Phosphogypsum constitutes the solid waste discharged during the production of wet-process ... such harsh conditions entail high equipment requirements and accelerate corrosion of the ... Effects of AlCl 3 on the crystal morphology of calcium sulfate whisker prepared from FGD gypsum. 6th Annual International Conference on Material ...
Semantic Scholar extracted view of "Calcium sulfate whisker one-step preparation using semi-dry flue gas desulfurization ash and directional growth control" by Di Zhou et al.
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. However, the role of non-lattice cations during the transformation is still unclear. We report an evolution from "boosting–retarding" to …
This paper reviews the current beneficial applications of titanium gypsum, analyses the practical applications of titanium gypsum in three fields: extraction of useful material, construction material, and soil amendment, and the impact of these applications on the environment, in order to provide a basis for better understanding and application ...
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].
The gypsum whisker dry method transformation method is simplified in production process and equipment, single in heat source, high in efficiency, and low in energy consumption, a transformed product is uniform in crystalline form, high in the ratio of length to diameter, high in crystal strength, and good in toughness.
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 …
The present invention relates to a gypsum whisker. It is a needle alpha-type hemi-hydrated gypsum crystal, its diameter is 2-4 micrometers and its length-to-diameter ratio is 50-100. Its production method uses natural or chemical dihydrated gypsum as raw material, and its process includes the following steps: grinding, preparing slurry material, …
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 …
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 …
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 ...
The calcium alginate produced from C 6 H 9 O 7 Na and gypsum deposited on the surface of CSHWs coarsened the whisker surface, resulting in strong bonding between the MCSHWs and gypsum. (2) The MCSHWs decreased the porosities and improved the mechanical properties of the MCSHW/gypsum composites.
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 …
Herein, the conversion of PG into high-value α-hemihydrate gypsum (α-HH) whisker by the atmospheric pressure salt solution method with simple process, high efficiency and low energy consumption was investigated.
A facile method to transform flue gas desulfurization gypsum (FGD gypsum) to α- calcium sulfate hemihydrate (α-HH) whiskers with high aspect ratios mediated by cetyltrimethylammonium bromide ...
Titanium gypsum is a solid waste produced by sulphuric acid titanium dioxide producers when they neutralise the waste acid with calcium method, and th…
This study provided a theoretical basis for the preparation of hemihydrate gypsum whisker and selection of additives and is conducive to phosphogypsum resource utilisation and industrial production of high-value …
A facile method to transform flue gas desulfurization gypsum (FGD gypsum) to α- calcium sulfate hemihydrate (α-HH) whiskers with high aspect ratios mediated by …
The production of α-HH whiskers can be achieved using industrial by-product gypsum. Consequently, utilizing PG as the foundational material for generating …
A Feasible Route for Preparation of Calcium Sulfate Whiskers from FGD Gypsum via Filtrate Recycle under Hydro-Thermal Conditions. Article.
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 …
The influence of cement, amount of water/solid (W/S) ratio, water-reducing agent, citric acid content and the hydration age on the gypsum blocks was investigated. 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.
Calcium sulfate whiskers (CSWs) were synthesized using purified flue-gas desulfurization (FGD) gypsum as raw materials using a hydrothermal method, where the …
Semantic Scholar extracted view of "Facile preparation of α-calcium sulfate hemihydrate whisker from by-product gypsum in chloride-free salt solution system" by Wen Wang et al.
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 ...
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]. It is therefore ...
The main aim was to prepare CSH whiskers directly from FGD gypsum, without any purification, using the optimized conditions. This is a facile potential alternative process for large-scale production of CSH whiskers using abundant FGD gypsum as source materials.
The synthesis of FGD gypsum-based material, especially the production of calcium sulfate hemihydrate whisker (CSHW), must be improved to further widen the application value of FGD gypsum and achieve the target resource utilization.
LAG is the ideal raw material to replace natural gypsum to produce hemihydrate gypsum (HHG) whiskers, realizing the high-value utilization of industrial by …
Semantic Scholar extracted view of "Influence of modified calcium sulfate hemihydrate whisker on the physical, mechanical, and microscopic properties of gypsum matrix composites" by Duoming Wang et al.