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Gypsum - Wikipedia

Gypsum is a soft sulfate mineral composed of calcium sulfate dihydrate, with the chemical formula CaSO 4 ·2H 2 O. It is widely mined and is used as a fertilizer and as the main constituent in many forms of plaster, blackboard/sidewalk chalk, and drywall.A massive fine-grained white or lightly tinted variety of gypsum, called alabaster, has been used for sculpture by many cultures including

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Why Is Desulfurized Gypsum Briquetting

Gypsum Briquette Making Machine. The strong briquetting machine is mainly used for coal powder coal clay coke coke powder refractory and metallurgical powder cold pressed Pellet. Why using desulfurized gypsum briquette making. 2019-6-28gemco briquette making machine can make briquettes of 20-80mm in diameter briquetting rate is as

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A facile method of transforming FGD gypsum to α

01.08.2017· Traditionally, the gypsum can be used as the raw material of a cement retarder 1, or processed to the building gypsum (β- CaSO 4 ·0.5H 2 O) 2 or high-strength gypsum (α-

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Flue gases: Gypsum dewatering in

Phosphogypsum is the calcium sulfate hydrate formed as a by-product of the production of fertilizer from phosphate rock. It is mainly composed of gypsum. Although gypsum is a widely used material in the construction industry, phosphogypsum is usually not used, but is stored indefinitely because of its weak radioactivity caused by the presence of naturally occurring uranium and thorium, and their daughter isotopes radium, radon and polonium. The long-range storage of phosphogypsum

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flue gas desulfurization gypsum briquetting press

Gypsum briquette machine is used to briquette gypsum to make it with shapes like ball pillow etc most of the gypsum used are the desulfurization gypsum so it is always called as desulfurization gypsum briquette machine for this wide usage besides another common gypsum for briquetting is phosphogypsum from the fertilizer plant.

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Global Synthetic Gypsum Market 2021-2027 -

19.05.2021· Synthetic gypsum is used by the manufacturing companies to save the cost. They also use the synthetic gypsum because of the environmental benefits of the by-product. The different types of synthetic gypsum that are suitable for the manufacturing of the drywall are flue gas desulfurization gypsum, citrogypsum, flurorgypsum, and titanogypsum.

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CA1258961A - PROCESS FOR PRODUCING .alpha.

TITLE OF THE INVENTION: PROCESS FOR PRODUCING .alpha.-FORM GYPSUM HEMIHYDRATE ABSTRACT OF THE DISCLOSURE: Disclosed herein is a method for producing .alpha.-form gypsum hemihydrate, comprising heating an aqueous slurry containing gypsum dihydrate and a salt of sulfosuccinic acid as the catalyst for crystallization, thereby converting gypsum dihydrate into .alpha.-form gypsum

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Desulfurization of phosphogypsum (Patent) |

Desulfurization of phosphogypsum. Full Record; Other Related Research; Abstract. Phosphogypsum is mixed with fine coal, balled, and charged to a travelling grate where the charge is heated under reducing conditions to evolve sulfur and/or sulfur dioxide for conversion into sulfuric acid.

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All Things Gypsum: Chinese Drywall

04.11.2009· By code, all gypsum board used in the U.S. must meet the internationally recognized consensus standard, ASTM C 1396, Standard Specification for Gypsum Board. This standard requires each gypsum panel or package to have specific information marked on it: the thickness, the name of the producer or supplier, the brand name, and the ASTM specification for the product.

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CA1258961A - PROCESS FOR PRODUCING .alpha.

TITLE OF THE INVENTION: PROCESS FOR PRODUCING .alpha.-FORM GYPSUM HEMIHYDRATE ABSTRACT OF THE DISCLOSURE: Disclosed herein is a method for producing .alpha.-form gypsum hemihydrate, comprising heating an aqueous slurry containing gypsum dihydrate and a salt of sulfosuccinic acid as the catalyst for crystallization, thereby converting gypsum dihydrate into .alpha.-form gypsum

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