DOI: 10.1016/j.colsurfa.2023.132563 Corpus ID: 264078305; An Investigation of Nanobubble Enhanced Flotation for Fly Ash Decarbonization @article{Huang2023AnIO, title={An Investigation of Nanobubble Enhanced Flotation for Fly Ash Decarbonization}, author={Hao Huang and Xiao Jin Yang and Zhongxian Wu and Bo Qiao and Guangxi Ma and Huaizhi Shao and Dongping Tao}, …
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The basic principle of fly ash triboelectrification is analysed. The mineral electrical index and test method are introduced. The electric difference of different mineral composition of fly ash is ...
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Since emulsion-like collectors contain surfactants, frother was not needed in the flotation process. The optimum pH for fly ash flotation was 7.0 (Wei et al., 2018), ... Attention has been paid to the floatation decarbonization of emulsion-like collector prepared from waste oil, so as to realize "treating waste with waste". ...
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In fly ash decarbonization technology, Tao [21] conducted a kinetic analysis of charged fly ash particles, which can effectively improve the efficiency of decarbonization. ...
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The device floated fly ash containing a large amount of unburned carbon near the water surface through aeration with the air diffuser, and then the floating material ( ash) …
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Coal fly ash (CFA), as a by-product of burning coal, is produced more than millions of tons per year [1].However, CFA that cannot be rationally utilized and is discarded and piled up not only occupies land, but also negatively affects the surrounding water and soil [2], increasing the potential hazards to human health [3].Resourceful recycling of CFA not only reduces the …
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In addition, polished fly ash can significantly improve the strength of fly ash concrete. In fly ash decarbonization technology, Tao [21] conducted a kinetic analysis of charged fly ash particles ...
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The development of clinker substitutions (slag, fly ash, volcanic rock, etc.) and adoption of alternative fuels (refuse-derived fuels (RDF), biomass fuels, plastics, rubber, leather, waste tires ...
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The pre-combustion process is similar for coal, oil and natural gas, although additional purification stages are required when using coal or oil to remove impurities such as ash, sulphur compounds and other minor contaminants. The process for pre-combustion capture in power generation is illustrated in Fig. 7 [110].
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SCMs can be used to reduce the total mass of clinker required per ton of cement produced, while still maintaining similar mechanical properties to OPC. 18 Fly ash or blast furnace slag, two of the main SCMs used to date, are byproducts of the combustion of pulverized coal and of steel production, respectively. 10 While over the last 20 years ...
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This work is the first application of mechanically breaking pore to the flotation separation of unburned carbon and ash from coal gasification fly ash and provides valuable …
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The separation process of fly ash particles in the nonlinear electric field is explored through the establishment of geometric model and the application of CFD-DEM coupled calculation method, and ...
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The ash content of the final concentrate can reach 26.91 %, and the LOI of the tailings is 8.23 %, which is reduced by 10.18 % and 5.54 % respectively compared with primary flotation. The flotation tailings meet the standard of Class III fly ash
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The high unburned carbon content of solid waste coal gasification fly ash is the main reason that it cannot be used in the construction material industry, which leads to serious waste of resources and environmental pollution.Currently, decarburization flotation has been a dominating method for coal gasification fly ash resource utilization.However, the flotation …
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The landfill fly ash processing facility combines ST's novel drying and particle sizing system with ST's long proven electrostatic separation process for removing unburned carbon from fly ash. The drying process consists of a coarse screening process to reject bottom ash, followed by a thermal flash drying process and a particle size ...
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The "old" particles probably come from the large coal particles by the attrition process and will experience longer residence time in the furnace before the large particles reduce into size so small to be elutriated away from cyclone ... The fly ash decarbonization characteristics and mass distribution in test system is shown in Fig. 8.
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The landfill fly ash processing facility combines ST's novel drying and particle sizing system with ST's long proven electrostatic separation process for removing unburned carbon from fly ash. The drying process consists of a …
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The invention relates to a decarbonization technology of coal fly ash with over-standard loss on ignition, original ash of the coal fly ash is sent to an ash storage tank of a treatment plant by a bulk tank car and sent to an ore pulp pre-processor after the measurement, an automatic dosing machine also adds a dispersant and a compound flotation agent into the ore pulp pre …
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fly ash can also prevent the alkali-silicate reaction of concrete, which can increase the density and later-age strength of the interfacial transition zone and reduce carbon emissions [3–9]. Although fly ash has exhibited extensive applica-tion in concrete, the carbon from the combustion process of coal can degrade the quality of fly ash and
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The clinker production process involves heating limestone at temperatures above 1,400 degrees Celsius, which is a massive energy expenditure in itself. ... While these clinker replacements come with their own complications (society's broader decarbonization will mean less fly ash byproduct, for example), they point to a creativity and ...
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The influence of fly ash electroselective decarbonization in nonlinear electric field is studied. The electric field with nonlinear boundary is designed. The motion separation process of fly ash particles in nonlinear electric field is evaluated by CFD-DEM coupling calculation. The evaluation index of fly ash decarbonization is established.
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The influence of fly ash electroselective decarbonization in nonlinear electric field is studied. The electric field with nonlinear boundary is designed. The motion separation process of fly ash particles in nonlinear electric field is evaluated by CFD-DEM coupling calculation. The evaluation index of fly ash decarbonization is established. (2)
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When the replacement rate of fly ash was 15%, 25%, and 35% (the water-binder ratio was 0.35), the carbonation depth of concrete with flotation fly ash (FC group) after 28 days accelerate ...
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The alkanes are indispensable as the collector in the fly ash flotation process and synergize with aromatic compounds to improve the mobility of water molecules on the UC surface. The CTB collector significantly enhanced the floatability of the UC particle and hence improved the flotation removal of UC from fly ash. ... The decarbonization of ...
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To promote the widespread use of fly ash (FA) and coal gasification slag (CGS) in mine filling, reducing the amount of cement and promoting the sustainable development of mining enterprises are essential. In this study, decarbonized CGS (DCGS) was prepared from CGS through decarbonization. A new DCGS-FA filling material was prepared using DCGS, FA, …
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Request PDF | On Oct 1, 2023, Hao Huang and others published An Investigation of Nanobubble Enhanced Flotation for Fly Ash Decarbonization | Find, read and cite all the research you need on ...
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The general process of fly ash decarbonization through tribo-electrostatic separation is as follows. Under the triboelectrostatic ... The basic operation process of the RTS is as follows: (1) Fly ash
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Due to the oversaturation of gas solubility in aqueous solution, interfacial nanobubbles (INBs) nucleate and grow on the solid–liquid interface which can be explained by heterogeneous nucleation theory [1].INBs with unique physicochemical properties, like large specific surface area and super long lifetimes, has attracted the attention of researchers in …
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The general process of fly ash decarbonization through triboelectrostatic separation is as follows. Under the triboelectrostatic action, particles with high surface work function (i.e., carbon particles in pulverized coal ash) undergo friction and collision, becoming negatively charged, while other particles (i.e., ash particles) become positively charged [11].
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Process Flow Diagram of the biomass-based capture process in which Li 4 SiO 4 is used to capture CO 2: a) pre-treatment of Si-sourced fly-ash; b) CO 2 capture process. The calculator block C1 in Fig. 2 is the equivalent of a controller which sets the flowrate of the lithium source, automatically recalculating the amount of lithium needed as the ...
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This work evaluated the change of airflow and kinematic characteristics of fly ash particles in the separation process of fly ash using rotary triboelectrostatic separator. ... Effects of key factors of rotary triboelectrostatic separator on efficiency of fly ash decarbonization. Int. J. Min. Sci. Technol., 27 (6) (2017), pp. 642-647. View in ...
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CO 2 mineralisation by fly ash can not only reduce CO 2 emissions, but also increase the stability of fly ash by reducing the alkaline contents through carbonation …
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The main methods of fly ash decarbonization at coal combustion power plants are classified as dry and wet, or chemical and physical method. The dry separation process mainly includes the combustion method, electric separation method and fluidization method, etc. While the wet method mainly includes ultrasonic column condensation and flotation ...
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The invention discloses a high-carbon fly ash flotation decarbonization process with stabilization characteristics, which comprises the steps of feeding high-carbon fly ash raw...
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For example, the fly ash decarbonization device disclosed in CN210701178U is to remove carbon for the first time by arranging screening devices at two ends of a filter screen, and then to remove carbon for the second time by a filter box. ... in the wet grinding process, the grinding ball impacts the surface of the fly ash particles to enable ...
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In this paper, the flotation decarburization treatment was carried out on high carbon fly ash (HCFA) to obtain flotation decarburized fly ash (FDFA).
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A decarburization system device for fly ash with overproof ignition loss comprises a box-type tube blower, a powerful stirring machine, an ore pulp pretreater, a flotation column, a thickener and a filter, wherein high-ignition loss original fly ash is weighed by an electronic weighing scale and then is fed into the box-type tube blower; the flay ash is fed into the powerful stirring machine ...
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In general, coal ash can be divided into three components: slag, bottom ash, and fly ash. The majority of coal ash produced in modern utility boilers is fly ash [74].The principle components of fly ash are unburned carbon and spherical ash components, including glass cenospheres, magnetic particles, and fine Si Al ash [11, 76], as shown in Fig. 1.The …
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