xov xwm

Diatomite lim pab
Diatomite lim pab muaj cov qauv zoo microporous, kev ua haujlwm adsorption thiab kev ua haujlwm los tiv thaiv compression. Nws tuaj yeem tsis tsuas yog ua rau cov kua lim dej kom tau txais txiaj ntsig zoo, tab sis kuj lim tawm cov khib nyiab zoo, ua kom pom tseeb. Diatomite yog qhov seem ntawm ib leeg celled diatoms thaum ub. Nws cov yam ntxwv: lub teeb yuag, ntxeem tau, siab zog, hnav tsis kam, rwb thaiv tsev, thermal rwb thaiv tsev, adsorption thiab filling, thiab lwm yam.
Diatomite yog qhov seem ntawm ib leeg celled diatoms thaum ub. Nws cov yam ntxwv: lub teeb yuag, ntxeem tau, siab zog, hnav tsis kam, rwb thaiv tsev, thermal rwb thaiv tsev, adsorption thiab filling, thiab lwm yam. Nws muaj tshuaj lom neeg ruaj khov. Nws yog cov khoom siv tseem ceeb rau kev rwb thaiv tsev kub, sib tsoo, pom, adsorption, anticoagulation, demoulding, filling, carrier, thiab lwm yam Nws tuaj yeem siv dav hauv metallurgy, tshuaj lom neeg kev lag luam, hluav taws xob, kev ua liaj ua teb, tshuaj chiv, khoom siv hauv tsev, thermal rwb thaiv tsev khoom thiab lwm yam lag luam. Nws tseem tuaj yeem siv los ua cov khoom siv ua haujlwm rau cov yas, roj hmab, ceramics, ntawv ua, thiab lwm yam.
Qeb Editing
Diatomite lim pab tuaj yeem muab faib ua cov khoom qhuav, calcined khoom thiab flux calcined khoom raws li cov txheej txheem ntau lawm. [1]
① Cov khoom qhuav
Cov purified, pre qhuav thiab crushed silica qhuav av raw cov ntaub ntawv yog qhuav ntawm 600 ~ 800 ° C thiab ces crushed. Cov khoom no muaj ib tug zoo particle loj thiab yog haum rau precision pom. Nws yog feem ntau siv ua ke nrog lwm cov lim pab. Feem ntau ntawm cov khoom qhuav yog lub teeb daj, tab sis kuj yog milky dawb thiab lub teeb grey. [1]
② Calcined khoom
Cov purified, qhuav thiab crushed diatomite raw cov ntaub ntawv yog pub rau hauv lub teb kiln, calcined ntawm 800 ~ 1200 ° C, ces crushed thiab graded kom tau calcined khoom. Piv nrog rau cov khoom qhuav, qhov permeability ntawm cov khoom calcined yog ntau tshaj peb zaug siab dua. Calcined khoom feem ntau yog lub teeb liab. [1]
③ Flux calcined khoom
Cov purified, qhuav thiab crushed diatomite raw khoom yog ntxiv nrog ib tug me me ntawm sodium carbonate, sodium chloride thiab lwm yam melting aids, calcined ntawm 900 ~ 1200 ° C, crushed thiab graded kom tau calcined flux. Lub permeability ntawm flux calcined khoom yog pom tseeb nce, ntau tshaj 20 npaug ntawm cov khoom qhuav. Flux calcined khoom feem ntau yog dawb, thiab lub teeb liab thaum Fe2O3 cov ntsiab lus siab los yog flux ntau npaum li cas me me. [1]
Lim
Cov nyhuv lim dej ntawm diatomite lim pab feem ntau yog ua los ntawm peb txoj haujlwm hauv qab no:
Kev ua si
Qhov no yog ib hom kev lim dej. Thaum cov kua dej ntws los ntawm diatomite, lub pore ntawm diatomite yog me dua li qhov me me ntawm impurity hais, yog li cov impurity hais tsis tuaj yeem hla thiab khaws cia. Cov nyhuv no hu ua kev tshuaj ntsuam. Qhov tseeb, qhov saum npoo ntawm lub ncuav mog qab zib tuaj yeem suav tias yog lub ntsej muag tshuaj ntsuam nrog qhov sib npaug qhov nruab nrab qhov pore loj. Thaum txoj kab uas hla ntawm cov khoom tsis yog tsawg dua (los yog me ntsis tsawg dua) txoj kab uas hla ntawm diatomite pores, cov khoom siv yuav raug "tsim" tawm ntawm qhov raug ncua, ua lub luag haujlwm ntawm qhov pom ntawm qhov chaw. [2]
Cov nyhuv tob
Cov nyhuv tob yog qhov khaws cia ntawm qhov tob pom. Thaum lub sij hawm sib sib zog nqus pom, cov txheej txheem sib cais tsuas yog tshwm sim hauv "sab hauv" ntawm qhov nruab nrab. Qee qhov me me impurity uas dhau los ntawm qhov chaw ntawm lub ncuav mog qab zib lim yog thaiv los ntawm zigzag microporous channels hauv diatomite thiab cov pores zoo dua hauv lub ncuav mog qab zib lim. Xws li hais feem ntau me dua li cov microporous pores ntawm diatomite. Thaum cov khoom tsoo cov phab ntsa ntawm cov channel, nws muaj peev xwm cais tawm ntawm cov kua ntws, tab sis seb nws puas tuaj yeem ua tiav qhov no, Txiav txim siab los ntawm qhov sib npaug ntawm inertia quab yuam thiab tsis kam raug kev txom nyem los ntawm cov khoom, qhov kev cuam tshuam thiab kev tshuaj ntsuam xyuas yog qhov zoo sib xws thiab koom nrog kev ua haujlwm. Lub peev xwm los lim cov khoom muaj feem cuam tshuam nrog cov txheeb ze loj thiab cov duab ntawm cov khoom thiab cov pores. [2]
Adsorption
Adsorption yog txawv kiag li los ntawm saum toj no ob filtering mechanisms. Qhov tseeb, cov nyhuv no tseem tuaj yeem suav tias yog electrokinetic attraction, uas feem ntau yog nyob ntawm cov khoom ntawm cov khoom thiab diatomite nws tus kheej. Thaum cov khoom me me nyob rau hauv lub diatomite sib tsoo nrog rau sab hauv ntawm qhov ntxeem tau diatomite, lawv tau nyiam los ntawm cov nqi sib txawv, los yog cov khoom sib txuas sib txuas thiab ua raws li diatomite, uas belongs rau adsorption. [2] Adsorption yog complex dua thawj ob. Nws yog feem ntau ntseeg tias cov khoom me me tshaj qhov pore txoj kab uas hla yog dais vim yog:
(1) Lub zog intermolecular (tseem hu ua van der Waals attraction) suav nrog kev ua haujlwm tas mus li dipole, induced dipole action thiab transient dipole action;
(2) Lub neej ntawm Zeta muaj peev xwm;
(3) Ion txauv txheej txheem.