SU99590A1 - Method for preparing double superphosphate from apatite concentrate - Google Patents

Method for preparing double superphosphate from apatite concentrate

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Publication number
SU99590A1
SU99590A1 SU448933A SU448933A SU99590A1 SU 99590 A1 SU99590 A1 SU 99590A1 SU 448933 A SU448933 A SU 448933A SU 448933 A SU448933 A SU 448933A SU 99590 A1 SU99590 A1 SU 99590A1
Authority
SU
USSR - Soviet Union
Prior art keywords
double superphosphate
apatite concentrate
concentrate
preparing double
apatite
Prior art date
Application number
SU448933A
Other languages
Russian (ru)
Inventor
Е.Б. Бруцкус
Д.Л. Цырлин
Original Assignee
Е.Б. Бруцкус
Д.Л. Цырлин
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Е.Б. Бруцкус, Д.Л. Цырлин filed Critical Е.Б. Бруцкус
Priority to SU448933A priority Critical patent/SU99590A1/en
Application granted granted Critical
Publication of SU99590A1 publication Critical patent/SU99590A1/en

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Description

Двойной суперфосфат из апатитового концентрата, получаемый на экстракционной нли термической фосфорной кислоте, обладает очень плохими физическими свойствами: свежеприготовленный он сильно мажетс , а затем быстро схватываетс  в монолит, с трудом поддающийс  механической обработке.The double superphosphate from apatite concentrate, obtained on thermal phosphoric acid extraction oxide, has very poor physical properties: freshly prepared, it smears heavily, and then quickly sets into a monolith, which is difficult to mechanically process.

Предлагаемый способ получени  двойного суперфосфата из апатитового концентрата дает возможность получать продукт, который лпшен указанных выше недостатков. Согласно изобретению, разложение апатитового концентрата производитс  фосфорной кислотой, к которой добавлена серна  кислота в количестве 2-6% от веса апатитового концентрата. Перед концом смешени  апатитового концентрата с кислотой в смеситель добавл етс  молотый известн к, мел, доломит или какой-либо другой карбонатный материал в стехиометрическом количестве по отношеншо к введенной серной кислоте. По реакции между серной кислотой и карбонатом образуютс  сульфат кальци  (или магни ) и углекислый газ.The proposed method for the preparation of double superphosphate from apatite concentrate makes it possible to obtain a product that satisfies the aforementioned disadvantages. According to the invention, the decomposition of the apatite concentrate is produced by phosphoric acid, to which sulfuric acid is added in an amount of 2-6% by weight of the apatite concentrate. Before the end of the mixing of the apatite concentrate with the acid, ground lime, chalk, dolomite or some other carbonate material is added in a stoichiometric amount relative to the sulfuric acid introduced. Calcium sulfate (or magnesium) and carbon dioxide are formed by the reaction between sulfuric acid and carbonate.

Сульфат кальци  увеличивает содержание твердой фазы в двойном суперфосфате, а углекислый газ придает ему пористую структуру. В результате двойной суперфосфат получаетс  рассыпчатым и немажу1ЦИМСЯ .Calcium sulfate increases the solids content of the double superphosphate, and carbon dioxide gives it a porous structure. As a result, the double superphosphate is friable and stagnant.

Возможно ведение процесса и без применени  серной к: слоты, с добавкой одного лишь карбоната. В этом случае увеличиваетс  норма фосфорной кислоты, примен емой дл  разложени  апатитового концептрата, соответственно ко/Еичоству вводимого карбоната.It is possible to conduct the process without the use of sulfuric acid to: slots, with the addition of carbonate alone. In this case, the rate of phosphoric acid used to decompose the apatite konconterat, corresponding to the carbon dioxide input, increases.

Предмет изобретени Subject invention

Способ получени  двойного суперфосфата из апатитового концентрата путем раз.чожени  анатитового концентрата фосфорной кислотой, о т л н чают и и с   тем, что, с целью улучшени  физических свойств двойного суперфосфата, в реакционную емесь в процессе смегпенп  указанных компонентов добавл ют серную кислоту в количестве 2-6% от веса анатитового концентрата и (или) карбонатные материалы из расчета получени  гипса, воды и углекислоты .The method of obtaining double superphosphate from apatite concentrate by dissolving the anatite concentrate with phosphoric acid is also so that, in order to improve the physical properties of the double superphosphate, sulfuric acid in the amount of 2-6% by weight of anatite concentrate and / or carbonate materials at the rate of production of gypsum, water and carbon dioxide.

SU448933A 1951-05-12 1951-05-12 Method for preparing double superphosphate from apatite concentrate SU99590A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SU448933A SU99590A1 (en) 1951-05-12 1951-05-12 Method for preparing double superphosphate from apatite concentrate

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SU448933A SU99590A1 (en) 1951-05-12 1951-05-12 Method for preparing double superphosphate from apatite concentrate

Publications (1)

Publication Number Publication Date
SU99590A1 true SU99590A1 (en) 1953-11-30

Family

ID=48373796

Family Applications (1)

Application Number Title Priority Date Filing Date
SU448933A SU99590A1 (en) 1951-05-12 1951-05-12 Method for preparing double superphosphate from apatite concentrate

Country Status (1)

Country Link
SU (1) SU99590A1 (en)

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