Izimiso Nezindlela Zokucubungula Insimbi Ensimbi
Ukucubungula i-ore yensimbi kuwuchungechunge lwezinqubo zobunjiniyela ezisetshenziselwa ukuguqula izinto ezimbiwe (i-ore) zibe imikhiqizo enenani eliphezulu, njengezinto ezigxilile, izinsimbi ezihlanzekile, noma ama-alloy ensimbi. I-ore esanda kumbiwa ngokuvamile ixutshwa nokungcola (i-gangue), iyahlukahluka ngobukhulu, futhi inokuqukethwe kwensimbi okungahlangabezani nezidingo zezimboni. Ngakho-ke, izimiso zesayensi nezindlela zokucubungula ezifanele ziyadingeka ukuze kufezwe isivuno esikhulu sensimbi, izindleko ezisebenzayo, kanye nokuphatha imiphumela yemvelo.
Izimiso Eziyisisekelo Zokucubungula Insimbi Ensimbi
1. Umehluko phakathi kwezakhiwo zomzimba nezamakhemikhali
Ingqikithi yokucubungula i-ore ukusebenzisa umehluko wezakhiwo phakathi kwamaminerali abalulekile kanye nokungcola. Lokhu kungafani kungafaka phakathi ubuningi, amandla kazibuthe, izakhiwo zikagesi, usayizi wezinhlayiya, izakhiwo zomphezulu (ongamanzi/ongamanzi), ngisho nokusabela kwamakhemikhali. Ngokubona izakhiwo ezivelele zamaminerali, opharetha bangakhetha indlela yokuhlukanisa ephumelela kakhulu.
2. Ukukhululwa Kwezimbiwa
Ukukhululwa yisigaba lapho amaminerali ayigugu ekhishwa khona ekungcoleni, okuvumela ukuthi ahlukaniswe. Ukukhululwa kuvame ukufezwa ngokushintsha (ukuchoboza nokugaya). Izinga lokukhululwa libalulekile empumelelweni yokuhlukanisa; uma usayizi mkhulu kakhulu, amaminerali ahlala "evalekile," okwenza ukuhlukaniswa kube nzima. Kodwa-ke, uma usayizi umuhle kakhulu, izindleko zamandla ziyanda futhi ingozi yokulahleka kwensimbi ezinsikeni iyanda. Ngakho-ke, ukulungiswa kosayizi kubalulekile.
3. Ibhalansi phakathi kokululama kanye nebanga
Ekucutshungulweni kwensimbi, kunezinhloso ezimbili eziyinhloko: ukubuyisa (iphesenti lensimbi etholakele) kanye nezinga (okuqukethwe kwensimbi emkhiqizweni). Lokhu okubili kuvame ukuhlobana ngokuphambene: uma izinga liphezulu, ukubuyisa kuphansi, kanye nokuphambene nalokho. Umkhuba wemboni ugxila endaweni yokusebenza efanele, kucatshangelwa amanani ezimpahla, izindleko zokusebenza, kanye nemininingwane yomshini wokuncibilikisa noma wokuhlanza.
4. Ukusebenza Kahle Kwamandla Nokusetshenziswa Kahle Kwamanzi
I-Comminution ingenye yabathengi bamandla abakhulu ezitshalweni zokucubungula amaminerali. Amanzi ayadingeka futhi ekuhlukanisweni, ukuntanta, kanye nokuthuthwa kwe-slurry. Izimiso zesimanje zigcizelela ukusebenza kahle kwamandla ngokukhetha imishini efanele (isb., i-HPGR, i-SAG mill) kanye nokusebenza kahle kwamanzi ngokusebenzisa inqubo yokuvuselela amanzi kanye nokuphathwa kwe-tailings.
5. Ukuphepha Nokuphathwa Kwemvelo
Ukucubungula i-ore kukhiqiza imfucuza ngesimo sezinsalela, uthuli, kanye nokugeleza kwamanzi emigodini ye-asidi okungenzeka. Izimiso ezibalulekile zifaka phakathi ukunciphisa ukukhishwa kwezinto eziyingozi, ukulawula i-pH kanye nezinsimbi ezincibilikisiwe, kanye nokuphatha izinsalela ngokuphephile. Ukuphepha emsebenzini nakho kubalulekile, njengoba izinqubo eziningi zihilela imishini ejikelezayo, ukucindezela okuphezulu, kanye namakhemikhali.
Izindlela Eziyinhloko Zokucubungula Insimbi Ensimbi
Ngokuvamile, ukucutshungulwa kwensimbi kungahlukaniswa ngamaqembu amathathu amakhulu: ukucutshungulwa ngokomzimba (ukugqoka amaminerali), i-pyrometallurgy, kanye ne-hydrometallurgy. Empeleni, ukugeleza kwenqubo kuvame ukuba yinhlanganisela yezindlela eziningana.
1. Ukucubungula Okungokwenyama (Ukuzuza)
Ukucubungula ngokomzimba kuhlose ukukhiqiza ukugxila okusezingeni eliphezulu ngaphambi kokungena esigabeni sokukhipha insimbi.
a. Ukuchoboza Nokugaya
– Ukuchoboza kwenziwa ukuze kuncishiswe usayizi wetshe eliyigugu kusuka ezingcezwini ezinkulu kuya kusayizi ongaphathwa yifektri.
– Ukugaya kusebenzisa umshini wokugaya ukukhiqiza usayizi omncane ukuze kukhululwe amaminerali ayigugu kakhulu.
Imishini evamile: i-jaw crusher, i-cone crusher, i-ball mill, i-rod mill, i-SAG mill. Lesi sigaba sivame ukuhambisana nokuhlukaniswa kusetshenziswa izikrini noma ama-hydrocyclone ukuhlukanisa osayizi bezinhlayiya.
b. Ukuhlukaniswa Kwamandla Adonsela Phansi
Le ndlela isebenzisa umehluko wobuningi phakathi kwamaminerali abalulekile kanye nokungcola. Ifaneleka kuma-ore anamaminerali asindayo njengegolide elikhululekile, i-cassiterite (SnO₂), kanye namanye amaminerali ensimbi.
Imishini: i-jig, i-spiral concentrator, itafula lokushukumisa, ibhokisi lokucwilisa, kanye ne-centrifugal concentrator. Izinzuzo zayo ukuthi ilula kakhulu futhi ayidingi amakhemikhali amaningi, kodwa ukusebenza kwayo kunciphisa kakhulu ezinhlayiyeni ezincane kakhulu.
c. Ukuhlukaniswa Kwamagnetic
Isetshenziselwa amaminerali anezakhiwo zikagesi, njenge-magnetite, kanye nokuhlukanisa ukungcola kwensimbi kwamanye ama-ore ezimboni. Kukhona ukuhlukaniswa kukagesi okunamandla aphansi naphezulu kuye ngohlobo lwamaminerali.
Imishini: isihlukanisi sikamazibuthe sedrama, isihlukanisi sikamazibuthe esine-gradient ephezulu.
d. Ukuntanta (Ukuntanta Okunegwebu)
I-Flotation iyindlela esetshenziswa kakhulu kuma-sulfide ensimbi njengethusi, i-lead, i-zinc, ne-nickel, kanye namaminerali athile e-oxide. Lo mgomo usebenzisa umehluko ezimpahleni zangaphezulu: amaminerali athile enziwa abe yi-hydrophobic, ewavumela ukuthi anamathele kuma-bubble omoya futhi antante njengegwebu, kuyilapho ukungcola kuhlala ku-pulp.
Ama-reagent abalulekile: umqoqi, i-frother, i-modifier (i-pH regulator), i-depressant, i-activator. Ukuntanta kuyaguquguquka kakhulu, kodwa kudinga ukulawulwa okuqinile kwamakhemikhali nokusebenza.
e. Ukuhlukaniswa Okusekelwe Kusayizi (Usayizi)
Ngezinye izikhathi, umehluko ngobukhulu bezinhlayiya ngemva kokuguqulwa ubalulekile ngokwanele ukuthi ukuhlukaniswa okulula ngokuhlola noma ukuhlukaniswa kusiza ekuthuthukiseni ukusebenza kahle kwenqubo elandelayo. Ukulinganisa akuvamile ukusebenza kodwa ukwandisa ibanga, kodwa kubalulekile njengesinyathelo esisekelayo.
2. I-Pyrometallurgy (Ukukhipha ngokushisa okuphezulu)
I-pyrometallurgy inqubo yokukhipha izinsimbi kusetshenziswa amazinga okushisa aphezulu, ngokuvamile ehilela ukusabela kokunciphisa i-oxidation.
a. Ukugaya kanye nokuthosa
– Ukushisa i-ore kushisa i-ore ukuze kususwe amanzi, i-CO₂, noma izingxenye eziguquguqukayo.
– Ukuthosa kukhipha ama-sulfide abe ama-oxide kanye ne-SO₂, okulungiselela i-ore ukuthi incibilikiswe noma ikhishwe.
Isibonelo: ukuthosa ama-concentrates ethusi noma e-zinc sulfide.
b. Ukuncibilikisa
Ukuncibilikisa kuhilela ukuncibilikisa i-concentrate esithandweni somlilo ukuze kuhlukaniswe insimbi noma i-matte (ingxube ye-metal sulfide) ku-slag. Ama-fluxes afana ne-silica noma i-lime ayengezwa ukubopha ukungcola.
Isibonelo: ukuncibilikisa ithusi kukhiqiza i-copper matte ephinde icwengisiswe.
c. Ukuguqulwa Nokucwengisiswa Kokushisa
Insimbi engacwebezelayo noma engacwebezeli ngokuvamile isaqukethe ukungcola. Inqubo yokuguqula i-oxidize lokhu kungcola, ikuhlukanise njenge-slag noma igesi. Izinyathelo ezengeziwe zingafaka phakathi ukuhluzwa komlilo noma ukuhluzwa ngogesi ukuze kutholakale ubumsulwa obuphezulu.
Izinzuzo ze-pyrometallurgy amazinga enqubo asheshayo kanye nokufaneleka kokusetshenziswa okukhulu, kodwa izindleko zamandla ziphezulu futhi ukukhishwa kwegesi kumele kulawulwe.
3. I-Hydrometallurgy (Ukukhishwa Kwesisombululo)
I-Hydrometallurgy isebenzisa ukusabela kwamakhemikhali esigabeni soketshezi ukuncibilikisa izinsimbi bese izihlukanisa nesisombululo.
a. Ukuhlanzwa
Ukuvuza kuncibilikisa insimbi kusuka ku-ore noma kugxile kusetshenziswa izinyibilikisi ezithile.
– Kwe-copper oxide: isixazululo se-sulfuric acid (H₂SO₄).
– Ngegolide: i-cyanidation (NaCN) ngokulawulwa kwe-pH, noma ezinye izindlela ezifana ne-thiosulfate ezimweni ezithile.
– Nge-nickel laterite: i-leaching ephezulu yokucindezela (HPAL) kusetshenziswa i-asidi ekushiseni okuphezulu kanye nokucindezela.
b. Ukuhlukaniswa Nokuhlanzwa Kwezixazululo
Ngemva kokukhipha i-leaching, isixazululo esicebile ngensimbi (isixazululo se-leach esikhulelwe) sicutshungulwa yi:
– Ukukhishwa kwe-solvent (SX): kudlulisela ama-ion ensimbi esigabeni se-organic.
– Ukushintshaniswa kwama-ion: i-resin ibamba ama-ion athile ensimbi.
– Ukuna: ukuna kwezinsimbi njengama-hydroxide, ama-sulfide, noma usawoti othile.
c. Ukuwina ngogesi kanye nokuhlanza ngogesi
– Ukunqoba ngogesi (EW) kususa insimbi esixazululweni esiku-cathode ngogesi, okukhiqiza insimbi emsulwa kakhulu (isb., ithusi le-cathode).
– Ukuhlanza ngogesi kucwengisisa izinsimbi ezingavuthiwe zibe amazinga ahlanzekile kakhulu, avame kakhulu ethusi, i-nickel, kanye nezinsimbi eziyigugu.
I-hydrometallurgy ivame ukukhetha kakhulu futhi ingaba nobungane kakhulu nemvelo uma iphathwa kahle, kodwa idinga ukuphathwa okuqinile kwezixazululo, ama-reagent, kanye namanzi angcolile angaba khona.
I-Penutup
Izimiso nezindlela zokucubungula i-ore yensimbi konke kuvela emgomweni ofanayo: ukwandisa inani le-ore ngokuhlukaniswa okusebenzayo kwamaminerali abalulekile kanye nokukhishwa kwensimbi. Izinyathelo zokuzuza ezifana nokuguqulwa, ukuhlukaniswa kwamandla adonsela phansi, ukuhlukaniswa kwamagnetic, kanye nokuntanta kudlala indima ebalulekile ekukhiqizeni ama-concentrates ebanga elamukelekayo. Ngaphezu kwalokho, i-pyrometallurgy kanye ne-hydrometallurgy yizindlela eziyinhloko zokukhipha nokucwenga izinsimbi, kuye ngezici ze-ore, isikali sokukhiqiza, kanye nezindleko kanye nokucatshangelwa kwemvelo.
Emikhubeni yesimanje, ukucubungula insimbi okuphumelelayo kunqunywa yinhlanganisela ye-mineralogy, ubunjiniyela bezinqubo, ukulawulwa kwekhwalithi, kanye nomthwalo wemfanelo wezemvelo. Ngokusungula izinto ezintsha kwezobuchwepheshe—njengezinzwa zokuhlunga, amasekethe okugaya alungiselelwe kahle, ukuntanta okusebenzayo kakhulu, kanye nezinqubo zokuhlanza nokuhlanza ezikhethiwe kakhulu—imboni iyaqhubeka nokuqhubekela phambili ekucubunguleni okusebenzisa amandla amaningi, okusebenzisa amanzi kahle, kanye nokusimeme.
