Common impurities hauv Sodium Fluosilicate & Yuav Ua Li Cas Lawv cuam tshuam rau kev ua haujlwm

Sodium fluorosilicate (Na₂SiF₆) yog cov khoom siv tseem ceeb hauv kev kho dej, kev tsim kho, kev tsim iav, thiab lwm yam kev siv. Txawm li cas los xij, impurities hauv sodium fluosilicate tuaj yeem cuam tshuam rau nws txoj kev ua haujlwm, kev nyab xeeb, thiab ua raws li cov qauv kev lag luam. Rau cov neeg siv khoom lag luam thiab cov neeg xa tawm, kev nkag siab txog cov impurities thiab lawv cov teebmeem yog qhov tseem ceeb rau kev xaiv cov khoom zoo tshaj plaws thiab kev ua haujlwm zoo ntawm daim ntawv thov.

 

Feem ntau cov impurities nyob rau hauv sodium fluorosilicate muaj xws li fluorosilicic acid, sodium fluoride, silica, hnyav hlau ( lead, arsenic, cadmium), thiab chlorides. Cov impurities no feem ntau yog qhia thaum lub sij hawm tsim khoom, uas cuam tshuam nrog neutralizing fluorosilicic acid nrog sodium carbonate los yog sodium hydroxide. Cov theem ntawm impurities nyob ntawm qhov zoo ntawm raw cov ntaub ntawv thiab efficiency ntawm purification txheej txheem.

 

Fluorosilicic acid yog ib qho impurity uas tuaj yeem ua rau acidity ntawm sodium fluorosilicate. Qhov no tuaj yeem muaj teeb meem hauv kev kho dej, vim tias acidity ntau dhau tuaj yeem ua rau cov khoom siv thiab hloov pH ntawm cov dej haus. Hauv kev tsim kho, ntau tshaj fluorosilicic acid tuaj yeem ua kom cov txheej txheem hardening ntawm iav dej, txo lub sijhawm ua haujlwm thiab muaj peev xwm ua kom tsis muaj zog ntawm cov khoom kawg. Sodium fluoride impurities kuj tuaj yeem cuam tshuam rau kev ua haujlwm, vim tias lawv nce cov ntsiab lus fluoride, uas tuaj yeem tshaj li kev tswj hwm hauv kev kho dej.

 

Silica impurities feem ntau tshwm sim raws li cov khoom tsis sib haum, uas tuaj yeem txo cov solubility ntawm sodium fluorosilicate. Qhov no yog qhov teeb meem tshwj xeeb hauv kev kho dej, qhov chaw solubility yog qhov tseem ceeb rau kev siv tshuaj fluoridation. Insoluble silica kuj tuaj yeem ua rau clumping, ua rau cov khoom tsis yooj yim los lis thiab koob tshuaj kom raug. Heavy hlau impurities (lead, arsenic, cadmium) yog ib qho kev txhawj xeeb loj rau kev nyab xeeb, vim tias lawv tuaj yeem paug cov dej haus lossis cov khoom lag luam, ua rau muaj kev pheej hmoo rau kev noj qab haus huv thiab tsis ua raws li cov cai.

 

Chloride impurities tuaj yeem cuam tshuam cov tshuaj lom neeg ruaj khov ntawmsodium fluorosilicate iav, tshwj xeeb tshaj yog nyob rau hauv siab -cov av noo ib puag ncig. Lawv kuj tuaj yeem ua rau corrosion hauv cov khoom siv hlau, txo nws txoj sia thiab nce nqi txij nkawm. Hauv kev tsim cov iav thiab enamel, chloride impurities tuaj yeem ua rau muaj qhov tsis xws luag hauv cov khoom kawg, xws li cov xim tsis zoo los yog txo cov kav ntev.

 

Txhawm rau txo qhov cuam tshuam ntawm impurities, nws yog ib qho tseem ceeb rau cov khoom siv sodium fluosilicate los ntawm cov neeg muab kev ntseeg siab uas siv cov kev tswj xyuas nruj. Kev lag luam -qib sodium fluosilicate yuav tsum muaj qhov purity yam tsawg kawg nkaus ntawm 97%, nrog rau kev txwv nruj ntawm impurities (xws li, cov hlau hnyav tsawg dua lossis sib npaug li 5 ppm, chlorides tsawg dua lossis sib npaug li 0.5%). Thov daim ntawv pov thawj ntawm Kev Ntsuam Xyuas (CoA) los ntawm tus neeg muag khoom tso cai rau cov neeg yuav khoom los txheeb xyuas cov theem impurity thiab xyuas kom ua raws li cov qauv kev lag luam. Los ntawm kev xaiv siab -purity sodium fluorosilicate, cov lag luam tuaj yeem ua kom pom kev ua haujlwm zoo, kev nyab xeeb, thiab ua raws li lawv cov ntawv thov.