摘要
以枣庄某煤化工企业煤气化细渣为研究对象,通过泡沫浮选进行了煤气化细渣碳灰分离的试验研究,并对原料样品以及得到的浮选产品进行了XRD、FTIR、SEM扫描电镜、压汞和氮气吸脱附测试等表征分析。结果表明,0.125 mm粒级为样品的灰分分界点,<0.125 mm被作为浮选入料,当煤油用量16 kg/t、MIBC用量12 kg/t时,精矿产品的可燃体回收率和浮选完善度分别为97.21%和44.68%,尾矿产品灰分和产率分别为96.63%和35.99%,浮选碳灰分离过程药耗量大。同时0.045 mm作为主导粒级灰分较高,浮选产品质量和浮选效果也受到高灰细泥夹带的影响。煤气化细渣样品中存在大量复杂的孔隙结构且存在碳灰嵌布现象影响浮选产品质量,浮选入料和浮选精矿具有较高的比表面积和发达的孔隙结构,造成较高的浮选药耗量;样品中的亲水基团和与残碳嵌布的无机矿物相可能减弱了气化细渣的浮选矿化效果,造成样品碳灰分离效果差,进而需要更高的药剂添加量来提升浮选效果。
This study in Zaozhuang coal chemical enterprise coal gasification slag as the research object,the sample of industrial analysis,particle size analysis and other test processing,through the foam float coal gasification slag carbon ash separation test study,and the raw material samples and flotation products obtained XRD,FTIR,SEM,pressure mercury and nitrogen absorption test characterization analysis.Sample treatment and flotation results show that 0.125 mm is the ash cut-off point of the sample,and<0.125 mm is used as the flotation material.When the kerosene amount is 16 kg/t and MIBC amount is 12 kg/t,the combustible body recovery rate and flotation perfection of concentrate products were 97.21%and 44.68%the tailings ash is 96.63%,the yield is 35.99%,and the separation process of flotation carbon ash is large.At the same time,0.045 mm serves as the dominant grain level ash content is high,and the flotation product quality and flotation effect are also affected by the high ash and fine mud entrainment.The characterization analysis shows that there are a large number of complex porestructure in coal gasification fine slag samples and carbon ash embedded phenomenon affects thequality of flotation products.Feed and concentrate have high specific surface area and developed pore structure,resulting in high flotation consumption;the hydrophilic group in the samples and inorganic mineral embeddedwith residual carbon may weaken the floatation effect of gasification fine slag,resulting in poor separation effect of carbon ash,thus a higher agent addition is needed to improve the flotation effect.
作者
赵振洋
邱燕琳
李鑫
梁艳男
周若谦
ZHAO Zhenyang;QIU Yanlin;LI Xin;LIANG Yannan;ZHOU Ruoqian(School of Chemical Engineering,China University of Mining and Technology,Xuzhou 221116,China;National Coal Processing and Cleaning Engineering Technology Research Center,China University of Mining and Technology,Xuzhou 221116,China;Shanxi Zhongboda Construction Engineering Co.,Ltd.,Jincheng 048001,China)
出处
《煤炭技术》
CAS
北大核心
2023年第11期256-260,共5页
Coal Technology
基金
国家自然科学基金联合基金项目(YLU-DNL Fund 2021005)。
关键词
气化细渣
泡沫浮选
碳灰分离
药耗量
孔隙结构
coal gasification fine slag
foam flotation
carbon ash separation
drug consumption
pore structure
