Energy recovery from concentrate in waste gasification fine slag by clean flotation assisted by waste oil collector

Chun-chen Nie, Si-qi Jiang, Shun-xiang Shi, Xian-jun Lyu, Yong-qiang Zhao and Xiang-nan Zhu

Energy, 2023, vol. 273, issue C

Abstract: The feasibility of energy recovery from flotation concentrate with waste oil as collector from gasification fine slag was verified. The calorific value of flotation concentrate with different size was studied. Firstly, size composition, particle morphology and phase composition of gasification slag were analyzed. Subsequently, the flotation characteristics and kinetics of narrow size slag particle were revealed. Scanning electron microscope (SEM), Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS) results show that the gasification slag is porous and rough, and the surface hydrophobicity is weak, resulting in the massive consumption of collector. As collector, waste oil and diesel oil have similar flotation effect. Loss on ignition (LOI) of concentrate decreases from 42.28% to 34.19% and the recovery increases from 34.09% to 38.85% when the waste oil collector dosage increases from 4 to 14 kg/t. With the decrease of particle size, recovery increases from 39.04% to 50.93%. Traditional flotation kinetic models can describe the flotation characteristics of gasification slag accurately. Finally, calorific value of flotation concentrates with different size range from 5.81 to 19.01 MJ/kg, which illustrate the flotation concentrate has potential to be used as fuel. Therefore, the goal of treating waste (gasification slag) with waste (waste oil) is achieved.

Keywords: Energy recovery; Treating waste with waste; Coal gasification slag; Waste oil collector; Clean flotation (search for similar items in EconPapers)
Date: 2023
References: View references in EconPapers View complete reference list from CitEc
Citations:

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0360544223006795
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:273:y:2023:i:c:s0360544223006795

DOI: 10.1016/j.energy.2023.127285

Access Statistics for this article

Energy is currently edited by Henrik Lund and Mark J. Kaiser

More articles in Energy from Elsevier
Bibliographic data for series maintained by Catherine Liu ().