In this study, we investigated a coarse phosphogypsum containing 49.63% SO3, 41.41% CaO, 10.68%, 4.47% SiO2, 1.28% P2O5, 0.11% F, CaSO4·2H2O purity of 80.65%, and whiteness of 27.68. Phosphogypsum contains calcium sulfate dehydrate as the main mineral, with small amounts of brushite, quartz, muscovite, and zoisite. Harmful …

Semantic Scholar extracted view of "Deep removal of phosphorus and synchronous preparation of high-strength gypsum from phosphogypsum by crystal modification in NaCl-HCl solutions" by Qingjun Guan et al. ... (α-HH) whiskers provides a green alternative for the high-value-added recycling of flue gas desulfurization (FGD) …

To effectively solve the problem of recovery and utilization of flue gas desulfurized gypsum (FGDG), a new method for preparing SO2 gas by adding a mixture of FGDG and pyrite into a boiling furnace and utilizing its high-temperature waste heat is proposed. Using the FactSage 6.1 Reaction module and the Equilib module, the …

DOI: 10.1016/j.ijggc.2023.103843 Corpus ID: 256383669; Desulfurization gypsum carbonation for CO2 sequestration by using recyclable ammonium salt @article{Ding2023DesulfurizationGC, title={Desulfurization gypsum carbonation for CO2 sequestration by using recyclable ammonium salt}, author={Wenjin Ding and Jingyi Qiao …

1. Introduction. Desulfurization gypsum is an industrial by-product formed by desulfurization of flue gas generated by power plants, petrochemical plants, steel plants and other industries [1].China is the world's largest coal producer and consumer [2].The large consumption of coal leads to huge stockpiles of desulfurization gypsum [3].The …

The management of solid mine waste requires a detailed characterization and a full understanding of the reparation of elements in the origin rock and their distribution in the waste matrix (Elghali et al., 2018).It is now generally acknowledged that the distribution, mobility, availability, and toxicity of chemical elements are determined not …

DOI: 10.1016/J.PROENV.2016.02.112 Corpus ID: 101722382; Preparation of Calcium Sulfate Whisker by Atmospheric Acidification Method from Flue Gas Desulfurization Gypsum @article{Sun2016PreparationOC, title={Preparation of Calcium Sulfate Whisker by Atmospheric Acidification Method from Flue Gas Desulfurization Gypsum}, …

For use in the gypsum–sulfuric acid process, the humidity must be reduced as much low as possible. The kinetics of dehydration of phosphogypsum at various …

The extensive accumulation of phosphorus slag (PS) not only occupies land but also pollutes the environment. In the present study, calcium carbide slag (CS) and desulfurization gypsum (DG) were used to synergistically activate PS, and metakaolin (MK) was added to provide additional Al 2 O 3 for the cementitious system. The setting …

Gypsum is especially beneficial to clay soils and is also used to treat sodic soils. As a source of gypsum, phosphogypsum can and does substitute natural gypsum as a soil amendment in many countries, including Australia, Brazil, and Spain, to name a few. Studies have even found that the application of phosphogypsum can increase crop …

The use of phosphogypsum by valorization is an option. However, the high cost of purification makes it uneconomical and therefore is limited to 15% of the phosphogypsum produced globally (Maazoun and Bouassida, 2019). The remaining 85% of phosphogypsum results in continual amassing which leaves hazardous environmental …

An SEM photomicrograph showing the surface morphology of PG is given in Fig. 2. As can be seen, the surface of the parallelogram or rhombic crystal is rough, indicating that many small impurities have adhered to the PG …

Desulfurization gypsum, the byproduct from wet flue gas desulfurization, and red mud, from the production of aluminum oxide, are two bulk industrial solid wastes that trigger many local environmental problems in China. This study aims to jointly utilize them. Through experimentation and modeling using FactSage, it has been found to be …

Abstract Phosphogypsum (PG) is a calcium sulphate dihydrate and a by-product of the phosphate fertilizer industry. It is produced in huge quantities (300 MT/year), but only …

Phosphogypsum (PG) is a by-product produced during the wet process of phosphoric acid (H 3 PO 4) production from natural phosphate rocks. Approximately 4–6 …

DOI: 10.1016/J.ENERGY.2012.09.009 Corpus ID: 110852926; Mineral carbonation of flue gas desulfurization gypsum for CO2 sequestration @article{Lee2012MineralCO, title={Mineral carbonation of flue gas desulfurization gypsum for CO2 sequestration}, author={Myung-Gyu Lee and Young nam Jang and Kyung Won Ryu and Wonbeak Kim …

This paper aims to explore the potential use of flue gas desulfurisation gypsum (FGDG) and phosphogypsum (PG) into cemented paste backfill (CPB). The mechanical strength of CPB and the binder paste properties (i.e., hydration heat, hydration evolution, acid erosion resistance, and leachability) were investigated experimentally.

However, desulfurization gypsum has some own features as relatively finer solid size (60 μm), high water content (10–15%) and impurity, these have special effect on the utilization. The desulfurization gypsum are widely utilized in cement retarder, building material, embedment and neutralizer or regulator of soil in agriculture [3, 4].

Abstract. The past several years have witnessed great progress in utilization of industrial waste gypsum. 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 of systematic reviews reporting the most …

Three significant industrial gypsum by-products are flue-gas desulfurization gypsum (FGDG) [13], which is produced from coal combustion after the wet desulfurization of flue gas; phosphogypsum (PG ...

Phosphogypsum (PG) is the by-product of phosphoric acid plants. The PG dissolves faster, produces an acidic reaction, generates leaching solution with higher electrolyte …

Phosphogypsum is a by-product of the phosphate fertilizer industry. It is generally treated by stacking, which not only causes environmental pollution, but also wastes resources. …

The production of flue gas desulfurization gypsum poses a serious threat to the environment. Thus, utilizing gypsum-based self-leveling mortar (GSLM) stands out as a promising and effective approach to address the issue. β-hemihydrate gypsum, cement, polycarboxylate superplasticizer, hydroxypropyl methyl cellulose ether (HPMC), retarder, …

Flue gas desulfurization (FGD) gypsum is an industrial by-product of the desulfurization process. The gross product of FGD gypsum has reached 550 million tons in China by 2016 and quite a portion ...

The purpose of this paper is to investigate the thermodynamic condition of the desulfurization process of phosphogypsum (PG). Theoretical approach and …

According to the U.S. Energy Information Administration's statistics, in the 2006–2016 period, approximately 42% of the electricity consumed in the U.S.A was produced by coal combustion (U.S. Energy Information Administration, 2018).The coal combustion process generates various types of residues such as fly ash, bottom ash, …

DOI: 10.1016/J.CONBUILDMAT.2020.122170 Corpus ID: 233634265; Recycling flue gas desulfurisation gypsum and phosphogypsum for cemented paste backfill and its acid resistance @article{Zhang2021RecyclingFG, title={Recycling flue gas desulfurisation gypsum and phosphogypsum for cemented paste backfill and its acid …

Semantic Scholar extracted view of "The using of waste phosphogypsum and natural gypsum in adobe stabilization" by N. Değirmenci ... The Properties of Modified Adobe Materials with Desulfurization Waste. Xing-wen Jia Ya Zhang ... on the swelling potential of an expansive soil from Oman. A. Al-Rawas A. Hago Hilal Al-Sarmi. …

The synthesis of α-calcium sulfate hemihydrate (α-CSH) from flue gas desulfurization (FGD) gypsum is a good way to realize the comprehensive utilization of FGD gypsum.To obtain α-CSH with the satisfactory performances, a facile hydrothermal-aging pretreatment process for FGD gypsum raw materials was proposed, where FGD …

Most of the gypsum waste produced by industry is unsuitable for further use, e.g. production of plasterboard. These stockpiles create environmental concerns such as …