Novel waste bone recovery system for CO2 and SOx

The base cases can only generate revenue from the sale of desulfurized gypsum; however, the proposed system can synthesize CaHPO 4 ∙2 H 2 O from waste bone in addition …

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The Key Application Technology of Desulfurized Gypsum in …

particle size. Since desulfurized gypsum contains water with a mass fraction of about 10%, it also contains impurities such as fly ash, organic carbon, calcium carbonate, calcium sulfite, and …

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Steering the early strength of clinker-free cementitious mortar by

The binders used in this study included granulated blast furnace slag (GBFS), steel slag (SS) and desulfurized gypsum (DG). Wet DG was provided by a thermal power …

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Novel wastewater recovery process for sustainable sodium carbonate

Thus, during the desulfurization process, 99% of SO x was captured in the upper part of the scrubber, resulting in the production of 0.000273 kmol/h of desulfurized gypsum. An …

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Resource utilization of flue gas calcium-based desulfurization …

Usually, the raw material for the preparation of calcium sulfate whiskers is natural gypsum, but natural gypsum is a non-renewable resource with decreasing natural reserves. ...

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A brief review on flue gas desulfurization gypsum recovery toward

Newly developed technology can transform FGDG into calcium carbonate while capturing CO 2 in the flue gas. The development of FGDG carbonation can recover Ca and S resources and …

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Effective recovery of calcium and sulfur resources in FGD gypsum

Flue gas desulfurized (FGD) gypsum is produced during the removal of SO 2 from flue gas. The reductive decomposition of FGD gypsum to calcium sulfide (CaS) is a crucial …

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Utilization of flue gas desulfurization gypsum to produce green …

Flue gas desulfurized gypsum (FGDG) is an industrial by-product discharged from thermal power plants, smelters, and large-scale enterprise boilers. ... It should be noted that …

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Influence of sodium silicate on the properties of ground granulated

Influence of sodium silicate on the properties of ground granulated blast furnace slag-desulfurized gypsum (GGBS-DG) based composite cementitious materials and LCA evaluation. Author …

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Utilization of low-quality desulfurized ash from semi-dry flue gas

The annual production of desulfurized ash from newly added by-products in China is approximately 15 million tons, and it will accumulatively reach several billion tons by 2020 …

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A novel resource utilization of the calcium-based semi-dry flue …

In the calcium-based semi-dry FGD process, hydrated lime is generally used as SO 2 sorbent in the form of slurry, and the lime slurry is sprayed into a spray scrubbers. The …

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CN108911726B

The invention discloses a coal gangue-desulfurized gypsum-calcium carbonate system water permeable ceramic tile and a preparation method thereof. Wherein, the gas released by the …

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Resource utilization of flue gas calcium-based desulfurization …

Calcium-based desulfurization by-products can be divided into two categories: desulfurization gypsum and desulfurization ash. Desulfurization gypsum is mainly produced in …

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CN119683668A

The present invention provides a treatment method for desulfurized gypsum slurry of a limestone-gypsum method, firstly, ammonia water is added to the desulfurized gypsum slurry and …

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CN104849173A

The invention discloses a method for determining the contents of calcium sulfite and calcium carbonate in desulfurized gypsum, which belongs to a method for determining the contents of …

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Desulfurization of calcium fluoride sludge for reuse by selective

Therefore, it is important to explore methods that are specific for purification of fluorite sludge. Takaya et al. investigated the feasibility of carbonation with Na 2 CO 3 to …

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Desulphurisation

The SO 2 is washed out with water oxidized to sulfates, SO 3, in the aqueous solution, and precipitated with calcium from the limestone/quicklime into dihydrous calcium sulfate (CaSO 4 …

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Recent advances in flue gas desulfurization gypsum processes …

Synthetic dyes, used in several industries, are prevalent water contaminants. The use of gypsum to remove Basic Red 46, a common dye used in ... asphalt, carbonate …

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Method for synthesizing calcium carbonate from desulfurized gypsum

The above methods can successfully convert desulfurized gypsum into calcium carbonate, but it is not difficult to find that the synthesis process of these methods is carried out in a liquid phase …

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Production and resource utilization of flue gas desulfurized gypsum …

Flue gas desulfurized gypsum mainly comes from thermal power plants, smelters, and large-enterprise boilers, and contains industrial by-products produced through a wet …

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CN102671523A

The method disclosed by the present invention for fixing CO2 by-product light calcium carbonate with humate and desulfurized gypsum, selects desulfurized gypsum and humate as raw...

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Main uses of power plant desulfurization gypsum | LZZG

The desulfurized gypsum powder also contains silica, sodium oxide, calcium carbonate, calcium sulfite, limestone, calcium chloride, magnesium chloride, etc. Compared …

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CN101337684A

The invention relates to a method for recycling calcium carbonate from free gypsum dehydration in co-production. The method comprises the steps of taking carbon monoxide as a reducing …

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CN104451856A

A method for preparing calcium sulfate hemihydrate whiskers using desulfurized gypsum from iron and steel plants as raw material, first adding sulfuric acid to desulfurized gypsum to remove …

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Calcium sulfate whisker one-step preparation using semi-dry flue …

Calcium sulfate whiskers were prepared under hydrothermal conditions by a one-step method using semi-dry flue gas desulfurization ash with iron ore sintering as the raw …

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Utilization of low-quality desulfurized ash from semi-dry flue gas

About 1.85% calcium oxide is also contained in desulfurized ash except for calcium sulfite, calcium carbonate, dihydrate gypsum and calcium hydroxide. Calcium oxide can …

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CN102671523B

The invention discloses a method for fixing light calcium carbonate as CO2 byproduct by using humate and desulfurization gypsum. The method comprises the following steps of mixing …

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Recent advances in flue gas desulfurization gypsum processes …

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, chemical and …

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Carbonation test of dry desulfurized gypsum.

Coupled gypsum dissolution-calcium carbonate precipitation experiments were performed in closed system reactors and in the presence of either aqueous 0.1 M Na2CO3, 0.1 M NaHCO3 or 0.1 M Na2CO3 + 0 ...

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Emission reduction process for dechlorinating flue‐gas desulfurization

Using FGD gypsum to remove Pb and Cd from solutions, ... According to the ACAA (American Coal Ash Association), 1 chloride content in the desulfurized gypsum should …

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