مهندسی شیمی ایران

مهندسی شیمی ایران

لیچینگ همزنی و ستونی مخلوط کان‌سنگ کم‌عیار اکسیدی و سولفیدی مجتمع مس سونگون

نوع مقاله : مقاله پژوهشی

نویسندگان
1 دانشجوی کارشناسی ارشد فراوری مواد معدنی، دانشگاه صنعتی سهند
2 استاد فراوری مواد معدنی، دانشگاه صنعتی سهند، تبریز
3 استادیار اکتشاف مواد معدنی، دانشگاه صنعتی سهند، تبریز
چکیده
این تحقیق با هدف بررسی عوامل تأثیرگذار بر لیچینگ همزنی و ستونی مس از مخلوط کان‌سنگ کم‌عیار اکسیدی و سولفیدی مجتمع مس سونگون انجام‌شد. پس‌از آماده‌سازی و شناسایی نمونه، آزمایش‌های لیچینگ همزنی برای بررسی اثر مشخصه‌های زمان، غلظت اسید سولفوریک و ابعاد ذرات سنگ معدن بر بازیابی مس و میزان مصرف اسید به‌وسیلۀ سنگ معدن در راکتور شیشهای پیرکس انجام‌گرفت. بازیابی مس درمدت‌ زمان 2 ساعت، غلظت اسید 30 گرمبرلیتر، ابعاد ذرات سنگ معدن 75- میکرون به 71/5 درصد رسید. میزان مصرف اسید در شرایط مذکور 84 کیلوگرم بهازای هر تن از سنگ معدن به‌دست‌آمد. آزمایش های لیچینگ ستونی در ستون های با ارتفاع 130 و قطر داخلی 11 سانتی‌متر برای بررسی اثر مشخصه‌های غلظت اسید، دبی پاشش، ابعاد ذرات انجام‌شد. میزان بازیابی مس در ستون‌ها از 44/01 تا 62/11 درصد و بازیابی آهن از 17/73 تا 47/09 درصد متفاوت بود. میزان مصرف اسید به‌وسیلۀ سنگ معدن در ستون‌ها با شرایط مختلف لیچینگ از 31 تا 55 کیلوگرم بهازای هر تن کان‌سنگ به‌دستآمد. بهعلت غالببودن ترکیبات اکسیدی مس در نمونه، در کمتر از 20 روز تقریباً بیشاز 90 درصد مس اکسیدی حل‌‌می‌شود و افزایش زمان لیچینگ موجب افزایش بازیابی آهن در فرایند می‌شود و می‌تواند مشکلاتی در فرایندهای بعدی استحصال مس یعنی استخراج با حلال و الکتروینینگ داشتهباشد.
کلیدواژه‌ها

موضوعات


عنوان مقاله English

Agitation and Column Leaching of Mixed Low Grade Oxide and Sulphide Ore of Sungun Copper Complex

نویسندگان English

َA. Latifi Saray 1
Valeh Aghazadeh 2
M. Faridazad 3
R. Dabbaghi 1
1 MSc. Student in Mineral Processing, Sahand University of Technology
2 Professor of Mineral Processing, Sahand University of Technology
3 Assistant Professor of Mineral Exploration, Sahand University of Technology
چکیده English

This research was conducted with the aim of investigating the influencing factors on column and agitation leaching of copper from a mixture of low-grade oxide and sulphide ores of Sungun copper complex. After sample preparation and identification, agitation leaching experiments were conducted to investigate the effect of time parameters, sulfuric acid concentration and ore particle size on copper recovery and acid consumption by ore in pyrex glass reactor. Copper recovery reached 71.5% in 2 hours, acid concentration 30 g/l, ore particle size -75 microns. The consumption of acid in the mentioned conditions was 84 kg/t ore. Column leaching experiments were carried out in columns with a height of 130 cm and an internal diameter of 11 cm to investigate the effect of parameters of acid concentration, irrigation rate, and ore particle size. The amount of copper recovery in the columns varied from 44.01 to 62.11% and iron recovery from 17.73 to 47.09%. The amount of acid consumption by ore in columns with different leaching conditions was obtained from 31 to 55 kg/t ore. Due to the predominance of copper oxide compounds in the sample, in less than 20 days, almost more than 90% of copper oxide is dissolved and the increase in leaching time increases the recovery of iron in the process and can cause problems in the subsequent copper extraction processes, i.e. solvent extraction and electrowinning.

کلیدواژه‌ها English

Agitation Leaching
Column Leaching
Sulphuric Acid
Mixture of Low Grade Copper
Sungun Copper Complex

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