No. 1688, Gaoke East Road, Pudong new district, Shanghai, China.
No. 1688, Gaoke East Road, Pudong new district, Shanghai, China.
This research aims to study the utilization of waste from power plants, construction and demolition, and agriculture by varying the ratios of flue-gas desulfurization (FGD) gypsum, construction and demolition waste (CDW), …
The technology is to grind lime-limestone into powder through a desulfurized gypsum mill, and then configure it into a slurry, so that the SO2-containing flue gas after dust removal is passed through a slurry scrubber to remove SO2. ... The crushed small pieces of material are sent to the storage hopper through the elevator,and then sent to the ...
Gypsum comes in many different forms e.g., the gypsum used in soils is typically natural gypsum, which is mined or quarried (calcium sulfate dihydrate in dry powder form containing 80-98% product ...
Newly developed carbonation technology toward CaCO 3 preparation also reveals a significant utilization way to recover high-value products from waste gypsum, whereas there is a shortage …
In this sense, silage (SG) and flue gas desulfurized gypsum (FGDG) are two good choices as composting additives. SG is made from the roughage obtained by cutting corn, ... Optimum mass percentage of microencapsulated PCM mixed with gypsum for improved latent heat storage. J. Energy Storage, 33 (2021), Article 101910, 10.1016/j.est.2020.101910.
Flue gas desulfurization gypsum (FGDG) is an industrial by-product generated during the flue gas desulfurization process in coal-fired power plants. Due to its abundance, chemical and …
The utilization of desulfurized building gypsum as raw material for gypsum-based self-leveling mortar (GSL) is limited by its low strength and poor water resistance. The objective of this study is to enhance comprehensive properties of GSL and prepare qualified desulfurized building gypsum-based self-leveling mortar that can be effectively applied in practical …
Desulfurized gypsum, a by-product of thermal power plants for removal of sulfur from coal, may be used as an external source of Ca2 + for reclamation of saline-sodic soil in this plain because it ...
Gypsum deposits were formed during the Paleozoic Era, approximately 600 million years ago, when most of the Earth's surface was covered by salt water. Gypsum is composed of 79.1% calcium sulfate and 20.9% water (by weight). It is a nonmetallic mineral, one of the most abundant in the world, and is found in rock form.
Three batches of desulfurized gypsum with different chloride ion content were used to prepare gypsum board. According to JC/T 2074-2011 "Flue Gas Desulfurization Gypsum", the chloride ion contents in
In 2020, global FGD-gypsum production is expected to reach 255 million tons, with Asia accounting for 55%, followed by Europe (22%), North America (18%), and the rest of the world (5%).
Desulfurized gypsum is sent to the gypsum storage bin for storage after concentration and dehydration, and can be sold for reuse. The fog drops of the flue gas after desulfurization are removed by the demister, and discharged from the chimney after passing through the heat exchanger. See Fig. 8 for the process flow chart.
This material is known as FGD (flue gas desulfurized) gypsum and is being marketed as Gypsoil TM. Gypsum or calcium sulfate dihydrate (CaSO 4 ·2H 2 O) in its purest form has 23 % Ca and 18 % S, although most agricultural sources have slightly lower analyses. Calcium fertilization is unnecessary for field crops grown on Wisconsin soils.
Flue gas desulfurized gypsum (FGD gypsum), mainly originates from thermal power plants, smelters, and large-scale enterprise boilers. This article reviews the production in China and the latest ...
Research on the method of improving the influence of chloride ion on the performance of desulfurized gypsum products [J]. New building materials. 2014, 11: 41-45.
Flue Gas Desulphurized Gypsum (FGDG) is a by-product generated by the thermal power industry to remove sulfur dioxide (SO 2) from flue gas emissions. This paper …
This work innovatively combines the advantages of desulfurized gypsum and carbide slag to fabricate the skeleton material. By regulating the ratio of desulfurization gypsum and carbide slag, a skeleton material with excellent heat storage capacity, compressive strength, energy saving, and low carbon content can be obtained.
Desulfurized ash contains about 21.33% hemihydrate calcium sulfite, 18.11% calcium carbonate, 28.55% dihydrate gypsum, 25.81% calcium hydroxide, 1.85% calcium oxide. Particle size distributions of hemi-hydrate gypsum and desulfurized ash are given in Fig. 1 A. The specific surface areas of desulfurized ash and hemihydrate gypsum are 351 and
The desulfurized gypsum application rates varied between 0 and 50 t·hm-2 across six treatment levels, based on the soil Na + and Mg 2+ exchange capacity. ... Additionally, soil organic carbon storage peaked at an application rate of 40 t·hm-2, exhibiting a 0. 029 kg·m-2 increase over the control.
In the limestone gypsum flue gas desulfurization process, 2.7 ton of desulfurized gypsum can be generated for each 1 ton of SO 2 removed . A 300 MW coal-fired thermal power unit discharges about 30,000 ton of desulfurized gypsum every year (assuming 1.0% sulfur in coal) . A substantial amount of desulfurized gypsum is generated as a by-product ...
The Portland cement-fly ash-desulfurized gypsum composite solidifier brings the dredged soil to have higher ... The disposal method of piling up and storage results in the occupation of land resources, with great ... Properties and environmental impact of building foundation pit backfilling materials containing iron and steel solid waste ...
of Bayer RM in cementitious materials. Considering this, desulfurized gypsum (DG) was selected as a sulfate activator in this paper. Desulfurized gypsum is an industrial byproduct produced by thermal power plants (Han et al., 2016). It is acidic and can pollute the soil and water (Panda et al., 2017), and its main component is gypsum dihydrate ...
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 …
The results show that adding desulfurized gypsum, which accounts for 6% to 8% of the total mass of the cementitious material, has no adverse effect on the workability and can significantly improve ...
In their review of gypsum use in agriculture, Zoca and Penn (2017) found that pH could increase or decrease following gypsum application but that changes were usually small (0.2-0.3 units).
Abstract. As a relatively fast-setting building material, desulfurized gypsum is difficult to use. Citric acid, sodium gluconate, and sodium tripolyphosphate were used to design and prepare a desulfurized gypsum paste containing single or combined retarders. The effects of the retarder type and content on the setting inhibition and mechanical properties of desulfurized …
The desulfurized gypsum not only has a high content of gypsum (> 900 g kg − 1) but also has a low price < 50¥ t − 1. We therefore conducted a study to determine how effective desulfurized gypsum is at reducing sodicity, improving the physical and chemical properties of the soil, and improving the growth and yield of rice in these saline ...
The rapid expansion of coal-fired power plants has led to a significant increase in the production of flue gas desulfurization (FGD) gypsum, a byproduct of sulfur dioxide emission control processes [1], [2].With annual global output reaching millions of tons, FGD gypsum poses substantial environmental challenges due to its large-scale accumulation and potential …
With its high purity level and lower cost compared to natural gypsum, FGD gypsum is a viable alternative that can transform the construction industry. This paper also discusses …
This work aimed to investigate the feasibility of utilizing the low-quality desulfurization ash from semi-dry flue gas desulfurization by mixing with α-hemihydrate gypsum, and then the environmental issues resulted from low-quality desulfurized ash from semi-dry flue gas desulfurization can be resolved, and both economic and ecological benefits are brought to …
