Phosphogypsum (PG) is a radioactive industrial by-product produced in large quantities when processing phosphate ores into fertilizers. With rapid growth of high concentration phosphate …
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Phosphogypsum (PG) is a byproduct generated in large quantities by the phosphate industry, and it serves as a significant source of total phosphorus (TP) pollution along the Yangtze River. Environmentally sound management of PG has, therefore, become a critical challenge. This review outlines the generation processes and environmental risks associated with PG in China.
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650600, Yunnan, PR China 2 Yunnan Phosphate Chemical Group Co. Ltd, Phosphate Resources Engineering Research Branch, Kunming 650113, China Corresponding author: 444565847@qq (Yongjie Guo) Abstract: Every year, the production of industrial phosphoric acid generates more than 100 Tg of
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Production of sulfuric acid co-production cement At high temperatures, PG undergoes reductive decomposition in the presence of coke, yielding sulfuric acid as the main …
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utilizationrate.Notably,fiveprovinces—Hubei,Yunnan,Guizhou, Sichuan, and Anhui—account for approximately 85% of the ... At present, the production of cement retarders from PG remains the primary method for large-scale PG consumption. Ecological concrete, also known as"vegetative concrete," is an ... phosphogypsum in concrete, recycling ...
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This paper offers a comprehensive overview of the current status of phosphogypsum production, utilization, and associated pollution in China, with a particular …
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The sample of PG used in the study was obtained from a phosphate fertilizer plant in Yunnan, China. ... For CSA cement production, ... Treating waste phosphogypsum for cement and plaster manufacture. Cem Concr Res, 32 (7) (2002), pp. 1033-1038.
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This study contributes to sustainable construction practices by exploring the use of phosphogypsum, a commonly discarded byproduct, in the production of recycled aggregates. Addressing both environmental and …
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The phosphogypsum sample used in this study was bought from Yunnan Natural Gas and Chemical Engineering Company. After drying at 105 °C for 24 h, the chemical analysis was presented in Table 1 and the size range of the phosphogypsum sample was smaller than 0.074 mm. SEM analysis of the phosphogypsum sample was shown in Fig. 1, from which it is …
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Phosphogypsum (PG) is a radioactive industrial by-product produced in large quantities when processing phosphate ores into fertilizers. With rapid growth of high concentration phosphate and...
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Cement Lime Leca Lithium Magnesium Coal Zinc Oxide Granulator Grinding Waste ... China•Yunnan•Kunming. Construction unit: Sinochem Yunlong Co., Ltd. ... Production scale: phosphogypsum production line with an annual processing capacity of 300,000 tons. Service scope: one-stop technical services such as experimental research and development ...
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Phosphogypsum (PG) is a type of synthetic gypsum generated during the production of phosphoric acid. Each ton of phosphoric acid generates 5 tons of p…
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Phosphogypsum (PG) is a solid byproduct generated from wet-process phosphoric acid production in the phosphorus fertilizer industry. About 4 ∼ 5 tons of PG are produced for every ton (P 2 O 5) of product acid. [1], [2], [3].World PG production is variously estimated to be around 100–280 Mt per year [4], [5], [6], [7].However, only 15% of world PG production is …
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Strong efforts have been made in the comprehensive utilization of phosphogypsum. Such as using phosphogypsum as set retarder in Portland cement [8], soil stabilization [9], phosphogypsum plates [10], anhydrite cement [11], lime–fly ash–phosphogypsum binder [12], high-strength gypsum [13], calcium sulfate whiskers [14], hollow blocks [15], cementitious …
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The results reveal notable benefits for all three utilization technologies, with sulfuric acid co-production cement (PSC) offering the greatest environmental advantages and β …
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The PBG cement was prepared using phosphogypsum waste, and the 28-day compressive strength of the cement can exceed 60 MPa. ... and crystal form improvers added during the production process. In addition, the particle size distribution of HPG is shown in Fig. 2. Industrial grade slag, FA, and SM were used, and details of the specific components ...
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The optimal cement ratio is phosphogypsum 25%, titanium slag 60%, clinker 13%, sodium silicate 2%, and the compressive strength reaches 42.1 MPa. Basalt fiber can significantly improve the …
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Incorporation of phosphogypsum with cement in rigid … Most of the phosphogypsum used in the production of Fig. 2 came from the RSA Mart Kanpur in the Indian state of Uttar Pradesh. RSA Mart's Phosphogypsum is available in an off-white hue. Phosphogypsum (Phosphate of Gypsum) powder is white and has a specific gravity of 2.3 % to 2.6 %.
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Phosphogypsum is a by-product of phosphoric acid industrial production, and its stacking volume is increasing year by year, which brings a great threat to the environment and agricultural safety. The way of comprehensive utilization of phosphogypsum was described, and the mechanism of phosphogypsum producing cement, preparing ammonium sulfate, potassium sulfate and …
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The application of phosphogypsum in the fields of cement retarder, building materials, agriculture, the production of sulfuric acid co-production cement, soil improver, storage and backfill treatment were comprehensively summarized.
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Phosphogypsum (PG) is a major by-product of the wet process used to produce phosphoric acid, with approximately five tons of PG generated for every ton of phosphoric acid produced (Meskini et al., 2021).Currently, the cumulative stockpile exceeds 500 million tons in China (Zhou et al., 2021), posing potential risks to the environment and human health.
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Phosphorus chemical companies in China are primarily clustered within phosphorus-rich provinces like Sichuan, Hubei, Guizhou, and Yunnan, with an annual production of 75 × 10 6 t of PG in 2020 (Cui et al., 2022b). Under the combined pressures of ecological environmental preservation and rising economic costs, the structure of PG recycling industry in …
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The main component of phosphogypsum is calcium sulfate dihydrate (CaSO 4. 2H 2 O). The existence of bond water of phosphogypsum leads to multiple ways of resource utilization (Gonfiantini and Fontes, 1963; Palacio et al., 2014; Cole and Lancucki, 1972).CaSO 4. 2H 2 O is an environmentally friendly saturated structure. Phosphogypsum is a solid by-product …
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Phosphogypsum (PG) is an industrial waste from the production of phosphoric acid.The impurities in PG limit its utilization in building materials, and make PG decompose easily at high temperatures. Calcium sulphoaluminate (CSA) cements are insensitive to the presence of impurities and show some desirable performance. The aim of this paper is to study the …
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PDF | On Jan 16, 2016, Hongqi Huang published New common integration process for cement grinding of producing sulfuric acid and cement from phosphogypsum | Find, read and cite all the research you ...
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Phosphogypsum production in China is highly concentrated in the Yangtze River Basin, primarily in Hubei, Yunnan, and Guizhou provinces, which are rich in phosphate ore resources and serve as central hubs for the phosphorus chemical industry. The main pollutants in phosphogypsum include fluoride and total phosphorus, making its management and utilization …
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Production scale: phosphogypsum production line with an annual processing capacity of 300,000 tons Service scope: one-stop technical services such as experimental research and development, process design of electrical automation control system, equipment supply, equipment installation and commissioning, after-sales training, etc.
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In recent years, many scholars had put forward a new idea in which the New Suspension Preheater Cement Production Technique (or NSP) would be used to decompose phosphogypsum to produce vil and ce...
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Phosphogypsum (PG) is an industrial hazardous waste product discharged during wet-process phosphoric acid production. Once crystallized, the byproduct PG is filtered and separated from the liquid-phase product and sluiced to the disposal area near the production site for storage, seriously threatening the harmonious symbiosis between humans and nature. Therefore, …
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In recent years, with the implementation of the phosphogypsum "production by use" policy, represented by Guizhou Province, from the reduction of incremental and stockpile reduction, all-round phosphogypsum consumption, to accelerate the comprehensive utilization of phosphogypsum has put forward new requirements. ... Cement: Yunnan Huaxin ...
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Eco - concrete made with phosphogypsum-based super sulfated cement Nguyen Ngoc Lam-Effect of curing temperature and particle size distribution on unconfined ... production in Yunnan, Guizhou, Sichuan and Hubei provinces was 12.53 Mt, accounting for 73.3% of the total production. The production in these provinces increased by 3.2% compared to ...
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Phosphogypsum, a solid waste produced in the wet phosphoric acid process, can lead to severe environmental pollution. Recently, the resource utilization of phosphogypsum as a raw material for cement retarders and other products has received widespread attention, but it is limited by the high cost of purifying impurities, such as phosphorus and fluorine, contained in …
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1. Phosphogypsum: Phosphogypsum from a chemical plant in Yunnan, the analyt-ical results are shown in Table 16.1. 2. Cement: Yunnan Huaxin PC425 cement, standard curing 7d compressive strength of 30.8 MPa, standard curing 28d compressive strength …
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Research progress on phosphogypsum production and emission and resource utilization. Yunnan Chemical Industry, 2022, 49(12): 4-8. ... [19] Du Tingting, Li Zhiqing, Zhou Yingxin. Research on cement phosphogypsum stabilizing materials used in pavement base. Highway, 2018, 63(2): 189-195. [20] Zhou Mingkai, Zhang Xiaoqiao, Chen Xiao. Study on the ...
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