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Metal (loid)s are commonly not released during sieving, crushing, and washing with water of near neutral pH (Cánovas et al., 2018). Contrary to the treatment …

LIU Meng,WANG Qing,ZHU Chen, et al. Performance Change and Application of Calcined Phosphogypsum Before and After Washing and Grinding Pre-treatment[J]. Materials Reports, 2022, 36(Z1): 22020111-5.

Phosphogypsum (PG) is an acid by-product from the production phosphate fertilizers that is produced in large amounts all over the world. However, it is challenging to reuse this waste due to the quantities of various impurities in PG and technical restrictions, resulting in PG accumulation, which threatens adjacent environments.

Phosphogypsum (PG) is the primary byproduct generated during the production of phosphoric acid, an intermediate product in phosphate fertilizer production, …

Phosphogypsum (PG) is a byproduct of the phosphate fertilizer industry that can be used in cement mortar. However, PG mortar is known to have high water absorption. ... N. Wang, and X. Zheng. 2019. "Fabrication of superhydrophobic green surfaces with good self-cleaning, chemical stability and anti-corrosion properties." J. …

The accumulation of original phosphogypsum (OPG) has occupied considerable land resources, which have induced significant environmental problems worldwide. The OPG-based cemented paste backfill (OCPB) has been introduced as a promising solution. In this study, a water-washing pre-treatment was used …

The washing conditions are based on the most economical principle of the water demand determined by the above tests (the optimal washing S/L ratio of 1:0.5 and washing time of 5 min). In addition, PG-4 and PG-5 with an initial pH of 3.52 and 4.99 were selected as control groups.

Phosphogypsum (PG) is the chemical gypsum or by-product generated during the processing of phosphate ores (fluorapatite, Ca 5 ... Their methods consisted of washing 500 g of PG with 25 or 60 g/L saline Na 2 CO 3 solutions (S:L = 1:200) resulting in approximately 81% and 84% increased rates of enrichment, respectively.

Phosphogypsum contains calcium sulfate dehydrate as the main mineral, with small amounts of brushite, quartz, muscovite, and zoisite. Harmful elements, such as silicon, phosphorus, and ... one scavenging, and two cleaning operations, from −0.15 mm to +0.025 mm. The test results show that a gypsum concentrate with a CaSO 4 ·2H 2 O …

In Situ Remediation of Phosphogypsum with Water-Washing Pre-Treatment Using Cemented Paste Backfill: Rheology Behavior and Damage Evolution

The problem of recycling and storage of phosphogypsum is topical for many countries around the world, as it is associated with environmental problems of pollution of water bodies, land, and ...

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 …

In Situ Remediation of Phosphogypsum with Water-Washing Pre-Treatment Using Cemented Paste Backfill: Rheology Behavior and Damage Evolution November 2021 Materials

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 …

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 …

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 …

The phosphoric acid production in Morocco generates a large amount of phosphogypsum (PG) which is a significant source of environmental contamination. In this work, PG has been characterized by different analysis techniques that allow to study the effect of the impurities on its physical and chemical properties. Thus, a method to purify …

A new building filling materials (NBFM) using phosphogypsum and municipal solid waste incineration (MSWI) fly ash is prepared in this paper. The effects of MSWI fly ash dosage and MSWI fly ash ...

The physical methods for PG pretreatment can be classified as washing, flotation and screening. ... Su Z., Huang Z.D. Utilisation of water-washing pre-treated phosphogypsum for cemented paste backfill. Minerals. 2019; 9 (3):19. [Google Scholar] Liu S.H., Fang P.P., Ren J., Li S.F. Application of lime neutralised phosphogypsum in …

Phosphogypsum (PG) waste is a by-product generated from wet-process phosphoric acid (H3PO4) manufacturing during phosphate rock decomposition. …

Phosphogypsum is a by-product of the wet phosphoric acid production. In this study, chemical compositions of phosphogypsum waste (PG) in Hai Phong diammonium phosphate plant (DAP1) and Lao Cai diammonium phosphate plant (DAP2) in Viet Nam were surveyed for the purpose of gypsum recovery by P2O5, F removal to meet …

Phosphogypsum (PG) wastes, including solid-state PG and liquid-state PG leachate, are industrial byproducts generated during the production of phosphoric acid. It is of great concern due to the large-scale product accumulation and environmental and geological hazards. Harmless treatment and green chemical resource utilization …

Recycling phosphogypsum (PG) for cemented paste backfill (CPB) has been widely used at phosphate mines in China. However, the impurities in PG prolong the setting time and reduce the uniaxial compressive strength (UCS), limiting the engineering application of PG. This paper aims to investigate the feasibility of treated PG (TPG) …

The washed phosphogypsum (PGW) was obtained by washing the PGF; this was placed in a large sieve and washed several times until the wash water obtained a neutral pH (between 6.7 and 7). The PGW was left to dry in the open air for 7 days. The dried PGW was ground by a mechanical grinder equipped with an 0.5 mm sieve to …

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

Phosphogypsum (PG) wastes, including solid-state PG and liquid-state PG leachate, are industrial byproducts generated during the production of phosphoric acid. It is of great concern due to the large-scale product accumulation and environmental and …

In this study, we investigated a coarse phosphogypsum containing 49.63% SO3, 41.41% CaO, 10.68%, 4.47% SiO2, 1.28% P2O5, 0.11% F, CaSO4·2H2O purity of 80.65%, and whiteness of 27.68. Phosphogypsum contains calcium sulfate dehydrate as the main mineral, with small amounts of brushite, quartz, muscovite, and zoisite. Harmful …

The washing conditions are based on the most economical principle of the water demand determined by the above tests (the optimal washing S/L ratio of 1:0.5 …

The accumulation of original phosphogypsum (OPG) has occupied considerable land resources, which have induced significant environmental problems …