Qixiao Sun's 3 research works with 43 citations and 120 reads, including: Effects of key factors of rotary triboelectrostatic separator on efficiency of fly ash decarbonization | Find out more.
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Request PDF | Experimental study of fly ash decarbonization on a circulating fluidized bed combustor | Fly ash is a by-product of coal-fired power plants, whose production is huge. As the coal ...
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In scavenging flotation, Oil #3 consumption was 14 kg/t, and MIBC consumption was 1.5 kg/t. The concentrate yield was 3.20 %, with an ash content of 26.91 %. The tailings mineral content reached 37.67 %, with an ash content of 91.77 % and a loss on ignition (LOI) of 8.23 %. The tailings products met the requirements of Class III fly ash.
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of fly ash decarbonization ... Fly ash contains a lot of useful substances, such as carbon, ceno-spheres, pozzolans, and the like, thus it should not be abandoned as waste. At present, fly ash ...
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In this study we assumed the total decarbonization of the fly ash as the worst-case scenario. The off-gases from the decarbonization operation is cooled and treated to remove SO 2 and CO 2 before being released to the atmosphere. A wet-limestone scrubbing system can be used for desulfurization, generating gypsum as a by-product that can be ...
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The results show that the dielectric constant of fly ash with different grain size decreased with the decrease of particle size, which lead to the poor electrical conductivity. …
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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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Fly ash decarbonization is the operation that contributes the most to life cycle GHG emissions, with 9.8 kg CO 2 eq/kg V 2 O 5. This number represents 37% of the total GHG emissions. Almost all the GHG emissions from fly ash decarbonization are process GHG emissions from the combustion of carbon in the feedstock, ...
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DOI: 10.1016/J.IJMST.2017.06.004 Corpus ID: 116325770; Effects of key factors of rotary triboelectrostatic separator on efficiency of fly ash decarbonization @article{Tao2017EffectsOK, title={Effects of key factors of rotary triboelectrostatic separator on efficiency of fly ash decarbonization}, author={Youjun Tao and Ling Zhang and Dongping Tao and Xian Yushuai …
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With new sources of fresh fly ash unavailable, Titan America looked for opportunities to recycle fly ash from landfills and impoundments where low quality and / or excess fly ash was disposed of in previous years.
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Supplementary cementitious materials (SCMs), such as slag and fly ash, as well as portland limestone cement (PLC or Type 1L), have all been used successfully by state DOTs. Even with the wide availability of these materials, however, state DOTs face constraints in maximizing their use due to overly prescriptive criteria in their concrete ...
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DOI: 10.1080/19392699.2024.2407602 Corpus ID: 272949717; Experimental study on decarburization of fine fly ash by electric separation @article{You2024ExperimentalSO, title={Experimental study on decarburization of fine fly ash by electric separation}, author={Kaiwen You and Fangyu Ma}, journal={International Journal of Coal Preparation and Utilization}, …
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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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In addition, many decarbonization options across the cement and concrete value chain, such as carbon capture, utilization, and storage (CCUS) ... Traditional SCMs include fly ash, ground granulated blast-furnace slag (GGBFS), and silica fume, while innovative SCMs and fillers include calcined clay, increased limestone use, and recycled concrete
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The size fraction of fly ash was measured by laser particle analyzer (Microtrac S3500) which showed in Fig. 1. The density of fly ash particles and ash particles were measured with pycnometric method. The loss on ignition (LOI), density and yield of carbon particles were calculated from the known properties of fly ash particles and ash particles.
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Request PDF | On Apr 1, 2023, Rui Zhang and others published Improving flotation decarbonization efficiency of coal gasification fly ash by mechanically breaking pore: An experimental and ...
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The decarbonization technology can fully utilize the coal fly ash stacked by a power plant, thus generating substantial economic benefits; the coal fly ash during the operation can achieve...
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The fly ash decarbonization characteristics and mass distribution in test system is shown in Fig. 8. Although the cyclone is specifically designed for fly ash combustion with a cut size d 50 ≤ 10 μm and a large number of feedback materials could be seen from the quartz glass tube during the experiments, ...
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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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The carbon content of fly ash (FA) influences the performance of concrete. In this paper, the flotation decarburization treatment was carried out on high carbon fly ash (HCFA) to …
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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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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 invention discloses a high-carbon fly ash flotation decarbonization process with stabilization characteristics, which comprises the steps of feeding high-carbon fly ash raw ash slurry into a pulp preprocessor, simultaneously adding a flotation collector and a ing agent into the pulp preprocessor together, modulating to obtain mortar with certain mass percentage …
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The mechanism of enhanced decarbonization of coal fly ash by biodiesel collector was further analyzed by means of coating angle, saturated adsorption capacity, particle agglomeration behavior, infrared spectrum, gas chromatography-mass spectrometry and other test methods. The test results show that compared with conventional hydrocarbon oil ...
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On the basis of understanding the principle of rotary triboelectrostatic separation, dynamic analysis of charged fly ash particles aimed at determining the key factors and separation experiments to improve decarbonization efficiency had been carried out. Variables of electrode plate voltage and corrected wind speed are the key factors which affect the decarbonization …
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Results show that fly ash requires a minimum sectional thermal load of 0.42 MW/m 2 for continuous and stable combustion in test combustor, corresponding to the critical carbon content in the fly ash is 18%. The maximum decarbonization efficiency of the test CFB combustor is approximately 75%, which is much higher than that of FARC.
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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 DCG …
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Many SCMs come from so-called waste products, like fly ash from coal-fired power generation and blast-furnace slag from iron and steel production. 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 resourcefulness ...
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During the period from 2010 – 2020, US electricity generation from coal-fired power units declined by 51%. 1 The result has been a dramatic tightening of the supply of freshly generated production fly ash for use as a supplementary cementitious material (SCM) in several important markets throughout the US. Further declines in coal generating capacity have been …
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Fly ash is solid waste produced by thermal power generation, and its carbon content is a key factor affecting its recycling. Due to the large difference in fly ash quality and insufficient tribocharging, the parallel plate electric field with constant electric field strength cannot meet the practical needs of efficient decarbonization of fly ash particles with wide charge range …
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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 …
WhatsApp: +86 18221755073