CA2033326C - Process for binding dust in fertilizer granules - Google Patents
Process for binding dust in fertilizer granulesInfo
- Publication number
- CA2033326C CA2033326C CA002033326A CA2033326A CA2033326C CA 2033326 C CA2033326 C CA 2033326C CA 002033326 A CA002033326 A CA 002033326A CA 2033326 A CA2033326 A CA 2033326A CA 2033326 C CA2033326 C CA 2033326C
- Authority
- CA
- Canada
- Prior art keywords
- dust
- granules
- molasses
- process according
- mixture
- 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.)
- Expired - Fee Related
Links
Classifications
-
- 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
- C05D1/005—Fertilisers containing potassium post-treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2/00—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic
- B01J2/30—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic using agents to prevent the granules sticking together; Rendering particulate materials free flowing in general, e.g. making them hydrophobic
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D5/00—Sulfates or sulfites of sodium, potassium or alkali metals in general
- C01D5/004—Preparation in the form of granules, pieces or other shaped products
-
- 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
- C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
- C05G3/20—Mixtures of one or more fertilisers with additives not having a specially fertilising activity for preventing the fertilisers being reduced to powder; Anti-dusting additives
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Pest Control & Pesticides (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Fertilizers (AREA)
Abstract
Dust is bound in fertilizer granules by spraying the granules with a solution of molasses and another oxygen-containing hydrocarbon from the group glycerine, polyethylene glycol and triethanolamine.
Description
~s332 A process for bindincL dust in fertilizer granules The invention relates to a process for preventing the formation of dust when loading or transporting granulated materials or pellets, in particular fertilizer granules.
To an increasing extent, fertiiizers.are being produced in granulated farm and transported in bulk. The granules are produced mainly by the granulation method which forms the fine-grained salt into flakes fxom which, subsequently, granules having preferentially a grain size range of 1.0 to 4.0 mm, are formed by crushing and screening.
It is a known fact that when fine-grained materials are granulated, adjuvants are added to the starting mixture in order to facilitate the granulation process.
For example, German Patent Application (Auslegeschrift) DE-AS
21 01 585 describes the addition of 2 to 3% organic or inorganic binding agents such as molasses, starch, calcium chloride and alkali and alkaline-earth sulfates arid nitrates when compacting Thomas meal (phosphate fertilizer). With this method it is essential to stay within certain temperature ranges and to follow certain time sequences during the actual compacting and secondary treatment stages.
German Patent DE-PS 36 18 058 describes a process for granulating water-soluble fertilizers containing a high proportion of kieserite, characterized by the fact that soluble and/or slightly colloidal soluble substances of the mono-, di-and polysaccharide class and/or simple hydrophilic derivatives thereof are added in solid form or as a solution in amounts between 0.1 and 5%; in addition, saccharose in solid form or as sugar-rich molasses is added.
The granules formed in this way are characterized above a11 by sharp edges and corners, which are formed during the subsequent crushing stage and which are then abraded during transportation or handling of the material, thereby giving rise to the ~3326 undesired generation of dust during transportati4n and further use. This dust causes unacceptable environmental pollution. It is a known fact that attempts are made to counter this phenomenon by screening out the extremely fine grain sizes prior to loading at the manufacturer's plant. However, it has been discovered in practice that this secondary treatment is not enough by itself to remove the adhering residue of fine dust or to improve the abrasion resistance of the edges, corners and also the sides of each and every granule.
German Patent DD-PS 136 956 describes a procedure for improving the abrasion resistance of potash fertilizer granules wherein, following the granulation process, the potash fertilizer undergoes secondary treatment consisting of the following steps: dedusting in a fluidized bed, followed by surface treatment of the granules with water or aqueous additives, then drying and cooling of.the granules treated in this manner.
The intention of this process is to remove any existing unstable tips or edges by dissolving and recrystallizing the material, thereby strengthening the surface of the granules.
German Patent Application (Offenlegungsschrift) DE-OS 30 03 883 supplements the information provided in the aforementioned patent application by prescribing a temperature range of 80 -100° at which an optimum strength gain is achieved, if at the same time a minimum dwell time of 10 seconds in a high-humidity atmosphere is guaranteed.
The treatment method described requires a great deal of investment for the equipment installed downstream of the actual granulating and screening stages, and it can only be used at the manufacturer's premises because the heat required for the process comes from the production of the granules. Thus, quite apart from the investment costs and the resulting equipment maintenance costs, this method cannot be used, for example, for granulated potash products which are stored for long periods of time in intermediate storage piles from where they must again be loaded onto means of transport. It is a known fact that long storage times and the associated physical ~3326 effects, such as compression and alternating atmospheric humidity levels, can have negative effects on granules treated in this manner (caking tendency).
It is therefore the purpose of the invention to create a process which prevents the formation of dust during the loading and transporting of granules or pellets, in particular fertilizer granules, and which at the same time optimally satisfies a11 the requirements which might be made as regards environmental compatibility, long storage life of the treated granules and simplicity of application.
These goals are achieved by the process according to the invention wherein a mixture of at least two organic substances, which are completely soluble one with the other, are added to the granules; the second organic substance is a water-soluble, oxygen-containing hydrocarbon and the first organic substance possesses an adhesive effect, and the second oxygen-containing organic substance controls the moisture content of the mixture.
The dust-binding mixture used must therefore possess an adhesive effect on the surface of the granules. It may not be diluted by absorbing an excessive amount of moisture nor may so much moisture be driven off by drying processes that it loses its adhesive and bonding effect.
Generally speaking, the substances used for this purpose possess relatively high viscosity at room temperature as well as water-repellent properties. Such viscous substances should possess the highest possible flash point because as a rule they have to be spray-applied at approx. 80° C in order to achieve good distribution.
The long storage life of the material treated in this manner is due to the long-lasting dust-binding effect of the dust-binding mixture according to the invention.
A preferred mixture (dust-binding mixture) consists of molasses and at least one further water-soluble, oxygen-containing hydrocarbon) The mixture is added in an extremely finely distributed form to the granules.
In the process, the molasses provides the adhesive effect, thus binding the dust, while by controlling the water vapour pressure of the solution, the second organic substance ensures that the film of dust-binding mixture adhering to the granules remains moist and thus active.
The molasses, which is a particularly suitable substance for the purpose, accumulates as the second raw sugar stage in the process of beet sugar refining. The second organic substance consists of water-soluble, oxygen-containing hydrocarbons from the group comprising glycerine, polyethylene glycol and triethanolamine, used either singly or in a mixture containing two of these compounds. These substances satisfy particularly well the requirements which a dust-binding agent must meet.
Even just one of these substances is effective together with molasses, but it is particularly advantageous to use a mixture of two or three substances in a ratio of 1 : 1. In each case, the substances glycerine, polyethylene glycol and triethanolamine should be used alone or mixed together in a proportion equal to at least 10% of the total amount of dust-binding mixture (including molasses) used.
The subject of the invention is in particular a homogeneous mixture of molasses and of the second organic substance in the mixture ratio 1 : 0.3 to 1 : 2.
It was found, for example, that in the case of potash fertilizer granules even a small addition, namely 0.6 to 1.2 wt.%, and preferentially 0.7 to 0.9 wt.% of the dust-binding mixture relative to the weight of the bulk product, gives the desired optimal effect. When the mixture is applied in this way to potash fertilizer granules, the useful substance content (Kz0) does not drop below the prescribed tolerance range.
'ii~~:S ia~i~~i The homogeneous mixture can be prepared without any difficulty at room temperature in a container fitted with an agitator device.
The granules which are to be loaded and from which the very fine dust has already been removed by screening, can be coated with the mixture by applying it at an appropriate pressure and at room temperature up to a maximum temperature of 50° C, using an appropriately selected nozzle. In contrast to other, purely organic, non-aqueous dust-binding agents, it is not absolutely necessary to heat the mixture.
The desired dust-binding effect is determined according to the method described below:
Samples of the granules to be conditioned are screened to remove any particles that may be adhering to them. Then, the binding agent to be tested is uniformly distributed and spray-applied to the samples, each of which weighs 200 g. After the mixture has been applied, dust (<0.2 mm) from the bulk product is added in the amount of~exactly 1% relative to the weight of the granules and a11 the samples are then mixed by rotating them for 5 minutes in sample bottles.
The samples obtained in this way are then examined, for example after they have been stored for a certain amount of time. The examination is carried out by screening the entire contents of the sample bottle on an Alpine air-jet machine fitted with a 0.063 mm screen.
The screening must last exactly three minutes. Then the filter paper loaded with dust must be removed from the machine and it is either weighed or, in the case of soluble dusts, e.g. potash salts, the dust is washed off the filter and the amount is determined by titration. The dust-binding effect in per cent is calculated from this value.
~3326 In the comparative tests listed in the following Table, in each case 9 kg of binding agent were spray-applied to one tonne of potassium sulfate pressed granules at a temperature of 45° C.
The individual chemicals were used in the following form:
- Molasses with a solids content of 47%
- Glycerine (trihydroxypropane), single distilled 86-88%
Density at 20° C = 1.23 g/cm3; flash point 180° C
- Polyethylene glycol Density at 20° C = 1.13 g/cm3; with a mean molecular weight of 400 g/mole; flash point: > 100° C
- Triethanolamine N(CHZCHZOH)3;
Density at 25° C = 1.11 g/cm3; content 85%; max. 0.5% HZO;
i5 approx. 15% iminobisethanol.
~~a~a~. ~6 TABLE
Dust-binding in relation to the null sample in %
after 1 after 6 week weeks 1. Null sample 0 0 2. Molasses (100%) 62 66 3. Glycerine (100%) 61 40 4. Polyethylene glycol (100%) 56 49 5. Molasses/glycerine (1:1) 87 86 6. Molasses/polyethylene glycol 87 82 (1:1) 7. Molasses/polyethylene glycol 89 87 (2:1) 8, Molasses/triethanolamine (1:1).96 86 9. Molasses/glycerine/polyethylene86 80 glycol (1:0.5:0.5) 10. Molasses/glycerine/ 99 90 triethanolamine (1:0.5:0.5) 11. Molasses/polyethylene/glycol/ 96 87 triethanolamine (1:0.5:0.5) _8_ It can be seen that compared with an untreated sample, very good dust binding can be achieved.
When used by themselves, the individual substances are nowhere nearly as effective as the mixtures.
On the one hand, the mixtures have a much more intensive and complete effect, and on the other the effect lasts longer. High dust-binding capability is still retained after 6 weeks.
The examples of use listed below describe the invention without in any way limiting it.
Example 1 Potassium sulfate granules from the press granulation process are screened and then stored in a storage shed without being conditioned. At a product temperature of 40° G the granules are screened to remove the extremely fine dust fraction prior to being bulk loaded, and then they are treated with the dust-binding agent before reaching the discharge point of the conveyor belt and before entering the transportation container;
at the treatment point, fan jet atomizing nozzles are arranged in such a way that the falling mass of material is covered on a11 sides by the spray cone. Downstream of this point are arranged deflection devices to ensure that the wetted product is thoroughly mixed prior to loading. The atomizing pressure is approx. 3 to 5 bar) ~C~~3326 _g_ The media are on average at room temperature. The mixture used consists of 50% molasses (content 47%) and 50% glycerine (content 86% and density 1.23 g/cm3) and it is applied in an amount of 0.8%, relative to the KZS04 granules which are to be conditioned.
Example 2 The granules coming from the press granulation stage are screened and then fed directly to the loading process. After the very fine dust has also been screened out, the conditioning agent is applied - in the manner described under Example 1 - in an amount of 4 kg molasses and 4 kg polyethylene glycol (density = 1.13, and mean molecular weight = 400 g/mol) per tonne of granules, but because of the temperature of the freshly produced granules, it is not necessary to heat up the applied conditioning agent if an atomizing pressure of at least 3 to 5 bar is available.
To an increasing extent, fertiiizers.are being produced in granulated farm and transported in bulk. The granules are produced mainly by the granulation method which forms the fine-grained salt into flakes fxom which, subsequently, granules having preferentially a grain size range of 1.0 to 4.0 mm, are formed by crushing and screening.
It is a known fact that when fine-grained materials are granulated, adjuvants are added to the starting mixture in order to facilitate the granulation process.
For example, German Patent Application (Auslegeschrift) DE-AS
21 01 585 describes the addition of 2 to 3% organic or inorganic binding agents such as molasses, starch, calcium chloride and alkali and alkaline-earth sulfates arid nitrates when compacting Thomas meal (phosphate fertilizer). With this method it is essential to stay within certain temperature ranges and to follow certain time sequences during the actual compacting and secondary treatment stages.
German Patent DE-PS 36 18 058 describes a process for granulating water-soluble fertilizers containing a high proportion of kieserite, characterized by the fact that soluble and/or slightly colloidal soluble substances of the mono-, di-and polysaccharide class and/or simple hydrophilic derivatives thereof are added in solid form or as a solution in amounts between 0.1 and 5%; in addition, saccharose in solid form or as sugar-rich molasses is added.
The granules formed in this way are characterized above a11 by sharp edges and corners, which are formed during the subsequent crushing stage and which are then abraded during transportation or handling of the material, thereby giving rise to the ~3326 undesired generation of dust during transportati4n and further use. This dust causes unacceptable environmental pollution. It is a known fact that attempts are made to counter this phenomenon by screening out the extremely fine grain sizes prior to loading at the manufacturer's plant. However, it has been discovered in practice that this secondary treatment is not enough by itself to remove the adhering residue of fine dust or to improve the abrasion resistance of the edges, corners and also the sides of each and every granule.
German Patent DD-PS 136 956 describes a procedure for improving the abrasion resistance of potash fertilizer granules wherein, following the granulation process, the potash fertilizer undergoes secondary treatment consisting of the following steps: dedusting in a fluidized bed, followed by surface treatment of the granules with water or aqueous additives, then drying and cooling of.the granules treated in this manner.
The intention of this process is to remove any existing unstable tips or edges by dissolving and recrystallizing the material, thereby strengthening the surface of the granules.
German Patent Application (Offenlegungsschrift) DE-OS 30 03 883 supplements the information provided in the aforementioned patent application by prescribing a temperature range of 80 -100° at which an optimum strength gain is achieved, if at the same time a minimum dwell time of 10 seconds in a high-humidity atmosphere is guaranteed.
The treatment method described requires a great deal of investment for the equipment installed downstream of the actual granulating and screening stages, and it can only be used at the manufacturer's premises because the heat required for the process comes from the production of the granules. Thus, quite apart from the investment costs and the resulting equipment maintenance costs, this method cannot be used, for example, for granulated potash products which are stored for long periods of time in intermediate storage piles from where they must again be loaded onto means of transport. It is a known fact that long storage times and the associated physical ~3326 effects, such as compression and alternating atmospheric humidity levels, can have negative effects on granules treated in this manner (caking tendency).
It is therefore the purpose of the invention to create a process which prevents the formation of dust during the loading and transporting of granules or pellets, in particular fertilizer granules, and which at the same time optimally satisfies a11 the requirements which might be made as regards environmental compatibility, long storage life of the treated granules and simplicity of application.
These goals are achieved by the process according to the invention wherein a mixture of at least two organic substances, which are completely soluble one with the other, are added to the granules; the second organic substance is a water-soluble, oxygen-containing hydrocarbon and the first organic substance possesses an adhesive effect, and the second oxygen-containing organic substance controls the moisture content of the mixture.
The dust-binding mixture used must therefore possess an adhesive effect on the surface of the granules. It may not be diluted by absorbing an excessive amount of moisture nor may so much moisture be driven off by drying processes that it loses its adhesive and bonding effect.
Generally speaking, the substances used for this purpose possess relatively high viscosity at room temperature as well as water-repellent properties. Such viscous substances should possess the highest possible flash point because as a rule they have to be spray-applied at approx. 80° C in order to achieve good distribution.
The long storage life of the material treated in this manner is due to the long-lasting dust-binding effect of the dust-binding mixture according to the invention.
A preferred mixture (dust-binding mixture) consists of molasses and at least one further water-soluble, oxygen-containing hydrocarbon) The mixture is added in an extremely finely distributed form to the granules.
In the process, the molasses provides the adhesive effect, thus binding the dust, while by controlling the water vapour pressure of the solution, the second organic substance ensures that the film of dust-binding mixture adhering to the granules remains moist and thus active.
The molasses, which is a particularly suitable substance for the purpose, accumulates as the second raw sugar stage in the process of beet sugar refining. The second organic substance consists of water-soluble, oxygen-containing hydrocarbons from the group comprising glycerine, polyethylene glycol and triethanolamine, used either singly or in a mixture containing two of these compounds. These substances satisfy particularly well the requirements which a dust-binding agent must meet.
Even just one of these substances is effective together with molasses, but it is particularly advantageous to use a mixture of two or three substances in a ratio of 1 : 1. In each case, the substances glycerine, polyethylene glycol and triethanolamine should be used alone or mixed together in a proportion equal to at least 10% of the total amount of dust-binding mixture (including molasses) used.
The subject of the invention is in particular a homogeneous mixture of molasses and of the second organic substance in the mixture ratio 1 : 0.3 to 1 : 2.
It was found, for example, that in the case of potash fertilizer granules even a small addition, namely 0.6 to 1.2 wt.%, and preferentially 0.7 to 0.9 wt.% of the dust-binding mixture relative to the weight of the bulk product, gives the desired optimal effect. When the mixture is applied in this way to potash fertilizer granules, the useful substance content (Kz0) does not drop below the prescribed tolerance range.
'ii~~:S ia~i~~i The homogeneous mixture can be prepared without any difficulty at room temperature in a container fitted with an agitator device.
The granules which are to be loaded and from which the very fine dust has already been removed by screening, can be coated with the mixture by applying it at an appropriate pressure and at room temperature up to a maximum temperature of 50° C, using an appropriately selected nozzle. In contrast to other, purely organic, non-aqueous dust-binding agents, it is not absolutely necessary to heat the mixture.
The desired dust-binding effect is determined according to the method described below:
Samples of the granules to be conditioned are screened to remove any particles that may be adhering to them. Then, the binding agent to be tested is uniformly distributed and spray-applied to the samples, each of which weighs 200 g. After the mixture has been applied, dust (<0.2 mm) from the bulk product is added in the amount of~exactly 1% relative to the weight of the granules and a11 the samples are then mixed by rotating them for 5 minutes in sample bottles.
The samples obtained in this way are then examined, for example after they have been stored for a certain amount of time. The examination is carried out by screening the entire contents of the sample bottle on an Alpine air-jet machine fitted with a 0.063 mm screen.
The screening must last exactly three minutes. Then the filter paper loaded with dust must be removed from the machine and it is either weighed or, in the case of soluble dusts, e.g. potash salts, the dust is washed off the filter and the amount is determined by titration. The dust-binding effect in per cent is calculated from this value.
~3326 In the comparative tests listed in the following Table, in each case 9 kg of binding agent were spray-applied to one tonne of potassium sulfate pressed granules at a temperature of 45° C.
The individual chemicals were used in the following form:
- Molasses with a solids content of 47%
- Glycerine (trihydroxypropane), single distilled 86-88%
Density at 20° C = 1.23 g/cm3; flash point 180° C
- Polyethylene glycol Density at 20° C = 1.13 g/cm3; with a mean molecular weight of 400 g/mole; flash point: > 100° C
- Triethanolamine N(CHZCHZOH)3;
Density at 25° C = 1.11 g/cm3; content 85%; max. 0.5% HZO;
i5 approx. 15% iminobisethanol.
~~a~a~. ~6 TABLE
Dust-binding in relation to the null sample in %
after 1 after 6 week weeks 1. Null sample 0 0 2. Molasses (100%) 62 66 3. Glycerine (100%) 61 40 4. Polyethylene glycol (100%) 56 49 5. Molasses/glycerine (1:1) 87 86 6. Molasses/polyethylene glycol 87 82 (1:1) 7. Molasses/polyethylene glycol 89 87 (2:1) 8, Molasses/triethanolamine (1:1).96 86 9. Molasses/glycerine/polyethylene86 80 glycol (1:0.5:0.5) 10. Molasses/glycerine/ 99 90 triethanolamine (1:0.5:0.5) 11. Molasses/polyethylene/glycol/ 96 87 triethanolamine (1:0.5:0.5) _8_ It can be seen that compared with an untreated sample, very good dust binding can be achieved.
When used by themselves, the individual substances are nowhere nearly as effective as the mixtures.
On the one hand, the mixtures have a much more intensive and complete effect, and on the other the effect lasts longer. High dust-binding capability is still retained after 6 weeks.
The examples of use listed below describe the invention without in any way limiting it.
Example 1 Potassium sulfate granules from the press granulation process are screened and then stored in a storage shed without being conditioned. At a product temperature of 40° G the granules are screened to remove the extremely fine dust fraction prior to being bulk loaded, and then they are treated with the dust-binding agent before reaching the discharge point of the conveyor belt and before entering the transportation container;
at the treatment point, fan jet atomizing nozzles are arranged in such a way that the falling mass of material is covered on a11 sides by the spray cone. Downstream of this point are arranged deflection devices to ensure that the wetted product is thoroughly mixed prior to loading. The atomizing pressure is approx. 3 to 5 bar) ~C~~3326 _g_ The media are on average at room temperature. The mixture used consists of 50% molasses (content 47%) and 50% glycerine (content 86% and density 1.23 g/cm3) and it is applied in an amount of 0.8%, relative to the KZS04 granules which are to be conditioned.
Example 2 The granules coming from the press granulation stage are screened and then fed directly to the loading process. After the very fine dust has also been screened out, the conditioning agent is applied - in the manner described under Example 1 - in an amount of 4 kg molasses and 4 kg polyethylene glycol (density = 1.13, and mean molecular weight = 400 g/mol) per tonne of granules, but because of the temperature of the freshly produced granules, it is not necessary to heat up the applied conditioning agent if an atomizing pressure of at least 3 to 5 bar is available.
Claims (7)
1. A process to prevent dust formation when handling or transporting granules or pellets, characterized in that a liquid mixture (dust-binding mixture) consisting of at least two organic substances, which are fully soluble one with the other, is added, wherein the second organic substance is a water-soluble oxygen-containing hydrocarbon namely glycerine, polyethylene glycol or triethanolamine and the first organic substance is molasses.
2. A process according to claim 1, characterized in that the dust-binding mixture is applied to the granules in extremely finely distributed form.
3. A process according to claim 1, characterized in that glycerine, polyethylene glycol or triethanolamine are used singly or mixed with each other, and these substances in each case make up at least 10% of the total amount of the dust-binding mixture including molasses.
4. A process according to claim 1 and 3, characterized in that in each case two of the substances glycerine, polyethylene glycol and triethanolamine are mixed in a ratio of approximately 1:1 and are added to the molasses.
5. A process according to claim 1, characterized in that the dust-binding mixture is applied in an amount of 0.6 to 1.2 wt. %, relative to the granules to be treated.
6. A process according to claim 1, characterized in that the dust-binding mixture is added in an amount of preferentially 0.7 to 0.9 wt. % relative to the granules to be treated.
7. A process according to claim 1, characterized in that the quantitative ratio between the molasses and the second organic substance is 1:0.3 to 1:2.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3918523A DE3918523A1 (en) | 1989-06-07 | 1989-06-07 | METHOD FOR BINDING DUST IN DUENGER GRANULES |
| DEP3918523.0 | 1989-06-07 | ||
| PCT/EP1990/000797 WO1990015038A2 (en) | 1989-06-07 | 1990-05-17 | Process for binding dust in fertilizer granules |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2033326A1 CA2033326A1 (en) | 1990-12-08 |
| CA2033326C true CA2033326C (en) | 1999-08-17 |
Family
ID=6382233
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002033326A Expired - Fee Related CA2033326C (en) | 1989-06-07 | 1990-05-17 | Process for binding dust in fertilizer granules |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP0431091B1 (en) |
| CA (1) | CA2033326C (en) |
| DD (1) | DD300100A5 (en) |
| DE (1) | DE3918523A1 (en) |
| IL (1) | IL94644A0 (en) |
| WO (1) | WO1990015038A2 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4232567C1 (en) * | 1992-09-29 | 1994-02-10 | Kali & Salz Ag | Granular sulphate fertiliser treatment to prevent dust formation during bulk transformation - comprises spraying with conc. urea soln. |
| DE102008045459A1 (en) | 2008-09-02 | 2010-03-04 | Chemson Polymer-Additive Ag | Method for preventing spread of particulate materials in air, comprises applying a mixture comprising glycerin and water on the particulate materials e.g. house dust, skin flakes, food scraps, debris, diesel emissions and pollen |
| EP2325289B1 (en) | 2009-11-10 | 2012-08-22 | FireStixx Holz-Energie GmbH | Method and device for processing a solid fuel |
| NZ596059A (en) * | 2011-10-28 | 2014-05-30 | Hamilton Hall Robert | Improvements in and relating to soil treatments |
| EP3250314A1 (en) | 2015-01-28 | 2017-12-06 | Maschinenfabrik Köppern GmbH & Co. KG | Method for conditioning granular fertilizer material |
| DE102015115468A1 (en) | 2015-09-14 | 2017-03-16 | Maschinenfabrik Köppern GmbH & Co KG | Process for conditioning fertilizer granules |
| GR1008958B (en) * | 2015-11-04 | 2017-02-22 | Quevenendol Limited | Method for covering granular fertilizers with elemental sulphur |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE291265C (en) * | ||||
| DE621739C (en) * | 1931-01-11 | 1935-11-13 | I G Farbenindustrie Akt Ges | Process for improving the storability and spreadability of mixed fertilizers obtained by reacting the components |
| US3195999A (en) * | 1963-07-24 | 1965-07-20 | Grace W R & Co | Composition consisting essentially of crystalline urea coated with sugar |
| CH481676A (en) * | 1965-09-10 | 1969-11-30 | Agripat Sa | Process for the production of non-dusting powdery agents which contain solid organic substances from the group of agricultural chemicals, and non-dusting agents obtained according to this process |
| FR2061865A5 (en) * | 1969-07-31 | 1971-06-25 | Paris Blancs Mineraux | |
| LU60193A1 (en) * | 1970-01-16 | 1971-09-22 | ||
| SU912644A1 (en) * | 1980-04-21 | 1982-03-15 | Белорусский филиал Всесоюзного научно-исследовательского и проектного института галургии | Method for reducing caking of potassium chloride |
| JPS605558B2 (en) * | 1981-03-27 | 1985-02-12 | 花王株式会社 | Potash salt anti-caking agent |
| US4689251A (en) * | 1986-01-29 | 1987-08-25 | Desoto, Inc. | Anticaking and antidusting composition |
| DE3618058C1 (en) * | 1986-05-28 | 1987-02-19 | Kali & Salz Ag | Process for granulating water-soluble fertilizers with a high proportion of kieserite |
-
1989
- 1989-06-07 DE DE3918523A patent/DE3918523A1/en active Granted
-
1990
- 1990-05-17 EP EP90907031A patent/EP0431091B1/en not_active Expired - Lifetime
- 1990-05-17 CA CA002033326A patent/CA2033326C/en not_active Expired - Fee Related
- 1990-05-17 WO PCT/EP1990/000797 patent/WO1990015038A2/en active IP Right Grant
- 1990-06-05 DD DD341336A patent/DD300100A5/en unknown
- 1990-06-06 IL IL94644A patent/IL94644A0/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| WO1990015038A3 (en) | 1991-02-07 |
| WO1990015038A2 (en) | 1990-12-13 |
| CA2033326A1 (en) | 1990-12-08 |
| DE3918523A1 (en) | 1990-12-13 |
| EP0431091B1 (en) | 1997-04-02 |
| EP0431091A1 (en) | 1991-06-12 |
| DE3918523C2 (en) | 1993-09-23 |
| IL94644A0 (en) | 1991-04-15 |
| DD300100A5 (en) | 1992-05-21 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |