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 …
Preparation, characterization and application of red mud, fly ash and desulfurized gypsum based eco-friendly road base materials. Author links open overlay panel Yong Li b, Xiaoming Liu a b, Zepeng Li b, Yongyu Ren b, Yaguang Wang b, Wei Zhang b. …
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 recent progress in carbonation of flue gas …
Flue gas desulfurization gypsum (FGDG) is a type of industrial auxiliary gypsum obtained by desulfurization and purification of flue gas generated after the combustion of sulfur-containing …
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, …
[21] Tobert HA and Watt DB 2014 Impact of flue gas desulfurization gypsum application on water quality in a coastal plain soil J Environ Qual 43 273-280. Google Scholar [22] Tong ZJ, Li QS and Zhou YS 2009 Effects of desulfurized gypsum on heavy metal desorption and speciations in tidal flat reclaimed soil Eco and Environ Sci 18 2172-2176 in ...
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, …
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.
An innovative approach suggests using titanium slag and flue gas desulfurized gypsum as substitutes for Portland cement for soil solidification. This study systematically evaluates the effects of titanium slag-flue gas desulfurized gypsum-Portland cement composite (TS-FGD-OPC composite) solidifier on the performance of solidified soils.
The desulfurized gypsum can perform oxidation-reduction reaction with aluminum magnesium powder and the like at high temperature, and meanwhile, the desulfurized gypsum is strongly decomposed to generate sulfides and aluminum oxide, and a large amount of heat is emitted. The heat melts the excess metal or alloy and enters the weld of the base ...
The energy generation process (pyrolysis, hydrotreating, transesterification, and H 2 production) ... (2022) reported a deep insight into the composite cementitious materials of RM in synergy with steel slag, and desulfurized gypsum. It was found that more C–S–H gel and AFtwere formed after 3 days of curing, which could be attributed to 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 ...
Storage of low-grade diatomite can lead to environmental pollution. This study prepares a low-grade diatomite-based cementitious material (LGDCM) and assesses the influence of CaO/SiO 2 molar ratio on LGDCM strength within a low-grade diatomite–lime–desulfurized gypsum system. The carbon emissions from LGDCM were …
The thermal power generation industry uses a lot of energy and emits a large amount of greenhouse gases. On the other hand, a desulfurization facility can be installed to remove sulfur content during boiler combustion process of the power plant. ... Dry desulfurized gypsum generated from dry desulfurization facilities is suitable as a CO 2 ...
CaSO 4.·2H 2 O, the main component of desulfurized gypsum, is slightly soluble in water, and its dissolution equilibrium equation is shown in Equation (iii). Free Mg 2+ in pore solution tended to combine with SO 4 2- to form stable magnesium sulfate (MgSO 4 ), which reduces the concentration of Mg 2+, moves Equation (ii) to the right, and ...
However, this increase in FGD 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 . With the rapid development of industries, ... the industrial utilization of desulfurized gypsum has become one of the main research directions of scholars ...
The experiment carried out in 2022 and 2023, using a completely randomized block design, Based on the physical and chemical properties of the soil, the following five soil-improvement treatments were designed: 1) no fertilizer (CK); 2) desulfurized gypsum (T, 2.5 t ha −1); 3) 2.5 t ha −1 desulfurized gypsum and 1.5 t ha −1 green manure (green manure is …
A case analysis and treatment measures of high moisture content in wet desulphurization gypsum, Yun Liu, Siyang Liu, Caili Duan
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To effectively solve the problem of reutilizing semi-dry sintering flue gas desulfurized ash (SSFGDA) from steel plants, a new technology is proposed in this paper in which ash is added to a boiling furnace to obtain SO 2 during sulfuric acid production. Using thermodynamics and simulation calculations, the high-temperature characteristics of CaSO 3 …
The "Desulfurized Gypsum Market" reached a valuation of USD xx.x Billion in 2023, with projections to achieve USD xx.x Billion by 2031, demonstrating a compound annual growth rate (CAGR) of xx.x ...
Performance Analysis and Improvement of Gypsum Board Prepared from Desulfurized Gypsum with High Chloride Ion Content, Dongjie Yin, Fade Wu, Ying Wang, Pengqi Wang, Danjun Tan, Ming Jian, Liang He
The result of the thermal analysis showed that the weight of the carbonized dry desulfurized gypsum was decreased at about 700 o C by a de-carbonization reaction.
The addition of DG can promote the generation of AFt. Fig. 4 shows the mineral compositions of the three solid precursors by XRD. It can be seen that the major peak of GGBS was from ... fly ash and desulfurized gypsum based eco-friendly road base materials. Clean. Prod., 284 (2021), Article 124777, 10.1016/j.jclepro.2020.124777. View PDF View ...
The mix proportions for cement mortar samples with different content of ISSA (0, 10 wt%, 20 wt%, and 30 wt% replacement of clinker by weight) are listed in Table 2.Among all the samples, the amount of desulfurized gypsum was 4 wt% of the binder weight, the binder-to-sand ratio was 1:3, and the water-to-cement ratio was 0.5.
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 …
Flue gas desulfurization gypsum (FGD Gypsum) is an industrial byproduct derived from the desulfurization of flue gas produced by the combustion of sulfur-containing fuels (mainly coal) …
The S95 granulated blast furnace slag (GBFS) used in the experiment was purchased from Hengyuan New Materials Company, with a specific surface area of 550 m 2 /kg and a main particle size of 5–40um. Liquid sodium silicate was purchased from Hengyuan New Materials Company, with SiO 2 and Na 2 O contents of 30 % and 13.5 %, respectively. The …
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 …
[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] …
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, …
Across the different straw rates, greater yields were obtained with the FGD gypsum treatments compared with the corresponding non-gypsum treatments, and this effect can be explained by the fact that the application of FGD gypsum provides available Ca, S and other nutrients (i.e., Mg, K, Zn, Cu, and B) to plants and improves the soil physical ...
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 …
SO 4 2-and Ca 2+ are the main components of the desulfurized product gypsum, while Mg 2+ is the most common impurity in limestone. The appearance of Cl - in CPM can be considered as HCl originally absorbed by the desulfurization solution, and the desulfurization solution ran in acidity conditions and some desulfurization solutions evaporate ...
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 …
Desulfurization gypsum, also known as smoke desulfurization gypsum, sulfur gypsum or FGD gypsum, the main component is the same as natural gypsum, calcium sulfate dihydrate CaSO4·2H2O, content ≥ 93%. Desulphurized gypsum is a by-product of the FGD process, a technology that uses lime-limestone to recover sulfur dioxide from flue gases from ...
In this paper, by analysing the gypsum crystal morphology, particle size distribution, hydration heat, dimensional change rate, and morphology change of hydration …
Recycling industrial solid waste for mine backfill is one of the best ways to achieve green production in multiple industries. In this paper, the desulfurization gypsum (DG) as an activator is combined with the modified magnesium slag-fly ash cementitious paste backfill (MFPB) technology for the co-disposal of solid waste and goaf treatment, and the influence of …
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 ...
