Firstly, the pH value of phosphogypsum in a phosphogypsum yard in Yunnan was tested. Phosphogypsum with a pH range of around 2 ∼ 3 was selected. After the test was completed, a grinder was used to grind the phosphogypsum to a particle size of 20–30 μm. Subsequently, phosphogypsum, sodium bicarbonate, cement, fly ash, and polyacrylamide ...
WhatsApp: +86 18221755073
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 ...
WhatsApp: +86 18221755073
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 yunnan. In ...
WhatsApp: +86 18221755073
Phosphogypsum (PG) is a by-product of solid waste produced by the phosphate chemical industry. Owing to large emissions and massive storage issues, it causes a potential …
WhatsApp: +86 18221755073
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 materials, but the …
WhatsApp: +86 18221755073
As a typical solid waste, phosphogypsum (PG) is the by-product generated during the exploitation of phosphate resources 1,2,3. Global production of PG is estimated to be around 100–280 Mt ...
WhatsApp: +86 18221755073
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 national ...
WhatsApp: +86 18221755073
China also has significant production of phosphogypsum, and the five largest provinces in terms of production are Hubei, Yunnan, Guizhou, Sichuan, and Anhui [5]; hence, they these also have large ...
WhatsApp: +86 18221755073
Phosphogypsum Recycling: A Review of Environmental Issues, ... provinces in terms of production are Hubei, Yunnan, Guizhou, Sichuan, and Anhui [5]; hence, they these also have large storage sites. ...
WhatsApp: +86 18221755073
This paper studied effect of different pretreatment process on Yunnan phosphorus building gypsum strength and crystal morphology such as washing method, lime neutralization …
WhatsApp: +86 18221755073
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 Ruan Chi and Siyuan Yang and Bing‐Jie Ni}, …
WhatsApp: +86 18221755073
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. …
WhatsApp: +86 18221755073
In this study, phosphogypsum (PG) is simulated by doping fluorine and phosphorus ions in an analytically pure reagent of gypsum dihydrate. The influence of fluorine and phosphorus impurity and content on the dehydration reaction process of phosphogypsum and its crystalline micromorphology is assessed during the preparation of α-type gypsum hemihydrate …
WhatsApp: +86 18221755073
Experimental Study on Phosphogypsum Desilication by Flotation[J]. Multipurpose Utilization of Mineral Resources, 2014, (6): 39-42. doi: 10.3969/j.issn.1000-6532.2014.06.010. Zhu Pengcheng, Wang Guodong, Zeng Bo. Experimental …
WhatsApp: +86 18221755073
Phosphogypsum (PG) is a by-product produced during the wet process of phosphoric acid (H3PO4) production from natural phosphate rocks. Approximately 4–6 tons of PG is produced per ton of phosphoric acid production, where worldwide PG generation exceeds 300 million tons annually. The vast majority of produced PG is discarded irresponsibly, leading to …
WhatsApp: +86 18221755073
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
WhatsApp: +86 18221755073
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 .
WhatsApp: +86 18221755073
Phosphogypsum (PG), a byproduct during the phosphoric acid production process, also known as the wet process, contains complex and diverse impurities, resulting in low utilization and considerable accumulation. This leads to a massive waste of land resources and a series of environmental pollution problems. Given the current urgent ecological and …
WhatsApp: +86 18221755073
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
WhatsApp: +86 18221755073
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 the global market. Surface disposal …
WhatsApp: +86 18221755073
Phosphogypsum-based Preparation of Building Gypsum Powder. To prepare a large amount of phosphorus building gypsum powder (Zhenhuan et al. 2021), a certain amount of phosphorus …
WhatsApp: +86 18221755073
Chemical looping gasification of phosphogypsum as an oxygen carrier: The Ca and S migration mechanism using the DFT method Sci Total Environ. ... Kunming, Yunnan 650093, China. 2 Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650093, China. Electronic address: …
WhatsApp: +86 18221755073
Addressing both environmental and economic aspects of sustainability, we investigate the feasibility of employing phosphogypsum as a primary raw material, in collaboration with various solid waste components, …
WhatsApp: +86 18221755073
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. And the new method improved the traditional 3 kinds of processing methods. After processing of phosphogypsum, strength and crystal morphology were compared to shown …
WhatsApp: +86 18221755073
Phosphogypsum was from the phosphogypsum storage yard of Yunnan Yuntianhua Co., Ltd. It was a light-yellow powder, and its chemical composition is shown in Table 1. Dehydration of phosphogypsum was performed in a constant-temperature blast oven at 160°C for 4 h to prepare PBG.
WhatsApp: +86 18221755073
This paper summarizes the generation process, impurity removal treatment (physical method, chemical method, heat method), high-value utilization (nanometer calcium sulfate whisker, nanometer calcium carbonate) of …
WhatsApp: +86 18221755073
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
WhatsApp: +86 18221755073
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 ...
WhatsApp: +86 18221755073
Phosphogypsum is a solid industry by-product generated when sulphuric acid is used to process phosphate ore into fertiliser. Phosphogypsum stacks without pretreatment are often piled on the land surface or dumped in the sea, causing significant environmental damage.
WhatsApp: +86 18221755073
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 …
WhatsApp: +86 18221755073
0086-21-58386256
Our office time Mon - Sat 10.00AM - 7.00PM Sunday CLOSED
Copyright © 2024.Con All rights reserved.sitemap