Ijeli ye-silica luhlobo lwemathiriyeli ye-adsorption esebenzayo kakhulu.
Yinto e-amorphous kunye ne-chemical formula yayo yi-mSiO2.nH2O. Idibana nomgangatho weekhemikhali zaseTshayina HG/T2765-2005. Yimpahla eluhlaza ye-desiccant evunywe yi-FDA enokuthi idibane ngqo nokutya kunye neziyobisi. Ijeli ye-silica inekhono elinamandla le-hygroscopic, ukusebenza kwe-adsorption eyomeleleyo, nokuba i-silica gel desiccant ifakwe ngokupheleleyo emanzini, ayiyi kuthambisa okanye ikhuphe. Ineempawu ezingezizo ezinobuthi, ezingenancasa, ezingonakalisiyo nezingangcolisi, ngoko ke inokunxibelelana ngqo nayo nayiphi na into. Izinto ezibonakalayo ezifunekayo ukulungiselela ukuveliswa kwe-silica gel zi: i-sodium silicate (i-paucine, iglasi yamanzi), i-asidi ye-sulfuric.
Okokuqala, i-alkali kunye ne-asidi zilungiswe kwangaphambili, kwaye emva koko i-silicate yesodium eqinileyo iyanyibilika kubushushu obuphezulu kwaye ihluzwe ukulungiselela uxinaniso oluthile lolwelo, kwaye i-asidi yesulfuric ilungiswa kuxinaniso oluthile lolwelo, ukuxinwa kwesulfuric. iasidi yi-20%.
Okwesibini, inyathelo lesibini kukwenza iglu (i-gel granulation), eli nyathelo lelona libaluleke kakhulu, isisombululo se-bubble yangaphambili kunye ne-sulfuric acid isisombululo phantsi kweemeko ezithile, ukuze kwenziwe isisombululo sejel enyibilikayo, emva kokufikelela kugxininiso olufanelekileyo ibe ngamasuntswana ejeli. Ubume kunye nobukhulu bamaqhekeza bunokugqitywa ngokupheleleyo ngokweemfuno zomsebenzisi kunye nomthamo wemveliso. Indlela eqhelekileyo ye-gel granulation yi-air granulation, kunye ne-acid-base ratio, i-concentration, iqondo lokushisa kunye nexesha le-gel granulation elisetyenziswe kwinkqubo ye-gel granulation yimilinganiselo ethile yezobuchwepheshe.
Okwesithathu, ijeli yokuguga idinga ukuhamba ngexesha elithile kunye nobushushu, kunye nexabiso le-PH ukuya kwiminyaka yobudala, ukwenza i-gel skeleton ibe namandla, i-glue condensation phakathi kwamaqhekeza ngexesha lokuguga ukwenza iibhondi ze-Si-O-Si, ziphucule. amandla e-skeleton, iinqununu zisondele komnye nomnye, zinciphisa indawo kwisakhiwo segridi, kwaye amanzi aqulethwe kuyo acinywe.
I-Pickling, ukuhlamba, ukuhlamba iglu I-Pickling, ukuhlamba, ukuhlamba iglue kuyinyathelo elibaluleke kakhulu kwinkqubo, kuba i-Na2SO4 eyenziwe yijeli yegranular iyahlanjwa. Lawula i-anion nganye ngaphakathi koluhlu olufunwa yinkqubo. Kunokuthiwa ukuba inxalenye enkulu yeempawu ze-pore ze-silica gel egqityiweyo igqitywe ngokuguga kwenkqubo yokuhlamba irabha, kwaye iqondo lokuguga lale nkqubo lixhomekeke ekusebenzeni kwi-pickling, ukuhlamba kunye nenkqubo yokuhlamba irabha.
Okwesihlanu, ukomisa, i-hydrogel elungiselelwe (emva kokuhlamba) kwigumbi lokumisa, kwiimeko ezithile zokunciphisa umthamo wamanzi we-gel ngokwawo ukomisa kuluhlu olufunekayo. Iqondo lokushisa eliphezulu lokumisa, liphezulu izinga lokuhlanganiswa kwamasuntswana aphambili kunye nokuvuleka okukhulu.
Isithandathu, ukukhangela, umatshini wokukhetha ibhola uya kumisa emva kwe-silicone ngesikrini se-apertures ehlukeneyo ngokuhambelana nomlinganiselo othile we-particle size screening out, kwaye ngelo xesha kuya kuphulwa i-silica gel screening out.
Isixhenxe, iglue yokukhetha: ijeli ye-silica kwibhola ye-heterochromatic, ukungcola kukhetha kwaye emva koko kusetyenziswe iphepha elidibeneyo ngokweemfuno zokupakisha, emva kokutywinwa. Emva kwamanyathelo angentla, imveliso ye-silicone iveliswa.
Ixesha lokuposa: Nov-14-2023
