• The role of gypsum in cement | Indian Cement Review

    The waste/effluent containing sulphuric acid is neutralised with limestone to produce large quantities of chemical gypsum in these industries. This gypsum exhibit similar performance to mineral gypsum however the gypsum is available as wet cake with moisture contents up to 25 to 30 per cent, the cement plants have to handle the wet chemical ...

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  • Anhydrite Mineral | Uses and Properties

    It is also used along with gypsum to produce plaster, joint compound, wallboard, and other products for the construction industry. Anhydrite has also been used as a source of sulfur in the production of sulfuric acid. Synthetic Anhydrite. Hydrofluoric acid is produced using fluorite and sulfuric acid. For every ton of hydrofluoric acid produced ...

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  • phosphoric acid plant and synthetic gypsum plant

    2. Synthetic Gypsum Comes in Many Forms. Synthetic gypsum is the name used to classify a variety of gypsum byproducts. The most common gypsum byproduct is FGD gypsum. When referencing synthetic gypsum, most people are likely referring to FGD gypsum. However, there are small quantities of synthetic gypsum created through various acid ...

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  • Potential Phosphogypsum Use

    Phosphogypsum, however, is slightly more radioactive than natural gypsum. The radium that is found naturally associated with phosphate rock becomes associated with the phosphogypsum after the rock is reacted with sulfuric acid. The EPA prohibits the use of …

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  • How we make our fertilizer | Yara International

    To produce a phosphorus fertilizer, the rock is treated with acid; sulfuric, phosphoric or nitric. Each method has its advantages and constraints. The sulfuric acid route produces a low phosphorus fertilizer – single superphosphate which is half gypsum. The use of phosphoric acid produces a higher concentration phosphorus fertilizer.

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  • Thermodynamic Modeling of Calcium Sulfate Hydrates in a ...

    For example, when studying the solubility of anhydrite in 50–97 wt % sulfuric acid, Dvegubskii and Shchiponikova discovered that the measured solubilities of anhydrite at temperatures of and K in 60 wt % (15 mol/kg) sulfuric acid are and g/100 g solution ( and mol/kg), respectively. However, the experimental ...

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  • Sulphuric Acid News

    The plant, located in Darrow, takes spent sulfuric acid and converts it to fresh, commercialquality sulfuric acid. Refineries use sulfuric acid as a catalyst to produce highoctane gasoline. The expansion involves installing new equipment and upgrading existing equipment, which will result in a 15 percent increase in sulfuric acid regeneration ...

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  • Sulfur The Environmental Literacy Council

    In fact, sulfuric acid is the most commonly manufactured chemical in the world and more sulfuric acid is produced in the US than any other industrial chemical. Furthermore, it is the least expensive commercial acid and can be shipped in its pure form. Sulfuric acid is a component of insecticides, fungicides, pesticides, preservatives, and ...

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  • US3929416A Process and apparatus for producing gypsum ...

    When limestone is reacted with sulfuric acid to produce gypsum, the limestone and sulfuric acid, which are continuously fed to a reactor, are moved through the reactor and a discharger while rotating reactants and products in course of a gypsumforming process. Gypsum lumps are continuously obtained as a product thereby.

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  • Sciencemadness Discussion Board Sulfuric acid from ...

    Oct 06, 2013· Sulfuric acid from gypsum I have made the following research: 2 CaSO4 + 2 SiO2 + C → 2 CaSiO3 + 2 SO2 + CO2 SO2 + O2 (V2O5400600C) → SO3 SO3 + H2O → H2SO4 This dictates that 2720 grams of calcium sulfate would generate 1960 grams of sulfuric acid by theory. The idea is that the gypsum is roasted with sand and coke at high temperatures.

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  • Sulfuric acid Wikipedia

    Sulfuric acid (American English) or sulphuric acid (historical spelling), also known as oil of vitriol, is a mineral acid composed of the elements sulfur, oxygen and hydrogen, with molecular formula H 2 SO is a colorless, odorless, and viscous liquid that is soluble in water and is synthesized in reactions that are highly exothermic.

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