Inqubo yokukhiqiza ye-Sodium metasilicate pentahydrate

Sodium metasilicate pentahydrate

Izindlela zokuhlanganisa ze-sodium metasilicate zifaka indlela yokumisa isifutho, indlela yokuncibilikisa ikristalu yokuncibilika, indlela yesikhathi esisodwa ye-granulation kanye nendlela ye-crystallization yesisombululo.

Inqubo ye-crystallization inezici zokutshalwa kwezimali okuncane, izindleko eziphansi zokukhiqiza kanye nekhwalithi ezinzile. Ukugeleza kwenqubo kuboniswa kanje

Inqubo yokukhiqiza ye-Sodium metasilicate pentahydrate

2.1 Umthelela wokugxilisa ikristalu

I-sodium metasilicate pentahydrate ilungiswa ngenqubo ye-crystallization yesisombululo. Ngokusho komdwebo wesigaba [3], ukugxila kwesixazululo sayo se-crystallization (Na2O+SiO2) kufanele kulawulwe inqobo nje uma

I-sodium metasilicate pentahydrate ingakhiqizwa ebangeni lama-25% ~ 28% (ingxenyana yobuningi). Nokho, kukhona i-N a2O eyanele ne-SiO 2 esixazululweni

Inombolo ithinteka ngokulinganayo. Ingxenye enkulu ye-8i02 iphakeme, isikhathi se-crystallization side, futhi isilinganiso se-chain ye-n (Na2O) / n (SiO2) esetshenziswe ngokuqondile yi-1,

Isixazululo esiqukethe i-58% mass fraction is crystallized, futhi imbewu yekristalu iyengezwa. Umjikelezo we-crystallization uthatha i-72 ~ 120h; Inani eliphakeme kakhulu lama-Na2O

Ijubane liyashesha, kodwa isivinini esisheshayo se-crystallization kulula ukubangela izinhlayiya zekristalu enhle, i-Na2O eyengeziwe ehlanganiswe ukukhula kwekristalu, futhi i-modulus yomkhiqizo kunzima ukuyifinyelela.

Ukuze uthole izidingo, bheka Ithebula 1.

isikhathi se-crystallization

2.2 Umphumela wembewu

Enqubweni ye-crystallization ye-sodium metasilicate, ukuze ulawule ikhwalithi yekristalu futhi uthole imikhiqizo enosayizi wezinhlayiyana ezifanayo.

Engeza imbewu yekristalu enosayizi wezinhlayiyana ezifanele kanye nenani, bese ugoqa ngobumnene yonke inqubo ukuze wenze imbewu yekristalu imiswe ngokulinganayo kuso sonke isixazululo.

Yehlisa inani le-nucleation yesibili, ukuze izinto ezicwebezelayo zikhule kuphela phezu kwembewu yekristalu.

Inani lekristalu yembewu elengeziwe lincike kwikhwalithi, ukuhlukahluka kanye nosayizi wezinhlayiyana zomkhiqizo ongacwebezeliswa phakathi nayo yonke inqubo ye-crystallization kanye nomkhiqizo oyifunayo.

Imbudumbudu ye. Uma sicabanga ukuthi ayikho imbewu eyinhloko ekhiqiza i-nucleating kule nqubo, inani lezinhlayiya zomkhiqizo oqediwe lilingana nenani lezinhlayiya zembewu yokwenziwa esanda kufakwa.

Mp/KvpLp3=Ms/KvLs3P, bese kuba ngu-M s=Mp (Ls/Lp) 3

Kuphi: M s, M p —— ikhwalithi yembewu yekristalu nomkhiqizo oqediwe; Ls, Lp —- isilinganiso sosayizi wezinhlayiyana zezinhlayiyana zekristalu nomkhiqizo oqediwe; I-K v, i-P ye-metasilicic acid

Impahla engokomzimba njalo ye-sodium.

Ngenqubo ye-crystallization yesisombululo samanzi se-sodium metasilicate, ngokusho kokuhlaziywa kwe-crystal phase transition, ngenxa yobubanzi obuncane bendawo yayo ye-metastable, kulula ukungena.

Endaweni engazinzile, imbewu enosayizi wezinhlayiyana ongu-0.1-0.2mm ngokuvamile iyengezwa. Uma isilinganiso sikasayizi wezinhlayiyana zomkhiqizo oqediwe kudingeka ukuthi ube ngu-1mm Ngokucabangela okungenakugwenywa

Inani lenucleation lesixazululo samahhala ngokwalo lingu-40% ~60% wengxenye enkulu lapho imbewu yekristalu engu-0.1 m empeleni yengezwa.

2.3 Ithonya lokulawula izinga lokushisa

Inqubo ye-crystallization ye-sodium metasilicate pentahydrate izwela izinga lokushisa, futhi ukukhula kwayo kwekristalu kudinga ukudlula inqubo yokungeniswa, eyamukelwa phakathi kuka-50-60 ℃.

Inani eliphelele le-crystal nuclei lilawulwa ngokungeza imbewu ye-crystal esixazululweni, bese i-crystal ikhula ngezinga elifanayo ngaphansi kwezinga lokushisa elilinganayo kanye ne-supersaturation. Esigabeni sakamuva se-crystallization, zipholisa ngesilinganiso esingu-1 ℃ ngomzuzu ukuze wenze ikristalu ikhule ngokushesha, futhi uhlukanise okokusebenza lapho ifinyelela ku-38-48 ℃.

2.4 Umthelela wezinye izithasiselo

Ukuze kube lula ukuhlukaniswa kwamanzi amahhala kanye nekristalu ngesikhathi sokusebenza kokuhlukanisa, isilinganiso se-0.005% ~ 0.015% yenani eliphelele lizothathwa 0.5h ngaphambi kokuphela kokupholisa.

Ukungezwani okungaphezulu phakathi kwekristalu namanzi kungancishiswa ngokungeza i-dodecyl sulfonic acid surfactant kanye, engakhulula isampula elimanzi

Amanzi ehla ngaphansi kuka-4% ukuze omiswe futhi agcinwe


Isikhathi sokuthumela: Oct-13-2022
WhatsApp Online Chat!