He rauemi nui te chromite mō te whakarewa i ngā koranu whakarewa, te maitai kore waikura me ngā koranu utu nui. E 60% te chromium e whakamahia ana e te umanga whakarewa, e whakamahia ana hei hanga maitai koranu, inā koa te maitai kore waikura. I taua wā anō, e whakamahia whānuitia ana te chromite i roto i te umanga ātete ahi, te umanga matū me te umanga māmā.
Ngā āhuatanga o te konganuku
Neke atu i te rima tekau ngā momo kohuke kei roto te chromium e kitea ana i te taiao, engari ko ngā kohuke kei roto te chromium anake he uara ahumahi ko te chromite, arā, ko te spinel (MgO, Al2O3), te magnesia chromite (MgO, Cr2O3), me te magnetite. (FeO, Fe2O3) me ētahi atu otinga totoka. I roto i te ariā, ko te tātai matū o te chromite ko FeO, Cr2O3, kei roto ko te 68% Cr2O3, 32% FeO, he aukume waenga, he mātotoru 4.1~4.7g/cm3, he pakeke Mohs 5.5~6.5, ā, ko te āhua o te mata mai i te mangu ki te parauri pouri. Ko ngā kohuke gangue ko te olivine, te serpentine me te pyroxene, i ētahi wā ka haere tahi me te iti o ngā huānga rōpū vanadium, nickel, cobalt me te molybdenum.
Hangarau Tukatuka
He iti noa iho ngā rauemi chromite o Haina, ko te nuinga kei Tibet, Xinjiang, Mongolia o Roto, Gansu me ētahi atu kawanatanga. Ko ngā rauemi chromite o tāwāhi kei Awherika ki te Tonga, Rūhia, Brazil, Te Hononga o Amerika me ētahi atu whenua. Ko ngā āhuatanga o te chromite he matotoru te matotoru, he aukume waenga, ā, he matotoru ngā matūriki tioata. I te nuinga o te wā, ka whakarōpūhia mā te horoinga o te konganuku, te wehenga aukume ngoikore, te wehenga aukume kaha waenga, te wehenga ā-papa, te whakamānu me ētahi atu tukanga.
Tikanga horoi
He pai mō te konganuku kōromita matotoru, he kounga teitei te konganuku mata, ā, ko te nuinga he paru uku rite ki te uku. Ka taea te whiriwhiri i ngā hua matotoru kua tohua mā te horoi noa.
Wehenga aukume
He āhuatanga aukume waenga te Chromite, ā, ka taea te wehewehe mā te wehenga aukume kaha maroke, māku rānei. Ka wehea tuatahitia te aukume e hono ana mā te aukume ngoikore, kātahi ka wehea mā te aukume mā te CXJ, CFLJ rānei, te wehenga aukume pereti, te wehenga aukume porowhita teitei poutū, me ētahi atu. Ka mahi ngā taputapu i te whakapainga maroke me te māku, ā, ka taea te whiriwhiri i ngā hua kukū whai tohu. He painga tō te tikanga wehenga aukume, arā, he nui te kaha tukatuka me ngā tohu pumau.
Pae tono chromite o Āwherika ki te Tonga
Te whakarōpūtanga pāpāho taumaha
Ko te taumaha motuhake o te chromite he 4.1~4.7g/cm3, ā, ko te taumaha motuhake o ngā kohuke gangue me te rino silicate e pā ana ko te 2.7~3.2g/cm3. Mā te whakamahi i te rerekētanga o te mātotoru i waenga i ngā kohuke, ka taea te whakamahi i te chute porowhita, te jigging, te tēpu wiri, te whakamahi pai porowhita. Ka taea te whakamahi i ngā mīhini, ngā centrifuges me ētahi atu taputapu whakarōpū taumaha mō te whakarōpū. He pai tēnei tikanga mō te chromite he matotoru ake te rahi o te kōhao tioata, ā, ka ngawari te ngaro o ngā matūriki angiangi i roto i ngā toenga.
Te Whakaterenga
Ka taea e te chromite te whakamahi i ngā kaikohi waikawa ngako, i ngā kaikohi amine rānei hei whiriwhiri i ngā kukū kua tohua mā roto i ngā tukanga tātā me te horoi i raro i ngā āhuatanga pH e tika ana. He pai mō ngā chromite kikokore me ngā chromite kikokore.
Te whakapai ake i te matū
Mō ētahi konganuku chrome he uaua ki te tukatuka mā te whakamahi i ngā tikanga whakapainga ā-ringa, ka whakamahia te tukanga whakapainga-matū whakakotahi, te tikanga matū kotahi rānei. Ko ngā tikanga whakapainga matū ko: te tango whiriwhiri, te tango matū whero, te wehenga whakakā, te tango waikawa whanariki me te waikawa chromic, te tango whakaiti me te tango waikawa whanariki, me ētahi atu.
Tauira painga
Ko te taumata o te Cr2O3 kei roto i tētahi puranga chromite i Āwherika ki te Tonga he 24.80%. He kohinga anō tēnei o ngā puranga i te papaanga. Ko te rahi o te tauira he -40 mata, ā, he ōrite te rahi o te matūriki. Kei roto te chromite i ngā matūriki angiangi me ngā tinana me ngā whakaurunga e piri tahi ana. Ko ngā kohuke gangue matua he olivine me te pyroxene, me te iti o te paru angiangi. E ai ki te āhua o ngā tauira o te konganuku, ka whakatūria te tukanga whakapai ake hei mowhiti papatahi, poutū rānei, he whakakoi kotahi-taahiraa.
Ko te chromite pai-kikokiko kei roto i ngā toenga o te wehenga taumaha o te hāora kei runga i te papaanga ka whakamahi i tētahi tukanga wehenga aukume kaha, he pereti papatahi, he mowhiti poutū rānei, ka taea te tīpako i ngā hua kukū whai tohu. Ko ngā kohuke kei roto te chromium i roto i te hiku aukume he whakaurunga pai-kikokiko, he ētahi atu kohuke kore-utu rānei kua tutuki i ngā tohu painga pai.
Wā tuku: Oketopa-12-2021