SU850637A1 - Method of producing complex potassium-nitrogen fertilizer - Google Patents
Method of producing complex potassium-nitrogen fertilizer Download PDFInfo
- Publication number
- SU850637A1 SU850637A1 SU792763928A SU2763928A SU850637A1 SU 850637 A1 SU850637 A1 SU 850637A1 SU 792763928 A SU792763928 A SU 792763928A SU 2763928 A SU2763928 A SU 2763928A SU 850637 A1 SU850637 A1 SU 850637A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- potassium
- nitrogen fertilizer
- processing
- polygalite
- producing complex
- Prior art date
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- Fertilizers (AREA)
Description
Изобретение относитс к способам получени высококонцентрированного комплексного калийно-азотного удобрени . Известен способ получени комплексно го азотно-калийно-фосфорно-магниевого удобрени путем азотнокислого разложени апатита с использованием полигалита дл вывода кальци в виде гипса, образующегос в результате обменной реакции, с последующей нейтрализацией жидкой фазы аммиаком до значени рН от 3 до 5, Недостатком известного способа вл етс то, что в процессе образуетс большое количество гипса, который не находит практического применени . Наиболее близким к предлагаемому по технической сущности и достигаемому результату вл етс способ получени азот- но-калийно-магниевого удобрени путем азотнокислого разложени полигалита, последующей нейтрализацией азотной кислоты известью и обессульфачиванием растворов с образованием в твердой фазе гипса 21. Недостатков указанных способов вл етс то, что в процессе получени комплексных удобрений образуетс большое количество гипса, который не находит практического применени , а также низка степень извлечени калн из руды. Цель изобретени - устранение вышеуказанных недостатков и повышение степени извлечени кали из полимннеральной рулы. Поставленна ; цель достигаетс тем, что в предлагаемом способе получени комплексного калийно-азотного удобрени путем переработки полигалита переработку ведут 25-34%-ным раствором нитрата натри при соотношении 5-7;1 с последующим отделением нерастворимого остатка и введением в получаемый осветленный щелок xлqэиcтoгo кали . Целесообразнее в качестве полигалита использовать полигалитовый остаток, получаемый в процессе переработки полиминеральных калийных руд. Пслигалитовьш остаток имеет следующий средний химический состав.The invention relates to methods for producing highly concentrated complex potassium nitrogen fertilizer. A known method of producing complex nitrogen-potassium-phosphorus-magnesium fertilizer by nitric decomposition of apatite using polyhalite to remove calcium in the form of gypsum, formed as a result of the exchange reaction, followed by neutralization of the liquid phase with ammonia to a pH value of from 3 to 5. is that in the process a large amount of gypsum is formed, which does not find practical application. The closest to the proposed technical essence and the achieved result is a method of producing nitrogen-potassium-magnesium fertilizer by nitric acid decomposition of polyhalite, followed by neutralizing the nitric acid with lime and obessing with solutions to form gypsum 21 in the solid phase. The disadvantages of these methods are that in the process of obtaining complex fertilizers a large amount of gypsum is formed, which does not find practical application, as well as a low degree of extraction of Kaln from ores . The purpose of the invention is to eliminate the aforementioned disadvantages and increase the degree of potassium recovery from the polymill roll. Delivered; The goal is achieved by the fact that in the proposed method of obtaining complex potassium-nitrogen fertilizer by processing polyhalite, the processing is carried out with a 25-34% sodium nitrate solution in a ratio of 5-7; 1 followed by separating the insoluble residue and introducing the resulting clarified lye into potassium. It is more expedient to use polyhalite residue obtained in the course of processing of mineral minerals potash ore as polyhalite. The psgalithic residue has the following average chemical composition.
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU792763928A SU850637A1 (en) | 1979-05-03 | 1979-05-03 | Method of producing complex potassium-nitrogen fertilizer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU792763928A SU850637A1 (en) | 1979-05-03 | 1979-05-03 | Method of producing complex potassium-nitrogen fertilizer |
Publications (1)
Publication Number | Publication Date |
---|---|
SU850637A1 true SU850637A1 (en) | 1981-07-30 |
Family
ID=20826770
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU792763928A SU850637A1 (en) | 1979-05-03 | 1979-05-03 | Method of producing complex potassium-nitrogen fertilizer |
Country Status (1)
Country | Link |
---|---|
SU (1) | SU850637A1 (en) |
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1979
- 1979-05-03 SU SU792763928A patent/SU850637A1/en active
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