— The production of flue gas desulfurization gypsum poses a serious threat to the environment. Thus, utilizing gypsum-based self-leveling mortar (GSLM) stands out as a promising and effective …
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Request PDF | On Mar 1, 2022, Qianming Lu and others published Preparation of Sludge Ash–Desulfurization Gypsum-Based Backfill Materials Using Microwave Calcination | Find, read and cite all the ...
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— There were 12 ratios of concrete brick, fixing 5.5 wt% of FGD gypsum to replace Portland cement and substituting coarse sand with 0 wt%, 25 wt%, 50 wt%, or 75 wt% of CDW, and gravel with 0 wt%, 0. ...
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DOI: 10.1016/j.cjche.2020.05.021 Corpus ID: 219511603; Calcium sulfate whisker prepared by flue gas desulfurization gypsum: A physical–chemical coupling production process
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— For instance, in Czech Republic calcined gypsum is produced from FGD gypsum only in one power station, in the remaining production ends with gypsum that is used only partially as additive retarding the setting of cement. Calcined gypsum as a low-energy material can be produced with advantage from the waste FGD gypsum by its …
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— This research aims to study the utilization of waste from power plants, construction and demolition, and agriculture by varying the ratios of flue-gas …
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— At present, the continuous accumulation of the flue gas desulfurization (FGD) gypsum in steel plants leads to the serious environmental issues and resource waste. To achieve green and sustainable development for the steel industry, it is significant to improve the usage of by-product gypsum. Employing the sintering FGD gypsum, ferric oxide, and …
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— The industrial byproduct gypsum is a general term for byproducts discharged from industrial production with calcium sulfate as the main ingredient. Due to the high number of impurities and production …
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— In this paper, the solid waste desulfurization gypsum produced by coal-fired power plants was used as raw material to prepare calcium sulfate whiskers with high application prospects.
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— Due to these characteristics, the use of naturally mined raw gypsum material in applications typically involves multiple processing procedures and steps. 1 However, synthetic gypsum is highly similar to naturally mined gypsum 2; hence, specific types of synthetic gypsum have replaced natural gypsum in several industries such as cement …
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— Approximately 75% of this production is used in cement and concrete production and agriculture, mostly for the Materials 2024, 17, 3774 2 of 14 manufacture of gypsum boards [3]. Traditionally, FGD ...
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Properties of Flue Gas Desulfurization Gypsum RAMZI TAHA As a result of sulfur oxides (SOx) emissions control for power plants burning lignite or sulfur coals, 18,000,000 Mg (20 million tons) of flue gas desulfurization (FGD) gypsum are generated annually in the United States. One application under which the
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— Exports of Omani gypsum – a key raw material for the cement and gypsum board manufacturing industries – amounted to 8.74 million tons in 2021. ... importing countries will be increasingly looking to …
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— Flue gas desulfurization (FGD) gypsum is a byproduct of the combustion of coal, used for electricity generation. ... The study found that the production of FGD …
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— In the clinker production of modified desulfurization gypsum and cement, electricity and coal are the largest source of power and the primary source of carbon emissions. There are more power consuming equipment and links in cement production than in modified gypsum production (Habert et al., 2010). Furthermore, the calcinations …
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— Natural gypsum can be used in concrete production as a replacement for calcium aluminate cement (CAC), opening the possibility of replacing the natural gypsum with FGDG in this application with success, even though some studies have reported a reduction of compressive strength and water solubility when compared to conventional …
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— In order to achieve the resourceful, large-scale and high-value utilization of bulk industrial solid wastes such as flue gas desulfurization gypsum (FGDG), fly ash (FA) and ground blast furnace slag (GGBS), and to reduce the dosage of cementitious materials, orthogonal experimental methods were used to prepare composite cementitious …
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— Based on salt effect and the solubility equilibrium theory of insoluble electrolyte, the technological process of ammonia-enhanced desulfurization gypsum carbonation for CO 2 sequestration in NH 4 Cl-H 2 O system was studied, and calcium carbonate with different crystal phase and morphology was prepared in this paper. The …
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Desulfurization (FGD) Gypsum What Is Gypsum? Gypsum is calcium sulfate dihydrate, or CaSO 4 •2H 2 ... become gypsum. The material is then dewatered and processed; the end product is a consistent, finely divided powder. ... total production of FGD gypsum in 2006 was approximately 12 million tons. Close to 9 million tons of FGD gypsum was
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— Overview of the Industrial Byproduct Gypsum 2.1. Source Desulfurization gypsum (DG) is the byproduct of the limestone–gypsum flue gas desulfurization process in coal-fired power plants [] . In China, the annual production of DG can reach up to million tons, and the utilization rate has been around % in recent years.
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— @article{Duan2018InvestigationIT, title={Investigation into the synergistic effects in hydrated gelling systems containing fly ash, desulfurization gypsum and steel slag}, author={Siyu Duan and Hongqiang Liao and Fang Qin Cheng and Huiping Song and Hengquan Yang}, journal={Construction and Building Materials}, year={2018}, …
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— 1. Introduction. In recent years, the global production of flue gas desulfurization gypsum (FGDG) has surged, with annual emissions exceeding 255 million tons [].Currently, with the continuous increase in energy consumption and increasingly stringent environmental requirements, the production of FGDG in China has exceeded …
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However, desulfurization gypsum has some own features as relatively finer solid size (60 μm), high water content (10–15%) and impurity, these have special effect on the utilization. The desulfurization gypsum are widely utilized in cement retarder, building material, embedment and neutralizer or regulator of soil in agriculture [3, 4].
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— @article{Duan2023StudyOT, title={Study on the influence mechanism of flue gas desulphurisation gypsum on solid waste-based geopolymer grouting materials}, author={Dedan Duan and Huiping Song and Fanyu Liu and Qian Liu and Zhifang Fan and Huaigang Cheng and Fangqin Cheng}, journal={Construction and Building Materials}, …
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What is desulfurization gypsum. Desulfurization gypsum, also known as FGD gypsum (flue gas desulfurization gypsum), is an industrial by-product gypsum obtained by desulfurization and purification of flue gas …
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— Exports of Omani gypsum – a key raw material for the cement and gypsum board manufacturing industries – amounted to 8.74 million tons in 2021. ... importers will increasingly pivot to the Sultanate of Oman for their gypsum requirements in the face of slumping supplies from longstanding exporting nations, according to a key industry ...
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DOI: 10.1016/j.jclepro.2022.132185 Corpus ID: 248715314; Experimental study of permeability evolution in modified desulfurization gypsum under complete stress–strain process
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— DOI: 10.1252/JCEJ.10WE282 Corpus ID: 94773775; Salt-Affected Soil Amelioration with Flue Gas Desulfurization By-Products and Waste Gypsum Board in Tianjin, China @article{Sakai2011SaltAffectedSA, title={Salt-Affected Soil Amelioration with Flue Gas Desulfurization By-Products and Waste Gypsum Board in Tianjin, China}, …
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— In order to increase the content of mineral admixtures in cement, this study proposes a method for preparing a high-volume mineral admixture cementitious material (HMAC) using superfine cement as a reverse filling material. Firstly, superfine cement is prepared through mechanical grinding. Then, the activity of mineral admixtures (such as …
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— The annual output of desulfurization gypsum in China is more than 120 million tons, and it is increasing at a rate of 15–20% each year (Liu et al., 2021; Jian et al., 2021). Desulfurization gypsum is the second largest solid waste after fly ash. The primary method of disposing desulfurization gypsum is to dump it on land.
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