Physico-chemical properties lime-ammonium nitrate based on chalk, nitrate and ammonium sulphate

Rasulov, Oybek; Mamataliyev, Abdurasul; Rasulova, Dilnavoz; Temirov, Uktam; Namazov, Shafаat

doi:10.1051/e3sconf/202126404012

Cited by 10 publications

(5 citation statements)

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“…In the next stage of the work, the influence of the dispersed composition of ammonium sulfate on the strength of granules of sulfated urea was studied. It is known that the higher the strength of fertilizer granules, the longer the product is stored in a crumbly state, and it also affects the caking of the product [19][20][21][22].…”

Section: Resultsmentioning

confidence: 99%

Influence of the amount and fineness of grinding of ammonium sulfate on the properties of sulfate-containing urea

Saydullayev

Namazov²,

Mirsalimova

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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The objective of this work is to determine the optimal technological mode for obtaining sulfated urea with a balanced content of nitrogen and sulfur by adding ammonium sulfate to the urea melt before granulation. The article presents the results of a study of the dependence of the properties of sulfated urea on the degree of grinding and on the amount of ammonium sulfate, expressed by the mass ratio of CO (NH2)2: (NH4)2SO4 = 100 : (2.5-50). Methods for obtaining, granulating and studying the properties of sulfated urea samples are presented. In fertilizers obtained with the addition of ammonium sulfate to the urea melt at the studied ratios, the strength of the granules increases from the initial 2,53 to 4,80 MPa, the gyroscopic point decreases from 58,4% to 52,3. It was also revealed that when ammonium sulfate is added to the urea melt, the density and viscosity of the melt increase with an increase in the amount of ammonium sulfate introduced. At 135 ° C, an increase in the addition of ammonium sulfate from 2,5 to 50,0 mass parts per 100 mass parts of urea leads to an increase in density from 1,162 to 1,412 g/cm3, viscosity from 2,56 to 7,91 cΠɜ. It was found that the smaller the particle size of ammonium sulfate, the higher the strength of the urea granules. With a decrease in the dispersion of ammonium sulfate particles from 0,25 to 0,04 mm, the strength of sulfated urea granules increases, the presence of ammonium sulfate in the composition of urea reduces the dissolution rate, which makes it possible to prolong their action, in addition, it lowers the pH of the product, which prevents the release of ammonia during storage and transportation sulfated urea.

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Section: Resultsmentioning

confidence: 99%

Influence of the amount and fineness of grinding of ammonium sulfate on the properties of sulfate-containing urea

Saydullayev

Namazov²,

Mirsalimova

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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“…Extensive agrochemical tests of ammophosphate have shown that in terms of efficiency it is not inferior to ammophos and double superphosphate and can be used in various soil and climatic zones for all agricultural crops [6].…”

Section: Introductionmentioning

confidence: 99%

Obtaining ammophosphate and sulfoammophosphate fertilizers on base of the washed dry concentrate containing 26% P₂O₅

Rasulov,

Juraev,

Toshtemirova

et al. 2024

E3S Web of Conf.

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The process of obtaining ammophosphate by means of phosphoric acid decomposition of washed dried concentrate (WDC with 26% P2O5 and 10% CO2) - raw material for the production of thermally fired concentrate, has been studied. The wet process phosphoric acid (WPA) contains (wt.%): 16.46 P2O5, 0.06 CaO, 1.11 MgO, 0.27 Fe2O3, 0.41 Al2O3, 2.98 SO3 and 0.99 F. The weight ratio of WPA: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 (P2O5t.) 41.48-46.44%, phosphorus acceptable by citric acid (P2O5ac.c.a.) 34.79-45.11%, phosphorus form of water soluble (P2O5w.s.) 23.49-37.73%. Weight fractions of H2SO4 - 5 and 7.5 were optimal and the product contains 37.6 and 34.47% of P2O5t.; 24.11 and 22.06% CaOt., 88.75 and 92.40% P2O5ac.c.a.by citric acid: P2O5t., 84.21 and 89.7% P2O5ac.tr.b. by trilon B: P2O5t., 77.39 and 79.54% P2O5w.s.:P2O5t., 6.03 and 7.08% nitrogen, respectively. The strength of granules of fertilizers averages 3.50 MPa and are quite suitable for bulk storage and transportation.

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“…The optimal norm (60%) of sulfuric acid and the weight ratio of phosphorite to oxidized coal (1 : 0.25) were found. Highly efficient humic superphosphates have been obtained from all types of raw materials, even as poor as ordinary phosphate flour [25][26][27][28][29][30].…”

Section: Introductionmentioning

confidence: 99%

Studies of the physico-chemical properties of humic simple superphosphate obtained on the basis of Central Kyzylkum phosphorites and oxidized coal

Ganiev

Namazov²,

Usanbaev³

et al. 2023

E3S Web Conf.

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This article presents the results of the physical and chemical properties of humic simple superphosphate obtained by decomposition of the ordinary phosphorous flour of the Central Kyzylkum with sulfuric acid and the addition of oxidized coal from the Angren deposit with hydrogen peroxide. The distinctive characteristics of humic simple superphosphate are shown in comparison with simple superphosphate obtained without the addition of oxidized coal.

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Physico-chemical properties lime-ammonium nitrate based on chalk, nitrate and ammonium sulphate

Cited by 10 publications

References 1 publication

Influence of the amount and fineness of grinding of ammonium sulfate on the properties of sulfate-containing urea

Influence of the amount and fineness of grinding of ammonium sulfate on the properties of sulfate-containing urea

Obtaining ammophosphate and sulfoammophosphate fertilizers on base of the washed dry concentrate containing 26% P₂O₅

Studies of the physico-chemical properties of humic simple superphosphate obtained on the basis of Central Kyzylkum phosphorites and oxidized coal

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Physico-chemical properties lime-ammonium nitrate based on chalk, nitrate and ammonium sulphate

Cited by 10 publications

References 1 publication

Influence of the amount and fineness of grinding of ammonium sulfate on the properties of sulfate-containing urea

Influence of the amount and fineness of grinding of ammonium sulfate on the properties of sulfate-containing urea

Obtaining ammophosphate and sulfoammophosphate fertilizers on base of the washed dry concentrate containing 26% P2O5

Studies of the physico-chemical properties of humic simple superphosphate obtained on the basis of Central Kyzylkum phosphorites and oxidized coal

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Obtaining ammophosphate and sulfoammophosphate fertilizers on base of the washed dry concentrate containing 26% P₂O₅