Effects of Fluorogypsum and Flue-Gas Desulfurization Gypsum …

In order to explore the influence of the types of waste gypsum on the properties of alkali slag cement, fluorogypsum (FG) and flue-gas desulfurization (FGD) gypsum were comparatively investigated. Moreover, the action mechanisms of FG and FGD gypsum on the properties of alkali slag cement were analyzed. The results show that both the FG and FGD …

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FACTORS EFFECTING EFFICIENCY PREDICTION OF …

FACTORS EFFECTING EFFICIENCY PREDICTION OF LIMESTONE-GYPSUM WET FLUE GAS DESULPHURIZATION BASED ON OXIDATION REACTION ... Theoretical investigations for effects of various operative variables on the SO 2 ... Desulfurized mineral (CaSO 4) is generated once the suspension that absorbs SO 2 below the scrubber is dehydrated (Koralegedara et al ...

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Effect of Industrial Byproduct Gypsum on the Mechanical …

1. Introduction. BPG is an industrial solid waste primarily composed of calcium sulfate. Its main components include desulfurized gypsum (DG), phosphogypsum (PG), and titanium gypsum (TG), with smaller amounts of fluorogypsum, salt gypsum, and others [1,2,3].Figure 1 shows the distribution proportions of BPG sources in China. BPG contains various impurities and harmful …

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Desulfurization gypsum uses and properties

The grindability of desulfurized gypsum is better than natural gypsum, and the desulfurized gypsum itself is a fine powdery material. When grinding, it has a grinding effect on clinker and other mixed materials, make the cement with much more fine particles and a significantly larger specific surface.

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Modeling of the wet flue gas desulfurization system to utilize low

Wet flue gas desulfurization was simulated to improve gypsum production using low-grade limestone. High-grade limestone with 94 wt% CaCO3 content is used for producing …

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Effect of Polyethylene-Grafted Maleic Anhydride on the

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 [].The gross production of …

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FACTORS EFFECTING EFFICIENCY PREDICTION OF …

incorporates a high desulfurization potency and produces desulfurized mineral as a by-product. WFGD may be a methodology of riveting absorb SO 2 through a vapor–liquid contact by …

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Effect of desulphurization gypsum on hardening mechanism of the

Desulphurization gypsum (DG) is the by-product of wet desulphurization of flue gas in power plant, with a large yields and low resource utilization rate. However, it is rich in CaSO4·2H2O. This work reused the DG for the activation of steel slag (SS)-alkalied-granulated blast furnace slag (GBFS) and produced a DG–SS–GBFS-based geopolymer. The …

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Effect of Polyethylene-Grafted Maleic Anhydride on the …

Download Citation | Effect of Polyethylene-Grafted Maleic Anhydride on the Properties of Flue-Gas Desulfurized Gypsum/Epoxy Resin Composites | Waste resource utilization can save energy, reduce ...

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Potential of desulfurized gypsum as a sulfate alternative in …

Yi P., Du H., Chai C., Li Y., Hu Y., Sun X., Li Y., Xing Feng Potential of desulfurized gypsum as a sulfate alternative in preparing solid waste-based limestone calcined clay cement (LC3) and its effects on early properties // Journal of Building Engineering. 2024.

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Mechanical Properties and Coagulation Characteristics of Flue …

In the limestone gypsum flue gas desulfurization process, 2.7 ton of desulfurized gypsum can be generated for each 1 ton of SO 2 removed . ... The resulting product still met building requirements. Yang et al. studied the effect of desulfurized gypsum on the properties of calcium sulfoaluminate cement. The results showed that FGDG can improve ...

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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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Integrated Assessment of the Environmental and Economic Effects …

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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Integrated Assessment of the Environmental and …

To solve the problems of difficult treatment of desulfurized gypsum and overmining of limestone, a kind of lime/gypsum flue gas desulfurization …

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The effects of desulfurized gypsum on the mechanical properties …

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) of stabilized DC …

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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. ... Effect of desulfurization gypsum dosage on uniaxial compressive strength of filling body. ... Comparison of properties of steel slag and crushed limestone aggregate ...

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Application of desulfurization gypsum as activator for modified

Desulfurization gypsum (DG) is an industrial by-product of limestone-gypsum wet desulfurization of coal-fired flue gas, which is usually ... The chemical effect is mainly due to the similar ionic radius and the ... fly ash and desulfurized gypsum based eco-friendly road base materials. J. Clean. Prod., 284 (2021), Article 124777. View PDF ...

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Synergistic effect of red mud, desulfurized gypsum and fly ash in

Synergistic effect of red mud, desulfurized gypsum and fly ash in cementitious materials: Mechanical performances and microstructure. November 2023; Construction and Building Materials 404(5):133302;

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Recent advances in flue gas desulfurization gypsum processes …

After one year at a gypsum rate of 20 Mg ha −1, soil treated with FGDG had pH levels lower than the untreated soil, and lower than the soils treated with natural gypsum, because natural gypsum has a higher CaCO 3 content, hence a higher ANC. The authors reported relatively high Hg content in FGDG amended soil, but no significant difference ...

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Production and resource utilization of flue gas desulfurized …

Flue gas desulfurized gypsum mainly comes from thermal power plants, smelters, and large-enterprise boilers, and contains industrial by-products produced through a wet …

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Summary of research progress on industrial flue gas desulfurization

Research on the application of gas-liquid mass transfer and desulfurization gypsum in the limestone-gypsum process has shown that the desulfurization rate can reach as high as 99.46% [102]. Desulfurized gypsum can not only improve saline-alkali soils and increase crop yields; it can also be used as an additive to make cement, concrete, wall ...

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Application of flue gas desulfurization gypsum improves multiple

Flue gas desulfurized gypsum (FGD gypsum), mainly originates from thermal power plants, smelters, and large-scale enterprise boilers. This article reviews the production in China and the latest beneficial utilizations of FGD gypsum. China is a large coal-consuming country and has always had serious SO 2 emissions. Therefore, the Chinese ...

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Production and resource utilization of flue gas desulfurized gypsum …

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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Experimental study of permeability evolution in modified

The wet limestone-gypsum powder desulfurization technology is used in coal-fired power plants (Cui et al., 2021; ... This study focuses on the influence of groundwater seepage; however, to better realize the usage and effect of modified desulfurized gypsum in the design of spray layer support structure, the follow-up research will include ...

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A comprehensive review of flue gas desulphurized gypsum: …

In order to control the rapidly rising air pollution and reduce its adverse effects on socio-economic development, a few key steps were taken by the ... such as natural gypsum and OPC. ii) Investigate the various production techniques of FGD gypsum, including wet limestone, wet lime, and seawater scrubbing methods. iii) Examine the potential ...

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Research on optimizing performance of desulfurization-gypsum …

The undisturbed desulfurization gypsum used in the experiments was obtained by natural air drying for 14 d, crushed by a crusher, and then passed through a 0.15-mm square-hole sieve. The obtained semi-aqueous desulfurized gypsum was the original desulfurized gypsum, which was placed in an oven at 180 °C and

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Effect of Flue Gas Desulfurization Gypsum on the Properties of …

This work aims to investigate the effect of additional flue gas desulfurization gypsum (FGDG) on the properties of calcium sulfoaluminate cement (CSAC) blended with ground granulated blast furnace slag (GGBFS). The hydration rate, setting time, mechanical strength, pore structure and hydration products of the CSAC-GGBFS mixture containing FGDG were …

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Integrated Assessment of the Environmental and Economic Effects …

To solve the problems of difficult treatment of desulfurized gypsum and overmining of limestone, a kind of lime/gypsum flue gas desulfurization (FGD) collaborative desulfurized gypsum resource utilization process (LCS) was proposed. The system mainly includes the LCS-LFGD (lime/gypsum flue gas desulfurization system), LCS-C (desulfurized gypsum reduction …

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Effects of different gypsum varieties on the hydration and …

Red mud (RM) is the major waste with strong alkaline discharge produced in alumina manufacturing. The main chemical compositions are Fe 2 O 3, Al 2 O 3, and SiO 2, which are similar to those of the raw materials for SAC.RM is a kind of waste with large output and serious pollution, and its effective disposal is the important problem facing the environment at …

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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. However, during the past decade, the rate of beneficially used FGDG has gradually …

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