We value your feedback! Please complete the form below so that we can tailor our services to your specific needs.
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
Analysis of moisture infiltration in saline-alkali soil while adding desulfurized gypsum: GAO Xiaolong 1,2,3,4, WANG Youqi 1,2,3,4, BAI Yiru 1,3,4, RUAN Xiaohan 1,2,3 ...
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
Porous mineral materials were introduced into the preparation of gypsum board. The effects of porous mineral materials on the bonding properties and other mechanical properties of gypsum board ...
WhatsApp: +86 18221755073
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 ...
WhatsApp: +86 18221755073
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 ...
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 compressive strength of the sample with 10 % content is the highest at 28 d, which is 84.6 MPa. In 28d of hydration, with the increase of desulfurized gypsum content, the pore size of mortar decreases, so that the porosity decreases from 3.09 % to 1.52 %.
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
The extent of shrinkage reduction is contingent upon the gypsum content: a 2.5 % gypsum addition exhibits negligible effects on shrinkage reduction, whereas a 5 % gypsum inclusion can achieve a 10 % decrease in shrinkage compared to pure AAM [20], [21], [22]. Desulfurized gypsum (DSG), a by-product of flue gas desulphurization in thermal power ...
WhatsApp: +86 18221755073
Its main components are dihydrate gypsum and hemihydrate gypsum, which have good solubility and are similar to natural gypsum [29], [30]. There are few reports on the effect of different contents of desulfurization gypsum on the formation rate of ettringite. The role of desulfurization gypsum in BSAC hydration remains to be further studied.
WhatsApp: +86 18221755073
unreacted limestone is used instead of volume of particle as: This equation shows a fraction of dissolution of limestone having a same particle size in the batch reaction system.
WhatsApp: +86 18221755073
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 …
WhatsApp: +86 18221755073
The effects of desulfurized gypsum, heat-treated desulfurized gypsum and hydrogen peroxide modified desulfurized gypsum on the setting time of Portland cement were studied. …
WhatsApp: +86 18221755073
Dicarboxylic acid modifiers play a crucial role in the controlled synthesis of α-hemihydrate gypsum (α-HH) with an aspect ratio (AR) close to 1 from flue gas desulfurized (FGD) gypsum. However, the effect of dicarboxylic acid modifiers in the preparation of α-HH by FGD gypsum and the mechanism of action is unclear.
WhatsApp: +86 18221755073
The key to obtaining high-strength backfill is the cementing material used for backfilling. Therefore, to prepare a new slag-based binder for cemented tailings backfill, …
WhatsApp: +86 18221755073
The results show that adding desulfurized gypsum, which accounts for 6% to 8% of the total mass of the cementitious material, has no adverse effect on the workability and can significantly improve ...
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
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 calcining process), …
WhatsApp: +86 18221755073
produced from desulfurized gypsum for a range of industrial applications. In the experiment, fatty acids were used to modify the CaCO 3 surface, and the scale of the modification effect was
WhatsApp: +86 18221755073
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 ...
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
To study the effect of desulfurization gypsum (FGD) on improving the activity of the system. The results show that adding desulfurized gypsum, which accounts for 6% to 8% of the total mass of ... desulfurized gypsum mortar system has explored the composition of cement, FA, and FGD through experiments [4]. The cement content is initially set at
WhatsApp: +86 18221755073
However, semi-hydrated desulphurized gypsum mainly contained calcium sulfate dihydrate (CaSO 4 ·2H 2 O) and calcium sulfate hemihydrate (CaSO 4 ·1/2H 2 O). This phenomenon was caused by the effect of the calcination temperature on the phase change of desulfurized gypsum promoting the removal of crystalline water from dihydrate.
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
In order to control the rapidly rising air pollution and reduce its adverse effects on socio ... traditional raw materials, such as natural gypsum and OPC. ii) Investigate the various production techniques of FGD gypsum, including wet limestone, wet lime, and seawater scrubbing methods. ... (α-HH) gypsum using flue gas desulfurized gypsum is ...
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 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 the microstructure of materials was elaborated.
WhatsApp: +86 18221755073
Beyond the energy savings, this maintained a large size difference between the resulting gypsum and limestone, making it easier to separate the two. However, the use of granular limestone …
WhatsApp: +86 18221755073
Current study proposes an effective way to modify the properties of super-sulfated cement (SSC) paste and mortar with preheated flue gas desulfurization (FDG) gypsum at …
WhatsApp: +86 18221755073
