Hardening, nplaum, thiab tsis zoo flowability ntawmtsawg cement refractory castables(LC) yog cov teeb meem tshwm sim thaum tsim kho, feem ntau tshwm sim los ntawm cov hauv qab no:
1. Muaj dej tsis txaus ntxiv
① Cov teeb meem tseem ceeb: Cov dej ntxiv yog qis dua qhov kev pom zoo (feem ntau 6% -8%), cov ntaub ntawv tsis tuaj yeem ntub cov khoom, tsim cov pob "qhuav thiab tawv".
② Kev sib xyaw nyuaj, cov khoom yog xoob thiab lumpy, tsis muaj "nplaum thiab tsis yog-dispersible" cov yam ntxwv, thiab tsis tuaj yeem ntws los ntawm nws tus kheej los yog compacted los ntawm kev co.
③ Kev puas tsuaj: Kev ua dej tsis tiav ntawm cov ntawv khi ua rau txo qis zog, nce porosity, thiab txo qis hauv kev yaig tsis kam.
2. Cov teeb meem cuam tshuam
① Hom Mismatch: Dispersants haum rau qis cement refractory castables systems (xws li polycarboxylate, sodium tripolyphosphate) tsis siv.
② Tsis txaus noj: Cov tshuaj dispersant yog qis dua tus nqi pom zoo (feem ntau yog 0.1%-0.3%), ua tsis tiav cov khoom tawg.
③ Mechanism of Action: Dispersants txo interparticle attraction los ntawm tus nqi repulsion (nce tsis zoo ζ- muaj peev xwm) thiab steric hindrance, ua tau zoo flowability.
3. Tsis tsim nyog Particle Loj Distribution
① Overly Dense Distribution: Kev faib ua feem ntau ntawm cov hmoov zoo (<0.074mm) results in small interparticle gaps, significantly increasing water demand and reducing fluidity.
② Tsis muaj Coarse Aggregate: Tsis txaus cov khoom ntxhib los ua "txhim kho pob txha" ua rau cov hmoov zoo ua ke.
③ Qhov tshwm sim tiag tiag: Cov khoom siv tawv tawv tam sim ntawd thaum nplawm, clumping ua ke thiab ua nyuaj heev rau kev tawg, ua rau kev tsim kho nyuaj heev.
4. Cov xwm txheej ib puag ncig
① Ib puag ncig Kub Kub: Dej nrawm nrawm ntawm qhov kub siab tshaj 30 degree, txo lub sijhawm teeb tsa thiab ua rau "kev teeb tsa sai."
② Ib puag ncig Kub Kub: Kev ywg dej qeeb qeeb ntawm qhov kub qis dua 5 degree, ua rau cov khoom nplaum nrog qeeb zog nce, ua kom lub sijhawm demolding.
③ High Humidity: Ib puag ncig noo noo ua rau ua ntej -hydration, ua rau lub castable poob fluidity ntxov ntxov.
5. Lwm yam tseem ceeb
① Cov teeb meem Binder: Cov khoom tsis zoo lossis cov khoom siv tsis zoo ntawm cov cement / hmoov cuam tshuam rau cov tshuaj tiv thaiv hydration thiab adhesion.
② Kev sib xyaw ua ke: Lub sijhawm sib xyaw tsis txaus (Ntau dua lossis sib npaug li 5 feeb) lossis qhov sib xyaw tsis raug ua rau cov khoom tsis sib xws.
③ Raw Material Contamination: Cov av nkos ntau hauv cov khoom sib xyaw lossis muaj lwm yam impurities ua rau muaj viscosity.
Kev kuaj mob ceev thiab ntsuas ntsuas:
① Tam sim ntawd clumping thiab nyuaj ntws tom qab sib tov: feem ntau yuav ua rau yog dej tsis txaus. Kev daws: Ntxiv dej me me ntau zaus (tsawg dua lossis sib npaug li 0.5% txhua lub sijhawm) thiab rov ua dua.
② Cov dej ntws tsis zoo thiab "cov pob qhuav" ntawm qhov chaw: Qhov feem ntau yuav ua rau tsis txaus dispersant. Kev daws: Ntxiv 0.05%-0.1% kev ua haujlwm siab dispersant (xws li polycarboxylate) thiab remix.
③ Ceev ceev tom qab sib tov: Qhov feem ntau yuav ua rau yog kub ambient kub heev. Kev daws: Sib tov nrog dej khov kom txo qhov kub thiab txias thiab ceev kev tsim kho.
④ Cov khoom nplaum uas tsis muaj zog: Qhov feem ntau yuav ua rau yog tsis tsim nyog gradation. Kev daws: Ntxiv qhov tsim nyog ntawm cov ntxhib sib xyaw (5-10mm) txhawm rau txhim kho particle loj tis.
Lub hauv paus yog vim li cas rau hardening thiab stickiness ntawm tsawg cement refractory castables yog tsis txaus lubrication ntawm hais thiab tsis sib xws ntawm binder. Cov kev daws teeb meem tseem ceeb yog txhawm rau txhim kho cov ntsiab lus ntawm cov dej, hloov cov dispersant, thiab kho cov particle loj tis. Nws raug nquahu kom tswj hwm cov dej hauv cov ntsiab lus nruj me ntsis raws li cov chaw tsim khoom cov lus qhia (6% -8%), siv cov dispersant tshwj xeeb (0.1%-0.3%), thiab sim cov flowability ua ntej kev tsim kho (tus nqi ntws yuav tsum siab dua lossis sib npaug li 180mm) kom ntseeg tau tias kev tsim kho tau zoo.
