摘要
气含率是柱浮选中最关键的参数之一,它直接影响整个柱浮选过程。采用液位上升法和电导法研究了表观气速(Jg)、表观液速(UL)、正辛醇浓度(C)和充填介质数(λ)对水平充填介质浮选柱的整体气含率、局部气含率及其分布的影响。结果表明,C=0 g/L,Jg从0.53 cm/s增加到2.65 cm/s时,气含率增加4倍;Jg=0.53 cm/s,C从0 g/L增加到0.1 g/L时,气含率增加7倍;Jg=2.65 cm/s,充填介质数从0增加到5时,浮选柱整体气含率增加59.4%;充填介质可以减小气泡的紊动强度,使气含率沿径向和轴向分布更加均匀。
Gas hold-up is one of the key parameters during the flotation of column flotation, and it directly influences the whole flotation process. The influence of superficial gas velocity （Jg）, superficial liquid velocity （U1）, octanol dosage （C） and the number of packing materials （λ） on the gas hold-up, local gas hold-up and its distribution were studied using level rise method and conductivity method. It was found that the total gas hold up increased by four times when Js increased from 0.53 cm/s to 2.65 cm/s. Total gas hold-up increased by seven times when increased from 0 g/L to 0.1 g/L. Without adding octanol, keeping superficial gas velocity being 2.65 cm/s, the packing materials would increase the gas hold-up by 59.4%. Meanwhile, packing materials reduce turbulence intensity of bubbles and make the radial and axial distribution of gas hold-up more uniformity.
出处
《有色金属（选矿部分）》
CAS
北大核心
2014年第2期65-69,共5页
Nonferrous Metals（Mineral Processing Section）
基金
国家重点基础研究发展计划(973计划)资助项目(2007CB613602)
关键词
浮选柱
水平充填介质
气含率
表观气速
flotation column
horizontal packing materials
gas hold-up
superficial gas velocity
