起泡剂对高灰尾煤泥浮选的影响及机理研究  

Influence of Frothers on Flotation Performance of High-Ash Coal Tailings

作　　者：梁云帆 程伟[1,2,3] LIANG Yunfan;CHENG Wei(Mining College,Guizhou University,Guiyang 550025,Guizhou,China;National&Local Joint Laboratory of Engineering for Effective Utilization of Regional Mineral Resources from Karst Areas,Guiyang 550025,Guizhou,China;Guizhou Key Laboratory of Comprehensive Utilization of Non-metallic Mineral Resources,Guiyang 550025,Guizhou,China)

机构地区：[1]贵州大学矿业学院,贵州贵阳550025 [2]喀斯特地区优势矿产资源高效利用国家地方联合工程实验室,贵州贵阳550025 [3]贵州省非金属矿产资源综合利用重点实验室,贵州贵阳550025

出　　处：《矿冶工程》2024年第4期189-193,共5页Mining and Metallurgical Engineering

基　　金：国家自然科学基金(52364024)。

摘　　要：以贵州某焦煤选厂浮选尾煤泥为研究对象,考察了甲基异丁基甲醇(MIBC)、仲辛醇、2号油、正戊醇等起泡剂对浮选尾煤泥再选提质的影响及作用机理。结果表明,用量相近时,MIBC为起泡剂所获得的浮选指标优于其他3种起泡剂。煤油用量1000 g/t、MIBC用量350 g/t时,灰分56.90%的原煤经一粗一精一扫浮选可获得灰分11.47%、产率32.03%的合格炼焦精煤产品。利用充气法研究了4种起泡剂的起泡能力及泡沫稳定性,发现2号油起泡能力和气泡稳定性均较强,正戊醇起泡能力和气泡稳定性均较弱,MIBC和仲辛醇表现适中。利用气泡-颗粒包覆角及诱导时间测量仪进一步分析了不同起泡剂作用下气泡与煤粒黏附作用过程,发现MIBC可以提升气泡的载矿能力,缩短颗粒与气泡间的诱导时间,从而获得较好的浮选效果。With the coal tailings from the flotation process of a coking coal preparation plant in Guizhou as the research object,the effects of four kinds of frother including methyl isobutyl methanol(MIBC),sec-octyl alcohol,terpenic oil and n-pentanol on the flotation performance of coal tailings were investigated.The test shows that the flotation indices of MIBC frother were better than those of the other three frothers with the similar dosage.A flotation process consisting of one stage of roughing,one stage of cleaning and one stage of scavenging was adopted to treat the raw coal with the ash content of 56.90%,and with dosages of kerosene and MIBC respectively at 1000 g/t and 350 g/t,a qualified coking coal with the ash content of 11.47%and the yield of 32.03%can be produced.The results of foaming ability and foam stability measured by inflation method show that the foaming ability and foam stability of terpenic oil are the strongest,while those indices of n-pentanol are relatively weak,and those of MIBC and sec-octyl alcohol moderate.The characterization of the adhesion process between bubbles and coal particles under the action of different frothers analyzed with bubble-particle encapsulation angle and induction time measuring instrument suggests that MIBC can enhance coal-carrying capacity of bubbles,shorten particle-bubble induction time,thus bringing improved flotation effect.

关 键 词：焦煤 尾煤 煤泥浮选 起泡剂 起泡能力 包覆角 诱导时间 

分 类 号：TD923[矿业工程—选矿]