Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol. 2016. V. 59. N 10. P. 41-46

One can see that there is the global trend all over the world of progressive depletion of industrially significant deposits of phosphate ores. Besides, there is reducing containing of the main’s component, phosphorus pentoxide, and amount in it at all. It’s requires from manufacturers of mineral fertilizers to pay attention on a poor ores and a low grade phos-phate raw materials. The study of its physical, chemical and technological features is directed on a search of the effective ways of their processing in to phosphoric acid and phosphate-based fertilizers. The processing of the poor and low grade phosphate to certified products is complicated by a high content of impurity species in it. These species have a close mutual germination of phosphate minerals that it is necessary to consider at adaptation of the new types of raw materials to the industrial technological schemes or in case of developing of a new effective ways of their processing. Focusing on the production of complex fertilizers by the nitric acid decomposition of Polpinsky phosphorite, in the present work it have been re-searched one of the most important properties of reaction slurries, obtaining during the acid decomposition of phosphate raw materials, the rheology of slurries at the stape of decompo-sition, ammonization and mixing with potassium containing component. The influences of the initial concentration of acid, the molar relation of ammonia and phosphoric acid, the ratio of liquid and solid phases and influence of potassium chloride adding for the viscosity of the ob-tained suspensions are shown. For the studied suspensions the dependence of viscosity on shear rate for the all above mentioned stapes was obtained. The fundamental technological feasibility of nitric acid processing of Polpinsky deposit phosphorite to the complex nitrogen-phosphorus- and nitrogen-phosphorus-potassium fertilizers is shown. Herewith the high ex-tent of raw material decomposition, about 99 per cents, and convey the phosphorus in digest-ible form in to the product was achieved.

Key words: acidic pulp, ammonized pulp, physical and mechanical properties

1. Angelov A.I., Levin B.V., Barbashin A.A. The phosphate fertilizers industry’s possibilities to provide Russian food secure. Mir sery, N, P and K. 2005.N 5. P. 3-9 (in Russian).
2. Technology of phosphoric and complex fertilizers. Eds. S.D. Evenchik and A.A. Brodsky. M.: Khimiya.1987. 464 p. (in Russian).
3. Petropavlovskiy I.A., Pochitalkina I.A., Kiselev V.G., Kondakov D.F., Sveshnikova L.B. The low grade phosphate raw mate-rials enrichment possibility estimation on the base of study of chemical and mineralogical composition.Chem. Ind. today. 2012. N4. P. 5-8 (in Russian).
4. Dobrydnev S.V., Pochitalkina I.A., Beskov V.S., Bogach V.V. The investigation of kinetic regularities of fluorapatite’s acid decomposition process by ionometric method. Zhurn. Prikl. Khim. 2001. V.74. N10. P. 1579-1581 (in Russian).
5. Dobrydnev S.V., Bogatch V.V., Potchitalkina I.A., Beskov V.S. Potentiometric (acidimetric) study of the fluoroapatite concen-trate decomposition reaction with nitric acid. Hemic industrie. 2000. N 54 (7-8). P. 319-323.
6. Pochitalkina I.A., Petropavlovskiy I.A., Okrushko E.Yu. The kinetic of polpinsky phosphorite decomposition by nitric and phosphoric acids. Uspekhi Khim. Khim. Tekhnol. 2014. V. 28. N 5(154). P. 133-135 (in Russian).
7. Pochitalkina I.A., Petropavlovskiy I.A., Filenko I.A., Kondakov D.F. Decomposition of high reactivity phosphate raw by discrete acid’input. Khim. Tekhnol. 2015. V.16. N3. P. 136-139 (in Russian).
8. Pochitalkina I.A., Petropavlovskiy I.A., Kiselev V.G. Crystallization of monocalciumphosphate from hydrochloric-phosphoric acid solution during poor phosphate raw processing. The materials of international scientific-practical conference “Phosphate raw: production and processing”. M.: FOSAGRO. 2012. P.17-19.
9. Petropavlovskiy I.A., Pochitalkina I.A., Kiselev V.G., Akhnazarova S.L., Myrzakhmetova B.B. Obtaining of monocalci-umphosphate from poor phosphate raw by liquid phase recycling method. Khim. Tekhnol. 2012. N8. P. 453-456 (in Russian).
10. Klassen P.V., Sushchev V.S., Klados D.K., Mironov V.E The study of domestic phosphorites using possibility (on egorievk’s example) for obtaining of phosphoric acid and phosphorous containing fertilizers. Khim. Promysh. Segodnya. 2010. N 2. P. 24-31 (in Russian).
11. Borisov V.M., Azhikina Yu.V., Galtsov A.V. Physical-chemical bases of production of phosphoric fertilizers. M.: Khimiya. 1983. 144 p. (in Russian).
12. Malyavin A.S., Kazak V.G., Brizitskaya N.M. The rheological properties of ammonized pulps obtained by using Vyatsko-Kamsk low grade phosphate raw. Khim. Tekhnol. 2007. V. 8. N 1. P. 23-24 (in Russian).
13. Kustyukova A.A., Pochitalkina I.A., Petropavlovskiy I.A. The investigation of acidic and ammonized phosphate pulps rheolog-ical properties. Uspekhi Khim. Khim. Tekhnol. 2014. V. 28. N5 (154). P. 114-116 (in Russian).

2016, Т. 59, № 10, Стр. 41-46


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