Scandium hlau ua li cas?

Scandium hlau ua li cas?
Tom qab tau txais cov ntshiab scandium compound, hloov nws mus rau hauv ScCl3, co-melt nrog KCl thiab LiCl, siv cov zinc molten li cathode rau electrolysis, ces scandium yuav precipitate ntawm zinc electrode, thiab ces evaporate zinc kom tau scandium hlau. .
Lub ntuj tsim lub xeev ntawm scandium: tawg tab sis tsis scarce
Scandium yog ib yam kab mob lithophile dispersed, tab sis nws tsis yog tsawg. Nws qhov kev nplua nuj nyob hauv cov crust yog 22-30ppm (piv txwv li 22-30g/ton, hloov mus rau 35-48g/ton ntawm scandium trioxide), uas siab dua Ag, Au, Pb, Sb, Mo, Hg, W thiab Bi, thiab sib npaug ntawm B, Br, Sn, Ge thiab As.
Hauv qhov xwm txheej, scandium tsis cuam tshuam los ntawm oxidation-txo thiab yog qhov nyuaj rau kev txo qis rau hlau. Nws tsis tshua tsim cov khoom lag luam nplua nuj (cov nyiaj tso cia), tab sis tau nthuav dav hauv ntau yam pob zeb tsim cov zaub mov (tshwj xeeb tshaj yog magnesium thiab hlau silicate) thiab cov khoom lag luam scandium-cov kabmob.
There are more than 800 minerals containing scandium in nature, but few minerals with scandium trioxide content>{{0}} 05 feem pua ​​. Tam sim no, tsuas paub cov zaub mov ywj pheej ntawm scandium yog scandium yttrium ore ((Sc, Y) 2Si2O7, Sc2O3 cov ntsiab lus 33.8 feem pua ​​- 42.3 feem pua), dej scandium phosphate ore (ScPO4.2H2O, Sc2O3 cov ntsiab lus 39.22%) , beryllium scandium (Be3 (Sc, Al) 2Si6O18, Sc2O3 cov ntsiab lus 14.6 feem pua), zirconium scandium yttrium ore (Sc, Zr) 2Si2O7) thiab titanium silicate tsawg kub (Sc (Nb, Ti, Si) 2O5, {18. {35}}.0 feem pua ​​) Nws tsis tshua muaj tshwm sim.
Scandium feem ntau muaj nyob rau hauv cov zaub mov xws li ilmenite, zircon, zircon, bauxite, tsawg lub ntiaj teb ore, titanopyroxene, vanadium-titanium magnetite, tungsten ore, tin ore, uranium ore thiab thee nyob rau hauv daim ntawv ntawm isomorphism. Goldschmidt et al. ntseeg nyob rau xyoo 1930s tias qhov kev nplua nuj ntawm Sc3 ntxiv rau hauv pob zeb thiab cov zaub mov muaj feem cuam tshuam nrog kev hloov isomorphism, tshwj xeeb tshaj yog kev hloov isomorphism ntawm Sc3 ntxiv nrog Fe3 ntxiv, Mg2 ntxiv thiab Al3 ntxiv. Tom qab ntawd, Ringwood tau hais ntxiv tias nws yog qhov tsim ntawm cov pa oxygen lossis hydroxyl complexes, tshwj xeeb tshaj yog kev txhawb nqa ntawm scandium hauv cov pob zeb crystalline thiab dolomites. Qhov zoo sib xws ntawm ionic radius, kev sib koom tes thiab electronegativity ntawm scandium thiab nws cov ntsiab lus cuam tshuam txiav txim siab tias nws tuaj yeem yog isomorphic nrog ntau lwm cov ions.
Cov ntsiab lus ntawm scandium hauv ntau pob zeb yog siab dua li ntawm pyroxenite (muaj 200-300 g/t ntawm scandium trioxide) thiab gabbro (76 g / t). Cov pob zeb hloov pauv metasomatic yog nplua nuj nrog granite pegmatite, tungsten-tin bearing greisenite, albite thiab micitite *, thiab cov bauxite thiab thee kuj muaj scandium siab. Tshwj xeeb, thee tshauv muaj scandium trioxide mus txog 40-600 g/t.
Scandium cov ntsiab lus ntawm cov ore raw (scandium trioxide, g / t) yog raws li nram no: bauxite ore 40-150; Phosphate pob zeb 10-25; tungsten ore 78-337; Vanadium-titanium magnetite 13-40; Fe-Nb tsawg lub ntiaj teb ore 50; Lean manganese ore 181; Ion-type rare earth ore 20-50; Bastnaesite, tantalum niobium ore thiab uranium ore kuj muaj scandium (raws li Lin Hecheng, 2010).
Scandium cov ntsiab lus ntawm concentrate (scandium trioxide, g / t): wolframite ＞ 500; Ilmenite 60; Bauxite 95; Titanium tailings 77; Cassiterite 100 (raws li Lin Hecheng, 2010).
Cov ntsiab lus ntawm scandium extraction raw khoom (scandium trioxide, g/t): 150-600 tungsten slag rau tungsten smelting; 40-150 liab av nkos rau txhuas smelting; Tailings ntawm titanium sib cais 77; 25-100 hydrolysis niam cawv rau titanium dioxide refining; Cov pa luam yeeb thiab hmoov av los ntawm chlorination ntawm high-titanium slag 736 (raws li Lin Hecheng, 2010).
Lub ntiaj teb cov khoom siv scandium yog cov nplua nuj heev, nrog rau kev lag luam cia li ntawm 2 lab tons (xws li scandium hlau, cov txheeb cais tsis tiav). Tuam Tshoj kuj tseem nplua nuj nyob rau hauv scandium cov peev txheej, nrog rau kev lag luam reserves ntawm 650000 tons (raws li cov ntaub ntawv tsis tiav), suav txog 33 feem pua ​​​​ntawm lub ntiaj teb tag nrho cov khoom lag luam.