Gas Desulfurization Gypsum-Based Polymer Materials
Abstract: To resolve problems caused by the accumulation of flue gas desulfurization gypsum (FGDG) in the environment, a polymer material was prepared …
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Abstract: To resolve problems caused by the accumulation of flue gas desulfurization gypsum (FGDG) in the environment, a polymer material was prepared …
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Considering the properties of desulfurized ash and desulfurization gypsum, suspended separation of impurities in the desulfurized gypsum was studied in an unbaffled, fat bottom, cylindrical ...
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The compaction effect and settlement were assessed through field tests. Abstract. Flue gas desulfurized gypsum (FGDG) is a waste material produced in the power stations during the flue gas desulfurization process. In China, a small amount of FGDG is used as cement additives or for gypsum boards, but there still exist a mass of …
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Geopolymer is an emerging green cementitious material that can be used to stabilize dredged clay (DC) as construction materials. This paper presented an experimental study on the effects of desulfurized gypsum (DG) on the mechanical properties (e.g., stress-strain characteristics, unconfined compressive strength (UCS) and water stability) …
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A flue gas desulfurization process capable of producing a high purity gypsum and also making equipment employed as minimum as possible is provided, which process comprises the steps of cooling and ...
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This shows that reducing the harmful elements in FGD gypsum is an important problem that needs to be solved when using FGD gypsum as fertilizer. The effect of FGD gypsum on crop growth and …
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DOI: 10.1016/j.cscm.2024.e02907 Corpus ID: 267121627; The effects of desulfurized gypsum on the mechanical properties of dredged clay with high initial water content stabilized by ternary geopolymer
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The most popular desulfurization technology is wet-FGD using limestone, with the product called FGD-gypsum, which main content is CaSO 4. According to the ... First is evidently positive effect. The emergence ratio and yield of the plants grown in the soils ameliorated with FGD gypsum was 1.1–7.6 times and 1.1–13.9 times those of the ...
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@article{Wang2023SynergisticEO, title={Synergistic effect of red mud, desulfurized gypsum and fly ash in cementitious materials: Mechanical performances and microstructure}, author={Yaguang Wang and Xiaoming Liu and Xiang Zhu and Wenxi Zhu and Jianwei Yue}, journal={Construction and Building Materials}, year={2023}, …
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In an attempt to figure out the transformation of fine particles during the limestone gypsum desulfurization, the physical properties of fine particles before and after the …
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the limestone gypsum flue gas desulfurization process, 2.7 ton of desulfurized gypsum can be generated for each 1 ton of SO2 removed [3]. A 300 MW coal-fired thermal power unit discharges about 30,000 ton of desulfurized gypsum every year (assuming 1.0% sulfur in coal) [4]. A substantial amount of desulfurized gypsum is generated as a by …
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1.1. Flue gas desulfurization processes. The flue gas desulfurization (FGD) processes can be separated into two main categories: once-through and regenerable processes, depending on how the sorbent is treated after SO 2 adsorption (Srivastava and Jozewicz, 2001).Once-through, or non-regenerable, processes utilize the sorbent as a …
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The test results show that sodium sulfate has a poor improvement effect on the sample due to the presence of desulfurized building gypsum in the composite cementing system, while calcium chloride and calcium formate can effectively promote the hydration of the cement in the composite cementing system, significantly improving the …
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Introduction. Flue gas desulfurization gypsum (FGDG) is an industrial byproduct produced by limestone-gypsum wet desulfurization to treat SO 2 produced by thermal power plants and coal-fired plants, whose main component is CaSO 4 ·2H 2 O. In wet desulfurization, 1 t of SO 2 produces about 2.7 t of FGDG [1], [2]. Some 130 million …
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Using SEM at a magnification of 8000×, photographs of desulfurized gypsum and carbide slag were taken, as shown in Fig. 1. From the images, it can be observed that the desulfurized gypsum appears as elongated blocky shapes, distributed loosely, while the carbide slag appears as small spherical granules, distributed evenly …
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Desulfurized ash from semi-dry flue gas desulfurization and α-hemihydrate gypsum were collected from Baotian New Building Materials Co.,Ltd. Their chemical components are shown in Table 1.Desulfurized ash contains about 21.33% hemihydrate calcium sulfite, 18.11% calcium carbonate, 28.55% dihydrate gypsum, 25.81% calcium …
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Semidry desulfurization and wet desulfurization in a furnace are usually used in the circulating fluidized bed boiler in the power production of thermal power plants, and these two approaches lead to high calcium content in the fly ash and bottom slag of circulating fluidized beds and produce abundant flue-gas desulfurized (FGD) gypsum …
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With the increasing attention on SO 3 emission in coal-fired power plants, the removal of SO 3 acid mist in a limestone-gypsum wet flue gas desulfurization (WFGD) …
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DOI: 10.1089/EES.2020.0424 Corpus ID: 234827580; Integrated Assessment of the Environmental and Economic Effects of Resource Utilization Process for Lime/Gypsum Flue Gas Desulfurization Collaborative Desulfurized Gypsum
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a limestone stream mixer (MIXER) is considered, although this does not exist in the actual process. It mixes the two streams of low-grade (LIME1) and high-grade limestone (LIME2). This stage was added to predict the mixing ratio of limestone that can allow the use of low-grade limestone and high-grade limestone. The sec-
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Special attention is required on the fine particle control after desulfurization because a large quantity of fine particles are emitted into the atmosphere from the coal-fired power plants. In an attempt to figure out the transformation of fine particles during the limestone gypsum desulfurization, the physical properties of fine particles before and after the …
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Oman Gypsum quarry is located 19 km South of Thumrait city, Salalah. Thumrait is the nearest city. ... Commercial- ly, limestone powder is used in antacids as filler in various industry, VIEW ALL PRODUCTS. Contact. OMAN INDUSTRIES GYPSUM L.L.C P.O BOX 101, SALALAH -218 SULATANATE OF OMAN Help Line. 00968-95416949 ...
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The soil nutrient content of the ameliorated saline-alkali soils with different ages,and the diurnal courses curve of photosynthetic parameters,photosynthetic light response curve and yield of oil-sunflower(Helianthus annuus) grown on the ameliorated soils were measured to investigate the effects of desulfurated waste residue additions on the saline-alkali …
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With the increasing attention on SO3 emission in coal-fired power plants, the removal of SO3 acid mist in a limestone-gypsum wet flue gas desulfurization (WFGD) system was investigated. The generation properties of SO3 acid mist were analyzed with an experimental system, and the effects of flue gas properties and technologies for ultralow …
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The resulting product still met building requirements. Yang et al. [11] studied the effect of desulfurized gypsum on the properties of calcium sulfoaluminate cement. The results showed that FGDG ...
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Desulfurization gypsum is an industrial by-product produced during the process of wet flue gas desulfurization using limestone–gypsum in coal-fired power …
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Usually, limestone (CaCO 3) and lime (CaO) are used as Ca(OH) 2 sources thanks to their abundance and low cost. Due to its low solubility, limestone needs to be pulverized in order to be used in the FGD process, adding cost and energy expenditure to the process. Kikkawa et al. (2002) tried to scrub SO 2 from FGD without limestone size …
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The synergistic effect of red mud – desulfurized gypsum - fly ash was found. • Sample RDFC6 achieved high content of solid waste and high mechanical performances. • The influence of synergistic effect on …
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The utilization of desulfurized building gypsum as raw material for gypsum-based self-leveling mortar (GSL) is limited by its low strength and poor water resistance. The objective of this study is to enhance comprehensive properties of GSL and prepare qualified desulfurized building gypsum-based self-leveling mortar that can be …
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The chemical reaction between the limestone slurry and sulfur in the flue gas produces calcium sulfate, while the limestone slurry is converted into a gypsum …
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ization gypsum. Unfortunately, these additives have negative effects on the mechanical properties of desulfurization gypsum, limiting the application and promotion of desulfur-ization gypsum material. In addition, adding insulating aggregates improves the thermal insulation performance of desulfurization gypsum, but reduces the mechanical ...
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This paper studies the effect of desulfurized gypsum and 1% hydrogen peroxide modified desulfurized gypsum on the setting time of Portland cement, and …
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The desulfurized building gypsum used in the test was provided by Chongqing Muchuan Gypsum Building Materials Co., Ltd., which was light yellow and had gelling properties after being mixed with water.The main chemical components and main physical performance indexes of desulfurized building gypsum are shown in Table 1 and Table 2. Table 1.
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