##tihuan2##The desulfurized gypsum application rates varied between 0 and 50 t·hm-2 across six treatment levels, based on the soil Na + and Mg 2+ exchange capacity. A control group was included at 0 t·hm-2. Each treatment consisted of five experimental plots, including three for soil profile sampling and two for backfilling to mitigate the impact of ...
WhatsApp: +86 18221755073
##tihuan2##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.
WhatsApp: +86 18221755073
##tihuan2##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 …
WhatsApp: +86 18221755073
##tihuan2##Paste backfill prepared with ultrafine tailings often faces difficulties in meeting engineering requirements. To address the challenge of using ultrafine tailings, this work utilized a slag cemented ultrafine tailings paste backfill (SCUPB) composed of slag, Portland cement, and desulfurized gypsum as the cementitious materials, with a …
WhatsApp: +86 18221755073
##tihuan2##The effects of desulfurized gypsum, heat-treated desulfurized gypsum and hydrogen peroxide modified desulfurized gypsum on the setting time of Portland cement were studied. The results showed that when the content of desulfurized gypsum after 80 °C heat treatment was 4% of Portland cement, the initial setting time was …
WhatsApp: +86 18221755073
##tihuan2##FGD gypsum was used as cement setting retarder and the influences on the properties of cement were studied by treating FGD gypsum at different heat treatment processes.
WhatsApp: +86 18221755073
##tihuan2##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 …
WhatsApp: +86 18221755073
##tihuan2##XRD, SEM and elemental characterization of FGD gypsum. X-ray diffraction analysis revealed that the characteristic peaks at 2θ value of 11.8, 20.8 and 23.5 (Fig. 2a) of the FGD gypsum 1 suggested ...
WhatsApp: +86 18221755073
##tihuan2##Saline-sodic soil colloids contain a large number of exchangeable sodium ions,leading to soil aggregates breakdown,clay dispersion and soil pores blocking.Saline-sodic soils improvement requires two processes,providing calcium source to exchange with sodium on soil surface and removing salt through leaching or drainage.In this study,we used corn …
WhatsApp: +86 18221755073
##tihuan2##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 for gypsum boards, but there still exist a mass of FGDG due to the lack of reusing methods. ... Thermal treatment and utilization of flue …
WhatsApp: +86 18221755073
##tihuan2##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
WhatsApp: +86 18221755073
##tihuan2##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 ...
WhatsApp: +86 18221755073
##tihuan2##Abstract. The effects of desulfurized gypsum, heat-treated desulfurized gypsum and hydrogen peroxide modified desulfurized gypsum on the setting time of …
WhatsApp: +86 18221755073
##tihuan2##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 …
WhatsApp: +86 18221755073
##tihuan2##Gypsum in the heat treatment process should pay more attention to Hg, because the evaporation rate of gypsum at temperatures above 350 °C is higher than 94%, which is its worst thermal stability. ...
WhatsApp: +86 18221755073
##tihuan2##The desulfurized gypsum from power plant flue gas is the largest resource of industrial by-product gypsum. By adopting advanced processes such as drying and calcination, it is applied in gypsum ...
WhatsApp: +86 18221755073
##tihuan2##Our survey results, which included more than 35 domestic manufacturers of gypsum drying equipment in China, showed that the normal thermal treatment of FGD …
WhatsApp: +86 18221755073
##tihuan2##Abstract. Thermal Power Plant generates FGD gypsum as by-product during coal combustion. This study evaluates the characterization (spectroscopic and elemental), potentially toxic …
WhatsApp: +86 18221755073
##tihuan2##In 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 18221755073
##tihuan2##The desulfurized flue gas from coal-fired power plants is discharged with pollutants and a lot of heat and water vapor into the environment. To synchronously reduce the pollutant emission and recover the heat and water, a novel technology was proposed and applied in a coal-fired power plant after experimental and pilot studies.
WhatsApp: +86 18221755073
##tihuan2##This study discussed the effect of heat treatment (pyrolysis temperature and time) and operating conditions (initial fluoride ions concentration, dosage, solution temperature, and initial pH) on fluoride ions removal efficiency. The results showed that PG was most successful in removing fluoride at 140 ℃ for 5 h.
WhatsApp: +86 18221755073
##tihuan2##Furthermore, changes occurring in the morphology and chemical composition of the gypsum composite following heat-treatment were analyzed by the differential scanning calorimetry, X-ray diffraction ...
WhatsApp: +86 18221755073
##tihuan2##Ltd.); Desulfurization gypsum (Huainan Thermal Power Plant). The content of -hemihydrate gypsum and dihydrate gypsum are 71.4% and 14.7%, respectively. Meanwhile, the chemical composition and phase XRD spectrum of the desulfurized gypsum are shown in Table 1 and Fig. 1, respectively; the TG-DSC analysis curve is shown in Fig. 2;
WhatsApp: +86 18221755073
##tihuan2##The treatment of flue‐gas desulfurization (FGD) gypsum, a common solid waste material that is often affected by chloride ions, typically occupies large amounts of land, causes resource waste ...
WhatsApp: +86 18221755073
##tihuan2##The treatment of flue-gas desulfurization (FGD) gypsum, a common solid waste material that is often affected by chloride ions, typically occupies large amounts of land, causes resource waste, and results in …
WhatsApp: +86 18221755073
##tihuan2##Desulfurization (FGD) gypsum is a common solid waste which will harm the environment if there is a lot of shelving [1] [2] [3]. FGD gypsum may be highly utilized to …
WhatsApp: +86 18221755073
##tihuan2##The influence of the mixture of desulfurized gypsum and natural gypsum on the setting time of cement It can be seen from Figure 5 that the setting time tends to decrease with the increase of the ...
WhatsApp: +86 18221755073
##tihuan2##To investigate the macroscopic mechanical properties and failure evolution mechanism of desulfurization gypsum–fly ash fluid lightweight soil, a microscale numerical model using PFC2D (Particle Flow Code) was constructed. Uniaxial compression tests were conducted to determine the microscopic parameters of the model, extracting information …
WhatsApp: +86 18221755073
##tihuan2##In addition, although the water of crystallization content in gypsum varies with the conditions of its immediate environment, such as temperature or humidity, 60 the chemical composition of gypsum does not change after heat treatment (Equations 3 and 4). 61 However, FGD gypsum cannot be used to manufacture plaster without heat …
WhatsApp: +86 18221755073
0086-21-58386256
Our office time Mon - Sat 10.00AM - 7.00PM Sunday CLOSED
Copyright © 2024.Con All rights reserved.sitemap