The ultra high addition of 20 % desulfurized gypsum is beneficial to improve the strength of DG based binary cementitious materials with low energy consumption The increased strength of DG based binary cementitious materials is
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 environmental performance were
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
This study was of great significance for efficient utilization of desulfurized gypsum and mastering its conversion characteristics to α hemihydrate gypsum Key words dihydrate gypsum α hemihydrate gypsum ethylene glycol crystallization kinetic model
Ship emissions problems caused by the rapid development of maritime trade can t be ignored The NOX SOX CO2 PM and other toxic substances contained in the exhaust gas are extremely harmful to
An innovative approach suggests using titanium slag and flue gas desulfurized gypsum as substitutes for Portland cement for soil solidification This study systematically evaluates the effects of titanium slag flue gas desulfurized gypsum Portland cement composite TS FGD OPC composite solidifier on the performance of solidified soils
Integration of flue gas desulfurized gypsum FGD gypsum with cover crops is expected to improve soil quality SQ Our objectives were to evaluate the impact of FGD gypsum and rye on SQ and the contribution of core indicators to account for SQ variability in a rainfed corn soybean system A completely randomized design CRD with two FGD
Desulfurized gypsum is a by product of the FGD process a technology that uses lime limestone to recover sulfur dioxide from flue gas from burning coal or oil The technology is to grind lime limestone into powder through a desulfurized gypsum mill and then configure it into a slurry so that the SO2 containing flue gas after dust removal is
The binders used in this study included granulated blast furnace slag GBFS steel slag SS and desulfurized gypsum DG Wet DG was provided by a thermal power plant SS and GBFS were provided by a steel smelting facility in Shanxi province The chemical compositions of the above raw materials are shown in Table 1
In 28d of hydration with the increase of desulfurized gypsum content the pore size of mortar decreases so that the porosity decreases from % to % This also makes the diameter of Nyquist curve of mortar gradually increase and the volume resistance increases continuously The volume resistance of mortar with 20 % desulfurization
Influence of Sodium Methyl Silicate on Waterproof Property of Desulfurized Gypsum Block HE Tingshu KANG Zeqian CHEN Chang College of Materials Science and Engineering Xi an University of Architecture and Technology Xi an 710055 China Abstract
Ltd ; Desulfurization gypsum Huainan Thermal Power Plant The content of hemihydrate gypsum and dihydrate gypsum are % and % 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;
Tens of millions of tons of desulfurized gypsum can be produced in China every year Desulfurization gypsum is used as an admixture to replace part of cement in concrete And the smaller the particle size of desulfurized gypsum the better the mechanical properties of cement mortar The compressive and flexural tests show that the cement mortar with 3% and 4%
In this study the potential of using desulfurized gypsum DG phosphogypsum PG gypsum dihydrate G and calcium carbide slag CS in the production of supersulfated cement SSC was investigated The effects of various types of gypsum and their dosages on the performance and hydration process of SSC were thoroughly examined The results
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 Chinese
Like natural gypsum the application of flue gas desulfurization gypsum FGDG with irrigation provides economic and environmental value Wang and Yang 2018; Watts and Dick 2014 FGDG is of low cost because it is a side product of sulfur removal from fuel combustion in coal fired power plants and does not require mining and processing
The Portland cement fly ash desulfurized gypsum composite solidifier brings the dredged soil to have higher strength and good resistance to dry wet cycles [24] Titanium slag is the residue after the titanium extraction from high titanium type blast furnace slag Currently there are 80 million tons of titanium slag in China with an annual
Because the nature of FGD gypsum is similar to that of natural gypsum some researchers have tried to use it instead of natural gypsum in the improvement of saline alkali land However since some enterprises introduced flue gas purification technology and synergistic mercury removal process several hazardous pollutants in coal would inevitably transfer into
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 Chinese
α [J] 2021 53 4 76 80 Hu Cheng Xiang Weiheng Chen Ping Ming Yang Effects of succinic acid on crystallite morphology and mechanical strength of α hemihydrate desulfurized gypsum synthesized by hydrothermal method[J]
In this paper coal gangue carbide slag and desulfurized gypsum DG were used as raw materials to calcine the all solid waste based belite sulphoaluminate cement BSAC and the hydration and hardening process of BSAC with different DG con EN
