Flue gas desulfurized gypsum (FGDG) is a waste material produced in the power stations during the flue gas desulfurization process. In China, a small amount of FGDG is used as cement additives or ...
WhatsApp: +86 18221755073The occurrence of Hg(I) was widely evident in various solid matrices, including desulfurized gypsum, fly ash, phosphorus powder in used fluorescent lamp, PM2.5, soil, and plant, despite Hg(I ...
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WhatsApp: +86 18221755073In China, the wet limestone-gypsum process is the most widely adopted FGD method due to its high efficiency and low cost [1], [2]. A limestone slurry is used as the absorbent to remove SO 2 in the flue gas and produce gypsum. The desulfurized flue gas leaves the FGD saturated with water vapour and entrains a large number of droplets.
WhatsApp: +86 18221755073Desulfurized 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 ...
WhatsApp: +86 18221755073Flue 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 ...
WhatsApp: +86 18221755073A large number of coal-fired flue gas is the culprit that caused by air pollution and acid rain. Based on this reason, lime/limestone-gypsum wet flue gas desulfurization(FGD) process as the main desulfurization technology are used by most countries to control emissions of SO2,at the same time generating a huge amount of flue gas desulfurization gypsum...
WhatsApp: +86 18221755073Calcium sulfate whiskers (CSWs) were synthesized using purified flue-gas desulfurization (FGD) gypsum as raw materials using a hydrothermal method, where the filtrate was recycled back to the …
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WhatsApp: +86 18221755073The 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 ash (FA) and desulfurized gypsum (DG), were used to prepare cementitious backfilling materials for underground mined-out areas. …
WhatsApp: +86 18221755073Semidry 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 …
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WhatsApp: +86 18221755073The single-factor experiments are designed to quantitatively investigate the effects of silica fume, mineral powder, and fly ash on the mechanical and thermal insulation properties of desulfurization gypsum-based composites (DGCs). The effect mechanism is discussed from the microscopic morphology of the internal structure, and the …
WhatsApp: +86 18221755073With 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 …
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WhatsApp: +86 18221755073DOI: 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 …
WhatsApp: +86 18221755073In 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 …
WhatsApp: +86 18221755073Desulfurization gypsum calcination process. The industrial by-product desulfurized gypsum is fed into the steam tube bundle calcining kiln through box feeder, belt conveyor, vibrating feeder and other conveying equipment, and then calcined with 240 ℃ supersaturated steam; The calcined products are sent to the cooling bin for cooling …
WhatsApp: +86 18221755073Heavy metals in flue gas desulfurization (FGD) gypsum from coal-fired power plants are at risk of releaching during the processes of stockpiling and resource utilization. In this study, the effects of organosulfur chelators dithiocarbamate (DTC) and trisodium trithiocyanate-15 (TMT-15) on the solidification characteristics of heavy metals …
WhatsApp: +86 18221755073Current 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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WhatsApp: +86 18221755073Flue 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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WhatsApp: +86 18221755073Research on the method of improving the influence of chloride ion on the performance of desulfurized gypsum products [J]. New building materials. 2014, 11: 41-45.
WhatsApp: +86 18221755073Liu, S., Liu, W., Jiao, F., Qin, W., & Yang, C. (2021). Production and resource utilization of flue gas desulfurized gypsum in China - A review.
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WhatsApp: +86 18221755073mortar. 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
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