Ukusetshenziswa: ekukhiqizweni kwe-aluminium hydroxide. I-Essence: imbewu ye-aluminium hydroxide iyachotshozwa, ixube nesisombululo se-aluminate. Ukumiswa okubangelwayo kufakwa ngokuxubha bese kuphathwa nge-carbon dioxide. Ukuhlukanisa i-aluminium hydroxide notshwala obungumama. I-aluminium hydroxide iyagezwa.
Lokhu kusungulwa kuhlobene nokukhiqizwa kwe-aluminium hydroxide.
Indlela yokuthola i-aluminium hydroxide enhle [1] lapho inqubo iqhutshwa khona ngezigaba ezimbili. Esigabeni sokuqala isixazululo se-aluminate siyasuswa nge-hydrochloric acid, bese kuthi i-aluminium hydroxide ehlakazekile kahle ephumayo isetshenziswe njengokubola kwembewu yesisombululo se-aluminate esigcwalisiwe kakhulu esigabeni sesibili.
Ububi bale ndlela yizindleko eziphezulu ezibangelwa ukuncishiswa kwe-alkali ebangela ukungcola yi-asidi, ukuqongelela kokungcola ezixazululweni, njll.
Okuseduze kakhulu nalokhu okusunguliwe yindlela [2] lapho kusetshenziswa khona i-aluminium hydroxide eyimpuphu ukuze kukhiqizwe i-aluminium hydroxide enhle njengembewu.
Ububi bale ndlela yisisombululo se-wintopo esiphezulu.
Inhloso yalo mshini ukunciphisa izindleko zamandla ngokwandisa umkhiqizo we-aluminium hydroxide enhle.
Ukucubungula izixazululo ze-aluminate nge-carbon dioxide, inqubo yokwenza i-carbonization isetshenziswa kabanzi ezitshalweni ze-alumina ezisebenza ngendlela yokuthulula. Ukusetshenziswa kwe-carbonization kunganikeza i-hydroxide ephumayo ephezulu.
Usayizi wezinhlamvu ze-aluminium hydroxide ezitholakala enqubweni yokwenza i-carbonization uncike kakhulu ekushiseni kwe-carbonization kanye nokwakheka kwezixazululo ze-aluminate (ukuhlushwa kwe-alkali ne-alumina).
Indlela eyaziwayo (izinsimbi ezilula. 1937, No. 10, S. 8-15) ukukhiqizwa kwe-aluminium hydroxide enhle ngendlela ye-carbonization, okuhlanganisa ukucutshungulwa kwezixazululo ze-carbon dioxide ultracracker aluminate (ukuhlushwa okungu-200 g/l) emazingeni okushisa aphansi (30mayelanaC).
Nakuba le ndlela inikeza i-aluminium hydroxide enhle ephumayo ephezulu, ukusetshenziswa kwayo akunakwenzeka ngenxa yobunzima bobuchwepheshe obuvela ezigabeni zokugcina zenqubo: uMnyango wemvula nokuwasha.
Kodwa-ke, uma kusetshenziswa indlela ye-nizkokontsentrirovannye yokwenza i-carbonization yehluleka.
Usayizi wezinhlamvu ze-aluminium hydroxide otholakala ngaphansi kwalezi zimo, ubonakala ngokwakheka okungafani kanye nokuqukethwe okuphezulu kwezinhlayiya eziqinile.
Lokhu kusungulwa kusekelwe ekutheni indlela yokukhiqiza i-aluminium hydroxide enhle, ehlanganisa ukugaya imbewu ye-aluminium hydroxide, ukuyixuba nesisombululo se-aluminate, ukuguga kokumiswa okubangelwayo ngokuxubha, ukuhlukanisa i-aluminium hydroxide notshwala obungumama nokuwasha, ngaphambi kokuhlukanisa i-aluminium hydroxide notshwala obungumama, iphathwa nge-carbon dioxide.
Izifundo zibonise ukuthi lapho kucutshungulwa izixazululo ze-carbon dioxide aluminate eziqukethe inani elikhulu lezinto eziqinile, ubukhulu bezinhlayiya bucishe bufane.
Uma kwenziwa imbewu echotshoziwe ngesisombululo se-aluminate esigcwaliswe kakhulu, futhi ukuguga kokumiswa okubangelwayo ngokuxubha kukhiqiza inani elikhulu le-aluminium hydroxide ehlakazekile kakhulu. Kodwa-ke, isivuno se-aluminium hydroxide encane ngaphandle kokucutshungulwa okwengeziwe kokumiswa siphansi futhi sincike ekugxilweni kwe-alkali e-caustic esixazululweni: lapho ukugxilwa kwe-alkali kuphakeme, kulapho umphumela uphansi khona.
Lapho kucutshungulwa i-carbon dioxide, ukumiswa kokuqala kunikezwa umphumela we-aluminium hydroxide kufana nokucubungula ukumiswa ngemva kokuvezwa kokuqala, nokho, kukhulisa kakhulu usayizi wezinhlayiya ze-aluminium hydroxide.
Le ndlela ingasetshenziswa kusetshenziswa ihadiwe ekhona.
Indlela ingcono izitshalo ze-alumina ezisekelwe kubuchwepheshe be-spechitelnoj.
Ukuqhathanisa idatha evela ekuhlolweni okuningi kusikisela ukuthi ukucutshungulwa kwe-hydrate slurry etholwe ngemuva kokuvezwa kwengxube yesisombululo se-aluminate kanye nembewu eqoshiwe, i-carbon dioxide ivumela ukuthola i-aluminium hydroxide enhle futhi iqinisekise isivuno esikhulu somkhiqizo.
I-PRI me R 1. 0.02 kg ye-aluminium hydroxide enobukhulu obumaphakathi obungu-2.8 μm ixutshwe nelitha eli-1 lesisombululo se-aluminate esiqukethe, g/l: Na2I-CMOS 100,8; Al2O3107,4.
Ukumiswa okwalandela kwaphasiswa ngo-60mayelanaNgamahora angaphezu kwe-10 i-Out fine aluminium hydroxide yayingu-40,4, usayizi wezinhlayiya ezimaphakathi ku-sediment ongu-3.6 μm. Ukwakheka kwesigaba soketshezi sokumiswa, ingxube ye-Noi, equkethe cishe i-CO12.2Isikhathi sokucubungula samahora ayi-6 kuya kokuqukethwe okusele kwe-sodium oxide esixazululweni ngemuva kokwelashwa okungu-5.6 g/L.
Usayizi wezinhlayiya ezimaphakathi enhlabathini ngemva kokwelashwa ngu-4.8 μm. Umphumela we-aluminium hydroxide 102,5.
I-PRI mme R 2. 0.02 kg ye-aluminium hydroxide enobukhulu obumaphakathi obungu-2.8 μm yaxutshwa nelitha eli-1 lesisombululo se-aluminate futhi ngokushesha (ngaphandle kokuvezwa) yaphathwa nge-carbon dioxide. Isikhathi sokwelashwa kanye nokuhlushwa kwe-CO22engxubeni yegesi efana nesibonelo 1.
Umphumela we-aluminium hydroxide wawungu-103,1, usayizi wezinhlayiya ezimaphakathi enhlabathini engu-30.4 μm.
Ngakho-ke, ukusetshenziswa kochungechunge olungenhla lwemisebenzi: ingxube yesisombululo se-aluminate nesithako sembewu esichotshoziwe, ukumiswa okubangelwayo, i-carbonation slurry ngaphambi kokuhlukaniswa kwe-aluminium hydroxide kunganikeza i-aluminium hydroxide encane ephumayo ephezulu.
INDLELA yokukhiqizwa kwe-FINE ALUMINUM HYDROXIDE, ehlanganisa ukugaya imbewu ye-aluminium hydroxide, ukuyixuba nesisombululo se-aluminate, ukuguga kokumiswa okubangelwayo ngokuxubha, ukuhlukanisa i-aluminium hydroxide notshwala obungumama kanye nokuwasha,
Isikhathi sokuthunyelwe: Julayi-09-2020