Application of Fly Ash from Pulp and Paper Industries as Slag …
Herein, fly ash (FA) containing ≈60% CaO generated from pulp/paper mills is tested to partially (15–50%) replace primary lime (PL) in pilot scale EAF trials. The obtained results show good possibilities. ... before the steel melt was transferred to a pilot argon oxygen decarburization (AOD) converter.
اقرأ أكثر
Method for removing carbon from fly ash
For example, CN108906339A discloses a method for flotation and decarburization of fly ash, which comprises adding water into fly ash, mixing, adding flotation agent, and performing tertiary flotation to separate carbon particles and fly ash. Although the carbon removal effect of the method for removing carbon by flotation with the agent is ...
اقرأ أكثر
Preparation and Mechanism Analysis of Stainless Steel AOD …
To promote resourceful utilization of argon oxygen decarburization (AOD) slag, this research developed a new three-ash stabilized recycled aggregate with AOD slag, cement, fly ash (FA), and recycled aggregate (RA) as raw materials. The AOD slag was adopted as an equal mass replacement for fly ash. The application of this aggregate in a road base layer was …
اقرأ أكثر
Improving flotation decarbonization efficiency of coal gasification fly
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 …
اقرأ أكثر
Evaluation of binary surfactants on the flotation performance of
Results show that SDS-Tween 80 with the mixture ratio of 3:7 is superior to the other surfactant mixtures in decarburization and PCDD/Fs removal, and can remove 91.4% of carbon constituents and 89.3% of PCDD/Fs. ... Keywords Incinerator fly ash Flotation Binary surfactant Decarburization Polychlorinated dibenzo-p-dioxins and dibenzofurans ...
اقرأ أكثر
Detoxification of medical waste incinerator fly ash through successive
The first step involved decarburization flotation, whereby 91.0% of the dioxins in MWI fly ash were transformed into a froth product. In the second step (ion flotation), the influence of ionic strength on heavy metals recovered from both raw and stimulated filtrates was explored.
اقرأ أكثر
Beyond Portland cement: Low-carbon alternatives
Portland cement production is already responsible for over 8% of global carbon emissions 1, yet its production is set to increase by 25% by 2050 1 - a period in which rapid global decarbonisation is urgently required. Current methods of reducing the amount of embodied carbon in concrete – replacing cement with slag and fly ash – are inadequate due to their small and declining …
اقرأ أكثر
Utilization of fly ash and waste lime from pulp and paper mills in …
Thirdly, the metallurgical performance of fly ash and waste lime is as good as primary lime when considering the aspects that: (a) utilization of fly ash and waste lime doesn't have negative effects on the decarburization stage nor on the reduction stage during the AOD process; and (b) fly ash and waste lime are as efficient desulfurization ...
اقرأ أكثر
WO2009122895A1
In removing unburned carbon from fly ash by wet flotation, the amount of a foaming agent to be used is reduced to attain a reduction in chemical cost and the fly ash is prevented from decreasing in activity index. A method for the wet decarburization of fly ash is provided which comprises: adding water to the fly ash to form a slurry; adding a hydrophobizing agent and a …
اقرأ أكثر
The experimental study of fly ash decarbonization on a circulating
At present, the decarbonization method of high carbon content CFB fly ash is mainly fly ash recirculation combustion (FARC) technology, which sends the high carbon …
اقرأ أكثر
Re-Engineering Fly Ash SCM For Green Cement
"We put these two businesses together to create a champion for the way that concrete is mostly decarbonized today through the use of SCMs like fly ash and also how we're going to do it in the...
اقرأ أكثر
Investigation on the effects of fluid intensification based
Effect of fluid intensification on the decarburization performance of fly ash flotation. Note: γ ∞ i and k i ( i = 1, 2, 3, 4, 5) denote the maximum cumulative recovery of unburned …
اقرأ أكثر
(PDF) Utilization of fly ash and waste lime from pulp and paper …
Utilization of fly ash and waste lime from pulp and paper mills in the Argon Oxygen Decarburization process . × ... Utilization of fly ash and waste lime from pulp and paper mills in the Argon Oxygen Decarburization process. Xianfeng Hu. 2020, Journal of Cleaner Production.
اقرأ أكثر
Effect of chloride on the decarburization and detoxification of …
DOI: 10.5004/DWT.2018.22545 Corpus ID: 104657801; Effect of chloride on the decarburization and detoxification of washed incinerator fly ash @article{Wei2018EffectOC, title={Effect of chloride on the decarburization and detoxification of washed incinerator fly ash}, author={Guo-xia Wei and Hanqiao Liu and Fang Liu and Tong Zeng and Rui Zhang and Yu-wen Zhu}, …
اقرأ أكثر
Discrete element numerical simulation of fly ash triboelectrostatic
DOI: 10.1016/J.APT.2021.03.015 Corpus ID: 233671647; Discrete element numerical simulation of fly ash triboelectrostatic separation in a nonlinear electric field @article{Haoran2021DiscreteEN, title={Discrete element numerical simulation of fly ash triboelectrostatic separation in a nonlinear electric field}, author={Dong Haoran and Zhou Hui and Feng Yuheng and Li Haisheng and …
اقرأ أكثر
The experimental study of fly ash decarbonization on a circulating
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%. If recovery the heat from the high temperature flue gas for heating the fluidization air to 350 °C and then sends it into furnace directly, the value of ...
اقرأ أكثر
Utilization of fly ash and waste lime from pulp and paper mills in …
DOI: 10.1016/j.jclepro.2020.121182 Corpus ID: 216227124; Utilization of fly ash and waste lime from pulp and paper mills in the Argon Oxygen Decarburization process @article{Hu2020UtilizationOF, title={Utilization of fly ash and waste lime from pulp and paper mills in the Argon Oxygen Decarburization process}, author={Xianfeng Hu and Tova Jarnerud and …
اقرأ أكثر
CN105149099A
The invention relates to a reverse-blowing tribo-electrostatic separation method and device for fly ash decarburization. Negative pressure is generated in a nozzle through airflow generated by a negative pressure system, and fly ash particles enter the nozzle through a negative-pressure sucking pipe; fly ash is blown into a gas-solid mixed pipeline under the action of the airflow to …
اقرأ أكثر
Utilization of fly ash and waste lime from pulp and paper mills in …
The chemical compositions of fly ash, waste lime as well as the primary lime (used as reference) are shown in Table 3. It is seen that the CaO contents in fly ash and waste are respectively 60.5% and 90.6%, which are lower than that in the primary lime (CaO content 95.2%). The XRD analysis results of fly ash and waste lime are shown in Fig. 2 ...
اقرأ أكثر
Investigation on the effects of fluid intensification based
Fly ash (FA) is a complex and ... Therefore, with the decarburization process fulfilled, not only can the separated UC be recycled elsewhere, but the leftover ash will find its way. Flotation has been proven to be an effective separation technique aimed at the removal of UC from FA [16]. This process mainly utilizes the differences in the ...
اقرأ أكثر
Experimental study on decarburization of fine fly ash by electric
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}, …
اقرأ أكثر
Effect of pH on the flotation performance of incinerator fly ash
Flotation was proved to be effective for decarburization and removal of dioxins from hospital solid waste (HSW) incinerator fly ash, but weathering makes it difficult.
اقرأ أكثر
Electrical properties of fly ash and its decarbonization by
Combined with the experimental study on rotary triboelectrostatic separation, the charged characteristic of fly ash particles with different size is gained. The results show that …
اقرأ أكثر
Investigation on the effects of fluid intensification based
Request PDF | Investigation on the effects of fluid intensification based preconditioning process on the decarburization enhancement of fly ash | Fly ash (FA) is a complex and abundant solid waste ...
اقرأ أكثر
Evaluation of binary surfactants on the flotation performance …
with the mixture ratio of 3:7 is superior to the other surfactant mixtures in decarburization and PCDD/Fs removal, and can remove 91.4% of carbon constituents and 89.3% of PCDD/Fs. ... fly ash are enriched in UC during incineration [4]. Every gram of PAC can absorb 105~115 ng PCDD/Fs, so the adsorption capacity of PAC is remarkable [5]. Therefore,
اقرأ أكثر
Electrical properties of fly ash and its decarbonization by
In the same conditions, the best decarburization effect is realized when the particle size ranges from 0.038 to 0.074 mm, whose decarbonization rate and efficiency index reached 38.93% and 120.83% ...
اقرأ أكثر
Effect of Prestirring Time on Carbon Removal from …
Unburned carbon (UC) in fly ash indicates inefficiency in combustion and may be an impediment to the beneficial use of fly ash or ash products in a variety of applications. The characteristics of the coal-derived …
اقرأ أكثر
Electrical properties of fly ash and its decarbonization by
The fly ash sample employed in this study was collected from the fly ash precipitation system at the Xinwen coal combustion power plant in Shandong province in three different periods of time to ensure the representativeness of the sample. ... The products after decarburization can be used for building materials, road construction material and ...
اقرأ أكثر
Effects of key factors of rotary triboelectrostatic separator on
Effects of key factors of rotary triboelectrostatic separator on efficiency of fly ash decarbonization Youjun Tao, Ling Zhang, Dongping Tao, Yushuai Xian, Qixiao Sun; Affiliations Youjun Tao Key Laboratory of Coal Processing and Efficient Utilization of Ministry of Education, China University of Mining & Technology, Xuzhou 221116, China; School ...
اقرأ أكثر
Experimental study on decarburization of fine fly ash by electric
The effect of rotary triboelectric separation parameters on decarburization of fly ash was systematically studied to prove that the technology was an effective means to purify fly ash.
اقرأ أكثر