The main component of desulfurized steel slag is calcium sulfate, which is similar to desulfurized gypsum. ... it could be expected that DS could be used as the amendment of saline-sodic soil. As a soil amendment, the use of desulfurized gypsum has been widely studied (Chen et al., 2001; Clark et al., 2001; Cui et al., 2021; …
To address this problem, the commonly used method is to add a certain amount of water reducer to the gypsum. ... Phosphogypsum PCE polycarboxylate superplasticizer and desulfurized gypsum . ... Domestic and foreign studies have shown that the resource utilization of phosphogypsum building materials is the main way to …
Abstract. Firstly the basic characteristics of Flue-gas-desulfurization gypsum (FGD gypsum) is described in this paper. Then the research status of FGD gypsum is …
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 is to enhance comprehensive properties of GSL and prepare qualified desulfurized building gypsum-based self-leveling mortar that can be …
In this case, first step of making good gypsum mortars is to choose suitable gypsum. Additives too play a important role. Retarder as a needful materials for gypsum mortars, its quality and dosage ...
The by-product of wet flue gas desulfurization, desulfurized steel slag (DS), had chemical characteristics like natural gypsum that can be used to improve saline-sodic soil.
Desulfurized gypsum, a by-product of thermal power plants for removal of sulfur from coal, may be used as an external source of Ca2 + for reclamation of saline-sodic soil in this plain because it ...
Flue gas desulfurization gypsum (FGDG) is a byproduct of sulfur (S) removal from fuel combustion gases in coal-based power generation plants (Wang & …
The utilization of solid wastes (SWs) as a potential resource for backfilling is not only conducive to environmental protection but also reduces the surface storage of waste. Two types of SWs, including fly …
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.
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 (CaSO 4.2H 2 O).. …
In order to explore the influence of the types of waste gypsum on the properties of alkali slag cement, fluorogypsum (FG) and flue-gas desulfurization (FGD) gypsum were comparatively investigated. Moreover, the action mechanisms of FG and FGD gypsum on the properties of alkali slag cement were analyzed. The results …
mortar. Desulfurized gypsum is an industrial by-product gypsum obtained after flue gas desulfurization in coal-fired or oil-fired power plants [1]. Its main components and physical and chemical properties are basically the same as natural gypsum, with higher purity and smaller particle size. Since desulfurized gypsum contains water
Last updated on March 11, 2024. EPA evaluated the use of FGD gypsum in agriculture to demonstrate how the BU Methodology can be applied for unencapsulated beneficial …
environmental pollution [4]. 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 …
in the form of commercial-grade gypsum that could be used for wallboard manufacturing. When salable gyp-sum is not attainable, dry FGD waste is piled (gypsum stacking) or landfilled. The operation of the LSFO pro-cess can be improved when organic acids, such as di-basic acid, are added to the limestone slurry. The use of
The influences of desulfurization gypsum on the properties of both Magnesium oxychloride cement (MOC) pastes and MOC abrasive tools were investigated in this study.
Untreated FGD gypsum is mainly composed of calcium sulfate and can be recycled in main industrial fields . The direct heaping of FGD in the natural environment also results in land occupancy and environmental pollution . At present, the industrial utilization of desulfurized gypsum has become one of the main research directions of …
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] .
FGDG: flue gas desulfurization gypsum. Numbers denote response ratios which are converted to percentage changes (%) and are marked with stars (*) to indicate whether the responses are statistically significant. Lines and arrows denote the main impacts of FGDG application on soil properties, crop yields, plant seedling emergence, …
See Table 1 for composition of main elements of desulfurized gypsum and cement clinker. ESMA 2020 IOP Conf. Series: Earth and Environmental Science714 (2021) 032048 IOP Publishing ... so it is feasible to use desulfurized gypsum as cement retarder. At the same time, it can also be seen that the setting time of Portland cement ...
1. Introduction. Recently, a lot of research interest has been devoted to human health and environment issues, especially the air pollution [1, 2].Generally, the particulate matters with smaller size always stay in the atmosphere for a long time, easy to carry a large number of poisonous and harmful substances [3, 4].According to earlier …
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 SO2 emissions. Therefore, the Chinese …
In response to the basic policy of green and low-carbon circular development to solve resource, environmental and ecological problems, gypsum is considered to be a filling material for mine backfilling. To explore the potential risks of gypsum to the groundwater environment due to the backfilling of abandoned mines, a sequential batch …
gypsum was divided into deta il, and its comprehensive utili-zation status was analyzed.14) Secondly, some progress has been made in the research of desulfurized gypsum as a waterproofing agent, and a new type of building gypsum-based waterproofing agent has been prepared.15) In addi-tion, a new type of high-efficiency inorganic composite
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 …
The main reason was that the adsorption desulfurization process mainly occurred with the replacement of oxygen-sulfur. ... Desulfurized gypsum is incorporated into the slag or mixed with a grinding blast furnace slag ... These two problems are interrelated and influenced by the rate of oxidation from S(IV) to S(VI) [153].
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].
the limestone gypsum flue gas desulfurization process, 2.7 ton of desulfurized gypsum can be generated for each 1 ton of SO2 removed [3]. A 300 MW coal-fired thermal power unit discharges about 30,000 ton of desulfurized gypsum every year (assuming 1.0% sulfur in coal) [4]. A substantial amount of desulfurized gypsum …
1. Introduction. Flue gas desulfurization gypsum (FGDG) is an industrial byproduct produced by limestone-gypsum wet desulfurization to treat SO 2 produced by thermal power plants and coal-fired plants, whose main component is CaSO 4 ·2H 2 O. In wet desulfurization, 1 t of SO 2 produces about 2.7 t of FGDG [1], [2].Some 130 million …
The use of FGD gypsum as a soil amendment is well known and has been investigated ..., 1 chloride content in the desulfurized gypsum should be reduced to ... sizes of the wastewater evaporation products with high concentrations of Ca 2+ and Na + ions are smaller than those of FGD gypsum. The main component is similar to that of …
DOI: 10.1016/j.envpol.2021.117799 Corpus ID: 236531280; Production and resource utilization of flue gas desulfurized gypsum in China - A review. @article{Liu2021ProductionAR, title={Production and resource utilization of flue gas desulfurized gypsum in China - A review.}, author={Sen Liu and Wei Liu and Fen Jiao …
1 Citations. Abstract. With emission control becomes more and more stringent, flue gas desulphurization (FGD) is commonly employed for desulfurization. …
46 Journal of the Korean Ceramic Society - Sung Kwan Seo et al. Vol. 55, No. 1 with the mixing water, but started to be decrease after 6 h. This means that the carbonization of Ca(OH)2 was greater ...
This research aims to study the utilization of waste from power plants, construction and demolition, and agriculture by varying the ratios of flue-gas desulfurization (FGD) gypsum, construction and demolition waste (CDW), and oil palm trunks (OPT) in concrete production. This research used these as the raw materials for the production of …
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 ...
1. Introduction. 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 …
5. FGD gypsum can be partially substituted for cement to produce high-strength building materials, reducing the carbon footprint and building materials cost, thus contributing towards the circular economy. 6.The low bulk density of FGD gypsum enables its use in lightweight building materials with a higher degree of insulation for wall …
