· Using phosphogypsum (mainly composed of dihydrate gypsum) as raw material to prepare α-hemihydrate gypsum (α-HH) is an effective way for high-value utilization of phosphogypsum solid waste. Sodium ions can effectively promote the transformation of dihydrate gypsum to α-HH and enhance the driving force of crystal
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Gypsum and anhydrite are the hydrated and anhydrous forms of calcium sulphate, which occur in nature as evaporate deposits in the form of nodular masses or beds up to a few metres thick. Gypsum is formed by the hydration of anhydrite at or near surface, but usually passes into anhydrite below 40 to 50 metres.
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· Section snippets Materials Hemihydrate gypsum (β-CaSO 4 •1/2H 2 O, purity>97.0%) was obtained from Acros Organics, Germany, and its particle size distribution and morphology are shown in Fig. 1. Its mean particle size
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The natural dihydrate gypsum (CaSO4·2H2O) is also called raw gypsum. After calcination and grinding, β hemihydrate gypsum (CaSO4·H2O), that is, building gypsum, also be
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· A large amount of FGD gypsum is required to promote plant growth, although desulfurized flue gas with high boron and low levels of CaSO 3 is harmful to plant growth. Overall, FGD gypsum improved the growth response of forage plants grown in sterile low-pH soils ( Clark and Baligar, 2003 ).
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· This study combined inorganic α-hemihydrate gypsum (α-HHG) with organic polyacrylamide (PAM) hydrogel to create a novel α-HHG/PAM composite material. Through this facile composite strategy, this fabricated material exhibited a significantly longer initial setting time and higher mechanical strength compared to α-HHG. The
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· FGD gypsum was supplied by a power plant in the Henan Province, China, and was purified in accordant with a previously reported procedure (Wang et al., 2015). Analytical grade H 2 SO 4 and CuCl 2 were purchased from Luoyang Chemical Reagent Co. (Luoyang, China).
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· The objective of this study was to assess the feasibility of using the plant-source polymer of the matcha powder as a composite admixture for hemihydrate gypsum. Hemihydrate gypsum was mixed with different contents of matcha powder, and then the water requirement for the normal consistency, setting times, density, strength, hydration
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· Section snippets Materials The FGD gypsum used in the experiment was provided by a power plant in Xintai, China. The chemical composition of FGD gypsum is shown in Table 1. The analytical reagents CaCl 2, MgCl 2, NaCl, KCl, Na 2 SO 4, MgSO 4 and the crystal modifier maleic acid (MA) and succinic acid (SA) used to simulate the
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· engineer to build anhydrite to gypsum plant engineer to build anhydrite to Mould Gyp Grinder Plant Phosphorus gyp equipment plant desulfurized gypsum machine plant for sale chemical gyp محطم plant equipment needed for mining iron ore TY is a leading Phosphorus gypsum محطم plant supplier hemihydrate gypsum محطم plant
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Technologies Hemihydrate a gypsum discharge facility.Conversion of the dihydrate into alpha hemihydrate and final filtration :.Operator training simulator for phosphoric acid
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DOI: 10.1016/j.jcrysgro.2021.126360 Corpus ID: 241731164 Preparation of hemihydrate gypsum with controllable morphology in Glycerol-NaCl-Water solutions with maleic acid In this study, a simple and efficient strategy is developed to synthesize rod-shaped α
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Calcination in a rotary kiln is a direct, long-time calcining process. During the process, the phases of the CaSO 4 x H 2 O system can be optimally adjusted. Rotary kilns are used for the calcining natural gypsum. In this process, pre-crushed natural gypsum is calcined in parallel flow with the flue gas.
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DOI: 10.1016/j.mtsust.2023.100644 Corpus ID: 266518658 Coordinated disposal of FGD gypsum and power plant concentrated brine via preparation of α-hemihydrate gypsum @article{Pang2023CoordinatedDO, title={Coordinated disposal of FGD gypsum and
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SBM gypsum mining equipment to process gypsum includes Jaw Crusher, Cone Crusher, Impact Crusher, Roller Crusher, Hammer Crusher, Trapezium Grinding Mill, LM series
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· Using solar energy to dehydrate gypsum to produce β-hemihydrate is one way to improve the carbon footprint 13,14 . Alternatively, α-hemihydrate is produced from gypsum using an autoclave process 15.
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· It was apparent that the conversion of hemihydrate to gypsum was postponed and decreased at pH 11.08. The hydration degree was 2.03% after 2 h hydration and only came up to 41.28% after 1 d hydration, and decreased by
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· A gypsum powder making machine, also known as a gypsum powder production line or gypsum powder processing plant, is used to produce gypsum powder from raw gypsum ore. Gypsum is a mineral composed
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α-hemihydrate (α-HH), known for its exceptional mechanical properties, is a widely used building material. Despite its advantages, the traditional method of producing α-HH through regular pressure brine poses significant drawbacks. These include substantial industrial salt demands, high production costs, and water pollution. A more environmentally friendly α
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