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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 16    No. 1    February 2006

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Effects of impeller speed and aeration rate on flotation performance of sulphide ore
YANG Xiao-sheng(杨小生)1, ALDRICH Chris2

1. Institute of Mineral Engineering, Northeastern University, Shenyang 110004, China;
2. Department of Process Engineering, University of Stellenbosch, Private Bag X1,
Matieland, Stellenbosch 7602, South Africa Received 18 April 2005; accepted 5 July 2005

Abstract:The effects of aeration rate and impeller speed on the concentrate sulfur grade and recovery for batch flotation of a complex sulphide ore were investigated. The relationships between the water recovery and solid entrainment were discussed. It is found that the solid entrainment is linearly related to the water recovery regardless of aeration rate and impeller speed, and the higher sulfur recovery at the aeration rate of 2 and 4 L/min for the impeller speed of 1 500 r/min is considered to be the contribution of true flotation. Finally, the sulfur recovery flux is correlated with the bubble surface area flux based on the froth image at the different aeration rates and impeller speeds.

 

Key words: impeller speed; aeration rate; water recovery; solid entrainment

ISSN 1672-7029
CN 43-1423/U

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