Chemical Information Review Document for Synthetic …
Chemical Hazards, gypsum is the dihydrate form of calcium sulfate. It is a naturally occurring mineral ... In a study of 241 underground male workers employed in four gypsum mines in Nottinghamshire and Sussex for a year (November 1976-December 1977), results of chest X-rays, lung function tests, and ...
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Hydrogeochemistry of groundwater surrounding a pyrite mine …
X-ray diffraction analysis of the common tailings of the Yunfu pyrite mine revealed that the tailings mainly quartz, anorthite, gypsum, pyrite and mica group minerals (Chen et al., 2016). The tailings' major chemical composition is SiO 2, Fe 2 O 3, Al 2 O 3, CaO, and SO 3, with the SO 3 level ranging from 15.89% to 18.27% (Yin et al., 2022).
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Gypsum: mineral characteristics, properties, uses
Alabaster, a form of gypsum. Credit: Wikimedia Commons. Gypsum is a soft sulfate mineral composed of calcium sulfate dihydrate (CaSO4·2H2O). It is renowned for its wide use in the manufacturing ...
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Socio-Environmental Risks Linked with Mine Tailings Chemical
1.1. What Are Mine Tailings? An Initial Scope in an Uncertainty and Complex World. The initial step in mineral processing involves crushing and grinding ore to produce a suitable particle size for further metallurgical processing using physical and chemical separation methods [].Physical separation processes take advantage of the different physical properties …
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Gypsum | Definition, Uses, & Facts | Britannica
Gypsum occurs in extensive beds associated with other evaporite minerals (e.g., anhydrite and halite), particularly in Permian and Triassic sedimentary formations; it is deposited from ocean brine, followed by anhydrite and halite.It also occurs in considerable quantity in saline lakes and salt pans and is an important constituent of cap rock, an anhydrite-gypsum rock forming a …
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Determining the factors controlling the chemical composition …
In this study, 152 mine water samples from 8 coal mines in the Xishan mining area (XSMA) were sampled, and their chemical characteristics and formation mechanism were analyzed comprehensively ...
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Gypsum Mineral Data
Empirical Formula: Ca (SO 4)•2 (H 2 O) Environment: Sedimentary evaporite deposits. IMA Status: Valid Species (Pre-IMA) Prehistoric. Locality: Numerous localities worldwide. Naica, …
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Production and resource utilization of flue gas desulfurized gypsum …
Hao et al. (2017) pointed out that chemical species of heavy metals in the FGD gypsum in China displayed different characters, and concluded that all the heavy metals (i.e., Zn 2þ, Cu 2þ, and ...
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Gypsum Mineral Data
General Gypsum Information : Chemical Formula: CaSO4•2(H2O) Composition: Molecular Weight = 172.17 gm Calcium 23.28 % Ca 32.57 % CaO Hydrogen 2.34 % H 20.93 % H 2 O Sulfur 18.62 ... PE Gypsum = 3.97 barns/electron U=PE Gypsum x rElectron Density= 9.37 barns/cc. Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute ...
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Gypsum: Characteristics, Properties and Uses
Likewise, in these same conditions, the well-known "Rosa del Desierto" is formed, which presents a gypsum rosette shape with sand inclusions. Gypsum and Anhydrite. These two minerals have the same chemical composition, the difference is that anhydrites do not contain water in their structure and gypsum does have this characteristic.
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Analysis of hydration mechanism and microstructure of …
To obtain the compositions and microstructure of hydration products of cementitious material in different hydration ages and its growth law of filling strength, the optimal proportion of composite cementitious material was determined according to the chemical composition of cement clinker which was composed of the Portland cement 32.5R, CSA 42.5 …
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Study on triaxial compression performance and damage …
nology Co. Ltd. The main chemical composition and performance indicators are shown in Table 2. The coal gangue was acquired from the gangue dump of China Shenhua Energy Co. Ltd., Shendong Coal Branch. The chemical composition is shown in Table 3. After on-site sampling is completed, the coal gangue is returned to the laboratory for crushing ...
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Gypsum
Its chemical name is Calcium Sulphate Dihydrate and the chemical formula of gypsum is represented as CaSO 4.2H 2 O. Gypsum and Anhydrite (CaSO 4) are very similar chemically just that gypsum has 2 water molecules and Anhydrite does not contain any water molecules. Physical and Chemical Properties of Gypsum Mineral
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Chemical Characteristics-Based Evolution of Groundwater in …
Groundwater plays an important role in ecological environment protection in arid and semi-arid areas. Therefore, understanding the characteristics of hydrochemical evolution is of great significance for the sustainable use of groundwater in the area of the Tailan River Basin. The Tailan River Basin is located in an arid, ecologically sensitive area in western China. In …
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Hydrogeochemical characteristics and solute sources of …
In mining areas, groundwater resources are crucial for providing drinking water, as well as water needed for plant growth and mining. The Yuhengbei mining area is situated in arid and semi-arid areas in Western China. As there are a number of large-scale mining fields in the area, their exploitation may affect both the quality and quantity of groundwater. The hydraulic …
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Innovative synthesis of high-strength α-hemihydrate gypsum…
High-strength gypsum is the recognized designation for α-hemihydrate gypsum, often referred to as α-HH (CaSO 4 ·0.5H 2 O), which is a cementitious material with low water requirement and high strength [8].The strength of α-HH is generally between 25 and 50 N/mm 2, which is three times that of ordinary building plaster, and has superior working performance. α …
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Gypsum: Properties, Uses, Formation, Types – Geology In
Characteristics & Properties of Gypsum. Composition: Calcium sulfate dihydrate (CaSO₄·2H₂O). This means gypsum is a hydrated sulfate mineral, containing calcium, sulfur, and chemically bound water molecules. ... Gypsum is easy to mine, process, and manipulate. It can be ground into powder, mixed with water to form a paste, or molded into ...
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Commissioner of Geology and Mining
Chemical Composition. The chemical composition of china clay is, hydrous aluminium silicate. Al 4 Si 4 O 10 (OH) 8. Physical Characteristics. ... Commissioner of Geology and Mining. Block 15, Dr.Jivraj Mehta Bhavan, Sector - 10, Gandhinagar - 382010. 079 23254151. [email protected].
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WHAT IS GYPSUM?
gypsum is also mined and quarried throughout Europe. India and Pakistan have gypsum and so have Africa, Australia, China, Japan and South America. In 1964 Jamaica issued a stamp picturing its gypsum industry. There are gypsum mines across North America, and Utah possesses large deserts of powdery gypsum rock.
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What is Gypsum? A Detailed Overview of Its Properties and …
China: One of the largest producers, with extensive mining operations. Iran: Rich deposits in various regions contribute to its substantial production. ... Understanding gypsum's chemical composition, physical characteristics, and environmental impact is crucial for harnessing its full potential in various industries. As the gypsum market ...
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Chemical composition of groundwater and its controlling …
Groundwater is an important component of water resources, and groundwater resources in China account for approximately one-third of the total water resources, whereas approximately 40% of groundwater in China is affected by coal mining activities (Cai et al. 2017; Liang et al. 2018).In recent years, water scarcity and pollution have been increasing, and the …
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Geology
Gypsum has a very low thermal conductivity (hence its use as an insulating filler). A crystal of gypsum will feel noticeably warmer than, for instance, a crystal of quartz. Gypsum is one of the more common minerals in sedimentary …
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Construction and Building Materials
Gypsum resources were abundant and widely dispersed throughout the world, extending more than 60 countries on five continents. The world's largest producer of gypsum, China discovered stores of about 70.43 billion tons.
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Review A comprehensive review of flue gas desulphurized gypsum …
In 2020, global FGD gypsum production reached an estimated 255 million tons, primarily in Asia (55%), followed by Europe (22%), North America (18%), and the rest of the world (5%). The paper discusses the chemical and physical properties of FGD gypsum, including its composition, crystal structure, particle size, and moisture content.
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The average chemical composition of Parakar mine of gypsum
Download scientific diagram | The average chemical composition of Parakar mine of gypsum from publication: Development of non-shrinkable cement based on local raw materials | With an analysis of ...
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Gypsum | Properties, Formation, Uses and Deposits
Gypsum, a naturally occurring mineral with the chemical formula CaSO4·2H2O, exhibits several important chemical properties that contribute to its versatility and usefulness in various applications. Here are some key chemical properties of gypsum: 1. Hydrated Structure:Gypsum is a hydrated …
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Recent advances in flue gas desulfurization gypsum …
According to the U.S. Energy Information Administration's statistics, in the 2006–2016 period, approximately 42% of the electricity consumed in the U.S.A was produced by coal combustion (U.S. Energy Information Administration, 2018).The coal combustion process generates various types of residues such as fly ash, bottom ash, boiler slag, flue bed …
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Chemical compositions of gypsum. | Download Table
Download Table | Chemical compositions of gypsum. from publication: Optimization of clay material mixture ratio and filling process in gypsum mine goaf | Because there is neither waste rock nor ...
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Gypsum
Gypsum is commonly associated with rock salt and sulfur deposits. It is processed and used as prefabricated wallboard or as industrial or building plaster, used in cement manufacture, agriculture and other uses. Type. Mineral …
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Gypsum Mineral | Uses and Properties
Gypsum is an evaporite mineral most commonly found in layered sedimentary deposits in association with halite, anhydrite, sulfur, calcite, and dolomite. Gypsum (CaSO 4. 2H 2 O) is very similar to Anhydrite (CaSO 4).
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