Although the preparation of calcium sulfate whiskers using salt gypsum is a valuable concept, the use of untreated salt gypsum—which contains numerous impurity ions (such as Na +, Mg 2+, and K +)—has a considerable impact on the morphologies of the resulting calcium sulfate whiskers, leading to unstable whisker quality [5].

Name:gypsum whisker,CAS:.Use:Use as a medium strength filler. In particular, the reinforcing effect of the fine-diameter fiber is the same as that of other high-performance fiber-reinforced materials. ... production method : gypsum dihydrate is converted into α-hemihydrate gypsum by hydrothermal reaction, and fibrous, needle …

LAG is the ideal raw material to replace natural gypsum to produce hemihydrate gypsum (HHG) whiskers, realizing the high-value utilization of industrial by-product gypsum. HHG whisker is a kind of inorganic monocrystalline material with the main composition of calcium sulfate hemihydrate, with a diameter of micro or nano level …

Titanium gypsum (TG) is a industrial gypsum produced during the manufacture of titanium dioxide (TiO 2) by the sulphuric acid process, after neutralisation of the acid waste solution with lime or calcium carbide slag ( Zapata-Carbonell et al., 2019, Zhai et al., 2020 ). At present, every 1 ton of TiO 2 produced in China generates about 6 …

Industrial by-product gypsum, the by-product or waste residue produced by various physical and chemical reactions in the industrial production process [6,10], has been an important alternative ...

Facile preparation of α-calcium sulfate hemihydrate whisker from by-product gypsum in chloride-free salt solution system. Wen Wang Baolin Xia. +5 authors. Guixia …

Purity of α-CaSO 4 ·0.5H 2 O whiskers was approximately , where whiteness reached 98.6%. The reuse of the solution enables the process to discharge …

The crystal structure of the FGD gypsum matrix composites was detected using an X-ray powder diffractometer (Bruker D8) in the range of 5°–70° with a scan rate of 10°/min. A scanning electron microscope (QUANTA FEG450) was used to study the crystal morphology and whisker-gypsum interface transition zone of the FGD gypsum matrix …

China Caso4 Whisker Supplier, Gypsum Whisker, Magnesium Salt Whisker Manufacturers/ Suppliers - Shanghai Covio Industry Limited ... Industrial Equipment & Components; Instruments & Meters; Light Industry & Daily Use ... we set up a plant which had 500 tons CaSO4 Whisker integration with testing and R& D. In the expanding …

Fiber gypsum board production process and equipment are characterized in that desulphurization gypsum of a power plant or other natural gypsum is crushed and then placed into a still kettle, a proper amount of crystal modifier is added into the still kettle to realize high-temperature and high-pressure digestion, gypsum liquid slurry alpha is …

CaSO2.2H2O is an acid-insoluble scale; thus, it requires an effective scale dissolving recipe. Herein, we demonstrate the use of lactic acid (C3H6O3) as an emerging green chemical to remove gypsum ...

Abstract: As a recycled material, flue gas desulfurization gypsum has been used to prepare calcium sulfate hemihydrate whisker (CSHW) through hydrothermal synthesis for several decades. However, the subsequent utilization of this resultant material has not yet received considerable attention. In the present research, CSHW was successfully synthesized at …

Alcohol–water solution-mediated transformation of gypsum into α-hemihydrate (α-HH) whiskers provides a green alternative for the high-value-added recycling of flue gas desulfurization (FGD) gypsum. …

In comparison to alternative inorganic whisker materials, α-HH whiskers offer notable cost-effectiveness, eco-friendliness, and possess strong market competitiveness [18]. This positions them with promising prospects for development. The production of α-HH whiskers can be achieved using industrial by-product gypsum.

This limits their wide application in practical projects. Calcium sulfate whisker (CSW), the cheapest whisker (about USD 465 per ton), is expected to replace these expensive materials in improving toughness. CSW, 10 μm to 300 μm in length and 1 μm to 40 μm in diameter, can serve as a kind of micron fiber or ultra-fine inorganic filler.

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The byproduct gypsum can be utilized to produce hemihydrate calcium sulfate whisker, and the roasted heavy metal precipitation can be used as a primary chromium raw material (Cr2O3 content is ...

DOI: 10.1016/J.PROENV.2016.02.112 Corpus ID: 101722382; Preparation of Calcium Sulfate Whisker by Atmospheric Acidification Method from Flue Gas Desulfurization Gypsum @article{Sun2016PreparationOC, title={Preparation of Calcium Sulfate Whisker by Atmospheric Acidification Method from Flue Gas Desulfurization Gypsum}, …

The production of α-HH whiskers can be achieved using industrial by-product gypsum. Consequently, utilizing PG as the foundational material for generating …

Calcium carbonate (CaCO 3) whisker is used as efficient filler in many applications.. CaCO 3 whisker helps to reduce the cost of reinforced composites as compared to other fibers.. Different basic preparation methods for the production of CaCO 3 whisker are discussed.. CaCO 3 whisker is effectively utilized in friction materials and …

The utility model relates to a technical field is made to the gypsum whisker, and a gypsum whisker high-speed filtration equipment of spin-drying is disclosed, including outer barrel, the upper end of outer barrel is covered with outer cover, the ware of lifting by crane is installed to the upper end of outer cover, outer cover and outer barrel are connected …

Wyoming. In total, the US produced an estimated 17.5 million metric tons (Mt) of crude gypsum in 2017, with the states above contributing about 86% to domestic output. US crude production accounted for 13% of global output. For the same year, 400 producers in the nation generated 32.7 Mt of synthetic gypsum. ².

In order to obtain hydrophobic whisker for preparing polymeric composite product, the calcium sulfate whisker (CSW) prepared from flue gas desulfurization (FGD) gypsum by hydrothermal synthesis was modified by various surfactants, and the effects of some modification conditions on the hydrophobic property of CSW were …

The results showed that the optimum W/S ratio, cement content and water-reducing agent are 0.9, 10% and 2 wt% for the calcined gypsum from titanium gypsum, respectively. The 5.96 MPa was attained after 7 days of ageing. It was also found that the citric acid is inappropriate to be used in the production of gypsum blocks from TiO2 production by ...

Such technique realized the high-value utilization of industrial by-product gypsum, guided the HHG whisker preparation via the green and convenient method and reduced the environmental hazards ...

DOI: 10.1016/j.cjche.2020.05.021 Corpus ID: 219511603; Calcium sulfate whisker prepared by flue gas desulfurization gypsum: A physical–chemical coupling production process

LAG is the ideal raw material to replace natural gypsum to produce hemihydrate gypsum (HHG) whiskers, realizing the high-value utilization of industrial …

This paper summarizes the generation process, impurity removal treatment (physical method, chemical method, heat method), high-value utilization (nanometer …

Calcium sulfate whiskers (CSWs) are columnar crystalline synthetic microfibers with excellent heat resistance, high elastic modulus, and good processability [20], [21].CSWs not only offer the advantages of a fiber and inorganic filler, but also have the same chemical composition as that of the gypsum matrix, which results in good …

@article{Wang2023FacilePO, title={Facile preparation of $alpha$-calcium sulfate hemihydrate whisker from by-product gypsum in chloride-free salt solution system}, author={Wen Wang and Baolin Xia and Xinyan Suo and Weijun Peng and Ling Zhang and Yijun Cao and Yukun Huang and Guixia Fan}, journal={Journal of Environmental …