MER GROUP: Hoʻomaka pōkole i ke Kumu o ka Pelletization
I loko o nā mea kanu kila i hoʻohui ʻia i kēia wā, ʻo ka pellet ore ke kaumaha nui -kiʻekiʻe no ka hana ʻana i ka hao. ʻO ke kaʻina hana pelletization ka hana ʻana i ka pauka hao maikaʻi i loko o ka -ikaika kiʻekiʻe, kiʻekiʻe-pellet spherical, e hoʻonā i ka pilikia ʻaʻole hiki ke hoʻouka pololei ʻia ka pauda maikaʻi i loko o ka umu. Ua māhele ʻia kāna kumu hana i ʻehā mau ʻanuʻu: ka pōpō, ka hoʻomaloʻo ʻana a me ka hoʻomaʻamaʻa ʻana, ka - wela wela, a me ka hoʻoluʻu ʻana i nā huahana i hoʻopau ʻia, e hana ana i ke kaʻina hana hoʻololi kino a me ke kemika.
I. Ka Papa Poepoe: Ka Hookumu ana i na Poepoe Omaomao
The balling stage marks the beginning of the pelletization process. The core involves mixing fine iron concentrate powder (with particle size < 0.074mm accounting for >80%), nā mea hoʻopaʻa (e like me ka bentonite) a me ka wai i loko o ka disc a i ʻole ka pahu pelletizer, kahi i hoʻokumu ʻia ai nā pōpō ʻōmaʻomaʻo spherical ma o ka ʻōwili mechanical a me nā ikaika capillary. Ma ke kino, ma lalo o ka hana o ka rotational and centrifugal forces, pili nā ʻāpana concentrate a ulu i ka papa ma ka papa me ke kumu maikaʻi ke kikowaena, e hana ana i nā pōpō ʻōmaʻomaʻo me ke anawaena o 8-16mm. ʻO ke kemika, nā mea hoʻopaʻa a me ka wai e hana i nā alahaka wai ma waena o nā ʻāpana, e hoʻonui i ka ikaika mua o nā pōpō ʻōmaʻomaʻo e hoʻokō i nā koi o ka lawe ʻana a me ka mālama wela.
II. Ka Papa Hoʻomaloʻo a me ka Hoʻomaʻamaʻa ʻana: Dehydration and Consolidation
ʻO nā pōpō Green e komo i ka grate, kahi e hoʻoneʻe ʻia ai ka wai manuahi i ka pauku maloʻo ma 200-400 degere e pale ai i ka haki ʻana i nā mahana kiʻekiʻe, a laila hoʻopau ʻia ka consolidation mua i ka ʻāpana preheating ma 900-1000 degere. I loko o kēia kaʻina, ua hoʻoneʻe ʻia ka magnetite (Fe₃O₄) i nā pōpō ʻōmaʻomaʻo i ka hematite (Fe₂O₃), a ke hana nei ka mea hoʻopaʻa i nā hopena sintering e hana i nā pilina kristal mua, e hoʻomaikaʻi nui i ka ikaika o nā pōpō ʻōmaʻomaʻo a kau i ke kumu no ka ʻai ʻana ma hope.
III. Kiekie -Wāhi Hoʻomoʻa ʻana i ka Mahana: Hoʻoulu hou a me ka hoʻonui ʻana i ka ikaika
Hoʻokomo nā pōpō ʻōmaʻomaʻo preheated i ka rotary kiln a i ʻole grate kiln no ka ʻala ʻana ma 1200-1300 degere, ʻo ia ke kī i ka hana ʻana i nā waiwai o ka pellet ore. Hoʻopili hou ʻia nā ʻāpana Hematite a ulu, e hana ana i kahi ʻano aniani aniani; ʻO nā mea haumia e like me SiO₂ a me CaO i loko o ka concentrate e hana i kahi liʻiliʻi o ka māhele wai, e hoʻopiha ana i nā āpau āpau a hana i kahi iwi hoʻohui paʻa ma hope o ka hoʻoluʻu ʻana, e hōʻoiaʻiʻo ana i ka ikaika anuanu a me ka paʻa wela o ka pellet ore. I kēia manawa, e hōʻoiaʻiʻo i ka hoʻohemo piha ʻana o nā oxides hao, e hoʻomaikaʻi ana i ka pae a me ka hoʻohaʻahaʻa ʻana o ka pellet ore.
IV. Ka Papa Hooluu: Paa Paa Hana
Komo ka -mea wela nui (ma kahi o 1000–1100 degere) i ka annular cooler, kahi e puhi ʻia ai ke ea anu e hoʻomāalili i ka 100–150 degere. ʻO ka hoʻoluʻu wikiwiki e kāohi i ka coarsening kristal, mālama i ka ʻano paʻa a me ka ikaika o ka pellet ore a pale i ka pōʻino i nā mea hana ma hope. Hiki ke ho'ohana hou 'ia ka 'ea - wela wela ma 300–400 degere i ka wā ho'olu'u no ka ho'omalo'o 'ana a me ka ho'oma'ama'a mua 'ana i nā pōpō 'ōma'oma'o, e 'ike ana i ka holo 'ana o ka ikehu a me ka ho'emi 'ana i ka ikehu.
Ma ka hoomalu pono ana i ka wela, ka lewa a me ka manawa o kela a me keia pae, ua hoohuli ke kaʻina hana pelletization i ka pauka hao maikaʻi haʻahaʻa i -kiʻekiʻe kiʻekiʻe. Me ka nui o nā ʻāpana like ʻole a me ka hoʻohaʻahaʻa maikaʻi ʻana, hiki iā ia ke hoʻomaikaʻi i ka maikaʻi o ka hoʻoheheʻe ʻana i ka umu ahi a me ka maikaʻi o ka hao i hoʻoheheʻe ʻia, e lilo ia i loulou kī i ka ʻoihana hao a me ke kila.
