Phosphogypsum Yunnan

Radioactive Material From Fertilizer Production | US EPA

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 fifth largest mining industry in the United States in terms of the amount of material mined. The phosphate industry is concentrated in the …

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Role of polyacrylamide in the removal of soluble phosphorus …

Phosphogypsum, an industrial solid waste produced in wet phosphoric acid production, is difficult to be utilized due to the harmful impurities such as phosphorus and fluorine. In this study, lime neutralization process was introduced to remove soluble phosphorus and soluble fluorine from phosphogypsum in presence of polyacrylamide. …

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Using Origin Software to Study Silicon Effect on Yunnan …

Yunnan building phosphogypsum strength as a whole higher than that in the blank control group, this was because, silicone as a deing agent was added to the phosphogypsum that reduced the

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Reuse of phosphogypsum pretreated with water washing as …

Phosphogypsum (PG) is reused as aggregate in the cemented backfill, which effectively improves the PG reutilization efficiency. However, the massive …

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On Pretreatment Experimental Study of Yunnan Phosphorus …

Utilizing phosphogypsum in the production of phosphogypsum-based construction materials and its application in the construction industry is a crucial approach to address the resource utilization ...

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Experimental Study on Pretreatment of Preparing …

The needs of phosphogypsum for experiments are all from Yunnan Da Huanglin company that annually product phosphogypsum about 4 ~ 5 million tons. Phosphogypsum is a by-product of phosphorus industry, containing phosphorus, fluorine and

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Phosphogypsum production and utilization in China

Phosphogypsum (PG) is a radioactive industrial by-product produced in large quantities when processing phosphate ores into fertilizers. With rapid growth of high …

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Study on parching procedure

Phosphogypsum of Yunnan Yuntianhua limited liability company. Original whiteness 32.8 %, analysis of the main chemical components shown in Table 1. Table 1 Phosphogypsum component

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On Pretreatment Experimental Study of Yunnan Phosphorus …

This paper studied effect of different pretreatment process on Yunnan phosphorus building gypsum strength and crystal morphology such as washing …

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Phosphogypsum | US EPA

Phosphogypsum is a solid waste byproduct from processing phosphate ore to make phosphoric acid that is later used in fertilizer. Phosphogypsum contains radium, which decays to form radon gas. Both radium and radon are radioactive and can cause cancer. The Clean Air Act regulations require that phosphogypsum be managed in …

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Study on Pretreatment of Phosphogypsum and Preparation …

Phosphogypsum has poor cementitious activity, which hinders its large consumption in the field of building materials. By studying the phase and microstructure of phosphogypsum pretreated by alkali activation, and the compressive strength, and microstructure of the non-sintering building materials prepared with the high content …

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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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Experimental Study on Pretreatment of Preparing …

Phosphogypsum (PG) is a by-product of solid waste produced by the phosphate chemical industry. Owing to large emissions and massive storage issues, it …

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Reductive decomposition of phosphogypsum with high-sulfur-concentration

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 …

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Geochemical and mineralogical characterization of phosphogypsum …

Phosphoric acid manufacturing generates large amounts of phosphogypsum (PG); a by-product generally disposed in the surface or evacuated in the seawater without any pretreatment. Phosphogypsum may host non-negligible amounts of valuable elements such as rare earth elements (REEs), which are critical elements on …

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Microstructure and Key Properties of Phosphogypsum-Red …

Phosphogypsum is a solid powder that was taken from Kunming City in Yunnan Province. It has a water content of 15–20% and a pH of 4.2. The phosphogypsum was dried to constant weight in an oven at 50 °C before the experiment. The specific surface area was determined to be 180 m 2 /kg by the Blaine method .

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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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Research on the Performance of Phosphorus Building …

An enterprise in Yunnan is the largest high concentration phosphate compound fertiliser producer in China, with an annual production of about 2.3 million tonnes of phosphoric acid ( P 2 O 5) and 13 million tonnes of phosphogypsum (dry basis), and a comprehensive utilisation rate of about 26% in 2022, which is still far from the …

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Research on the Performance of Phosphorus Building …

An enterprise in Yunnan is the largest high concentration phosphate compound fertiliser producer in China, with an annual production of about 2.3 million …

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A novel method for purification of phosphogypsum

When phosphorous chemical enterprises adopt wet process to produce phosphoric acid, a large amount of solid waste phosphogypsum (PG) will be produced (Wu et al. 2022a;Mishra et al. 2010;Silva et ...

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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. ... Y. Feasibility study on the application of microwave technology in the purification process of phosphogypsum in …

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Properties, Purification, and Applications of Phosphogypsum: …

Phosphogypsum (PG) is a by-product produced during the wet process of phosphoric acid (H3PO4) production from natural phosphate rocks. Approximately 4–6 …

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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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Sustainable Utilization of Phosphogypsum in Multi-Solid …

As the world's largest producer of phosphate fertilizer and the largest producer of phosphogypsum byproducts, in particular, places like Yunnan, Guizhou, Sichuan, and Hubei have more concentrated deposits. According to statistics, the current stockpile of phosphogypsum has exceeded 830 million tons, and the annual increase …

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On Pretreatment Experimental Study of High Strength Gypsum by Yunnan

This thesis mainly studies the preprocessing of making high strength gypsum powder by using phosphogypsum. And bring out the new preprocessing of phosphogypsum from the traditional methods.

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Flotation purification of waste high-silica phosphogypsum

In this study, the raw waste phosphogypsum (raw PG) was obtained from Yunnan Xiangfeng Industrial Group, Yunnan, China. Before the tests, raw PG was dried at 45 °C in a drying cabinet. The X-ray fluorescence spectrometer (XRF; Axios advanced, PANalytical B.V, Netherlands) was used to analyze the chemical composition of the raw …

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Feasibility analysis for decomposition of phosphogypsum in …

Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650093, People's Republic of China. Search for more papers by this author. ... In this article, combining the characteristic of precalciner in NSP technique and the thermal analysis for phosphogypsum, the adaptability of …

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Preparation of gypsum with high purity and whiteness from phosphogypsum …

Phosphogypsum (PG) is a solid waste product generated during wet-process phosphoric acid production. Various impurities considerably reduce the purity, whiteness, and application range of PG. This ...

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A flotation combined extraction process for improving …

phosphogypsum by direct extraction. which would guide the resource utilization of high-silica phosphogypsum. 2.1. Materials The PG sample was obtained from Phosphorus Chemical Industry Co., Ltd., Yunnan Province, China. The chemical composition analysis results of the PG sample are presented in Table 1. The results

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Effects of phosphogypsum on enzyme activity and microbial …

Phosphogypsum (PG) is a solid waste produced from decomposition of phosphate rock in sulfuric acid. It can improve the physicochemical properties of soil. However, the application of PG will ...

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رقم 1688 ، طريق Gaoke شرق ، حي بودونغ الجديد ، شنغهاي ، الصين.

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