SU773036A1 - Method of producing granulated double superphosphate - Google Patents
Method of producing granulated double superphosphate Download PDFInfo
- Publication number
- SU773036A1 SU773036A1 SU772517735A SU2517735A SU773036A1 SU 773036 A1 SU773036 A1 SU 773036A1 SU 772517735 A SU772517735 A SU 772517735A SU 2517735 A SU2517735 A SU 2517735A SU 773036 A1 SU773036 A1 SU 773036A1
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- SU
- USSR - Soviet Union
- Prior art keywords
- phosphoric acid
- double superphosphate
- dried
- acid
- mass
- Prior art date
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- Fertilizers (AREA)
Description
1one
Изобретение относитс к производству минеральных удобрений и может быть использовано дл получени двойного суперфосфата.The invention relates to the production of mineral fertilizers and can be used to produce double superphosphate.
Известен способ получени двойного суперфосфата поточным методом путем разложени фосфатного сырь фосфорной кислотой с послед тощим высушиванием части образующейс суспензии в распылительной сушилке, гранулированием высушенного продукта при увлажнении оставшейс суспензии и сушкой целевого продукта в барабанной сушилке l .A known method of producing double superphosphate by the flow method is by decomposing the phosphate raw material with phosphoric acid, followed by a dry drying of a part of the resulting suspension in a spray dryer, granulating the dried product while moistening the remaining suspension and drying the desired product in a drum dryer l.
Недостатком указанного способа вл етс необходимость удалени большого количества влаги при сушке вследствие низкой концентрации примен емой фосфорной кислоты.The disadvantage of this method is the need to remove a large amount of moisture during drying due to the low concentration of phosphoric acid used.
Наиболее близким по технической сущности к предлагаемому ат етс способ получени двойного суперфосфата, включающий обработку фосфатного сырь слабой фосфорной кислотой с последующей обработкой концентрированной фосфорной кислотой 2.The closest in technical essence to the proposed method is a method of producing double superphosphate, which includes the treatment of phosphate raw materials with weak phosphoric acid followed by treatment with concentrated phosphoric acid 2.
Недостаток этого способа заключаетс в низкой его интенсивности, обусловленной длительностью складского дозревани продукта.The disadvantage of this method lies in its low intensity, due to the duration of storage maturation of the product.
Цель изобретени - упрощение и интенсификаци процесса получени гранулированного двойного суперфосфата за счет устранени складского дозревани .The purpose of the invention is to simplify and intensify the process of obtaining granulated double superphosphate by eliminating storage maturation.
Поставленна цель достигаетс тем, что обработку фосфатного сырь ведут слабой фосфорной кислотой с последующей обработкой концентрированной фосфорной кислотой, сушку к гранулирование массы провод т при увлажнении, массу после обработки слабой кислотой высушивают до влажности 2-6%, а затем гранулируют при смешении с концентрированной фосфорной кислотой, довод суммарную норму кислоты до 85-100% от стехиометрии , и сушат.The goal is achieved by the treatment of phosphate raw materials with weak phosphoric acid followed by treatment with concentrated phosphoric acid, drying to granulation of the mass is carried out with moistening, the mass after treatment with weak acid is dried to a moisture content of 2-6%, and then granulated with mixing with concentrated phosphoric acid acid, cumulative rate of acid to 85-100% of stoichiometry, and dried.
Длительность процесса по описываемому способу не превышает 1О ч.The duration of the process according to the described method does not exceed 1O h.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU772517735A SU773036A1 (en) | 1977-08-01 | 1977-08-01 | Method of producing granulated double superphosphate |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU772517735A SU773036A1 (en) | 1977-08-01 | 1977-08-01 | Method of producing granulated double superphosphate |
Publications (1)
Publication Number | Publication Date |
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SU773036A1 true SU773036A1 (en) | 1980-10-23 |
Family
ID=20722207
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU772517735A SU773036A1 (en) | 1977-08-01 | 1977-08-01 | Method of producing granulated double superphosphate |
Country Status (1)
Country | Link |
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SU (1) | SU773036A1 (en) |
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1977
- 1977-08-01 SU SU772517735A patent/SU773036A1/en active
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