摘要
研究了微细粒辉钼矿在煤油、柴油和XM31等3种油类捕收剂体系下的浮选行为,并通过红外光谱分析、界面相互作用计算等手段揭示了油类捕收剂与微细粒辉钼矿的作用机理。结果表明,新型油类捕收剂XM31在水中的分散能力优于煤油和柴油;在pH=2-11范围内,XM31对微细粒辉钼矿的团聚捕收效果也优于煤油和柴油;3种油类捕收剂均主要以物理吸附形式与微细粒辉钼矿发生作用。界面相互作用计算结果表明,在水介质中油类捕收剂与微细粒辉钼矿之间存在范德华引力,但起团聚捕收作用的主要因素是由Lewis酸碱相互作用造成的疏水引力;根据疏水引力大小判断,油类捕收剂在辉钼矿表面上的吸附强度大小顺序为煤油>柴油> XM31。浮选实验结果表明,辉钼矿在3种捕收剂体系下的回收率高低顺序为XM31>柴油>煤油,说明油类捕收剂在矿浆中的分散能力比其在矿物表面的吸附强度对辉钼矿浮选指标的影响更大。
In the presence of hydrocarbon oil collectors such as kerosene,diesel oil and XM31,the flotation behavior of fine molybdenite ore were investigated.The reaction mechanism of these collectors on molybdenite ore was studied by infrared spectroscopy analysis and interfacial interaction calculations.The results show that XM31 possesses better dispersibility in water than kerosene and diesel oil.Within the pH range of 2-11,XM31 exhibits better agglomeration flotation performance than kerosene and diesel oil in collecting fine molybdenite.The reaction of these three collectors on molybdenite is mainly of physical adsorption mechanism.Interfacial interaction calculations indicate that there exists Van der Waals force between molybdenite and these collectors,yet,the strong attractive hydrophobic force caused by Lewis acid-base interaction plays the main role in collecting molybdenite.According to the intensity of hydrophobic attraction,the interaction strength between these collectors and molybdenite follows the order of kerosene>diesel oil>XM31.Nevertheless,the flotation results indicate that the floatability of molybdenite in the presence of these collectors is ranked in a descending order:XM31>diesel oil>kerosene.Furthermore,it is the collector dispersibility,rather than the collector-ore interaction strength,that has greater influence on the flotation performance of fine molybdenite ore.
作者
林清泉
吴启明
戴智飞
曾令明
林智炜
LIN Qing-quan;WU Qi-ming;DAI Zhi-fei;ZENG Ling-ming;LIN Zhi-wei(Jiangxi Copper Corporation Limited,Nanchang 330096,Jiangxi,China;Jiangxi Copper Technology Research Institute Co Ltd,Nanchang 330096,Jiangxi,China;Dexing Copper Mine,Jiangxi Copper Corporation Limited,Shangrao 334224,Jiangxi,China)
出处
《矿冶工程》
CAS
CSCD
北大核心
2021年第3期37-41,45,共6页
Mining and Metallurgical Engineering
基金
中国博士后科学基金面上资助项目(2019M652284)
江西省博士后科研择优资助项目(2018KY18)。
关键词
辉钼矿
微细粒
浮选
机理
油类捕收剂
界面相互作用
疏水引力
molybdenite
fine grain
flotation
mechanism
hydrocarbon oil collector
interfacial interaction
hydrophobic attraction
