How Much Is A Ton Of Phosphogypsum In Yunnan

The production of one ton of phosphoric acid generates 4.5 -5.5 t of phosphogypsum (Chuan et al., 2018). For the recovery of metals, the amount of waste will greatly depend on …

the whiteness of phosphogypsum Jiangli Li, Yongjie Guo, Peiqiang Fan, Haibin Li, Ciyun Chen, Shuai Xu, Lingpan Du ... 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)

Appl. Sci. 2023, 13, 12689 2 of 15 materials for the improvement of red clay, with the incorporation of phosphogypsum into red clay being a frequently employed and efficacious technique [8,9].

In general, approximately 5.0 tons of phosphogypsum are generated when producing 1.0 ton of phosphoric acid. At present, the output of phosphogypsum is estimated to be around 280 million tons per year all over the world and more than 22 million tons per year throughout China, and the total generated phosphogypsum has been over 100 million tons ...

According to data from 2021, the top five provinces for phosphate fertilizer production are Hubei, Yunnan, Guizhou, Sichuan, and Anhui, which together account for approximately 89.5 % of …

This is most frequently carried out via the wet process, in which dried phosphate rock is combined with sulfuric acid in a reaction yielding phosphoric acid and calcium sulfate, or phosphogypsum. For every ton of phosphoric acid produced, around 5 tons of phosphogypsum are produced, making this a substantial source of industrial waste ...

calcium sulfate is called phosphogypsum. As a general rule, 4 to 5 Mg ( 4.5 to 5.5 tons) of PG are produced for every ton of phosphoric acid produced (3). In the United States, phosphogypsum is currently being produced at a rate of 54 million Mg (60 million tons) per year. Long-term projections indicate that more than 1.4 billion Mg (1.54

The production of one ton of phosphoric acid generates 4.5 -5.5 t of phosphogypsum (Chuan et al., 2018). For the recovery of metals, the amount of waste will greatly depend on the amount of gangue ...

A second problem is that existing methods of neutralizing impurities in phosphogypsum using water result in increased phosphogypsum humidity. Natural gypsum stone contains (3-5)% moisture and phosphogypsum (30-40)%. This leads to an increase in thermal energy consumption of several times, as evaporation of moisture is a very energy-intensive ...

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 production of phosphoric acid per …

from phosphogypsum Mingxia Du1,3, Jinming Wang1,2,3,4,5*, Faqin Dong1,3, ... tion, which typically produces 5 tons of PG for every 1 ton of phosphoric acid produced. ˜e cumulative global

PDF | On Jan 1, 2015, Chen-Xi Du and others published Experimental Study on Pretreatment of Preparing Phosphorus Building Gypsum with Yunnan Phosphogypsum | Find, read and cite all the research ...

Dust rising above the dumps contains an average of up to 10 g of fluorine per 1 ton of phosphogypsum (dust distribution radius is up to 1.5 km) . Fluoride compounds are highly toxic to the flora. Fluoride compounds are highly toxic to the flora.

Phosphogypsum (PG), a significant by-product of the wet phosphoric acid production process, poses environmental and utilization challenges due to its harmful impurities, including heavy metals ...

The production of one ton of phosphoric acid generates 4.5 -5.5 t of phosphogypsum (Chuan et al., 2018). For the recovery of metals, the amount of waste will greatly depend on the amount of...

provinces in terms of production are Hubei, Yunnan, Guizhou, Sichuan, and Anhui [5]; ... rising above the dumps contains an average of up to 10 g of fluorine per 1 ton of phosphogypsum (dust ...

In Yunnan Province, both Company O and Company R utilize 49.3 × 10 4 t and 113.11 × 10 4 t of PG respectively for waterproof damming materials. Engineering application …

Request PDF | On Jul 1, 2020, Shuhua Liu and others published Application of Lime Neutralised Phosphogypsum in Supersulfated Cement | Find, read and cite all the research you need on ResearchGate

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 ...

where R is the recovery of gypsum (%), Q 1 is the weight of the flotation concentrate (g), G 1 is the calcium sulfate dehydrate of the flotation concentrate, Q 0 is the weight of phosphogypsum (g), and G 0 is the calcium sulfate dehydrate of phosphogypsum (g).. 2.3. Analyses. The whiteness of the gypsum concentrate samples was measured using a WSD-3C whiteness …

Status of phosphogypsum utilization. Natural gypsum (CaSO 4 ·2H 2 O) is a versatile industrial and construction material, which is heavily mined and this resource is being depleted as it is non-renewable. Since the physicochemical and mechanical properties of PG are similar to those of natural gypsum (Moalla et al. 2018), it has attracted much attention as a …

phosphogypsum deposits, which amount to 15.2 million tonnes in Rivne region [2], and 421.11 tons of phosphogypsum has accumulated in Vinnitsa region of Ukraine [3]. ... provinces in terms of production are Hubei, Yunnan, Guizhou, Sichuan, and Anhui [5]; hence, they these also have large storage sites. ... rising above the dumps contains an ...

Add Water to phosphogypsum as the weight of phosphogypsum in 35%,and add 3 ~ 4 g of quicklime, using a blender mixing, quiet place, until the liquid is neutral. Microwave Method. Put the phosphogypsum in the microwave oven to microwave.Then, mix the phosphogypsum and citric acid which add as the weight of phosphogypsum in 0.45 ‰, and join

During dry storage (without pre-neutralization), an average of 0.1% fluorine is released into the gas phase in terms of dry matter contained in phosphogypsum. Dust rising above the dumps contains an average of up to 10 g of fluorine per …

Approximately 4–6 tons of PG are generated per ton of phosphoric acid produced [2].Studies have shown that 200–300 million tons of PG are produced worldwide each year [3].The annual growth rate of PG in China exceeds 70 million tons [4], [5].The main component of PG is CaSO 4 ·2H 2 O. There are some polluting impurities in PG, such as dissolved …

Phosphogypsum (PG) is an industrial by-product produced in the process of wet phosphoric acid production [1].Every 1 ton of phosphoric acid produced generates 5 tons of PG by-products [2].In China, phosphogypsum is mainly distributed in Yunnan, Guizhou, and Hubei provinces, roughly 75Mts of PG were deserted in 2019, and the weight of the piled-up inventory exceeds 400 Mts …

These emissions are concentrated mainly in the mid- and upstream regions of the Hubei, Sichuan, Guizhou, and Yunnan provinces, which account for 76.4% of the TP …

provinces in terms of production are Hubei, Yunnan, Guizhou, Sichuan, and Anhui [5]; ... rising above the dumps contains an average of up to 10 g of fluorine per 1 ton of phosphogypsum (dust ...

) and phosphogypsum in China during 2000-2015. a Some data were cited from references of [9-13]. 3. Distribution of phosphogypsum in China In 2014, total phosphate fertilizers (as P 2 O 5) production in China was 17.09 Mt. The aggregate production in Yunnan, Guizhou, Sichuan and Hubei provinces was 12.53 Mt, accounting for 73.3% of

2.2. Phosphogypsum Recycling in Agriculture. Phosphogypsum contains residues of phosphate, phosphoric acid (up to 4%, including water-soluble form up to 1.5%), sesquioxide, silicon compounds, rare-earth elements trace contaminants as impurities [60]. Consequently, phosphogypsum is an ameliorant and a multicomponent fertilizer [61].