Diatomaceous ntiaj teb yog ib hom ntawm siliceous pob zeb feem ntau faib nyob rau hauv lub teb chaws xws li Tuam Tshoj, lub tebchaws United States, Nyiv, Denmark, Fabkis, Romania, thiab lwm yam.Nws cov tshuaj muaj pes tsawg leeg yog SiO2, uas tuaj yeem sawv cev los ntawm SiO2 · nH2O, thiab nws cov ntxhia muaj pes tsawg leeg yog opal thiab nws cov variants.Lub reserves ntawm diatomaceous ntiaj teb nyob rau hauv Tuam Tshoj yog 320 lab tons, nrog rau yav tom ntej cia ntawm ntau tshaj 2 billion tons, feem ntau yog concentrated nyob rau hauv East Tuam Tshoj thiab Northeast Tuam Tshoj.Ntawm lawv, Jilin (54.8%, nrog Linjiang City nyob rau hauv Jilin Province accounting rau thawj pov thawj reserves nyob rau hauv Asia), Zhejiang, Yunnan, Shandong, Sichuan, thiab lwm lub xeev muaj ib tug dav faib, tab sis high-zoo av tsuas yog concentrated nyob rau hauv lub Changbai Roob cheeb tsam ntawm Jilin, thiab feem ntau lwm yam mineral deposits yog qib 3-4 av.Vim muaj cov ntsiab lus impurity siab, Nws tsis tuaj yeem ua ncaj qha thiab siv.Lub ntsiab tseem ceeb ntawm lub ntiaj teb diatomaceous ua tus cab kuj yog SiO2.Piv txwv li, lub active tivthaiv ntawm industrial vanadium catalyst yog V2O5, lub co catalyst yog alkali hlau sulfate, thiab cov cab kuj yog refined diatomaceous ntiaj teb.Cov kev sim tau pom tias SiO2 muaj kev ruaj ntseg ntawm cov khoom nquag thiab nce nrog kev nce ntawm K2O lossis Na2O cov ntsiab lus.Cov kev ua ntawm cov catalyst kuj muaj feem xyuam rau cov dispersion thiab pore qauv ntawm cov cab kuj.Tom qab kev kho cov kua qaub ntawm lub ntiaj teb diatomaceous, cov ntsiab lus ntawm oxide impurities txo qis, cov ntsiab lus ntawm SiO2 nce, thiab thaj chaw tshwj xeeb thiab qhov pore ntim kuj nce.Yog li ntawd, cov txiaj ntsig ntawm lub ntiaj teb refined diatomaceous zoo dua li ntawm lub ntiaj teb diatomaceous.

Diatomaceous ntiaj teb feem ntau yog tsim los ntawm silicate seem tom qab kev tuag ntawm ib leeg-celled algae, feem ntau hu ua diatoms, thiab nws cov ntsiab lus yog aqueous amorphous SiO2.Diatoms tuaj yeem muaj sia nyob hauv dej tshiab thiab dej ntsev, muaj ntau hom.Lawv feem ntau tuaj yeem muab faib ua "central order" diatoms thiab "feathered order" diatoms, thiab txhua qhov kev txiav txim muaj ntau "genera" uas nyuaj heev.

Lub ntsiab tseem ceeb ntawm lub ntiaj teb diatomaceous yog SiO2, nrog cov khoom zoo muaj xim dawb thiab SiO2 cov ntsiab lus feem ntau tshaj 70%.Ib qho diatoms tsis muaj xim thiab pob tshab, thiab cov xim ntawm lub ntiaj teb diatomaceous nyob ntawm cov av nplaum thiab cov organic teeb meem.Cov muaj pes tsawg leeg ntawm lub ntiaj teb diatomaceous los ntawm ntau qhov chaw ntxhia sib txawv.

Diatomaceous ntiaj teb, tseem hu ua diatom, yog fossilized diatom deposit tsim tom qab kev tuag ntawm ib tug celled nroj tsuag thiab ib tug deposition lub sij hawm ntawm txog 10000 mus rau 20000 xyoo.Diatoms yog ib qho ntawm cov kab mob ntxov tshaj plaws uas tshwm sim hauv ntiaj teb, nyob hauv dej hiav txwv lossis dej pas dej.

Hom diatomaceous lub ntiaj teb no yog tsim los ntawm cov deposition ntawm cov seem ntawm ib leeg-celled dej cog diatoms.Qhov kev ua tau zoo ntawm cov diatom no yog tias nws tuaj yeem nqus cov silicon dawb hauv dej los tsim nws cov pob txha.Thaum nws lub neej xaus, nws tso thiab tsim diatomaceous ntiaj teb deposits nyob rau hauv tej yam kev mob geological.Nws muaj qee yam khoom tshwj xeeb, xws li porosity, tsis tshua muaj siab concentration, loj tshwj xeeb thaj chaw, txheeb ze incompressibility, thiab tshuaj stability.Tom qab hloov qhov particle loj faib thiab nto thaj chaw ntawm cov av qub los ntawm processing txheej txheem xws li crushing, sorting, calcination, airflow classification, thiab impurity tshem tawm, nws tuaj yeem tsim nyog rau ntau yam kev lag luam xws li coatings thiab xim additives.