Phosphogypsum flotation

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Phosphogypsum flotation Description

  • US3951675A - Method for the treatment of phosphogypsum ...

    The purification of the raw phosphogypsum issued from the fabrication of phosphoric acid by reaction between phosphate rock and sulphuric acid consists of removing the extreme grain size fractions therefrom. This method has been developed after it has been found that a large part of the undesirable impurities are concentrated in the extreme grain fractions which constitute only a small ...

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  • Phosphogypsum - An Industrial Byproduct with Value

    Phosphogypsum is a large-scale waste in the phosphates industry, incurring substantial management costs every year. And while there are some challenges to its beneficial reuse, successful reuse cases around the world, along with the opportunity to mitigate the risks associated with stacking and turn a profit in place of costs has many looking ...

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  • Procedure for extraction of rare earth elements from ...

    The method for extracting rare earth metals from phosphogypsum (1), including the leaching of phosphogypsum by sequential processing of multiple portions of phosphogypsum one solution of sulfuric acid with a concentration of 20-25 wt.% if F:T=2-3 with the extraction of rare earth metals and sodium in the leaching solution, separating the ...

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  • Use of phosphogypsum and flotation wastes from copper ...

    The region of glass formation was identified and some physicochemical properties of glasses in the phosphogypsum-kaolin-copper concentration plant flotation waste system were investigated. The basic crystalline phases of the crystallized glasses were determined by differential thermal and x-ray phase analysis and optical microscopy.

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  • "Upgrading Phosphogypsum for Uses as Construction ...

    Over 70% of the world's phosphate rock product is consumed by the "wet" process for production of phosphoric acid, which is mainly used for fertilizer manufacturing. In this process, roughly 5 tons of phosphogypsum (PG) are generated per ton of P2O5 produced. On that basis, at least 150 million tons of PG are being added annually to the world stockpile of billions of tons.

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  • Phosphogypsum purification for plaster production: A ...

    30 to 45 min using a floatation cell. The foam of floatation is formed of humic substances already present in the PG. Then, the pulp was filtered through a funnel, washed with water (1.5 L per 1 kg of PG) and dried 24 h at 65°C (Fig. 1). Fig. 1. Flow diagram for phosphogypsum purification process. 2.2. Radioactivity Measurements

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  • Minerals | Special Issue : Recent Trends in Phosphate ...

    Ball-grinding tests were used to reduce the coarse fraction +315 μm. Grounded materials were sieved to 71–315 μm and combined with the scrubbed fraction in the flotation feed. Reverse-flotation tests of the phosphate-rich fraction (71–315 μm) have helped to improve the P 2 O 5 grade to 27.1%, with a recovery rate of 92.4%. Full article

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  • Reprocessing of phosphogypsum for recovery of REE

    Flotation test work using hydroximate collectors under different conditions of grinding size, slurry pH and pre conditioning treatment were conducted. Flotation is not an efficient method comparing to screening for the enrichment of REE from the phosphogypsum.

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  • REE extraction from phosphoric acid, phosphoric acid ...

    Recent developments in REE mineral characterization and flotation reagents can be found in the works of Pradip and Fuerstenau (2013) and Lin, Hsieh and Miller (2013). ... Phosphogypsum, a major ...

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  • PECO Process for Producing Phosphoric Acid from Flotation Feed

    The PECO process can utilize flotation feed as a source of phosphate for phosphoric acid. This would eliminate the need for a flotation operation and its capital and operating costs. In addition to saving $24.00 per ton P2O5 it would also extend the reserves of Florida by 20%, reduce the area required for slime disposal and decrease the use of ...

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  • Method of processing phosphogypsum with extraction of rare ...

    Phosphogypsum is a heavy by-products (waste) processing of Apatite and phosphorite ores. So, when the sulfuric opening Kola Apatite for each ton of raw materials consumed 1.35 tonnes of sulphuric acid and is formed with 1.6 tons of phosphogypsum containing phosphorus, calcium, rare earth elements (cerium, lanthanum, neodymium, europium and ...

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  • Application of waste acid from phosphogysum dam as an eco ...

    Waste acid was obtained from the phosphogypsum dam of the WPA plant of Yunnan Phosphate Chemical Group Co. Ltd in Kunming, China, which is approximately 10 km away from the flotation plant. The flotation plant is also owned by the same company.

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  • The effect of phosphate flotation wastes and phosphogypsum ...

    Feb 15, 2020· In this study, the effect of phosphates flotation wastes (PFW) and phosphogypsum (PPG) on organic biomass degradation, compost quality, and plant growth was examined. Our results showed that PFW and PPG improve composting mechanisms, accelerate organic substance degradation, and increase fertilizing elements (P2O5, K2O, MgO, CaO). The low level of C/N ratio in the finished .

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  • (PDF) Rare Earth and Phosphorus Leaching from a Flotation ...

    During these processes, REEs and some phosphorus get lost in the byproducts including phosphatic clay, flotation tailings, phosphogypsum (PG), and phosphoric sludge. Recovering REEs .

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  • Method of extracting rare-earth metals (rem) from ...

    The invention relates to a hydrometallurgical and chemical industries and is designed to extract rare earth metals from waste phosphogypsum. To the present time in Russia during processing of the Apatit fertilizer accumulated in the form of industrial wastes more than 200 million tons of phosphogypsum (PG) and the volume of its warehouses is growing at a rate of 1.5 to 2.5 MMT however in ...

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  • In Situ Transmission Electron Microscopy Explores a New ...

    An example of this material is the Phosphogypsum (PG), which results from the processing of phosphate ore into phosphoric acid for fertilizer production. In order to support regulation of the reuse of phosphogypsum as a raw material of the Brazilian civil construction .

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  • US3951675A - Method for the treatment of phosphogypsum ...

    The purification of the raw phosphogypsum issued from the fabrication of phosphoric acid by reaction between phosphate rock and sulphuric acid consists of removing the extreme grain size fractions therefrom. This method has been developed after it has been found that a large part of the undesirable impurities are concentrated in the extreme grain fractions which constitute only a small ...

    Get Price →
  • UMSAEP UM-UWC Linkage Report

    theoretical aspect of froth flotation of phosphogypsum with regard to rare earth recovery. This allowed determination of the experimental conditions shown in Table 1 and the experimental setup shown in Figure 4 for a micro flotation test. These conditions were set for froth flotation (micro and bench scale)

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  • Economic Analysis of Rare Earth Elements Extraction from ...

    clay, phosphogypsum, and sludge. Each of these streams contain varying amounts of REEs. During the wet process for H 3 PO 4 production, the ore is separated into phosphate rock and waste streams of clay and amine flotation tails (sand). Through many mining .

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  • Byproduct Gypsum (e.g., Phosphogypsum, Etc.) Patents and ...

    Jul 07, 2017· The method includes mixing of 20-50% by weight of waste sulfur which is combined with 10-50% by weight of flotation waste from flotation of copper ore and 3-25% by weight of waste phosphogypsum as pH regulator. Finally, 10-40% by weight of mineral filler is added.

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  • EFFECTS OF IMPURITIES FROM PHOSPHOGYPSUM ON THE .

    nics mainly came from the floatation reagent of phos-phorite, where the floatation reagent is a surface-active agent. The supernatants were obtained from leaching PG for (2, 4 and 6) h. The chemical compositions of the supernatants are shown in Table 2, where the super-natants contained some impurities (e.g., P, F, Na, etc).

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  • Phosphogypsum - Wikipedia

    Phosphogypsum refers to the calcium sulfate hydrate formed as a by-product of the production of fertilizer from phosphate rock.It is mainly composed of gypsum (CaSO 4 ·2H 2 O). Although gypsum is a widely used material in the construction industry, phosphogypsum is usually not used, but is stored indefinitely because of its weak radioactivity.The long-range storage is controversial.

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  • In Situ Transmission Electron Microscopy Explores a New ...

    An example of this material is the Phosphogypsum (PG), which results from the processing of phosphate ore into phosphoric acid for fertilizer production. In order to support regulation of the reuse of phosphogypsum as a raw material of the Brazilian civil construction .

    Get Price →
  • Method of processing phosphogypsum

    When palpitation process in phosphogypsum goes up to 90% contained in the Apatite REE, and when digitatum process is only 60-70%. Given the scale of the processing of Apatite (8-10 million tons per year) and the content of REE in Apatite (0,8-1%), organization of the process of separating rare earth elements from phosphogypsum will fully meet ...

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  • Minerals | Free Full-Text | Rare Earth Occurrences in ...

    The process includes an apatite ore beneficiation by flotation and further processing of the beneficiation concentrate with sulfuric acid. Twenty-six, sixty-two and twelve percent of the total REOs (TREO) contents from the ore end up in the products of beneficiation tailings, phosphogypsum (PG) and phosphoric acid, respectively.

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