Enhancing flotation recovery of residual carbon from gasification waste by mixing hydrophobic powder with diesel as collector
作者机构：College of Chemistry and Chemical EngineeringXi’an University of Science and TechnologyXi’anShaanxi 710054China
出 版 物：《Particuology》 (颗粒学报（英文版）)
年 卷 期：2024年第89卷第6期
页 面：211-217页
核心收录：
学科分类：081704[工学-应用化学] 07[理学] 070304[理学-物理化学(含∶化学物理)] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学]
基 金：supported by the Natural Science Foundation of Shaanxi Province(grant No.2023-YBGY-055) the National Natural Science Foundation of China(grant No.52004212,and 52374279) the Qinchuangyuan High-level Innovation and Entrepreneurship Talent Program(grant No.QCYRCXM-2023-054)
主 题：Coal gasification fine slag Carbon recovery Collector Fotation Hydrophobic powder
摘 要：Coal gasification fine slag(CGFS)is a solid waste containing residual carbon and ash generated during the coal gasification process,and the separation of the two components is the essential way to realize its environmental pollution reduction and resource value *** flotation is the preferred method for separating CGFS,but there is a barrier of low carbon recovery in this process due to the extensive adsorption of collector by the well-developed pores on residual *** this study,a sufficiently simple yet innovative collector,a mixture of hydrophobic powder and diesel,was proposed in an attempt to break the *** experiments with common diesel and this novel collector were performed respectively,and FTIR,XPS,and SEM-EDX were employed to analyze the collector action *** results revealed that the novel collector could significantly improve the residual carbon recovery;test results demonstrated that the novel collector could increase the hydrophobic functional group content on the fine slag surface,and the hydrophobic powders in this novel collector mainly appeared at the pore openings of the flotation *** essence of the mechanism is that the hydrophobic powders play a dual role of blocking pores and providing adsorption sites,thus facilitating the spreading of diesel on the carbon surface and promoting its *** study can provide creative ideas for the efficient disposal of coal gasification waste.
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