Effect of Galvanic Interactions Between Grinding Media and Sulfide Minerals on Flotation Kinetics of Chalcopyrite

نوع مقاله : علمی-پژوهشی انگلیسی

نویسندگان

1 M.Sc, Dept. of Mining Engineering, Imam Khomeini International University (IKIU), Qazvin, Iran

2 Assistant Professor, Dept. of Mining Engineering, Imam Khomeini International University (IKIU), Qazvin, Iran

3 Associate Professor, Dept. of Mining Engineering, Imam Khomeini International University (IKIU), Qazvin, Iran

چکیده

Although the flotation separation of sulfides and their electrochemical interactions have been examined in some investigations, study the direct relationship between the flotation kinetics of sulfides and their galvanic interactions during the process yet has not been addressed. To fill this gap, an extensive study was conducted to explore the effect of galvanic interactions for chalcopyrite and pyrite on their flotation kinetics when they are wetting ground by three different grinding media types (steel, chromium, and ceramic). Assessment of the flotation test results indicated that there was no galvanic interaction between the ceramic grinding balls and chalcopyrite. The galvanic interactions were mostly related to the grinding of chalcopyrite by steel balls. EDTA analysis showed that by increasing the amount of iron oxy/hydroxy and their precipitations on the surface of chalcopyrite, the recovery of chalcopyrite was decreased. Furthermore, increasing the pyrite content in the flotation of chalcopyrite increased the flotation rate constant and then decreased it. Flotation tests demonstrated that grinding chalcopyrite by ceramic media type, which has lower electrochemical activity in comparison with the other considered media, can be resulted in a higher flotation rate constant and ultimate recovery. Grinding the mixture of chalcopyrite and pyrite by steel or chromium media can show almost the same effect on the flotation rate constant and ultimate recovery. In general, the experimental results showed that by increasing the galvanic interaction, the flotation recovery and flotation kinetics were decreased.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

تاثیر برهمکنش‌های گالوانیکی بین محیط‌های آسیا و کانی‌های سولفیدی بر سینتیک فلوتاسیون کالکوپیریت

نویسندگان [English]

  • المیرا روان آسا 1
  • غلامرضا کریمی 2
  • رحمان احمدی 3
1 کارشناسی ارشد، گروه مهندسی معدن، دانشکده فنی و مهندسی، دانشگاه بین‌المللی امام خمینی (ره)، قزوین
2 استادیار، گروه مهندسی معدن، دانشکده فنی و مهندسی، دانشگاه بین‌المللی امام خمینی (ره)، قزوین
3 دانشیار، گروه مهندسی معدن، دانشکده فنی و مهندسی، دانشگاه بین‌المللی امام خمینی (ره)، قزوین
چکیده [English]

اگرچه جداسازی فلوتاسیون سولفیدها و برهمکنش‌های الکتروشیمیایی آنها در برخی تحقیقات بررسی شده است، اما مطالعه رابطه مستقیم بین سینتیک شناورسازی سولفیدها و برهمکنش‌های گالوانیکی آنها در طول فرآیند هنوز مورد بررسی قرار نگرفته است. برای پر کردن این شکاف، یک مطالعه گسترده برای بررسی اثر برهمکنش‌های گالوانیکی کالکوپیریت و پیریت بر سینتیک شناورسازی آنها هنگام خیس شدن، به وسیله سه نوع آسیاب مختلف (فولاد، کروم و سرامیک) انجام شد. ارزیابی نتایج آزمایش فلوتاسیون نشان داد که هیچ برهمکنش گالوانیکی بین گلوله‌های خردایش سرامیکی و کالکوپیریت وجود ندارد. فعل و انفعالات گالوانیکی بیشتر مربوط به آسیاب کالکوپیریت به وسیله گلوله‌های فولادی بود. آنالیزهای EDTA نشان داد که با افزایش میزان اکسی/هیدروکسی آهن و رسوب آنها بر روی سطح کالکوپیریت، بازیابی کالکوپیریت کاهش یافت. علاوه بر این، افزایش محتوای پیریت در فلوتاسیون کالکوپیریت باعث افزایش ثابت نرخ شناور و سپس کاهش آن شد. آزمایش‌های فلوتاسیون نشان داد که آسیاب کالکوپیریت با نوع محیط سرامیکی که دارای فعالیت الکتروشیمیایی پایین‌تری در مقایسه با سایر محیط‌های در نظر گرفته شده است، به ثابت نرخ شناور بالاتر و بازیابی نهایی منجر می‌شود. آسیاب کردن مخلوط کالکوپیریت و پیریت به وسیله محیط‌های فولادی یا کروم تقریبا همان اثر را روی ثابت نرخ شناورسازی و بازیابی نهایی نشان می‌دهد. به طور کلی نتایج آزمایش‌های انجام ‌شده نشان داد که با افزایش اندرکنش گالوانیکی، بازیابی فلوتاسیون و سینتیک فلوتاسیون کاهش می‌یابد.

کلیدواژه‌ها [English]

  • برهمکنش گالوانیکی
  • گلوله‌های خردایش
  • کالکوپیریت
  • پیریت
  • استخراج EDTA

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سابقه مقاله

  • تاریخ دریافت: 13 مرداد 1400
  • تاریخ بازنگری: 12 بهمن 1400
  • تاریخ پذیرش: 23 دی 1400

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