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Performance Analysis and Improvement of Gypsum Board …

from Desulfurized Gypsum with High Chloride Ion Content To cite this article: Dongjie Yin et al 2020 IOP Conf. Ser.: Mater. Sci. Eng. 740 012048 ... desulfurized gypsum powder was added,

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The fineness of desulfurisation gypsum affects the performance of

Its fineness generally ranges from 40 to 60 um. (The fineness is greater than 160 is 0.7%, the fineness between 160 and 180 mesh is 4.23%, the fineness between 180 and 200 …

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Utilization of low-quality desulfurized ash from semi-dry flue gas

The removal of high concentration flue gas sulfur dioxide (SO2) using manganese carbonate ore desulfurization (MCO-FGD) is a promising route that combines economic benefits and pollution control.

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Recent advances in flue gas desulfurization gypsum processes …

Flue gas desulfurization gypsum (FGDG) is an industrial by-product generated during the flue gas desulfurization process in coal-fired power plants. ... this combination could be harmful because acrylamides have been deemed as neurotoxins (Lapin et al., 1982, Prasad and Muralidhara, ... growth and yield using desulfurized gypsum in the west of ...

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Application of Flue Gas Desulfurization Gypsum and …

The 11 major electricity-generating coal combustion stations in the northern Great Plains have the potential to produce almost 1 million Mg of flue gas desulfurization gypsum (FGDG) annually, which is a very attractive …

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Properties and microstructure of soil solidified by titanium slag …

A titanium slag powder (TS) was used, which was obtained from Pangang Group Co., Ltd. A flue gas desulfurized gypsum (FGD) was also used, which was obtained from Baogang Building Materials Co., Ltd. The main mineral phases of TS are amorphous with some titanium carbide (TiC) and the mineral phase of FGD is mainly hemihydrate gypsum (‎‎ Fig. 1).

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Desulfurization gypsum uses and properties

Desulfurized gypsum has high water content and high fluidity, only suitable for belt transportation. Desulfurization gypsum and natural gypsum are different in dehydration, grindability and mechanical properties of calcined gypsum …

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The fineness of desulfurisation gypsum affects the performance of

The fineness of desulfurized construction gypsum is fine, the specific surface area is large, the particle size range is narrow, the water consumption of the standard consistency is high, the thixotropy and workability are poor, the anti-sagging property and construction operability are also poor, and the surface finish of gypsum products is ...

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Utilization of low-quality desulfurized ash from semi-dry flue …

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

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Gypsum Dangers

Gardeners use gypsum as a natural additive to soil to enhance its workability and ability to retain moisture. Reducing the corrosiveness of the soil's alkalinity is also a favorable trait. Despite its many uses though, gypsum can …

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Solid waste-based dry-mix mortar using fly ash, carbide slag, and …

For example, Duan et al. [7] used FA, steel slag, and desulfurized gypsum to prepare cementitious composite materials; they found that the three ingredients had a synergistic effect. ... Self-cementitious property of steel slag powder blended with gypsum. Construct Build Mater, 113 (2016), 10.1016/j.conbuildmat.2016.03.102. Google Scholar

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The source and difference of desulfurization gypsum …

Desulfurization gypsum is a substance with calcium sulfate as the main component obtained by forced oxidation reaction after the countercurrent mass transfer of flue gas and desulfurizer slurry in the desulfurization reaction …

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Application of Flue Gas Desulfurization Gypsum and Its Impact …

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 …

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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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Performance regulation of desulfurized gypsum on solid waste …

Desulfurization gypsum (DG) is a solid waste byproduct from treating sulfur-containing flue gases in power plants. DG is subjected to long-term stockpiling due to its high sulfate content and the …

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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 Chinese government has …

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Research on optimizing performance of desulfurization-gypsum …

The obtained semi-aqueous desulfurized gypsum was the original desulfurized gypsum, which was placed in an oven at 180 °C and dehydrated for 2 h under synchronous heating with the box. ... Investigation into the synergistic effects in hydrated gelling systems containing fly ash, desulfurization gypsum and steel mineral powder. Constr. Build ...

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Effect of Mineral Admixtures on Physical, Mechanical, and

Li et al. added cement, fly ash, and lime to gypsum and observed that the compressive strength increased when the ratio of cement, fly ash, and lime was 10%, 20%, and 14.86%, respectively. Guo et al. determined that a 75% desulfurization gypsum, 5% cement, and 20% mineral powder ratio yielded FGDG blocks with good physical properties.

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Experimental study of permeability evolution in modified

The wet limestone-gypsum powder desulfurization technology is used in coal-fired power plants (Cui et al., 2021; ... This study focuses on the influence of groundwater seepage; however, to better realize the usage and effect of modified desulfurized gypsum in the design of spray layer support structure, the follow-up research will include ...

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Development and Application of Flue Gas Desulfurized Gypsum …

The main components of the blast furnace slag powder were CaO (43.19%), SiO 2 (25.52%), Al 2 O 3 (12.60%), and MgO (15.21%), as shown in Table 2. Due to the FGDG powder mainly comprising gypsum and the BFS powder being amorphous without crystalline phases, X-ray diffraction analysis (XRD) did not detect specific mineral phases in either material.

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Investigation on the compressive strength of desulfurization gypsum

The ultra-high addition of 20 % desulfurized gypsum is beneficial to improve the strength of DG-based binary cementitious materials with low energy consumption. ... "G90-D10" indicates that the cementitious material consists of 90 % blast furnace ore powder and 10 % desulphurization gypsum. ... in which the harmful heavy metals are adsorbed on ...

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Production and resource utilization of flue gas desulfurized …

A large amount of FGD gypsum is required to promote plant growth, although desulfurized flue gas with high boron and low levels of CaSO 3 is harmful to plant growth. …

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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. The objective of this study was to improve. comprehensive properties of GSL and prepare qualied desulfurized building gypsum-based self-leveling

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Open Access proceedings Journal of Physics: Conference …

500g hemihydrate gypsum and 3g modified corn starch, 340g water were weighed. Porous mineral materials and starch were added into the water, fully stirred, desulfurized gypsum powder was added, and the gypsum slurry was stirred to form gypsum slurry. Before the initial setting of gypsum slurry, it

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Summary of research progress on industrial flue gas desulfurization

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] .

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WO2018166220A1

A method for co-producing sulphoaluminate cement and sulfur by using desulfurized gypsum and aluminum ash, comprising: (1) drying aluminum ash, and heating desulfurized gypsum for dehydration to obtain semi-hydrated gypsum; (2) mixing the aluminum ash with the semi-hydrated gypsum according to a preset ratio, pulverizing, and homogenizing; (3) calcining the pulverized …

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Uses of desulfurized gypsum-Hanmero Desulfurization gypsum

Gypsum powder is one of the five major gel materials, occupies an important position in the national economy, widely used in construction, building materials, industrial molds and art models, chemical industry and agriculture, food processing and medicine beauty and many other applications, is an important industrial raw materials.

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Synergistic effect of red mud, desulfurized gypsum and fly ash in

To address these challenges, this paper aimed to prepare high-performance composite blast furnace slag powder (CBFS) by incorporating red mud (RM), fly ash (FA), desulfurization gypsum (DG) and BFS, guided by the synergistic effects and the theory of medium-calcium systems.

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Gypsum in Construction | Types, advantages, disadvantages, harm

The construction industry generally uses gypsum in powder form. When it is heated in its natural solid form, it loses its water molecules and becomes a powder. This is known as plaster in the construction industry. Applying different amounts of heat to the gypsum will give you different types of plaster. ... Can gypsum cause harm? Although ...

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Effect of Industrial Byproduct Gypsum on the Mechanical …

1. Introduction. BPG is an industrial solid waste primarily composed of calcium sulfate. Its main components include desulfurized gypsum (DG), phosphogypsum (PG), and titanium gypsum (TG), with smaller amounts of fluorogypsum, salt gypsum, and others [1,2,3].Figure 1 shows the distribution proportions of BPG sources in China. BPG contains various impurities and harmful …

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