粒度分布对赤铁矿浮选的影响

以赤铁矿为研究对象,通过浮选试验、扩展的DLVO(EDLVO)理论和凝聚动力学研究了粒度分布(粒径小于18μm的微细粒比例)对赤铁矿浮选的影响.浮选结果表明赤铁矿的浮选回收率与粒度的大小和分布有关,粗粒(粒径大于18μm)赤铁矿的粒度较大时或粒度分布均衡时(微细粒与粗粒含量接近)浮选回收率较高.EDLVO理论计算表明微细粒赤铁矿与粗粒赤铁矿之间存在吸引力,且吸引力的大小与粗粒粒度正相关;凝聚动力学分析表明粒度分布均衡时颗粒间的凝聚速率较大.这是粒度分布对赤铁矿的浮选回收率产生影响的主要原因....

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Published in东北大学学报(自然科学版) Vol. 37; no. 6; pp. 865 - 868
Main Author 李东 印万忠 马英强 姚金
Format Journal Article
LanguageChinese
Published 福州大学紫金矿业学院,福建福州 350108%福州大学紫金矿业学院,福建福州,350108 2016
东北大学资源与土木工程学院,辽宁沈阳,110819%东北大学资源与土木工程学院,辽宁沈阳 110819
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ISSN1005-3026
DOI10.3969/j.issn.1005-3026.2016.06.022

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Summary:以赤铁矿为研究对象,通过浮选试验、扩展的DLVO(EDLVO)理论和凝聚动力学研究了粒度分布(粒径小于18μm的微细粒比例)对赤铁矿浮选的影响.浮选结果表明赤铁矿的浮选回收率与粒度的大小和分布有关,粗粒(粒径大于18μm)赤铁矿的粒度较大时或粒度分布均衡时(微细粒与粗粒含量接近)浮选回收率较高.EDLVO理论计算表明微细粒赤铁矿与粗粒赤铁矿之间存在吸引力,且吸引力的大小与粗粒粒度正相关;凝聚动力学分析表明粒度分布均衡时颗粒间的凝聚速率较大.这是粒度分布对赤铁矿的浮选回收率产生影响的主要原因.
Bibliography:LI Dong YIN Wan-zhong, MA , Ying-qiang , YAO Jin (1. School of Resources & Civil Engineering, Northeastern University, Shenyang 110819, China; 2. College of Zijin Mining, Fuzhou University, Puzhou 350108, China. )
21-1344/T
fine particles; hematite; flotation; sodium oleate; particle size distribution
Effects of the content of fine fractions ( 〈 18 Ixm) on hematite flotation were studied by using flotation tests, extended DLVO (EDLVO) theoretical calculations and kinetics of particle aggregation. The flotation results indicate that hematite recovery is related with the size of coarse particle ( 〉 18 Ixm) and particle size distribution. When the size of coarse particle is relatively large, the recovery of hematite is high. EDLVO theoretical calculations confirm that the fine particles could interface with the coarse particles and the attraction energy increases with the coarse particle size increasing. The flotation recovery increases with the particle size distribution becoming balance (the fine fractions equals
ISSN:1005-3026
DOI:10.3969/j.issn.1005-3026.2016.06.022