Preparing high-strength ceramsite from ferronickel slag and municipal solid waste incineration fly ash

Wu, Xintao; Gu, Foquan; Su, Chang; Wang, Wei; Pu, Kai; Shen, Dongsheng; Ye, Long

doi:10.1016/j.ceramint.2022.07.357

Cited by 39 publications

(3 citation statements)

References 29 publications

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“…Additionally, the volume of the FMC expanded and became larger due to the gas generated, leading to a decrease in bulk density and an increase in porosity [44]. When the roasting temperature increased from 1050 • C to 1150 • C, a liquid phase started to appear in the FMC, and it gradually increased and flowed into the FMC to fill the pore structure, resulting in a decrease in the pore volume and an increase in the density of the FMC [20,31,45]. As the density increased, the porosity decreased [40].…”

Section: The Influence and Determination Of Roasting Temperaturementioning

confidence: 99%

“…Additionally, some researchers have studied ceramic aggregate as an aggregate. Wu et al [20] evaluated the influence of the amount of MSWI fly ash incorporated in the microstructure and the properties of the ceramic granules through the mercury intrusion method and scanning electron microscopy. That study pointed out that the degree of densification inside the ceramic granules is positively correlated with the incorporation amount of MSWI fly ash (no more than 20 wt%), while the porosity of the ceramic granules is negatively correlated with the incorporation amount of MSWI fly ash (no more than 20 wt%).…”

Section: Introductionmentioning

confidence: 99%

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Ceramic Aggregate Material Formulated with MSWI Fly Ash and Fuel Ash for Use as Filter Media

Lü

Chen

et al. 2023

Minerals

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This study aimed to develop a novel filtering medium ceramic aggregate prepared using municipal solid waste incineration (MSWI) fly ash and the fuel ash from coal power plants, together with small amounts of silicon carbide foaming agent and magnesia flux as additives. For the manufacturing process, the dosage of MSWI fly ash and the sintering temperature were optimized to maximize the performance of the resulting materials. Leaching test results indicated that the heavy metal concentrations in the ceramic aggregate were significantly below the limits proposed by GB5085.3-2007, demonstrating its safety for wastewater treatment. The ammonia nitrogen removal efficiency was assessed, and the removal rate of the developed ceramic aggregate was found to be 16.4% higher than that of zeolite, making it comparable to commercial ceramic aggregate. Scanning electron microscopy and X-ray diffractometer analyses were conducted on the ceramic aggregates. The ammonia-nitrogen-removing mechanism, attributed to adsorption and ion exchange, is discussed based on the microstructural analysis results.

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Section: The Influence and Determination Of Roasting Temperaturementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Ceramic Aggregate Material Formulated with MSWI Fly Ash and Fuel Ash for Use as Filter Media

Lü

Chen

et al. 2023

Minerals

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“…The CO 2 curing can decrease the leaching amount of toxic metal elements by 76.1% and 71.3%. This is because the WFA contains some toxic metal elements (Cr and Zn), which, when immersed in the water for several months, the toxic metal elements seepage through pores of RPC, thus increasing the content of toxic metal elements [46,47], while the CO 2 curing can decrease the amount of leached toxic metal elements. Comparing Figure 9a with Figure 9b, the amount of leached Zn is higher than that of leached Cr.…”

Section: The Leaching Of Toxic Metal Elementsmentioning

confidence: 99%

The Influence of CO2-Cured Incinerated Waste Fly Ash on the Performance of Reactive Powder Concrete

Wang

Wan-zhen

et al. 2023

Coatings

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Incinerated waste fly ash is a toxic solid, which can cause serious harm to the environment. CO2-cured incinerated waste fly ash may be useful in decreasing the toxicity of waste fly ash and improving the corresponding mechanical properties of cement-based material with incinerated waste fly ash. Meanwhile, this technology can play a certain role in reducing the content of CO2 in the atmosphere. In this study, the influence of CO2-cured incinerated waste fly ash on the rheological parameters (the slump flow and plastic viscosity) and the setting time of fresh reactive powder cement concrete (RPC) is investigated. The flexural and compressive strengths of hardened RPC standard cured for 1 day, 3 days, and 28 days are measured. The leached amounts of Cr and Zn immersed in water for 6 months are measured. The scanning electron microscope photos, thermogravimetric analysis curves, and mercury intrusion curves are obtained. Our results show that the slump flow, the setting time, and the flexural and compressive strengths increased, and the plastic viscosity decreased by adding the waste fly ash with the maximum varying rates of 12.1%, 41.7%, 41.3%, and 61.2%, respectively. CO2 curing on the waste fly ash can increase the setting time and the flexural and compressive strengths with the maximum varying rates of 19.2%, 13.1%, and 14.2%. The effect of CO2-cured waste fly ash on the mechanical strengths of RPC is quite limited.

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Potential of major by-products from non-ferrous metal industries for CO2 emission reduction by mineral carbonation: a review

Abdul¹,

Iizuka²,

Ho³

et al. 2023

Environ Sci Pollut Res

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Preparing high-strength ceramsite from ferronickel slag and municipal solid waste incineration fly ash

Cited by 39 publications

References 29 publications

Ceramic Aggregate Material Formulated with MSWI Fly Ash and Fuel Ash for Use as Filter Media

Ceramic Aggregate Material Formulated with MSWI Fly Ash and Fuel Ash for Use as Filter Media

The Influence of CO2-Cured Incinerated Waste Fly Ash on the Performance of Reactive Powder Concrete

Potential of major by-products from non-ferrous metal industries for CO2 emission reduction by mineral carbonation: a review

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