The insoluble part of phosphorus fertilizers, obtained by processing of phosphorites of central kyzylkum with partially ammoniated extraction phosphoric acid

Alimov, Umarbek; Reimov, A. M.; Namazov, Sh. S.; Beglov, B. M.

doi:10.1134/s107042721030328

Cited by 10 publications

(7 citation statements)

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“…The amount of the water-soluble fraction of organic substances extracted from the products with water was determined by filtration and evaporation in a water bath, drying the solid residue to a constant weight, and then burning it to determine the ash content and subtract it. Humic acids were isolated by treating the products with 0.1 N alkali solution followed by acidification of the solution with mineral acid [22]. The solid phase after the separation of alkali-soluble organic substances from it contains residual organic matter.…”

Section: Methodsmentioning

confidence: 99%

Obtaining complex fertilizers based on low-grade phosphorites

et al. 2021

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Section: Methodsmentioning

confidence: 99%

Obtaining complex fertilizers based on low-grade phosphorites

et al. 2021

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“…Earlier, the process of obtaining of ammophosphate fertilizers based on the decomposition of various types of Kyzylkum phosphorites by extraction phosphoric acid (EPA) with a concentration of 21.45 % P 2 O 5 was studied [4][5][6]. It has been established that an increase in the weight fraction of phosphate raw materials from 5 to 30 g in relation to 100 g of EPA leads to a decrease in its decomposition coefficient (C dec ) from 72.32 to 26.90; from 89.…”

Section: Introductionmentioning

confidence: 99%

“…Whereas in another version, it was checked whether the activation of carbonate phosphorites of Kyzylkum occurs in the case of their treatment with partially ammonized EPA [8].…”

Section: Introductionmentioning

confidence: 99%

Processing of a Washed Dry Concentrate Containing 26% P2o5 Into Ammophosphate, Sulpho- And Nitroammophosphate Fertilizers

Rasulov,

Namazov,

Seytnazarov

et al. 2024

JCTM

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The process of obtaining ammophosphate by means of phosphoric acid decomposition of washed dried concentrate (WDC) with 26 % Р2О5 and 10 % СО) - raw material for the production of thermally fired concentrate, has been studied. The extraction phosphoric acid contains (mass. %): 16.46 P2O5, 0.06 CaO, 1.11 MgO, 0.27 Fe2O3, 0.41 Al2O3, 2.98 SO3 and 0.99 F. The mass ratio of WPPA: WDC ranged from 100: 10 to 100: 30. Then acidic phosphate pulps (at 65°C) after 45 minutes were ammoniated to pH = 3.8, granulated and dried at 85 - 90°C. It has been shown that the nitrogen content in the finished product ranges from 4.92 - 7.11 %, total phosphorus (P2O 5t.) 41.48 - 46.44 %, phosphorus assimilated by plants (P2O5acceptable) 34.79 - 45.11 %, water-soluble phosphorus (P2O 5w.s.) 23.49 - 37.73 %. The addition of 5 - 7.5 % H2SO4 or HNO3 in the form of a monohydrate makes it possible to intensify the process of phosphoric acid decomposition of phosphate raw materials and to obtain sulfo- and nitroammophosphate with significantly highcontents of P2O5 acceptable and P2O5 w.s.. So, with a weight fraction of WDC equals to 30 and weight fractions of H2SO4 - 5 and 7.5, there have been 37.6 and 34.47 % P2O5 total in sulfoammophosphate; 24.11 and 22.06 % CaO t. , 88.75 and 96.4 % P2O5 acceptable: P2O5t., 77.39 and 79.54 % P2O5 w.s. : P2O5t., 6.03 and 7.08 % nitrogen, respectively. In the case of using HNO3, nitroammophosphate contains the largest amount of nitrogen due to additionally introduced nitric acid, but the phosphate raw material has a relatively low decomposition coefficient. The strength of granules of all brands of fertilizers averages 3.50 MPa and are quite suitable for bulk storage and transportation. Material balances for the production of ammophosphate, sulfoammophosphate and nitroammophosphate have been calculated.

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“…In the production of phosphoric acid from phosphorites, thousands of tons of uranium are lost annually. Since 0.01-0.02% of uranium contained in phosphorite is not extracted from phosphorites [24] on an industrial scale, it is possible to extract simultaneously with the production of 30% technical phosphoric acid obtained by the wet method. In the late 1940s and early 1950s, various methods of uranium extraction from phosphorites -extraction, chemical, and ion exchange -were developed in the United States [25].…”

Section: Introductionmentioning

confidence: 99%

The Role of Medium Condition for Uranium Separation from Central Kyzylkum’s Low-grade Phosphorite after Sulfuric Acid Treatment

Tagayev¹,

Doniyarov²,

Asrorov³

et al. 2022

International Journal on Advanced Science, Engineering and Information Technology

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This article presents the results of separating radioactive elements, particularly uranium, from low-grade phosphorites of the Central Kyzylkum by low concentrated sulfuric acid solution, which is practically feasible at the Kyzylkum phosphorite combine (KPC). In world practice, uranium was extracted from phosphorite ore in the countries of the Middle East (Syria, Morocco, Algeria, Egypt) at the final stages of obtaining phosphorus fertilizers at metallurgical and chemical plants. The extraction of uranium from phosphorite ore is not practiced in Uzbekistan. The proposed method is fundamentally different from the above and is recommended to be applied at the initial stage of enrichment phosphorite ores in the enrichment plants. Studies have shown that the uranium completely passed into solution by treating phosphorite ore with weak concentrated sulfuric acid solution. Analyses of solution and sediment composition showed that the useful component, P2O5, remained in the sediment, increasing from 8.69% to 10.3%, while uranium passed into the solution with alkaline salts alkaline-earth elements. To obtain a finished product, the resulting enriched solution was added to the richer phosphorite ore. When performing the above processes, the pH of the medium was kept at the neutral level, which is of great practical importance for the implementation of this method with minimal economic costs using conventional inventory, corrosion resistance, and environmentally friendly phosphorus fertilizer.

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The insoluble part of phosphorus fertilizers, obtained by processing of phosphorites of central kyzylkum with partially ammoniated extraction phosphoric acid

Cited by 10 publications

References 0 publications

Obtaining complex fertilizers based on low-grade phosphorites

Obtaining complex fertilizers based on low-grade phosphorites

Processing of a Washed Dry Concentrate Containing 26% P2o5 Into Ammophosphate, Sulpho- And Nitroammophosphate Fertilizers

The Role of Medium Condition for Uranium Separation from Central Kyzylkum’s Low-grade Phosphorite after Sulfuric Acid Treatment

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