Calcium Sulfate Dihydrate Tshuaj Formula

Fluoropourogypsum yog ib qho khoom siv los ntawm hydrofluoric acid ntau lawm. Nws yog cov khib nyiab uas muaj calcium sulfate uas tsim los ntawm cov tshuaj tiv thaiv ntawm sulfuric acid thiab fluorite. Nws yog tsuas yog tsim nyob rau hauv inorganic fluoride thiab organic fluoride ntau lawm cov nroj tsuag thiab lwm yam hydrofluoric acid ntau lawm nroj tsuag. Tam sim no, cov khoom tsim tawm txhua xyoo ntawm ntau tshaj 1 lab tons.

Calcium sulfate (CaSO4) muaj cov yam ntxwv ntawm cov txiaj ntsig siab, qib siab thiab qhov ntsuas ruaj khov. Fluorgypsum yog cov pov tseg ntawm hydrofluoric acid uas tsim los ntawm fluorite thiab sulfuric acid CaF2 ntxiv rau H2SO4=CaSO4 ntxiv rau 2HF↑.

Yuav siv tau rau cement retarder, gypsum tsev khoom, pleev xim rau thiab lwm yam. Cov qauv microporous ntawm gypsum thiab nws cov khoom thiab cov cua kub ntawm cov dej, kom lawv muaj suab nrov zoo, rwb thaiv tsev kub thiab hluav taws kub.

Cov tshuaj muaj pes tsawg leeg ntawm fluorogypsum yog (%): CaO 32 ~ 38, SO3 39 ~ 50, SiO2 0.4 ~ 0.6, Al2O{{9} } }. }.5 ~ 6.5; Hlawv poob (400 degree) 3.0 txog 19. Fluoropgypsum yog ib qho tseem ceeb ntawm cov khoom siv raw thiab cov khoom siv hauv tsev. Nws tuaj yeem hloov lub ntuj gypsum raws li tus neeg sawv cev ntawm ntau yam Portland cement, thiab tuaj yeem siv los ua sulfate slag cement thiab mineralizing tus neeg sawv cev, lub tsev blocks, hauv pem teb thiab lub tsev tiav cov ntaub ntawv, slag cib additives, reinforced gypsum fiber ntau hniav board thiab tsev ntawv gypsum board, ceramic. gypsum pwm, thiab lwm yam Fluoropgypsum muaj cov yam ntxwv ntawm cov khoom zoo, tsis tas yuav tawg, yooj yim siv thiab ruaj khov zoo. Nyob rau hauv Tuam Tshoj cement Hoobkas, fluoropoule gypsum yog siv los ua cement retarder es tsis txhob ntawm ntuj gypsum, uas tsis muaj kev cuam tshuam rau cov cement zoo thiab ua kom zoo siv ze li ntawm 100, 000 t ntawm fluoropoule gypsum txhua xyoo. Nyob rau hauv cov txheej txheem ntawm kev cia thiab kev thauj mus los, fluoropgypsum yog ib qho yooj yim los tsim daim hlau thiab harden rau hauv loj pieces tom qab soaked los ntawm dej thiab los nag. Kev ceev faj yuav tsum tau them rau kev tiv thaiv los nag thaum lub sijhawm thauj mus los, thiab nws yuav tsum tau muab cia rau hauv lub tsev rau khoom tom qab nkag mus rau hauv lub hoobkas.

Raws li cov cement ntau npaum li cas hauv cov pob zeb, 5-15 feem pua ​​​​ntawm cov cement yog ntxiv thiab siv nrog cov dej ua kom muaj txiaj ntsig zoo, cov khoom no yuav paub txog qhov tseeb tias cov pob zeb loj heev yuav raug tsim thiab tsis tuaj yeem tsim tawm. tsuas yog los ntawm chav tswj hwm hauv cov hnub nyoog muaj txiaj ntsig.

Nyob rau hauv xyoo tas los no, kev hloov kho cov ntaub ntawv fiber ntau nrog rau cov qoob loo straw tau them nyiaj ntau dua. Nws kuj yog ib txoj hauv kev tseem ceeb los hloov kho fluoropagsum los siv cov nroj tsuag fiber ntau ua tus neeg sawv cev txhawb zog. Cov khoom ntawm fluoropgypsum fiber ntau yog rau qhov zoo. Nyob ntawm lub xeev kev sib txuas lus, cov fiber ntau saum npoo yog kho los ntawm kev kho alkali, hydrothermal txoj kev thiab kev hloov pauv polymer (feem ntau yog siv styrofoam emulsion), uas tuaj yeem ua rau thaj chaw sib cuag ntawm fiber ntau thiab matrix, kom cov fiber ntau thiab matrix interface. kev sib tshuam

Lub zog sib xyaw ua ke yog txhim kho. Tsis tas li ntawd, cov txheej txheem hloov pauv hloov tau tuaj yeem tsim ntawm qhov sib cuam tshuam ntawm cov khoom siv fiber ntau thiab fluoropgypsum matrix. Thaum lub matrix raug rau lub load thiab cov microcracks txuas mus rau lub interface txheej, hloov tau yooj yim interface txheej yuav cuam tshuam lub tawg propagation thiab txhim kho lub flexural zog ntawm cov composite.

Ntawm qhov tod tes, dihydrous gypsum hloov mus rau hauv ib nrab-hydrous gypsum los ntawm lub cev qhuav dej cov tshuaj tiv thaiv thiab txuas ntxiv mus rau lub cev qhuav dej rau hauv anhydrous gypsum (CaSO4). Nyob ntawm cov xwm txheej ntawm cov dej thiab lub cev qhuav dej, xws li qhov kub thiab txias, qhov siab, qhov feem ntawm cov dej, thiab cov impurities qhia, gypsum tuaj yeem tsim ntau yam sib txawv. Cov variants no muaj cov ntsiab lus sib txawv ntawm cov dej crystalline thiab crystal theem xeev.

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