana.
Ma ka ʻōlelo maʻamau, ʻo nā huahana graphitized me ka hoʻonui porosity, hoʻemi i ka nui o ka nui, hoʻonui i ka resistivity, ikaika mechanical, ma kahi mahana o ka oxidation rate e hoʻokē ʻia, hoʻemi ʻia ke kūpaʻa corrosion, ʻoi aku ka maʻalahi o ke kinoea a me ka wai.
ʻO ka Impregnation kahi kaʻina e hōʻemi ai i ka porosity, hoʻonui i ka density, hoʻonui i ka ikaika compressive, hoʻemi i ka resistivity o ka huahana i hoʻopau ʻia, a hoʻololi i nā waiwai kino a me nā kemika o ka huahana.
ʻO kāna mau pahuhopu:
(1) Hoʻonui i ka wela a me ka uila o ka huahana.
(2) No ka hoʻomaikaʻi ʻana i ke kūpaʻa haʻalulu wela a me ke kūpaʻa kemika o ka huahana.
(3) E hoʻomaikaʻi i ka lubricity a me ka pale ʻana o ka huahana.
(4) Wehe i nā haumia a hoʻomaikaʻi i ka ikaika o ka huahana.
ʻO nā huahana kalapona i hoʻopaʻa ʻia me kekahi nui a me ke ʻano he ʻokoʻa nā pae o ka deformation a me ka hoʻopōʻino ʻana i ka wā e kālua ʻia ai a me ka graphitization.I ka manawa like, ua hoʻopaʻa ʻia kekahi mau mea hoʻopihapiha ma ka ʻili o nā huahana kalapona paʻa.
ʻAʻole hiki ke hoʻohana ʻia me ka ʻole o ka hana mechanical, no laila pono e hana ʻia ka huahana a hana ʻia i kahi ʻano geometric kikoʻī.
(2) Pono e hoʻohana
E like me nā koi o ka mea hoʻohana no ka hana.
Inā pono e hoʻopili ʻia ka graphite electrode o ka umu hao kila, pono e hana ʻia i loko o ka lua threaded ma nā ʻaoʻao ʻelua o ka huahana, a laila pono e hoʻopili ʻia nā electrodes ʻelua e hoʻohana me ka hui ʻana o nā kaula kūikawā.
(3) Nā koi ʻenehana
Pono e hana ʻia kekahi mau huahana i nā ʻano kūikawā a me nā kikoʻī e like me nā pono ʻenehana o nā mea hoʻohana.
Pono ʻia ka ʻeleʻele haʻahaʻa.
Ka manawa hoʻouna: Dec-10-2020