WO2001090031A1 - Soil builder in powder form and method for obtaining same - Google Patents

Soil builder in powder form and method for obtaining same Download PDF

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Publication number
WO2001090031A1
WO2001090031A1 PCT/FR2001/001614 FR0101614W WO0190031A1 WO 2001090031 A1 WO2001090031 A1 WO 2001090031A1 FR 0101614 W FR0101614 W FR 0101614W WO 0190031 A1 WO0190031 A1 WO 0190031A1
Authority
WO
WIPO (PCT)
Prior art keywords
superphosphate
tri
magnesium
amendment
particle size
Prior art date
Application number
PCT/FR2001/001614
Other languages
French (fr)
Inventor
Daniel Daviller
Original Assignee
Fibac
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 Fibac filed Critical Fibac
Priority to AU64020/01A priority Critical patent/AU6402001A/en
Publication of WO2001090031A1 publication Critical patent/WO2001090031A1/en

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05B—PHOSPHATIC FERTILISERS
    • C05B1/00—Superphosphates, i.e. fertilisers produced by reacting rock or bone phosphates with sulfuric or phosphoric acid in such amounts and concentrations as to yield solid products directly
    • C05B1/04—Double-superphosphate; Triple-superphosphate; Other fertilisers based essentially on monocalcium phosphate
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05D—INORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C; FERTILISERS PRODUCING CARBON DIOXIDE
    • C05D3/00—Calcareous fertilisers
    • C05D3/02—Calcareous fertilisers from limestone, calcium carbonate, calcium hydrate, slaked lime, calcium oxide, waste calcium products

Definitions

  • the present invention relates to an amendment, in the form of a powder, which comprises a source of phosphorus and a source of potassium associated with a calcium and / or magnesium oxide, as well as to a process for obtaining it.
  • An amendment is defined as a substance which, when incorporated into the soil, has the effect of improving its physical properties and may also modify its chemical and biological properties.
  • the amendments there are in particular calcium and magnesium amendments which contain calcium and magnesium in the form of oxides, hydroxides or carbonates and which are intended in particular to maintain or raise the pH of the soil.
  • One of the aims of the present invention is therefore to provide an amendment which comprises a source of phosphorus, a source of potassium and a calcium and / or magnesium oxide without the formation of compounds which are subsequently insoluble in the soil. after spreading.
  • Another object of the invention is to provide such an amendment which can be in powder form.
  • TSP tri-superphosphate
  • CaO calcium oxide
  • MgO magnesium
  • the particle size of the tri-superphosphate (TSP) is less than or equal to 2 mm and, preferably, between 0.5 and 1.5 mm.
  • the source of potassium is potassium chloride or sulphate, the particle size of which is less than or equal to 1 mm.
  • the present invention also relates to a process for manufacturing the above amendment, according to which dry mixing of tri-superphosphate (TSP) in the form of granules whose particle size is less than or equal to 2 mm and calcium oxide (CaO) and / or magnesium (MgO) in the form of powder with a particle size less than or equal to 2 mm and potassium chloride (KCI) or potassium sulfate (K 2 SO 4 ) with a particle size of less than or equal to 1 mm.
  • TSP tri-superphosphate
  • CaO calcium oxide
  • MgO magnesium
  • KCI potassium chloride
  • K 2 SO 4 potassium sulfate
  • the present invention combines granulated tri superphosphate (TSP), which constitutes a phosphorus supply directly assimilable by plants, with powdered potassium chloride or sulfate (KCI / K 2 SO 4 ), which constitutes a potassium contribution in the form chloride or sulfate, and powdered calcium and / or magnesium oxide.
  • TSP granulated tri superphosphate
  • KCI / K 2 SO 4 powdered potassium chloride or sulfate
  • calcium and / or magnesium oxide powdered calcium and / or magnesium oxide.
  • the present invention also relates to a process for obtaining an amendment such as that described above according to which one introduces into a screw mixer, after having weighed in a weighing hopper situated above the inlet of this mixer, d 'first lime and / or magnesium, then tri-superphosphate (TSP) which constitutes the supply of P 2 O 5 , then finally potassium chloride or sulfate.
  • TSP tri-superphosphate
  • the mixing is carried out for a minimum time of 30 seconds at 162 revolutions / minute.
  • the mixer used is of the type with two screws which are inclined from the inlet to the outlet and which are each arranged in a trough.
  • a mixture is recovered, which constitutes the amendment according to the present invention, and which is either stored in bulk, or bagged for storage or immediate delivery, or transported in bulk.

Abstract

The invention concerns a soil builder comprising a phosphorus source and a potassium source. It contains tri-superphosphate (TSP) in the form of granules, whereof the size is not more than 2 mm, as phosphorus source and a calcium (CaO) and/or magnesium (MgO) oxide in powder form. The invention is applicable in agriculture.

Description

AMENDEMENT SOUS FORME DE POUDRE ET SON PROCEDE D'OBTENTION POWDER AMENDMENT AND PROCESS FOR PRODUCING THE SAME
La présente invention est relative à un amendement, sous forme de poudre, qui comprend une source de phosphore et une source de potassium associées à un oxyde de calcium et/ou de magnésium, ainsi qu'à un procédé pour son obtention. Un amendement est défini comme étant une substance qui, incorporée au sol, a pour effet d'en améliorer les propriétés physiques et peut aussi en modifier les propriétés chimiques et biologiques. Parmi les amendements, on distingue notamment les amendements calciques et magnésiens qui contiennent du calcium et du magnésium sous forme d'oxydes, d'hydroxydes ou de carbonates et qui sont destinés notamment à maintenir ou à élever le pH du sol.The present invention relates to an amendment, in the form of a powder, which comprises a source of phosphorus and a source of potassium associated with a calcium and / or magnesium oxide, as well as to a process for obtaining it. An amendment is defined as a substance which, when incorporated into the soil, has the effect of improving its physical properties and may also modify its chemical and biological properties. Among the amendments, there are in particular calcium and magnesium amendments which contain calcium and magnesium in the form of oxides, hydroxides or carbonates and which are intended in particular to maintain or raise the pH of the soil.
Par ailleurs en agriculture, on utilise souvent comme engrais les superphosphates qui renferment comme composants essentiels un phosphate mono- et/ou bi calcique et du sulfate de calcium. Mais dans le sol, on assiste parfois à une rétrogradation conduisant à la formation de produits insolubles dans l'eau, tels que des phosphates tricalciques.In addition, in agriculture, superphosphates are often used as fertilizers, which contain as essential components a mono- and / or bi-calcium phosphate and calcium sulphate. However, in the soil, there is sometimes a demotion leading to the formation of products insoluble in water, such as tricalcium phosphates.
Actuellement pour détériorer au minimum la structure des sols mais aussi pour des raisons économiques, on préconise d'effectuer un minimum de passage : ceci conduit l'agriculteur à en particulier grouper les produits à épandre. Mais mélanger ces derniers n'est pas toujours possible, en particulier pour les raisons indiquées ci-dessus.Currently to minimize the soil structure but also for economic reasons, it is recommended to carry out a minimum of passage: this leads the farmer in particular to group the products to be spread. But mixing these is not always possible, especially for the reasons stated above.
Aussi un des buts de la présente invention est-il de fournir un amendement qui comprend une source de phosphore, une source de potassium et un oxyde de calcium et/ou de magnésium sans qu'il ne se forme de composés insolubles ultérieurement dans le sol après épandage. Un autre but de l'invention est de fournir un tel amendement qui puisse se présenter sous forme pulvérulente.One of the aims of the present invention is therefore to provide an amendment which comprises a source of phosphorus, a source of potassium and a calcium and / or magnesium oxide without the formation of compounds which are subsequently insoluble in the soil. after spreading. Another object of the invention is to provide such an amendment which can be in powder form.
Ces buts, ainsi que d'autres qui apparaîtront par la suite, sont atteints par un amendement du type ci-dessus, qui est caractérisé, selon la présente invention, par le fait qu'il contient du tri-superphosphate (TSP), comme source de phosphore, sous forme de granulés et un oxyde de calcium (CaO) et/ou de magnésium (MgO) en poudre.These aims, as well as others which will appear subsequently, are achieved by an amendment of the above type, which is characterized, according to the present invention, by the fact that it contains tri-superphosphate (TSP), as source of phosphorus, in the form of granules and a powdered calcium oxide (CaO) and / or magnesium (MgO).
De préférence, la granulométrie du tri-superphosphate (TSP) est inférieure ou égale à 2 mm et, préférentiellement, comprise entre 0,5 et 1 ,5 mm. Quant à celle de l'oxyde de calcium (CaO) et/ou de magnésium (MgO), elle est inférieure ou égale à 2 mm. Avantageusement, la source de potassium est du chlorure ou du sulfate de potassium, dont la granulométrie est inférieure ou égale à 1 mm.Preferably, the particle size of the tri-superphosphate (TSP) is less than or equal to 2 mm and, preferably, between 0.5 and 1.5 mm. As for that of calcium oxide (CaO) and / or magnesium (MgO), it is less than or equal to 2 mm. Advantageously, the source of potassium is potassium chloride or sulphate, the particle size of which is less than or equal to 1 mm.
La présente invention concerne également un procédé pour fabriquer l'amendement ci-dessus, selon lequel on mélange à sec du tri-superphosphate (TSP) sous forme de granulés dont la granulométrie est inférieure ou égale à 2 mm et de l'oxyde de calcium (CaO) et/ou de magnésium (MgO) sous forme de poudre dont la granulométrie est inférieure ou égale à 2 mm et du chlorure de potassium (KCI) ou du sulfate de potassium (K2SO4) dont la granulométrie est inférieure ou égale à 1 mm. II est apparu que la biodisponibilité du phosphore de l'amendement selon la présente invention est identique à celle du phosphore du tri-superphosphate qui est l'amendement de référence dans ce domaine : il n'y a donc pas de phénomènes de rétrogradation.The present invention also relates to a process for manufacturing the above amendment, according to which dry mixing of tri-superphosphate (TSP) in the form of granules whose particle size is less than or equal to 2 mm and calcium oxide (CaO) and / or magnesium (MgO) in the form of powder with a particle size less than or equal to 2 mm and potassium chloride (KCI) or potassium sulfate (K 2 SO 4 ) with a particle size of less than or equal to 1 mm. It appeared that the bioavailability of the phosphorus of the amendment according to the present invention is identical to that of the phosphorus of tri-superphosphate which is the reference amendment in this field: there are therefore no retrogradation phenomena.
La présente invention associe du tri superphosphate (TSP) granulé, qui constitue un apport en phosphore directement assimilable par les plantes, à du chlorure ou du sulfate de potassium (KCI/K2SO4) pulvérulent, qui constitue un apport en potasse sous forme chlorure ou sulfate, et à de l'oxyde de calcium et/ou de magnésium pulvérulents.The present invention combines granulated tri superphosphate (TSP), which constitutes a phosphorus supply directly assimilable by plants, with powdered potassium chloride or sulfate (KCI / K 2 SO 4 ), which constitutes a potassium contribution in the form chloride or sulfate, and powdered calcium and / or magnesium oxide.
La présente invention est aussi relative à un procédé pour obtenir un amendement tel que celui décrit ci-dessus selon lequel on introduit dans un mélangeur à vis, après avoir pesé dans une trémie peseuse située au-dessus de l'entrée de ce mélangeur, d'abord la chaux calcique et/ou magnésienne, puis du tri- superphosphate (TSP) qui constitue l'apport en P2O5, puis enfin du chlorure ou sulfate de potassium. Le mélange est effectué pendant un temps minimum de 30 secondes à 162 tours/minute.The present invention also relates to a process for obtaining an amendment such as that described above according to which one introduces into a screw mixer, after having weighed in a weighing hopper situated above the inlet of this mixer, d 'first lime and / or magnesium, then tri-superphosphate (TSP) which constitutes the supply of P 2 O 5 , then finally potassium chloride or sulfate. The mixing is carried out for a minimum time of 30 seconds at 162 revolutions / minute.
Le mélangeur utilisé est du type à deux vis qui sont inclinées de l'entrée vers la sortie et qui sont disposées chacune dans une auge.The mixer used is of the type with two screws which are inclined from the inlet to the outlet and which are each arranged in a trough.
A l'issue de cette phase de mélange, on récupère un mélange, qui constitue l'amendement selon la présente invention, et qui est soit stocké en vrac, soit ensaché pour stockage ou livraison immédiate, soit transporté en vrac. At the end of this mixing phase, a mixture is recovered, which constitutes the amendment according to the present invention, and which is either stored in bulk, or bagged for storage or immediate delivery, or transported in bulk.

Claims

R E V E N D I C A T I O N S
1. - Amendement comprenant du tri-superphosphate comme source de phosphore, une source de potassium et un oxyde de calcium (CaO) et/ou de magnésium (MgO), caractérisé par le fait que le tri-superphosphate est sous forme de granulés et l'oxyde de calcium et/ou de magnésium sous forme de poudre. 1. - Amendment comprising tri-superphosphate as a source of phosphorus, a source of potassium and a calcium oxide (CaO) and / or magnesium (MgO), characterized in that the tri-superphosphate is in the form of granules and calcium and / or magnesium oxide in powder form.
2. - Amendement selon la revendication 1 , caractérisé par le fait que la granulométrie du tri-superphosphate (TSP) est inférieure ou égale à 2 mm.2. - Amendment according to claim 1, characterized in that the particle size of the tri-superphosphate (TSP) is less than or equal to 2 mm.
3. - Amendement selon la revendication 2, caractérisé par le fait que la granulométrie du tri-superphosphate (TSP) est comprise entre 0,5 et 1 ,5 mm.3. - Amendment according to claim 2, characterized in that the particle size of the tri-superphosphate (TSP) is between 0.5 and 1.5 mm.
4. - Amendement selon l'une quelconque des revendications 1 à 3, caractérisé par le fait que la granulométrie de l'oxyde de calcium (CaO) et/ou de magnésium (MgO) est inférieure ou égale à 2 mm.4. - Amendment according to any one of claims 1 to 3, characterized in that the particle size of the calcium oxide (CaO) and / or magnesium (MgO) is less than or equal to 2 mm.
5. - Amendement selon l'une quelconque des revendications 1 à 4, caractérisé par le fait que la source de potassium est du chlorure (KCI) ou du sulfate de potassium (K2SO4). 5. - Amendment according to any one of claims 1 to 4, characterized in that the potassium source is chloride (KCI) or potassium sulfate (K 2 SO 4 ).
6. - Procédé pour l'obtention d'un amendement selon l'une quelconque des revendications 1 à 5, caractérisé par le fait que l'on mélange à sec du tri- superphosphate (TSP) sous forme de granulés et de l'oxyde de calcium (CaO) et/ou de magnésium (MgO) sous forme de poudre et du chlorure de potassium (KCI) ou du sulfate de potassium (K2SO4). 6. - Method for obtaining an amendment according to any one of claims 1 to 5, characterized in that one mixes dry tri-superphosphate (TSP) in the form of granules and oxide calcium (CaO) and / or magnesium (MgO) in powder form and potassium chloride (KCI) or potassium sulfate (K 2 SO 4 ).
7. - Procédé selon la revendication 6, caractérisé par le fait que la granulométrie du tri-superphosphate (TSP) est inférieure ou égale à 2 mm.7. - Method according to claim 6, characterized in that the particle size of the tri-superphosphate (TSP) is less than or equal to 2 mm.
8. - Procédé selon la revendication 6, caractérisé par le fait que la granulométrie de l'oxyde de calcium (CaO) et/ou de magnésium (MgO) est inférieure ou égale à 2 mm8. - Method according to claim 6, characterized in that the particle size of the calcium oxide (CaO) and / or magnesium (MgO) is less than or equal to 2 mm
9. - Procédé selon la revendication 6, caractérisé par le fait que la granulométrie du chlorure de potassium (KCI) ou du sulfate de potassium (K2SO4) est inférieure ou égale à 1 mm.9. - Method according to claim 6, characterized in that the particle size of potassium chloride (KCI) or potassium sulfate (K 2 SO 4 ) is less than or equal to 1 mm.
10. - Procédé selon la revendication 6, caractérisé par le fait que le mélange est réalisé dans un mélangeur à deux vis inclinées. 10. - Method according to claim 6, characterized in that the mixing is carried out in a mixer with two inclined screws.
PCT/FR2001/001614 2000-05-23 2001-05-23 Soil builder in powder form and method for obtaining same WO2001090031A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU64020/01A AU6402001A (en) 2000-05-23 2001-05-23 Soil builder in powder form and method for obtaining same

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0006580A FR2809392B1 (en) 2000-05-23 2000-05-23 POWDER AMENDMENT AND PROCESS FOR OBTAINING SAME
FR00/06580 2000-05-23

Publications (1)

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WO2001090031A1 true WO2001090031A1 (en) 2001-11-29

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FR (1) FR2809392B1 (en)
WO (1) WO2001090031A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220388921A1 (en) * 2021-06-02 2022-12-08 Caete Participação E Administraçäo Eirelli Disaggregable granulated calcium and/or magnesium and potassium fertilizer and method of obtaining thereof

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4576626A (en) * 1982-05-13 1986-03-18 A. Nattermann & Cie Gmbh Foliage fertilizers
US5264017A (en) * 1988-01-06 1993-11-23 Martin Marietta Magnesia Specialties Inc. Inorganic reactive granulating binder and conditioner
US5997599A (en) * 1995-03-03 1999-12-07 Magic Green Corporation Soil conditioning agglomerates containing cement kiln dust

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4576626A (en) * 1982-05-13 1986-03-18 A. Nattermann & Cie Gmbh Foliage fertilizers
US5264017A (en) * 1988-01-06 1993-11-23 Martin Marietta Magnesia Specialties Inc. Inorganic reactive granulating binder and conditioner
US5997599A (en) * 1995-03-03 1999-12-07 Magic Green Corporation Soil conditioning agglomerates containing cement kiln dust

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220388921A1 (en) * 2021-06-02 2022-12-08 Caete Participação E Administraçäo Eirelli Disaggregable granulated calcium and/or magnesium and potassium fertilizer and method of obtaining thereof

Also Published As

Publication number Publication date
AU6402001A (en) 2001-12-03
FR2809392A1 (en) 2001-11-30
FR2809392B1 (en) 2003-06-13

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