بررسی سینتیک انحلال کالکوپیریت در حضور مایع یونی اسیدی

نوع مقاله : علمی-پژوهشی

نویسندگان

1 دانشجوی دکترا، دانشکده مهندسی معدن، پردیس دانشکده‌های فنی، دانشگاه تهران، تهران

2 دانشیار، دانشکده مهندسی معدن، پردیس دانشکده‌های فنی، دانشگاه تهران، تهران

3 استاد، دانشکده مهندسی معدن، پردیس دانشکده‌های فنی، دانشگاه تهران، تهران

چکیده

امروزه پذیرش فناوری‌های سبز و توسعه پایدار توجه بیشتری را در صنعت متالورژی به خود معطوف کرده است. در همین راستا، لیچینگ کنسانتره کالکوپیریت با استفاده از مایع یونی 1-بوتیل-3-متیل-ایمیدازولیوم هیدروژن سولفات (BmimHSO4) در این تحقیق مورد بررسی قرار گرفت. اثر پارامترهایی همچون دما، غلظت مایع یونی BmimHSO4، غلظت هیدروژن پراکسید، نسبت جامد به مایع و اندازه ذرات بر روی نرخ انحلال کالکوپیریت بررسی شد. نتایج به دست آمده نشان داد، غلظت هیدروژن پراکسید بیشترین تاثیر و دما کمترین تاثیر را بر روی نرخ انحلال کالکوپیریت دارند. همچنین تحت شرایط،  غلظت مایع یونی BmimHSO4 40%، غلظت هیدروژن پراکسید 30%، دما 40 درجه سانتی‌گراد، نسبت جامد به مایع 10 گرم بر لیتر، اندازه ذرات زیر 37 میکرون و زمان ماند 180 دقیقه استحصال مس بیش از 97 درصد به دست آمد. بررسی مطالعات سینتیکی نیز با استفاده از مدل هسته کوچک شونده نشان داد مکانیزم فرآیند لیچینگ کالکوپیریت با استفاده از مایع یونی BmimHSO4  از مکانیزم شیمیایی پیروی می‌کند. همچنین مرتبه واکنش نسبت به غلظت BmimHSO4، غلظت H2O2، نسبت جامد به مایع و اندازه ذرات به ترتیب 5386/0، 933/0، (676/0-) و (1078/1-) محاسبه شد. در این شرایط انرژی فعال‌سازی و ثابت آرنیوس نیز به ترتیبkJ/mol  63/46 و 106×2596/0 به دست آمد.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Kinetics Investigation of Chalcopyrite Dissolution in the Presence of Acidic Ionic Liquid

نویسندگان [English]

  • Y. Moazzami 1
  • M. Gharabaghi 2
  • S.Z. Shafaei 3
1 Ph.D Student, School of Mining Engineering, College of Engineering, University of Tehran, Tehran, Iran
2 Associate Professor, School of Mining Engineering, College of Engineering, University of Tehran, Tehran, Iran
3 Professor, School of Mining Engineering, College of Engineering, University of Tehran, Tehran, Iran
چکیده [English]

Today, the adoption of green technologies and sustainable development has dragged more attention in the metallurgical industry. Accordingly, in this study, the leaching kinetics of chalcopyrite (CuFeS2) concentrate using 1-Butyl-3-methylimidazolium hydrogen sulfate (BmimHSO4) as an acidic ionic liquid was investigated. Effects of operational parameters including temperature, BmimHSO4 concentration, H2O2 concentration, solid-to-liquid ratio and particle size on the rate of copper dissolution from CuFeS2 were systematically examined. The results showed that the concentration of hydrogen peroxide and temperature had the greatest and the least effect on the dissolution of chalcopyrite, respectively. Also, the highest Cu extraction (ca. 97%) in this work was achieved using 40% BmimHSO4, 30% H2O2, and 10 g/L solid to liquid ratio for particle sizes less than 37 µm and 45 °C for leaching time of 180 min. Kinetics study using Shrinking Core Model (SCM) revealed that CuFeS2 leaching process using BmimHSO4 follows the chemical reaction-controlled process. In addition, the orders of reaction with respect to BmimHSO4 and H2O2 concentration, solid to liquid ratio, particle size were estimated to be 0.5386, 0.933, -0.676 and -1.1078, respectively. Under these circumstances, the activation energy and Arrhenius constant were 46.63 kJ/mol and 0.2596×106, respectively.

کلیدواژه‌ها [English]

  • Ionic liquids
  • Leaching kinetics
  • Chalcopyrite concentrate
  • Hydrogen peroxide
  • Shrinking Core Model

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سابقه مقاله

  • تاریخ دریافت: 26 بهمن 1400
  • تاریخ بازنگری: 30 آبان 1401
  • تاریخ پذیرش: 30 مرداد 1401

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