Kev ncua yog dabtsi? Txoj kev ntawm kev npaj

Kev ncua yog dabtsi? Lo lus teb rau lo lus nug no yuav raug pom nyob hauv cov ntaub ntawv hauv tsab xov xwm no. Tsis tas li ntawd peb yuav qhia koj txog kev tshem tawm li cas rau kev kho me nyuam yaus.

Cov lus qhia dav dav

Kev ncua yog ib yam khoom uas qhuav tsis thim hauv cov kua hauv lossis tag nrho. Nws yog muab faib rau daim ntawv me me. Hauv cov tshuaj, xws li ib cov tshuaj diluted yog cov tshuaj uas siv los kho cov kab mob.

Nta

Kev ncua yog ib co coherents dispersed muaj txheej txheem dispersed thiab nruab nrab ua kua dispersion. Nws yog feem ntau thiaj li loj hais (ntau dua 10 microns) uas raug ib qho yooj yim los khom nyob rau hauv lub quab yuam ntawm lub ntiajteb txawj nqus (ie sedimented). Cov khoom sib xws uas muaj xws li cov txheej txheem mus qeeb qeeb heev (raws li qhov sib txawv ntawm qhov sib txawv ntawm qhov nruab nrab ntawm qhov nruab nrab thiab cov dispersed theem) raug hu ua kev ncua.

Nws yuav tsum tau qhia tshwj xeeb uas tau sau tseg tias nyob rau hauv cov kev tshem tawm ntau dua cov txheej txheem ua kom pom yooj yim thiab sai. Cia tus piv txwv ntawm cov raug tshem tawm uas tsis siv rau hauv cov tshuaj:

• Drilling dej;
• Cov duab xim txham xim;
• Maas mortars;
• Pulps, lwm yam zoo li

Tsis tas li ntawd, xws li kev daws teeb meem feem ntau yog siv nyob rau hauv qhuav ntawm ceramics.

Tshem Tawm: kev siv technology

Tam sim no, muaj 2 txoj hauv kev tau txais kev ncua ntawv: kev sib xyaw thiab kev faib tawm. Lub tom kawg yog los ntawm kev sib tsoo ntawm cov tshuaj yeeb tshuaj nrog kev pabcuam ntawm cov khoom siv kho tshuab, ultrasound, thiab lwm yam. Nws tseem yuav tsum tau muab sau tseg tias thaum npaj ib ncua kev kawm li no, cov kws kho mob yuav nkag mus rau hauv cov ntaub ntawv ntawm hydrophobicity los yog hydrophilicity ntawm raw raw khoom uas yog nkag tau rau hauv kev ncua.

Xws li txoj kev ntsuam xyuas, nws muab kev hloov ntawm qhov hnyav. Yog li, ib cov tshuaj ntxiv rau cov dispersion nruab nrab uas cov tshuaj tsis yaj, nyob rau hauv ib qho solvent premixed nrog no medium.

Kev tsim tawm kev kho mob raws li cov cai ntawm kev tsim muaj peev xwm ua tau nyob rau hauv ntau txoj kev sib txawv, xws li:

• Cov khoom siv khov kho thiab txhua zaus, uas yog nqa nrog kev pab ntawm cov kev kub ceev ceev, thiab cov khoom siv rau cov khoom siv rotary-pulsating;
• Ultrasonic dispersion siv electrostrictive thiab magnetostrictive radiators;
• Sib tsoo cov khoom ua tau zoo hauv cov kua nruab nrab nrog kev pab los ntawm colloidal mills;
• Cov kab mob hnyav (feem ntau yog siv tshuaj ua haujlwm).

Tshuaj tua kab mob rau cov menyuam yaus

Saib ntawm qhov tseeb tias tsis yog txhua tus me nyuam tuaj yeem noj tshuaj tag nrho, ntau cov khoom noj rau cov me nyuam tau ua tiav raws li kev ncua.

Npaj txhij mus-siv-muab-siv-muab-tso-siv-siv-kua-kua sib tov uas siv rau sab nraud, sab hauv thiab sab hauv. Thaum muab, xws li tshuaj yeeb siv tshuaj tua kab mob tsis txaus ntseeg. Tias yog vim li cas ua ntej lawv siv tam sim ntawd, cov vials nrog cov txheem yuav tsum tau shaken rau 1 lossis 2 feeb.

Qhov zoo ntawm kev ncua

Vim li cas cov tshuaj tua kab mob feem ntau tau muab tso rau hauv kev ncua kev kawm rau menyuam yaus thiab cov txiaj ntsim zoo li cas ntawm daim ntawv noj tshuaj no ua ntej lwm tus? Lo lus teb rau lo lus nug koj nug nram qab no:

• Muab piv rau lwm tus, xws li kev siv ntau npaum li cas yog qhov yooj yim rau tus me nyuam, thiab cov neeg mob, vim tias tsis muaj lub hom phiaj, tsis tuaj yeem nqos cov tshuaj ntsev lossis tshuaj ntsiav tshuaj.
• Tshem Tawm Tsam muaj tsawg zog thiab nplua nuj saj dua cov pa tshuaj. Tsis tas li, daim ntawv no tso cai rau koj yooj yim kho qhov tsw thiab saj ntawm cov tshuaj los ntawm kev ntxiv ntau cov phoov thiab tsis phom sij rau nws. Qhov no yog qhov zoo tshaj plaws ntawm kev ncua ntawm menyuam yaus. Tom qab tag nrho, tsis yog ib tus me nyuam mob tuaj yeem ua rau haus ib qho iab thiab ntsim tshuaj.
• Cov tshuaj uas muab tso rau hauv daim ntawv txwv tsis pub tuaj yeem tshaj qhov teeb meem. Qhov tseeb no tseem ceeb heev thaum lub sij hawm tsim cov tshuaj tua kab mob.

Qhov tsis zoo ntawm kev ncua

Raws li kws txawj, qhov tsis zoo ntawm kev tshem tawm cov tshuaj muaj xws li nram qab no:

• Lub cev tsis muaj zog ntawm kev npaj, uas yog: los nag (los yog hu ua sedimentation), nce thiab aggregation ntawm qhov ntau thiab tsawg (xws li, aggregation thereof), cov kua thiab cov khoom sib koom ua ke (ie, condensation). Tej lub cev phenomena pab surfacing los yog conversely, lub deposition ntawm cov khib nyiab. Nyob rau tib lub sij hawm, txoj cai ntawm uniformity ntawm tshem tawm teeb meem yog ua txhaum.
• Ua ntej siv ncaj qha, txoj kev raug ncua yuav tsum muab sib xyaw los yog sib zog. Qhov no yog qhov tsim nyog thiaj li yuav rov qab muaj homogeneous lub xeev ntawm qhov sib tov.
• Lwm qhov teebmeem ntawm kev raug tshem tawm yeeb tshuaj yog tias nws muaj lub neej txaj luv luv (li peb hnub).

Yuav ua li cas yug?

Yog tias koj lossis koj tus menyuam tau raug tshuaj kom raug tshem tawm yeeb tshuaj rau kev kho mob ntawm tus kab mob, tom qab ntawd ua ntej yuav siv cov hmoov av, nws yuav tsum muab lwg kom zoo. Rau qhov no, dej los yog qee qhov tshuaj uas tau hais los ntawm tus kws kho mob. Yog li, hauv cov koob txhaj tshuaj yuav tsum tau ntaus cov kua dej kom txaus, thiab ntxiv rau lub raj mis nrog tshuaj yeeb dej caw. Thaum kawg, lub khob yuav tsum tau txhaws kom zoo. Tom qab ntawd, qhov kev rau txim tshem tawm tuaj yeem siv tau rau nws lub hom phiaj.

Nws yuav tsum raug tshwj xeeb tshaj tawm hais tias qhov no los yog qhov sib piv ntawm cov hmoov tshuaj thiab dej yuav tsum tau txiav txim siab tsuas yog los ntawm tus kws kho mob. Tom qab tag nrho, txhua tus neeg siv yeeb tshuaj nws muaj nws tus kheej tshwj xeeb.