Indima ebalulekile ye-silicon carbide powder eluhlaza ezintweni eziphikisayo
I-silicon carbide powder eluhlaza, igama lizwakala liqinile. Empeleni kuwuhlobo oluthilei-silicon carbide (SiC), encibilika ngaphezu kwama-degree angu-2000 esithandweni sokumelana nezinto zokusetshenziswa njengesihlabathi se-quartz ne-petroleum coke. Ihlukile kokujwayelekilei-silicon carbide emnyama, inokulawula okunembile kwenqubo esigabeni sakamuva sokuncibilika, ngokungcola okumbalwa kakhulu nokuhlanzeka kwekristalu okuphezulu, ngakho-ke inikeza umbala oyingqayizivele ohlaza okwesibhakabhaka noma omnyama. Lokhu "kuhlanzeka" kunikeza cishe ubulukhuni obedlulele (ukuqina kwe-Mohs kuphezulu njengo-9.2-9.3, okwesibili ngemuva kwedayimane ne-boron carbide) kanye nokuhamba kahle okushisayo okushisayo namandla aphezulu okushisa. Enkundleni yezinto eziphikisayo, "ithambo eliqinile" elingakwazi ukumelana, ukulwa, ukushisa nokwakha.
Ngakho-ke, le powder eluhlaza ingabonisa kanjani amandla ayo ezweni elinzima lezinto eziphikisayo futhi ibe "indoda eyisihluthulelo" ebaluleke kakhulu?
Thuthukisa amandla bese uphonsa "amathambo ensimbi" aphezulu okushisa: Izinto eziphikisayo zesaba kakhulu "ukungakwazi ukumelana" namazinga okushisa aphezulu, zibe thambile futhi zigoqe.I-silicon carbide micropowder eluhlazainobulukhuni obuphezulu ngokwedlulele namandla asezingeni eliphezulu. Ukuyengeza kuma-castable ahlukahlukene e-refractory, i-ramming materials noma izitini kufana nokwengeza inetha lensimbi elinamandla aphezulu kukhonkolo. Ingakha uhlaka lwamathambo oluqinile ku-matrix, imelana kakhulu nokuguqulwa nokuthambisa impahla ngaphansi komthwalo ophezulu wokushisa. Ama-castable we-blast furnace iron channel yesitshalo esikhulu sensimbi asebenzise izinto ezijwayelekile ngaphambili, ezaguguleka ngokushesha, izinga lokugeleza kwensimbi alikwazanga ukunyuswa, kanye nokugcinwa njalo kwabambezeleka ukukhiqizwa. Kamuva, kwenziwa ukuphumelela kwezobuchwepheshe, kanye nengxenye yei-silicon carbide micropowder eluhlaza yanda kakhulu. “Heyi, kuyamangalisa!” Kamuva umqondisi womhlangano wokusebenzela wakhumbula, “Lapho kufakwa izinto ezintsha, insimbi encibilikisiwe igeleza, uhlangothi lwesiteshi ngokusobala ‘lwaluma’, izinga lokugeleza kwensimbi libheke phezulu, nenani lezikhathi zokunakekela lancipha ngaphezu kwengxenye, futhi yonke imali eyongiwe yayiyimali yangempela!” Lokhu kuqina kuyisisekelo sokuphila isikhathi eside kwemishini yokushisa ephezulu.
Thuthukisa ukuqhutshwa kokushisa bese ufaka "i-heat sink" endabeni: Uma i-heat-insulating i-refractory material, kungcono! Ezindaweni ezifana nezicabha ze-coke oven kanye nezindonga eziseceleni zeseli ye-aluminium electrolytic, into ngokwayo idinga ukuphatha ukushisa kwangaphakathi ngokushesha ukuze kuvinjelwe izinga lokushisa lasendaweni ukuthi lingabi phezulu kakhulu futhi lonakaliswe. I-thermal conductivity ye-green silicon carbide micropowder nakanjani “ingumfundi omuhle kakhulu” phakathi kwezinto ezingezona ezensimbi (i-coefficient yezinga lokushisa elishisayo ingafinyelela ngaphezu kuka-125 W/m·K, okuyizikhathi eziningi kunezitini zobumba ezijwayelekile). Ukuyengeza entweni ephikisayo engxenyeni ethile kufana nokushumeka "ipayipi lokushisa" elisebenza kahle kokubalulekile, okungathuthukisa ngokuphawulekayo ukuqhutshwa kwe-thermal kukonke, kusize ukushisa ukuthi kusheshe futhi kuhlakazwe ngokulinganayo, futhi kugweme ukushisa okweqile kwendawo nokuxebuka noma ukulimala okubangelwa "isilungulela".
Thuthukisa ukumelana nokushaqeka okushisayo futhi uthuthukise ikhono "lokuhlala uzolile lapho ubhekene noshintsho": Omunye "wababulali" abahlupha kakhulu bezinto eziphikisayo ukupholisa okusheshayo nokushisa. Isithando somlilo sivuliwe futhi sivaliwe, futhi izinga lokushisa liyashintshashintsha ngamandla, futhi izinto ezijwayelekile kulula "ukuqhuma" futhi zicwecwe.I-silicon carbide eluhlazaI-micropowder ine-coefficient encane yokwandisa okushisayo kanye ne-thermal conductivity esheshayo, engalinganisa ngokushesha ingcindezi ebangelwa umehluko wezinga lokushisa. Ukuyethula ohlelweni lwe-refractory kungathuthukisa kakhulu ikhono lempahla lokumelana nokushintsha kwezinga lokushisa okungazelelwe, okungukuthi, “i-thermal shock resistance”. Insimbi yomlomo kahhashi efakwa kuhhavini usimende ihlaselwa amakhaza amakhulu kakhulu futhi ishisa kakhulu, futhi ukuphila kwayo isikhashana kwakuyinkinga isikhathi eside. Unjiniyela ongumakadebona wokwakha isithando somlilo wangitshela: “Selokhu kwasetshenziswa izinsimbi ezinamandla kakhulu ezine-silicon carbide micropowder eluhlaza njengengxenye eyinhloko nempushana, umphumela uye waba ngokushesha.” Lapho umoya obandayo uphephetha lapho uhhavini umiswa ukuze ulungiswe, ezinye izingxenye ziyaqhekeka, kodwa lo mlomo wesithando somlilo uqinile futhi uzinzile, futhi kuba nokuqhekeka okuningi okukhandwayo, ngemva kokuwohloka okuningi kuyancipha. imizamo!” Lokhu “kuzola” wukubhekana nokukhuphuka nokwehla kwemikhiqizo.
Ngobai-silicon carbide micropowder eluhlaza ihlanganisa amandla aphezulu, izinga eliphezulu le-thermal conductivity, ukumelana nokushaqeka okuhle kakhulu kokushisa, nokumelana nokuguguleka okuqinile, sekube "umlingani womphefumulo" ekwakhiweni kwezinto zesimanje eziphikisayo ezisebenza kahle kakhulu. Kusukela ezithandweni eziqhumayo, iziguquli, imisele yensimbi, namathangi e-torpedo kunsimbi nensimbi kuya kumaseli e-electrolytic ku-metallurgy engashisi; kusukela ezingxenyeni ezibalulekile zeziko likasimende kanye neziko lengilazi embonini yezinto zokwakha kuye kwezimbadla kakhulu emikhakheni yemboni yamakhemikhali, amandla kagesi, nokushiswa kwemfucuza, ngisho nezinkomishi ezithelayo nezitini zensimbi ezigelezayo ukuze ziphonswe... Nomaphi lapho kunokushisa okuphezulu, ukuguga, ukuguquka okuzumayo, nokuguguleka, le micropowder eluhlaza iyasebenza. Ifakwe buthule kuzo zonke izitini eziphikisayo nakuso sonke isikwele sokuphonswa, esihlinzeka ngokuvikeleka okuqinile "kwenhliziyo" yemboni - iziko lokushisa eliphezulu.
Yiqiniso, "ukutshalwa" kwe-silicon carbide micropowder eluhlaza ngokwayo akulula. Ukusuka ekukhethweni kwezinto ezingavuthiwe, ukulawulwa okunembile kwenqubo yokuncibilikisa isithando somlilo (ukuqinisekisa ukuhlanzeka nokuluhlaza), ukuchotshozwa, ukugaya, ukususwa kokungcola nokungcola, ukuhlukaniswa kwe-hydraulic noma ukugeleza komoya okunembayo, ukupakisha okuqinile ngokuya kokusabalalisa usayizi wezinhlayiyana (kusuka kuma-microns ambalwa kuya kumakhulu ama-microns), isinyathelo ngasinye sihlobene nokusebenza komkhiqizo okuzinzile kokugcina. Ikakhulukazi, ukuhlanzeka, ukusabalalisa usayizi wezinhlayiyana kanye nokuma kwezinhlayiyana ze-micropowder kuthinta ngokuqondile ukuhlakazeka kwayo kanye nomphumela ezintweni eziphikisayo. Kungashiwo ukuthi ikhwalithi ephezulu ye-silicon carbide micropowder ngokwayo ingumkhiqizo wenhlanganisela yobuchwepheshe nobuciko.