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 ...
WhatsApp: +86 18221755073
To solve the problems of difficult treatment of desulfurized gypsum and overmining of limestone, a kind of lime/gypsum flue gas desulfurization …
WhatsApp: +86 18221755073
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 ...
WhatsApp: +86 18221755073
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 FGDG due to the ...
WhatsApp: +86 18221755073
Abstract: The massive accumulation of flue gas desulfurization (FGD) gypsum produced in the wet limestone-gypsum flue gas desulfurization process not only encroaches on lands but also …
WhatsApp: +86 18221755073
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 …
WhatsApp: +86 18221755073
With the same main composition (CaSO 4 ·2H 2 O) as natural gypsum, FGD gypsum can be used as an admixture or setting retarder in cement-based materials. Wansom et al. [3] demonstrated that the presence of FGD gypsum favors the formation of ettringite (AFt) in the initial hydration stage, which precipitates on the surface of C 3 A particles and thereby …
WhatsApp: +86 18221755073
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 …
WhatsApp: +86 18221755073
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 …
WhatsApp: +86 18221755073
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 …
WhatsApp: +86 18221755073
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 …
WhatsApp: +86 18221755073
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.
WhatsApp: +86 18221755073
Red mud (RM), fly ash (FA) and desulfurized gypsum (DG) are harmful solid wastes that need to be treated. In this study, RM, FA, DG were used as the main raw materials to prepare road base materials based on the different (CaO + Na 2 O)/(SiO 2 +Al 2 O 3) molar ratio, and its mechanical properties, durability, microstructure and environmental performance were …
WhatsApp: +86 18221755073
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
WhatsApp: +86 18221755073
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 ...
WhatsApp: +86 18221755073
Yi P. et al. 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 …
WhatsApp: +86 18221755073
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, …
WhatsApp: +86 18221755073
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;
WhatsApp: +86 18221755073
The semi-hydrate content of desulfurized gypsum is adjusted as a natural plaster substitute for producing gypsum board, wallboard [107].The modified treatment of desulfurized gypsum with cement, inorganic waste, straw fiber and other wastes can be used to manufacture high-insulation and compression-resistant wall materials [108].Desulfurized gypsum is incorporated into the …
WhatsApp: +86 18221755073
The effects of adding an organic acid or using a limestone with a fine particle size distribution (PSD) have been examined in a wet flue gas desulphurisation (FGD) pilot plant.
WhatsApp: +86 18221755073
Desulfurized gypsum exhibits lower sulfate content and higher solubility than natural gypsum. The effect of desulfurized gypsum on the hydration, workability and strength development of LC 3 are studied. The heat evolution of LC 3 is closely related to its moisture …
WhatsApp: +86 18221755073
Semantic Scholar extracted view of "Potential of desulfurized gypsum as a sulfate alternative in preparing solid waste-based limestone calcined clay cement (LC3) and its effects …
WhatsApp: +86 18221755073
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 ...
WhatsApp: +86 18221755073
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 …
WhatsApp: +86 18221755073
Flue gas desulphurisation gypsum (FGDG) mainly refers to the solid by-product produced via lime gypsum desulphurisation that is performed in various industries to treat flue gas after the combustion of sulphur-containing fuels, such as coal and petroleum [1].In the limestone gypsum flue gas desulphurisation process, 2.7 tons of FGDG can be produced for every 1 ton …
WhatsApp: +86 18221755073
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
WhatsApp: +86 18221755073
Limestone and gypsum particles are slightly soluble in water and therefore, 99.7% alcohol was used as the dispersive phase of the experiment. An electrical low-pressure impactor (ELPI, Dekati Ltd., Finland) was used to determine the real-time concentration and size distribution (range = 0.030–9.314 μm; aerodynamic diameter based on the ...
WhatsApp: +86 18221755073
SAC is produced by the calcination of limestone, alumina, and gypsum. Compared to OPC, a reduced amount of limestone is required [15] ... Future research should further investigate the effects of desulfurized gypsum on the different properties of BSAC, such as tensile strength, durability, and volume stability, while establishing the ...
WhatsApp: +86 18221755073
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.
WhatsApp: +86 18221755073
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 ...
WhatsApp: +86 18221755073
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 …
WhatsApp: +86 18221755073
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 ...
WhatsApp: +86 18221755073
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 …
WhatsApp: +86 18221755073