Sodium metasilicate pentahydrate Production
Iindlela zokudityaniswa kwe-sodium metasilicate zibandakanya indlela yokumisa isitshizi, indlela yokunyibilikisa ikristale yokunyibilika, indlela yexesha elinye yegranulation kunye nesisombululo secrystallization.
Inkqubo ye-crystallization ineempawu zotyalo-mali oluncinci lwezixhobo, ixabiso eliphantsi lokuvelisa kunye nomgangatho ozinzile. Inkqubo yokuhamba iboniswa ngolu hlobo lulandelayo
2.1 Impembelelo yekristale yoxinaniso
I-sodium metasilicate pentahydrate ilungiswa ngenkqubo ye-crystallization yesisombululo. Ngokomzobo wesigaba [3], ukuxinwa kwesisombululo sayo se-crystallization (Na2O + SiO2) kufuneka ilawulwe nje ngokuba
I-sodium metasilicate pentahydrate inokuveliswa kuluhlu lwe-25% ~ 28% (iqhekeza lobuninzi). Nangona kunjalo, kukho i-N a2O eyaneleyo kunye ne-SiO 2 kwisisombululo
Inani lichaphazeleka ngokufanayo. Ubuninzi beqhekeza le-8i02 liphezulu, ixesha le-crystallization lide, kwaye i-chain ratio ye-n (Na2O) / n (SiO2) isetyenziswe ngokuthe ngqo yi-1,
Isisombululo esiqulethe i-58% yeqhekeza le-mass crystallized, kwaye imbewu ye-crystal yongezwa. Umjikelo we-crystallization uthatha i-72 ~ 120h; Umxholo ophezulu weNa2O
Isantya sikhawuleza, kodwa isantya esikhawulezayo secrystallization kulula ukubangela amasuntswana acocekileyo ekristale, ngaphezulu kweNa2O eqeqeshelwe ukukhula kwekristale, kwaye imodyuli yemveliso kunzima ukufikelela kuyo.
Ukujonga iimfuno, jonga iTheyibhile 1.
2.2 Isiphumo sembewu
Kwinkqubo ye-crystallization ye-sodium metasilicate, ukwenzela ukulawula umgangatho wekristale kunye nokufumana iimveliso ezinobungakanani obufanayo.
Yongeza imbewu yekristale enobungakanani obufanelekileyo kunye nobungakanani, kwaye ngobunono uvuselele yonke inkqubo ukwenza imbewu yekristale ixhonywe ngokulinganayo kwisisombululo sonke.
Ukunciphisa inani le-nucleation yesibini, ukwenzela ukuba izinto ezibonakalayo zikhule kuphela kumphezulu wembewu yekristale.
Ubungakanani bekristale yembewu eyongeziweyo ixhomekeke kumgangatho, iindidi kunye nobungakanani besuntswana lemveliso enokuthi icwecwe ngexesha lenkqubo yecrystallization kunye nemveliso efunwayo.
Ubunzulu be. Ukucinga ukuba akukho mbewu ephambili ye-nucleating eyenziwa kwinkqubo, inani lamasuntswana kwimveliso egqityiweyo lilingana nenani lamasuntswana embewu eyenziweyo esanda kufakwa.
Mp/KvpLp3=Ms/KvLs3P, emva koko M s=Mp (Ls/Lp) 3
Apho: M s, M p —— umgangatho wembewu yekristale kunye nemveliso egqityiweyo; Ls, Lp -- umyinge wobungakanani besuntswana lembewu yekristale kunye nemveliso egqityiweyo; K v, P acidic acid
Ipropathi eqhubekayo yesodium.
Kwinkqubo ye-crystallization yesisombululo se-sodium metasilicate yamanzi, ngokohlalutyo lwe-crystal phase transition, ngenxa yobubanzi obumxinwa bommandla wayo we-metastable, kulula ukungena.
Kwindawo engazinzanga, imbewu ene-particle ye-0.1-0.2mm yongezwa ngokubanzi. Ukuba umyinge wamasuntswana obungakanani bemveliso egqityiweyo kufuneka ibe yi-1mm Ukuqwalasela into engenakuphepheka
Ubuninzi be-nucleation yesisombululo samahhala ngokwawo yi-40% ~ 60% yeqhekeza elikhulu xa i-0.1 m imbewu yekristale yongezwa ngokwenene.
2.3 Impembelelo yokulawula ubushushu
Inkqubo yecrystallization ye-sodium metasilicate pentahydrate inovelwano kubushushu, kwaye ukukhula kwayo kwekristale kufuneka kudlule kwinkqubo yokungenisa, eyamkelwa phakathi kwe-50-60 ℃
Isixa esipheleleyo se-crystal nuclei silawulwa ngokongeza imbewu ye-crystal kwisisombululo, kwaye i-crystal ikhula kwizinga elifanayo phantsi kweqondo lokushisa eliqhelekileyo kunye ne-supersaturation. Kwinqanaba lamva le-crystallization, pholisa phantsi kwinqanaba le-1 ℃ ngomzuzu ukwenza ikristale ikhule ngokukhawuleza, kwaye yahlule izinto xa ifika kwi-38-48 ℃
2.4 Impembelelo yezinye izongezo
Ukuze kuququzelelwe ukuhlukana kwamanzi akhululekile kunye nekristale ngexesha lokusebenza kokuhlukana, umlinganiselo we-0.005% ~ 0.015% yemali yonke iya kuthathwa i-0.5h ngaphambi kokuphela kokupholisa.
Ukuxinana komphezulu phakathi kwekristale kunye namanzi kunokuncitshiswa ngokongeza i-dodecyl sulfonic acid surfactant kube kanye, enokukhulula isampuli emanzi.
Amanzi ehla ngaphantsi kwe-4% ukuze omiswe kwaye agcinwe
Ixesha lokuposa: Oct-13-2022