No. 1688, Gaoke East Road, Pudong new district, Shanghai, China.
No. 1688, Gaoke East Road, Pudong new district, Shanghai, China.
Flue gas desulfurized gypsum (FGDG) is an industrial by-product discharged from thermal power plants, smelters, and large-scale enterprise boilers. ... (C–S–H) wrapping around the gypsum crystals, which prevents the dissolution of gypsum and further hinders the generation of delayed ettringite (Kovler, 1998). Based on this, the FGDG-based ...
A substantial amount of desulfurized gypsum is generated as a by-product of limestone gypsum flue gas desulfurization systems. According to statistical data, in 2020, the desulfurized gypsum emissions of China reached about 147 million ton, which increased to more than 161 million ton in 2021 and continues increasing [ 5 ].
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 ...
[1] Yu D. G., Yang X. Y. and Yang S. Z. 2006 A Research on the Properties and Microstructure of Hemihydrate Gypsum Journal of Wuhan University Technology 28 27-29 Google Scholar [2] Kong Y. S., Zhang J. Z. and Kong R. Q. 2016 Researches on Copper Alloy Plaster Precision Casting Process Foundry Technology 37 1071-1073 Google Scholar [3] Wang Q. …
The results showed that the application of desulfurization gypsum could reduce the harm of salt and alkali in soil to the germination, emergence and growth of millet seeds. ... Desulfurized gypsum ...
The desulfurized gypsum not only has a high content of gypsum (> 900 g kg − 1) but also has a low price < 50¥ t − 1. We therefore conducted a study to determine how effective desulfurized gypsum is at reducing sodicity, improving the physical and chemical properties of the soil, and improving the growth and yield of rice in these saline ...
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...
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 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 …
Desulfurized ash contains about 21.33% hemihydrate calcium sulfite, 18.11% calcium carbonate, 28.55% dihydrate gypsum, 25.81% calcium hydroxide, 1.85% calcium oxide. Particle size distributions of hemi-hydrate gypsum and desulfurized ash are given in Fig. 1 A. The specific surface areas of desulfurized ash and hemihydrate gypsum are 351 and
Background Gypsum is a valuable resource for farmers, supplying essential calcium and sulfur for plant growth. It serves as a crucial soil amendment, particularly in reclaiming alkali and sodic soils. While not a material, gypsum is widely recognized as a nutrient source for calcium and sulfur in acidic soils. The presence of calcium in various crops growing in acidic …
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 CaSO …
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 …
From the experiment, it was found that the highest compressive strength of concrete brick specimens was 45.18 MPa, which was produced from 5.5% gypsum without CDW and OPT, while 26.84 MPa was the ...
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 ...
Three batches of desulfurized gypsum with different chloride ion content were used to prepare gypsum board. According to JC/T 2074-2011 "Flue Gas Desulfurization Gypsum", the chloride ion contents in
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 ...
The stockpiling of phosphogypsum is a waste of land resources and also causes serious pollution to natural resources such as water and atmosphere. This paper explores the mechanism of efficiently modified phosphogypsum and constructs a model and evaluation system for heavy metal leaching and migration transformation. The modified phosphogypsum is used …
Coal is one of the major sources of energy for power generation in the world 1,2.The burning of coal releases many harmful gases (SO x, NO x), particulate matter, and heavy metals (HMs) into the ...
The utilization of desulfurized building gypsum as raw material for gypsum-based self-leveling mortar (GSL) is limited by its low strength and poor water resistance. The objective of this study is to enhance comprehensive properties of GSL and prepare qualified desulfurized building gypsum-based self-leveling mortar that can be effectively applied in practical …
Research on the method of improving the influence of chloride ion on the performance of desulfurized gypsum products [J]. New building materials. 2014, 11: 41-45.
At present, industrial solid wastes in the world are characterized by high output, many kinds, large differences in physical and chemical properties, and uneven regional distribution [1], [2], [3].Typical industrial solid wastes are classified as: alkaline solid wastes (RM, carbide slag and alkaline slag, etc.), sulfate solid wastes (industrial by-product gypsum and …
Desulfurization gypsum (DG) is an industrial solid waste obtained by using lime to recover SO 2 gas in flue gas. Its chemical reaction process is shown in equation (1).Due to the limited effective treatment methods, a large amount of DG dumped has an unavoidable negative impact on environment [13].The main chemical composition of DG is CaSO 4 ·2H 2 O, which …
Flue gas desulfurization gypsum (FGDG) is an industrial by-product generated during the flue gas desulfurization process in coal-fired power plants. ... growth and yield using desulfurized gypsum in the west of Songnen Plain, northeast China Geoderma, 187–188 ... Pan Z, Du Z, Cheng H, Cheng F Effect of impure components in flue gas ...
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, …
In order to realize the reutilization of industrial waste red mud and desulfurized gypsum whiskers, a novel ceramsite was fabricated using red mud and desulfurized gypsum whiskers for the adsorption of Pb(II). The study investigated the impact of red mud / desulfurized gypsum whiskers mass ratio, coupling agent dosages and calcination temperature on the …
Desulfurized gypsum had a significant effect on the soil's available potassium content but no significant effect on the organic matter and total nitrogen contents and the available phosphorus.
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 treated with wet limestone and forced oxidization to form calcium sulfate (CaSO 4 ·2H 2 O) (Laperche and Bigham, 2002).Synthetic …
gypsum generation has not been accompanied with a similar increase in its utilization, with utilization rates decreasing from 79% in 2006 to 57% in 2016 [1]. With the rapid development ... of desulfurized gypsum conforms to the concept of green and low-carbon development. Therefore, full research on the comprehensive performance of desulfurized ...
The generation of S 2− from FGD gypsum, with the aid of sulfur-reducing bacteria and organic matter under anaerobic conditions, of which equations is as follows: (1) The generated ... (American Coal Ash Association), 1 chloride content in the desulfurized gypsum should be reduced to below 400 ppm.
