EP3720832A1 - Procédé de fabrication d'un granulé d'engrais de nitrate d'ammonium ou de nitrate de calcium et d'ammonium, et granulés d'engrais fabriqués à l'aide de ce procédé - Google Patents

Procédé de fabrication d'un granulé d'engrais de nitrate d'ammonium ou de nitrate de calcium et d'ammonium, et granulés d'engrais fabriqués à l'aide de ce procédé

Info

Publication number
EP3720832A1
EP3720832A1 EP18814842.3A EP18814842A EP3720832A1 EP 3720832 A1 EP3720832 A1 EP 3720832A1 EP 18814842 A EP18814842 A EP 18814842A EP 3720832 A1 EP3720832 A1 EP 3720832A1
Authority
EP
European Patent Office
Prior art keywords
dolomite
calcination
filler
calcined
ammonium nitrate
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP18814842.3A
Other languages
German (de)
English (en)
Inventor
Helmut Gehrke
Stefan HELMLE
Sven Rüschhoff
Thorsten Wiemuth
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ThyssenKrupp AG
ThyssenKrupp Industrial Solutions AG
Original Assignee
ThyssenKrupp AG
ThyssenKrupp Industrial Solutions AG
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 ThyssenKrupp AG, ThyssenKrupp Industrial Solutions AG filed Critical ThyssenKrupp AG
Publication of EP3720832A1 publication Critical patent/EP3720832A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05C—NITROGENOUS FERTILISERS
    • C05C1/00—Ammonium nitrate fertilisers
    • C05C1/02—Granulation; Pelletisation; Stabilisation; Colouring
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05C—NITROGENOUS FERTILISERS
    • C05C1/00—Ammonium nitrate fertilisers
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05C—NITROGENOUS FERTILISERS
    • C05C3/00—Fertilisers containing other salts of ammonia or ammonia itself, e.g. gas liquor
    • C05C3/005—Post-treatment
    • 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
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05D—INORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C; FERTILISERS PRODUCING CARBON DIOXIDE
    • C05D5/00—Fertilisers containing magnesium
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
    • C05G5/00—Fertilisers characterised by their form
    • C05G5/10—Solid or semi-solid fertilisers, e.g. powders
    • C05G5/12—Granules or flakes

Definitions

  • the present invention relates to a process for producing a fertilizer granule comprising at least one ammonium salt and limestone and / or dolomite as filler, at least a portion of the limestone or dolomite being at least partially calcined prior to use in the fertilizer granules.
  • Nitrogen, phosphorus and sulfur compounds which are usually presented in the form of compounds containing ammonium and / or nitrate and / or sulphate and / or phosphate as well as in part a multiplicity of further components are to be regarded as indispensable for plant growth.
  • Nitrogen, phosphorus and sulfur compounds which are usually presented in the form of compounds containing ammonium and / or nitrate and / or sulphate and / or phosphate as well as in part a multiplicity of further components are to be regarded as indispensable for plant growth.
  • the most varied methods are known to the person skilled in the art, which are therefore to be mentioned only by way of example:
  • solutions, melts or suspensions are applied to an existing bed of particles, for example, by flowing around warm air, causing both a reduction in the proportion of water and the solidification of the applied material, resulting in growth of the granules contained in the particle bed.
  • a melt is forced through fine holes and dropped in countercurrent with e.g. Cooled air, whereby a crystallization of the material contained in the melt takes place.
  • the process takes place in so-called Prilltmen, wherein the crystallization of the material takes place in the free fall of, for example, dripped mass.
  • ammonium nitrate of low density for use as ANFO (ammonium nitrate fuel oil, an explosive) or for the production of ammonium nitrate-containing fertilizers, since this Process has environmental disadvantages but also in terms of hardness, grain size and storability against the granulation disadvantages.
  • ANFO ammonium nitrate fuel oil, an explosive
  • Fluidized bed spray granulation uses a stream of, for example, hot air to fluidize a particle bed.
  • a solution to be granulated is sprayed through nozzles from the top or bottom, whereby finely distributed droplets are applied to the fluidized and thoroughly mixed particles.
  • the said air flow in this case leads to a solidification of the perenniala Grande components, the water content is evaporated and discharged to a large extent on the exhaust stream.
  • a fluidized bed of particles is created by the impact arms positioned on two oppositely rotating shafts.
  • the melt of a substance or mixture to be granulated is introduced, mixed by the rotating beater arms and conveyed through the granulator, so that a granulated product results.
  • a filler in the form of limestone, dolomite or magnesite is added during granulation.
  • Limestone refers to a material that consists predominantly of CaC0 3 .
  • Dolomite refers to a material which consists predominantly of CaMg (C0 3 ) 2 .
  • Magnesite refers to a material which predominantly consists of MgC0 3 .
  • the fillers other ingredients, eg. As silicates, aluminates, aluminosilicates, etc, in lesser amount (less than 25 wt .-%, preferably less than 10 wt .-% and particularly preferably less than 5 wt .-%).
  • This filler basically fulfills three functions: (i) lowering the ammonium nitrate content to ⁇ 80% and thereby avoiding a detonatable product in the case of calcium ammonium nitrate (CAN);
  • filler material used e.g. dolomite versus limestone
  • the tolerance to filling material manifests itself in that a variety of limestones but also Dolomites of different origin and composition can be used.
  • the molar Ca / Mg ratio should be well above 1 in a range. Strictly speaking, this simplified consideration refers to the fact that the existing Ca and Mg species are present exclusively as carbonates (calcite, magnesite and / or dolomite).
  • calcite magnesite
  • dolomite dolomite
  • a higher calcite concentration is needed with increasing nitrogen concentration of the product.
  • This problem can be solved by adding filler materials (fillers) with a higher calcite content, such as the addition of limestone to dolomite.
  • fluidized-bed spray granulation for example, a certain amount of fluid air, a certain pressure loss across the perforated bottom plate and the particle bed, a defined temperature, a particular nozzle assembly required to produce various products in a production apparatus.
  • a fertilizer which has a layer structure, with a water-soluble granule core, which is coated with a first layer of a powdery slowly released material of calcined dolomite powder, followed by a second layer of one or more fertilizer substances the granule core selected from the group consisting of monoammonium phosphate, diammonium phosphate, potassium sulfate and potassium chloride and an additive selected from the group consisting of calcium magnesium phosphate fertilizer, calcium magnesium phosphate potassium fertilizer or a powdery fertilizer slowly releasing inorganic substance.
  • the water-soluble granules may include, among others, ammonium nitrate.
  • the fertilizer described in this document has a specific property, namely the slow release (so-called “slow release”) of the fertilizer substances, through which one wants to achieve that the plants over a longer period of time, for example, over the entire growing season, nutrients are supplied , The washing out of the nutrients contained in the fertilizer is prevented by certain substances and so a long-term fertilizer effect is achieved.
  • this known fertilizer contains phosphates as an essential ingredient.
  • RU 2015120152 A describes a fertilizer granulate based on ammonium nitrate, to which an additive magnesium oxide powder previously obtained by heating natural magnesite is added.
  • MgO should lead to a reduction of Ca (N0 3 ) 2 and Mg (N0 3 ) 2 , which should improve the hygroscopic properties of the product.
  • the object of the present invention is to provide a method for producing a fertilizer granules having the features of the aforementioned type, in which it is ensured that the filling material used in addition to the active component or components has sufficient reactivity.
  • the solution to the above object provides a method for producing a fertilizer granules of the type mentioned above with the features of claim 1.
  • the reactivity of the filling material is deliberately adjusted via its degree of calcination, to which fertilizer granules a filling material selected from the group consisting of calcined limestone, partially calcined limestone, calcined dolomite and partly calcined dolomite is added.
  • the present invention aims to produce a suitable "reaction window" of filler material to produce a product which can be granulated to the desired extent. This results in the particular advantage that the reactivity of normally "unusable” filler material, because this is largely unreactive, such as dolomite, can be targeted.
  • the present invention relates in particular to fertilizer granules in which the main component is ammonium nitrate or calcium ammonium nitrate or optionally a mixture of these two substances.
  • the main component is ammonium nitrate or calcium ammonium nitrate or optionally a mixture of these two substances.
  • major component is meant herein that the fertilizer granules contain 50% or more of this substance.
  • the fertilizer granules when based on ammonium nitrate (AN), contain at least 80% ammonium nitrate, preferably at least 90% ammonium nitrate.
  • the fertilizer granules according to the invention if it is based on ammonium nitrate, at least one filler selected from the group comprising calcined limestone, partially calcined limestone, calcined dolomite and partially calcined dolomite in a total amount up to 5 wt .-%, particularly preferred in a total amount of up to 4 wt .-% added to adjust the degree of calcination targeted.
  • fertilizer granulate according to the invention if it is based on ammonium nitrate, further additives, in particular an acid-releasing or sulphate-containing additives, in a total amount up to 10 wt .-%, preferably in a total amount up to 7.5 parts by weight. %, more preferably in a total amount of up to 5 wt .-%.
  • further additives in particular an acid-releasing or sulphate-containing additives, in a total amount up to 10 wt .-%, preferably in a total amount up to 7.5 parts by weight. %, more preferably in a total amount of up to 5 wt .-%.
  • the fertilizer granules according to the invention when based on calcium ammonium nitrate (CAN), contain a filler selected from the group comprising calcined limestone, partially calcined limestone, calcined dolomite, partially Calcined dolomite, calcined magnesite and partially calcined magnesite in a total amount up to 40 wt .-%, preferably in a total amount up to 30% by weight, particularly preferably in a total amount up to 25% by weight. %.
  • a filler selected from the group comprising calcined limestone, partially calcined limestone, calcined dolomite, partially Calcined dolomite, calcined magnesite and partially calcined magnesite in a total amount up to 40 wt .-%, preferably in a total amount up to 30% by weight, particularly preferably in a total amount up to 25% by weight. %.
  • calcium ammonium nitrate forms the main component of the fertilizer granules according to the invention, this preferably contains at least 60% by weight, in particular at least 70% by weight, particularly preferably at least 75% by weight, of calcium ammonium nitrate.
  • the remainder up to 100% by weight may in this variant optionally consist of the abovementioned fillers and / or additives.
  • a significant advantage of the present invention is that the feasibility of CAN / AN granulation is largely independent of the reactivity of the original filler to be used.
  • any filling material selected from the minerals dolomite, limestone-containing dolomite to limestone or magnesite can be used, since the reactivity is based on the idea underlying this invention, namely the upstream one (Partial) calcination can be set almost arbitrarily.
  • the granulation is preferably carried out in a Pug-Mill granulator.
  • the granules are built up in the Pug Mill granulator in such a way that a melt of the fertilizer substances, for example ammonium nitrate or calcium ammonium nitrate, and a filling material, in particular limestone and / or dolomite, is continuously added to the granules.
  • a melt of the fertilizer substances for example ammonium nitrate or calcium ammonium nitrate
  • a filling material in particular limestone and / or dolomite
  • Sub-grain can be returned to the granulator via sieves. For example, oversize may first be finely broken and then fed to the granulator.
  • the reactivity of the filling material is shown in the reaction of the carbonates of calcite, dolomite or magnesite with ammonium nitrate according to the reaction equation given below (1).
  • the reactivity of the filler decreases with decreasing calcite content, which means that in the case of pure dolomite (double salt of the formula CaMg (C0 3 )) there is hardly any reactivity of the filler.
  • the present invention proposes a prior calcination or at least a partial calcination of at least a portion of the filler material.
  • the calcination of dolomite proceeds via a two-stage process in which, as described in reaction equation (1), the magnesium content of dolomite is first calcined to form MgO, resulting in partial calcination of magnesium oxide and calcite (CaC0 3 ).
  • the thus pretreated dolomite shows a significantly increased reactivity, which can be set virtually arbitrarily in the process according to the invention by targeted control of the calcination.
  • the filler is added in the Pug-Mill granulation directly in the granulator or in an upstream mixer to the mixture of granules and ammonium nitrate melt or only to the melt.
  • the filler is preferably added to the feedstock stream.
  • the calcite content of the filling material is therefore crucial, since significantly calcite (CaC0 3 ) reacts with the ammonium nitrate in the granulator according to the following chemical:
  • the calcite can react with any existing free acids (by additives, for example) and thus buffer the acids. If (partially) calcined filler material is used, it is also possible for the oxides to be present, which react with the ammonium nitrate according to the following equation
  • Equations 2 to 4 apply to the same extent to the corresponding magnesium species (magnesite and magnesium oxide).
  • the calcium nitrate or magnesium nitrate which is formed by reaction of the ammonium nitrate with the filler material (equation (2)), has on the one hand the above-mentioned positive effect of improving granulability on the end product, but on the other hand can lead to high concentrations the storability deteriorates due to the hygroscopic properties.
  • sulfate-containing additives are added and / or the product is provided with a coating.
  • the sulfate causes calcium sulfate to form, which in turn has significantly weaker hygroscopic properties than the calcium nitrate, thereby achieving an improvement in shelf life.
  • the reactivity of the filler according to equation (2) must be higher with increasing total nitrogen concentration.
  • total N 22 - 34 wt .-%) this can lead to the conflict that either too high Ca (N0 3 ) 2 contents and thus a poor storability and as a side effect to low total N -Contents (see equation (2)) result (filler too reactive) or that no or only a poor granularity (ie too small grain size spectrum) is achieved (filler unreactive). Both processes can in the worst case lead to a collapse of the process and thus of production.
  • At least a portion of the filling material is preferably added to the process according to the invention in a suitable calcination and annealed until a suitable degree of calcination and thus a suitable reactivity is achieved. Even with the use of an originally unreactive filler material such as dolomite, a reactivity necessary for each process condition can be set.
  • the degree of calcination is defined as the ratio of the mineral composition of CaC0 3 : CaO: CaMg (C0 3 ) 2 : MgC0 3 : MgO.
  • a subset of (partially) calcined fillers may be mixed in a particular ratio with untreated filler material.
  • the determination and adjustment of the calcining temperature suitable for this process may be carried out by suitable analytical methods, e.g. Thermogravimetry or similar procedures happen.
  • the setting of the desired degree of calcination can then be checked, for example, by (quantitative) powder diffractometry and / or quantitative carbonate determination and / or loss on ignition or a combination of the previously mentioned methods and determination of the associated reactivity.
  • Calcium and magnesium contents can be determined by suitable analytical methods such as X-ray fluorescence spectroscopy, atomic absorption spectrometry (AAS), inductively coupled plasma (ICP) and complexometric titration.
  • suitable analytical methods such as X-ray fluorescence spectroscopy, atomic absorption spectrometry (AAS), inductively coupled plasma (ICP) and complexometric titration.
  • the overall reactivity of the filler material is determined by heating a defined amount of ammonium nitrate to a defined temperature (up to the melt) and adding a defined amount of the desired filler material (and optionally additives). The reaction melt is then left at the temperature for a defined time and then cooled. Following is the resulting from equations 2 to 4 Ca (N0 3 ) 2 and / or Mg (N0 3 ) 2 with a suitable solvent from the cooled melt extracted and determined by complexometric titration. The total reactivity (R fiir ) according to Equation 5 thus describes the percentage molar ratio of reacted to unreacted filler material.
  • Another desirable side effect is that this pretreatment of dolomite (or limestone) oxidizes unwanted organic components and thus can be removed as completely as possible. Because of high organic carbon shares loaded and thus for safety reasons actually unusable dolomites or limestones are thus used in the invention.
  • the calcining takes place at a temperature of less than 800 ° C, preferably at a temperature of less than 760 ° C.
  • temperatures in the range of about 720 ° C to about 760 ° C can be selected.
  • the degree of calcination is determined by the temperature and / or the duration of the calcination of the filling material. The higher the temperature, the higher the calcination degree is. Also, in general, the degree of calcination increases with the time of calcination, but after a certain period of time, the calcination process is usually completed, so that further calcination no longer results in a substantial increase in the reactivity of the calcined filler.
  • calcination may be carried out for a period of about 2 minutes to 24 hours, preferably for a period of about 30 minutes to about 4 hours, particularly when the above-mentioned preferred temperature ranges are used.
  • the duration of the calcination may, of course, apart from the calcination temperature, also be dependent on the type of mineral used and the calcination process.
  • a filler dolomite (CaMg (C0 3 ) 2 ), wherein the duration of the calcination of dolomite, associated with its degree of calcination and its increasing with the duration of calcination reactivity over the determinable example by mineralogical content on carbonates and the corresponding oxides can control.
  • the (Partial) calcination of dolomite is converted in a first stage, the magnesium content in the dolomite (partially) in magnesium oxide and calcite (CaC0 3 ) released, so that the magnesium oxide content and the proportion of calcite increases with progressive calcination.
  • the procedure may be such that the filler is calcined until such a proportion of the dolomite originally contained has been converted to calcite (CaCO 3 ) such that a calcite content in the filler of at least about 20% by weight, preferably at least about 40 wt .-% results.
  • the original calcite content (CaCO 3 content) of the mineral used can serve as a further parameter for the degree of calcination and the necessary period of calcination of the filling material, because if this is comparatively high even before the calcination, this is Filler material accordingly more reactive and therefore must be calcined only to a lesser extent in order to obtain a desired degree of reactivity.
  • the original calcite content of the mineral can be determined by suitable analytical methods such as powder diffractometry.
  • the reactivity of the filling material used can also be controlled by using, on the one hand, a proportion of non-calcined dolomite as filling material and also using a proportion of calcined reactive dolomite as the filling material. Since these proportions of less reactive untreated dolomite and more reactive calcined dolomite can be virtually mixed as desired, there is the advantage, for example, that initially less reactive dolomite rock can be used by increasing the proportion of reactive calcined dolomite. In this way, regardless of the available starting material, it is always possible to set a desired total reactivity of the total filling material used in the fertilizer granules.
  • a mixture of unreactive and partially calcined dolomite is used as filling material
  • a dolomite as part of the filling material, which in a suitable Temperature has been calcined for such a period of time that the filler has a total reactivity of at least 2 mol%, preferably of at least 20 mol%.
  • a mixture of limestone and dolomite as filling material, the limestone having a higher calcite content and thus a higher reactivity, so that in this variant of the process the total content of the filling material is also indicated Can adjust calcite targeted.
  • the respective proportions of the minerals used are mixed in such a ratio that a desired total content of the filling material results in calcite and the associated overall reactivity of the filling material.
  • the present invention further provides a fertilizer granules comprising ammonium nitrate or calcium ammonium nitrate as the main component and at least a portion of at least partially calcined limestone and / or dolomite filler material, the reactivity of the filler material being deliberately adjusted via its degree of calcination by the method described above
  • Figure 1 is a graphical representation of a thermogravimetric analysis of a two-stage calcination process
  • Figure 2 is a graphical representation of a thermogravimetric analysis of a dolomite under "atmospheric" conditions
  • FIG. 3 shows a graph of the contents of dolomite, calcite, periclase and calcium oxide (and of the hydration product calcium hydroxide) as a function of the calcining conditions.
  • Dolomite "deacidification” in the calcination process via a two-stage process wherein in a first step, initially substantially “MgC0 3 " portion of the crystal structure deacidified, after which MgO and CaC0 3 is formed.
  • the CaC0 3 decomposes to give the completely calcined dolomite with the oxidic forms MgO and CaO.
  • this process is graphically represented by a thermogravimetric analysis. In the upper figure, the ordinate represents the mass of a sample in relation to the mass at the beginning of the analysis, which calcines in a crucible has been. The curve therefore starts at 100%.
  • FIG. 1 Two further curves for this experiment are shown in FIG. 1, wherein the ordinate represents the heat flow in watts / g and the abscissa shows the time duration of the experiment and the rising temperature, starting at room temperature. It can be seen that after a heating time of about 75 minutes, a temperature of about 700 ° C was reached and the heat flow now increases sharply (increase in the negative heat flow, ie increase in the endothermic range), since the decomposition of the carbonates to an endothermic process in which heat is consumed.
  • FIG. 2 shows a further thermogravimetric analysis of a dolomite under atmospheric conditions, wherein it can be seen here that at low partial pressure of CO 2 both deacidification stages can merge into one another, for which reason the calcination step is preferably carried out under CO 2 atmosphere.
  • Table 1 shows the result of a quantitative powder diffractometry analysis (XRD analysis) of a dolomite sample in the original state and according to different degrees of calcination.
  • X-ray fluorescence analysis shows that the chemical composition remains as expected (within the uncertainty of the method) as a percentage of the change in the loss of ignition (due to the previous partial calcination deacidification) (see CaO / MgO ratio).
  • FIG. 3 shows the respective content of a rock having an initial dolomite content of 99.6%, depending on different calcination conditions
  • Treatment temperature and duration of treatment shown. It can be seen there that the percentage by mass of dolomite decreases by the treatment and that of calcite increases. After treatment at 750 ° C. for one hour, the proportion of calcite is higher than when treated for only 30 minutes at a lower temperature of 725 ° C. After four hours of treatment at 750 ° C no dolomite is present and the proportion of calcium oxide and its hydration product calcium hydroxide has increased. It can also be seen that the proportion of magnesium oxide increases with increasing temperature and duration of treatment.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Pest Control & Pesticides (AREA)
  • Fertilizers (AREA)

Abstract

La présente invention concerne un procédé pour la fabrication d'un granulé d'engrais, comprenant au moins un sel d'ammonium ainsi que du calcaire et/ou de la dolomite et/ou de la magnésite en tant que matière de charge, au moins une partie du calcaire ou de la dolomite ou de la magnésite ayant été au moins partiellement calcinée avant utilisation dans le granulé d'engrais. L'invention propose d'ajuster d'une manière ciblée la réactivité du matériau de charge, par l'intermédiaire de son degré de calcination et/ou de sa proportion de calcite. Si l'on utilise par exemple de la dolomite en tant que matériau de remplissage, le dioxyde de carbone va se dissocier du minéral sous l'effet de la calcination. La calcination est alors un processus en deux étapes, dans lequel la dolomite est d'abord convertie en périclase (MgO) et en calcite (CaC03), la calcite étant également convertie, à une température plus élevée, en oxyde de calcium sous l'effet d'une décomposition et d'un dégagement de dioxyde de carbone. La figure 3 présente les teneurs en dolomite, en calcite, en périclase et en oxyde de calcium (ainsi que de son produit d'hydratation hydroxyde de calcium) en fonction de différentes conditions de calcination.
EP18814842.3A 2017-12-04 2018-12-03 Procédé de fabrication d'un granulé d'engrais de nitrate d'ammonium ou de nitrate de calcium et d'ammonium, et granulés d'engrais fabriqués à l'aide de ce procédé Withdrawn EP3720832A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102017221789.8A DE102017221789A1 (de) 2017-12-04 2017-12-04 Verfahren zur Herstellung eines Düngemittelgranulats
PCT/EP2018/083276 WO2019110470A1 (fr) 2017-12-04 2018-12-03 Procédé de fabrication d'un granulé d'engrais de nitrate d'ammonium ou de nitrate de calcium et d'ammonium, et granulés d'engrais fabriqués à l'aide de ce procédé

Publications (1)

Publication Number Publication Date
EP3720832A1 true EP3720832A1 (fr) 2020-10-14

Family

ID=64606976

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18814842.3A Withdrawn EP3720832A1 (fr) 2017-12-04 2018-12-03 Procédé de fabrication d'un granulé d'engrais de nitrate d'ammonium ou de nitrate de calcium et d'ammonium, et granulés d'engrais fabriqués à l'aide de ce procédé

Country Status (4)

Country Link
US (1) US20200346985A1 (fr)
EP (1) EP3720832A1 (fr)
DE (1) DE102017221789A1 (fr)
WO (1) WO2019110470A1 (fr)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB828430A (en) 1950-06-12 1960-02-17 Mini Of Supply Improvements in or relating to the production of calcium cyanamide
US2727809A (en) * 1953-04-03 1955-12-20 Harold W Lust Method of and apparatus for converting bulk fertilizer into pellets
SU861346A1 (ru) * 1978-12-06 1981-09-07 Предприятие П/Я А-1676 Способ стабилизации гранул аммиачной селитры
EP1772444A1 (fr) * 2005-10-10 2007-04-11 Solutia Europe N.V./S.A. Charge stabilisée et engrais la contenant
CN103172453B (zh) 2013-04-23 2014-09-10 济南乐喜施肥料有限公司 一种缓释复合肥料及其制备方法
RU2614874C2 (ru) * 2015-05-27 2017-03-30 Акционерное общество "Минудобрения" (АО "Минудобрения") Способ получения известково-аммиачной селитры

Also Published As

Publication number Publication date
DE102017221789A1 (de) 2019-06-06
US20200346985A1 (en) 2020-11-05
WO2019110470A1 (fr) 2019-06-13

Similar Documents

Publication Publication Date Title
DE3008891C2 (de) Verfahren zur Herstellung von stabilisierten, Ammoniumnitrat enthaltenden Körnern
DE112012002980B4 (de) Verfahren zur Herstellung von hochreinem Ammoniumsulfat und Calcit unter Verwendung von Gips
EP3856705B1 (fr) Granulés à base d'urée et de polyhalite calcinée
DE69913193T2 (de) Verfahren zur Herstellung eines Düngemittelverbundgranulats
EP0427704A1 (fr) Procédé pour la fabrication de granulat céramique poreux, le produit fabriqué et l'application de produit
EP3038995B1 (fr) Composition d'un composé sulfate de magnésium-urée
EP2178809B1 (fr) Engrais calcaire à base d'azote et de soufre et son procédé d'obtention
DE60016673T2 (de) Verfahren zur Herstellung von granuliertem Ammoniumsulfat
EP3704081A1 (fr) Procédé pour produire des granulats contenant du potassium, du magnésium et du sulfate
DE102017010086A1 (de) Granulate, enthaltend Polyhalit
DE3852398T2 (de) Ammonium sulfat-granulat und verfahren zur herstellung.
EP3720832A1 (fr) Procédé de fabrication d'un granulé d'engrais de nitrate d'ammonium ou de nitrate de calcium et d'ammonium, et granulés d'engrais fabriqués à l'aide de ce procédé
EP3704080A1 (fr) Procedé pour la production de granulés d'engrais contenant de la polyhalite calcinée
EP0652192B1 (fr) Procédé de préparation d'un matériau fertilisant et d'amélioration du sol
DE1592685C3 (de) Verfahren zur Herstellung von Glühphosphat
DE102019006367A1 (de) Staubbindemittel für Düngemittel
WO2017081264A1 (fr) Mélange d'engrais et procédé de fabrication de celui-ci
DE3017609A1 (de) Verfahren und vorrichtung zur herstellung von granuliertem mehrstoffduenger
DE102019008878A1 (de) Düngemittelgranulate, enthaltend Stickstoff, Kalium und Phosphor
DE102019006059A1 (de) Kugelförmige Düngemittelgranulate, enthaltend Magnesium, Sulfat und Harnstoff
DE2262819C3 (de) Verbessertes Verfahren zur Herstellung von Alkaliglühphosphaten
DE1592609B1 (de) Verfahren zur Herstellung eines granulierten, schwefel und gegebenenfalls kalisalzhaltigen Phosphatdüngemittels
EP0237802A1 (fr) Procédé pour la préparation de sulfate de calcium sous la forme de l'anhydrite et de sulfates de calcium durcissant
AT217060B (de) Verfahren zur Herstellung komplexer Dünger
EP4008705A1 (fr) Procédé de fabrication de granulés contenant du potassium, du magnésium et du sulfate

Legal Events

Date Code Title Description
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: UNKNOWN

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE

PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20200706

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

RIN1 Information on inventor provided before grant (corrected)

Inventor name: HELMLE, STEFAN

Inventor name: GEHRKE, HELMUT

Inventor name: WIEMUTH, THORSTEN

Inventor name: RUESCHHOFF, SVEN

DAV Request for validation of the european patent (deleted)
DAX Request for extension of the european patent (deleted)
RAP3 Party data changed (applicant data changed or rights of an application transferred)

Owner name: THYSSENKRUPP AG

Owner name: THYSSENKRUPP INDUSTRIAL SOLUTIONS AG

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20220701