Molybdenum Assay Technology

Molybdenum Ore Assay: Molybdenum tuaj yeem txiav txim siab los ntawm txoj kev gravimetric, volumetric method, colorimetric method, polarographic method, atomic absorption spectrophotometry, X-ray spectrometry thiab spectroscopic method. Raws li cov ntsiab lus ntawm molybdenum nyob rau hauv cov ore feem ntau tsawg, txoj kev colorimetric yog siv los txiav txim cov catalytic polarographic txoj kev kuj siv. Feem ntau siv yog thiocyanate colorimetric txoj kev, uas yog, nyob rau hauv acidic tov yuav molybdenum (Ⅵ) txo rau molybdenum (Ⅴ), molybdenum (Ⅴ) thiab thiocyanate los ua ib tug txiv kab ntxwv-liab complex rau colorimetric. Yuav ua tau nyob rau hauv nitric acid los yog sulfuric acid tov, nrog rau cov coj tsis muaj zog txo tus neeg sawv cev xws li stannous chloride, thiourea txo. Txoj kev no yog qhov yooj yim, ceev ceev, ob peb cuam tshuam cov ntsiab lus, zoo stability thiab siab raug. Cov ntsiab lus siab dua ntawm molybdenum tuaj yeem siv cov txheej txheem photometric sib txawv, cov lej ntawm molybdenum kuj tuaj yeem siv ethyl acetate thiab lwm yam kev rho tawm colorimetric.

Txhawm rau txiav txim siab cov ntsiab lus siab ntawm molybdenum (molybdenum concentrate), txoj kev hnyav thiab txoj kev ntim tuaj yeem siv. Txoj kev Gravimetric suav nrog txoj kev ua cov hmoov lead molybdate, benzoin oxime txoj kev thiab 8- txoj kev hydroxyquinoline. Ntawm lawv, txoj kev siv lead ua molybdate muaj kev cuam tshuam ntau dua thiab cov txheej txheem nyuaj, tab sis cov acidity ntau yog dav thaum nag lossis daus, thiab cov ntsiab lus ntawm cov hlau lead molybdate yog qhov ruaj khov, yog li qhov tseeb yog siab, thiab feem ntau yog siv hauv kev tsim khoom. Txoj kev benzoin oxime muaj tsawg cuam tshuam cov ntsiab lus, tab sis cov ntsiab lus ntawm precipitated lead yog ruaj khov, yog li qhov tseeb yog siab thiab nws yog feem ntau siv hauv kev tsim khoom.