The Studies of Collision and Attachment Angles on Coarse Particles Flotation
Impeller speed and air flow rate are two influence parameters on coarse particles flotation and collision and attachment angles. So, in this research recovery of quartz particles at four diameter classes carried out and collision and attachment angles investigated.It is found that maximum flotation response was observed at Impeller speed of 1100 rpm and 15 L/h air flow rate. For either more quiescent (Impeller speed＜1100 rpm) or more turbulent conditions,flotation recovery decreased steadily. Furthermore, amount of attachment probabilities is calculated using suitable equation.According to this study, with decreasing particle size, air flow rate and impeller speed, probability of attachment increased and with increasing contact angle, probability of attachment increased.For various air flow rates, impeller speed and particle size, collision angle has been calculated.Maximum collision angle obtained at 72.82° with 15 L/h air flow rate, particle size of 256 μm and impeller speed of 700 rpm and minimum collision angle obtained at 64° with 45 L/h air flow rate, particle size of 545μm and impeller speed of 1300 rpm. In this study, maximum attachment angle, θcr, was 39.33° around 75 L/h air flow rate, particle size of 256 μm, contact angle of 90°and impeller speed of 1300 rpm and minimum attachment angle was 0.13° with 15 L/h air flow rate, particle size of 545 μm, contact angle of 60° and impeller speed of 1300 rpm.
Coarse particle Attachment Probability Collision angle Attachment angle and Quartz
B. Rezai B. Shahbazi S. M. Javad Koleini
Mineral Processing Dept., Tarbiat Modarres University, Tehran, Iran
国际会议
XXIV International Mineral Processing Congress(第24届国际矿物加工大会)
北京
英文
360-366
2008-09-24（万方平台首次上网日期，不代表论文的发表时间）