Open AccessAcid-free activation process of Vyatka – Kama phosphate in the presence of nitrogen-and potassium-containing salts
Author(s) -
V. I. Shatsilо,
A. F. Minakouski
Publication year - 2019
Publication title -
vescì nacyânalʹnaj akadèmìì navuk belarusì. seryâ hìmìčnyh navuk
Language(s) - English
Resource type - Journals
eISSN - 2524-2342
pISSN - 1561-8331
DOI - 10.29235/1561-8331-2019-55-4-464-471
Subject(s) - potassium , phosphorite , chemistry , ammonium , salt (chemistry) , phosphate , ammonium sulfate , nitrogen , fertilizer , ammonium nitrate , potash , chloride , inorganic chemistry , potassium sulfate , mineral , nitrate , nuclear chemistry , chromatography , biochemistry , organic chemistry
The work describes the production of complex fertilizers of prolonged effect on the basis of acid-free processing of phosphate rock of the Vyatka-Kama Deposit. The authors investigated the influence of chemical composition of salts and mass ratio between salt and phosphate components on the degree of activation of the phosphorite flour of the Vyatka-Kama Deposit (VKPF) during its treatment with solutions and suspensions of nitrogen-containing mineral salts and potassium chloride. It has been determined that the content of available form of P 2 O 5 in phosphorite increases by 1.5-2 times, and the greatest activating effect is provided by ammonium salts. The use of preliminary mechanical activation of VKPF, in the method investigated, provides the increase in the content of available form of P 2 O 5 by 11–13 %. The mechanism of interaction of the main minerals of phosphorite with salt additives (ammonium sulfate, ammonium nitrate, ammonium chloride, carbamide, potassium chloride) is proposed. The dynamics of changes in the content of ammonium nitrogen in fertilizer compositions at each stage of the process has been determined. The method for producing complex fertilizers based on phosphorite flour of the Vyatka-Kama Deposit has been developed and patented.