آخرین محصولات
Preparation of α-hemihydrate gypsum whiskers from …
A substantial stockpile of phosphogypsum (PG) not just consumes land resources, but also poses environmental contamination risks. 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.
The Gypsum Board Manufacturing Process …
The production of gypsum boards involves a series of steps that transform the raw materials into finished products. The specific production techniques may vary depending on the equipment and technology used by …
Preparation of high-performance building gypsum by …
One feasible and effective direction is to modify FGD gypsum to produce high performance building materials. This approach will have market potential and vital environmental benefits because it will realize the large-scale utilization of high added value, conserving …
Production method of alpha-gypsum powder with high …
The invention relates to a production method of alpha-gypsum powder with high strength. The production method comprises the following steps: (1) mixing phosphogypsum with a dry basis mass content larger than or equal to 95% with water to prepare slurry; (2) adding a crystal modifier in the slurry, and transforming the crystal under the conditions of the temperature of …
Preparation and Performance Study of Light Weight …
The low-density and high-performance gypsum-based lightweight mortar was prepared by analyzing the mechanical properties, density, water resistance, and microscopic morphology …
Application of the Industrial Byproduct Gypsum in Building …
The industrial byproduct gypsum is a general term for byproducts discharged from industrial production with calcium sulfate as the main ingredient. Due to the high number of impurities and production volume, the industrial byproduct gypsum is underutilized, leading to serious environmental problems. At present, only desulfurization gypsum and phosphogypsum …
(PDF) Lightweight Gypsum Based Materials: …
The main methods of the preparation of gypsum-based lightweight materials are described and compared. Gypsum can be lightened indirectly by the lightweight filler or directly.
Preparation of high-performance building gypsum by …
This study summarized industrial by-product gypsum into eight types (flue gas desulphurization gypsum (FGDG), phosphogypsum (PG), titanium gypsum (TG), salt gypsum …
Preparation of α-hemihydrate gypsum from phosphogypsum in …
The preparation of β-hemihydrate gypsum is an important approach for large-scale utilization of phosphogypsum (PG) because of the simple production technology by calcination. However, the dehydration behaviour and impurity change during the transformation of PG to β-hemihydrate gypsum at low temperatures are unclear.
Gypsum processing and use
Gypsum plaster sets by chemically combining with water to form solid calcium sulphate dihydrate. A special type of plaster, called alpha hemi-hydrate, can be produced by reacting the raw …
Preparation of α-calcium sulfate hemihydrate from …
The preparation of α-calcium sulfate hemihydrate (α-HH) from industrial by-product gypsum is an important way to solve the massive accumulation. α-HH possessing larger, dense and well …
(PDF) A novel method for preparing phosphorus building gypsum …
The preparation of fiber-reinforced phosphorus building gypsum composite materials (FRPGCs) is an important approach to enlarge the utilization of phosphogypsum resources.
CN113402197A
The invention discloses a preparation method of a coagulant for gypsum board production, which comprises the following steps: pretreating the gypsum board saw edge waste to screen out waste protective paper and overfire saw edge waste in the gypsum board saw edge waste to obtain a gypsum dry board; grinding the gypsum dry board under preset conditions to obtain fine …
Calcination Processes | Gypsum: Connecting …
The preparation of natural and synthetic gypsum prior to calcination, such as drying and grinding. The various calcination methods for β-hemihydrate and α-hemihydrate are reviewed, such as batch kettle, continuous kettle, submerged …
11.16 Gypsum Manufacturing
To produce plasters or wallboard, gypsum must be partially dehydrated or calcined to produce calcium sulfate hemihydrate (CaSO4 1⁄2H 2O), commonly called stucco. A flow diagram for a …
Making Gypsum Board
To produce gypsum board, crushed natural gypsum or synthetic gypsum is heated or calcined to dehydrate the feedstock. Next the calcined gypsum is mixed with water and additives to form a …
Preparation of α-High Strength Gypsum from Flue Gas …
The synthesis of α-calcium sulfate hemihydrate (α-CSH) from flue gas desulfurization (FGD) gypsum is a good way to realize the comprehensive utilization of FGD gypsum. To obtain α-CSH with the satisfactory performances, a facile hydrothermal-aging pretreatment process for FGD gypsum raw materials was proposed, where FGD gypsum was …
Lightweight Gypsum Based Materials: Methods of Preparation …
The lightweight gypsum materials can be used in a similar way as an aerated autoclaved concrete (AAC), whose energy consumption at production is several times higher. The main methods of the preparation of gypsum-based lightweight materials are described and compared. Gypsum can be lightened indirectly by the lightweight filler or directly.
Production, characterisation, and application of titanium gypsum…
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 ton of TG (Ma, 2022a, Su …
Preparation of α-calcium sulfate hemihydrate from …
Preparation of α-hemihydrate gypsum (α-HH) from phosphogypsum (PG) by atmospheric hydrothermal method has a good application prospect due to the mild reaction conditions, the solution medium and ...
Reuse of by-product gypsum with solid wastes-derived …
The addition of ordinary Portland cement to beta-hemihydrate gypsum is a common modification method [16], [19]. However, the preparation of ordinary Portland cement typically consumes high energy and leads to high CO 2 emission [20], and ordinary Portland cement-modified GSLM has the drawbacks of low early strength and slow strength …
Effect of composite ratio of composite crystal modifiers on …
Calcined gypsum could serve as cementitious material for the preparation of various eco-friendly building materials, including lightweight plaster [15], [16], etc. Compared to Portland cement, it exhibited many advantages such as eco-friendly energy conservation and lightweight thermal insulation, while its main drawback was its relatively low ...
A kind of titanium gypsum high performance concrete building …
The invention discloses a kind of titanium gypsum high performance concrete building materials and preparation method thereof, including cementitious material slurry S1 and the S2 that gathers materials, the S2 that gathers materials is light-weight aggregate, middle one or two kinds of combinations with arbitrary proportion of commonly gathering materials, and the ratio between …
Preparation of α-hemihydrate gypsum from …
The industrial application of PG is mainly focused on building gypsum (β-CaSO 4 ·0.5H 2 O) [5], α-hemihydrate gypsum (α-CaSO 4 ·0.5H 2 O, α-HH) [6], [7], cement retarder [8], sulfuric acid co-production cement [9], soil conditioner [10] and so on. Among which, the preparation of α-HH using PG is one of the most profitable approaches because α-HH is a …
محصولات مرتبط
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- China Ballmill Specs
- تأثیر دولومیت تجهیزات استخراج سنگ طلا اثر pf1214
- ساخت یک میز ویبره
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