Bioleaching of a low grade sphalerite concentrate produced from flotation tailings

  • سال انتشار: 1395
  • محل انتشار: مجله بین المللی معدن و مهندسی زمین، دوره: 50، شماره: 2
  • کد COI اختصاصی: JR_IJMGE-50-2_003
  • زبان مقاله: انگلیسی
  • تعداد مشاهده: 417
دانلود فایل این مقاله

نویسندگان

Javad Mehrabani

Department of Mining Engineering, Sahand University of Technology, Tabriz, Iran

Seyyed Ziaadin Shafaei

School of Mining Engineering, College of Engineering, University of Tehran, Tehran, Iran

Mohammad Noaparast

School of Mining Engineering, College of Engineering, University of Tehran, Tehran, Iran

S.M Mousavi

Biotechnology Group, Chemical Engineering Department, Tarbiat Modares University, Tehran, Iran

چکیده

In this research work, the zinc extraction was investigated, using bioleaching process from a low grade zinc concentrate which was produced from the accumulated flotation tailings. Zinc content was initially upgraded to 11.97% by flotation process. Bioleaching experiments were designed and carried out by a mixed culture of Acidithiobacillus ferrooxidans, Acidithiobacillus thiooxidans, Leptospirilium ferrooxidans, as well as a mixed moderate thermophile bacteria in the shake flasks. Effect of two types bacteria, indigenous bacteria accompany by concentrate sample, and added mixture of bacteria were evaluated. The term of indigenous bacteria refers to the bacteria which initially exist in the natural concentrate sample. The results showed that more than 87% and 94% of Zn was dissolved in the bioleaching condition of mesophile and moderate thermophile bacteria, respectively. Comparing bioleaching and leaching tests indicated that mesophile bacteria improved Zn extraction 36%, in which contribution of concentrate indigenous bacteria (test condition of non-inoculation) and added mesophile mixed bacteria were equal to 34% and 66% of that improvement, respectively. In addition, moderate thermophile bacteria improved sphalerite leaching up to 38% in which contribution of concentrate indigenous bacteria and added moderate bacteria were about 50% separately.

کلیدواژه ها

Bioleaching, Pyrite, Tailing, Sphalerite concentrate

مقالات مرتبط جدید

اطلاعات بیشتر در مورد COI

COI مخفف عبارت CIVILICA Object Identifier به معنی شناسه سیویلیکا برای اسناد است. COI کدی است که مطابق محل انتشار، به مقالات کنفرانسها و ژورنالهای داخل کشور به هنگام نمایه سازی بر روی پایگاه استنادی سیویلیکا اختصاص می یابد.

کد COI به مفهوم کد ملی اسناد نمایه شده در سیویلیکا است و کدی یکتا و ثابت است و به همین دلیل همواره قابلیت استناد و پیگیری دارد.