Sustainable strategy for high-efficiency flotation of fine low-rank coal: Eco-friendly composite collector prepared from waste oil

IF 4.5 2区工程技术 Q2 ENGINEERING, CHEMICAL

Powder Technology Pub Date : 2024-10-13 DOI:10.1016/j.powtec.2024.120360

Xi-guang Li , Qiang Gao , Chun-chen Nie , Xiang-nan Zhu , Yong-qiang Zhao

引用次数: 0

Abstract

This study prepared an innovative composite collector of waste oil (WO) in kitchen waste, suitable for fine low-rank coal (LRC) flotation. It systematically investigated the potential of the composite collector to recover clean coal from fine LRC by froth flotation. The flotation mechanism of fine LRC particles could be elucidated by the combination of FTIR and XPS. The flotation results demonstrated that the WO composite collector significantly increased the yield and combustible recovery of the fine LRC flotation concentrate. Notably, as the dosage of the WO composite collector increased from 200 to 1000 g/t, the clean coal yield rose from 20.08 % to 74.60 %, while the combustible recovery improved from 24.89 % to 91.19 %. FTIR and XPS analyses indicated that the WO composite collector containing C-H/C-C groups adhered to the surface of the coal particles, which enhanced the hydrophobicity of the particles and improved the flotation efficiency.

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低阶细煤高效浮选的可持续战略：利用废油制备环保型复合捕收剂

本研究制备了一种创新的厨余废油（WO）复合捕收剂，适用于低阶精煤（LRC）浮选。它系统地研究了该复合捕收剂通过泡沫浮选从细低阶煤中回收精煤的潜力。结合傅立叶变换红外光谱和 XPS，阐明了细小低阶煤颗粒的浮选机理。浮选结果表明，WO 复合捕收剂显著提高了细粒沥青还原渣浮选精矿的产率和可燃物回收率。值得注意的是，随着 WO 复合捕收剂用量从 200 克/吨增加到 1000 克/吨，精煤产率从 20.08% 提高到 74.60%，可燃物回收率从 24.89% 提高到 91.19%。傅立叶变换红外光谱和 XPS 分析表明，含有 C-H/C-C 基团的 WO 复合捕收剂附着在煤颗粒表面，增强了颗粒的疏水性，提高了浮选效率。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Powder Technology 工程技术-工程：化工

CiteScore

9.90

自引率

15.40%

发文量

1047

审稿时长

46 days

期刊介绍： Powder Technology is an International Journal on the Science and Technology of Wet and Dry Particulate Systems. Powder Technology publishes papers on all aspects of the formation of particles and their characterisation and on the study of systems containing particulate solids. No limitation is imposed on the size of the particles, which may range from nanometre scale, as in pigments or aerosols, to that of mined or quarried materials. The following list of topics is not intended to be comprehensive, but rather to indicate typical subjects which fall within the scope of the journal's interests: Formation and synthesis of particles by precipitation and other methods. Modification of particles by agglomeration, coating, comminution and attrition. Characterisation of the size, shape, surface area, pore structure and strength of particles and agglomerates (including the origins and effects of inter particle forces). Packing, failure, flow and permeability of assemblies of particles. Particle-particle interactions and suspension rheology. Handling and processing operations such as slurry flow, fluidization, pneumatic conveying. Interactions between particles and their environment, including delivery of particulate products to the body. Applications of particle technology in production of pharmaceuticals, chemicals, foods, pigments, structural, and functional materials and in environmental and energy related matters. For materials-oriented contributions we are looking for articles revealing the effect of particle/powder characteristics (size, morphology and composition, in that order) on material performance or functionality and, ideally, comparison to any industrial standard.