Tuam Tshoj Gypsum Joint Cement

Fluorgypsum yog cov khib nyiab ntawm hydrofluoric acid uas tsim los ntawm fluorite thiab sulfuric acid CaF2 ntxiv rau H2SO4=CaSO4 ntxiv rau 2HF↑.

Thaum cov fluorine gypsum tawm ntawm lub reactor, cov khoom kub yog 180 ~ 230 degree, cov pa kub yog 800 ~ 1000 degree, cov gypsum tso tawm yog anhydrous calcium sulfate, belongs rau ⅡCaSO4. Thaum pib ntawm lub qhov cub, fluoropgypsum muaj cov fluorite thiab sulfuric acid residual, thiab cov ntsiab lus ntawm fluorine thiab sulfuric acid nyob rau hauv cov tshuaj leaching yog kuj siab, uas tshaj qhov txwv ntawm "Hazardous Waste Identification Standard", thiab ib puag ncig tiv thaiv department yuav tsum tau. tias nws yuav tsum tsis txhob muab tso rau hauv ib pawg. Vim li no, Suav cov tuam txhab hydrogen fluoride feem ntau siv cov kua qaub nruab nrab txoj kev, uas txhais tau hais tias cov gypsum tshiab tshiab tau ntxiv rau cov txiv qaub hmoov kom tsis muaj zog thaum PH=7 lossis li ntawd. Cov txiv qaub ntxiv rau neutralize sulfuric acid thiab tsim calcium sulfate. Lub purity ntawm fluoropgypsum tso tawm tuaj yeem ncav cuag 80% ~ 90 feem pua.

Fresh fluoride gypsum belongs rau hom Ⅱ anhydrous gypsum, thiab nws cov hydration mechanism thiab hydration dej zoo ib yam. Nws yog insoluble los yog insoluble anhydrous gypsum thiab muaj peev xwm hydration kev ua si, tab sis nws hydration tus nqi qeeb, uas yog "lub caj dab" ntawm txoj kev loj hlob thiab kev siv.

Hydrated fluoropgypsum yog cov khoom siv hluav taws kub zoo: Fluoropgypsum dihydrate muaj 20.9 feem pua ​​​​cov dej crystallized, ntxiv rau 8 feem pua ​​​​ntawm cov dej dawb hauv cov qauv, thiab nws cov ntsiab lus dej tag nrho yog li 30 feem pua. Nws yog cov khoom siv tsis muaj dej tsis zoo hauv qib A zoo. Fluoride gypsum tom qab hydration yog cov khoom siv rwb thaiv tsev zoo: dihydrous fluoropgypsum muaj cov thermal conductivity tsawg, feem ntau ntawm 1.5 ~ 1.9w / (m•k), yog cov khoom siv thermal rwb thaiv tsev zoo. Qhov ntom ntawm fluoropgypsum hardening lub cev feem ntau yog 10 feem pua ​​-15 feem pua ​​​​siab dua li ntawm lwm cov gypsum hardening lub cev, thiab kev kho mob yog xav tau los txo qhov ceev. Cov khoom siv kho mob thiab cov tshuaj mos muag ntawm fluoropgypsum hardening lub cev zoo dua li lwm cov gypsum hardening lub cev.

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