Izidingo ezijwayelekile zezinto eziphikisayo zama-arc arc kagesi yilezi:
(1) I-refractoriness kufanele ibe phezulu. Izinga lokushisa le-arc lidlula i-4000 ° C, futhi izinga lokushisa le-steelmaking liyi-1500 ~ 1750 ° C, ngezinye izikhathi lifinyelela ku-2000 ° C, ngakho-ke izinto eziphikisayo ziyadingeka ukuze zibe ne-refractoriness ephezulu.
(2) Izinga lokushisa elithambile ngaphansi komthwalo kufanele libe phezulu. Isithando somlilo sikagesi sisebenza ngaphansi kwezimo zomthwalo ophezulu wokushisa, futhi umzimba wesithando somlilo kufanele umelane nokuguguleka kwensimbi encibilikisiwe, ngakho-ke impahla ephikisayo iyadingeka ukuze kube nokushisa okuphezulu okuthambisa umthwalo.
(3) Amandla okucindezela kufanele abe phezulu. Ilayini yesithando somlilo sikagesi ithintwa umthelela weshaji ngesikhathi sokushaja, ingcindezi emile yensimbi encibilikisiwe ngesikhathi sokuncibilika, ukuguguleka kokugeleza kwensimbi ngesikhathi sokuthepha, kanye nokudlidliza komshini ngesikhathi sokusebenza. Ngakho-ke, i-refractory material iyadingeka ukuze ibe namandla aphezulu okucindezela.
(4) I-conductivity eshisayo kufanele ibe encane. Ukuze kuncishiswe ukulahlekelwa ukushisa kwesithando somlilo kagesi futhi kuncishiswe ukusetshenziswa kwamandla, izinto eziphikisayo ziyadingeka ukuze zibe ne-conductivity ephansi ye-thermal, okungukuthi, i-coefficient conductivity ye-thermal kufanele ibe mncane.
(5) Ukuzinza kwe-thermal kufanele kube kuhle. Phakathi nemizuzu embalwa ukusuka ekuthepheni kuye ekushajweni ekwenzeni insimbi yesithando somlilo, izinga lokushisa lehla kakhulu lisuka cishe ku-1600°C liye ngaphansi kuka-900°C, ngakho-ke izinto eziphikisayo ziyadingeka ukuze kube nokuzinza okuhle kokushisayo.
(6) Ukumelana nokugqwala okuqinile. Ngesikhathi senqubo yokwenza insimbi, i-slag, igesi yesithando somlilo kanye nensimbi encibilikisiwe konke kunemiphumela enamandla yokuguguleka kwamakhemikhali ezintweni eziphikisayo, ngakho-ke izinto eziphikisayo ziyadingeka ukuze zibe nokuphikiswa okuhle kokugqwala.
Ukukhethwa kwezinto eziphikisayo zezindonga eziseceleni
Izitini ze-MgO-C zivame ukusetshenziselwa ukwakha izindonga eziseceleni zezithando zikagesi ngaphandle kwezindonga zokupholisa amanzi. Izindawo ezishisayo kanye nemigqa ye-slag inezimo zesevisi ezinzima kakhulu. Azikona nje kuphela ukugqwala okukhulu futhi zigugulwe yinsimbi encibilikisiwe kanye ne-slag, kanye nomthelela onzima wemishini lapho kufakwa izicucu, kodwa futhi zingaphansi kwemisebe eshisayo evela ku-arc. Ngakho-ke, lezi zingxenye zakhiwe ngezitini ze-MgO-C ezisebenza kahle kakhulu.
Ezindongeni eziseceleni zezithando zikagesi ezinezindonga ezipholile ngamanzi, ngenxa yokusetshenziswa kobuchwepheshe bokupholisa amanzi, umthwalo wokushisa uyanda futhi izimo zokusebenzisa ziqinile. Ngakho-ke, izitini ze-MgO-C ezinokumelana okuhle kwe-slag, ukuzinza kokuthuthumela okushisayo kanye ne-conductivity ephezulu yokushisa kufanele kukhethwe. Okuqukethwe kwawo kwekhabhoni kungu-10% ~ 20%.
Izinto eziphikisayo zezindonga eziseceleni zamafurnaces anamandla kagesi aphezulu
Izindonga eziseceleni zamandla kagesi aphezulu kakhulu (izithando ze-UHP) zakhiwe kakhulu ngezitini ze-MgO-C, futhi izindawo ezishisayo nezindawo zomugqa we-slag zakhiwe ngezitini ze-MgO-C ezisebenza kahle kakhulu (njenge-carbon matrix MgO-C egcwele. izitini). Ithuthukise kakhulu impilo yayo yesevisi.
Nakuba umthwalo wodonga lwesithando somlilo uncishisiwe ngenxa yokuthuthukiswa kwezindlela zokusebenza zesithando somlilo kagesi, kusenzima ezintweni eziphikisayo ukwandisa impilo yesevisi yezindawo ezishisayo lapho kusebenza ngaphansi kwezimo zokuncibilikisa isithando se-UHP. Ngakho-ke, ubuchwepheshe bokupholisa amanzi senziwe futhi busetshenziswa. Ezithandweni zikagesi zisebenzisa i-EBT tapping, indawo yokupholisa amanzi ifinyelela ku-70%, ngaleyo ndlela inciphisa kakhulu ukusetshenziswa kwezinto eziphikisayo. Ubuchwepheshe besimanje bokupholisa amanzi budinga izitini ze-MgO-C ezine-conductivity enhle yokushisa. I-asphalt, izitini ze-resin-bonded magnesia nezitini ze-MgO-C (okuqukethwe kwekhabhoni 5% -25%) kusetshenziselwa ukwakha izindonga ezisemaceleni zesithando somlilo kagesi. Ngaphansi kwezimo ezinzima ze-oxidation, ama-antioxidants ayengezwa.
Ezindaweni ze-hotspot ezilinyazwe kakhulu ukusabela kwe-redox, izitini ze-MgO-C ezine-crystalline fused magnesite njengempahla eluhlaza, okuqukethwe kwekhabhoni okukhulu kuno-20%, kanye ne-carbon matrix egcwele isetshenziselwa ukwakha.
Ukuthuthukiswa kwakamuva kwezitini ze-MgO-C zezithando zikagesi ze-UHP ukusebenzisa ukudubula okunezinga lokushisa eliphezulu bese kugxiliswa ngetiyela ukukhiqiza okuthiwa izitini ezishisiwe ze-asphalt-impregnated MgO-C. Njengoba kungabonwa kuThebula 2, uma kuqhathaniswa nezitini ezingamithiswanga, insalela yekhabhoni yezitini ze-MgO-C ezishisiwe ngemva kokufakwa kwetiyela kanye nokukhipha kabusha ikhabhoni kukhuphuka cishe ngo-1%, i-porosity iyancipha ngo-1%, kanye namandla okuguquguquka okuphakeme okushisa nokucindezela. ukumelana kukhona Amandla athuthukiswe kakhulu, ngakho anokuqina okuphezulu.
I-Magnesium refractory materials for electric furnace side izindonga
Izindwangu zesithando somlilo zikagesi zihlukaniswe zibe yi-alkaline ne-acidic. Owokuqala usebenzisa izinto eziphikisayo ze-alkaline (njenge-magnesia ne-MgO-CaO refractory materials) njengolwelwesi lwesithando somlilo, kuyilapho lezi zamuva zisebenzisa izitini ze-silica, isihlabathi se-quartz, udaka olumhlophe, njll. ukwakha ulayini lwesithando somlilo.
Qaphela: Okwezinto zokwenziwa kolayini lwesithando somlilo, iziko likagesi eline-alkaline zisebenzisa izinto eziphikisayo ezine-alkali, kanti iziko likagesi eline-asidi zisebenzisa izinto eziphikisayo ezine-acidic.
Isikhathi sokuthumela: Oct-12-2023
