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Production of suspension fertilizers as a potential way of managing industrial waste

100%
Mikła D., Hoffmann K., Hoffmann J.
Polish Journal of Chemical Technology
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2007
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vol. 9
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issue 3
9-11
EN
Research on the possibilities of utilizing several waste substances for the production of suspension fertilizers has been carried out. The substances were: sludge from the ALWERNIA S.A. Chemical Plant - a potential source of phosphorous (~20% by wt. P2O5) and waste sludge from the production of magnesium sulphates and nitrates in the Złotniki S.A. Chemical Plant - a substance aiding the stability of suspension and magnesite (a source of magnesium). The possibility of chemical activation of clayey minerals through ion exchange was investigated. Na2CO3 was used for this purpose. Fertilizer samples PK and NPK were found to be highly stable (syneresis < 25%). The NPK +3% MgO sample was found to have particularly good properties. The activation of the clayey materials by Na2CO3 resulted in an increase in the stability coefficient in the case of bentonite SN and clay TIK by 0.88964 and 0.516304, respectively.
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Revalorization of Mineral Coal, to Obtain Carbonaceous Materials with High Added Value

75%
Vidal-Lombas J.-J., Álvarez-Fernández M.-I., Casado-Sulé M.-C., Prendes-Gero M.-B., Suárez-Domínguez F.-J., Vidal-Lombas J.-J., Álvarez-Fernández M.-I., Casado-Sulé M.-C., Prendes-Gero M.-B., Suárez-Domínguez F.-J.
Archives of Mining Sciences
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2020
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vol. 65
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issue 2
3
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Nitrogen-Phosphorous Fertilizers on the Base of Concentrated Ammonium Nitrate Solution and Central Kyzylkum Phosphate Raw Material

75%
Akhmed R., Shafoat N.
Polish Journal of Chemical Technology
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2014
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vol. 16
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issue 3
30-35
EN
This article presents obtaining of nitrogen-phosphate fertilizers by reacting ordinary phosphate powder from Central Kyzylkum (Uzbekistan) with 70-90% ammonium nitrate solution at 100ºС. Chemical composition of the fertilizers was determined fully. Relevant consistence of acceptable forms of Р2О5 and СаО in the product extremely decreased by the increase of amount of phosphate raw material (PRM) in reaction mixture. The addition of phosphate additive into ammonium nitrate solution significantly increases toughness of ammonium nitrate granules and their growth velocity proportionally by phosphate powder added. Herewith, initial concentration of ammonium nitrate did not effect practically on the granule’s toughness. It is described that, phosphate additive decreases the speed of solubility of ammonium nitrate granules almost up to 1.83 times. On our opinion, decrease of fertilizer solubility is the result of growing phosphorite share in the products. The more is the phosphorite share, the more slowly dissolution process of the fertilizer granule does occur.
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