مجله علوم، مهندسی و فناوری هسته‌ای

بررسی پارامترهای مؤثر بر بازیابی عناصر نادر خاکی از کانسنگ چاه‌گز با استفاده از فرایند فروشویی اسیدی

نوع مقاله : مقاله پژوهشی

نویسنده

محمد رضایی

پژوهشکده چرخه سوخت هسته‌ای، پژوهشگاه علوم و فنون هسته‌ای، سازمان انرژی اتمی ایران، صندوق پستی: 8486-11365، تهران- ایران

https://doi.org/10.24200/nst.2024.1655.2048
چکیده
در این پژوهش، بازیابی عناصر نادر خاکی از کانسنگ چاه‌گز به وسیله فرایند فروشویی اسیدی مورد بررسی قرار گرفته است. همچنین تأثیر پارامترهای مختلف بر روی انحلال عناصر نادر خاکی بررسی گردید. نتایج نشان داد که غلظت اسید، درجه حرارت، اندازه ذرات کانسنگ، نسبت مایع به جامد و زمان فروشویی به ترتیب از عوامل مهم در بازیابی عناصر نادر خاکی از کانسنگ می‌باشند. درصد بازیابی عناصر نادر خاکی در اسید سولفوریک نسبت به اسیدهای دیگر بالاتر بود. افزایش دما تا 85 درجه سانتی‌گراد سبب تسریع در انجام واکنش لیچینگ و افزایش بازیابی عناصر نادر خاکی می‌شود. با افزایش نسبت مایع به جامد تا 2 تماس مؤثر جامد با مایع به دلیل وجود اسید اضافی در محیط واکنش افزایش پیدا می‌کند، در نتیجه میزان شویش عناصر نادر خاکی بیشتر می‌شود. درجه حرارت 85 درجه سانتی‌گراد، زمان 6 ساعت، غلظت اسید سولفوریک 5/1 مولار، نسبت مایع به جامد 2 و اندازه ذرات 150 میکرون در فرایند بهینه فروشویی به دست آمد. در این شرایط، درصد بازیابی عناصر نادر خاکی از کانسنگ چاه‌گز 95درصد بود.

کلیدواژه‌ها

عناصر نادر خاکی
فروشویی
کانسنگ چاه‌گز

عنوان مقاله English

Investigating the effective parameters on the recovery of rare earth elements from Chahgaz ore using acid washing process

نویسنده English

M. Rezaee
Nuclear Fuel Cycle Research School, Nuclear Science and Technology Research Institute, AEOI, P.O.Box: 11365-8486, Tehran - Iran
چکیده English

 
In this research, the recovery of rare earth elements from Chahgaz ore has been investigated through an acid leaching process. The effect of different parameters on the dissolution of rare earth elements was also explored. The results indicated that factors such as acid concentration, leaching temperature, ore particle size, liquid to solid ratio, and leaching time are crucial in recovering rare earth elements from the ore. Specifically, the recovery percentage of rare earth elements in sulfuric acid was found to be higher compared to other acids. Increasing the temperature to 85 degrees Celsius was observed to accelerate the leaching reaction and enhance the recovery of rare earth elements. Moreover, increasing the liquid to solid ratio up to 2 led to improved contact between the solid and liquid phases, as excess acid in the reaction medium facilitated a higher leaching rate of rare earth elements. Optimal conditions for the leaching process were determined to be a temperature of 85 degrees Celsius, a leaching time of 6 hours, a sulfuric acid concentration of 1.5 M, a liquid to solid ratio of 2, and a particle size of 150 microns. Under these conditions, a recovery percentage of 95% for rare earth elements from Chahgaz ore was achieved.

کلیدواژه‌ها English

Rare earth elements
Leaching
Chahgaz ore
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