Lub cev mechanism ntawm AZS refractory cib thiab npuas tsim
Lub moltenAZS cibNws muaj ntau qhov pores hauv, thiab sab hauv ntawm cov pores yog ntim nrog roj. Cov roj muaj pes tsawg leeg zoo ib yam li huab cua, uas yog, feem ntau yog nitrogen, oxygen, thiab cov pa roj carbon dioxide me me. Raws li lub sij hawm sib cuag ntawm AZS cib thiab iav kua nce, vim qhov yaig ntawm lub cib nto, cov voids sab hauv yuav raug nthuav tawm, thiab cov roj ntim hauv yuav raug tso tawm tib lub sijhawm los tsim cov npuas.
Cov txheej txheem tshuaj ntawm AZS refractory thiab npuas tsim
Lub molten AZS refractory muaj cov impurity uas tuaj yeem oxidized rau cov roj, xws li carbon, sulfur, zirconium carbide, nitride, nitrogen oxide, thiab lwm yam. Thaum lub AZS refractory cib yog rhuab mus rau saum toj 1400 degree, cov impurity ntsiab yuav undergo oxidation cov tshuaj tiv thaiv. los tsim cov nitrogen, carbon monoxide, carbon dioxide, sulfur dioxide thiab lwm yam gases.
Thaum lub molten AZS cib yog txias thiab cua sov dua, cov pa npuas thiab cov npuas thib ob feem ntau yog tsim los ntawm qhov chaw sib cuag ntawm cov kua iav thiab cov molten AZS cib. Qhov no yog vim, feem ntau, nrum AZS cib muaj me me (<0.3% (mass fraction)) of variable valence elements, such as iron (Fe, Fe) or titanium (Ti, Ti). These variable valence elements can change their valence state with the change of temperature, thereby completing the role of absorbing or releasing oxygen.
Thaum qhov kub thiab txias, qhov sib npaug ntawm cov tshuaj tiv thaiv tau mus rau qhov zoo, uas yog qhov tsim nyog rau kev tsim Fe3+. Thaum qhov kub thiab txias nce, qhov sib npaug ntawm cov tshuaj tiv thaiv tau mus rau qhov kev taw qhia rov qab (rov qab cov tshuaj tiv thaiv), uas yog qhov tsim nyog rau kev tsim O2.
Lwm qhov laj thawj ntawm kev tsim cov pa oxygen yog cov tshuaj tiv thaiv electrochemical ntawm cov iav yaj thiab AZS refractory cib, los yog cov tshuaj tiv thaiv "remote" electrochemical thaum lub iav yaj thiab AZS refractories tsis nyob rau hauv kev sib cuag. Alkali hlau lossis alkaline ntiaj teb hlau ions yog lub luag haujlwm rau kev hloov hluav taws xob. Hauv cov tshuaj tiv thaiv roj teeb no, cov pa oxygen ions (O2-) hauv cov iav yaj yog oxidized rau oxygen (O2).
Lub iav yaj yog nyob rau hauv kev sib cuag nrog cam khwb cia AZS cib. Qhov concentration ntawm alkali hlau los yog alkaline ntiaj teb hlau ions nyob rau hauv lub iav yaj yog ntau ntau dua li nyob rau hauv lub refractory. Tsis tas li ntawd, vim yog qhov infiltration ntawm lub iav theem, cov hlau ions Mn + yuav diffuse mus rau hauv lub refractory. Qhov tshwm sim yog tias nws neutralizes cov electrons diffused rau hauv AZS refractory khoom, tswj hluav taws xob neutrality.
