The hammer mill, being a short-time calcining system, grinds, dries, calcines and classifies the raw gypsum in a single step. The resulting stucco is suitable for the production of plasterboard, gypsum fiberboard and gypsum wall blocks. A …
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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 …
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We start with a brief introduction of FGDG production and utilization approaches in practical use with their advantages and disadvantages. Then we systematically summarize two types of …
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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 …
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The results indicate there are differences in the hydration swelling mechanism between α-gypsum and β-gypsum. The expansion of gypsum is the result of the combined …
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Zhengzhou Taida new type desulfurized gypsum calcination drying equipment fills the technology gap at home. This kind of new type drying machine can not only dry materials with 95% moisture content, but also can calcine materials with …
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The DG used had undergone a dewatering treatment, which had transformed its main chemical components into hemihydrate gypsum, a common solid waste used in the construction …
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Gypsum has micro-expansion characteristic during the process of hydration and solidification, and there are certain differences in the hydration expansion characteristics of …
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The objective of this study was to improve comprehensive properties of GSL and prepare qualified desulfurized building gypsum-based self-leveling mortar, which had been …
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BPG primarily consists of desulfurized gypsum, phosphogypsum, and titanium gypsum, which account for 88% of the total BPG in China. The large-scale utilization of these …
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Flue gas desulfurization gypsum (FGDG) is an industrial by-product generated during the flue gas desulfurization process in coal-fired power plants. Due to its abundance, …
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Gao [18] used red mud, blast furnace slag, steel slag, desulfurized gypsum (DG) and carbide slag as raw materials to prepare BSAC. The result shows that the optimum …
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In the wet desulfurization process, starting from the process conditions, the operating parameters were improved and optimized, and the best process conditions were determined. This can …
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The optimal process for preparing road Portland cement with nickel slag is: the contents of nickel slag, limestone, fly ash, steel slag, desulfurized gypsum, and calcium fluoride …
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Fly ash and desulfurized gypsum used in this experiment were from Shanxi Power Generation Co., Ltd. The coal gangue came from Yangquan, Shanxi. The cement was ordinary …
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In this study, by adding a small amount of calcined desulfurization gypsum and aluminate cement into slag powder cement, the effects of calcined desulfurization gypsum and aluminate cement …
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Additionally, after 500 °C calcination pre-treatment, the amounts of P 2 O 5, SiO 2, and CaO decreased while the amounts of SO 3 increased. However, raw and calcined PG had …
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The calcination-treated FGD gypsum would not influence the type and morphology hydration products of the calcium sulfur aluminate cement-fly ash-FGD gypsum system, and …
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After calcination at 120 °C, the main components of FGDG are CaSO 4 ·2H 2 O and CaSO 4 ·0. 5H 2 O; at this temperature, dihydrate gypsum has started to partially convert …
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The compaction effect and settlement were assessed through field tests. Abstract. Flue gas desulfurized gypsum (FGDG) is a waste material produced in the power stations …
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To solve the problem of the low early strength of the fly ash-desulfurized gypsum system, this study innovatively uses sulfate to increase its early strength without shrinking late …
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The gypsum decomposition and formation mechanisms of calcium ferrite are the main focus areas of theoretical research (Higuchi et al., 2016; Dilner et al., 2017; Zheng and …
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Calcination process of desulfurized gypsum (1) Low temperature and slow calcination. Low-temperature slow-speed calcination means that the material stays in the calcination equipment …
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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), …
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Fly ash and desulfurized gypsum used in this experiment were from Shanxi Power Generation Co., Ltd. The coal gangue came from Yangquan, Shanxi. The cement was ordinary …
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gypsum was calcined in the DRY-36 high temperature industrial furnace of Shanghai Kecheng Company. The calcination system was as follows: heating up from room temperature to 800 ℃, …
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The semi-hydrate content of desulfurized gypsum is adjusted as a natural plaster substitute for producing gypsum board, wallboard [107]. The modified treatment of desulfurized …
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Desulfurized gypsum is widely applied to building material industry. Through different ways, it can almost replace majority of natural gypsum. Comprehensive disposal technology in china has …
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