""بررسی اثر نوع و میزان ناخالصی ها در تلفات حرارتی فرایند تف جوشی سنگ معدن منیزیت ""

نوع مقاله : مقاله پژوهشی

نویسنده

• محسن موسوی نژاد

گروه مهندسی مواد و متالورژی، دانشکده فنی و مهندسی، مجتمع آموزش عالی گناباد، خراسان رضوی

10.22067/jmme.2025.92053.1185

چکیده

در این مقاله اثر نوع ناخالصی و مقدار آن بر مصرف انرژی در کوره‌های تف‌جوشی منیزیا به کمک مدل‌سازی ترمودینامیکی مورد بررسی قـــرار گرفته است. بررسی های ترمودینامیکی توسط نرم افزار FactSage 6.1 در بازه‌ی دمایی ℃ 2000-800، فشار atm 1 و به صورت هم‌دما انجام شده است. نتایج نشان می دهد، افزایش خلوص سنگ معدن با افزایش مصرف انرژی همراه است. به عنوان مثال در فرایند کلسیناسیون در دمای ℃ 800، افزایش خلوص سنگ معدن از 85% به 100% باعث افزایش 16 درصدی در مصرف انرژی می شود. این در حالیست که با افزایش دمای حرارت‌دهی به ℃ 1900، همان میزان افزایش خلوص باعث افزایش 7% انرژی مصرفی شده است. همچنین امکان تشکیل ترکیبات مذابی همچون SiO2.2MgO در مقادیر بالاتر ناخالصی اکسید سیلیسیم وجود دارد. این موضوع باعث اتلاف حرارتی بیشتر در فرایند تف جوشی می شود. نتایج این تحقیق نشان می دهد، در شرایطی که ناخالصی‌های اصلی سنگ معدن منیزیت، CaO,SiO2 است، می توان با کنترل نسبت CaO/SiO2 در حدود 1.8، علاوه بر کاهش تلفات انرژی در کوره، مانع از تشکیل ترکیبات سیلیکات منیزیمی شده و خلوص MgO در محصول نهایی را افزایش داد.

کلیدواژه‌ها

• سنگ معدن منیزیت
• آنتالپی
• اکسید کلسیم
• اکسید سیلیسیم
• تف جوشی

موضوعات

• متالورژی استخراجی

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عنوان مقاله [English]

""Investigation of the Effect of Impurity Type and Amount on Heat Loss in the Sintering Process of Magnesite Ore""

نویسنده [English]

• mohsen moosavi nezhad

Department of Metallurgy and materials engineering, Faculty of Engineering, University of Gonabad, Gonabad, Iran

چکیده [English]

This paper investigates the effect of impurity type and amount on energy consumption in magnesium sintering furnaces using thermodynamic calculations. Thermodynamic analyses were conducted using the FactSage 6.1 software within the temperature range of 800 to 2000 °C and at a pressure of 1 atm, under isothermal conditions. The results indicate that an increase in the purity of the ore is accompanied by an increase in energy consumption. For instance, in the calcination process at a temperature of 800 °C, increasing the ore purity from 85% to 100% leads to a 16% increase in energy consumption. Meanwhile, at a temperature of 1900°C, the same increase in purity caused a 7% rise in energy consumption. Additionally, the possibility of forming molten compounds such as SiO2.2MgO exists at higher levels of silicon oxide impurities, which results in greater thermal losses during the sintering process. The results of this study show that when the main impurities in magnesite ore are CaO and SiO2, controlling the CaO/SiO2 ratio at around 1.8 can not only reduce energy losses in the furnace but also prevent the formation of magnesium silicate compounds and increase the purity of MgO in the final product.

کلیدواژه‌ها [English]

• Magnesite Ore
• Enthalpy
• Calcium Oxide
• Silicon Oxide
• Sintering

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