Dab tsi yog cov txheej txheem ua rau tungsten?
Tungsten: extraction thiab ua
Cov txheej txheem niaj hnub ua kom yaj scheelite thiab wolframite concentrates los ntawm alkaline siab digestion, siv cov dej qab zib los yog cov tshuaj concentrated NaOH. Cov tshuaj sodium tungstate tau txais yog purified los ntawm nag lossis daus thiab pom, ua ntej nws hloov mus rau hauv cov tshuaj ammonium tungstate.
Dab tsi yog cov txheej txheem ua rau tungsten?
Tungsten Crucibles