1 Taw qhia
Tuam Tshoj tau txhawb nqa cov tshuaj khib nyiab ntau dua 20 xyoo. Tshwj xeeb tshaj yog nyob rau hauv xyoo tsis ntev los no, cuam tshuam rau kev tseem ceeb hauv lub teb chaws tseem ceeb rau kev txhim kho cov tshuaj khib thiab cov kev txhawb nqa kom zoo. Tam sim no, muaj ntau tshaj 10 lub xeev thiab cov neeg saib xyuas hauv lub tebchaws uas tau siv npaj ua cug sib xyaw. Ntau tshaj 60%, muaj ntau dua 800 npaj-mixed-mixed-mixed-mixed-stand standris, nrog ib qho kev tsim muaj peev xwm txhua xyoo ntawm 274 lab tons. Xyoo 2021, txhua xyoo kev tsim khoom txhua xyoo ntawm cov kev npaj txhij ua ke-sib xyaw ua ke yog 62.02 lab tons.
Thaum lub sij hawm tsim qauv, lub tshuaj khib feem ntau poob dej ntau dhau thiab tsis muaj sijhawm txaus thiab dej tsis txaus thiab tawg ntawm cov Maas Maste tom qab ua kom tawv nqaij. Cellulose ether yog ib txwm muaj polymer admixture nyob rau hauv cov cug tov tov qhuav. Nws muaj cov haujlwm ua haujlwm hauv dej, thickening, kev rov ua thiab huab cua txhim kho kev ua tau zoo ntawm lub tshuaj khib.
Txhawm rau ua kom cov tshuaj khib ua kom haum rau cov kev thauj mus los thiab daws cov teeb meem ntawm kev tawg thiab qis qhov tseem ceeb rau ntxiv cellulose ether rau cape. Kab lus no kom luv qha qhia cov yam ntxwv ntawm cellulose cov ntaub ntawv, vam tias yuav pab daws cov tshuaj khib nyiab ntawm kev npaj-sib xyaw.
2 Taw qhia rau Cellulose ether
Cellulose ether (cellulose ether) yog tsim los ntawm cellulose los ntawm etherification cov tshuaj tiv thaiv ntawm ib lossis ntau qhov kev sib tsoo thiab kev sib tsoo qhuav.
2.1 Kev faib tawm ntawm cov cellulose neeg muaj kev pab
Raws li cov qauv tshuaj ntawm usehtituents, cov cellulose muaj kev hais ua ke tuaj yeem faib ua anionic, cationic thiab tsis muaj kev ua neej. Ionic cellulose muaj neeg raug hais tsuas yog suav nrog Carboxymethyl cellulose ether (cmc); Cov neeg uas tsis yog-ionic cellulose feem ntau suav nrog methyl cellulose cellulose ether (Holmc) thiab hydroxyethyl fiber ether (HC) thiab lwm yam. Cov tsis tau-ionic tau muab faib ua cov dej-soluble cov neeg muaj kev pab thiab cov roj-soluble. Tsis yog-ionic dej-soluble cov neeg tau txais kev pab yog siv hauv cov tshuaj cug khoom. Nyob rau hauv muaj cov calcium ions, ionic cellulose cellulose muaj kev tsis ruaj khov, yog li lawv tsis tshua muaj siv cov kua txiv hmab txiv ntoo, thiab lwm yam raws li cov ntaub ntawv cementing. Tsis yog-ionic dej-soluble cellulose cellulose cov neeg muaj kev hais ua ke tau siv dav hauv cov ntaub ntawv kev lag luam hauv tsev vim tias lawv cov nyhuv ruaj khov thiab dej khaws cia ruaj khov.
Raws li cov neeg sawv cev sib txawv ethermov, celluleSyl co coolulose, benzyleneyl cellulose, benzyl cellulose, benzyl cellulose, benzyl cellulose, benzyl cellulose, benzyl cellulose, benzyl cellulose, benzyl cellulose, benzyl cellulose, benzyl cellulose, benzyl cellulose cellulose thiab Phenyyl cellulose.
Cellulose Cov neeg muaj kev raug siv nyob rau hauv cov tshuaj khib feem ntau suav nrog methyl cellulose cellulose (Hydrothetyl cellulose (Hydc) ntawm lawv, Hydcc thiab Hemmc thiab Hemc yog qhov feem ntau dav siv.
2.2 Cov tshuaj tshuaj ntawm cellulose ether
Txhua lub cellulose ether muaj cov qauv yooj yim ntawm cellulose-anhydoglucose qauv qauv. Nyob rau hauv cov txheej txheem ntawm kev ua cellulose cellulose cellulose, lub cellulose fiber ntau yog thawj zaug ua kom sov nyob rau hauv ib tug neeg sawv cev alkaline. Cov tshuaj tiv thaiv fibrous yog kev ua kom huv thiab av los ua ib qho hmoov tsis zoo nrog ib qho kev lom zem.
Hauv kev tsim cov MC, tsuas yog methyl chloride yog siv los ua tus neeg sawv cev ntawm tus neeg sawv cev; Ntxiv rau methyl chloride, propylene oxide kuj tseem siv tau los nrhiav hydroxypropyl chaw nyob hauv kev tsim HPMC. Ntau yam kev hais ua cellulose muaj cov nqi methyl thiab hydroxypropyl hloov cov kev cai, uas cuam tshuam rau cov organic sib raug zoo thiab cua sov gel kub ntawm lub cellulose ether.
2.3 Qhov kev sib cais ntawm cov cellulose ether
Kev sib cais ntawm kev sib cais ntawm cellulose ether muaj ib qho muaj txiaj ntsig zoo rau kev ua haujlwm ntawm xis mas cort. Cellulose ether tuaj yeem siv los txhim kho cohesiveness thiab dej cug, tab sis qhov no nyob ntawm lub cellulose kiag li thiab tag nrho cov dej. Cov ntsiab lus tseem ceeb cuam tshuam txog kev sib cais ntawm cellulose ether yog lub sijhawm sib cais, ua kom zoo nkauj thiab hmoov zoo.
2.4 Lub luag haujlwm ntawm Sinking hauv Cement Cug
Raws li ib qho tseem ceeb ntxiv ntawm Maas slurry, rhuav tshem nws cov nyhuv hauv cov hauv qab no.
(1) Txhim kho qhov ua haujlwm ntawm cug tshuaj khib thiab nce viscosity ntawm lub tshuaj khib.
Cov Nplaim Taws Xob Dav Hlau tuaj yeem tiv thaiv cov kab cug los ntawm kev sib cais thiab tau txais ib lub cev sib xyaw thiab lub cev yas ua ke. Piv txwv li, lub rooj muag khoom uas koom nrog HEMC, HPMC, thiab lwm yam, yooj yim rau nyias cov ntaub khib nyiab thiab plastering. , Shear tus nqi, ntsuas kub, ua rau tsaus muag thiab yaj ntsev ntau.
(2) Nws muaj cov pa tawm hauv huab cua.
Vim tias cov pab pawg, kev qhia ntawm cov pab pawg rau hauv cov nplais txo qis ruaj khov, thiab nws yooj yim rau cov kab cug sib xyaw nrog cov txheej txheem sib xyaw. "Ball Efficiency" txhim kho kev tsim kho ntawm lub tshuaj khib, txo cov dej phib ntawm lub cug thiab txo cov thermal conductivity ntawm lub cug. Kev ntsuam xyuas tau qhia tias thaum cov nqi ntawm HEMC thiab HPMC yog 0.5%, cov ntsiab lus roj ntawm lub tshuaj khib nyiab yog qhov loj tshaj plaws, kwv yees li ntawm 55%; Thaum cov nyiaj sib xyaw yog ntau dua 0.5%, cov ntsiab lus ntawm lub cug maj mam tsim tawm mus rau hauv cov txheej txheem roj cov ntsiab lus raws li tus nqi nce.
(3) Khaws nws tsis hloov pauv.
Cov ciab tuaj yeem yaj, muab cov raj pov tseg thiab pab txhawb txoj kev tshuaj khib nyiab ntawm daim nyias nyias thiab cov plastering hmoov. Nws tsis tas yuav raug muab pov tseg ua ntej. Tom qab kev tsim kho, cov khoom siv xis kuj tuaj yeem muaj lub sijhawm ntev ntawm cov dej hiav txwv txuas ntxiv mus txhim kho cov nplaum ntawm lub tshuaj khib thiab txheej.
Kev hloov kho cov teebmeem ntawm cellulose ether rau cov khoom siv ntxhes tshiab cov paj tsib tsuas yog suav nrog cov xaim, dej ua kom huv, huab cua nkag, hloov cua. Nrog rau kev siv thoob plaws ntawm cellulose cov khoom siv hauv cov ntawv txheeb cais, cov kev sib cuam tshuam ntawm cellulose cov neeg muaj kev pab yog maj mam dhau los tshawb nrhiav hotspot.
Lub Sijhawm Post: Dec-16-2021