Indlela ye-air oxidation yindlela ye-oxidation esebenzisa umoya-mpilo emoyeni kuya emoyeni ku-oxidizeumrintshiku-tetravalent ngaphansi kwezimo ezithile. Le ndlela imvamisa ifaka ukugcotshwa kokugcotshwa kwe-fluorocarbon cerium ore, ama-carbonates asemhlabeni ngomoya (okwaziwa yi-oxidation ethosiwe) noma ukwethula umoya emhlabathini emhlabathini we-hydroxides slurry (emanzi acivisation) nge-oxidation.
1, ukugcotshwa koxidation
Ukugcotshwa kwe-coorocarbonbhonbon kugxile emoyeni ngo-500 ℃ noma ukugcona umhlaba weBaiyonebo Rare Gxila nge-sodium carbonate emoyeni ngo-600-700 ℃. Ngesikhathi sokuwohloka kwamaminerali omhlaba anqabile, i-cersium kumaminerali afakwa oxidiway to tetravalent. Izindlela zokuhlukanisaumrintshiKusuka kwimikhiqizo ebekiwe ifaka phakathi i-Rare Earth Sulfate SALTASE indlela, indlela yokukhishwa kwe-solvent, njll.
Ngaphezu kokugazinga kwe-oxidation kweUmhlaba ongavamileGxila, usawoti onjengomhlaba ongavamile oxakayo oxakile futhi ongavamile emhlabeni we-carbonate uqoqeke emkhathini womoya, futhi i-certium ifakwe ku-CEO2. Ukuqinisekisa inhlangano enhle yengxubevange ye-ART Earth Earth Axide etholwe ngokugazinga, izinga lokushisa eligazingi akufanele liphezulu kakhulu, livame phakathi kuka-700 no-800 ℃. I-oxides ingachithwa ku-1-1.5mol / l sulfuric acid solution noma 4-5mol / l nitric acid solution. Lapho i-leading ibole i-ore nge-sulfuric acid ne-nitric acid, i-cerrium ikakhulukazi ingena kwikhambi ngendlela ye-tetravalEnt. Owayengulowo owayengulowo owayengubandakanya ukuthola isixazululo se-surfate esingu-Sulfate equkethe i-50g / l Reo ezungeze ama-45 ℃, bese ukhiqiza i-cellium dioxide esebenzisa indlela ye-P0204; Lesi sakamuva sibandakanya ukulungiselela isixazululo somhlaba esingavamile esiqukethe i-reo ka-150-200g / l ekushiseni kwe-80-85 ℃, bese kusetshenziswa ukukhishwa kwe-TBP ukuze uhlukanise i-Certium.
Lapho umhlaba ongavamile oxides uchithwa nge-dilute sulfuric acid noma i-nitric acid, i-CEO2 ye-infolcieble. Ngakho-ke, inani elincane le-hydrofluoric acid lidinga ukungezwa kwisixazululo njenge-catalyst esiteji sakamuva sokuchithwa kokulungisa i-solubity ye-CEO2.
2, Oxidation eyomile yomoya
Beka i-Hydroxide yomhlaba engavamile esithandweni sokomiswa bese ukhetha ngaphansi kwezimo zomoya ezi-100-120 ℃ amahora angu-16- 24. Ukusabela kwe-oxidation kungokulandelayo:
4ce (oh) 3 + O2 + 2h2o = 4CE (oh) 4
Izinga le-oxidation ye-certium lingafinyelela kuma-97%. Uma izinga lokushisa le-oxidation liye lenyuka liye ku-140 ℃, isikhathi se-oxidation singafinyezwa amahora angama-4-6, futhi isilinganiso se-oxidation se-cersium singafinyelela futhi 97% ~ 98%. Inqubo esomile yomoya oxidation ikhiqiza inani elikhulu lothuli kanye nezimo zabasebenzi ezimpofu, ezisetshenziswa ikakhulukazi elabhoratri.
I-3, i-armospheric emanzi yomoya oxidation
Hlanganisa umhlaba we-hydroxide ngamanzi ukuze wakhe i-slurry, lawula ukugxila kwe-reo ku-50-70g / l, ungeze i-naoh ukukhulisa i-alkality of the 0.15-0.30Mol Ngesikhathi senqubo ye-oxidation, ukuhwamuka kwamanzi kukhulu, ngakho-ke inani elithile kufanele lisekelwe nganoma yisiphi isikhathi ukuze lilondoloze ukugxila okuzinzile komhlaba. Lapho ama-40l we-slurry efakwe ku-batch ngayinye, isikhathi se-oxidation ngamahora ama-4-5, futhi isilinganiso se-oxidation se-cersium singafinyelela kuma-98%. Lapho i-8m3 ye-Rare Eard Hydroxide Slurry i-oxidised isikhathi ngasinye, isilinganiso sokugeleza komoya singu-8-12m3 / min, futhi isikhathi se-oxidation sikhuphuke saya ku-15h, isilinganiso se-oxidation se-cersium singafinyelela ku-97% ~ 98%.
Izici zendlela ye-armosperic woir air oxidation yilezi: Izinga eliphakeme le-oxidation ye-CERIUM, ukuphuma okukhulu, izimo ezinhle zokusebenza, ukusebenza okulula, futhi le ndlela ivame ukusetshenziswa embonini ukukhiqiza i-Certium Dioxide.
I-4, yacindezela i-oxidation emanzi
Ngaphansi kwengcindezi evamile, i-air oxidation ithatha isikhathi eside, futhi abantu banciphise isikhathi se-oxidation ngokusebenzisa ingcindezi. Ukwanda kwengcindezi yomoya, okungukuthi, ukwanda kwengcindezi enkulu yo-oxygen ohlelweni, kuyasiza ekuchithweni komoya-mpilo kwisixazululo kanye nokuphazamiseka kwe-oksijini kuya ezinkingeni zomhlaba we-hydroxide, ngaleyo ndlela kusheshise inqubo ye-oxidation.
Hlanganisa i-Hydroxide yaseMhlabeni nge-60G / L, lungisa i-PH kuya ku-13 nge-sodium hydroxide, uphakamise umoya we-sodium hydroxide, uphakamise umoya nge-oxidation, ulawule umfutho ngo-0.4MPA ngehora eli-1. Izinga le-oxidation ye-cersium lingafinyelela ngaphezulu kwama-95%. Ekukhiqizweni kwangempela, i-oxidation engajwayelekile yezinto ezibonakalayo zomhlaba i-hydroxide itholakala ngokuguqulwa kwe-alkali ngokusebenzisa imvula ye-rare Earth Solium Sulfate Catsat. Ukuze unciphise inqubo, izulu le-rare Earth Sodium Sulfate Complex Sulfal SALT kanye ne-Alkaline Solution ingangezwa ethangini le-oxidation elicindezelwe, ukugcina ingcindezi ethile kanye nokushisa. Umoya noma i-oksijini yomoya noma ecebile ungangethulwa ukuguqula umhlaba ongavamile usawoti onzima ube yi-Rare Earth hydroxides, futhi ngasikhathi sinye, CE (oh) 3 Kuyo ungafakwa ku-CE (oh) 4.
Ngaphansi kwezimo ezicindezelwe, izinga lokuguqulwa kwe-alkali likasawoti oluyinkimbinkimbi, izinga le-oxidation ye-cersium, kanye ne-oxidation rate of cerium athuthukile. Ngemuva kwemizuzu engama-45 yokusabela, isilinganiso sokuguqulwa sikasawoti osheshayo kanye nesilinganiso se-oxidation se-cerrium esifinyelelwe ngaphezulu kwama-96%.
Isikhathi sePosi: Meyi-09-2023