Kev nplua nuj Natural Resources ntawm Niobium

Raws li cov txheeb cais, lub ntiaj teb tag nrho cov niobium reserves ntawm txog 38 lab tons. Brazil yog lub ntiaj teb thawj niobium cov peev txheej hauv lub tebchaws, nws cov peev txheej thiab kev tsim khoom, cov peev txheej loj tshaj plaws ntawm 23 lab tons, suav txog 60% ntawm lub ntiaj teb tag nrho. Nws ua raws li Australia, Canada, yav dhau los Soviet Union thiab lwm lub tebchaws. Tuam Tshoj kuj yog ib tug nplua nuj niobium kev pab, reserves accounted txog li 17% ntawm lub ntiaj teb no tag nrho. Cov nplua nuj natural resources yog qhov tseem ceeb guarantee thiab superior tej yam kev mob rau txoj kev loj hlob ntawm niobium kev lag luam. Nyob rau hauv xyoo tas los no, lub ntiaj teb kev thov rau niobium zoo li ruaj khov. Table 1 teev cov kev noj ntawm niobium (Nb2O5) nyob rau hauv lub ntiaj teb no los ntawm 1988 txog 1997, nrog rau qhov nruab nrab txhua xyoo noj ntau tshaj 2.11 lab tons. Kev siv los ntawm lub tebchaws thiab cheeb tsam: 34% hauv Tebchaws Europe, 30% hauv North America, 32% hauv Nyiv, 4% hauv lwm lub tebchaws; los ntawm daim ntawv thov: 35% nyob rau hauv steel additives, 12% nyob rau hauv stainless hlau, 10% nyob rau hauv ultra-high-temperature alloys, thiab 3% nyob rau hauv lwm yam kev siv.2 Niobium daim ntaub ntawv nyob rau hauv ntau yam kev lag luam teb

Vim nws qhov siab melting point, siab zog, kub tsis kam, zoo thermal conductivity, tsawg neutron capture cross-section thiab lwm yam zoo zog, niobium yog ib yam khoom tseem ceeb nyob rau hauv niaj hnub high-tech industries. Niobium yog ob qho tib si cov khoom siv zoo heev thiab cov khoom siv tshwj xeeb. Feem ntau, raws li cov khoom nruab nrab ntawm niobium, daim ntawv thov raug faib ua ob pawg, ib qho yog kom muaj 50% ~ 70% ntawm cov hlau niobium tus qauv qib ferro-niobium ua raw khoom, kev tsim cov khoom siv, feem ntau yog siv rau hauv cov khoom siv niobium. hlau thiab steel kev lag luam; Qhov thib ob yog kev rho tawm, chlorination thiab lwm txoj hauv kev ntawm niobium oxide raws li cov khoom siv raw, kev tsim cov niobium alloys, carbide, monocrystalline, qib siab ferro-niobium, thiab lwm yam, yog siv rau hauv kev siv tshuab siab, cov ntaub ntawv ua haujlwm, tab sis kuj siv los ua cov khoom siv tshwj xeeb.