Preparation, characterization and application of red mud, fly …
DOI: 10.1016/j.jclepro.2020.124777 Corpus ID: 226335113; Preparation, characterization and application of red mud, fly ash and desulfurized gypsum based eco-friendly road base materials
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Silage and flue gas desulfurized gypsum as additives …
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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Comparative Analysis of Hydration Expansion Performance of Desulfurized …
[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. M., …
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Performance Analysis and Improvement of Gypsum Board …
Chloride ion has an important influence on the performance of gypsum board prepared by desulfurization gypsum, especially in wet environment. Therefore, this paper analyzed the influence of chloride ion on the bonding propertiesof gypsum board and studied the ways to improve the bonding properties of gypsum board prepared by desulfurization gypsum with …
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Influence of Calcined Flue Gas Desulfurization Gypsum and …
At present, the industrial utilization of desulfurized gypsum has become one of the main research directions of scholars. Comprehensive utilization of desulfurized gypsum conforms to the concept of green and low-carbon development. Therefore, full research on the comprehensive performance of desulfurized gypsum in different systems will greatly ...
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Synergistic effect of red mud, desulfurized gypsum and fly …
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 …
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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 ...
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Desulfurization gypsum uses and properties
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 …
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Application Amount of Desulfurized Gypsum from Coal …
In order to protect national grain safety and ecological safety and develop a sustainable economy,it is important to improve alkaline land with desulfurized gypsum from coal fired power plants.Representative lightly alkalized soil,medium-alkalized soil and seriously alkalized soil in Xidatan of Ningxia Province were selected in the research and used in pot and soil column …
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Properties and microstructure of soil solidified by titanium …
The Portland cement-fly ash-desulfurized gypsum composite solidifier brings the dredged soil to have higher strength and good resistance to dry-wet cycles [24]. Titanium slag is the residue after the titanium extraction from high titanium-type blast furnace slag. Currently, there are 80 million tons of titanium slag in China, with an annual ...
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(PDF) The Key Application Technology of Desulfurized Gypsum …
The results show that adding desulfurized gypsum, which accounts for 6% to 8% of the total mass of the cementitious material, has no adverse effect on the workability and can significantly improve ...
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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 ...
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Flue Gas Desulfurization Gypsum
The semi-hydrate content of desulfurized gypsum is adjusted as a natural plaster substitute for producing gypsum board, wallboard [107].The modified treatment of desulfurized gypsum with cement, inorganic waste, straw fiber and other wastes can be used to manufacture high-insulation and compression-resistant wall materials [108].Desulfurized gypsum is incorporated into the …
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desulfurized gypsum, also known as FGD gypsum
The lime slurry reacts with SO2 to generate calcium sulfate and calcium sulfite, and calcium sulfite is converted into calcium sulfate by oxidation to obtain industrial by-product gypsum, called …
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Desulfurized Gypsum
Industrial Mining Rotary Dryer for Limestone, Clay, Sand, Titanium Gypsum, Phosphogypsum, Fluorgypsum, Desulfurized Gypsum, Rotary Dryer Machine with Low Price US$ 15000-58000 / Set. 1 Set (MOQ) Zhengzhou Dongding Machinery …
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Utilization of low-quality desulfurized ash from semi-dry …
In the gypsum-metakaolin-cement system, although the dried FGD gypsum slightly reduced the workability of the mortar, the interval between the initial setting and the final setting was shortened ...
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Utilization of low-quality desulfurized ash from semi-dry …
This work aimed to investigate the feasibility of utilizing the low-quality desulfurization ash from semi-dry flue gas desulfurization by mixing with α-hemihydrate gypsum, and then the environmental issues resulted from low-quality desulfurized ash from semi-dry flue gas desulfurization can be resolved, and both economic and ecological benefits are brought to …
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Production and resource utilization of flue gas desulfurized …
Flue gas desulfurized gypsum mainly comes from thermal power plants, smelters, and large-enterprise boilers, and contains industrial by-products produced through a wet …
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Comparative Analysis of Hydration Expansion Performance of Desulfurized …
Gypsum has micro-expansion characteristic during the process of hydration and solidification, and there are certain differences in the hydration expansion characteristics of different types of ...
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Application of flue gas desulfurization gypsum improves multiple
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 ...
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The mechanism of preparation calcium ferrite from …
The mass of the sintered desulfurized gypsum was 3.07 kg/t, and the sulfur load was 0.570 kg/t. Therefore, successful recycling of sintered desulfurization gypsum requires the use of only 0.345 kg/t of gypsum at a time and the remaining gypsum is discharged, resulting in a 98.9% gypsum desulfurization rate and a 99.3% utilization rate. ...
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A comprehensive review of flue gas desulphurized gypsum: …
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 …
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A comprehensive review of flue gas desulphurized gypsum: …
Flue gas desulfurized (FGD) gypsum is an industrial byproduct of flue gas from the combustion of sulfur-containing coal and oil [1–3]. Show abstract. The controlled synthesis of α-hemihydrate (α-HH) gypsum using flue gas desulfurized gypsum is essential for the utilization of calcium and sulfur resources. An aspect ratio (AR) close to 1 is ...
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Effect of desulfurized gypsum whiskers on the adsorption
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 …
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Flue Gas Desulfurization Gypsum as Soil Amendment
FGD gypsum is created by forced oxidation scrubbers in coal-fired power plants which remove SO 2 emission from the flue gas stream. There are three different scrubbing processes: wet, semi …
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Recent advances in flue gas desulfurization gypsum …
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, …
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Recent advances in flue gas desulfurization gypsum …
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 physical …
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Performance Analysis and Improvement of Gypsum …
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 ...
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Flue gases: Gypsum dewatering in desulphurisation
This is where the raw flue gas is cleaned in an absorption wash tower where the sulphur dioxide reacts with an aqueous slurry of limestone to form gypsum. Roland Küspert and Gernot Krammer of Andritz describe the …
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Evaluation of FGD Gypsum as a Soil Amendment
Use of a wet scrubber results in the byproduct flue gas desulfurized (FGD) gypsum. Currently, FGD gypsum represents one of the largest non-mined supplies in the US. The US-EPA estimated that 12 million tons were produced in 2006, with about 9 million tons beneficially reused. It is estimated that 80% of the reused material was for the ...
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