35 feem pua ntawm lub ntiaj teb tsis tshua muaj neeg noj los ntawmrare ntiaj teb mus tas li hlau nplaumcov ntaub ntawv, suav txog li 91 feem pua ntawm cov nqi noj. Tau txais txiaj ntsig los ntawm kev txhim kho sai ntawm cov tsheb tshiab lub zog thiab kev lag luam hluav taws xob, cov khoom siv hlau nplaum tsis tshua muaj hauv ntiaj teb rau cov feem ntau ntawm cov khoom siv hauv ntiaj teb tsawg tsawg ntawm 35 feem pua.
Kev faib tawm thoob ntiaj teb ntawm cov peev txheej tsawg hauv ntiaj teb yog qhov tseem ceeb, nrog Tuam Tshoj suav txog ze li 40 feem pua. Raws li cov ntaub ntawv tshaj tawm los ntawm Tebchaws Meskas Geological Survey (USGS), tag nrho cov peev txheej ntawm cov khoom siv hauv ntiaj teb tsis tshua muaj nyob hauv ntiaj teb yog kwv yees li 120 lab tons, suav nrog Tuam Tshoj cov peev txheej yog 44 lab tons, suav txog kwv yees li 36.7 feem pua, thiab Nyab Laj cov reserves yog 22. lab tons, suav txog li 18.3 feem pua. Brazil lub reserves yog 21 lab tons, accounting rau 17.5 feem pua, thiab Russia lub reserves yog 12 lab tons, accounting rau 10.0 feem pua. Plaub lub tebchaws ua ke suav nrog ntau dua 80 feem pua ntawm lub ntiaj teb cov peev txheej tag nrho, thiab cov peev txheej tseem ceeb yog qhov siab.
Qhov kev faib ua feem ntawm cov khoom siv hlau nplaum ruaj khov nyob hauv Suav teb tsis tshua muaj lub ntiaj teb noj yog ntau dua li ntawm lwm qhov chaw, ntau dua 40 feem pua. Raws li cov ntaub ntawv los ntawm Zhiyan Consulting, xyoo 2019, cov khoom siv hlau nplaum ruaj khov suav nrog ntau dua 40 feem pua ntawm Tuam Tshoj cov khoom siv tsawg hauv ntiaj teb, smelting, machinery, petrochemicals, thiab iav ceramics suav txog 12 feem pua, 9 feem pua, thiab 8 feem pua. Hydrogen cia cov ntaub ntawv thiab luminescence Cov ntaub ntawv txhua tus accounted rau 7 feem pua, catalytic cov ntaub ntawv, polishing cov ntaub ntawv, thiab ua liaj ua teb textiles txhua accounted rau 5 feem pua. Los ntawm qhov kev xav ntawm lub ntiaj teb tsis tshua muaj lub ntiaj teb ruaj khov hlau nplaum ntau lawm, sintered NdFeB hlau nplaum yog tib yam khoom siv tsis tshua muaj hauv ntiaj teb uas tau ua tiav cov txiaj ntsig zoo, uas ua pov thawj tias qhov kev vam meej siab ntawm siab - kev lag luam khoom siv hlau nplaum ua haujlwm tau zoo. upstream khoom qauv hloov kho.
Tsis tshua muaj lub ntiaj teb cov khoom siv hlau nplaum ruaj khov muaj kev ua tau zoo piv nrog cov hlau thiab ferrite ruaj khov hlau nplaum cov ntaub ntawv. Nd-Fe-B yog cov khoom siv hlau nplaum ruaj khov tshaj plaws kom deb li deb, thiab nws yog siv dav tshaj plaws. Cov hlau nplaum tas mus li yog cov hlau nplaum uas tuaj yeem tuav lawv cov hlau nplaum ntev ntev tom qab tau hlau nplaum thiab tuaj yeem muab faib ua peb pawg: cov khoom siv hlau nplaum ruaj khov, cov khoom siv hlau nplaum ruaj khov ferrite, thiab cov khoom siv hlau nplaum tsis tshua muaj hauv ntiaj teb. Txawm hais tias cov khoom siv hlau nplaum ruaj khov thiab cov khoom siv hlau nplaum ferrite ruaj khov muaj qhov zoo ntawm tus nqi pheej yig thiab cov khoom siv txaus, lawv cov khoom siv hluav taws xob sib nqus siab tshaj plaws (B·H) max yog feem ntau tsawg dua 100 kJ / m3, thiab lawv cov khoom sib nqus yog cov tsis zoo, yog li lawv maj mam hloov los ntawm tsawg lub ntiaj teb cov hlau nplaum ruaj khov. hloov los ntawm cov khoom sib nqus. Hauv kev tsim cov khoom siv hlau nplaum tsis tshua muaj hauv ntiaj teb, nws tau ntsib peb theem ntawm kev txhim kho: thawj tiam ntawm SmCo5, tiam thib ob ntawm SM2Co17, thiab tiam thib peb ntawm Nd2Fe14B. Tam sim no, tiam thib plaub ntawm hlau-nitrogen (carbon) cov hlau nplaum ruaj khov tseem nyob rau hauv kev tshawb fawb thiab kev loj hlob theem, uas yog deb ntawm industrialization. Tseem muaj qee qhov deb.
