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 ke i-sodium silicate eqinileyo iyanyibilika kubushushu obuphezulu kwaye ihluzwe ukulungiselela uxinaniso oluthile lolwelo, kwaye i-asidi yesulfuric ilungiswa kugxininiso 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.Ukuphakama kweqondo lokushisa lokumisa, liphezulu izinga lokudityaniswa 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
