Njira Yopangira Zitsulo za Platinamu pa Zodzikongoletsera
Platinum ndi imodzi mwa zitsulo zamtengo wapatali zomwe zimagwiritsidwa ntchito kwambiri mumakampani opanga zodzikongoletsera. Mtundu wake woyera wachilengedwe umalimbana ndi kuipitsidwa ndipo umadziwika kuti umakhala wotetezeka kwambiri ku dzimbiri. Kuphatikiza apo, kuchuluka kwa platinum kumapangitsa kuti ikhale "yolemera" komanso yapamwamba. Komabe, kumbuyo kwa mawonekedwe ake okongola pali njira yayitali komanso yovuta isanasinthidwe platinum kuchokera kuzinthu zochotsedwa kukhala mphete, mkanda, kapena ndolo zapamwamba. Nkhaniyi ikufotokoza magawo ofunikira opangira platinum pazodzikongoletsera, kuyambira kumigodi mpaka kumaliza.
1. Chiyambi cha Platinum ndi Makhalidwe Ake
Platinum (Pt) ndi chitsulo chosinthika chosowa kwambiri padziko lapansi. Nthawi zambiri chimapezeka pamodzi ndi zitsulo zina za gulu la platinum (PGMs), monga palladium, rhodium, iridium, ruthenium, ndi osmium. Ma depositi akuluakulu amapezeka ku South Africa, Russia, ndi Canada. Chifukwa cha kusowa kwake, kuchuluka kwa miyala yofunikira kuti apange platinum yoyera ndi kwakukulu. Izi zimapangitsa kuti ikhale yamtengo wapatali.
Mwachibadwa chake, platinamu ili ndi malo osungunuka pafupifupi 1.768°C—okwera kwambiri kuposa golide. Ilinso ndi ductile (yosavuta kusungunuka) koma yamphamvu, zomwe zimapangitsa kuti ikhale yoyenera kuyika miyala yamtengo wapatali monga diamondi. Platinamu siisungunuka mosavuta ndipo sichita dzimbiri, zomwe zimapangitsa kuti ikhale yoyenera kugwiritsidwa ntchito pazodzikongoletsera za tsiku ndi tsiku.
2. Gawo la Kukumba: Kutulutsa Madera Ochokera Padziko Lapansi
Njira zopangira platinamu imayamba ndi migodi ya miyala. Njira zogwirira ntchito zimadalira momwe nthaka ilili, ndipo zimatha kukhala m'malo otseguka kapena pansi pa nthaka. Migodi yambiri ikuluikulu ya platinamu imagwiritsa ntchito migodi ya pansi pa nthaka chifukwa migodiyo ili mkati mwa miyala inayake.
Kenako mwala wokhala ndi PGM umasamutsidwira ku malo opangira zinthu. Kuchuluka kwa platinamu mu miyala yamtengo wapatali nthawi zambiri kumakhala kochepa kwambiri, zomwe zimafuna migodi yayikulu kuti ipeze zokolola zokwanira. Pa siteji iyi, kuchita bwino komanso kuyang'anira momwe zinthu zilili ndi chilengedwe ndikofunikira kwambiri, chifukwa ntchito zofukula migodi zimapanga zinyalala za miyala ndipo zimafuna kugwiritsa ntchito mphamvu zambiri.
3. Kuphwanya ndi Kupera: Kuchepetsa Kukula kwa Zipangizo
Mchere ukafika pa mphero, mwalawo umaphwanyidwa (kuphwanyidwa) kukhala zidutswa zing'onozing'ono. Kenako umaphwanyidwa kuti upange tinthu tating'onoting'ono. Cholinga cha gawoli ndikutulutsa tinthu tamtengo wapatali ta mchere tomwe tinali titamangidwa kale mu miyala.
Kupera kumachitika pogwiritsa ntchito makina akuluakulu monga mipiringidzo ya mpira kapena mipiringidzo ya ndodo. Tinthu tating'onoting'ono tikakhala tating'ono kwambiri, mwayi woti mchere wa platinamu ulekanitsidwe umakula kwambiri pakapita nthawi. Komabe, kupera pang'ono kwambiri kumafunanso mphamvu zambiri ndipo kungakhudze magwiridwe antchito a kugawa, kotero mipiringidzo nthawi zambiri imakulitsa kukula kwa cholinga.
4. Kuyika Maganizo Pogwiritsa Ntchito Kuyandama
Gawo lotsatira ndi kuchuluka kwa mchere, komwe kumasiyanitsa mchere wokhala ndi platinamu ndi zinthu zosafunika. Njira imodzi yodziwika bwino ndi kuyandama (froth flotation). Njira imeneyi imagwiritsa ntchito kusiyana kwa zinthu za pamwamba pa mchere: mchere wina ukhoza "kumatirira" ku thovu la mpweya ndikukwera pamwamba, pomwe wina amakhalabe m'madzi.
Poyandama, matope a mkuwa (osakaniza a miyala ndi madzi) amasakanizidwa ndi mankhwala enaake, kenako mpweya umawombedwa. Michere yomwe ikufunika imakwezedwa pamodzi ndi thovu, ndikupanga PGM concentrate. Zotsatira za kuyandama ndi concentrate yokhala ndi PGM yambiri kuposa miyala yoyambirira, ngakhale kuti ikadali yoyera kwambiri.
5. Kusungunula ndi Kuyeretsa Koyamba
Kenako PGM concentrate imatumizidwa ku njira yosungunulira yotentha kwambiri mu ng'anjo. Njirayi cholinga chake ndi kulekanitsa chitsulo ndi zonyansa zambiri popanga slag. Mu ntchito zamafakitale, kusungunulira kumatha kukhala ndi magawo angapo, kuphatikizapo kukonza kuti apange matte (chisakanizo cha sulfide yachitsulo) yokhala ndi ma PGM ambiri.
Pambuyo posungunula, kusintha ndi kuyeretsa koyamba kumachitika kuti achepetse kuchuluka kwa zinthu monga chitsulo, sulfure, kapena zitsulo zina zoyambira. Gawoli ndi laukadaulo kwambiri ndipo limafuna kuwongolera kutentha ndi kapangidwe ka mankhwala. Platinamu yomwe imapangidwa pagawoli si chitsulo choyera, chokonzeka kugwiritsidwa ntchito, koma ndi chisakanizo chomwe chimafuna kulekanitsidwa kwa mankhwala.
6. Kuyeretsa Mankhwala: Kulekanitsa Platinamu ndi Ma PGM Ena
Iyi ndi imodzi mwa magawo ovuta kwambiri: kuyenga mankhwala. Popeza platinamu nthawi zambiri imakhalapo ndi ma PGM ena, njira zolekanitsira mankhwala zimafunika kuti platinamu ikhale yoyera kwambiri.
Kawirikawiri, njirayi imaphatikizapo kusungunula zinthuzo mu njira inayake ya mankhwala (monga kugwiritsa ntchito aqua regia pansi pa mikhalidwe ina), kutsatiridwa ndi mvula yosankhidwa ndi kutulutsa kuti zilekanitse zinthuzo. Chitsulo chilichonse cha PGM chili ndi khalidwe losiyana la mankhwala, zomwe zimathandiza kuti pakhale kulekanitsidwa kwa magawo ambiri. Platinamu ikalekanitsidwa, imatha kubwezeretsedwanso ngati chophatikiza, kenako nkusinthidwa kukhala calcium kapena kuchepetsedwa kukhala chitsulo.
Zotsatira zake ndi platinamu yoyera kwambiri (monga 99,95% kapena kuposerapo), malinga ndi miyezo yamakampani.
7. Kupanga Zodzikongoletsera za Platinamu
Platinamu yopangira zodzikongoletsera siigwiritsidwa ntchito kawirikawiri ngati ili yoyera 100%, chifukwa zodzikongoletsera zimafuna kuphatikiza kuuma, kukana kukanda, komanso kugwira ntchito mosavuta. Chifukwa chake, platinamu nthawi zambiri imapangidwa ndi alloy. Muyezo wodziwika bwino ndi platinamu 950 (Pt950), kutanthauza 95% platinamu ndi 5% zitsulo zina monga iridium, ruthenium, cobalt, kapena palladium, kutengera mawonekedwe omwe mukufuna.
Kusankha aloyi kumakhudza zinthu zingapo zofunika: kuuma, mtundu, kusavuta kupangira, komanso kuthekera kogwira mwala wamtengo wapatali. Opanga zodzikongoletsera adzasintha njira yopangira aloyi kuti igwirizane ndi zosowa za kapangidwe ndi miyezo yaubwino.
8. Kupanga Zodzikongoletsera: Kupanga kapena Kupanga
Pali njira ziwiri zazikulu zopangira zodzikongoletsera za platinamu:
1. Kuponya: Platinamu imasungunuka kenako nkuthiridwa mu chikombole, nthawi zambiri pogwiritsa ntchito njira yopangira ndalama. Popeza malo osungunuka a platinamu ndi okwera kwambiri, zida zopangira ziyenera kupirira kutentha kwambiri, ndipo kuwongolera njira kuyenera kukhala kolondola kuti zitsimikizire kuti mapeto ake ndi oboola.
2. Kupanga (kupanga ndi manja/makina): Platinamu imapangidwa kuchokera ku mipiringidzo kapena mapepala pogwiritsa ntchito njira monga kukulunga, kuumba, kujambula, ndi kusungunula mwapadera. Njirayi ndi yotchuka pa zodzikongoletsera zokhala ndi tsatanetsatane waukadaulo komanso mphamvu yabwino kwambiri yomangira.
Pa gawo ili, mmisiri kapena fakitale imapanganso zinthu monga mphete ya shank (gawo lozungulira mphete), zikhadabo za miyala, kapena zokonzera zapadera za mwala wamtengo wapatali.
9. Kumaliza Komaliza: Kuyeretsa, Kupukuta, ndi Kuyika Mwala
Akamaliza kupanga zodzikongoletsera, kumaliza kumachitika. Gawo lomaliza limaphatikizapo kupukuta bwino, kupukuta, ndi kuyang'ana mawonekedwe a zinthu zomwe zili ndi zolakwika. Platinamu imadziwika kuti "siivala ngati golide," koma imatha kukhala ndi utoto wofewa pakapita nthawi. Anthu ambiri amakonda utoto chifukwa umawonjezera mawonekedwe ake, koma ukhozanso kukonzedwanso kuti ubwezeretse kuwala kwake.
Ngati zodzikongoletserazo zimagwiritsa ntchito miyala yamtengo wapatali, zimayikidwa ndi katswiri. Platinamu ndi yabwino kwambiri pakupanga diamondi chifukwa cha kugwira kwake kolimba komanso kokhazikika. Miyalayo ikayikidwa, zodzikongoletserazo zimayesedwa bwino, kuphatikizapo kulemera, kulinganiza ma prong, kufanana, komanso chitonthozo.
10. Kulemba Zolemba ndi Miyezo Yabwino
Zodzikongoletsera zabwino za platinamu nthawi zambiri zimasindikizidwa ndi giredi monga "Pt950," "Plat950," kapena "950." Chidindo ichi n'chofunikira ngati chitsimikizo cha giredi ya platinamu. Kuphatikiza apo, opanga odziwika bwino nthawi zambiri amatsatira miyezo yeniyeni yokhudza kulekerera giredi, ukhondo wa zinthu, ndi njira zopangira.
Mu msika wa zodzikongoletsera, kuwonekera poyera pankhani ya kuchuluka kwa platinamu, mtundu wa aloyi, ndi luso laukadaulo ndizofunikira kwambiri podziwa mtengo womaliza wa chinthu.
Kutseka
Njira yopangira platinamu yopangira zodzikongoletsera ndi njira yayitali yomwe imaphatikizapo migodi, kuchuluka kwa mchere, kusungunula, kuyeretsa mankhwala ovuta, kusakaniza, ndi kupanga ndi kumaliza molondola. Kuphatikiza kwa zinthu zosowa, zovuta zokonza, ndi mawonekedwe apamwamba a thupi zimapangitsa platinamu kukhala chisankho chapamwamba kwambiri padziko lonse la zodzikongoletsera. Mukavala zodzikongoletsera za platinamu, mumakhala mukuvala zinthu zopangidwa ndi ukadaulo wa zitsulo, luso la zaluso, komanso ulendo wautali wa zinthuzo kuchokera pansi pa nthaka kupita ku chizindikiro cha kukongola.
