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.
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 ...
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 …
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 …
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). Sintering process made red mud and desulfurized gypsum whiskers adhere evenly and closely, inducing the spilling out ...
Desulfurized building gypsum (DBG) has great application potential and can be used to produce lightweight plastering gypsum (LPG). In this work, DBG was modified by adding different proportions of ...
The 11 major electricity-generating coal combustion stations in the northern Great Plains have the potential to produce almost 1 million Mg of flue gas desulfurization gypsum …
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 ...
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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.
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 …
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The desulfurized gypsum storage and transportation system comprises a gypsum warehouse, a traveling crane lifting appliance and a transport vehicle. The gypsum storehouse includes windrow district and loading district, windrow district top is equipped with the blanking mouth, the loading district includes through the isolated upper and middle ...
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Wang, Potential flue gas desulfurization gypsum utilization in agriculture: a comprehensive review, Renew. Sustain. Energy Rev., № 82, с. 1969
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Fly ash and desulfurized gypsum used in this experiment were from Shanxi Power Generation Co., Ltd. The coal gangue came from Yangquan, Shanxi. The cement was ordinary 42.5 cement sold on the market. The main chemical components of red mud, fly ash and desulfurized gypsum were analyzed by XRF, and the results are shown in Table 1.
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Flue gas desulfurization gypsum (FGDG) is an effective soil amendment. However, some heavy metals present in FGDG may enter soil or groundwater due to surface rainfall, …
In this paper, by analysing the gypsum crystal morphology, particle size distribution, hydration heat, dimensional change rate, and morphology change of hydration …
Comparative Analysis of Hydration Expansion Performance of Desulfurized gypsum-baseda/β Gypsum. Jixiu Zhang 1, Ye Zhang 1, Yuanchao Miao 1 and Saihong Duan 1. ... Gypsum has micro-expansion characteristic during the process of hydration and solidification, and there are certain differences in the hydration expansion characteristics of ...
As we know, coal is the dominant energy in Chinese energy mix. Almost all of the coal-fired power plants are required to equip desulfurization facility to remove SO 2 in the flue gas, as illustrated in Fig. 1.The most popular desulfurization technology is wet-FGD using limestone, with the product called FGD-gypsum, which main content is CaSO 4. ...
Gypsum powder is one of the five major gel materials, occupies an important position in the national economy, widely used in construction, building materials, industrial molds and art models, chemical industry and agriculture, food processing and medicine beauty and many other applications, is an important industrial raw materials.
The invention discloses a method for preparing cement with red mud and desulfurized gypsum. The cement comprises the following raw materials by weight percent: 50-70% of red mud which is processed through dealkalization and iron separation, 5-15% of desulfurized gypsum and 20-40% of limestone; the method comprises the following steps: proportioning, grinding the raw …
Tan et al. studied the process parameters of direct wet mineralization of CO 2 with desulfurized gypsum and established a reaction model of direct wet mineralization of CO 2 with desulfurized gypsum in an ammonia medium system. 60 There is a competition between the CO 2 absorption reaction and NH 2 COO − hydrolysis reaction, in which the CO 2 ...
Influence of Reaction Parameters on Solid Outputs in CO 2 Mineralization of Desulfurized Gypsum. Yu Dou 1,2, Wenxuan Wang 3, Chunlei Fan 4, ... Flue gas desulfurization gypsum …
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The Desulfurized Gypsum Market size was valued at USD xx.x Billion in 2023 and is projected to reach USD xx.x Billion by 2031, growing at a CAGR of xx.x% from 2024 to 2031.. Desulfurized Gypsum ...
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Germany Desulfurized Gypsum Market By Application Construction Agriculture Cement Production Waste Management Others Desulfurized gypsum, a byproduct of flue gas desulfurization in power plants ...
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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; the roughage is then subjected to anaerobic fermentation by lactic acid bacteria, which results in the generation of SG [19].
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