phosphogypsum yunnan in Mexico
A systematic review of phosphogypsum recycling industry …
1. Introduction. Phosphogypsum (PG) is the major by-product of the wet phosphoric acid industry (Li et al., 2023), which is primarily composed of calcium sulfate dihydrate, along with some impurities including soluble phosphorus, fluorine, and heavy metals (Ou et al., 2023).Approximately 4–5 tons of PG are generated from the …
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Climate change adaptation and upland rice yield: evidence …
The study aims to examine the impact of farmers' actual adaptations on rice yields in the upland areas of Yunnan province, China.,The paper employs the simultaneous equations model with endogenous switching to investigate the different effects of adaptation strategies on rice yields achieved by adopters and nonadopters based on the cross ...
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Preparation of gypsum with high purity and whiteness from …
Phosphogypsum (PG) is a solid waste product generated during wet-process phosphoric acid production. Various impurities considerably reduce the purity, …
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Harmless treatment technology of phosphogypsum: …
Phosphogypsum (PG) was taken from Yunnan Yuntianhua Co., Ltd., with a moisture content of 18.5%. Lime (L) was purchased from Hunan Baicheng Technology Co., Ltd., with CaO content ≥90%. Calcium carbide slag (CS) was taken from Kunming heat source plant in Yunnan Province, China, which is alkaline solid waste with a moisture …
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Phosphogypsum circular economy considerations: A critical …
This article reviews the physical-chemical properties and environmental impacts of phosphogypsum (PG), a byproduct from phosphate fertilizer production. It …
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Gasification Performance and Mechanism of High-Silicon Phosphogypsum …
The phosphogypsum (PG) stockpile in Yunnan, China, is one of the largest accumulations of PG. Our group has focused on the application of chemical looping gasification (CLG) with a PG oxygen carrier characterized by high silicon content. FactSage 7.1 software was used for the thermodynamic simulation analysis of the reaction …
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Flotation purification of waste high-silica phosphogypsum.
DOI: 10.1016/j.jenvman.2022.115824 Corpus ID: 251339939; Flotation purification of waste high-silica phosphogypsum. @article{Fang2022FlotationPO, title={Flotation purification of waste high-silica phosphogypsum.}, author={Ji Fang and Yingyong Ge and Zhijie Chen and Baolin Xing and Shenxu Bao and Qing Yong and …
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Research on the variations of organics and heavy metals in …
Concentration and fraction distribution of organics and heavy metals in municipal sludge treated by modified phosphogypsum and acetic acid (signed as MPG/HAC) were studied. ... Kunming University of Science and Technology, Kunming, 650500, Yunnan, China. Electronic address: lipingma_kmust@163.
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Phosphogypsum: A Review of the Florida Institute of …
Phosphogypsum disposal was a very simple matter in the early days of the industry. If at all possible, you located your plant near the ocean or on a river and dumped the phosphogypsum into the sea or the river. If you were foolish enough to locate where water disposal was not possible, you suffered the economic penalty of having to stack the ...
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Experimental Study on Pretreatment of Preparing …
the phosphogypsum and citric acid which add as the weight of phosphogypsum in 0.45 ‰, and join the phosphogypsum dosage is 44% of the water in the tap water, stirring with a glass rod, fully in the blender mixing fully, let stand, adding 4 ~ 5 g of quicklime, using a blender mixing, quiet place,
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Highly targeted solidification behavior of hazardous components …
Phosphogypsum(PG) is a typical by-product resulting from the wet production process of phosphoric acid in phosphorus chemical industry and usually takes the form of calcium sulfate dehydrate ... Kunming, Yunnan province, and all PG samples were taken from the middle layer of the landfill. The carbide slug (CS) was taken from …
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Utilization of high-volume phosphogypsum in artificial …
Artificial aggregate is an effective method to recycle for waste phosphogypsum (PG) in large quantity. This article proposes PG-muck artificial aggregates (PMAs) that combine PG and muck using compaction granulation to achieve high-volume utilization of PG. Varied PG and muck contents are applied to prepare …
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A Novel Process to Recover Gypsum from Phosphogypsum
The test samples used in this study were taken from phosphogypsum produced by a phosphorus chemical enterprise in the Deyang Region, Sichuan Province, China. The content of CaSO 4 ·2H 2 O in the phosphogypsum was 80.65%, and the whiteness was 27.68. The water content of the phosphogypsum was less than 5%, …
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Development and Application of Phosphogypsum in …
The hydration of hemihydrate phosphogypsum in the alkaline environment was investigated aiming to recycle phosphogypsum-a promising gypsum resource in gypsum-based materials that generally ...
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Phosphogypsum: potential uses and problems – a …
Phosphogypsum (PG: CaSO 4 ·2H 2 O) is a waste product generated by the phosphate industry. World production of this waste …
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ICL JV YPH | China
ICL's subsidiary in China, YPH, holds two phosphate mining licenses from the Division of Land and Resources of China's Yunnan District. In 2022, YPH was awarded a Green Mine certification from Chinese authorities (ranked AAAAA) for excellence in mine planning, operations and mine remediation. PRODUCTS & RAW MATERIALS kt = THOUSANDS …
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Experimental Study on Pretreatment of Preparing …
The effects of washing method, lime neutralization, flotation method and microwave method of different pretreatment process of Yunnan phosphorus building gypsum strength and crystal morphology. Through, a lot of experiments comparing the four kinds of pretreatment effect, the results show that: after four pretreatment of phosphogypsum are basically …
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Radioactive Material From Fertilizer Production
Phosphogypsum, a waste product from manufacturing fertilizer, emits radon, a radioactive gas. It also contains the radioactive elements uranium, thorium and radium. Phosphate rock mining is the …
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Phosphogypsum
Phosphogypsum is a synthetic gypsum generated during the production of phosphoric acid. Learn about its environmental impact, management, utilization, and research trends …
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Phosphogypsum Resource Utilization Based on …
Kunming University of Science and Technology, Faculty of Environmental Science and Engineering, 650500 Kunming, China. Search for more papers by this author. ... This comprehensive review on thermodynamic analysis in phosphogypsum resource utilization for the mentioned products is valuable for academicians, scientists, and …
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Reuse of phosphogypsum pretreated with water washing as …
Cemented backfill is an effective means to increase ore recovery, improve safety conditions, and reduce surface disposal of solid wastes. As a typical solid waste, phosphogypsum (PG) is the by ...
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Review on high-value utilization of phosphogypsum: …
Review on high-value utilization of phosphogypsum: Utilization of calcium and oxygen resources present in phosphogypusm. Author links open overlay panel Jie Yang a, Senlin Dong a b, ... (No. 52300160, No. 21176108, No. 21666016 and No. 21868014), Sichuan Science and Technology Program (No. 2022 JDRC0101), Yunnan Fundamental …
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Production of phosphate fertilizers in Yunnan, …
Download scientific diagram | Production of phosphate fertilizers in Yunnan, Guizhou, Sichuan and Hubei provinces of China during 2006-2014. from publication: Phosphogypsum production and ...
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Sustainable Utilization of Phosphogypsum in Multi-Solid …
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 economic aspects of sustainability, we investigate the feasibility of employing phosphogypsum as a primary raw material, in …
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Phosphogypsum: Properties and Potential Use in …
acid, 4–5 tons of phosphogypsum are produced (El Issiouy et al. 2013; Papastefanou et al. 2006). Currently, between 3 and 4 billion tons of phosphogypsum have been produced, with an annual rise of 300 million tons (Cuadri et al. 2021). The question of considering phosphogypsum as a waste or a resource has been
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Application of phosphogypsum in soilization: a review
Phosphogypsum is the most significant industrial solid waste in the world. Phosphogypsum has a complex composition and its traditional storage methods occupy large areas of land and also damage the environment. Currently, phosphogypsum is mainly used for the direct preparation of construction materials and chemical auxiliary …
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Nanomaterials | Free Full-Text | The Generation Process, …
As phosphogypsum constitutes a large amount of solid waste material, its purification treatment and comprehensive utilization have close connection with economic development and ecological environmental protection. For the moment, the storage quantity of phosphogypsum is still rising as a result of the increasing phosphate fertilizer …
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Resource utilization and development of phosphogypsum …
1. Introduction. Phosphogypsum (PG) is a bulk industrial solid waste of wet-process phosphoric acid production. Every ton of phosphoric acid production generates as many as 4–6 tons of PG, including more than 90% of CaSO 4 ·2H 2 O, a small amount of phosphorus, fluorine, organic matter, oxides, heavy metals, radioactive substances …
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Deep removal of phosphorus and synchronous preparation …
Fig. 3 shows the FT-IR spectra of the PG sample. In the FT-IR spectra, the presence of water was confirmed by the characteristic transmission bands in the 3750–3250 and 1750–1500 cm −1 regions. The bands in the 1250–1000 and 750–500 cm −1 regions were assigned as v 3 SO 4 2-and v 4 SO 4 2-, respectively [35], [40].The band at 839 …
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Phosphogypsum | Encyclopedia MDPI
Phosphogypsum dumps are located in open areas in close proximity to the enterprise, natural complexes, and even settlements, and occupy vast territories. ... Yunnan, Guizhou, Sichuan, and Anhui ; hence, they these also have large storage sites. Poland also has significant phosphogypsum storage facilities. More than 5 million tons …
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