Cov gypsum desulfurized yog ib yam khoom ntawm cov txheej txheem desulfurization roj flue ntawm cov chaw tsim hluav taws xob thee lossis lwm cov chaw tsim hluav taws xob uas siv cov roj sulfur. Vim nws tiv taus hluav taws kub, tiv taus cua sov thiab tiv taus dej noo, nws tau siv dav hauv kev lag luam kev tsim kho ua cov khoom siv hauv tsev. Txawm li cas los xij, ib qho ntawm cov teeb meem loj hauv kev siv cov gypsum desulfurized yog nws qhov kub ntawm hydration, uas tuaj yeem ua rau muaj teeb meem xws li tawg thiab deformation thaum lub sijhawm teeb tsa thiab hardening. Yog li ntawd, muaj qhov xav tau los nrhiav cov txheej txheem zoo los txo qhov kub ntawm hydration ntawm desulfurized gypsum thaum tswj hwm nws cov khoom siv kho tshuab thiab cov khoom.
Cellulose ethers yog cov khoom siv ntxiv uas feem ntau siv hauv kev lag luam kev tsim kho kom txhim kho kev ua haujlwm tau zoo, lub zog thiab kev ruaj khov ntawm cov ntaub ntawv ua los ntawm cement. Nws yog ib qho tsis muaj tshuaj lom, biodegradable, polymer rov ua dua tshiab tau los ntawm cellulose, qhov muaj ntau tshaj plaws hauv ntiaj teb cov organic compound. Cellulose ether tuaj yeem tsim cov qauv zoo li gel ruaj khov hauv dej, uas tuaj yeem txhim kho kev khaws cia dej, kev tiv thaiv sag thiab kev sib xws ntawm cov ntaub ntawv ua los ntawm cement. Tsis tas li ntawd, cellulose ethers kuj tseem tuaj yeem cuam tshuam rau cov txheej txheem hydration thiab teeb tsa ntawm cov ntaub ntawv ua los ntawm gypsum, ntxiv rau cuam tshuam rau lawv cov khoom siv kho tshuab thiab cov khoom.
Cov nyhuv ntawm cellulose ether rau gypsum hydration thiab solidification txheej txheem
Gypsum yog ib qho calcium sulfate dihydrate compound uas reacts nrog dej los ua cov calcium sulfate hemihydrate blocks ntom thiab tawv. Cov txheej txheem hydration thiab solidification ntawm gypsum yog complex thiab muaj ntau theem, suav nrog nucleation, kev loj hlob, crystallization, thiab solidification. Qhov pib reaction ntawm gypsum thiab dej tsim ntau qhov kub, hu ua cua sov ntawm hydration. Qhov kub no tuaj yeem ua rau muaj kev ntxhov siab thermal thiab shrinkage hauv cov khoom siv gypsum, uas tuaj yeem ua rau tawg thiab lwm yam tsis zoo.
Cov cellulose ethers tuaj yeem cuam tshuam rau cov txheej txheem hydration thiab teeb tsa ntawm gypsum los ntawm ntau txoj hauv kev. Ua ntej, cellulose ethers tuaj yeem txhim kho kev ua haujlwm thiab kev sib xws ntawm cov ntaub ntawv gypsum los ntawm kev tsim cov khoom sib xyaw ua ke thiab sib xws hauv dej. Qhov no txo cov kev xav tau dej thiab ua rau cov khoom ntws ntau ntxiv, yog li ua rau cov txheej txheem hydration thiab teeb tsa yooj yim dua. Qhov thib ob, cellulose ethers tuaj yeem ntes thiab khaws cov dej noo hauv cov khoom los ntawm kev tsim lub network zoo li gel, yog li ua kom cov khoom muaj peev xwm khaws dej. Qhov no ua rau lub sijhawm hydration ntev dua thiab txo qhov muaj peev xwm rau kev ntxhov siab thermal thiab shrinkage. Qhov thib peb, cellulose ethers tuaj yeem ncua cov theem thaum ntxov ntawm cov txheej txheem hydration los ntawm kev nqus rau ntawm qhov chaw ntawm gypsum crystals thiab inhibiting lawv txoj kev loj hlob thiab crystallization. Qhov no txo qhov pib ntawm cua sov ntawm hydration thiab ncua lub sijhawm teeb tsa. Qhov thib plaub, cellulose ethers tuaj yeem txhim kho cov khoom siv kho tshuab thiab kev ua tau zoo ntawm cov ntaub ntawv gypsum los ntawm kev ua rau lawv lub zog, kev ruaj khov thiab kev tiv thaiv kev hloov pauv.
Cov yam tseem ceeb uas cuam tshuam rau qhov kub ntawm hydration ntawm desulfurized gypsum
Qhov kub ntawm kev ua kom noo ntawm gypsum desulfurized raug cuam tshuam los ntawm ntau yam, suav nrog cov tshuaj lom neeg sib xyaw, qhov loj me ntawm cov khoom me me, cov dej noo, qhov kub thiab cov khoom siv ntxiv rau hauv cov khoom siv. Cov tshuaj lom neeg sib xyaw ntawm gypsum desulfurized yuav txawv nyob ntawm hom roj thiab cov txheej txheem desulfurization siv. Feem ntau hais lus, piv nrog cov gypsum ntuj, gypsum desulfurized muaj cov ntsiab lus ntau dua ntawm cov khoom tsis huv xws li calcium sulfate hemihydrate, calcium carbonate, thiab silica. Qhov no cuam tshuam rau qib ntawm kev ua kom noo thiab qhov kub tsim tawm thaum lub sijhawm ua tshuaj tiv thaiv. Qhov loj me ntawm cov khoom me me thiab thaj chaw tshwj xeeb ntawm gypsum desulfurized kuj tseem yuav cuam tshuam rau qhov nrawm thiab qhov muaj zog ntawm qhov kub ntawm kev ua kom noo. Cov khoom me me thiab thaj chaw tshwj xeeb loj dua tuaj yeem ua rau thaj chaw sib cuag ntau dua thiab pab txhawb kev ua tshuaj tiv thaiv, ua rau muaj cua sov ntawm kev ua kom noo ntau dua. Cov dej thiab qhov kub ntawm cov khoom siv kuj tuaj yeem cuam tshuam rau qhov kub ntawm kev ua kom noo los ntawm kev tswj qhov nrawm thiab qhov dav ntawm kev ua tshuaj tiv thaiv. Cov dej ntau dua thiab qhov kub qis dua tuaj yeem txo qhov nrawm thiab qhov muaj zog ntawm qhov kub ntawm kev ua kom noo, thaum cov dej tsawg dua thiab qhov kub siab dua tuaj yeem ua rau qhov nrawm thiab qhov muaj zog ntawm qhov kub ntawm kev ua kom noo ntau dua. Cov khoom ntxiv xws li cellulose ethers tuaj yeem cuam tshuam rau qhov kub ntawm hydration los ntawm kev sib cuam tshuam nrog gypsum crystals thiab hloov lawv cov khoom thiab tus cwj pwm.
Cov txiaj ntsig zoo ntawm kev siv cellulose ethers los txo qhov kub ntawm hydration ntawm desulfurized gypsum
Peb siv cov cellulose ethers ua cov khoom ntxiv los txo qhov kub ntawm hydration ntawm desulfurized gypsum muaj ntau yam txiaj ntsig, suav nrog:
1. Txhim kho qhov ua haujlwm tau zoo thiab sib xws ntawm cov ntaub ntawv, uas yog qhov zoo rau kev sib tov, kev tso thiab kev npaj cov ntaub ntawv.
2. Txo qhov xav tau dej thiab ua kom cov khoom siv yooj yim dua, uas tuaj yeem txhim kho cov khoom siv kho tshuab thiab kev siv tau ntawm cov khoom siv.
3. Txhim kho cov khoom siv lub peev xwm khaws dej thiab ntev lub sijhawm ntawm cov khoom siv dej, yog li txo qhov kev ntxhov siab thermal thiab shrinkage.
4. Ncua theem pib ntawm kev ua kom dej noo, ncua lub sijhawm khov ntawm cov ntaub ntawv, txo qhov siab tshaj plaws ntawm kev ua kom dej noo, thiab txhim kho kev nyab xeeb thiab zoo ntawm cov ntaub ntawv.
5. Txhim kho cov khoom siv kho tshuab thiab kev ua tau zoo ntawm cov ntaub ntawv, uas tuaj yeem txhim kho qhov ruaj khov, lub zog thiab kev hloov pauv ntawm cov ntaub ntawv.
6. Cellulose ether tsis muaj tshuaj lom, lwj tau thiab rov ua dua tshiab, uas tuaj yeem txo qhov cuam tshuam rau ib puag ncig thiab txhawb kev txhim kho kev lag luam kev tsim kho.
xaus lus
Cov cellulose ethers yog cov khoom ntxiv uas zoo heev uas tuaj yeem cuam tshuam rau cov txheej txheem hydration thiab teeb tsa ntawm gypsum desiccated los ntawm kev txhim kho kev ua haujlwm, kev sib xws, kev khaws dej thiab cov khoom siv kho tshuab ntawm cov khoom siv. Kev sib cuam tshuam ntawm cellulose ethers thiab gypsum crystals tuaj yeem txo qhov kub siab tshaj plaws ntawm hydration thiab ncua lub sijhawm teeb tsa, uas tuaj yeem txhim kho kev nyab xeeb thiab zoo ntawm cov khoom siv. Txawm li cas los xij, qhov ua tau zoo ntawm cellulose ethers yuav nyob ntawm cov yam xws li cov tshuaj lom neeg sib xyaw, qhov loj me ntawm cov khoom me me, cov dej noo, qhov kub thiab cov khoom siv ntxiv siv hauv cov khoom siv. Kev tshawb fawb yav tom ntej yuav tsum tsom mus rau kev ua kom zoo dua qhov ntau thiab tsawg thiab cov qauv ntawm cellulose ethers kom ua tiav qhov kev txo qis ntawm qhov kub ntawm hydration ntawm desulfurized gypsum yam tsis cuam tshuam rau nws cov khoom siv kho tshuab thiab cov khoom. Tsis tas li ntawd, cov txiaj ntsig kev lag luam, ib puag ncig, thiab kev sib raug zoo ntawm kev siv cellulose ethers yuav tsum tau tshawb nrhiav thiab soj ntsuam ntxiv.
Lub sijhawm tshaj tawm: Lub Kaum Hli-11-2023