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The yield and quality of the FGD gypsum depend on parameters such as operating mode, type of fuel/sulfur content, and the type of absorbent desulfurizer …
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The RM was pretreated using our previous method [15], and the FA was not pretreated and the DG was dried at 105℃.After that, the RM, DG and FA were used to supplementary cementitious materials to replace cement in equal amounts, and the mortar test blocks of RM-cement, RM-FA-cement and RM-FA-DG-cement were prepared …
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Research should also focus on the utilization of FGD gypsum in the development of building materials like alpha gypsum, floor screeds, wall putty, etc. 6. There are very few reports available on the acoustic properties of FGD gypsum; however, it is a good sound-absorbing material based on its high porosity, which needs further detailed ...
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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. China is a large coal-consuming country and has always had serious SO 2 emissions. Therefore, the …
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Request PDF | On Nov 1, 2019, Haoxin Li and others published Utilization of low-quality desulfurized ash from semi-dry flue gas desulfurization by mixing with hemihydrate gypsum | Find, read and ...
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Hou K. Using flue gas desulfurization gypsum in power plant as cement retard replacing natural gypsum [J]. Cement. 2005;10:21–3. Google Scholar Li S, Wang J, Wang Q. The …
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The system diagram of reducing gypsum in the multi- stage and multi-atmosphere fluidized beds. Diagrammatize: 1 raw material; 2 pelleter; 3 adhesion material; 4 drying process; 5 circulating fluidized bed heater; 6 cyclone separator; 7 J type valve; 8 circulating fluidized bed reactor; 9 tubular air preheater; 10 dust collector; 11 draft fan; 12 chimney; 13 air; …
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Bosson Research's latest report provides a deep insight into the global Desulfurized Gypsum market covering all its essential aspects. This ranges from a macro overview of the market to micro details of the market size, competitive landscape, development trend, niche market, key market drivers and challenges, SWOT analysis, …
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The results of the orthogonal tests for the range and variance analysis indicated that the degrees of influence on the compressive strength at ages of 3, 7, and 28 d decreased in the following ...
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Application status of FGD gypsum at home and abroad . 3.1. Research status in China ... Research status at abroad . The research of FGD gypsum in …
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Taking desulfurized gypsum as an example, it is mainly used as a cement retarder, paper gypsum board, gypsum block, and other new wall materials. By 2019, the output will reach 71.5 Mt, and the utilization …
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Mercury release is also a problem in desulfurized gypsum that is used to produce building materials like gypsum. These problems highlight that if not enough emphasis is put on mercury control in coal ash and desulfurized gypsum, mercury emission control measures at coal-fired power plants will not be effective because the …
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Red mud, a by-product of alumina production, has a great impact on the environment due to its high alkalinity. In this paper, two-part geopolymer mortar was synthesized by combining red mud and ...
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Using desulfurized gypsum and steel slag as raw material make desulfurized gypsum-steel slag composite gelled material, by adding cement, triethanolamine, aluminium sulfate, compound activator ...
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In 2020, global FGD-gypsum production is expected to reach 255 million tons, with Asia accounting for 55%, followed by Europe (22%), North America (18%), …
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2.1. Raw materials. The desulfurized β-hemihydrate gypsum (density; 2.497 g/cm 3 and specific surface area; 330.14 kg/m 2) was obtained from Chongqing Yuju Environmental Protection Technology Co., LTD.The 42.5R Ordinary Portland Cement (similar to ASTM C150 Type I Cement) was obtained from Chongqing Fuhuang Cement Co., LTD …
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FGD gypsum in China and gypsum separated from waste gypsum board (WGB) in Japan were added to salt-affected soil as soil amendments. The effects of lignite and peat, which contains humic ...
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Current study proposes an effective way to modify the properties of super-sulfated cement (SSC) paste and mortar with preheated flue gas desulfurization (FDG) gypsum at different temperatures and durations, and different sulfate compositions. Preheated FGDs with temperatures between 25 and 150 °C and durations between 0 …
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The spray evaporation is a promising zero discharge technology for desulphurization wastewater treatment. In this work, a pilot-scale platform for the spray evaporation of desulfurization wastewater was built, the desulphurization wastewater was atomized by a rotary atomizer and evaporate in the evaporation tower, and the …
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Based on Bibliometric Analysis of Saline Alkali Soil Improvement Technology Research Status and Hot Spot Analysis. Nan Lu 1,2,3,4,5, Gang Li 1,2,3,4,5 and Yuhu Luo 1,2,3,4,5. Published under licence by IOP Publishing Ltd IOP Conference Series: Earth and Environmental Science, Volume 692, 2.
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CS desulfurization pH is not easy to control, easy to block the pipeline, gypsum moisture content is high, and dehydration is not easy. The pH of CS slurry is 12.45, and that of desulfurized gypsum is 3.33. The pH span is large and difficult to control, which will lead to the oxidation of CS desulfurized gypsum and the formation …
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*Corresponding author: 601515179@qq Research status of different improvement measures for saline-alkali land Jian Li 1, 2, 3, * 1 Key Laboratory of Degraded and Unused Land Consolidation Engineering, Ministry of Natural Resources, xi'an 710021, China. 2 Shaanxi Provincial Land Engineering Construction Group Co., Ltd., xi'an 710075, China. …
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DOI: 10.1016/j.envpol.2021.117799 Corpus ID: 236531280; Production and resource utilization of flue gas desulfurized gypsum in China - A review. …
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This paper presents an experimental study and micro-mechanism discussion on gypsum role in the mechanical improvements of cement-based stabilized clay (CBSC).
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It would be expected that more mercury would be present in coal ash and desulfurized gypsum from the increased combustion of coal and the abundance of Hg removal facilities in Chinese coal-fired power plants, highlighting the increased emphasis on the removal of mercury from atmospheric emissions of coal- Fired power plants in …
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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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DOI: 10.1016/j.conbuildmat.2023.131840 Corpus ID: 258997305; Effects of hybrid fibers on properties of desulfurized gypsum-based composite cementitious materials @article{Lv2023EffectsOH, title={Effects of hybrid fibers on properties of desulfurized gypsum-based composite cementitious materials}, author={Fangtao Lv …
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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 …
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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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1. Introduction. Flue gas desulfurized gypsum mainly comes from thermal power plants, smelters, and large-enterprise boilers, and contains industrial by-products …
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