Desulfurized Gypsum Source

According to Table 3, the addition of 1% porous mineral material to the desulfurized gypsum had little effect on the initial setting time and the final setting time of the desulfurized gypsum ...

Desulfurization gypsum is a substance with calcium sulfate as the main component obtained by forced oxidation reaction after the countercurrent mass transfer of flue gas and desulfurizer slurry in the desulfurization reaction …

Effect of the nanosilica source on the rheology and early-age hydration of calcium sulfoaluminate cement pastes. Constr. Build. Mater., 327 (2022) 126942-Google Scholar. ... Preparation, characterization and application of red mud, fly ash and desulfurized gypsum based eco-friendly road base materials. J. Clean. Prod., 284 (2021), Article 124777.

Flue Gas Desulphurized Gypsum (FGDG) is a by-product generated by the thermal power industry to remove sulfur dioxide (SO 2) from flue gas emissions. This paper …

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 ...

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 lack of reusing methods. Also, the waste fly ash (WFA) is another waste material from the power plant.

This gypsum source is more reasonably priced and more readily available than natural gypsum in Wisconsin. The EPA and USDA are encouraging farmers to consider use of this gypsum source for land application. ... Use of a wet scrubber results in the byproduct flue gas desulfurized (FGD) gypsum. Currently, FGD gypsum represents one of the largest ...

In this sense, silage (SG) and flue gas desulfurized gypsum (FGDG) are two good choices as composting additives. SG is made from the roughage obtained by cutting corn, sorghum, and other forage crops and grass; ... it can function as a nutrient source for the microorganisms responsible for GW degradation during composting [26].

To prepare the TS-FGD-OPC composite solidifiers, the titanium slag content varies from 50 to 80 percent, the desulfurized gypsum content is kept constant as 20 percent to provide enough sulfate source, and accordingly the Portland cement content varies from 30 to 0 percent.

These data implied that FA was the main source of Si 2+ and Al 3+ monomers for the two gel products, and GGBS was the main source of Ca 2+ monomer for C-(A)-S-H gel. The addition of DG can promote the generation of AFt. ... fly ash and desulfurized gypsum based eco-friendly road base materials. Clean. Prod., 284 (2021), Article 124777, 10.1016 ...

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, …

The resulted optimum factor was the mass ratio of red mud / desulfurized gypsum whiskers as 2:1 with silane-coupling agent dosage as 0.1% at 900 °C, and the maximum absorption capacity of Pb(II) reached 173 mg.g−1 (at 298 K). ... indicated that mineral precipitation was another vital source of Pb(II) adsorption. Many research reports have ...

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.

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 ...

The embodiment of the invention discloses a desulfurized gypsum calcining device using natural gas as a heat source, which comprises a crushing mechanism, a feeding mechanism, a combustion mechanism, a discharging mechanism and a tail gas treatment mechanism, wherein high-temperature tail gas discharged by the tail gas treatment mechanism is used for drying …

The accumulation of a large amount of flue gas desulfurized gypsum (FGDG) not only occupies valuable land resources, but also the harmful substances such as fluorine and heavy metals in FGDG may increase environmental risks. ... Phosphogypsum is also a major source of industrial waste gypsum. Laasri et al. tested thermal reduction of ...

Desulfurized gypsum and carbide slag were produced in Gongyi City, Henan Province, ... Calcination of calcium sulphoaluminate cement using flue gas desulfurization gypsum as whole calcium oxide source. Constr. Build. Mater., 228 (2019), Article 116676, 10.1016/j.conbuildmat.2019.116676.

This study aims to develop binary and ternary gypsum binders based on using the gypsum waste from the Flue Gas Desulphurization in Power Plants (Flue Gas Desulfurization …

Newly developed carbonation technology toward CaCO 3 preparation also reveals a significant utilization way to recover high-value products from waste gypsum, whereas there is a shortage …

population country in the world, agricultural soil is an important source of greenhouse gas emissions. In recent years, unreasonable agricultural ... desulfurized gypsum, aeolian sand, soil CO 2 and N 2O emission fluxes, comprehensive greenhouse effect salinized soil, comprehensive greenhouse effect

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 …

Analysis of chemical compositions and micro- structure of dry desulfurized gypsum Table 1 shows the chemical compositions of the dry desul- furized gypsum produced by H Company …

Thermal Power Plant generates FGD gypsum as by-product during coal combustion. This study evaluates the characterization (spectroscopic and elemental), potentially toxic elements (PTEs)...

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 …

Saline-sodic soil colloids contain a large number of exchangeable sodium ions,leading to soil aggregates breakdown,clay dispersion and soil pores blocking.Saline-sodic soils improvement requires two processes,providing calcium source to exchange with sodium on soil surface and removing salt through leaching or drainage.In this study,we used corn straw and desulfurized …

Flue Gas Desulphurized Gypsum (FGDG) is a by-product generated by the thermal power industry to remove sulfur dioxide (SO 2) from flue gas emissions. This paper provides a …

The desulfurized gypsum sample was sourced from a coal-fired power plant. Initially, the samples were dried in an oven at 45°C for 24 hours to eliminate external moisture. After drying, the primary chemical composition of the desulfurized gypsum, as displayed in Table 1, consisted predominantly of CaSO 4 ·2H 2 O at

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, …

Desulfurized gypsum contains partially unreacted CaCO 3 and partially soluble salts, such as potassium salts and sodium salts. The presence of these impurities promotes the hydration process of cement. Meanwhile, these impurities can also stimulate the activity of the mixed materials, which is conducive to the development of cement strength in ...

FGD gypsum is also highly soluble, which makes it a good source of calcium and sulfur for plants. The solubility of FGD gypsum can be adjusted by changing its particle size, which makes it possible to tailor FGD gypsum to specific applications [4]. ... The controlled synthesis of α-hemihydrate (α-HH) gypsum using flue gas desulfurized gypsum ...