Ukucutshungulwa Kwensimbi Ye-Nickel Kwezicelo Zamakhemikhali
I-Nickel iyinsimbi ebalulekile embonini yanamuhla, enezinhlelo zokusebenza ezisukela ekukhiqizweni kwensimbi engagqwali kuya ekuvuseleleni ukusabela okuhlukahlukene kwamakhemikhali. Ngaphambi kokuba i-nickel isetshenziswe ekusetshenzisweni kwamakhemikhali, kumele idlule ochungechungeni lwezinqubo zokucubungula eziyinkimbinkimbi nezisezingeni eliphezulu. Lesi sihloko sizochaza kabanzi inqubo yokucubungula insimbi ye-nickel, kusukela ekumbeni kuya ekusetshenzisweni kwayo ekusetshenzisweni kwamakhemikhali.
1. Ukumbiwa Nokumbiwa Kwamaminerali
Isinyathelo sokuqala ekucutshungulweni kwe-nickel ukukhipha insimbi ku-nickel ore. I-nickel ingatholakala ezinhlotsheni ezimbili eziyinhloko ze-ore: i-laterite kanye ne-sulfide. Uhlobo ngalunye lwe-ore ludinga indlela ehlukile yokukhipha.
I-Laterite Ore
Amatshe e-Laterite avame ukutholakala ezindaweni ezishisayo nezishisayo futhi abangelwa ukuguguleka kwamatshe acebile nge-magnesium ne-iron. I-Nickel kumatshe e-laterite ivame ukuhlotshaniswa namaminerali e-oxide njenge-limonite ne-garnierite. Ukukhishwa kwe-nickel ku-laterite kuvame ukuhilela izindlela ze-pyrometallurgical kanye ne-hydrometallurgical.
– I-Pyrometallurgy: Kuhilela ukufudumeza i-ore ye-laterite emazingeni okushisa aphezulu ukuze kuncibilikiswe futhi kuqhunyiswe i-nickel. Le nqubo ivame ukudinga ukusetshenziswa kwesithando sikagesi.
– I-Hydrometallurgy: Kufaka phakathi inqubo ye-High Pressure Acid Leach (HPAL), ehilela ukusetshenziswa kwe-hydrochloric noma i-sulfuric acid ekucindezelweni okuphezulu ukuze kuncibilikiswe i-nickel kusuka ku-ore. I-nickel ibe isihlukaniswa kusetshenziswa amasu okukhipha imvula noma i-solvent.
I-Sulfide Ore
Ama-ore e-sulfide avame kakhulu ezindaweni ezibandayo futhi ngokuvamile aqukethe i-nickel ngesimo se-mineral pentlandite. Inqubo esetshenziswa ukukhipha i-nickel kuma-ore e-sulfide yile:
– Ukushiswa: Ama-ore e-sulfide ashiswa emoyeni ukuze aguqule iningi lama-sulfide abe ama-oxide.
– Ukuhlanzwa: Okulandelayo, i-ore eshisiwe iyahlanzwa ukuze kuncibilikiswe i-nickel kanye nezinye izimbiwa eziyigugu. Ukuhlanzwa kuvame ukwenziwa nge-sulfuric acid.
– Ukuhlanzwa: Isixazululo esiqukethe i-nickel sibe sesicutshungulwa kabanzi ngezindlela ezahlukene zokuhlanza njengokunqoba ngogesi noma ukuchithwa kwamakhemikhali ukuze kutholakale i-nickel emsulwa.
2. Ukucwengisiswa kweNickel
I-nickel ekhishwe ku-ore ayihlanzekile ngokushesha futhi idinga ukucutshungulwa okwengeziwe ukuze kususwe ukungcola futhi kutholakale i-nickel emsulwa kakhulu. Ezinye izindlela zokuhlanza i-nickel zifaka:
I-Electrolysis
Inqubo ye-electrolysis yenzeka esitokisini se-electrolytic, lapho insimbi ye-nickel ifakwa khona kusuka kusisombululo sikasawoti we-nickel ku-cathode. I-Electrolysis iyindlela ephumelela kakhulu yokukhiqiza i-nickel emsulwa kakhulu, ngokuvamile engaphezu kuka-99,9%.
Ukucwengisisa yi-Hydrometallurgy
Izinqubo ze-hydrometallurgical zingasetshenziswa futhi ekucwengisiseni i-nickel. Lobu buchwepheshe buvame ukuhilela ukusetshenziswa kwezinyibilikisi nezinye izinto zamakhemikhali ukususa ukungcola ku-nickel.
– Ukukhishwa Kwe-Solvent: I-Nickel ikhishwa esixazululweni sokukhipha ngokusebenzisa indlela yokukhipha i-solvent, lapho i-nickel idluliselwa esigabeni se-organic bese ikhishwa kusukela kuleso sigaba.
– Ukunciphisa Amakhemikhali: Le ndlela isebenzisa i-ejenti yokunciphisa ukuhlukanisa i-nickel kwisisombululo esiqukethe ezinye izinsimbi.
3. Inqubo Yokucubungula I-Nickel Yezicelo Zamakhemikhali
I-nickel ehlanziwe ibe isiguqulwa ibe yizinhlobo ezifanele ukusetshenziswa kwamakhemikhali ahlukahlukene. Izinqubo ezibalulekile kulesi sigaba zifaka phakathi ukukhiqizwa kwamakhemikhali e-nickel kanye nokucutshungulwa okuqhubekayo.
Ukukhiqizwa Kwe-Nickel Compound
I-nickel ibalulekile ekukhiqizweni kwamakhemikhali ahlukahlukene, njenge-nickel sulfate (NiSO4), i-nickel chloride (NiCl2), kanye ne-nickel carbonate (NiCO3). Uchungechunge olujwayelekile lokukhiqizwa kwala makhemikhali lumi kanje:
– Ukuncibilika: I-nickel noma i-nickel oxide emsulwa incibilika ku-asidi efanelekile (isb., i-sulfuric acid ye-nickel sulfate).
– Ukuna: Isixazululo se-nickel esincibilikisiwe sibe sesiphathwa nge-ejenti yokunamisa ukuze sakhe inhlanganisela ethile. Isibonelo, ukwenza i-nickel carbonate, i-sodium carbonate ingafakwa kwisisombululo se-nickel sulfate.
– Ukuhlanzwa Nokuhluzwa: Inhlanganisela ye-nickel ephumayo iyahlungwa, igezwe, bese yomiswa ukuze kutholakale umkhiqizo omsulwa. Ubuchwepheshe obufana nokuvuselelwa kabusha kanye nokuhluzwa kwendawo ngezinye izikhathi busetshenziswa ukuthuthukisa ubumsulwa bomkhiqizo we-nickel.
Ukucubungula i-Nickel kwama-Catalyst
I-Nickel isetshenziswa futhi njengesikhuthazi ekusebenzelaneni kwamakhemikhali amaningi ezimbonini, okuhlanganisa i-hydrogenation kanye nokuguqulwa kwe-methane. Ukuze kukhiqizwe isikhuthazi esisebenzayo, i-nickel idinga ukuhlanganiswa nezinto zokusekela bese icutshungulwa kabanzi:
– Ukuna: I-nickel ifakwa ezintweni ezisekelayo ezifana ne-alumina noma i-silica ukuze kwandiswe indawo engaphezulu ye-nickel kanye nomsebenzi wayo wokuvuselela.
– Ukunciphisa: I-nickel efakiwe iyancishiswa ukuze iguqulwe ibe yisimo sensimbi esebenzayo.
– Ukuqalisa: Ama-catalyst e-nickel avame ukudinga ukuqalisa ukusebenza kokushisa ngaphambi kokusebenzisa ukuze kufezwe izimo zokusebenza ezifanele.
4. Imizamo Yokuphatha Nomthelela Wezemvelo
Inqubo yokucubungula i-nickel inemithelela eminingana kwezemvelo okumele iphathwe kahle. Ukumbiwa kwe-nickel nokuhluzwa kwayo kuvame ukuholela ekukhishweni kwamagesi okushisa ukushisa, imfucuza enobuthi, kanye nokusetshenziswa kwamandla amakhulu. Ngakho-ke, imboni ithathe izinyathelo ezahlukene zokunciphisa imvelo, okuhlanganisa:
– Ukuphathwa Kwemfucuza: Ukuphathwa kwemfucuza eqinile neyoketshezi kusukela enkambisweni yokucubungula kubaluleke kakhulu ukugwema ukungcoliswa kwenhlabathi namanzi.
– Ukusebenza Kahle Kwamandla: Ukusebenzisa ubuchwepheshe bokonga amandla kanye nemithombo yamandla avuselelekayo ukunciphisa umthelela wekhabhoni enqubweni yokucubungula.
– Rekabro: Ukuvuselelwa kwezindawo zokumba ngemva kokusebenza kuqediwe ukuze kubuyiselwe imvelo yemvelo.
Isiphetho
Ukucubungula insimbi ye-nickel kuyinqubo eyinkimbinkimbi ehlanganisa izigaba ezahlukene, kusukela ekumbeni nasekukhipheni kuya ekucwengisisweni, futhi ekugcineni ukuguqulwa kube umkhiqizo olungele ukusetshenziswa ngamakhemikhali. Isigaba ngasinye sidinga ubuchwepheshe nolwazi olukhethekile ukulawula ikhwalithi yomkhiqizo kanye nomthelela emvelweni. Ngokusungula izinto ezintsha namasu afanele, i-nickel ingacutshungulwa kahle futhi inobungani nemvelo ukuze isekele izimboni ezahlukene zamakhemikhali kanye nezinye izinhlelo zokusebenza ezibalulekile empilweni yanamuhla.
