Kev ncua - yog dab tsi? Koj yuav kawm tau cov lus teb rau lo lus nug uas tau tshwm sim los ntawm cov ntaub ntawv ntawm kab lus no. Peb kuj yuav qhia rau koj paub txog yuav ua li cas tshem tawm cov kev kho mob rau cov menyuam yaus.
cov ntaub ntawv dav dav
Kev ncua yog cov khoom qhuav uas tsis ua tiav lossis ib nrab yaj hauv cov kua. Nws yog faib nyob rau hauv daim ntawv ntawm me me hais. Hauv tshuaj, xws li cov hmoov diluted yog ib yam tshuaj uas siv los kho ib yam kab mob.
Ntse
Ncua tseg yog ib qho ntxhib-dispersed system uas muaj cov khoom tawg yooj yim thiab cov kua dispersion nruab nrab. Feem ntau, nws cov khoom loj heev (ntau dua 10 microns) uas lawv tuaj yeem yooj yim nyob hauv qab lub ntiajteb txawj nqus (piv txwv li, sediment). Cov kev sib xyaw ua ke uas cov txheej txheem zoo li no ua tau qeeb heev (vim qhov sib txawv me me ntawm qhov ntom ntawm qhov nruab nrab dispersion thiab cov theem dispersed) hu ua suspensions.
Nws yuav tsum tau muab sau tshwj xeeb tshaj yog tias nyob rau hauv concentrated suspensions, dispersed lug tshwm sim heev yooj yim thiab sai. Ntawm no yog ib qho piv txwv ntawm kev raug ncua uas tsis siv tshuaj:
- rig flushingkua;
- enamel xim;
- cement mortars;
- pulp, thiab lwm yam.
Ntxiv rau, cov kev daws teeb meem no feem ntau siv los tsim cov ceramics.
Kev ncua: kev npaj thev naus laus zis
Tam sim no, muaj 2 txoj hauv kev kom tau txais kev ncua: condensation thiab dispersion. Cov tom kawg yog raws li kev sib tsoo ntawm cov tshuaj siv cov cuab yeej siv tshuab, ultrasound, thiab lwm yam. Nws yuav tsum tau muab sau tseg tias thaum tau txais kev ncua los ntawm txoj kev no, cov kws tshaj lij coj mus rau hauv tus account lub degree ntawm hydrophobicity los yog hydrophilicity ntawm lub ntsiab raw khoom uas yog. tau nkag rau hauv kev ncua.
Raws li txoj kev condensation, nws muab rau kev hloov cov kuab tshuaj. Yog li, rau qhov nruab nrab dispersion nyob rau hauv uas cov tshuaj tsis yaj, ib yam khoom yog ntxiv nyob rau hauv ib tug hnyav pre-mixed nrog no nruab nrab.
Tau txais kev kho mob raug ncua hauv cov xwm txheej tsim khoom tuaj yeem ua tiav ntau txoj hauv kev, uas yog:
- kev sib xyaw ua ke thiab tsis tu ncua, uas yog ua los ntawm kev siv cov khoom siv ceev ceev, nrog rau cov tshuab ua pa tawm;
- ultrasonic dispersion siv electrostrictive thiab magnetostrictive emitters;
- sib tsoo cov ntaub ntawv raw hauv cov kua nruab nrab siv cov tshuab colloid;
- txoj kev condensation (feem ntau yog siv hauv khw muag tshuaj).
Tshuaj tua kab mob hauv kev ncua rau menyuam yaus
Vim qhov tseeb tias tsis yog txhua tus menyuam yaus tuaj yeem noj tau tag nrho cov tshuaj, ntau cov tshuaj rau menyuam yaus raug tsim tawm los ntawm kev ncua.
Nyob-rau-siv ncua kev kawm ntawv yog cov kua tshuaj sib tov uas yog siv sab nraud, sab hauv thiab parenterally. Thaum lub sij hawm cia, xws li tshuaj tua kab mob yog tsis ruaj tsis khov. Yog li ntawd, ua ntej siv lawv ncaj qha, lub raj mis nrog cov ntsiab lus yuav tsum tau shaken rau 1 lossis 2 feeb.
Txoj Kev Pabcuam Kev Ncua
Vim li cas cov tshuaj tua kab mob feem ntau raug muab ncua tseg rau cov menyuam yaus thiab dab tsi yog qhov zoo ntawm daim ntawv ntau npaum li ntawd? Koj yuav pom cov lus teb rau cov lus nug hauv qab no:
- Piv rau lwm tus, daim ntawv tshuaj no yog qhov yooj yim tshaj plaws rau menyuam yaus, nrog rau cov neeg mob uas, vim qee lub hom phiaj, tsis tuaj yeem nqos cov tshuaj ntsiav lossis ntsiav tshuaj tag nrho.
- Kev ncua tsis tshua muaj kev mob siab thiab muaj txiaj ntsig zoo dua li cov tshuaj daws teeb meem. Ntxiv mus, daim ntawv tso tawm no ua rau nws yooj yim los kho cov aroma thiab saj ntawm cov tshuaj los ntawm kev ntxiv ntau yam syrups thiab harmless flavors rau nws. Qhov no yog qhov zoo tshaj plaws ntawm kev ncua rau cov menyuam yaus. Tom qab tag nrho, tsis yog ib txwm tus menyuam muaj mob tuaj yeem yuam kom haus cov tshuaj iab thiab tsis qab.
- Cov tshuaj uas tsim tawm hauv daim ntawv ntawm kev ncua yog ruaj khov dua li hauv kev daws. Qhov tseeb no tseem ceeb tshwj xeeb tshaj yog thaum tsim cov tshuaj tua kab mob.
Qhov tsis zoo ntawm kev ncua
Raws li cov kws tshaj lij, qhov tsis zoo ntawm kev tshem tawm tshuaj muaj raws li hauv qab no:
- Lub cev tsis muaj zog ntawm cov tshuaj, uas yog: nag lossis daus (los yog hu ua sedimentation), nce thiab ua ke ntawm qhov ntau thiab tsawg (uas yog, lawv cov aggregation), kev sib txuas ntawm cov kua thiab cov theem khoom (uas yog, condensation). Xws li lub cev phenomena pab txhawb rau lub ascent los yog, conversely, mus rau qhov teeb meem ntawm cov khoom theem. Nyob rau hauv cov ntaub ntawv no, lub hauv paus ntsiab lus ntawm ncua kev kawm ntawv homogeneity yog noticeably ua txhaum.
- Ua ntej siv ncaj qha, qhov kev ncua yuav tsum sib xyaw lossis shaken. Qhov no yog qhov tsim nyog txhawm rau txhawm rau txhim kho lub xeev homogeneous ntawm qhov sib tov.
- Lwm qhov tsis zoo ntawm kev ncua tshuaj yog tias nws muaj lub neej luv luv (txog peb hnub).
Yuav ua li cas?
Yog tias koj lossis koj tus menyuam tau raug tshuaj khomob rau kev kho mob tshwj xeeb, tom qab ntawd ua ntej siv cov hmoov, nws yuav tsum tau diluted kom zoo. Rau qhov no, siv dej los yog lwm yam tshuaj uas kws kho mob tau sau tseg. Yog li, tus nqi ntawm cov kua yuav tsum tau kos rau hauv cov koob txhaj tshuaj, thiab tom qab ntawd ntxiv rau lub vial nrog cov tshuaj qhuav qhuav. Hauv kev xaus, lub thawv yuav tsum tau shaken ceev. Tom qab ntawd, qhov kev ncua yuav siv tau yam xyuam xim rau nws lub hom phiaj.
Nws yuav tsum tau sau tseg tshwj xeeb tias qhov no lossis qhov piv ntawm cov tshuaj hmoov thiab dej yuav tsum txiav txim siab los ntawm tus kws kho mob uas tuaj koom xwb. Tom qab tag nrho, txhua tus neeg siv tshuaj muaj nws tus kheej tshwj xeebconcentration.
