effect of undigested limestone on desulfurized gypsum in Mexico
Effects of decomposed straw and desulfurized gypsum on …
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 …
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Properties and microstructure of soil solidified by titanium …
DOI: 10.1016/j.conbuildmat.2024.137061 Corpus ID: 270530557; Properties and microstructure of soil solidified by titanium slag-flue gas desulfurized gypsum-Portland cement composites as solidifiers
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Nonpolar Surface Modification Using Fatty Acids and Its …
4 2O, generally referred to as dihydrous gypsum), which includes moisture determination of two molecules within the structure [19]. For carbon dioxide fixation, this desulfurized gypsum is reacted with ammonia under a flow of carbon dioxide or with ammonium carbonate ((NH 4) 2CO 3) obtained from the reaction betw een carbon dioxide and …
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Gas Desulfurization Gypsum-Based Polymer Materials
the limestone gypsum flue gas desulfurization process, 2.7 ton of desulfurized gypsum can be generated for each 1 ton of SO2 removed [3]. A 300 MW coal-fired thermal power unit discharges about 30,000 ton of desulfurized gypsum every year (assuming 1.0% sulfur in coal) [4]. A substantial amount of desulfurized gypsum …
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High value-added utilization of desulfurized building gypsum …
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.
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Subsurface gravel blind ditch increasing improved effects of …
Besides, the desulfurized gypsum (22.5 t/hm2) and leaching amount (4500 m3/hm2) were applied. Then, the soil physical and chemical properties, soil salt ion concentration and yield of oil sunflower of different treatments were measured to determine the amelioration effect of gravel blind ditch.
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Effects of hybrid fibers on properties of desulfurized 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 ...
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Production and resource utilization of flue gas desulfurized gypsum …
The resulting product still met building requirements. Yang et al. [11] studied the effect of desulfurized gypsum on the properties of calcium sulfoaluminate cement. The results showed that FGDG ...
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Effect of Polyethylene-Grafted Maleic Anhydride on the …
Download Citation | Effect of Polyethylene-Grafted Maleic Anhydride on the Properties of Flue-Gas Desulfurized Gypsum/Epoxy Resin Composites | Waste resource utilization can save energy, reduce ...
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SVXPXVHGDVFHPHQW Limestone-gypsum Wet …
The results showed that when the content of desulfurized gypsum after 80 °C heat treatment was 4% of Portland cement, the initial setting time was 136min, and the …
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Investigation on Removal Characteristics of SO3 Acid Mist …
With the increasing attention on SO3 emission in coal-fired power plants, the removal of SO3 acid mist in a limestone-gypsum wet flue gas desulfurization (WFGD) system was investigated. The generation properties of SO3 acid mist were analyzed with an experimental system, and the effects of flue gas properties and technologies for ultralow …
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The effects of desulfurized gypsum on the mechanical …
Geopolymer is an emerging green cementitious material that can be used to stabilize dredged clay (DC) as construction materials. This paper presented an experimental study on the effects of desulfurized gypsum (DG) on the mechanical properties (e.g., stress-strain characteristics, unconfined compressive strength (UCS) and water stability) …
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Production and resource utilization of flue gas desulfurized 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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Investigation on Removal Characteristics of SO3 Acid Mist …
With the increasing attention on SO 3 emission in coal-fired power plants, the removal of SO 3 acid mist in a limestone-gypsum wet flue gas desulfurization (WFGD) …
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Effect of curing temperature on the reaction kinetics of …
Recently, the steel slag-fly ash-desulfurized gypsum (SS-FA-DG) composite system was developed as a novel building cementitious material, however, its reaction mechanism and reaction process mains unclear. ... Ettringite-based binder from ladle slag and gypsum–The effect of citric acid on fresh and hardened state …
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Effects of applying flue gas desulfurized gypsum on …
The impact of desulfurized gypsum on soil carbon sequestration was most pronounced within 0~7 days after application, with the greatest effect observed at an application rate of 40 t·hm-2. Furthermore, correlation analysis indicated that changes in soil carbon storage were significantly associated with soil pH, soil salinity ...
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Integrated Assessment of the Environmental and Economic Effects …
To solve the problems of difficult treatment of desulfurized gypsum and overmining of limestone, a kind of lime/gypsum flue gas desulfurization (FGD) collaborative desulfurized gypsum resource utilization process (LCS) was proposed. The system mainly includes the LCS-LFGD (lime/gypsum flue gas desulfurization system), …
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Experimental investigation of utilizing waste flue gas desulfurized …
The compaction effect and settlement were assessed through field tests. Abstract. 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 …
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REFERENCES
Research on water-resistant gypsum blocks made from flue gas desulfurized gypsum," Comprehensive utilization of fly ash ... Effect of desulphurization gypsum on the strength and microstructure of the sludge ash cementitious system," J. Zhengzhou Univ. (Eng. Sci.)
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Coatings | Free Full-Text | Effect of Polyethylene-Grafted …
Semidry desulfurization and wet desulfurization in a furnace are usually used in the circulating fluidized bed boiler in the power production of thermal power plants, and these two approaches lead to high calcium content in the fly ash and bottom slag of circulating fluidized beds and produce abundant flue-gas desulfurized (FGD) gypsum …
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A comprehensive review of flue gas desulphurized gypsum: …
i) Analyse the physical and chemical properties of FGD gypsum and compare them with traditional raw materials, such as natural gypsum and OPC. ii) …
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Recent advances in flue gas desulfurization gypsum …
However, the use of granular limestone made a neutralization column necessary to ensure the rubbing of the limestone particles in it. This kept the limestone …
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Recent advances in flue gas desulfurization gypsum …
1.1. Flue gas desulfurization processes. The flue gas desulfurization (FGD) processes can be separated into two main categories: once-through and regenerable processes, depending on how the sorbent is treated after SO 2 adsorption (Srivastava and Jozewicz, 2001).Once-through, or non-regenerable, processes utilize the sorbent as a …
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Recent advances in flue gas desulfurization gypsum …
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, …
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Preparation, characterization and application of red mud, fly …
Red mud (RM), fly ash (FA) and desulfurized gypsum (DG) are harmful solid wastes that need to be treated. In this study, RM, FA, DG were used as the main raw materials to prepare road base materials based on the different (CaO + Na 2 O)/(SiO 2 +Al 2 O 3) molar ratio, and its mechanical properties, durability, microstructure and …
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(PDF) Influence of Early Strength Agent on the Strength and …
The test results show that sodium sulfate has a poor improvement effect on the sample due to the presence of desulfurized building gypsum in the composite cementing system, while calcium chloride ...
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Effect of curing temperature on the reaction kinetics of …
In the first part, steel slag (SS), blast furnace slag (BFS), fly ash (FA), and desulfurized gypsum (DG) are separately ground and mixed properly to prepare a solid waste AUP, and the effect of ...
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Effects of Desulfurized Gypsum Addition on Saline-alkali …
The soil nutrient content of the ameliorated saline-alkali soils with different ages,and the diurnal courses curve of photosynthetic parameters,photosynthetic light response curve and yield of oil-sunflower(Helianthus annuus) grown on the ameliorated soils were measured to investigate the effects of desulfurated waste residue additions on the saline-alkali …
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Desulfurization gypsum uses and properties
The grindability of desulfurized gypsum is better than natural gypsum, and the desulfurized gypsum itself is a fine powdery material. When grinding, it has a grinding effect on clinker and other mixed materials, make the cement with much more fine particles and a significantly larger specific surface.
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FACTORS EFFECTING EFFICIENCY PREDICTION OF …
The effects of adding an organic acid or using a limestone with a fine particle size distribution (PSD) have been examined in a wet flue gas desulphurisation …
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