izindaba

I-fiber refractoryngendlela yokudlulisa ukushisa kungahle kuhlukaniswe izakhi eziningana, ukudluliswa kokushisa kwemisebe ye-silo enezimbotshana, umoya ongaphakathi kwe-silo enezimbotshana zokushisa kanye ne-thermal conductivity ye-fiber eqinile, lapho ukudluliswa kokushisa kwe-convective komoya kunganakwa. Ukuminyana ngobuningi kanye nezinga lokushisa kunobudlelwano obuncikene, izinga lokushisa liphezulu, liyancipha ukuminyana kwenqwaba yekesi, isilinganiso sokudluliswa kokushisa kwemisebe siyenyuka. Ngemikhiqizo ye-fiber refractory, ukuminyana kwenqwaba kuvame ukuba ngaphansi kuka-0.25g/cm', i-porosity ingaphezu kuka-90%, isigaba segesi singabonakala njengokuqhubekayo, isigaba esiqinile singabonakala njengesinqamuki, ngakho-ke ukuqhutshwa kokushisa okuqinile kwe-fiber kuncane kakhulu.
Uma nje kusukela embonweni wokuthi ukuminyana ngobuningi kuncane, ukuqhutshwa kwe-thermal kukhulu, ukuminyana kwenqwaba kukhulu kwe-thermal conductivity encane; lokhu futhi akuhambisani nesimo sangempela, njengokuqukethwe kwebhola le-slag kuhlukile, noma ngabe ukuminyana kwenqwaba kufana, inani lemicu ngevolumu yeyunithi lihlukile, ukuze i-porosity ngevolumu yeyunithi ayifani, ngakho-ke kuyoba khona umehluko ekuqhubeni okushisayo. Nokho, iziphetho zekhwalithi zingafingqwa ngale ndlela elandelayo.
1. Thermal conductivity ofimicu ye-refractorykuncipha ngokunyuka kokuminyana, futhi ukuncipha kuncipha kancane kancane, kodwa lapho ukuminyana kufinyelela ebangeni elithile, ukuqhutshwa kokushisa akusanciphisi futhi kunomkhuba wokwanda kancane kancane.
2. Emazingeni okushisa ahlukene, kukhona ubuncane be-thermal conductivity kanye nokuminyana okuncane okuhambisanayo. Ukuminyana okuhambisana nobuncane be-thermal conductivity kukhuphuka ngokukhuphuka kwezinga lokushisa.
3. Ngobuningi obufanayo, ukuqhutshwa kwe-thermal kuyahlukahluka ngobukhulu be-pores.
(1) Usayizi wembotshana 0.1mm.
0C ibe = 0.0244W/(m. K) 100C lapho λ = 0.0314W / (m. K)
(2) Isimbobo esingu-2mm.
Ku-0C = 0.0314W/(m, K) λ = 0. 0512W/(m. K) ku-100C. K)
I-pore ububanzi be-1mm, izinga lokushisa likhuphuka lisuka ku-0C liye ku-500C, inani layo le-conductivity eshisayo likhuphuka izikhathi ezingu-5.3; pore ububanzi 5mm, izinga lokushisa likhuphuka lisuka ku-0C kuya ku-500C, izinga layo conductivity ezishisayo landa izikhathi 11.7. Ngakho-ke, ama-pores amakhulu ku-fiber refractory, amancane ukuminyana kwenqwaba ehambisanayo, futhi ukuqhutshwa kwe-thermal kuyanda.