Ukwelashwa Kwe-Chromite Ore

Summary: Ukuphepha kweChromite kuhilela izigaba eziningi, ngokuvamile zifaka ukuchoboza, ukugqagina, ukuhlukanisa, ukugxila, nokulungisa amanzi.

Ukwelashwa kwe-ore ye-chromite kuyinto ebaluleke kakhulu ekukhiqizeni i-chromium, esetshenziswa kabanzi ezimbonini eziningi ezifana nokukhiqizwa kwesitina esinsimbi engenasici, ukukhiqizwa kwamakhemikhali, nokusetshenziswa kwezinsimbi ezingangeni umlilo. Inqubo yokuhlukanisa i-chromite ore ihlose ukwahlukanisa izimayini ze-chromite ezibalulekile ukusuka kwizinto ezihlangene negangue, kuthuthukise iqukathi le-chromium futhi kwenze kube ilungele ukucutshungulwa okwengeziwe. Le ndatshana izohlaziya ngokugcwele inqubo yokuhlukanisa i-ore ye-chromite ngokusekelwe kukhodi lwamaflo, ifaka zonke izigaba kusukela ekuphathweni kwe-ore entsha kuya ekukhiqizweni kwe-chromite concentrate.

Izinhloso Zokuthuthukiswa KweChromite

Izinsiza ze-chromite zehluka kakhulu ngobunjalo, umphumela, kanye nosayizi wombimbi ngokuya ngendawo yazo ye-geological. Ngokuvamile, i-chromite itholakala ezindongeni ze-ultramafic ne-mafic, ivamise ukuba ne-serpentine, i-olivine, i-magnetite, kanye nezinsalela ze-silicate.

Imigomo eyinhloko yokuthuthukiswa kwe-chromite ibandakanya:

• Ukukhuphula okuqukethwe kwe-Cr₂O₃ ukuhlangabezana nezincazelo zemakethe (ivamise >40% ye-metallurgical grade).
• Ukukhipha iziphazamisi ezinjenge-silica, i-alumina, i-magnesium oxide, kanye ne-iron oxides.
• Thola ukusabalalisa usayizi wezinto ophakeme ukuze uqhuthe imikhiqizo ye-downstream.
• Khulisa ukul recover chromite minerals.

I-Ukwelashwa Kwe-Chromite Ore Flow

Ukuthuthukiswa kwe-chromite kuhilela izigaba eziningi, ngokuvamile kufaka phakathi Ukucrusher, Ukugaya, Ukuhlukanisa, Ukuhlanganisa, nokukhipha amanzi. Ukukhethwa kwamasu kuncike ezakhiweni ze-ore kanye nezincazelo zomkhiqizo ezifisiwe.

1. Ukuphathwa Kwe-Raw Ore

Inqubo yokuhlunga igolide le-chromite iqala ngokusebenzisa igolide elihleliwe. Igolide elihlelekile, okumelwe lichwephwe emigodini evulekile noma emigodini engenhla, liyanikezwa kuqala kumthungi wokudla. Umsebenzi womthungi wokudla ukulawula ukuhamba komsebenzi ophuma kuzo, ukuqinisekisa ukunikezwa okuhlala njalo nokulawulwa kwenqubo yokubhidliza elandelayo. Lesi yisinyathelo sokuqala esiyisisekelo njengalokho kusetha isisekelo senqubo yonke yokuhlunga, kuvimbela ukudlula noma ukunganeleka kokuhlinzeka kwemishini yokubhidliza.

2. Isigaba Sokucwiliswa

2.1 Ukucwiliswa Okokuqala

The raw ore from the feeder is then directed to a PE jaw crusher for primary crushing. The PE jaw crusher is a robust piece of equipment that uses a compressive force to break the large chunks of raw ore into smaller pieces. It has a wide feed opening and can handle relatively large particles. The crushing action in the jaw crusher occurs as the moving jaw compresses the ore against the fixed jaw, reducing its size. The output of the primary crusher is typically in the range of several tens of millimeters in size, which is then ready for further processing in the secondary crushing stage. Okukhishwa okuhamba phambili kuPE jaw crusher ukuya komfutho. I-PE jaw crusher iyinsiza enamandla esebenzisa amandla okucindezela ukuyiphula imithwalo emikhulu ye-ore ibe izingcezu ezincane. Inomkhawulo omkhulu wokudla futhi ingabamba amaphuzu amakhulu. Umsebenzi wokuphula kwi-jaw crusher wenzeka njengoba i-jaw eshukumayo icindezela i-ore ngaphansi kwejawu eqinile, yehlisa usayiziwayo. Umphumela we-crusher wokuqala uvamise ukuba phakathi kwemikhawulo emithathu yama-millimeters, okuba sekulungele ukucutshungulwa okwengeziwe esigabeni sokuphula sesibili.

2.2 Ukuphuka Okwesibili

Ngemuva kokuphuka okuyinhloko, i-ore ifakwa emshinini wokuphuka we-cone ukuze kuphuke okwesele. I-cone crusher iqhubeka nokwehlisa usayizi wezinto ze-ore ngokufaka inhlanganisela yokucindezelwa namandla okugunda. Ine-chamber yokuphuka ye-conical enomphakathi ohambayo kanye ne-concave eqinile. I-ore iphukile njengoba idlula phakathi kwesikhala phakathi komphakathi kanye ne-concave, okuholela ekwakheni ukusatshalaliswa kwemithamo yezinto okunembile. Umkhiqizo ovela kumshini wokuphuka we-cone kufanele uhlolwe usebenzisa isihlungi esivunguzelayo. Isihlungi esivunguzelayo sihlukanisa i-ore ephukile sibe izigaba ezahlukene, lapho izinto ezinkulu kune-20 mm zibuyiselwa kumshini wokuphuka we-cone ukuze ziphuke futhi, futhi izinto ezisemkhakheni ofunwayo (ongaphansi kwe-3 mm kulokhu) zithunyelwa esigabeni esilandelanayo sezinqubo.

3. Ukugaya

Uthuli oluhlolwe olunezinga olungaphansi kuka-3 mm lufakwe emshinini we-ball mill wokugaya. I-ball mill iyinsiza ewumbo yonke egcwele amabholi ensimbi. Njengoba umshini uphinde, amabholi ensimbi ayagaya futhi abhubhise izinhlayiya zothuli, ezithoba zibe yipulver. Inqubo yokugaya ibaluleke kakhulu ekukhululeni izinto eziphathelene ne-chromite ezintweni ezikhaliphile. Izinga lokugaya lilonke lihlolwe ngokucophelela ukuqinisekisa ukuthi izinto ze-chromite zikhululeka ngokuphelele ngaphandle kokugaya kakhulu, okuyoholela ekwandeni kokusetshenziswa kwamandla nasemphumeleni wezinto ezincane eziyinkimbinkimbi ezinzima ukuhlukanisa.

4. Ukuhlukaniswa

Ngemuva kokugaya, i-ore slurry evela ebholiweni imishini ifakwa kwi-spiral classifier. I-spiral classifier isebenzisa umehluko ekushayeleni kwezakhi ezahlukene ezindaweni ezahlukene ukuze ihlukanise. Izinto ezinkulu futhi ezinzima zihlala phansi ngokushesha futhi zithwalwa yi-spiral conveyor engezansi kwe-classifier, kanti izinto ezincane zihlala esiphumeleni se- liquid futhi zikhishwa njengokugqwala. I-underflow evela kwi-spiral classifier, equkethe izinto ezijulile, ivame ukubuyiselwa kubholo imishini ukuze iqhubeke nokugaya, kanti i-overflow, equkethe izinto ezikhishwayo, iya esigabeni sokukhulisa.

5. Isigaba sokugxila

5.1 Ukugijima

Umqhubu oluhlukanisiwe ovuthwe ngobuningi ngokuphambene kwe-spiral classifier kuqala ufakwa kwijigger. Ijigger yithuluzi lokuhlukanisa ngokudonswa kwesisindo esisekelwa umehluko kusisindo esikhethekile samaminerali e-chromite kanye nezinto ezingezona. I-chromite inokwehluka okuphezulu kwesisekelo uma kuqhathaniswa namanye amaminerali ahlukaniswa njengegangue. Ku-jigger, kusetshenziswa ukugeleza kwamanzi okungahlali, okubangela ukuthi ama-chromite anesisindo esikhulu aphumele phansi, kuyilapho ama-gangue alula esehlala ezinhlangeni eziphakeme. Umkhiqizo osezansi ovela ku-jigger uyindawo egcwele i-chromite, efakwa esithombeni so-concentrate, kuyilapho umpodisi phakathi nezingcezu mencane nemfucumfucu kusebenza nakakhulu.

5.2 Ukuhlukaniswa Kwe-Spiral Chute

Ore emaphakathi evela ku-jigger ifakwa ku-spiral chute. I-spiral chute iyothuluzi oluphindehlisa izinto olusebenzisa imiphumela ehlanganisiwe yomgogodla, amandla okuphindaphinda, nokuchichima ukuhlukanisa izinhlayiya. Njengoba isihlabathi sensimbi sihamba phansi kwe-spiral chute, izinhlayiya ezinkulu ze-chromite zihamba ziya ngaphakathi kwe-chute futhi ziqoqwa njengokugcizelela, kuyilapho izinhlayiya ezincane ze-gangue zihamba ziya ngaphandle futhi ziphonswa njenge-tailings. I-concentrate evela ku-spiral chute iphinde ithunyelwe esilohweni se-concentrate, futhi i-ore emaphakathi ingaphinde icutshungulwe ngokwengeziwe.

5.3 Ukwehlukana Kwetafula Lokush shake

Isilungu esasenkuntolongeni esimaphakathi kanye neminye imikhiqizo ephakathi kuhlanganiswe etafuleni lokukhalitsa ukuze kuhlukaniswe kabanzi. Amatafula okukhwahlula azisebenza kahle kakhulu ekwahlukaniseni izinto ezincane ngokususelwa kumgomo wazo wokuphuma komzimba, isimo, nosayizi. Itafeleni lokukhalitsa line-ubuso obuyisiqephu obuynikaza, obudonsa, okubangela ukuthi izinto zihambe ngendlela yezigaba ezihlabazayo. Izimbobo ezinzima ze-chromite zihamba kancane futhi zigxila emaphethelweni aphansi etafuleni, kuyilapho izinto ezilula ze-gangue zihamba ngokushesha kakhulu futhi zikhishwa emaphethelweni aphezulu. Ama-tafula okukhwahlula amaningi angasetshenziswa ngokulandelana ukuze kufezwe izinga eliphezulu lokwahlukanisa nokukhiqiza ukunqanyulwa kwe-chromite okuphezulu.

6. Isigaba Sokukhipha Amanzi

6.1 Ukuqina

I-chromite concentrate evela esigabeni sokuhlukaniswa iqukethe inani elikhulu lamanzi. Ukuze kuncishiswe okuqukethwe kwamanzi, i-concentrate iqala ihanjiswe esikhumulweni sokuqina. Isikhumulweni sokuqina sitholakala cishe sibe yisitshalo esikhulu esicilindrike lapho i-concentrate slurry ivunyelwe ukuba ihlale ngokuhlanganyela nomthelela wezinto ezisezandleni. Njengoba ama-particles ehla, amanzi acacile phezulu ayahliswa, futhi i-concentrate eqinile ethola phansi iyakhishwa. Isikhumulweni sokuqina sisiza ukukhulisa okuqukethwe kwezinto eziqinile ze-concentrate kusukela cishe emhlabeni phakathi kuka-20 - 30% kuya ku-40 - 60%.

6.2 Ukuhlunga kweVacuum

Ngemva kokugcwaliswa, i-concentrate eqinileyo ifakwa kufilitha ye-vacuum. Ifilitha ye-vacuum isebenzisa umphindo we-vacuum ukukha amanzi ngokusebenzisa indawo yesihlungi, ishiyela umquba wefilitha we-chromite concentrate. Inqubo yokuhlunga nge-vacuum iphinde yehlise kakhulu umkhawulo wamanzi ku-concentrate ukuze kufinyelelwe ezingeni elifanele lokugcina nokuhamba, ngokuvamile cishe ama-8-12%. I-chromite concentrate eshiswe yona ifakwa ku-silo ye-concentrate ukuze igcinwe ngokugcwele.

7. Ukulahla i-Tailings

Izinsalela zemikhakha ehlukene yokuhlukanisa, ezikakhulukazi ziqukethe izinto zokungegeza, ziyoqoqwa kwaye zihlale ngendlela enoxanduva kwemvelo. Izinsalela zingagcinwa kwizitshalakazi zezinsalela okanye ziphathwe ngenye indlela ukuze kubuyekezwe amanyala alahlekelwe ematsheni asemqoka akwiminerali anokuwusiza noma ukuze kuncitshiswe impembelelo yemvelo yazo. Kwezinye izimo, izinsalela zingaphinde zibalwa ngokusebenzisa indlela ezengeziwe zokuhlukanisa ukuze kwandiswe ukubuyiselwa konke kwe-chromite kumgodi okhishwe kuwo.

Ukuhlela Inqubo Nokubhekana Nezinkinga

Ukusebenza Okuhle Kwemisebenzi

Ukuze kuthuthukiswe ukusebenza kahle kanye nokukhawulela kwezomnotho inqubo yokuzuza amagugu e-chromite, izinyathelo eziningana zokwenza ngcono zingathathwa. Lezi zifaka ukulungisa izilawuli zokucindezela nokugaya ukuze kufinyelele ukukhipha okungcono kwamaminerali e-chromite ngenkathi kuphuculwa ukusetshenziswa kwamandla. Ukukhetha nokulungisa izilawuli zemishini yokuhlukanisa, njengeyomjovo wamanzi ku-jiggers kanye nobukhulu bokuvunguza kwe-shaking table, nakho kungaba nomphumela omkhulu ekusebenzeni kahle kokuhlukanisa. Ngaphezu kwalokho, ukusetshenziswa kwezinhlelo zokulawula inqubo ezisezingeni eliphezulu kungasiza ukulawula nokulungisa inqubo ngesikhathi sangempela, kuqinisekise ukusebenza okuqhubekayo nokukhipha umkhiqizo osezingeni eliphezulu.

Izinselele

Inqubo yokuthuthukisa ubuchwepheshe bechromite ore iphinde bahlangabezane nezinselele ezimbalwa. Enye yezinselele ezisemqoka ukujwayela ukuhluka kwezinga lenqubo yezimayini ezingavuthiwe. Imingcele yendawo yomthombo weChromite ingaba nokuhluka okukhulu ekutholeni izinto zomfanekiso, izinga, nokusabalalisa kobukhulu bamaphakethe, okungase kuthinte ukusebenza kwenqubo yokuthuthukisa. Enye inselele ukuvikeleka kwemvelo. Inqubo yokuthuthukisa ikhiqiza inqwaba yemikhondo, okudingeka ibephathwe kahle ukuvimbela ukungcoliswa kwemvelo. Ngaphezu kwalokho, ukusebenzisa amanzi enqubo kungaba yingxenye yezinkinga ezindaweni ezifuna amanzi kakhulu, futhi kuyadingeka umzamo wokuthuthukisa ezobuchwepheshe bokonga amanzi kanye nokuphinda kusetshwe amanzi.

Inqubo yokuthuthukiswa kwe-chromite ore iyinqubo eyinkimbinkimbi futhi enezigaba eziningi ezihilela uchungechunge lwezindlela zokuhlukaniswa kwezinto ukuze kudalwe amaminithi e-chromite abalulekile ekuhloleni okokusebenza. Izigaba ngakunye, kusuka ekuphathweni kokokusebenza okujwayelekile kuya ekukhiqizeni okuqukethwe kwe-chromite kanye nokulahla imfucuza, idlala indima ebalulekile ekuqinisekiseni ukusebenza kahle nokusebenza kahle kwenqubo. Ngokuqonda izimiso nezinhlelo zezigaba ngakunye, kanye nokubhekisisa izinselelo namathuba okuhlela, umkhakha wokuthuthukiswa kwe-chromite ore ungakwazi ukuqhubeka uthuthukisa ukusebenza kwawo futhi ungeze ekunikezeni ukuhlinzekwa okuph sustainable kwe-chromium kwezinye izinhlelo zokusebenza zezimboni.