Given the issues related to poor hydration activity, long setting time and low early strength of industrial by-product fluorogypsum (FG), the composite modifiers (Na 2 SO 4 and NaNO 2) were utilized to enhance its reactivity.The investigation of the mechanism involved the utilization of contemporary analytical methods, including X-ray diffraction (XRD), 1 H low-field …
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Investigation of properties of fluorogypsum-slag composite … Other gypsum-rich tailings such as ''borogypsum" and ''fluorogypsum" formed from the production of boric acid and hydrofluoric acid, respectively (Lin et al., 2011(Lin et al.,, 2018 Garg and ... WhatsApp: +86
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Fluorogypsum is generated during the production of hydrofluoric acid from fluorspar (a mineral composed of calcium fluoride) and sulfuric acid. Fluorogypsum is discharged in slurry form and gradually solidifies into a dry residue after the liquid has been allowed to evaporate in holding …
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In this paper, microbial induced calcite precipitation (MICP) was adopted as a modifying technology for surface property enhancement of supersulfated cement (SSC) containing phosphogypsum (PG).
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To enhance both early strength and mitigate potential surface frost issues in fluorogypsum samples, we employ a combination of sodium nitrite and sodium sulfate. This …
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FGD gypsum is formed when fossil-fueled power plants utilize flue gas desulfurization systems to remove sulfur dioxide from gas pollutants. Using a process referred to as 'scrubbing,' gas pollutants are fed through calcium carbonate to eliminate impurities and environmental concerns.
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This study investigates the mechanical and durability properties of blends made of fluorogypsum (FG) with the pH adjusted by using controlled amounts of circulating fluidized bed combustion ash (CFBCA) and denoted as C-FG, class C …
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Fluorohypsum is a solid, large-tonnage waste generated during the production of hydrofluoric acid. The volume of accumulated waste in the world is hundreds of millions of tons, which makes its utilization an increasingly urgent task. This article presents the results of research aimed at the use of fluorohypsum as a component of building materials. On the basis of the …
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This study investigates the mechanical and durability properties of blends made of fluorogypsum (FG) with the pH adjusted by using controlled amounts of circulating fluidized …
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The specific surface areas of sealed-cured hardened cement pastes (HCP) were evaluated during the hydration process using three types of Portland cement and with two different water-to-cement ratios.
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The article is devoted to modifications of fluorogypsum compositions by chemical additives of sodium salts in the form of sulfate, sulfite and sodium sulfide, as well as their combined effect on ...
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The acceleration mechanisms of the two were also found to be different: K 2 CO 3 increased the hydration of fluorogypsum by forming an unstable double salt syngenite; while KHCO 3 mainly promoted the formation of dihydrate gypsum through a 'catalysis effect' by unstable potassium bisulfate.
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Fluorogypsum, a waste product of hydrofluoric acid industry, has been blended with Ca(OH)(2) and chemical additives followed by fine grinding to give plaster/binder of low consistency, high ...
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Fluorogypsum, a waste product of hydrofluoric acid industry, has been blended with Ca (OH) (2) and chemical additives followed by fine grinding to give plaster/binder of low consistency, high...
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FLUOROGYPSUM can advantageously replace traditional cement as a binder for screed mortars. It is widely used in floor screen applications because of its numerous advantages: better fluidity for self-levelling, greater dimensional stability, high mechanical strength and outstanding thermal
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Present studies deal with the formulation of sulphate resistant super sulphated cement using flourogypsum (83 %), granulated blast furnace slag (10 %) and OPC (7%) by grinding and...
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FGD gypsum is a by-product of the recovery of sulfur oxides from the flue gases generated at power plants that burn coal. A natural contaminant of coal, sulfur is almost completely …
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A composite binder of high strength and low water absorption has been developed using industrial by-products fluorogypsum, granulated blast furnace slag and Portland cement.The development of strength in the binder at an early age is attributed to the conversion of anhydrite into gypsum and at later age is due to the formation of ettringite and tobermorite, as a reaction …
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The acceleration mechanisms of the two were also found to be different: K 2 CO 3 increased the hydration of fluorogypsum by forming an unstable double salt syngenite; while …
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The raw materials like fluorogypsum, GBFS and ordinary Portland cement were supplied by M/s Meta Dynamics, South Africa to formulate super sulphated cement. 2.1 Fluorogypsum The sample of fluorogypsum having a fineness of 3200 cm2/g, Blaine was dried at 42oC to constant weight and cooled to ambient temperature.
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To enhance both early strength and mitigate potential surface frost issues in fluorogypsum samples, we employ a combination of sodium nitrite and sodium sulfate. This study focuses on the effect of Na 2 SO 4 and NaNO 2 on the modification of fluorogypsum, and the performance of the modified fluorogypsum in construction applications was assessed ...
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Fluorogypsum is generated during the production of hydrofluoric acid from fluorspar (a mineral composed of calcium fluoride) and sulfuric acid. Fluorogypsum is discharged in slurry form and gradually solidifies into a dry residue after the liquid has been allowed to …
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The industrial waste fluorogypsum (FG), which has adverse effects on people and the environment, is composed of calcium sulfate (CaSO ... early strength agent, and water reducing agent as additives together formed the raw mate-rial of the new FG-based paste filling material.
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FLUOROGYPSUM FLUOROGYPSUM is also known as anhydrous calcium sulphate USES FLUOROGYPSUM FLUOROGYPSUM is typically used as a desiccant, to remove moisture …
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FLUOROGYPSUM can advantageously replace traditional cement as a binder for screed mortars. It is widely used in floor screen applications because of its numerous advantages: better …
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Upon the addition of fluorogypsum, which provides SO 4 2-, AFt is formed as part of its hydration products (see (5), (6)). Simultaneously, with the inclusion of 10 wt% fluorogypsum and 0.2 wt% KH 2 PO 4, altering the pH value of the cement slurry leads to an increased generation amount of AFt along with a modified morphology characterized by ...
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Fluorogypsum, a waste product of hydrofluoric acid industry, has been blended with Ca (OH) (2) and chemical additives followed by fine grinding to give plaster/binder of low …
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FLUOROGYPSUM FLUOROGYPSUM is also known as anhydrous calcium sulphate USES FLUOROGYPSUM FLUOROGYPSUM is typically used as a desiccant, to remove moisture where dry conditions are required. PRODUCT DESCRIPTION FLUOROGYPSUM The anhydrous form of calcium sulphate occurs naturally as β-anhydrite. Its
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Synthetic gypsumis created as a by-product of industrial processing. It is composed of calcium sulfate dihydrate, has the same characteristics as natural gypsum, and is a high-quality and environmentally friendly product.
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The industrial waste fluorogypsum (FG), which has adverse effects on people and the environment, is composed of calcium sulfate (CaSO ... early strength agent, and water reducing agent as additives together formed the raw mate-rial of the new FG-based paste filling material. Meanwhile, FG was replaced by sulfoaluminate cement and ...
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