Kev siv ntawm Molybdenum

Molybdenum, zoo li tungsten, yog ib qho tsis tshua muaj hlau refractory. Txij li thaum xyoo 1778, tus kws tshawb fawb Swedish CW SCHEELE tau tshawb pom molybdenum keeb, tom qab ntau tshaj kaum xyoo ntawm kev siv zog M. MOISSAN los siv lub tshuab hluav taws xob los tsim cov hlau molybdenum, yog li ntawd tib neeg thawj zaug tau txais qhov no muaj ntau yam zoo heev ntawm lub cev thiab tshuaj thiab txhua yam. cov khoom ntawm cov hlau. Lub melting point ntawm molybdenum yog 2620 degree, vim lub inter-atomic bonding quab yuam yog tsis tshua muaj zog, yog li nyob rau hauv chav tsev kub thiab kub lub zog yog siab heev. Nws muaj ib tug me me coefficient ntawm expansion, loj hluav taws xob conductivity thiab zoo thermal conductivity. Nyob rau hauv chav tsev kub tsis hnov ​​​​mob nrog hydrochloric acid, hydrofluoric acid thiab alkali tov, tsuas yog yaj nyob rau hauv nitric acid, aqua regia los yog concentrated sulfuric acid, nyob rau hauv feem ntau cov kua hlau, non-metallic slag thiab molten iav kuj zoo heev. Yog li ntawd, molybdenum thiab nws cov alloys muaj ntau yam kev siv thiab kev cia siab zoo hauv cov haujlwm tseem ceeb xws li metallurgy, kev ua liaj ua teb, hluav taws xob, kev lag luam tshuaj, kev tiv thaiv ib puag ncig thiab astronautics, thiab tau dhau los ua cov khoom siv tseem ceeb thiab cov khoom siv tsis zoo hauv kev lag luam hauv lub tebchaws. Molybdenum nyob rau hauv lub ntiaj teb reserves yog me me, nws cov ntsiab lus tsuas yog 0.001% ntawm qhov hnyav ntawm lub ntiaj teb crust, molybdenum ore tag nrho reserves ntawm txog 15 lab tons, feem ntau faib nyob rau hauv lub tebchaws United States, Tuam Tshoj, Chile, Russia, Canada thiab lwm yam. lub teb chaws. Tuam Tshoj cov pov thawj molybdenum hlau reserves ntawm 1.72 lab tons, lub hauv paus reserves ntawm 3.43 lab tons, thib ob tsuas yog nyob rau hauv lub tebchaws United States thiab qeb thib ob nyob rau hauv lub ntiaj teb no.

Molybdenum mines yog concentrated nyob rau hauv plaub lub xeev, xws li Shaanxi, Henan, Jilin thiab Liaoning. Lub ntiaj teb cov hlau khaws cia hauv ntau dua 500,000 tons ntawm molybdenum mines loj heev tag nrho ntawm rau, Tuam Tshoj Henan Luanchuan, Jilin Dashanhei thiab Shaanxi Jinduicheng peb molybdenum mines ntawm daim ntawv teev npe. Cov peev txheej molybdenum nplua nuj, rau Tuam Tshoj txoj kev txhim kho ntawm molybdenum smelting thiab kev ua haujlwm, txhawb nqa kev siv molybdenum, muab cov xwm txheej zoo heev thiab lub hauv paus ruaj khov. Nyob rau hauv xyoo tas los no, Tuam Tshoj lub molybdenum mining, smelting thiab ua tau sai heev. Raws li cov ntaub ntawv, nyob rau hauv 2001, Tuam Tshoj qhov tseeb zus tau tej cov molybdenum concentrate 72, 000 tons, 33, 000 tons ntawm molybdenum oxide, molybdenum hlau 7600 tons, 9500 tons ntawm ntau yam ammonium molybdate, molybdenum strips 1,183 tons, molybdenum slab 1200 tons, molybdenum ntawv 150 tons, molybdenum discs ntau tshaj 40 tons ntawm molybdenum, molybdenum saum lub taub hau thiab lwm yam khoom zoo li tus kwv yees li 50 tons ntawm hluav taws xob lub teeb kev lag luam thiab kev kho tshuab ntawm molybdenum hlau 3.15 billion meters, thiab lwm yam. lubricants, catalyst, pigment thiab lwm yam chemical khoom ntau pua tons. Tsis tas li ntawd xwb, Tuam Tshoj nyob rau hauv lub ntiaj teb no molybdenum kev ua lag luam occupies ib tug pivotal txoj hauj lwm, raws li kev lis kev cai txheeb cais, nyob rau hauv 2001 Tuam Tshoj tus exports ntawm molybdenum ore roasting xuab zeb, molybdate, molybdenum hlau thiab lwm yam molybdenum khoom ntau npaum li 70,274 tons, tsim txawv teb chaws pauv nyiaj li cas rau 26. lab nyiaj daus las. Kev siv cov molybdenum nyob rau hauv daim ntawv ntawm kev lag luam molybdenum trioxide feem ntau suav txog li 70%, ferromolybdenum suav txog li 20%, thiab molybdenum hlau thiab molybdenum cov khoom siv tshuaj txhua tus account rau 5%. Nws daim ntawv thov thaj chaw thiab kev faib faib yog kwv yees li hauv qab no: hlau thiab hlau smelting noj txog li 80% (ntawm uas muaj li ntawm 43% ntawm cov hlau alloy, stainless hlau txog 23%, cov cuab yeej steel thiab high-speed steel li 8%, cam khwb cia hlau thiab rolls txog 6%), cov khoom siv tshuaj txog li 10%, molybdenum hlau cov khoom noj txog li 6%, kub siab-zog alloys thiab tshwj xeeb alloys suav txog li 3%, thiab lwm yam khoom molybdenum txog li 1%. Los ntawm cov saum toj no tuaj yeem pom nyob rau hauv txoj kev loj hlob ntawm cov hlau thiab hlau kev lag luam ntawm kev noj cov molybdenum plays lub luag hauj lwm txiav txim siab, tab sis nrog rau kev loj hlob ntawm science thiab technology, molybdenum nyob rau hauv high-tech thiab lwm yam kev thov yuav txuas ntxiv nthuav thiab tsim. .