Classifications

• • C—CHEMISTRY; METALLURGY
  • C05—FERTILISERS; MANUFACTURE THEREOF
  • C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
  • C05F11/00—Other organic fertilisers
  • C05F11/02—Other organic fertilisers from peat, brown coal, and similar vegetable deposits
• • 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
• • C—CHEMISTRY; METALLURGY
  • C05—FERTILISERS; MANUFACTURE THEREOF
  • C05B—PHOSPHATIC FERTILISERS
  • C05B7/00—Fertilisers based essentially on alkali or ammonium orthophosphates
• • 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
• • C—CHEMISTRY; METALLURGY
  • C05—FERTILISERS; MANUFACTURE THEREOF
  • C05D—INORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C; FERTILISERS PRODUCING CARBON DIOXIDE
  • C05D1/00—Fertilisers containing potassium
• • 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
  • C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
  • C05F1/00—Fertilisers made from animal corpses, or parts thereof
  • C05F1/007—Fertilisers made from animal corpses, or parts thereof from derived products of animal origin or their wastes, e.g. leather, dairy products
• • C—CHEMISTRY; METALLURGY
  • C05—FERTILISERS; MANUFACTURE THEREOF
  • C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
  • C05F11/00—Other organic fertilisers
• • C—CHEMISTRY; METALLURGY
  • C05—FERTILISERS; MANUFACTURE THEREOF
  • C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
  • C05F3/00—Fertilisers from human or animal excrements, e.g. manure
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
  • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
  • Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
  • Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
  • Y02A40/20—Fertilizers of biological origin, e.g. guano or fertilizers made from animal corpses
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
  • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
  • Y02P20/00—Technologies relating to chemical industry
  • Y02P20/141—Feedstock
  • Y02P20/145—Feedstock the feedstock being materials of biological origin

Definitions

• the present invention relates to a process for the continuous production of fertilizers, in particular with a high content of organic matter, in the form of granules.
• Fertilizers are often essential in crops to ensure or improve plant nutrition, as well as the physical, chemical and biological properties of soils.
• These fertilizers can come in various forms, liquid, powdery or even solid, which vary depending on the spreading technique used.
• spreading by seed drill requires fertilizing materials in solid form, such as for example granules, obtained by granulation of the starting raw materials, or pellets and plugs, obtained by extrusion.
• One of the problems encountered by users of solid fertilizer materials spread by seed drill is the mechanical resistance, in particular the abrasion resistance, of granules, pellets and plugs.
• the granules obtained have a high moisture content which does not allow a good granulation yield. Furthermore, the proportion of organic matter in these granules remains low.
• the Applicant has surprisingly discovered that by choosing very specific raw materials and by maintaining a specific humidity level throughout the stages of the process, that is to say, during the mixing of the raw materials then during granulation, and within the products obtained, and so as to be able to recycle a part of these products, it was possible to carry out a process for producing fertilizing materials in the form of granules continuously, in particular comprising a high content of organic matter , said process having a particularly high granulation yield.
• the present invention relates to a method for producing fertilizer materials in the form of granules, in particular comprising a high content of organic matter, having a particularly high granulation yield.
• granulation yield is meant in the sense of the present application the percentage by dry weight of the granulated fertilizer having the desired size in the material after drying, but before sieving.
• the present invention relates to a process for the continuous production of fertilizing materials in the form of granules comprising the following steps: - a 0 ) a mixture is produced comprising lignite, magnesia oxide, at least one nutritive compound chosen among nitrogen-based nutrients, phosphorus-based nutrients, potassium-based nutrients, chain-based nutrients carbonaceous of vegetable and / or animal origin and their mixtures, and the recycled granules from step e °), - b °) granulation is carried out in an acid medium in the presence of water, superheated steam, d sulfuric acid and of the mixture obtained in a °) until granules are obtained having a moisture content ranging from 3 to 19% by weight, relative to the weight of the granules, - c °) the granules obtained are dried in b °) until a humidity level ranging from 0.1 to 15% by weight is obtained, relative to the weight of the granules, - d a
• the present invention also relates to a fertilizing material in the form of granules, capable of being obtained according to the method described above.
• the process according to the invention makes it possible in particular to obtain organic amendments with a high content of organic matter in the form of granules, as well as organic, organo-mineral and mineral fertilizers in the form of granules which are perfectly resistant to handling and to '' subsequent spreading.
• nutritive compound is meant within the meaning of the present application any mineral or organic chemical compound comprising at least one fertilizing element, such as for example, nitrogen, phosphorus or potassium, or at least one carbon chain of origin. vegetable or animal.
• granules is meant, within the meaning of the present invention, pearl granules, substantially spherical, of homogeneous composition and size, not crumbling during storage and handling.
• these granules have a hardness, measured using the Versatest® test bench compression method, ranging from 5 to 15 kg / cm 2 .
• these granules have an average particle size diameter ranging from 2.6 mm to 4.5 mm.
• the term “granule” means a homogeneous agglomerate produced in the granulator, substantially spherical, having any possible size.
• the term “recycled granule” means a granule leaving the dryer and arriving at the screen or sieving and not having the size required for packaging, storage and spreading in the form of granules.
• the term “fertilizing materials” means fertilizers, organic amendments and, in general, all products the use of which is intended to ensure or improve the nutrition of plants, as well as physical, chemical and biological properties of soils.
• organic amendment is meant within the meaning of the present application, fertilizing materials composed mainly of carbonaceous combinations of plant origin, oxidized, fermented or fermentible, intended for the maintenance or the replenishment of the stock of organic matter in the soil and the content of each of the fertilizing elements N, P2O 5 and K 2 O is strictly less than 3% by weight relative to the weight of the organic amendment.
• fertilizing materials composed mainly of carbonaceous combinations of plant origin, oxidized, fermented or fermentible, intended for the maintenance or the replenishment of the stock of organic matter in the soil and the content of each of the fertilizing elements N, P2O 5 and K 2 O is strictly less than 3% by weight relative to the weight of the organic amendment.
• fertilizing materials means fertilizing materials whose main function is to provide plants with elements directly useful for their nutrition, such as major fertilizing elements, secondary fertilizing elements and trace elements. Fertilizers include all mineral fertilizers, organo-mineral fertilizers and organic fertilizers.
• fertilizers is meant fertilizers based on mineral nitrogen, phosphorus, potassium and / or their mixtures.
• organo-mineral fertilizers is meant fertilizers based on mineral nitrogen, organic nitrogen, phosphorus, potassium and / or their mixtures.
• organic fertilizers is meant fertilizers obtained from products or by-products of animal and / or vegetable origin containing organic nitrogen and without incorporation of mineral matter.
• a mixture is produced comprising lignite, magnesium oxide, at least one nutritive compound and the recycled granules originating from stage e) of the continuous process according to invention and which will be described later.
• Lignite is a natural compound comprising clays, humic acid, fulvic acid and noble organic materials and humous. Lignite comes from the prolonged decomposition, over several million years, of plants. Preferably, lignite has a carbon: oxygen ratio of the order of 3: 1. Lignite is commercially available in various forms. Preferably, lignite will be used in powder form. Preferably, the lignite used in the present invention comprises a clay content ranging from 15% to 25%, and preferably about 20%, by weight relative to the weight of the lignite. Preferably, the content of humic acid and of fulvic acid in the lignite ranges from 15% to 35%, by weight, relative to the weight of the lignite.
• the lignite is preferably introduced into the mixture in the form of a powder with an average particle size diameter ranging from 0.1 to 10 mm.
• the lignite used preferably has a moisture content ranging from 15% to 20%, by weight, relative to the weight of the lignite.
• the lignite is introduced into the mixture at a content ranging from 150 to 500 kg / t, and more preferably from 250 to 300 kg / t in the mixture.
• the magnesium oxide used in the present invention is preferably in the form of a finely ground powder.
• the magnesia oxide is preferably introduced into the mixture at a content ranging from 20 to 60 kg / t, preferably from 30 to 35 kg / t.
• the nutrient compounds are preferably chosen from nitrogen-based nutrient compounds, phosphorus-based nutrient compounds, potassium-based nutrient compounds, nutrient compounds based on carbon chains of plant or animal origin and mixtures thereof.
• the nitrogen-based nutrient compounds are preferably chosen from urea, ammonium nitrate, ammonium phosphates, ammonia sulfate, ammonia, in the form of gaseous ammonia, ammonia liquid or aqueous solutions of ammonia, organic materials containing organic nitrogen and mixtures thereof.
• the phosphorus-based nutritive compounds are preferably chosen from phosphoric acid, ammonium phosphates, such as diammonium phosphate or monoammonium phosphate, simple superphosphate, double superphosphate, triple superphosphate, phosphates potassium and mixtures thereof.
• the potassium-based nutritive compounds are preferably chosen from potassium sulphate, potassium chloride, nitrate of potassium, potassium hydroxide, potassium phosphates and mixtures thereof.
• the mixture of step a °) comprises at least one nutritive compound based on carbon chains of plant and / or animal origin.
• the nutritive compound or compounds based on carbon chains of plant and / or animal origin are preferably chosen from feather meal, green waste, composted organic matter of plant origin, aged pine bark, oil cakes. coffee, soy and / or cocoa, manure, urban sludge and mixtures thereof.
• the hydrolyzed feather meal used is treated at 3 bars at 140 ° C for 20 min, in accordance with EC regulation 1774/2002. More preferably, the feather meal used for the present invention is treated at 100 ° C for 8 to 9 hours.
• this feather meal is a mixture of hydrolyzed proteins.
• Nutrient compounds based on nitrogen, phosphorus or potassium preferably have a moisture content ranging from 3 to 10% by weight, relative to the total weight of these compounds.
• the nutritive compounds based on carbon chains of plant and / or animal origin preferably have a moisture content ranging from 15 to 60% by weight, relative to the total weight of these compounds.
• the nutritive compounds are introduced into the mixture at a content preferably ranging from 500 kg / t to 850 kg / t, preferably from 700 to 750 kg / t.
• the nutritive compounds are preferably weighed in the form of powders on a weighing belt. The mixture is then introduced into the granulator using a hopper.
• the mixture is granulated in an acid medium in the presence of water, superheated steam and sulfuric acid until granules with a moisture content ranging from from 3 to 19% by weight, and preferably from 3 to 15% by weight, relative to the weight of the granules.
• the granulation is preferably carried out on a granulator plate equipped with an superheated steam injector and spraying ramps with sulfuric acid and water.
• the granulator is preferably a tray granulator, for example of the Heirich® type with dimensions 2.92 m in diameter and 1.07 m in depth.
• the table turns preferably to a speed of 14 rpm.
• the product generally has a residence time of approximately 7 to 10 minutes in the granulator.
• sulfuric acid at concentrations ranging from 30 to 70% by weight is introduced in amounts ranging from 3 to 15% by weight relative to the weight of the mixture present in the granulator, in spray form, for example using the spray bars.
• the presence of sulfuric acid allows the creation in situ of magnesium sulfate by reaction with magnesia oxide. This reaction allows a better agglomeration of the product and the recrystallization of magnesium sulfate during drying allows a better resistance of the product during storage.
• magnesium sulfate is added during granulation.
• this magnesium sulfate is added in the form of kieserite, or of a mixed salt of magnesium and / or potassium, such as patent kali, korn kali, or even kainite.
• kieserite is introduced in an amount ranging from 4 to 15% by weight, relative to the weight of the mixture present in the granulator.
• patent kali is introduced in an amount ranging from 5 to 15% by weight, relative to the weight of the mixture present in the granulator.
• the patent kali being an organic product, its use allows obtaining a finished product usable in organic farming.
• Superheated steam preferably at a temperature ranging from 120 ° C to 160 ° C and preferably around 140 ° C, is also introduced into the granulator together with sulfuric acid using a injector.
• This water vapor can be introduced at different points in the granulator. It is preferably introduced in an amount of about 500 kg / hour.
• This water vapor is generally used to dissolve the kieserite or the mixed salt of magnesium and / or potassium and the other mineral salts present in the mixture.
• Water is also introduced along with the sulfuric acid and the superheated steam using spray bars. This water is generally introduced at room temperature and in an amount ranging from 100 to 500 liters per hour. During the granulation stage, granules are produced.
• These granules generally have an average particle size diameter ranging from 0.8 to 8 mm. At the outlet of the granulator, these granules have preferably a humidity level ranging from 3 to 19% by weight, and more preferably from 3 to 15% by weight, relative to the weight of the granules.
• the fertilizing material produced in the form of granules is a mineral, organo-mineral or organic fertilizer
• the granules preferably have a moisture content ranging from 3 to 7% by weight, relative to the weight of the granules.
• the granules When the fertilizing material produced in the form of granules is an organic amendment, the granules preferably have a moisture content ranging from 15 to 19% by weight, relative to the weight of the granules.
• the pH of the granules, at the outlet of the granulator preferably ranges from 2.2 to 7, more preferably from 2.8 to 6.8.
• the temperature of the granules preferably ranges from 40 ° C to 90 ° C, and more preferably is around 75 ° C.
• the granules are dried until a moisture content ranging from 0.1 to 15% by weight is obtained, relative to the weight of the granules.
• Drying is carried out in a dryer using hot air.
• This dryer can for example have a diameter of 1.82 m and a length of 15 m, including a useful length of 14 m, a rotation speed of 8.33 rpm and a flow of hot air of about 28 000 Nm 3 / h.
• the temperature of the hot air entering the dryer preferably ranges from 150 ° C to 400 ° C, and preferably from 180 ° C to 350 ° C.
• the air temperature at the outlet of the dryer preferably ranges from 40 ° C to 110 ° C, preferably from 75 ° C to 95 ° C.
• the drying time can vary from 20 to 45 minutes depending on the yield of the granulation.
• the granules have a moisture content ranging from 0.1 to 15%, by weight relative to the weight of the granules.
• the granules preferably have a moisture content ranging from 0.1 to 2.5%, by weight, relative to the weight of the granules.
• the granules have a moisture content ranging from 7 to 15%, by weight, relative to the weight of the granules.
• the granules have, at the end of the drying step, an organic matter content ranging from 6 to 70% by weight, preferably from 50 to 70% by weight , relative to the weight of the granules.
• the granules obtained in the previous step are sieved. All of the dried granules are preferably subjected to a first sieving on a sieve the grid of which has square meshes of 5.5 mm ⁇ 5.5 mm. The oversized granules, that is to say those which do not pass through this grid, are separated. The granules having passed this first sieving are subjected to a second sieving on a sieve, the grid of which has rectangular meshes of 2.7 mm ⁇ 50 mm. The granules which do not pass this grid preferably have an average particle size diameter ranging from 2.6 mm to 4.5 mm.
• granules produced by the process according to the invention are packaged and stored for sale as a mineral, organo-mineral or organic fertilizer or organic amendment.
• the undersized granules, that is to say those passing this second sieve are also separated.
• the oversized granules, that is to say not passing the first sieve, and the undersized granules, that is to say passing the second sieve are recycled and reintroduced in step a °) of the process according to the invention.
• the recycled granules, comprising all of the oversized and undersized granules have a moisture content ranging from 0.1 to 15% by weight, relative to the weight of the granules.
• the oversized granules are ground before being recycled in step a °) of the process according to the invention. Thanks to the particular moisture content of the granules obtained during granulation, the granulation yield of the process according to the invention is particularly high. Preferably, this granulation yield ranges from 30% to 70% and preferably from 50% to 70%.
• 300 kg / t of lignite, 59 kg / t of urea, 584 kg / t of ammonium sulphate, 31 kg / t of finely ground magnesia are available. These materials are weighed on a weighing belt, then mixed in a hopper and introduced into a Heirich® granulator. Granulation is carried out in an acid medium. For this, 100 kg / t of sulfuric acid at 70% by weight are added. Water vapor is introduced at about 140 ° C in an amount of about 500 kg / hour. Water is also introduced in an amount of about 100 liters. At the outlet of the granulator, the pH of the granules ranges from 5 to 6.5 and is preferably around 5.7.
• the temperature of the granules at the outlet of the granulator ranges from 55 ° C to 80 ° C, and is preferably around 75 ° C.
• the granules are then dried in a dryer.
• the inlet temperature of the dryer ranges from 150 ° C to 350 ° C, and is preferably 180 ° C.
• the outlet temperature of the dryer ranges from 55 ° C to 95 ° C and is preferably 80 ° C.
• the granules have a moisture content ranging from 0.1 to 1.5%, and is preferably 0.5%, by weight, relative to the weight of the granules. After sieving, a simple nitrogen fertilizer is obtained in the form of granules.
• the granules obtained are particularly resistant to storage and subsequent handling. Such granules have sufficient strength to be used in agricultural spreading machines.
• the particle size distribution of the granules ranges from 2.6 to 4.5 mm.
• the hardness, measured using the Versatest® test bench compression method, is at least 6 kg / cm 2 .
• the granulation yield ranges from 30% to 40%.
• the pH of the granules ranges from 2.2 to 4.5 and is preferably around 2.8.
• the temperature of the granules at the outlet of the granulator ranges from 55 ° C to 80 ° C, and is preferably around 75 ° C.
• the granules have a moisture content ranging from 4 to 6%, and preferably 5%, by weight, relative to the weight of the granules.
• the granules are then dried in a dryer.
• the inlet temperature of the dryer ranges from 250 ° C to 400 ° C, and is preferably 350 ° C.
• the outlet temperature of the dryer ranges from 75 ° C to 110 ° C and is preferably 95 ° C.
• the granules have a moisture content ranging from 0.5 to 4%, and preferably 2%, by weight, relative to the weight of the granules.
• organo-mineral fertilizer N is obtained, known as organo-mineral fertilizer N in the form of granules.
• the granules obtained are particularly resistant to storage and subsequent handling.
• the particle size distribution of the granules ranges from 2.6 to 4.5 mm.
• the hardness, measured using the Versatest® test bench compression method, is at least: 6 kg / cm 2 .
• the granulation yield ranges from 50% to 70%.
• EXAMPLE 3 We have 250 kg / t of lignite, 78 kg / t of ammonium phosphate, 384 kg / t of hydrolysed feather meal (in accordance with CE regulation 1774/2002), 169 kg / t of ammonium sulphate, 76 kg / t simple superphosphate at 18% by weight, 31 kg / t of magnesia oxide. These materials are weighed on a weighing belt, mixed in a hopper and introduced into a Heirich® granulator. Granulation is carried out in an acid medium. For this, 100 kg / t of sulfuric acid at 70% by weight are added. Water vapor is introduced at about 140 ° C in an amount of about 500 kg / hour.
• Water is also introduced in an amount of about 100 liters.
• the pH of the granules ranges from 2.2 to 4.5 and is preferably around 2.8.
• the temperature of the granules at the outlet of the granulator ranges from 55 ° C to 80 ° C, and is preferably around 75 ° C.
• the granules have a moisture content ranging from 4 to 6%, and preferably 5%, by weight, relative to the weight of the granules.
• the granules are then dried in a dryer.
• the inlet temperature of the dryer ranges from 250 ° C to 400 ° C, and is preferably 350 ° C.
• the outlet temperature of the dryer ranges from 75 ° C to 110 ° C and is preferably 95 ° C.
• the granules have a moisture content ranging from 0.5 to 4%, and preferably 2%, by weight, relative to the weight of the granules.
• organo-mineral NP fertilizer is obtained in the form of granules.
• the granules obtained are particularly resistant to storage and subsequent handling.
• the particle size distribution of the granules ranges from 2.6 to 4.5 mm.
• the hardness, measured using the Versatest® test bench compression method, is at least 6 kg / cm 2 .
• the granulation yield ranges from 50% to 60%.
• the pH of the granules ranges from 2.2 to 4.5 and is preferably around 2.8.
• the temperature of the granules at the outlet of the granulator ranges from 55 ° C to 80 ° C, and is preferably around 75 ° C.
• the granules have a moisture content ranging from 4 to 6%, and preferably 5%, by weight, relative to the weight of the granules.
• the granules are then dried in a dryer.
• the inlet temperature of the dryer ranges from 250 ° C to 400 ° C, and is preferably 350 ° C.
• the outlet temperature of the dryer ranges from 75 ° C to 110 ° C and is preferably 95 ° C.
• the granules have a moisture content ranging from 0.5 to 4%, and preferably 2%, by weight, relative to the weight of the granules.
• organo-mineral fertilizer NK organo-mineral fertilizer based on nitrogen and potassium is obtained, known as organo-mineral fertilizer NK, in the form of granules.
• organo-mineral fertilizer NK organo-mineral fertilizer based on nitrogen and potassium
• the granules obtained are particularly resistant to storage and subsequent handling.
• the particle size distribution of the granules ranges from 2.6 to 4.5 mm.
• the hardness, measured using the Versatest® test bench compression method, is at least 6 kg / cm 2 .
• the granulation yield ranges from 50% to 60%.
• 300 kg / t of lignite, 323 kg / t of ammonium sulphate, 315 kg / t of potassium chloride or sulphate, 31 kg / t of magnesia oxide are available, These materials are weighed on a weighing belt, mixed in a hopper and introduced into a Heirich® granulator. Granulation is carried out in an acid medium. For this, 100 kg / t of sulfuric acid at 70% by weight are added. Water vapor is introduced at about 140 ° C in an amount of about 500 kg / hour. Water is also introduced in an amount of about 100 liters. At the outlet of the granulator, the pH of the granules ranges from 2.2 to 4.5 and is preferably around 4.
• the temperature of the granules, at the outlet of the granulator ranges from 55 ° C to 80 ° C, and is preferably about 75 ° C.
• the granules At the outlet of the granulator, the granules have a moisture content ranging from 4 to 6%, and preferably 5%, by weight, relative to the weight of the granules.
• the granules are then dried in a dryer.
• the inlet temperature of the dryer ranges from 250 ° C to 400 ° C, and is preferably 350 ° C.
• the outlet temperature of the dryer ranges from 75 ° C to 110 ° C and is preferably 95 ° C.
• the granules have a moisture content ranging from 0.5 to 4%, and preferably 2%, by weight, relative to the weight of the granules.
• a mineral fertilizer based on nitrogen and potassium known as NK mineral fertilizer, is obtained in the form of granules.
• the granules obtained are particularly resistant to storage and subsequent handling.
• the particle size distribution of the granules ranges from 2.6 to 4.5 mm.
• the hardness, measured using the Versatest® test bench compression method, is at least: 6 kg / cm 2 .
• the granulation yield ranges from 30% to 50%.
• Water is also introduced in an amount of about 100 liters.
• the pH of the granules ranges from 2.2 to 4.5 and is preferably around 2.8.
• the temperature of the granules at the outlet of the granulator ranges from 55 ° C to 80 ° C, and is preferably around 75 ° C.
• the granules have a moisture content ranging from 4 to 6%, and preferably 5%, by weight, relative to the weight of the granules.
• the granules are then dried in a dryer.
• the inlet temperature of the dryer ranges from 250 ° C to 400 ° C, and is preferably 350 ° C.
• the outlet temperature of the dryer ranges from 75 ° C to 110 ° C and is preferably 95 ° C.
• the granules have a moisture content ranging from 0.5 to 4%, and preferably 2%, by weight, relative to the weight of the granules.
• An organo-mineral fertilizer based on nitrogen, phosphorus and potassium is obtained, known as NPK organo-mineral fertilizer, in the form of granules.
• the granules obtained are particularly resistant to storage and subsequent handling.
• the particle size distribution of the granules ranges from 2.6 to 4.5 mm.
• the hardness, measured using the Versatest® test bench compression method, is at least: 6 kg / cm 2 .
• the granulation yield ranges from 50 to 60%.
• the temperature of the granules, at the outlet of the granulator, ranges from 40 ° C to 80 ° C, and is preferably around 75 ° C.
• the granules At the outlet of the granulator, the granules have a moisture content of approximately 19%, by weight, relative to the weight of the granules.
• the granules are then dried in a dryer.
• the temperature of the gases entering the dryer ranges from 250 ° C to 350 ° C, and is preferably 350 ° C.
• the temperature of the gases leaving the dryer ranges from 40 ° C to 95 ° C and is preferably 75 ° C.
• the granules have a moisture content ranging from 10% to 19%, and preferably 15%, by weight, relative to the weight of the granules.
• the pH of the granules preferably ranges from 6.5 to 7.5 and is preferably around 6.8.
• an organic amendment is obtained in the form of granules.
• the amount of organic matter in the organic amendment in the form of granules is 60% by weight, relative to the weight of the organic amendment.
• microorganisms can quickly continue the humification of the organic matter contained in the finished product and thus contribute quickly and effectively to the improvement of the clay-humic complex of the soil. .
• the granules obtained are particularly resistant to storage and subsequent handling.
• the particle size distribution of the granules ranges from 2.6 to 4.5 mm.
• the hardness, measured using the Versatest® test bench compression method, is at least: 6 kg / cm 2 .
• the granulation yield is about 40%.
• the temperature of the granules, at the outlet of the granulator, ranges from 40 ° C to 80 ° C, and is preferably around 75 ° C.
• the granules At the outlet of the granulator, the granules have a moisture content of approximately 19%, by weight, relative to the weight of the granules.
• the granules are then dried in a dryer.
• the temperature of the gases entering the dryer ranges from 250 ° C to 350 ° C, and is preferably 350 ° C.
• the temperature of the gases leaving the dryer ranges from 40 ° C to 95 ° C and is preferably 75 ° C.
• the granules At the outlet of the dryer, the granules have a humidity level ranging from 10% to 19%, and preferably 15%, by weight, relative to the weight of the granules.
• the pH of the granules preferably ranges from 6.5 to 7.5 and is preferably around 6.8.
• an organic amendment with a high organic matter content is obtained in the form of granules.
• the amount of organic matter in the organic amendment in the form of granules is 60% by weight, relative to the weight of the organic amendment.
• microorganisms can quickly continue the humification of the organic matter contained in the finished product and thus contribute quickly and effectively to the improvement of the clay-humic complex of the soil. .
• the granules obtained are particularly resistant to storage and subsequent handling.
• the particle size distribution of the granules ranges from 2.6 to 4.5 mm.
• the hardness, measured using the Versatest® test bench compression method, is at least: 6 kg / cm 2 .
• the granulation yield is about 40%.

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• Chemical & Material Sciences (AREA)
• Organic Chemistry (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Inorganic Chemistry (AREA)
• Engineering & Computer Science (AREA)
• Environmental & Geological Engineering (AREA)
• Fertilizers (AREA)

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• 2004
  • 2004-05-05 FR FR0404827A patent/FR2869900B1/fr not_active Expired - Fee Related
• 2005
  • 2005-04-29 EP EP05763733A patent/EP1742896A2/de not_active Withdrawn
  • 2005-04-29 WO PCT/FR2005/001084 patent/WO2005121049A2/fr not_active Ceased
• 2006
  • 2006-10-26 IL IL178880A patent/IL178880A0/en unknown
  • 2006-10-26 TN TNP2006000344A patent/TNSN06344A1/fr unknown
  • 2006-11-17 MA MA29460A patent/MA28586B1/fr unknown

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