آخرین محصولات
Effect of Portland Cement on the Selected Properties of Flue …
The introduction of the European Union's climate change legislation and the intended use of renewable energy sources instead of fossil fuels will significantly reduce the production of flue gas desulfurization (FGD) gypsum used as the raw material for gypsum mortar plasters' production. This has forced mortar producers to look for …
Promotion of conversion activity of flue gas …
Abstract: The massive accumulation of flue gas desulfurization (FGD) gypsum produced in the wet limestone-gypsum flue gas desulfurization process not only encroaches on lands but also causes serious environmental pollution. The preparation of α-hemihydrate gypsum (α-HH) is an important way to achieve high-value utilization of FGD gypsum. ...
Sustainability | Free Full-Text | Preparation of Gypsum–Urea …
Gypsum–urea is a kind of urea product with substantially reduced aqueous solubility and lower hygroscopicity that increases the soil retention time of urea and thus enhance its environmental sustainability. Here, gypsum–urea was prepared using bulk industrial solid waste flue gas desulfurization (FGD) gypsum as a raw material in a …
Experimental Studies on Decomposing Properties of Desulfurization …
Flue gas desulfurization (FGD) gypsum is an industrial by-product of the desulfurization process. The gross product of FGD gypsum has reached 550 million tons in China by 2016 and quite a portion ...
Desulfurization gypsum uses and properties
What is desulfurization gypsum. Desulfurization gypsum, also known as FGD gypsum (flue gas desulfurization gypsum), is an industrial by-product gypsum obtained by desulfurization and purification of flue gas generated after combustion of sulfur-containing fuel (coal, oil, etc.), and its composition is calcium sulfate dihydrate …
Emission reduction process for dechlorinating …
The elemental content of FGD gypsum before and after desulfurization by a saturated steam spray is shown in Figure 7. Given that FGD gypsum is largely influenced by high temperatures and …
Effect of different soluble salt ions on deformation of desulfurization …
According to statistics, the annual output of desulfurization gypsum in 2014 was about 75.5 million tons. China's 13th five-year plan puts forward that it is necessary to speed up the recycling of waste resources (Hao et al 2016, Ding et al 2021, Ding et al 2023a, 2023b). Thereforethe desulfurization gypsum has excellent utilization prospects.
Materials | Free Full-Text | Effect of Flue Gas Desulfurization Gypsum
This work aims to investigate the effect of additional flue gas desulfurization gypsum (FGDG) on the properties of calcium sulfoaluminate cement (CSAC) blended with ground granulated blast furnace slag (GGBFS). The hydration rate, setting time, mechanical strength, pore structure and hydration products of the CSAC-GGBFS …
Desulfurization gypsum carbonation for CO2 sequestration …
Based on salt effect and the solubility equilibrium theory of insoluble electrolyte, the technological process of ammonia-enhanced desulfurization gypsum carbonation for CO 2 sequestration in NH 4 Cl-H 2 O system was studied, and calcium carbonate with different crystal phase and morphology was prepared in this paper. The …
Short-term responses of soils and crops to gypsum …
Short-term responses of soils and crops to gypsum application on organic farms Louceline Fleuridor1 Catherine Herms1 Steven Culman2 Warren A. Dick2 ... of flue gas desulfurization and mined gypsum sources, with data collected over 2 to 3 yr from 10 sites in several states. Here we followed a similar statistical approach. The specific
Materials | Free Full-Text | Performance Characterization and
Fly ash–slag-based alkali-activated materials have excellent mechanical performance and a low carbon footprint, and they have emerged as a promising alternative to Portland cement. Therefore, replacing traditional Portland cement with slag–desulfurization gypsum-based alkali-activated materials will help to make better …
Why using Desulfurized Gypsum Briquette Making …
GEMCO briquette making machine can make briquettes of 20-80mm in diameter, briquetting rate is as high as 85%, and compressive strength is 30N. The chemical components of desulfurized gypsum briquettes are …
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, …
Summary of research progress on industrial flue gas desulfurization
1. Introduction. In the industrial production of China, the processing of phosphate rock, volcanic eruptions, kerosene combustion and aluminum smelting will lead to flue gas emissions containing a large amount of SO 2.SO 2 is a highly irritating gas. Because SO 2 is freely soluble in water and enters the respiratory tract, it can generate …
Utilization of Desulfurization Gypsum to Producing SO
The desulfurization gypsum are widely utilized in cement retarder, building material, embedment and neutralizer or regulator of soil in agriculture [3, 4]. At same …
Utilization of Desulfurization Gypsum to Producing SO
However, desulfurization gypsum has some own features as relatively finer solid size (60 μm), high water content (10–15%) and impurity, these have special effect on the utilization. The desulfurization gypsum are widely utilized in cement retarder, building material, embedment and neutralizer or regulator of soil in agriculture [3, 4].
Mapping the knowledge domain of microbial desulfurization …
Direct application of high-sulfur fuels and ores can cause environmental pollution (such as air pollution and acid rain) and, in serious cases, endanger human health and contribute to property damage. In the background of preserving the environment, microbial desulfurization technologies for high-sulfur fuels and ores are rapidly …
REFERENCES
Flue gas desulfurization gypsum (FGDG), a solid waste material generated by power plants, offers a cost-effective solution for preparing backfill materials. Con
Utilizations of preheated flue gas desulfurization gypsum …
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 …
Preparation of high-performance building gypsum by calcining FGD gypsum
1. Introduction. Flue gas desulfurization (FGD) gypsum is an inevitable industrial solid waste originated from the process of calcium-based wet flue gas desulfurization in thermal power plants and some chemical plants in order to reduce the emission of SO 2 pollution gas [1], [2].In China, the total product of FGD gypsum has …
Strength and Microscopic Mechanism of …
Mica schist weathered soil possesses a number of poor engineering characteristics, which make it difficult to use as a subgrade material for resource utilization. Therefore, in this study, a new type of …
desulfurization gypsum briquette machine,coal briquette …
Zhongzhou desulfurization gypsum briquette machine will directly press desulfurization gypsum powder into 20-80mm round briquettes and without any adhesive. zzbriquettemachine@dzzzg 0086-371-64597766
Gypsum Briquetting | Gypsum Briquetting Machine-ZYmining
The gypsum briquetting machine is mainly used for pressing desulfurized gypsum powder, and is used as a cement raw material after being pressed into a ball block.
Synthesis of α-CaSO4·0.5H2O from flue gas …
Synthesis of a-CaSO4$0.5H2O from flue gas desulfurization gypsum regulated by C4H4O4Na2$6H2O and NaCl in glycerol-water solution Qing-Jun Guan, Wei Sun, * Yue-Hua Hu, Zhi-Gang Yin and Chang-Ping Guan A brand new method to transform flue gas desulfurization gypsum (FGD gypsum) into a-calcium sulfate
Enhanced adsorption capacity for phosphate in …
In this study, a flue gas desulfurization (FGD) gypsum was calcined as phosphate sorbent materials for the remediation of phosphate wastewater. RESULTS. In addition to the main crystalline phase of gypsum, FGD gypsum contains a small quantity of quartz, dolomite, calcite and magnesite. Moreover, FGD gypsum has a prismatic structure with a dense ...
Preparation of α-High-Strength Hemihydrate from Flue …
Preparation of α‑High-Strength Hemihydrate from Flue Gas Desulfurization Gypsum in AlCl 3−MgCl 2 Solution at Atmospheric Pressure Shuaifeng Liu, Edouard Asselin, and Zhibao Li* Cite This ...
Effect of Desulfurization Gypsum and Quicklime on …
In order to reduce the filling cost and improve the coefficient of utilization of fly ash in coal mine filling paste, the influence of desulfurization gypsum and quicklime on the setting time and uniaxial compressive strength (UCS) of filling paste with large quantity of fly ash were studied using the control variable method, mechanical analysis, and other means. …
Preparation of α-High-Strength Hemihydrate from Flue Gas
PDF | On Sep 10, 2022, Shuaifeng Liu and others published Preparation of α-High-Strength Hemihydrate from Flue Gas Desulfurization Gypsum in AlCl 3 –MgCl 2 Solution at Atmospheric Pressure ...
Flue Gas Desulfurization: Detailed Process Overview
This blog post is the third in a three-part series that discusses flue gas desulfurization (FGD). The first post provides overviews of sulfur dioxide (SO 2) and emissions regulations, the FGD industry, and global FGD market trends.The second post provides high-level overviews of wet, semi-dry, and dry FGD technologies with respect …
Desulfurization Gypsum Briquette Machine
Zhongzhou desulfurization gypsum briquette machine will directly press desulfurization gypsum powder into 20-80mm round briquettes and without any adhesive.
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