Ion txauv txoj kev rau silica sol precision casting.Cov cation txauv resin siv muaj zog acid styrene cation txauv resin;anion pauv tsob ntoo hais txog qhov tsis muaj zog styrene anion txauv resin.

Kev sib pauv ion yog ib qho kev sib npaug.Cov txheej txheem ntawm cov tshuaj tiv thaiv yog tias thaum cov tshuaj silicic acid uas muaj Na + tau dhau los ntawm kev sib pauv ntoo ntiv tes, Ma + hloov H + ntawm cation txauv resin.Yog li ntawd, NAa + nyob rau hauv lub khob dej tau raug tshem tawm, thiab H + cations, silicon ions thiab SiO3 nyob rau hauv sodium silicate tsim ib tug active dilute tov ntawm silica sol thiab ntws tawm.

Kev sib pauv ion zoo ntawm silica sol muaj feem xyuam rau cov hauv qab no: qib ntawm resin regeneration, sib npaug zog, resin qhov siab, inflow qhov tob, ion loj, thiab lwm yam. Cov silica sol dhau los ntawm cov cation txauv kem yog diluted thiab ces dhau los ntawm weakly. yooj yim anion resin pauv kem kom tshem tawm cov anion CL- hauv cov kua kom ua tiav lub xeev ruaj khov.Lub dilute silicon sib sib zog nqus cov pos hniav ntws tawm ntawm qhov sib pauv kem muaj ib tug tsawg concentration thiab yuav tsum tau concentrated.Yuav kom tiv thaiv gelation thaum lub sij hawm concentration, ib tug stabilizer yuav tsum tau ntxiv sai sai ua ntej concentration.Lub stabilizer feem ntau yog MOH (M yog L, Na, K, Rb, Cs, NH4.NH2, thiab lwm yam).Tus nqi ntawm stabilizer yuav tsum tsim nyog.Yog tias nws tsawg dua 1% ntawm cov moles ntawm SiO2, nws nyuaj rau ua lub luag haujlwm ruaj khov;yog tias nws tshaj 5% Nws yuav txo qhov purity ntawm cov khoom.Siv 5kg ntawm silica sol saum toj no thiab kho tus nqi PH rau 78 nrog 10% NAOH tov.Noj 900 g ntawm kev hloov pauv kua thiab sau nws mus rau hauv lub siab reducer kom ua tiav cov concentration hauv qab qhov siab.Thiab ntawm lub hauv paus ntsiab lus ntawm kev ua kom cov kua theem nyob rau hauv lub thawv tas li, maj mam ntxiv cov ntxiv 4100g ntawm cov kua hloov.Qhov ntsuas kub tau khaws cia ntawm 78 ° C, thiab 900 g ntawm silica sol uas muaj SiO220% thiab Na200.33% PH ntawm 9.6 tau npaj, thiab qhov nruab nrab particle loj yog kwv yees li 16 mum.

Cov ion txauv resin tau poob nws cov peev txheej pauv tom qab ion pauv.Yuav tsum tau ntxuav nrog dilute hydrochloric acid thiab hloov Na + ntawm cov resin nrog H9 + hauv HCL.Cov pab pawg nquag ntawm cov ion txauv resin yog oxidized los tsim cov resin thiab rov ua kom muaj peev xwm pauv tau.Tom qab rov tsim dua tshiab, tsob ntoo pauv ion txhais tau hais tias nws yuav tsum tau muab yaug nrog dej distilled mus rau qhov teev PH nqi rau kev siv tom ntej.

Kev ua tau zoo ntawm silica sol: SiO2 cov ntsiab lus 20% 30% (H2SiO3 cov ntsiab lus> 26%) noo noo 70% 80% cov ntsiab lus tshwj xeeb 1.141.21 Na2O cov ntsiab lus 0.4% 0.5% viscosity (txheej 4) 10.9S tuaj yeem khaws cia rau ib xyoos