Njira Zoyeretsera Zitsulo ndi Ntchito Zake
Kuyeretsa zitsulo ndi njira zingapo zopangira zitsulo zomwe cholinga chake ndi kuwonjezera chiyero cha chitsulo kuchokera ku zinthu zopangira zake—kaya ndi miyala, zinthu zokhuthala, kapena njira yoyambira yosungunulira zitsulo (chitsulo chosaphwanyika). Mu ntchito zamafakitale, kuyeretsa kumapitirira kungokhala “kupangitsa chitsulo kukhala choyera kwambiri,” komanso kumaphatikizapo kuchepetsa kuchuluka kwa zonyansa zina kuti zikwaniritse miyezo yofunikira pa ntchito zinazake. Mwachitsanzo, mkuwa wa zingwe zamagetsi umafuna chiyero chapamwamba kuti ugwire bwino ntchito. Pakadali pano, chitsulo chopangidwa ndi alloy chimatha kupirira zinthu zina malinga ngati mphamvu zake zamakina zili zoyenera. Nkhaniyi ikufotokoza njira zazikulu zoyeretsera zitsulo pamodzi ndi zitsanzo za momwe zimagwiritsidwira ntchito m'magawo osiyanasiyana.
N’chifukwa chiyani kuyeretsa zitsulo n’kofunika?
Kusayera kwa zitsulo kungakhudze kwambiri zinthu zakuthupi ndi zamakemikolo, monga kuyendetsa magetsi/kutentha, kukana dzimbiri, mphamvu yokoka, kusinthasintha, ndi kulumikiza kapena kuponyera. Ngakhale zinthu zochepa kwambiri zosayera zingayambitse zolakwika za zinthu, monga kusweka pa kutentha kwina, kusweka mosavuta, kapena kuchepa kwa kukana kwa okosijeni. Chifukwa chake, kuyenga zitsulo ndi gawo lofunika kwambiri pakupanga zinthu—kuyambira migodi ndi kukonza mchere mpaka kusungunula ndi kupanga.
Kupatula kuchita bwino, kuyeretsa kumakhudzanso nkhani zachitetezo ndi zachilengedwe. Zoipa monga sulfure, phosphorous, arsenic, kapena lead zimatha kukhudza kutulutsa mpweya ndi zinyalala, zomwe zimafuna kuti anthu azitsatira malamulo.
1) Kuyeretsa kwa pyrometallurgical (kutengera kutentha kwambiri)
Pyrometallurgy imagwiritsa ntchito kutentha kwambiri kuti ipangitse kuti zinthu ziume, ziume, kapena zichotsedwe pogwiritsa ntchito njira zosinthira ndi madzi ndi slag. Kuyeretsa kwa pyrometallurgy nthawi zambiri kumachitika pambuyo pa njira yoyamba yosungunulira.
a. Kusakaniza bwino ndi kuyeretsa ndi slag
Mu njira imeneyi, zinthu zosafunika zomwe zimasungunuka mosavuta kuposa chitsulo choyambira zimasinthidwa kukhala ma oxides ndikugwidwa ndi slag. Kuwonjezera kwa flux (monga laimu/laimu kuti apange CaO) kumathandiza kumangirira zinthu zosafunika za oxide kukhala slag yomwe ingalekanitsidwe ndi chitsulo chosungunuka.
Zitsanzo za ntchito:
– Kupanga Zitsulo: Njira zoyambira monga Basic Oxygen Furnace (BOF) zimachulukitsa kaboni, silicon, manganese, phosphorous, ndi sulfure. Alkaline slag imathandiza kumangirira phosphorous, kuchepetsa kuchuluka kwake.
– Kuyenga mkuwa: Pa gawo la “kuyenga moto”, mpweya umafufutidwa kuti uchotse zinyalala zina, kenako “kuyeretsa” (kuchepetsa kuwala) kumachitika kuti mpweya womwe uli mu mkuwa usakhale wochuluka.
b. Kusungunuka ndi kusasinthasintha (kutuluka kwa nthunzi)
Zitsulo zina kapena zinthu zodetsedwa zimakhala ndi malo otentha ochepa ndipo motero zimatha kulekanitsidwa kutengera kusiyana kwa kusinthasintha kwa kutentha. Njirayi ndi yoyenera zitsulo monga zinc (Zn) kapena mercury (Hg), komanso kuchotsa zinthu zodetsedwa zodetsedwa.
Zitsanzo za ntchito:
– Kuyeretsa zinki: Njira zina zopangira zinki zimagwiritsa ntchito kusungunuka kuti ziwonjezere chiyero cha zinki wosungunuka.
– Kuchotsa zonyansa zosinthika: Mu njira zina, zonyansa monga cadmium zimatha kulekanitsidwa chifukwa zimakhala zosinthika kwambiri kuposa chitsulo chachikulu.
Ubwino wa pyrometallurgy ndi monga kuchuluka kwa kupanga ndi kuyenerera kwake kukonza zinthu zambiri. Komabe, kuipa kwake ndi monga kufunika kwa mphamvu zambiri komanso kuthekera kwa kutulutsa mpweya (monga SO₂) ngati sikuyendetsedwa ndi njira yowongolera.
2) Kuyeretsa kwa hydrometallurgical (kogwiritsa ntchito yankho)
Hydrometallurgy imagwiritsa ntchito njira za mankhwala mu gawo la yankho, nthawi zambiri kudzera mu magawo atatu akuluakulu: kuchotsedwa kwa madzi, kulekanitsa/kuyeretsa yankho, ndi kubwezeretsa zitsulo monga kupopera kapena kugonjetsa magetsi.
a. Kuchotsa madzi ndi kuyeretsa mayankho
Mchere kapena mcherewo umasungunuka pogwiritsa ntchito asidi, maziko, kapena chinthu chophatikiza. Kenako yankholo limayeretsedwa ku zinyalala pogwiritsa ntchito njira monga kusankha precipitation, kusinthana kwa ma ion, kapena kuchotsa solvent.
Zitsanzo za ntchito:
– Nickel ndi cobalt: Njira zambiri zamakono zimakonza laterite kapena sulfide mwa kuchotsa, kenako zimayeretsa yankho kuti lilekanitse Ni ndi Co.
– Golide: Mu njira yopangira cyanidation, golide amasungunuka ngati chosakaniza, kenako amalekanitsidwa ndi yankho pogwiritsa ntchito activated carbon adsorption ndi masitepe ena.
b. Kuchotsa zosungunulira (SX)
SX imagwiritsa ntchito kusiyana kwa kugwirizana kwa ma ayoni achitsulo pa zinthu zina zachilengedwe, kotero kuti chitsulo chomwe chikufunidwacho chikhoza "kusunthidwa" kuchokera ku gawo lamadzi kupita ku gawo lachilengedwe, kenako nkubwezedwa (kuchotsedwa) kukhala yankho loyera.
Zitsanzo za ntchito:
– Mkuwa (SX-EW): Yankho lochotsa madzi limayeretsedwa ndi SX, kenako mkuwa umachotsedwa kudzera mu electrowinning kuti ukhale cathode yapamwamba kwambiri ya mkuwa.
Hydrometallurgy imaonedwa kuti ndi yosinthasintha ndipo nthawi zambiri imapanga chiyero chapamwamba, koma imafuna kusamala kwambiri ndi mankhwala komanso kuyang'anira bwino madzi otayira.
3) Kuyeretsa kwa electrolytic (kuyeretsa kwa electrolytic ndi kubwezeretsanso magetsi)
Kuyeretsa kwa electrolytic ndi njira yofunika kwambiri popanga zitsulo zoyera kwambiri. Mfundo yake ndikugwiritsa ntchito mphamvu yamagetsi kusungunula chitsulo kuchokera ku anode ndikuchiyikanso pa cathode.
a. Kukonzanso zamagetsi
Anode ndi chitsulo chosayera, cathode ndi pepala lopyapyala la chitsulo choyera, ndipo electrolyte ndi yankho la mchere wa chitsulocho. Chitsulo choyeracho chimagwera pa cathode, pomwe zonyansa zina zimagwa ngati anode kapena zimasungunuka.
Zitsanzo za ntchito:
– Mkuwa: Umapanga ma cathode amkuwa oyera kwambiri (nthawi zambiri amagwiritsidwa ntchito ngati ma conductor amagetsi). Zitsulo zamtengo wapatali monga siliva ndi golide nthawi zambiri zimayikidwa mu anode slime kuti zigwiritsidwe ntchito mobwerezabwereza.
– Nickel: Kuyeretsa kwa electromagnetic kumapanga nickel yapamwamba kwambiri yopangira alloying ndi plating.
b. Kupambana pamagetsi
Mosiyana ndi electrorefining, electrowinning imachotsa chitsulo mwachindunji kuchokera ku yankho la leaching/refining, osati kuchokera ku anode yachitsulo chosaphwanyika.
Zitsanzo za ntchito:
– SX-EW mkuwa, zinc, ndi zitsulo zina zingapo: zimagwiritsidwa ntchito kwambiri chifukwa zimatha kupanga zinthu za cathode zoyera kwambiri.
Ubwino wa njira ya electrolytic ndi kuyera kwapamwamba komanso kuwongolera bwino kapangidwe kake, koma ndalama zamagetsi ndi kufunikira kwa electrolyte yokhazikika ndi zinthu zofunika kwambiri.
4) Kuyeretsa kwapadera kwa kuyera kwambiri
Pazinthu zamagetsi, kuwala, kapena kafukufuku, kuyera kwachitsulo kumatha kufika pa 99,99% (4N) kapena kupitirira apo. Apa ndi pomwe njira zapadera zimagwiritsidwa ntchito.
a. Kuyeretsa malo
Chitsulocho chimasungunuka pamalopo m'dera laling'ono lomwe limayenda motsatira mzere. Zodetsa nthawi zambiri zimasungunuka bwino mu gawo lamadzimadzi kuposa mu cholimba, kotero zimakankhidwira motsatira kayendetsedwe ka dera losungunuka ndikusonkhanitsidwa kumapeto kwa mzere, womwe umadulidwa.
Zitsanzo za ntchito:
– Silicon, germanium, gallium: zofunika kwambiri mumakampani opanga zinthu za semiconductor.
b. Kuyeretsa vacuum
Pakapanikizika kochepa, zinthu zodetsedwa zosinthika zimaphwa mosavuta. Njira imeneyi ndi yothandiza pochepetsa mpweya wosungunuka (hayidrojeni, nayitrogeni) kapena zinthu zodetsedwa zosinthika.
Zitsanzo za ntchito:
- Zitsulo zapadera ndi ma super alloys: kuchotsa mpweya m'malo otayira mpweya kumawonjezera kulimba ndi kuchepetsa porosity.
– Titanium ndi zirconium: nthawi zina, kulamulira mlengalenga n'kofunika kwambiri chifukwa cha momwe zimagwirira ntchito kwambiri ku mpweya ndi nayitrogeni.
5) Kugwiritsa ntchito zotsatira za kuyenga zitsulo m'magawo osiyanasiyana
a. Magetsi ndi zamagetsi
Zitsulo zoyera kwambiri monga mkuwa ndi aluminiyamu zimagwiritsidwa ntchito mu zingwe, mabasi, ndi zigawo za conductor. Kuyera kwambiri ndikofunikira kuti mphamvu ichepe komanso kutentha kukhale kochepa. Mu zamagetsi, zitsulo zoyera kwambiri ndi ma semiconductors zimathandiza magwiridwe antchito a ma transistors, masensa, ndi ma chips.
b. Mayendedwe ndi zomangamanga
Mu zitsulo ndi aluminiyamu, kuyeretsa kumathandiza kuwongolera zinyalala monga sulfure ndi phosphorous, zomwe zingayambitse kusweka. Zotsatira zake zimakhala zinthu zolimba, zolimba komanso zodalirika zoyenera milatho, nyumba, zombo, komanso mafelemu a magalimoto.
c. Makampani opanga mankhwala ndi mphamvu
Ma alloy okhala ndi nickel, chromium, ndi molybdenum amafunika kuwongolera kwambiri kapangidwe kake kuti athe kupirira dzimbiri ndi kutentha kwambiri—monga, mu ma reactor a mankhwala, mapaipi, ma turbine a gasi, ndi malo opangira magetsi. Kuyeretsa kumathandiza kuonetsetsa kuti zinyalala zomwe zimayambitsa dzimbiri sizipitirira malire.
d. Zodzikongoletsera ndi zitsulo zamtengo wapatali
Golide, siliva, ndi platinamu zimayengedwa kuti zipeze magiredi enaake (monga golide wa 24K) kapena kuti zigwiritsidwe ntchito mu zodzikongoletsera. Njira yoyengedwayi imathandizanso kuti zitsulo zamtengo wapatali zibwezeretsedwe kuchokera ku zinyalala zamagetsi ndi matope a anode.
Mapeto
Njira zoyeretsera zitsulo zimaphatikizapo njira zoyeretsera zitsulo, zoyeretsera zitsulo, ndi zamagetsi, komanso njira zapadera monga kuyeretsera malo ndi kuyeretsa vacuum. Kusankha njira kumadalira mtundu wa chitsulo, mawonekedwe a zinthu zopangira, mtundu ndi kuchuluka kwa zonyansa, cholinga cha kuyera, komanso kuganizira zachuma ndi zachilengedwe. M'machitidwe, mafakitale nthawi zambiri amaphatikiza njira zingapo kuti apeze zotsatira zabwino kwambiri. Ndi kuyeretsera koyenera, zitsulo zimatha kukwaniritsa miyezo yapamwamba kwambiri—kuyambira zingwe zamagetsi ndi nyumba zomangira mpaka zigawo za semiconductor—zomwe ndi maziko ofunikira aukadaulo wamakono.
Ngati mukufuna, nditha kusintha nkhaniyi kuti ikhale yokhudza maphunziro (ndi mawu ndi ma diagram a kayendedwe ka njira), kapena kuyang'ana kwambiri pa chitsulo china monga mkuwa, aluminiyamu, kapena nikeli.
