Ke Liu , Ying Zhang , Jinming Jiang , Koji Takasu , Weijun Gao
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引用次数: 0
Abstract
Petrochemical-based collectors are costly and non-renewable, so it is crucial to find a new kind of environmentally friendly and efficient collector. In this paper, waste fried oil (WFO) and kerosene were selected as collectors, and their flotation performances for high‑carbon content fly ash (HCFA) and low-carbon content fly ash (LCFA) were compared. The results revealed that the main compounds in WFO had carbon chain lengths ranging from C18-C30, which had stronger hydrophobicity. The numerous oxygen-containing groups in WFO could bond with the hydrophilic sites on unburned carbon, facilitating WFO adsorption and increasing the surface hydrophobicity of the unburned carbon. By increasing the WFO dosage from 0 to 3.25 kg/t, the contact angles of HCFA and LCFA increased by 153 % and 86 %, respectively. When the WFO dosage was 3.25 kg/t, the floatation of HCFA and LCFA produced tailings with loss on ignition of 5.37 % and 0.75 %, meeting GB Class II and GB Class I fly ash standards, respectively. Additionally, the recovery of unburned carbon improved by 21.42 % and 15.15 %. Furthermore, compared to kerosene, using WFO for the flotation of 1 t of HCFA and LCFA generated an extra profit of 10.29 USD and 4.61 USD. WFO demonstrated greater flotation efficiency and economic advantages over kerosene in the treatment of HCFA and LCFA, suggesting significant potential for industrial applications.
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.
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