Synergistic effect of red mud, desulfurized gypsum and fly …
At present, industrial solid wastes in the world are characterized by high output, many kinds, large differences in physical and chemical properties, and uneven regional distribution [1], [2], [3].Typical industrial solid wastes are classified as: alkaline solid wastes (RM, carbide slag and alkaline slag, etc.), sulfate solid wastes (industrial by-product gypsum and …
CN110064239A
A kind of desulfurized gypsum slurries moisture collection system and construction method desulfurized gypsum slurries moisture collection system provided by the invention, including Rose Box, vacuum plant and filtered water tank, Rose Box includes cabinet and stirring flusher, injection point is offered at the top of cabinet and rinses water inlet, its bottom offers underflow …
CN214829698U
The utility model discloses a desulfurized gypsum washing dechlorination wastewater recovery system, which comprises a desulfurized gypsum washing device, a gypsum slurry dehydration device and a wastewater recovery device; the discharge gate of vacuum belt dehydrator is connected to desulfurization gypsum washing unit's feed inlet, and gypsum slurry dewatering …
Desulfurized Gypsum Market Research Report 2032
The global desulfurized gypsum market size was valued at USD 2.5 billion in 2023 and is projected to reach USD 4.8 billion by 2032, growing at a CAGR of 7.2% during the forecast period.
KR20200057396A
C04B11/262 — Calcium sulfate cements strating from chemical gypsum; starting from phosphogypsum or from waste, e.g. purification products of smoke waste gypsum other than phosphogypsum. ... The desulfurized gypsum and lime in a mixed state are blown by a wind at a constant speed supplied from a blower, and low-purity lime dropped at a short ...
WO2024159639A1
Provided in the present application are a system and a method for accelerating direct mineralization of flue gas carbon dioxide with desulfurized gypsum. The method comprises: absorbing carbon dioxide from a desulfurized flue gas by using ammonia water as an absorbent, so as to obtain an ammonium carbonate absorption liquid; heating a desulfurized gypsum to …
Effective recovery of calcium and sulfur resources in FGD gypsum …
Separation and Purification Technology. Volume 314, 1 June 2023, 123537. ... 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 method for resource utilization. This study investigated the reduction roasting behavior and ...
Resource utilization of flue gas calcium-based …
Calcium-based desulfurization by-products can be divided into two categories: desulfurization gypsum and desulfurization ash. Desulfurization gypsum is mainly produced in …
Application of desulfurization gypsum as activator for …
Recycling industrial solid waste for mine backfill is one of the best ways to achieve green production in multiple industries. In this paper, the desulfurization gypsum (DG) as an activator is combined with the modified magnesium slag-fly ash cementitious paste backfill (MFPB) technology for the co-disposal of solid waste and goaf treatment, and the influence of …
Removing residual chlorine in water using carbon-based …
Utilization of low-quality desulfurized ash from semi-dry flue gas desulfurization by mixing with hemihydrate gypsum Fuel, 255 ( 2019 ), Article 115783, 10.1016/j.fuel.2019.115783 View PDF View article View in Scopus Google Scholar
to purification
Перевод контекст "to purification" c английский на китайский от Reverso Context: This is the path to purification.
Calcium sulfate whisker one-step preparation using semi …
Liu et al. (2016) studied the effects of desulfurized gypsum particle size, slurry concentration, and additive on CSW morphology. ... When the purification concentration was low, only some impurities on the surface of the crystal generated by oxidation may have been removed, and the introduction of sulfuric acid may lower the pH of the solution ...
Purification process of desulfurization gypsum and gypsum …
A desulfurization gypsum and process technology, applied in the direction of calcium/strontium/barium sulfate, etc., can solve the problems of high energy consumption and complex process, and achieve the effects of low energy consumption, simple process parameters and strong operability ... Purification process of desulfurization gypsum and ...
CN111807760A
The invention discloses a preparation process of a desulfurized gypsum-based crystal plastic composite material, which comprises the following steps: s1: preparing nano silver phosphate/desulfurized gypsum powder; s2: grinding the aluminum slag until the particle size is less than or equal to 120 mu m to obtain aluminum slag powder; s3: weighing; s4: mixing the …
Silage and flue gas desulfurized gypsum as additives …
Silage and flue gas desulfurized gypsum as additives improve green waste composting. Author links open overlay panel Wan Yang a b, Zexin Yin a b, Lu Zhang a b. Show more. Add to Mendeley. ... FGDG is a by-product produced from the desulfurization and purification of the flue gas generated by the burning of sulfur-containing materials [23].
Desulfurized gypsum based functional mortar for coating …
[0003] With the vigorous development of my country's construction industry, a large amount of mortar is required for indoor plastering and plastering. Gypsum-based mortar has a certain humidity regulating effect, is not easy to hollow and crack, and has good sound and heat insulation effects. It is a very good building interior Plastering mortar has been widely used in …
Flue Gas Desulfurization Gypsum
The semi-hydrate content of desulfurized gypsum is adjusted as a natural plaster substitute for producing gypsum board, wallboard [107].The modified treatment of desulfurized gypsum with cement, inorganic waste, straw fiber and other wastes can be used to manufacture high-insulation and compression-resistant wall materials [108].Desulfurized gypsum is incorporated into the …
A brief review on flue gas desulfurization gypsum recovery …
Tan et al. studied the process parameters of direct wet mineralization of CO 2 with desulfurized gypsum and established a reaction model of direct wet mineralization of CO 2 with desulfurized gypsum in an ammonia medium system. 60 There is a competition between the CO 2 absorption reaction and NH 2 COO − hydrolysis reaction, in which the CO 2 ...
Optimization design and characterization of slag …
Desulfurization gypsum (DG) is an industrial solid waste obtained by using lime to recover SO 2 gas in flue gas. Its chemical reaction process is shown in equation (1).Due to the limited effective treatment methods, a large amount of DG dumped has an unavoidable negative impact on environment [13].The main chemical composition of DG is CaSO 4 ·2H 2 O, which …
Production and resource utilization of flue gas desulfurized …
Roasted desulfurized gypsum has a good dephosphorization capacity (Cheng et al., 2018). Chang uses FGD gypsum as a carrier to synthesize a solid diamine adsorbent with …
Calcium Sulfite Solids Activated by Iron for Enhancing As(III
Desulfurized gypsum (DG) as a soil modifier imparts it with bulk solid sulfite. The Fe(III)-sulfite process in the liquid phase has shown great potential for the rapid removal of …
High value-added utilization of desulfurized building gypsum …
Desulfurized building gypsum (DBG) has great application potential and can be used to produce lightweight plastering gypsum (LPG). In this work, DBG was modified by adding different proportions of ...
WO2018166220A1
A method for co-producing sulphoaluminate cement and sulfur by using desulfurized gypsum and aluminum ash, comprising: (1) drying aluminum ash, and heating desulfurized gypsum for dehydration to obtain semi-hydrated gypsum; (2) mixing the aluminum ash with the semi-hydrated gypsum according to a preset ratio, pulverizing, and homogenizing; (3) calcining the …
Separation and Purification Technology
The integrating purification process has been widely used for the purification of multi-pollutants in the daily glass industry. With the gradually deep research on the pipeline injection process, …
Summary of research progress on industrial flue gas desulfurization
Through the purification technology of flue gas desulfurization, ultralow emissions of SO 2 flue gas in industrial flue gas can be achieved. This article involves dry desulfurization, semi-dry desulfurization, and wet desulfurization technologies. ... Desulfurized gypsum is incorporated into the slag or mixed with a grinding blast furnace slag ...
CN215539191U
The utility model provides waste gas purification equipment for producing green desulfurization gypsum blocks. The exhaust gas purification equipment for the production of the green desulfurization gypsum block comprises: two support plates; the top plate is fixedly arranged at the tops of the two support plates; the mounting frame is arranged on the outer wall of one …
Influence of Reaction Parameters on Solid Outputs in …
The desulfurized gypsum sample was sourced from a coal-fired power plant. Initially, the samples were dried in an oven at 45°C for 24 hours to eliminate external moisture. After drying, the primary chemical composition of the desulfurized gypsum, as displayed in Table 1, consisted predominantly of CaSO 4 ·2H 2 O at
Utilization of semi-dry sintering flue gas desulfurized ash …
Modifying SSFGDA extends its range of application to materials such as desulfurized gypsum used in architecture products and industrial cement retarders [20], [21]. In China, however, ... Through the purification technology of flue gas desulfurization, ultralow emissions of SO 2 flue gas in industrial flue gas can be achieved. This article ...
Utilization of Desulfurization Gypsum to Producing SO
With emission control becomes more and more stringent, flue gas desulphurization (FGD) is commonly employed for desulfurization. However, the product of …
CN113135585A
The invention discloses a preparation method for reducing the content of organic matters in desulfurized gypsum, which comprises clean water, a first tank, a second tank, a third tank, a centrifugal machine and a waste water pipe; the clean water is connected with the first tank; the second tank is connected with the first tank, the third tank and the centrifuge respectively; the …