Vale yatulutsa pafupifupi matani 250,000 a mchenga wokhazikika, womwe umatsimikiziridwa kuti ulowa m'malo mwa mchenga womwe nthawi zambiri umakumbidwa mosaloledwa.

Pambuyo pazaka 7 za kafukufuku ndi ndalama pafupifupi 50 miliyoni reais, Vale yapanga njira yopangira zinthu zamchenga zapamwamba, zomwe zingagwiritsidwe ntchito pomanga.Kampaniyo yagwiritsa ntchito njira yopangira mchenga ku malo opangira chitsulo ku Minas Gerais, ndikusintha zida zamchenga zomwe poyambirira zimafunikira kugwiritsa ntchito madamu kapena njira zodulira zinthu.Kapangidwe kake Kutengera kuwongolera kwamtundu womwewo monga kupanga chitsulo.Chaka chino, kampaniyo yakonza ndi kupanga matani pafupifupi 250,000 a mchenga wosasunthika, ndipo kampaniyo ikukonzekera kugulitsa kapena kupereka ndalamazo popanga konkire, matope ndi simenti kapena kupanga miyala.

Bambo Marcello Spinelli, Wachiwiri Wachiwiri kwa Pulezidenti wa Vale's Iron Ore Business, adanena kuti mchenga wa mchenga ndi zotsatira za ntchito zokhazikika.Iye adati: “Ntchitoyi yatipangitsa kupanga chuma chozungulira mkati.Pali kufunikira kwakukulu kwa mchenga pantchito yomanga.Zogulitsa zathu zamchenga zimapereka njira yodalirika yogwirira ntchito yomanga, pomwe zimachepetsa kuwononga chilengedwe komanso chikhalidwe cha anthu chifukwa cha kutaya michira.Chikoka.”

Malo osungiramo migodi ya Bulkoutu yokhazikika yosungiramo mchenga

Malinga ndi kuyerekezera kwa United Nations, padziko lonse lapansi pakufunika mchenga pafupifupi matani 40 mpaka 50 biliyoni.Mchenga wasanduka gwero lachilengedwe logwiritsiridwa ntchito kwambiri pambuyo pa madzi, ndipo gwero limeneli likugwiritsiridwa ntchito mosaloledwa ndi lamulo ndi lodyera anthu padziko lonse lapansi.

Mchenga wokhazikika wa Vale umatengedwa ngati wopangidwa ndi chitsulo.Miyala yaiwisi yamtundu wa mwala wokumbidwa kuchokera ku chilengedwe imakhala chitsulo pambuyo pa njira zingapo zogwirira ntchito monga kuphwanya, kuyesa, kugaya ndi kupindula mu fakitale.Zatsopano za Vale zagona pakukonzanso kwazitsulo zachitsulo pagawo lothandizira mpaka zitafika pamikhalidwe yofunikira ndikukhala malonda.M'machitidwe opindulira achikhalidwe, zida izi zitha kukhala ngati michira, yomwe imatayidwa pogwiritsa ntchito madamu kapena milu.Tsopano, tani iliyonse yamchenga yopangidwa imatanthauza kuchepetsedwa kwa tani imodzi ya michira.

Mchenga wopangidwa kuchokera kuzitsulo zachitsulo ndi zovomerezeka 100%.Amakhala ndi silicon yambiri komanso chitsulo chochepa kwambiri, ndipo amakhala ndi kufanana kwamankhwala komanso kukula kwa tinthu.Bambo Jefferson Corraide, woyang'anira wamkulu wa Brucutu ndi Agualimpa Integrated operations area, adanena kuti mtundu uwu wa mchenga siwowopsa."Zogulitsa zathu zamchenga zimakonzedwa ndi njira zakuthupi, ndipo mawonekedwe azinthuzo samasinthidwa panthawi yokonza, chifukwa chake zinthuzo sizowopsa komanso zopanda vuto."

Kugwiritsa ntchito mchenga wa Vale mu konkire ndi matope kwatsimikiziridwa posachedwa ndi Brazilian Institute of Scientific Research (IPT), Falcão Bauer ndi ConsultareLabCon, ma laboratories atatu akatswiri.

Ofufuza ochokera ku Institute of Sustainable Minerals ku yunivesite ya Queensland ku Australia ndi University of Geneva ku Switzerland akupanga kafukufuku wodziyimira pawokha kuti awunike mawonekedwe a mchenga wa Vale kuti amvetsetse ngati zomangira zina zomwe zimachokera ku ore zitha kukhala gwero lokhazikika. mchenga Ndipo kuchepetsa kwambiri kuchuluka kwa zinyalala zopangidwa ndi ntchito zamigodi.Ochita kafukufuku amagwiritsa ntchito mawu oti "oresand" kutanthauza zinthu zamchenga zomwe zimachokera kuzinthu zopangidwa ndi miyala yamtengo wapatali komanso zopangidwa mwa kukonza.

kupanga

Vale akudzipereka kugulitsa kapena kupereka matani oposa 1 miliyoni a mchenga wa 2022. Ogula ake amachokera kumadera anayi kuphatikizapo Minas Gerais, Espirito Santo, Sao Paulo ndi Brasilia.Kampaniyo imalosera kuti pofika 2023, zotulutsa zamchenga zidzafika matani 2 miliyoni.

"Ndife okonzeka kupititsa patsogolo msika wogwiritsa ntchito mchenga kuchokera ku 2023. Pachifukwa ichi, takhazikitsa gulu lodzipereka kuti ligwiritse ntchito bizinesi yatsopanoyi.Agwiritsa ntchito njira yopangira mchenga pakupanga komwe kulipo kuti akwaniritse zomwe msika ukufunikira. "Bambo Rogério Nogueira, Mtsogoleri wa Vale Iron Ore Marketing, adatero.

Vale pakali pano akupanga mchenga ku mgodi wa Brucutu ku San Gonzalo de Abaisau, Minas Gerais, womwe udzagulitsidwa kapena kuperekedwa.

Madera ena amigodi ku Minas Gerais akupanganso kusintha kwa chilengedwe ndi migodi kuti aphatikize njira zopangira mchenga.“Madera amigodiwa amatulutsa zinthu zamchenga zokhala ndi silikoni wambiri, zomwe zitha kugwiritsidwa ntchito m'mafakitale osiyanasiyana.Tikugwirizana ndi mabungwe ambiri kuphatikizapo mayunivesite, malo ofufuza ndi makampani apakhomo ndi akunja kuti apange njira zatsopano zoperekera zitsulo zatsopano zachitsulo.Njira yotulukira."Bambo André Vilhena, woyang'anira bizinesi watsopano wa Vale anatsindika.

Kuwonjezera pa kugwiritsa ntchito zipangizo zomwe zilipo m'dera la migodi yachitsulo, Vale yakhazikitsanso mayendedwe ophatikizira njanji ndi misewu yonyamula zinthu zamchenga kupita kumayiko angapo ku Brazil.“Cholinga chathu ndikuwonetsetsa kuti bizinesi yachitsulo ikhazikika.Kupyolera mu bizinesi yatsopanoyi, tikuyembekeza kuchepetsa kuwononga chilengedwe, pamene tikufunafuna mipata yopititsa patsogolo ntchito ndi kuwonjezera ndalama.Bambo Verena anawonjezera.

zinthu zachilengedwe

Vale wakhala akupanga kafukufuku wokhudza tailings application kuyambira 2014. Chaka chatha, kampaniyo idatsegula Puku Brick Factory, yomwe ndi fakitale yoyamba yoyeserera kupanga zinthu zomanga pogwiritsa ntchito michira yochokera kumigodi ngati chinthu chachikulu.Chomeracho chili mdera la migodi ya Pico ku Itabilito, Minas Gerais, ndipo cholinga chake ndi kulimbikitsa chuma chozungulira pakukonza chitsulo.

Federal Center for Science and Technology Education ya Minas Gerais ndi Pico Brick Factory idakhazikitsa mgwirizano waukadaulo ndikutumiza ofufuza 10 kuphatikiza mapulofesa, akatswiri odziwa ntchito zasayansi, omaliza maphunziro, omaliza maphunziro awo komanso ophunzira aukadaulo kufakitale.Panthawi ya mgwirizano, tidzagwira ntchito pamalo a fakitale, ndipo zinthu zomwe zimagwiritsidwa ntchito panthawi ya kafukufuku ndi chitukuko sizigulitsidwa kunja.

Vale akugwirizananso ndi kampasi ya Itabira ya Federal University of Itajuba kuphunzira njira yogwiritsira ntchito mchenga popaka.Kampaniyo ikukonzekera kupereka zinthu zamchenga kumalo komweko kuti apangidwe.

Migodi yokhazikika

Kuphatikiza pakupanga zinthu zachilengedwe, Vale watenganso njira zina zochepetsera michira ndikupangitsa kuti ntchito zamigodi zikhale zokhazikika.Kampaniyo yadzipereka kupanga ukadaulo wowuma womwe sufuna madzi.Pakalipano, pafupifupi 70% ya mankhwala achitsulo a Vale amapangidwa kudzera muzitsulo zowuma, ndipo gawoli silidzasintha ngakhale pamene mphamvu yopanga pachaka ikuwonjezeka kufika matani 400 miliyoni ndipo ntchito zatsopano zikugwiritsidwa ntchito.Mu 2015, chitsulo chopangidwa ndi chitsulo chowuma chimangotenga 40% ya chiwerengero chonse.

Kaya ntchito youma ingagwiritsidwe ntchito ikugwirizana ndi ubwino wa chitsulo chokumbidwa.Chitsulo chachitsulo ku Carajás chili ndi chitsulo chochuluka (kupitirira 65%), ndipo ndondomekoyi imangofunika kuphwanyidwa ndikuyesedwa malinga ndi kukula kwa tinthu.

Avereji yachitsulo m'madera ena amigodi ku Minas Gerais ndi 40%.Njira yochiritsira yachikhalidwe ndikuwonjezera chitsulo chachitsulo mwa kuwonjezera madzi ku beneficiation.Zambiri zomwe zimatsatiridwa zimayikidwa m'madamu kapena maenje.Vale wagwiritsa ntchito ukadaulo wina pothandizira ukadaulo wachitsulo wocheperako, womwe ndi ukadaulo wowuma wa maginito olekanitsa bwino (FDMS).Njira yolekanitsa maginito yachitsulo sichifuna madzi, choncho palibe chifukwa chogwiritsira ntchito madamu a tailings.

Tekinoloje yowuma yolekanitsa maginito ya ore yabwino idapangidwa ku Brazil ndi NewSteel, yomwe idagulidwa ndi Vale mu 2018, ndipo idagwiritsidwa ntchito pafakitale yoyendetsa ku Minas Gerais.Chomera choyamba chamalonda chidzagwiritsidwa ntchito m'dera la Vargem Grande ku 2023. Chomeracho chidzakhala ndi mphamvu yopanga pachaka ya matani 1.5 miliyoni ndi ndalama zonse za US $ 150 miliyoni.

Ukadaulo wina womwe ungachepetse kufunikira kwa madamu otsekera ndikusefa misala ndikusunga mumilu yowuma.Pambuyo pakupanga chitsulo chachitsulo chapachaka kufika matani 400 miliyoni, matani ambiri a 60 miliyoni (omwe amawerengera 15% ya mphamvu zonse zopanga) adzagwiritsa ntchito ukadaulo uwu kusefa ndi kusunga michira.Vale watsegula fakitale yosefera tailings kudera la migodi ya Great Varzhin, ndipo akufuna kutsegulanso zosefera zina zitatu mu kotala loyamba la 2022, imodzi yomwe ili mdera la migodi ya Brucutu ndipo ena awiri ali ku Itabira Mining area. .Pambuyo pake, chitsulo chopangidwa ndi chikhalidwe chonyowa chothandizira chidzangokwana 15% ya mphamvu zonse zopangira, ndipo tailings yopangidwa idzasungidwa m'madamu otchinga kapena maenje otsekedwa.