Fine Particle Classification and Dewatering of Construction Waste Slurry Using Hydrocyclone

Hee-young Shin; Sang-woo Ji; Sanghyeon Choi; Ilhwan Park; Kyoungkeun Yoo; Jay Hyun Park; Richard Diaz Alorro

doi:10.12972/ksmer.2015.52.6.627

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2015 Vol.52, Issue 6 Preview Page Next Page

Technical Report

Fine Particle Classification and Dewatering of Construction Waste Slurry Using Hydrocyclone 습식사이클론을 이용한 건축폐기물 슬러리의 정밀분급과 탈수

31 December 2015. pp. 627-631

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Abstract

The classification and dewatering processes are required to use efficiently slurry generated from recycling processes of construction wastes. The classification tests with 2-inch hydrocyclone were performed using two samples; as-recived one and re-dispersed one in distilled water after filtration, and the effects of pressure and pulp density on the separation efficiency and dewatering were investigated. In the tests with as-recieved sample, the median diameter of underflow product decreased with increasing the pressure, and the diameter was 31.10 ㎛ at 0.3 MPa with 5% pulp density. The dewatering efficiency was higher in the tests with re-dispersed sample than with as-received one, which would be due to foam observed in the classification test. In the case of re-dispersed sample test, the dewatering efficiency increased with increasing pulp density, the water content of underflow product was 48.8% at 0.3 MPa with 8% pulp density.

Keywords

Hydrocyclone

Construction wastes

Dewatering

Fine particle classification

건설폐기물 재활용 공정에서 발생하는 슬러리의 효율적인 이용을 위해 적절한 분급과 탈수공정이 필요하다. 당 연구에서는 건축폐기물 재활용 공정 슬러리와 이를 탈수 후 증류수에 재분산한 시료를 대상으로 2인치 습식사이클론 분급실험을 수행하였고, 주입압력(공급유량)과 광액농도가 분급 및 탈수에 미치는 영향을 조사하였다. 원시료의 분급실험에서 주입압력을 증가시켰을 때, underflow 산물의 평균입도는 감소하여 광액농도 5%, 주입압력 0.3 MPa의 조건에서 31.10 ㎛이었다. 탈수효율은 원시료보다 증류수에 재분산한 경우가 높았는데, 이는 원시료의 분급실험 중 발생하는 기포가 분급효율을 저해하는 것으로 판단되었다. 재분산시료를 사용한 경우 광액농도가 증가할수록 탈수효과가 증가하여 8% 광액농도, 0.3 MPa 조건에서 분급을 실행한 결과 underflow 산물의 함수율은 48.8%이었다.

키워드

습식사이클론

건축폐기물

탈수

정밀분급

References

Bradley, D., 1965, The Hydrocyclone, Pergamon Press, London, UK, pp. 41-62.

Han, C.G., Oh, S.K., Lee, S.T. and Kim, J.J., 2002, “Physical Properties of Planting Concrete Using Recycled Aggrgates,” Journal of the Korea Concrete Institute, Vol. 14, No. 1, pp. 16-23.

Kim, J., Yoo, K., Choi, H., Choi, U.K., Park, J.H., and Alorro, R.D., 2015, “Fine Particle Classification and Dewatering of Tailing Using Hydrocyclone,” Journal of Korean Institute of Resources Recycling, Vol. 24, No. 4, pp. 56-60.

Kim, Y.J. and Chung, M.H., 2012, “Study on the Recycling of the Construction Wastes and Reformation of the System,” Journal of Korea Organic Resources Recycling Association, Vol. 20, No. 2, pp. 27-35.

Wills, B.A. and Napier-Munn, T.J., 2005, Mineral Processing Technology; An Introduction to the Practical Aspects of Ore Treatment and Mineral Recovery, 7^th Ed., Butterworth- Heinemann, Amsterdam, pp. 242-243.

Information

Publisher :The Korean Society of Mineral and Energy Resources Engineers
Publisher(Ko) :한국자원공학회
Journal Title :Journal of the Korean Society of Mineral and Energy Resources Engineers
Journal Title(Ko) :한국자원공학회지
Volume : 52
No :6
Pages :627-631
Received Date : 2015-11-16
Revised Date : 2015-12-08
Accepted Date : 2015-12-17
DOI :https://doi.org/10.12972/ksmer.2015.52.6.627

Journal of the Korean Society of Mineral and Energy Resources Engineers ISSN:2288-0291(Print) 2288-2790(Online) 한국자원공학회지

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