煤泥浮选过程强化之四——易浮难选煤泥浮选过程特征篇  

Fine coal flotation process intensification:Part 4-Characteristics of easily floatable hard-to-separate fine coal flotation process

作　　者：桂夏辉[1] 邢耀文[2] 王英伟[2] 徐梦迪[2] 

机构地区：[1]中国矿业大学国家煤加工与洁净化工程技术研究中心,江苏徐州221116 [2]中国矿业大学化工学院,江苏徐州221116

出　　处：《选煤技术》2017年第4期92-97,共6页Coal Preparation Technology

基　　金："十二五"国家科技支撑计划(2014BAB01B03);国家自然科学基金面上项目(51574236;51774286);贵州省"12.5计划"重大科技专项(黔(2013)026);中国博士后基金特别资助项目(2015T80606);中国博士后基金面上项目(2014M550317)

摘　　要：为了研究易浮难选煤泥的浮选过程特征,以乌海矿区和开滦矿区的焦煤煤泥作为代表性煤样,通过试验研究其浮选动力学,采用X射线光电子能谱和红外光谱检测煤样表面含氧官能团的分布,借助Fuerstenua提质曲线对煤样的浮选选择性进行定量评价。研究结果表明:乌海煤样中间粒级的选择性最差,而细粒级选择性较好;开滦煤样中的0.25~0.125、0.125~0.074、<0.074 mm三个粒级的选择性依次降低,随着煤泥粒度的减小,同一粒级中不同密度级的亲水性指数差值变小,这是易浮难选煤泥难选的根本原因。For investigation of the characteristics of easy-to-float yet hard-to-separate fine coal flotation process, quantitative evaluation is made of the flotation selectivity of the representative fine coking coal samples collected from Wuhai and Kailuan mining areas, through experimental study of kinetics, determi- nation of distribution of oxygen-containing functional groups on sample surface using X-ray photoelectron spectroscopic and infrared spectroscopic methods, and by reference to Fuerstenua upgrading curve. As indicated by test result, for the Wuhai sample, in terms of selectivity, the medium size fractions are the poorest while the finer size fractions are much better; with respect to the Kailuan sample, the three size fractions--0. 025 -0. 125 mm, 0. 125 - 0. 074 mm and 〈 0. 074 ram--become sequentially smaller in selectivity ; with the decrease of size, the different density fractions in the same size fraction become smal- ler in difference of hydrophilicity index, this constituting the root cause underlying the difficulty in flota- tion of easy-to-float hard-to-separate fine coal.

关 键 词：浮选过程特征 易浮难选煤泥 亲水性指数 乌海矿区 开滦矿区 焦煤煤泥 

分 类 号：TD943[矿业工程—选矿]