Izidingo Zamandla Enqubweni Yokucubungula Amaminerali
Ukucubungula amaminerali kuwuchungechunge lwezinqubo ezisetshenziselwa ukuhlukanisa amaminerali abalulekile nokungcola (i-gangue), ukwandisa izinga lawo, nokukhiqiza imikhiqizo ehlangabezana nezimfuneko zezimboni. Ngemuva kwalezi zinhloso, isici esisodwa esinqumayo sivame ukunakwa: amandla. Izidingo zamandla ekucubungulweni kwamaminerali azithinti nje kuphela izindleko zokusebenza kodwa futhi zithinta umthelela wekhabhoni, ukwakheka kwezitshalo, ukuthembeka kokukhiqiza, kanye nokusimama kwezimayini. Lesi sihloko sixoxa ngokuthi amandla asetshenziswa kuphi, izici ezithinta izidingo zawo, kanye namasu okuthuthukisa ukusebenza kahle kwamandla.
1. Kungani amandla eyinkinga enkulu ekucutshungulweni kwezimbiwa?
Iningi lemisebenzi yokucubungula amaminerali ibhekana nezinto eziningi, ngokuvamile ezinamazinga aphansi amaminerali ayigugu. Lokhu kusho ukuthi inani elikhulu lamatshe kumele lichotshozwe, ligaywe, lipompe, lixutshwe, futhi lihlukaniswe ukuze kutholakale inani elincane lokugxila. Isinyathelo ngasinye sidinga amandla omshini, kagesi, okushisa, kanye namakhemikhali. Ezitshalweni eziningi, izindleko zamandla zingaba yinye yezingxenye ezinkulu zezindleko zokusebenza, zidlule ngisho nezindleko zamakhemikhali noma zabasebenzi, ikakhulukazi lapho amanani kagesi kanye nophethiloli enyuka.
Ngokombono wezemvelo, amandla avela ezitshalweni zamandla ezisekelwe ezintweni zasendulo azokwandisa ukukhishwa kwegesi ebamba ukushisa. Ngakho-ke, amandla awagcini nje ngokuthi "mangaki ama-kilowatt-hours asetshenzisiwe," kodwa futhi amayelana namasu okususa i-carbonization embonini yezimayini.
2. Amafomu kanye nemithombo yamandla ekucutshungulweni kwamaminerali
Amandla ekucutshungulweni kwamaminerali angahlukaniswa ngezinhlobo eziningana eziyinhloko:
1. Amandla kagesi: asetshenziselwa ama-crusher motors, imishini yokugaya, ama-conveyor, amaphampu e-slurry, ama-flotation agitators, ama-air compressor, kanye nezinsimbi zokulawula.
2. Amandla emishini: empeleni avela kugesi/idizili eguqulwa ibe umsebenzi wemishini, isibonelo ukunciphisa usayizi.
3. Amandla okushisa (ukushisa): asetshenziselwa ukomisa, ukugaya, izixazululo zokushisa, noma izinqubo ezidinga izinga lokushisa elithile.
4. Amandla amakhemikhali: avela kuphethiloli (idizili, igesi, amalahle) kanye nakuma-reagent athile ezinqubweni ze-hydrometallurgical.
Imithombo yamandla evamile ihlanganisa igridi kagesi ye-PLN, amajeneretha kadizili, igesi yemvelo, amalahle, kanye namandla avuselelekayo ayanda njengokubuyiselwa kokushisa kwelanga, komoya, noma okulahlwayo ezindaweni ezithile.
3. Izigaba zenqubo kanye namaphuzu okusetshenziswa kwamandla okukhulu kakhulu
a. Ukuhlanganyela: ukuchoboza nokugaya
Ukuqala—ukunciphisa usayizi we-ore—ngokuvamile kuyithuluzi lamandla elikhulu kakhulu ezitshalweni eziningi zokucubungula amaminerali. Ukuchoboza kuvame ukuphula amatshe amakhulu emayini abe usayizi ongaphathwa yi-mill. Ukugaya bese kucwengisisa izinto kuze kube yilapho amaminerali abalulekile ekhululwa ku-gangue.
Kungani amandla ancishisiwe? Ngoba ukuphula idwala kudinga umsebenzi omningi, futhi akuwona wonke amandla aguqulwa abe "amandla okwakheka kwe-fracture"; okuningi kulahleka njengokushisa, umsindo, kanye nokudlidliza. Ukukhetha uhlobo lwe-crusher (umhlathi, i-gyratory, i-cone) kanye ne-mill (SAG, i-ball mill, i-HPGR) kuzonquma kakhulu ukusebenza kahle.
b. Ukuhlukaniswa kanye nokuthuthwa kwe-slurry
Ngemva kokugaya, izinto ezisetshenziswayo zivame ukuhlanganiswa namanzi ukuze zenze udaka bese zihlukaniswa kusetshenziswa i-hydrocyclone noma isikrini. Lesi sigaba sidinga amandla ukuze:
– iphampu yodaka olunomthamo omkhulu,
- uhlelo lokulawula ukuminyana,
- sebenza ukujikeleza kwamanzi.
Nakuba amandla ngeyunithi ngayinye angase abe ngaphansi kokugaya, isidingo samandla esiphelele singaba sikhulu ngenxa yokusebenza okuqhubekayo kanye namazinga aphezulu okugeleza ahilelekile.
c. Ukugxila: ukuntanta, amandla adonsela phansi, amandla kazibuthe
Izindlela zokuhlukanisa amaminerali (ukuhlushwa) zinephrofayili yamandla ehlukene:
– Ukuntanta kudinga amandla okukhuthaza, ukuphefumula (i-blower/compressor), kanye namaphampu okujikeleza kwegazi. Ukusetshenziswa kwamandla nakho kuthinteka yizimo ze-pH, ukusetshenziswa kwe-reagent, kanye nesikhathi sokuhlala.
– Ukuhlukaniswa kwamandla adonsela phansi (okuzungezayo, itafula elinyakazisayo, i-jig) kuvame ukonga amandla kakhudlwana, kodwa kuncike kusayizi kanye nomehluko wobuningi.
– Ukuhlukaniswa kwamagnetic kudinga amandla ukuze kukhiqizwe insimu yamagnetic (ikakhulukazi kuma-separators anamandla aphezulu).
d. Ukususa amanzi: ukuqina, ukuhlunga, ukomisa
Ukunciphisa okuqukethwe kwamanzi ekugxileni kanye nasemisileni kudinga amandla ngendlela elandelayo:
– amandla okupompa nokuxuba ku-thickener,
– amandla okuhlanza noma ingcindezi kumshini wokuhlunga,
– amandla okushisa okomisa (uma kudingeka).
Ukususa amanzi kuba yinto ebaluleke kakhulu ngenxa yezidingo zokuphathwa kwamanzi nezinsalela okuqinile, isibonelo ukusetshenziswa kwezinsalela ezomile ezidinga ukuhluzwa okujulile.
e. I-Hydrometallurgy kanye ne-pyrometallurgy (uma ihlanganisiwe)
Kwezinye izimpahla, ukucutshungulwa kwamaminerali kuhlotshaniswa nokukhishwa kwensimbi:
– I-Hydrometallurgy (ukuleaching, ukukhipha i-solvent, ukuthola i-electrowinning) idinga amandla okushisa isixazululo, ukushukuma, ukungenisa umoya/i-oxidation, kanye nogesi omningi wokuthola i-electrowinning.
– I-pyrometallurgy (ukuncibilikisa, ukuthosa) inamandla amaningi okushisa, ngokuvamile isekelwe kuphethiloli noma kugesi (isithando sikagesi).
Uma indawo yokucubungula amaminerali isesichungechungeni esifanayo ne-smelter, isidingo samandla esiphelele sizokhula kakhulu futhi sidinga ukuhlelwa kokuhlinzekwa kwamandla okuyinkimbinkimbi kakhulu.
4. Izici ezithinta izidingo zamandla
Izidingo zamandla azikashintshi kuzo zonke izimboni. Ezinye izici ezibalulekile yilezi:
1. Izici ze-Ore
Ukuqina, ukuklwebheka, okuqukethwe amaminerali, ukuthungwa, kanye nosayizi wezinhlamvu kunquma ukuthi kunzima kangakanani ukuchoboza nokukhulula insimbi. Ama-ore aqinile azodinga amandla okugaya aphezulu.
2. Usayizi oqondiwe (usayizi womkhiqizo) kanye nezinga lokukhululwa
Uma usayizi wetshe eliqondiwe uncane, kulapho amandla okugaya ephakama khona. Izigayo ezifuna indawo ephezulu yokuntanta okuyinkimbinkimbi zivame ukubhekana nokushintshana phakathi kokubuyisa kanye nezindleko zamandla.
3. Isilinganiso sokuphakelayo kanye nesilinganiso sokucebisa
I-ore yezinga eliphansi iphoqa izigayo ukuthi zicubungule ama-tonnages amakhulu ukuze zikhiqize inani elifanayo lomkhiqizo—ukusetshenziswa kwamandla okuphelele kuyanda.
4. Ukusebenza kahle kwemishini kanye nesu lokusebenza
Isimo se-mill liner, ukwakheka kwesekethe, ukulawulwa kobuningi be-slurry, kanye nokugcinwa kwe-motor/pump kuthinta ukusebenza kahle kwamandla.
5. Ukutholakala kwamanzi kanye nomklamo wokujikeleza kwamanzi
Amanzi alinganiselwe angandisa izidingo zamandla zokupompa okuyinkimbinkimbi, ukwelashwa kwamanzi, noma ukujikeleza kwamanzi kabusha.
5. Amasu okwandisa ukusebenza kahle kwamandla
Ukusebenza kahle kwamandla kuvame ukutholakala ngokuhlanganiswa kokuthuthukiswa kobuchwepheshe, ukwenza ngcono ukusebenza, kanye nokuphathwa kwamandla.
1. Ukuthuthukisa ama-comminute
– Ukusebenzisa ama-HPGR (High Pressure Grinding Rolls) kumasekethe athile kunganciphisa ukusetshenziswa kwamandla uma kuqhathaniswa nokugaya okuvamile.
– Ukugxila ngaphambi kwesikhathi (isib. ukuhlunga okusekelwe ku-sensor) kungasusa i-gangue kusenesikhathi ukuze kuncishiswe i-tonnage eya esigayweni.
– Usayizi ofanele wokuphakelayo kanye nezilungiselelo zesekethe zokuhlela ukuze kuncishiswe ukugaywa ngokweqile.
2. Ukulawulwa kwenqubo okuqhutshwa idatha
Izinhlelo zokulawula izinqubo ezithuthukisiwe zingakwazi ukuzinzisa ukusebenza kwemishini yokugaya kanye nokuntanta: ukugcina ubuningi, usayizi wezinhlayiya, ukugeleza komoya, kanye nomthamo we-reagent ukuze kuncishiswe ukusetshenziswa kwamandla.
3. Ukulungiswa nokugcinwa kwemishini
– Kusetshenziswa ama-motor asebenza kahle kakhulu, ama-variable speed drive (VSD) kumaphampu nakumafeni.
- Uhlelo lokulungisa ukuvimbela ukwehla kokusebenza kahle ngenxa yokuguga.
4. Ukuphathwa kwamanzi kanye nokujikeleziswa kwawo
Ukunciphisa ukulahleka kwamanzi kunciphisa izidingo zokupompa. Ama-thickener asebenza kahle asiza ekuvuseleleni amanzi futhi anciphise izindleko zamandla ohlelweni lokwelapha amanzi.
5. Ukuhlanganiswa kwamandla avuselelekayo kanye nokubuyiselwa kwamandla
Ukusetshenziswa kwe-PLTS/PLTB emithwalweni ethile, kanye nokusetshenziswa kokushisa okulahliwe (uma kukhona iyunithi yokushisa) kunganciphisa ukuncika emandleni akudala.
6. Umthelela wezomnotho kanye nokusimama
Ukonga amandla ngokuvamile kunomthelela oqondile wezezimali ngokunciphisa izindleko ngethani ngalinye le-ore ecutshungulwayo. Ngaphezu kwalokho, ukusebenza kahle kwamandla kwandisa ukuqina kokusebenza ekushintsheni kwamanani kagesi/kaphethiloli. Ngokombono wokuzinza, ukunciphisa ukusetshenziswa kwamandla—noma ukushintshela emithonjeni ephansi yekhabhoni—kusiza izinkampani ukuhlangabezana nemigomo yokunciphisa ukukhishwa kwegesi, ukwandisa ilayisense yazo yomphakathi, kanye nokuhambisana nezindinganiso ze-ESG.
Isiphetho
Izidingo zamandla ekucubungulweni kwamaminerali ziyisici esibalulekile esithinta izindleko, ukusebenza kokukhiqiza, kanye nomthelela wemvelo. Isigaba sokuguqulwa kwamandla sivame ukuba ngumthengi omkhulu wamandla, kulandelwe ukuthuthwa kwe-slurry, ukuhlushwa, kanye nokususwa kwamanzi. Ububanzi bezidingo zamandla buthonywa kakhulu yizici ze-ore, usayizi womkhiqizo oqondiwe, ukusebenza kahle kwemishini, kanye namasu okusebenza. Ngokwenziwa ngcono kokuguqulwa kwamandla, ukulawulwa kwenqubo okuzwakalayo, ukulungiswa kwemishini, ukuphathwa kwamanzi, kanye nokuhlanganiswa kwamandla avuselelekayo, imboni yokucubungula amaminerali inganciphisa ukusetshenziswa kwamandla ngaphandle kokulahlekelwa ukubuyiselwa kwamaminerali okubalulekile. Ekugcineni, ukuphathwa kwamandla okuhlakaniphile akuzuzisi nje kuphela ngokwezomnotho kodwa futhi kuyisisekelo esibalulekile sokucubungula amaminerali okusimeme.
Uma ufisa, ngingaguqula lesi sihloko sibe sezobuchwepheshe kakhulu (isib., ukungeza izibonelo zokubala kwe-kWh/ton, ama-Bond indices, noma izifundo zezimpahla ezithile njenge-nickel, igolide, noma ithusi).
