Kalit so‘zlar
karbotermik tiklanish
rux oksidi
temir oksidlari
kinetika
metallizatsiya darajasi
faollanish energiyasi
gaz-qattiq reaksiya
ikkilamchi xomashyo
skanerlovchi elektron mikroskopiya
energiya dispersion spektroskopiya
Iqtibos keltirish tartibi
Annotatsiya
Mazkur maqolada po‘lat eritish jarayonida hosil bo‘ladigan changni karbotermik qaytarish jarayonining kinetikasi hamda unga ta’sir etuvchi asosiy omillar bo‘yicha olib borilgan ilmiy tadqiqot natijalari bayon etilgan. Elektr yoy pechi changi tarkibida temir va rux oksidlarining sezilarli miqdorda mavjudligi aniqlangan bo‘lib, ular qimmatli ikkilamchi xomashyo hisoblanishi bilan birga, jiddiy ekologik xavf ham tug‘diradi. Tadqiqotda harorat, qaytaruvchi modda miqdori, zarracha o‘lchami, gaz muhiti va qaytarish davomiyligining jarayon kinetikasiga ta’siri o‘rganilgan. Karbotermik qaytarish tajribalari 700–1150 °C harorat oralig‘ida, qaytaruvchi sifatida koksdan foydalangan holda amalga oshirilgan. Qaytarilish va metallanish darajasi gravimetrik usullar hamda fazaviy tahlil yordamida aniqlangan. Fazaviy tarkib va mikrostrukturaviy o‘zgarishlar rentgen difraksiyasi (XRD), skanerlovchi elektron mikroskopiya (SEM) hamda energiya-dispersiv spektroskopiya (EDS) usullari orqali o‘rganilgan. Eksperimental ma’lumotlar jarayon tezligini cheklovchi bosqichlarni aniqlash maqsadida qisqaruvchi yadro (Shrinking Core) modeli asosida tahlil qilingan. Natijalar rux oksidi temir oksidlariga nisbatan tezroq qaytarilishini ko‘rsatdi, bu esa uning pastroq termodinamik barqarorligi va bug‘lanishga moyilligi bilan izohlanadi. Aktivlanish energiyasi va kinetik parametrlar Arrenius tenglamasi asosida hisoblab chiqilgan. Olingan natijalar sanoat sharoitida po‘lat eritish changlarini qayta ishlash samaradorligini oshirish hamda karbotermik qaytarish jarayonlarini optimallashtirish uchun ilmiy asos bo‘lib xizmat qiladi.
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Mualliflik huquqi (c) 2026 Ilхamov, M.A., Munosibov, Sh.M., Matkarimov, S.T., Karimjonov, B.R. (Muallif)