بازیابی روی از غبار کوره ی قوس الکتریکی به کمک کربن و فروسیلیسیم

نوع مقاله : علمی و پژوهشی

نویسندگان

• محسن موسوی نژاد ¹
• احد ضابط ²

¹ مجتمع آموزش عالی گناباد

² دانشگاه فردوسی مشهد

10.22067/ma.v30i2.59564

چکیده

در این تحقیق، یک فرایند دو مرحله­ای برای بازیابی روی از غبار کوره­ی قوس الکتریکی به کمک کربن و فروسیلیسیم ارائه شده است. نتایج نشان می­دهد که جایگزینی کربن با مقدار کافی از سیلیسیم باعث تشکیل سرباره مذاب شده و نرخ احیاء را تا سه برابر افزایش داده است. نتـــایج همچنین نشان می­دهد دمای موضعی نمونه­ها در اثر انجام واکنش­های گرمازای سیلیکوترمی تا 1100 درجه سانتیگراد افزایش می­یابد. نتیجه­گیری می­شود فاز مذاب سرباره سینتیک فرایند احیاء را از دو طریق افزایش می­دهد. اول از طریق انحلال جزئی کربن  که منجر به انجام واکنش های احیاء به صورت همگن در یک فاز می­گردد. دوم با فراهم نمودن فصل مشترک گسترده بین اکسیدهای فلزی و مواد احیاء­کننده.

کلیدواژه‌ها

• غبار کوره قوس الکتریکی
• بازیابی روی
• احیای کربوترمی
• فروسیلیسیم
• سرباره

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عنوان مقاله [English]

Zinc Recovery from Electric Arc Furnace Dust Using Carbon and Ferrosilicon

نویسندگان [English]

• mohsen moosavi nezhad ¹
• ahad zabett ²

¹ Gonabad Univerity

² Ferdowsi University of Mashhad

چکیده [English]

In this research, a two-step process for recovery of zinc from electric arc furnace dust using carbon and ferrosilicon has been introduced. Results show that substitution of carbon by sufficient amounts of silicon leads to the formation of liquid slag and improves the rate of reduction up to three times. Results also show that local temperature of samples increases up to 1100 °C as a result of exothermic silicothermic reduction reactions. It was concluded that the molten slag phase improves the kinetics of the process by two ways. First by partial dissolution of carbon which leads to the occurring reduction reactions homogenously in the liquid phase. Second by providing extensive interfacial area between the metal oxides and reductants.

کلیدواژه‌ها [English]

• Electric Arc Furnace Dust
• Zinc recovery
• carbothermic reduction
• Ferrosilicon
• Slag

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