(PDF) The Key Application Technology of Desulfurized Gypsum …
The results show that ad ding desulfurized gypsum, ... 1:1.2.The 28days final material strength was 2.0 MPa,which achives the technical specification requirements.Through the test of SEM, XRD and ...
Emission reduction process for dechlorinating …
The heat loss test results of the FGD gypsum inorganic chlorides are shown in Figure 3. For temperatures ranging from 30 to 90°C, none of the chlorides were decomposed in large amounts. ... According …
Experimental study on the desulfurized gypsum and steel …
With steel slag and desulfurized gypsum as main raw material,mixed appropriate amount slag and compound addition a little of activator,and based on orthogonal test,we explored the slag dosage,the proportion of the combined admixture activator and the desulfurized gypsum dosage impact on the performance of clinker-free cementing material,such as …
Improvement in Water Resistance of Desulfurized …
agents were added to the gypsum slurry, sequentially. The test piece was formed by triple trial molding cured for 7 days and dried to dryness. Fig. 4 shows the strength change of the saturated water gypsum test block after 24 h of water immersion, whereas Fig. 5 illustrates the strength change of the dry gypsum test block. The saturated water ...
Properties and microstructure of soil solidified by titanium …
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 ... To test the properties of solidified soil, the soil, …
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].
Optimization design and characterization of slag …
Since many independent factors can affect the property of geopolymer, it is of great significance to seek optimization technologies to maximize the recovery and utilization of solid waste resources. In this work, a cementitious material was prepared using ground granulated blast furnace slag (GGBS), carbide slag (CS) and desulfurized …
Recent advances in flue gas desulfurization gypsum …
The application of FGDG reduced the water-soluble phosphorus concentrations in soils with greater soil test (P = 0.0002) and lower cation exchange capacity (P = 0.0087). ... (Oriza sativa L.) growth and yield using desulfurized gypsum …
Characterization of flue gas desulphurized (FGD) gypsum of …
The leaching test of the HMs present in FGD gypsum samples was done following the US EPA SPLP standard to extract the acid-soluble fraction (USEPA, Method 1312, 1994) and European Standard ...
Production and resource utilization of flue gas desulfurized …
1. Introduction. Flue gas desulfurized gypsum mainly comes from thermal power plants, smelters, and large-enterprise boilers, and contains industrial by-products …
Application of flue gas desulfurization gypsum improves multiple
To test these effects, we divided soils to five groups (i.e., heavy sodic, strong sodic, moderate sodic, weak sodic, and saline soils) according to soil pH, ESP, and EC. ... Influence of adding structure krilium combined with desulfurized gypsum on takyric solonetz soil improvement and growth of Lycium chinense. North. Hortic, 21 (2018), pp ...
Open Access proceedings Journal of Physics: Conference …
addition of 1% porous mineral material to the desulfurized gypsum had little effect on the initial setting time and the final setting time of the desulfurized gypsum slurry.The test results of mechanical properties of 12 mm thick plain gypsum board prepared from porous mineral materials are shown in Table 4.
Utilization of flue gas desulfurization gypsum to produce …
Flue gas desulfurized gypsum (FGDG) is an industrial by-product discharged from thermal power plants, smelters, and large-scale enterprise boilers. ... The test specimen was heated continuously from 30 to 1000 °C at 10 °C/min in a nitrogen environment. 3. Results and discussion3.1. Unconfined compression strength.
Effect of Mineral Admixtures on Physical, Mechanical, and
The production of flue gas desulfurization gypsum poses a serious threat to the environment. Thus, utilizing gypsum-based self-leveling mortar (GSLM) stands out as a promising and effective approach to address the issue. β-hemihydrate gypsum, cement, polycarboxylate superplasticizer, hydroxypropyl methyl cellulose ether (HPMC), retarder, …
Preparation, characterization and application of red mud, …
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 …
Synergistic effect of red mud, desulfurized gypsum and fly …
Semantic Scholar extracted view of "Synergistic effect of red mud, desulfurized gypsum and fly ash in cementitious materials: Mechanical performances and microstructure" by Yaguang Wang et al. ... for Fourier-transform infrared spectrometry was found to be effective and hence can be used as a rapid and simple test for pozzolanic …
Effect of Polyethylene-Grafted Maleic Anhydride on the
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 …
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 provides a comprehensive review of flue gas desulphurized (FGD) gypsum production, property, and applications in the construction industry.
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 …
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. ... A mobility test mold with an inner diameter of 30 ± 0.1 mm and a height of 50 ± 0.1 mm was placed horizontally in the center of the test board. The slurry prepared …
Optimization design and characterization of slag …
Since many independent factors can affect the property of geopolymer, it is of great significance to seek optimization technologies to maximize the recovery and utilization of solid waste resources.In this work, a cementitious material was prepared using ground granulated blast furnace slag (GGBS), carbide slag (CS) and desulfurized …
The Effects of Combined Retarders on the Properties of …
Abstract. As a relatively fast-setting building material, desulfurized gypsum is difficult to use. Citric acid, sodium gluconate, and sodium tripolyphosphate were used to …
A comprehensive review of flue gas desulphurized gypsum: …
Analysis of FGD gypsum performed by various authors (Table 6) shows that FGD gypsum contains 36.9 – 54.4 % of SO 3, 28.1 – 46.7 % of CaO, and 0.01 – …
Effects of hybrid fibers on properties of desulfurized gypsum …
Basalt fiber (BF) and polyvinyl alcohol fiber (PVAF) were mixed into desulfurized gypsum-based composite cementitious material (DGCCM) by an orthogonal test to prepare hybrid fiber-reinforced DGCCM, whose mechanical properties, water resistance, and durability were studied using visual, range, variance, and microstructure …
Effects of hybrid fibers on properties of desulfurized gypsum …
The undisturbed desulfurization gypsum after screening was calcined at 180 °C for 2 h and sealed at room temperature for about 7 d to form semi-hydrated desulfurized gypsum. Fig. 1 shows the microscopic morphology and X-ray diffraction (XRD) diagram of desulfurization gypsum. The quicklime was taken from Yibin …
Application of Flue Gas Desulfurization Gypsum …
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 …
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 ...
Multi-objective optimization of properties on polymer fiber …
However, desulfurization gypsum was commonly used as a filler or partial reaction material, resulting in a low utilization rate. Therefore, admixtures were added to desulfurization gypsum to prepare desulfurized gypsum-based composites, improving the mechanical characteristics of desulfurization gypsum [8], [9] and increasing its …
Test results of mechanical properties of plasterboard
Download scientific diagram | Test results of mechanical properties of plasterboard from publication: Performance Analysis and Improvement of Gypsum Board Prepared from Desulfurized Gypsum with ...
Influence of Calcined Flue Gas Desulfurization Gypsum …
The above research shows that the application of desulfurized gypsum in concrete systems will help improve the overall performance of concrete, realize the industrial utilization of desulfurized gypsum, and turn desulfurized gypsum into treasure, which is in line with the green and low-carbon development concept. However, adding …