Study of the effect of airflow rate and agitation speed on entrainment of ash particles in bottom ash flotation

• Autorzy: Kim Minsik , You Kwangsuk , Kim Kwanho , Jeon Yong-woo

Identyfikatory

DOI

10.37190/ppmp/187835

• Języki publikacji: EN

Abstrakty

EN

To enhance the recovery and grade of the final product, reducing the entrainment of the hydrophilic particles during flotation is critical. We conducted the improvement of entrainment to reduce the amount of ash in the concentrate with the purpose of recovering high-quality unburned carbon from the bottom ash and reusing it as fuel in power plant. In this study, we investigated the effects of airflow rate and agitation speed on the entrainment of hydrophilic particles. In the selfaerating flotation machine, it was difficult to independently control the agitation speed and airflow rate, resulting in the degree of entrainment of 0.74. By independently controlling the airflow in which hydrophobic particles can float under conditions of the degree of entrainment with 0.7 (low agitation speed: 900 rpm), the combustible recovery and unburned carbon content of concentrate were 93.71% and 93.60%, respectively. The degree of entrainment was found to be 0.57, and entrainment could be minimized through independent control of airflow rate and agitation speed. To minimize entrainment, it is effective to inject air that can suspend hydrophobic particles in a low agitation speed condition.

Słowa kluczowe

EN

flotation; entrainment; airflow rate; bottom ash

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Physicochemical Problems of Mineral Processing
• Rocznik: 2024
• Tom: Vol. 60, iss. 2
• Strony: art. no. 187835
• Opis fizyczny: Bibliogr. 23 poz., rys., tab., wykr.

Twórcy

autor

Kim Minsik

• Mineral Processing & Metallurgy Research Center, Resources Utilization Division, Korea Institute of Geoscience and Minera Resources (KIGAM), 124 Gwahak-ro, Yuseong-gu, Daejeon 34132, Republic of Korea

autor

You Kwangsuk

• Mineral Processing & Metallurgy Research Center, Resources Utilization Division, Korea Institute of Geoscience and Minera Resources (KIGAM), 124 Gwahak-ro, Yuseong-gu, Daejeon 34132, Republic of Korea

autor

Kim Kwanho

• Mineral Processing & Metallurgy Research Center, Resources Utilization Division, Korea Institute of Geoscience and Minera Resources (KIGAM), 124 Gwahak-ro, Yuseong-gu, Daejeon 34132, Republic of Korea

autor

Jeon Yong-woo

• Environmental Technology Division, Korea Testing Laboratory, 87 Digital-ro 26-gil, Guro-gu, Seoul 08389, Republic of Korea

Bibliografia

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