A brief review on flue gas desulfurization gypsum recovery toward
The most common application of FGDG is to directly use it in civil infrastructure materials. 11–14 The main component of FGDG is CaSO 4 ·2H 2 O with purity more than 90%. 15,16 Thus, it is an ideal material to replace natural gypsum. 17,18 Currently, about 70% of the total FGDG is used as raw material to produce wallboard, gypsum board, whitewashing, cement and concrete in the …
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Development of slag-based filling cementitious materials and their
The experimental analysis revealed that the influence of the desulfurized gypsum content on the strength at 3, 7, and 28 days is greater than that of the cement clinker content. Integrating the results from the orthogonal experiment and the RBF neural network predictions, the optimal mix ratio was identified as 11 % desulfurized gypsum, 12 % ...
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Production and resource utilization of flue gas desulfurized gypsum …
The main utilization method of FGD gypsum is still used in construction materials (Ye et al., 2019). As an auxiliary material or instead of natural gypsum, it can be widely used in concrete, walls, concrete, etc. It is the best way to use desulfurized gypsum in large quantities, but its economic value is relatively low (Pedreno-Rojas et al., 2020).
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Recent advances in flue gas desulfurization gypsum processes …
Flue gas desulfurization gypsum (FGDG) is an industrial by-product generated during the flue gas desulfurization process in coal-fired power plants. Due to its abundance, chemical and physical properties, FGDG has been used in several beneficial applications.
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The Effects of Combined Retarders on the Properties of Desulfurized Gypsum
Abstract. As a relatively fast-setting building material, desulfurized gypsum is difficult to use. Citric acid, sodium gluconate, and sodium tripolyphosphate were used to design and prepare a desulfurized gypsum paste containing single or combined retarders. The effects of the retarder type and content on the setting inhibition and mechanical properties of desulfurized …
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Study on desulfurized gypsum used as cement retarder
Effect of desulfurized gypsum treated with hydrogen peroxide on setting time of Portland cement 3.4. The influence of the mixture of desulfurized gypsum and natural gypsum on the setting time of ...
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Application of Flue Gas Desulfurization Gypsum and …
F lue gas desulfurization gypsum (FGDG) is a synthetic gypsum that is created during the removal of SO 2 from flue gas by reacting the SO 2 with calcite (CaCO 3) to form calcium sulfite (CaSO 3 ·0.5H 2 O), which is further …
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A comprehensive review of flue gas desulphurized gypsum: …
Moreover, the solid waste desulfurized gypsum is used as a sulfate activator. The macroscopic experimental results show that the addition of 2 % biochar can reduce the fluidity of composites by 12.5 % but increase the 28-day compressive and flexural strength by 10.3 % and 19.1 %, respectively. Hydration heat analysis show that biochar can ...
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Application of Flue Gas Desulfurization Gypsum and …
Flue gas desulfurization gypsum and CG were applied by hand after planting but before plant emergence without incorporation to individual plots (3 m × 3 m) at rates of 0, 2.24, 11.2, and 22.4 Mg ha −1 in a randomized, complete …
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Steering the early strength of clinker-free cementitious mortar by
The binders used in this study included granulated blast furnace slag (GBFS), steel slag (SS) and desulfurized gypsum (DG). Wet DG was provided by a thermal power plant, SS and GBFS were provided by a steel smelting facility in Shanxi province. The chemical compositions of the above raw materials are shown in Table 1.
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USE OF ANIMAL WASTE AND FLUE GAS DESULFURIZED …
453 USE OF ANIMAL WASTE AND FLUE GAS DESULFURIZED GYPSUM TO IMPROVE FORAGE PRODUCTION ON RECLAIMED MINE SOIL IN MISSISSIPPI1 J. J. Read2, A. Adeli, and D. J. Lang Abstract: Knowledge of plant responses to animal or industrial byproducts is needed for effective use of these potential amendments on reclaimed mine soil.
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Beneficial Use Evaluation of Flue Gas Desulfurization (FGD) Gypsum …
Below is the Beneficial Use Evaluation of FGD Gypsum in Agriculture and the supporting database. Beneficial Use Evaluation of FGD Gypsum in Agriculture (pdf) (13.15 , March 2023, EPA 530-R-23-004) Flue Gas Desulfurization Gypsum Constituent Database (accdb)
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Full article: Cover Crop Complements Flue Gas …
FGD-gypsum and cover crop effects on soil physical properties. Bulk density (ρb), as a measure of soil compaction, was significantly affected by FGD-gypsum and cover crop managements (Table 7). FGD-gypsum …
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Effects of hybrid fibers on properties of desulfurized gypsum …
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 tons of FGDG were produced in 2019, …
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Effect of Mineral Admixtures on Physical, Mechanical, and
Thus, utilizing gypsum-based self-leveling mortar (GSLM) stands out as a promising and effective approach to address the issue. β-hemihydrate gypsum, cement, …
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Improvement in Water Resistance of Desulfurized Gypsum …
gypsum was divided into deta il, and its comprehensive utili-zation status was analyzed.14) Secondly, some progress has been made in the research of desulfurized gypsum as a waterproofing agent, and a new type of building gypsum-based waterproofing agent has been prepared.15) In addi-tion, a new type of high-efficiency inorganic composite
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A brief review on flue gas desulfurization gypsum recovery toward
Tan et al. studied the process parameters of direct wet mineralization of CO 2 with desulfurized gypsum and established a reaction model of direct wet mineralization of CO 2 with desulfurized gypsum in an ammonia medium system. 60 There is a competition between the CO 2 absorption reaction and NH 2 COO − hydrolysis reaction, in which the CO 2 ...
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Preparation, characterization and application of red mud, fly ash …
DOI: 10.1016/j.jclepro.2020.124777 Corpus ID: 226335113; Preparation, characterization and application of red mud, fly ash and desulfurized gypsum based eco-friendly road base materials
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Development and Application of Flue Gas Desulfurized Gypsum …
The grouting technique is an efficient method for enhancing the stability of cracked slopes through the use of grouting materials. Conventional cement-based grouting materials are costly, energy-intensive, and environmentally damaging. Additionally, cement-hardening slurry is prone to cracks between …
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Production and resource utilization of flue gas desulfurized …
Flue gas desulfurized gypsum (FGD gypsum), mainly originates from thermal power plants, smelters, and large-scale enterprise boilers. This article reviews the production in …
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Research on optimizing performance of desulfurization-gypsum …
The obtained semi-aqueous desulfurized gypsum was the original desulfurized gypsum, which was placed in an oven at 180 °C and dehydrated for 2 h under synchronous heating with the box. The microscopic morphology of desulfurization gypsum from SEM and XRD analysis is shown in Fig. 1. The original desulfurization gypsum featured rhombic blocks ...
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Desulfurization gypsum uses and properties
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 generated after combustion of sulfur-containing fuel (coal, oil, etc.), and its composition is calcium sulfate dihydrate (CaSO4.2H2O).
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Effect of Mineral Admixtures on Physical, Mechanical, and
Desulfurization building gypsum underwent production at 170–190 °C, followed by aging before use. The performance characteristics of desulfurization building gypsum are detailed in Table 1 and Figure 1. As shown in the figure, the main mineral phases of desulfurization building gypsum are hemihydrate gypsum and a small amount of anhydrous ...
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Potential of desulfurized gypsum as a sulfate alternative in …
DOI: 10.1016/j.jobe.2024.111335 Corpus ID: 274039786; Potential of desulfurized gypsum as a sulfate alternative in preparing solid waste-based limestone calcined clay cement (LC3) and its effects on early properties
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Influence of crystal-transforming agent on the performance and
Desulfurized gypsum is used primarily in construction, agriculture, the chemical industry, and other ... and observe the phase of the sample. And the X Pert PRO MPD X-ray diffractometer (XRD) manufactured by the German Brooke Technology Co., Ltd. The X-ray source is primarily composed of Cu target K rays, with a voltage of 40 kV, a current of ...
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Potential of desulfurized gypsum as a sulfate alternative in …
Desulfurized gypsum (DG) presents significant challenges in recycling with the rapid development of industrialization. To explore the feasibility of DG as a sulfate source in producing limestone calcined clay cement (LC3), this study investigates the differences between LC3 samples containing DG and those containing natural gypsum (NG) in terms of hydration, …
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desulfurized gypsum, also known as FGD gypsum
Desulfurized gypsum is a by-product of the FGD process, a technology that uses lime-limestone to recover sulfur dioxide from flue gas from burning coal or oil.
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(PDF) Use of Flue Gas Desulfurization Gypsum, …
This research aims to study the utilization of waste from power plants, construction and demolition, and agriculture by varying the ratios of flue-gas desulfurization (FGD) gypsum, construction...
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Characterization and optimization of desulfurized construction gypsum
The rapid expansion of coal-fired power plants has led to a significant increase in the production of flue gas desulfurization (FGD) gypsum, a byproduct of sulfur dioxide emission control processes [1], [2].With annual global output reaching millions of tons, FGD gypsum poses substantial environmental challenges due to its large-scale accumulation and potential …
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Influence of Calcined Flue Gas Desulfurization Gypsum and …
The recent beneficial use of FGD gypsum is in wallboard production, concrete/cement and asphalt production, CaCO3 production, and the production of calcium sulfate. ... At present, the industrial utilization of desulfurized gypsum has become one of the main research directions of scholars. Comprehensive utilization of desulfurized gypsum ...
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