Sodium metasilicate pentahydrate mmepụta usoro
Usoro njikọ nke sodium metasilicate gụnyere usoro ịgbasa ịgba, usoro ịgbaze siri ike crystallization, usoro granulation otu oge na usoro crystallization ngwọta.
The crystallization usoro nwere àgwà nke obere akụrụngwa itinye ego, ala mmepụta ego na mụ mma. A na-egosi usoro nhazi usoro dị ka ndị a
2.1 Mmetụta nke ịta kristal
A na-akwado sodium metasilicate pentahydrate site na usoro crystallization ngwọta. Dị ka eserese usoro [3] si dị, ekwesịrị ịchịkwa ntinye nke ngwọta crystallization ya (Na2O+SiO2) ma ọ bụrụhaala na
Enwere ike imepụta pentahydrate sodium metasilicate na oke nke 25% ~ 28% (irighiri oke). Agbanyeghị, enwere N a2O na SiO 2 zuru oke na ngwọta
Ọnụọgụ a na-emetụta ibe ya. Ọnụ ọgụgụ dị nta nke 8i02 dị elu, oge kristal dị ogologo, na usoro nke n (Na2O) / n (SiO2) ejiri mee ihe bụ 1,
Ngwọta nwere 58% uka akụkụ bụ crystallized, na-agbakwunyere mkpụrụ kristal. The crystallization okirikiri na-ewe 72 ~ 120h; Ọdịnaya dị elu nke Na2O
Ọsọ na-agba ọsọ ọsọ, mana ọsọ kristal na-agba ọsọ na-adị mfe ime ka ụmụ irighiri ihe kristal dị mma, karịa Na2O sitere na uto kristal, na modulus ngwaahịa siri ike iru.
Maka ihe achọrọ, lee Tebụl 1.
2.2 Mmetụta mkpụrụ
Na crystallization usoro nke sodium metasilicate, iji chịkwaa kristal àgwà na-enweta ngwaahịa na edo urughuru size
Tinye mkpụrụ kristal na nha nha na nha nha kwesịrị ekwesị, ma jiri nwayọọ kpalite usoro ahụ dum iji mee ka mkpụrụ osisi kristal kwụsịtụ n'otu n'otu na ngwọta niile.
Belata ọnụọgụ nucleation nke abụọ, nke mere na ihe ahụ kristal na-eto naanị n'elu mkpụrụ kristal.
Ọnụ ọgụgụ nke mkpụrụ kristal agbakwunyere dabere na ịdịmma, ụdị dị iche iche na nha nke ngwaahịa nke enwere ike kristal n'oge usoro kristal niile yana ngwaahịa achọrọ.
The granularity nke. N'iche na ọ dịghị isi mkpụrụ nucleating na-eme na usoro, ọnụ ọgụgụ nke irighiri ihe ndị dị na okokụre ngwaahịa bụ hà ọnụ ọgụgụ nke wuru ọhụrụ agbakwunyere mkpụrụ irighiri ihe.
Mp/KvpLp3=Ms/KvLs3P, emesia M s=Mp (Ls/Lp) 3
Ebe: M s, M p —— àgwà mkpụrụ kristal na ngwaahịa emechara; Ls, Lp —- nkezi urughuru nha nke mkpụrụ kristal na ngwaahịa emechara; K v, P metasilic acid
Anụ ahụ mgbe niile nke sodium.
Maka usoro crystallization nke sodium metasilicate aqueous solution, dị ka nyocha nke mgbanwe usoro kristal, n'ihi obosara dị warara nke mpaghara metastable ya, ọ dị mfe ịbanye.
N'ebe a na-ejighị n'aka, a na-agbakwunye mkpụrụ nwere oke nha nke 0.1-0.2mm. Ọ bụrụ na nkezi urughuru size nke okokụre ngwaahịa a chọrọ ka 1mm Ịtụle na-apụghị izere ezere
Ọnụ ọgụgụ nucleation nke ngwọta n'efu n'onwe ya bụ 40% ~ 60% nke ọnụ ọgụgụ dị nta mgbe 0.1 m kristal na-agbakwunyere n'ezie.
2.3 Mmetụta njikwa okpomọkụ
Usoro crystallization nke sodium metasilicate pentahydrate na-enwe mmetụta maka okpomọkụ, na uto kristal ya kwesịrị ịgafe usoro ntinye, nke a na-anabata n'etiti 50-60 ℃.
A na-achịkwa ngụkọta nke kristal nuclei site n'ịgbakwunye mkpụrụ kristal na ngwọta ahụ, mgbe ahụ, kristal na-etolite n'otu nha n'otu n'otu n'okpuru okpomọkụ na-agbanwe agbanwe. N'oge ikpeazụ nke crystallization, dị jụụ na ọnụego 1 ℃ kwa nkeji iji mee ka kristal na-eto ngwa ngwa, ma kewaa ihe ahụ mgbe ọ ruru 38-48 ℃.
2.4 Mmetụta nke mgbakwunye ndị ọzọ
Iji kwado nkewa nke mmiri na kristal n'efu n'oge ọrụ nkewa, a ga-ewere 0.005% ~ 0.015% nke ngụkọta ego 0.5h tupu njedebe nke jụrụ oyi.
Enwere ike ibelata esemokwu dị n'etiti kristal na mmiri site na ịgbakwunye dodecyl sulfonic acid surfactant otu ugboro, nke nwere ike ịtọhapụ ihe nlele mmiri.
Mmiri na-adaba n'okpuru 4% maka ihicha na nchekwa
Oge nzipu: Ọktoba 13-2022