Summary: Ukwenza kanjani ukuthuthukiswa kwensimbi yase-ore kuphendula izinto eziyinqaba zaba insimbi ehlanganisiwe? Le nqophamlando iletha uchungechunge oluphelele lokulungisa izinto zensimbi....
Ukunyuka komhlaba kwe-ore yensimbi (ROM) evela emayini ngokuvamile kuthwala izinga eliphansi futhi kusemince imfucuza eningi nemfucuza enobungozi. Ngakho-ke, kuyadingeka inqubo yokuchuma.
Lesi siqeshana sibonisa ukuthi Ukugeleza okugcwele kokucubungula i-mineral ye-iron ore.
Inqubo yonke yokuphucula ubuchwepheshe be-iron ore ihlanganisa ukusebenza okuhlukahlukene okuphathelene nemisebenzi yomzimba nengqondo, ikakhulu kuhilela izigaba ezilandelayo: ukugqobhoza nokuhlukahluka, ukugaya nokuhlukanisa, ukuhlukanisa, ukoma kwe-concentrate, kanye nokwelashwa kwezilonda.
Isinyathelo 1: Ukubhidliza Nokuhlunga
Amatshe amakhulu athathwa kumayini azalwa abe yizicucu ezinkulu – zifinyelela ku-over mita eyodwa ububanzi obukhulu – okwenza kube nzima ukuyidla ngokuqondile emayini wokugcoba. Kumele idlule kuqala ekuqhekekeni ngezinyathelo eziningi, ukuze inciphise ubukhulu bemolekyuli kancane kancane, ukuzilungiselela imisebenzi yezobunjiniyela bokuhlikihla nokuhlukanisa okulandelayo.
Ukuqhekeka okukhulu Jaw crushers or gyratory crushers are utilized to break down the iron ore to below 200–300 mm. Relying on high compressive and impact forces, they accomplish the initial size reduction of the ore.
Ukuqiqa okukhulu nokuncane: Given the high hardness of iron ore, cone crushers are used in the secondary and tertiary crushing stages to reduce the particle size to below 10–25 mm. Adopting laminated crushing principle, cone crushers feature high crushing efficiency and produce uniform product particle size distribution.
Screening: Ngemuva kokuphahlazeka, izinto zihlolwa; amaqoqo afanele usayizi ahamba esiQophelweni esilandelayo sokucutshungulwa, kuyilapho amaqoqo amakhulu kakhulu ebuyiselwa kwi-crusher ukuze aphinde acutshungulwe, kwakha uhlelo lokuvala. Le nkqubo yokuvala iyasebenza kahle ekulawuleni usayizi weqanda lomkhiqizo futhi ivimbe ukuqhekeka kakhulu, kuyilapho igcizelela ukusebenza okuphelele kokucindezeleka.
Isinyathelo 2: Ukugaya Nokuhlukanisa
Le yizinga elibalulekile ekukhululeni izimayini zamaminerali ohlelweni lokuphucula ithusi. Ngemva kokugaya, izingxenye zamaminerali ngaphakathi tauyizi ithusi zihlala zihlala ziqinile ngokuhlangene namaqembu we-gangue ngaphakathi kwezimayini. Ukuze kufinyelelwe ukwehlukana okusebenzayo, ithusi kumele lifywe ukuze kutholakale izinga elanele lokukhululwa kwe-monoma.
2.1 Ukubhola
Ukwenza imihlaba eluhlaza is typically conducted in ball mills or semi-autogenous grinding (SAG) mills. The ore usually needs to be ground down to a particle size suitable for mineral liberation (typically 70%–95% passing -200 mesh), laying the necessary foundation for high-efficiency separation.
Ukwenza imihlaba eluhlaza is the most energy-intensive stage in the iron ore beneficiation plant, accounting for about 40–60% of the plant’s total energy consumption.
2.2 Ukuhlukanisa
Ukukhishwa kwegeji kusuka emgomeni wokuchoboza kungena kumishini yokuhlukanisa—okuvame kakhulu ama-hydrocyclones—okuhlukanisa into ibe yimikhiqizo evumelekile neyangaphandle ngokususelwa ekusheshiseni kwezinhlayiya ekuzuleni kwamanzi. Isigaba esincane esihambisana nemikhawulo (overflow) siya esigabeni sokuhlukanisa, kanti isigaba esikhulu esingahambisani (underflow) superficies endaweni yokuphinda uchoboze, senza umjikelezo ovalekile. Ukusebenza kahle kokuhlukanisa kuthinta ngqo izinga lokuchoboza ngokweqile kanye nokukhululwa kwezinto eziphumayo emkhubeni ohleliwe, edlala indima ebalulekile ekusebenzeni kokuhlukanisa okulandelayo.
Isinyathelo 3: Ukuhlukanisa
Lona yiwona wombhalo oyinhloko wenqubo yokuthuthukisa i-ore yensimbi, lapho izici zensimbi zihlukaniswa nezici zomthofu ngokusekelwe ekuhlukaniseni kwezakhi zofuzo zomzimba noma ezekhemikhali. Ukukhetha indlela efanele yokuhlukanisa ngokuya kakhulu ngezici zenkuni, ikakhulukazi uhlobo lwezinto zensimbi, usayizi weqanda lokusabalalisa, nobudlelwano bokuhlangana.
Izigaba ezilandelayo zichaza izindlela zokuhlukanisa zamahlobo amane ajwayelekile evaseli lensimbi: i-magnetite, i-hematite, i-limonite, ne-siderite.
| Uhlobo Lwe-ore Yensimbi | Umkhiqizo we-oyela ofezekile |
|---|---|
| I-Magnetite (Fe₃O₄) | ~72% |
| I-Coal (Fe₂O₃) | ~69.94% |
| Limonite（FeO(OH)·nH₂O） | 40%–60% |
| Siderite (FeCO₃) | ~48.2% |
3.1 I-Magnetite - Ukwahlukaniswa Ngamagneti
Ngenxa yokuba i-magnetite inamandla okuba nomqhubi wombane, ukuhlukaniswa komphakathi wobumelusi kuyindlela engcono kakhulu futhi eshibhile yokuyihlambulula.
Le nqubo ilungele kakhulu amathambo alula, alula ukuwawina ngokulawulwa njengezinto ezilula ze-magnetite.
Continuous Ukwenza imihlaba eluhlaza – LIMS: Kuncike kakhulu ekunqenqeni kwesikhunta se-magnetite, le nqubo isebenzisa izigaba ezilodwa noma ezimbili zokugqabhuka okuqhubekayo. Uma i-slurry eseqedile ukugqama okufanele, iya ngokushesha ku-LIMS.
Stage Ukwenza imihlaba eluhlaza – LIMS: Ilungele imayini yezinto ezincane, ezisezingeni eliphansi le-magnetite. Ukugqoka okuphambili kulandelwa ukuhlukaniswa kwemagnethi okukhulu ukulahla ingxenye enkulu yamanzi awalelwe ekuqaleni. Ukugxila okutholakele ngokuhlabahlaba kwezixazululo ezinkulu kungabekwa ekugcineni ukuze kugaywe okwesibili ngaphambi kokuqamba.
Inzuzo enkulu yeSolwazi ye-SBM: Inhloso ephambili kuzo zonke izingxenye ezintathu zokuhamba komsebenzi ukukhishwa kwezinsalela ngokushesha, okunciphisa ubukhulu bokusebenza obusele, kunciphisa ukusetshenziswa kwamandla jikelele, futhi kwehlisa izindleko zokusebenza.
3.2 Ukuhlukaniswa kweHematite
I-I-Coal (Fe2O3) iqukethe kuze kube yi-69.94% insimbi futhi ihlukaniswa njengomhlaba okuphansi kwe-magnetic. Okwamanje, indlela ejwayelekile yokuhlukanisa i-hematite ihlanganisa ukuhlukaniswa komgogogu, ukushaywa ngamandla, nokuhlukaniswa okuhlanganisiwe.
Ukuhlukaniswa kwedons'ku
Ngokwezakhiwo zobukhulu bezinhlayiyana, ukuhlukaniswa kwe-hematite ngokuyingxenye kobunzima kuhlukaniswa kube ukuhlukaniswa kwezindlu ezincane nokukhulu:
Ukuhlukaniswa kwe-Gravity OKuncane Ngokuningiliziwe Ilungele amagogu e-hematite anezinga elincane lokusakazeka nokubeka phezulu kwe-magnetic susceptibility. Igudu lihlakazwa futhi lishaywa ukuze kukhishwe amakhemikhali eminingi e-hematite ngaphambi kokuhlukanisa ukumila okuphezulu kwe-hematite kusetshenziswa imishini yokwahlukanisa ngesigqi (isb., amatafula okusikeka, amathawula ayindilinga).
Ukuhlukaniswa Kwentuthu Kwebanga Elikhulu Sono Sesikhungo Sokudonswa Komthwalo Ifanele amathebula akhwalithi enkulu e-hematite. Le ndlela ivamise ukusebenza kuphela ngenqubo yokuwubhubhuza ngokusebenzisa imishini yokuhlukanisa ngokuhamba ngokudonswa kwezinsimbi ezinkulu (isb., ama-jiggers) ukuze kuhanjiswe izinsalela ezinkulu ngokushesha.
b) Ukuqhuma emazingeni omhlaba
Isetshenziselwa ukwelapha amathoyizi e-hematite anwebekayo, aphakathi kwesikhathi esincane kuya kwengaphansi kokuba namandla okungena, ukufutha kufaka phakathi izindlela ezimbili eziyinhloko: ukufutha okuqondile nokufutha okuphambene. Ukufutha okuqondile kungcono kakhulu kuma-ores aheha i-hematite elula eyodwa, kuyilapho ukufutha okuphambene kusetshenziswa kabanzi kuma-ores e-hematite aphezulu anezinsimbi ezihlukahlukene ezilula ukuzishaywa phezulu.
c) Ukuhlukaniswa Okuhlanganisiwe
Ukuhlukaniswa okuhlanganisiwe kwenzelwe amaminerali we-hematite ayinkimbinkimbi ahlotshaniswa namaminerali alula angaba namandla okusebenza magnetic kakhulu noma izinto ezingezona izinsimbi. Izindlela ezivamile zifaka:
- LIMS - Ukuhlukaniswa Kwamagneti Okuphakeme (HIMS)
- HIMS - Ukuphaphalaza
- HIMS - Ukuhlukanisa nge-Gravity
- Ukubhola Okukhipha Ugesi - Ukuhlukanisa Ngomshini Wezimfanelo Zezikhungo Zomtshelwa
3.3 Ukuhlukanisa iLimonite
ILimonithi ikhuluma ngokuyinhloko nge-oxides kashukela obhodlingo wemfihlo we-iron (Fe) phakathi kuka-40% no-60%, okubeka ukuthi kuyidini le-iron elingekho namandla okumelene nokuma kukagesi. Izindlela ezivame ukwahlukanisa i-limonithi zifaka phakathi ukuhlukaniswa ngesisindo, ukuhlukaniswa ngemagneti, ukuphahlukana kwe-flotation, nokuhlanganisa kwezinhlobo zokwahlukanisa.
Ukuhlukaniswa kwedons'ku
Ifanele kakhulu ezinsalela zamaminerali asekhanda elikhulu le-limonite ebanzi. Inqubo yokuhlanza kanye nokuhlukanisa ngokwezwekusho isetshenziswa kabanzi, ethatha umshini wokuwasha odala i-drum wokuwasha uwasha i-ore eluhlaza ukuze ususe ukhukhhwane, kulandelwa imishini yokuhlukanisa ngokwezwekusho njengabahlukanisi abaphakathi nesisindo esikhulu (HMS) noma ama-jigs.
b) Ukwahlulwa Okungenamandla
Naphezu kokuba i-limonite ayinaso isibhamu esinamandla, i-High-Intensity Ukwahlukanisa ngamagnetic (HIMS) isengasetshenziswa kahle ukucubungula amalahle acwebezelayo ano-ore adilizayo.
ukufipazwa
Kusetshenziswe kumafutha e-limonite alincane kakhulu, ahlanganisa izindlela zokuphonsa ngamzila oqondile nezigaba zokuphonsa ngokuphambene. Ukususa izinhlayiya ezincane kakhulu noma ukukhuphula ukuminyana kwezinhlawulo kuvamise ukudingeka ngaphambi kokuphonsa ukuze kususwe imiphumela engemihle yezilawuli zimanzi ezincane.
Ukuhlukaniswa Okuhlanganisiwe
Kwenziwe ngokweqile kumarhini we-limonite ayinkimbinkimbi anezinhlayiyana ezihlala zingalingani noma okuqukethwe kwe-keri ephezulu. Izinhlelo ezivamile zihlanganisa:
- Ukwahlukana kwe-Gravity - Ukuhlukaniswa Ngobukhali Bufakazi Bokumelana BibaMagnetic (HIMS)
- Ukufuna Okukhethakalayo - Ukukhipha Kwamanzi Ngephuzu
- Ukubhujiswa kwe-Flocculation - Ukwahlukaniswa Ngokubalulekile Kwamandla Okudonsela (HIMS)
3.4 Ukwahlula iSiderite
I-Siderite (FeCO3) ikakhulukazi ihlanganisa i-carbonate yensimbi, enenani lenhlanganiso yensimbi engu-48.2%. Inqubo ezine ezivamile zokuhlunga zisohlwini ngezansi:
Ukuhlukaniswa kwedons'ku
Ifanele izilimo ezihlukanisiwe zomgodi omkhulu nengaphakathi we-siderite okhanyayo. Ukuhlukanisa Okukhulu Okunzima (HMS) kanye nama-jiggers asetshenziswa njalo ukuze kuzuze ukuhleleka okusebenzayo.
ukwahlukanisa Kwamandla Aphezulu Kwa-Magnetic (HIMS)
Kuhambisana namalahle e-siderite anobuthakathaka obungamandla kazibuthe. Ukusebenzisa izihlungi zikazibuthe eziphakeme ezinamanzi (WHIMS) ukuze kuphathwe i-ore slurry ekhokhelwe ngokuhlanza kwamanzi kuthuthukisa kakhulu izinga le-concentrate kanye nenani lokubuyiselwa.
ukufipazwa
Ilungele ukucubungula imayini ye-siderite enobungako obuncane, okubandakanya nokungena kwangakwesokudla nokungena kwe-reverse flotation:
Ukuveliswa okuqondile Kuqukethe izindlela zokuphuphuzwa kwe-asidi ne-alkaline.
Ukugeleza okuphindaphindiwe kwe-Flotation Iyona eqhele ekutholeni amaconsi anionic, i-reverse flotation kanye ne-cationic collector reverse flotation technologies.
d) Ukugcoba Ngokugcoba - Ukuhlukaniswa Ngokufana Kwamandla Okuncane (LIMS)
Amukela ukoshi olushisa oludonsayo ukuguqula i-siderite engaba namandla okubamba umphumela wezomfanekiso ozinzile ube yaimu enamandla okubamba (njenge-magnetite), kulandelwa i-LIMS ukuze kuhlukaniswe kahle ngokuphumelelayo.
| Uhlobo Lwe-ore Yensimbi | Ukumagnetismu | Icedlwana Eliyinhloko Lokuhlukanisa |
|---|---|---|
| I-Magnetite | Qinile | Umahlukanisi wemagnethi |
| I-Coal | Buthaka | Ithebula lokududula, ithayi yespiral, i-jig, isigubhu sokufukuza, umxhumanisi wombhoshongo, insiza yokubonsa uwoyela |
| Limonite | Buthaka | Isihlungi esikhulu sobusuku, i-jig, isihlungi sombango wesimo somhlaba, iseli sokuncibilika |
| Siderite | Buthaka | Umehluko omkhulu phakathi, i-jig, umehluko wombhobho we-magnetic, iseli yokubuyisa, ubhavu bokuthambisa |
Isinyathelo 4: Ukuqoqwa Kogodo nokwelashwa kwe-tailings
Ukuhlwithwa Koketshezi Okugxilile
Ukugxila kwetsheme okutholakala emva kwesigaba sokuhlukanisa kuwuhlaba olukhulu lwamanzi (okuvamile olunobungako obungu-20% kuya ku-30% bezinto eziqinile). Kudinga ukuthi ludilizwe amanzi ukuze kube kuhlangabezana nezidingo zokuhamba nokubunjwa okuqhubekayo.
Ukugcwala (Ukuqina)
The slurry is first fed into a thickener, where gravity settling causes solid particles to migrate downward while clear water overflows from the top. This stage increases the slurry density (solids concentration) to 40%–60%.
Ukucindezela Ngokuhlunga
Isihlungu esakazekayo sikhishwa endaweni engenamanzi (njengomshini wokucindezela ngempushana noma umshini wokucindezela wephampu lezithombe). Ngaphansi kwengcindezi yomshini noma we-vacuum, amanzi asuswa ngokwengeziwe ukuze kutholakale iphansi lefilithi eliqukethe emanzini cishe angu-10%. Le phansi ibenza umkhiqizo wokugcwalisa sengathi i-iron concentrate yokugcina, ilungele ukupakishwa nokuthunyelwa.
4.2 Ukwelashwa Kwezinsalela
Izinto zokuphotha (i-tailings) ezenziwe ngesikhathi senqubo yokuthuthukisa insimbi ivame ukuba ngaphezu kwe-50% yenqwaba yegolide eliqediwe. Ukuphathwa kwe-tailings kuyindawo ebalulekile yenqubo yokuthuthukisa. Njengamanje, izindlela ezintathu eziyinhloko zisetshenziswa ukwelapha i-tailings yesimbi:
Ukulahla Okwegundane Okuvumayo
Le ndlela yemvelo kakhulu, lapho i-tailings slurry ikhutshwa ngqo emgodini we-tailings wokugcina amanzi ukuze igcinwe ngamanzi. Inqubo ilula futhi idinga utshalomali oluphansi lwezimali, ngakho yamukelwa kabanzi ezitsheni zokuqala zokugeleza. Nokho, ihilela izingozi ezinkulu zokuphepha futhi iyasuswa kancane kancane.
Ukugaya Izinsalela Zomile
Ukwelashwa okomile futhi kuwumkhuba ojwayelekile futhi kuwukujwayelekile kumashini amasha wokuhlanzwa kwe-ore yensimbi. Inqubo ivamise ukuhlangabezana nokugawulwa okujulile kwe-cone okuqinile kulandelwa ukuhlunga nokomisa amanzi, kunciphisa umswakama wezinsalela ngaphansi kwe-15% ukuze kubekwe ngokomile. Uma iqhathaniswa nokulahla amanzi anezindawo ezomile, ukubekwa ngokomile kunikeza ukuphepha okuthuthukisiwe kakhulu, kuyilapho kufinyelelwa ezingeni eliphezulu lokuthi amanzi abuyiselwe emsebenzini futhi kugcinwa amanzi ngendlela ephakeme.
c) Ukusetshenziswa Okugcwele KweTailings
Ama-tailings anga kusetshiselwa ekukhiqizeni izinsiza zokwakha, ukugcwalisa izikhala ezikhishwe ngemayini, kanye nokuthuthukisa umhlabathi. Le ndlela isebenza ukuphendula ngesisekelo inkinga yokugcina ama-tailings njengoba futhi idala inani lomnotho ongaba khona.
Ukuhlanzwa kweziqhamo zensimbi kuwumgudu obalulekile oxhumanisa izinsiza zamaminerali nombandela wensimbi. Inqubo enobuchwepheshe obuqondile futhi enengqondo, kanye nokukhethwa kwemishini efanele, kuyisikhathi esiyisisekelo sokuqinisekisa ukufinyelela kwamandla okuyinqwaba, ukuhlangabezana nezindinganiso zekhwalithi, nokugcina ukusebenza okuqhubekayo okuzinzile.
Before finalizing the beneficiation process flow, detailed process mineralogy studies must be conducted to determine the ore’s chemical composition, mineralogical composition, liberation characteristics, and particle size distribution, among other key parameters.
Ukufunda kabanzi mayelana nenqubo yokuthuthukisa uphondo lwensimbi kanye nezixazululo zokukhetha imishini ngokwezifiso, khululekile ukuxhumana ne-SBM ukuze uthole iseluleko ngokwezifiso nokwesekwa kwezobunjiniyela.
Thola Isisombululo
Thumela Umyalezo