Txoj Kev Smelting ntawm Tantalum
Tantalum-niobium ore feem ntau nrog ntau yam hlau. Cov kauj ruam tseem ceeb ntawm tantalum smelting yog kom decompose cov concentrate, purify thiab cais tantalum thiab niobium, npaj ntshiab tebchaw ntawm tantalum thiab niobium, thiab thaum kawg los npaj hlau.
Ores tuaj yeem decomposed los ntawm hydrofluoric acid decomposition method, sodium hydroxide melting method thiab chlorination method. Tantalum thiab niobium tuaj yeem sib cais los ntawm cov kuab tshuaj rho tawm (cov khoom siv feem ntau yog methyl isobutyl ketone (MIBK), tributyl phosphate (TBP), sec-octanol thiab acetamide, thiab lwm yam.], fractional crystallization thiab ion txauv.
Kev sib cais: Ua ntej, cov ntsiab lus ntawm tantalum-niobite yog decomposed nrog hydrofluoric acid thiab sulfuric acid los tsim tantalum thiab niobium rau hauv fluorotantalic acid thiab fluoroniobium acid, uas yog yaj nyob rau hauv leaching tov. Nyob rau hauv lub leachate, ib tug muaj zog acid tov nrog complex muaj pes tsawg leeg yog tsim. Lub tantalum thiab niobium leaching tov yog muab rho tawm nrog methyl isobutyl ketone kom rho tawm tantalum thiab niobium mus rau cov organic theem nyob rau tib lub sij hawm, thiab cov kab impurities nyob rau hauv cov organic theem yog ntxuav nrog sulfuric acid tov kom tau ib tug ntshiab organic theem ntxuav cov kua uas muaj tantalum. thiab niobium, thiab cov raffinate yog ua ke, uas muaj Trace npaum li cas ntawm tantalum, niobium thiab impurity ntsiab yog muaj zog acid daws thiab muaj peev xwm rov qab zoo. Cov ntshiab tantalum-niobium-muaj cov organic theem yog stripped ntawm niobium nrog ib tug dilute sulfuric acid tov kom tau ib tug tantalum-muaj organic theem. Niobium thiab ib qho me me ntawm tantalum nkag mus rau theem aqueous thiab tom qab ntawd rho tawm cov tantalum nrog methyl isobutyl ketone kom tau txais cov tshuaj ntshiab niobium. Cov ntshiab tantalum-muaj cov organic theem yog rov qab-extracted nrog dej kom tau ib tug ntshiab tantalum-muaj kua. Cov theem ntawm cov organic tom qab stripping lub tantalum yog rov qab mus rau lub extraction thiab recycled. Pure fluorotantalic acid tov los yog ntshiab fluoroniobium acid daws react nrog poov tshuaj fluoride los yog poov tshuaj chloride los tsim poov tshuaj fluorotantalate (K₂TaF₇) thiab potassium fluoroniobate (K₂NbF₇) muaju, thiab kuj tuaj yeem ua rau ammonium hydroxide los tsim hydrogen Tantalum hydroxide. Lub hydroxide ntawm tantalum los yog niobium yog calcined ntawm 900 ~ 1000 degree los tsim oxide ntawm tantalum los yog niobium.