CN104973907A - Composite nitrogen fertilizer and preparation method thereof - Google Patents
Composite nitrogen fertilizer and preparation method thereof Download PDFInfo
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- CN104973907A CN104973907A CN201410145278.8A CN201410145278A CN104973907A CN 104973907 A CN104973907 A CN 104973907A CN 201410145278 A CN201410145278 A CN 201410145278A CN 104973907 A CN104973907 A CN 104973907A
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Abstract
The invention discloses a composite nitrogen fertilizer and a preparation method thereof, wherein the composite nitrogen fertilizer is composed of 30-70% by mass of ammonium nitrate phosphorus and 30-70% by mass of ammonium sulfate. The composite nitrogen fertilizer contains the two forms of nitrogen: nitrate nitrogen and ammonium nitrogen, so that the fertilizer is suitable for topdressing and is quick in fertilizer efficiency due to quick-acting and long-acting combination, The fertilizer is quick to dissolve, is good in water solubility, can satisfy the requirements of modern agricultural devices such as drip irrigation, sprinkling irrigation and the like due to full water solubility and is suitable for a development demand of integration of water charge of economical crops, and meanwhile, the fertilizer is rich in a secondary element, sulfur, which is required in growth of the crops, is comprehensive in nutrition and can effectively promote growth of the crops and improvement of quality.
Description
Technical field
The present invention relates to crop fertilizer field, more particularly, relate to a kind of composite nitrogen fertilizer and preparation method thereof.
Background technology
People, when long-term cropping, in order to keep fertile soil, generally needing to use chemical fertilizer and supplementing nutrient to soil, but a large amount of chemical fertilizer that uses can damage the structure of soil, the plant of simultaneously cultivating also can be polluted, and most chemical fertilizer utilization ratio is all lower, is generally about 35%.
Elemental nitrogen is one of macroelement required in crop growth process, is amino acid whose integral part in plant materials, is the important component forming protein, nucleic acid, phosphatide and some tethelin.The main nitrogen fertilizers of current China has urea, bicarbonate of ammonia, ammonium chloride, ammonium nitrate etc., these nitrogenous fertilizer only dissociation or be separated generate ammonium nitrogen and nitric nitrogen could absorb by plant, and the demand of Different Crop to nitric nitrogen and ammonium nitrogen there are differences, usually two kinds of form nitrogens with the use of time it is the most obvious to the promoter action of plant growth.In existing fertilizer, urea is the main source of nitrogenous fertilizer, but amount of urea is too much, can cause crop excessive growth, and life-time service can cause crop alimentary imbalance, environmental pollution; Because the water absorbability of urea is stronger, be easy to deliquescence and lost efficacy, be unsuitable for irrigating; On the other hand, urea itself is containing a kind of toxic substance being called biuret, and its concentration, when 500ppm, just can play restraining effect to crop young root and young shoot.
Summary of the invention
The technical problem to be solved in the present invention is, has a defect of certain toxicity for the easy deliquescence of fertilizer containing urea of prior art above-mentioned, provides a kind of and can be used for dripping tank and good composite nitrogen fertilizer of fertilizer efficiency and preparation method thereof.
The technical solution adopted for the present invention to solve the technical problems is: construct a kind of composite nitrogen fertilizer, is that the ammonium nitrate phosphorus of 30% ~ 70% and the ammonium sulfate of 30% ~ 70% form by mass percentage.
In composite nitrogen fertilizer of the present invention, described composite nitrogen fertilizer is that the ammonium nitrate phosphorus of 50% and the ammonium sulfate of 50% form by mass percentage.
In composite nitrogen fertilizer of the present invention, described ammonium nitrate phosphorus is that the ammonium nitrate of 92% and the ammonium phosphate of 8% form by mass percentage.
In composite nitrogen fertilizer of the present invention, described composite nitrogen fertilizer comprises the available nutrient of following massfraction: nitrogen 22% ~ 28%, sulphur 10% ~ 15% and phosphorus 0.5% ~ 5%.
In composite nitrogen fertilizer of the present invention, the particle diameter of described composite nitrogen fertilizer is 2mm-4.75mm.
Present invention also offers a kind of preparation method of composite nitrogen fertilizer, said method comprising the steps of:
A mass percentage is after the ammonium nitrate phosphorus heating and melting of 30% ~ 70% by (), deliver in the tower top tempering tank of prilling tower;
(b) mass percentage be 30% ~ 70% ammonium sulfate weigh after add in described tempering tank, fully make mixed slurry after mixing;
C () mixed slurry is sent into tablets press and is carried out sprinkling granulation, by the centrifugal force of tablets press shower nozzle high speed rotating, mixed slurry is thrown away small droplets, small droplets in prilling tower in dropping process with the air inversion contact heat-exchanging that rises in tower, small droplets is progressively frozen into solid particulate by liquid with the decline of temperature, and when dropping down onto at the bottom of tower, temperature is down to 45-65 DEG C;
D () solid particulate is through cooling, screening, anti-caking process, obtained particle diameter is the composite nitrogen fertilizer of 2mm-4.75mm.
In the preparation method of composite nitrogen fertilizer of the present invention, the rotating speed of described shower nozzle is 35r/min-40r/min.
In the preparation method of composite nitrogen fertilizer of the present invention, the temperature of described ammonium nitrate phosphorus phosphorus heating and melting is 145 DEG C ~ 165 DEG C.
In the preparation method of composite nitrogen fertilizer of the present invention, described ammonium nitrate phosphorus is that the ammonium nitrate of 92% and the ammonium phosphate of 8% form by mass percentage.
In the preparation method of composite nitrogen fertilizer of the present invention, described composite nitrogen fertilizer is that the ammonium nitrate phosphorus of 50% and the ammonium sulfate of 50% form by mass percentage.
Implement composite nitrogen fertilizer of the present invention and preparation method thereof, there is following beneficial effect: only comprise ammonium nitrate p and s acid ammonium two kinds of components, with low cost and avoid the side effect using urea to make nitrogenous fertilizer to bring; And simultaneously containing nitric nitrogen and ammonium nitrogen two kinds of form nitrogens, rapid long-acting combines, and be applicable to topdressing, fertilizer efficiency is fast; And its dissolve fast, water soluble characteristic is good, water-soluble needs that can meet the modern installations such as dropper, sprinkling irrigation agricultural entirely, is applicable to the growth requirement of cash crop water rate integration; Be rich in the secondary-element sulfur needed for plant growth in this composite nitrogen fertilizer, comprehensive nutrition simultaneously, effectively promote the growth of crop and the improvement of quality; And preparation method is simple, conforming product rate is high.
Embodiment
According to the growth needs of crop, nitric nitrogen and ammonium nitrogen are the major nitrogen source in crop growth process, nitric nitrogen and ammonium nitrogen are in the conversion, metabolism etc. promoting crop nitrogen nutrition and nitrogenous substances, there are necessity and complementarity between the two, and the demand of Different Crop to nitric nitrogen and ammonium nitrogen there are differences, usually two kinds of forms nitrogen with the use of time it is the most obvious to the promoter action of acting growth.Particularly, the features such as nitric nitrogen has solvability, unfixing in soil, crop easily absorbs, fertilizer efficiency is rapid; Ammonium nitrogen is because its ion itself is with positive charge, and the advantage such as soil colloid particle is electronegative, Gu ammonium nitrogen can by soil absorption, having nutrient not easily runs off, and fertilizer efficiency persistence is good.The present invention, according to the characteristic of ammonium nitrogen and nitric nitrogen, has invented a kind of composite nitrogen fertilizer pointedly.
Composite nitrogen fertilizer is that the ammonium nitrate phosphorus of 30% ~ 70% and the ammonium sulfate of 30% ~ 70% form by mass percentage, and the particle diameter of this composite nitrogen fertilizer is between 2mm-4.75mm, and uniform particle sizes, particle is less.Be rich in nitric nitrogen and ammonium nitrogen two kinds of form nitrogens in composite nitrogen fertilizer simultaneously, there is the advantages such as fertilizer efficiency is fast, fertilizer efficiency persistence is good, and its dissolve soon, water soluble characteristic is good, water-soluble needs that can meet the modern installations such as dropper, sprinkling irrigation agricultural entirely; Be rich in the secondary-element sulfur needed for plant growth in this composite nitrogen fertilizer, comprehensive nutrition simultaneously, effectively promote the growth of crop and the improvement of quality.
Wherein ammonium nitrate phosphorus is the mixture of ammonium nitrate and ammonium phosphate, and preferably ammonium nitrate phosphorus is that the ammonium nitrate of 92% and the ammonium phosphate of 8% form by mass percentage, and namely the mass ratio of ammonium nitrate and ammonium phosphate is 92:8.Because ammonium nitrate belongs to explosives, transport and save and there is inconvenience, therefore in ammonium nitrate, a small amount of ammonium phosphate is added, bring conveniently to storage and transport on the one hand, make it have nitric nitrogen and ammonium nitrogen owing to adding ammonium phosphate on the other hand simultaneously, can be absorbed by crops better.
Preferably, when in composite nitrogen fertilizer, the mass percentage of ammonium nitrate p and s acid ammonium respectively accounts for 50%, its fertilizer efficiency is better, is more conducive to absorption and the growth of crop.
The available nutrient of following massfraction is comprised: nitrogen 22% ~ 28% in composite nitrogen fertilizer, sulphur 10% ~ 15% and phosphorus 0.5% ~ 5%, make the macroelement nitrogen in fertilizer needed for existing plant growth and phosphorus, also have the secondary-element sulfur played to pass effect of growing to crop, the growth for crop provides balanced nutrient simultaneously.
Composite nitrogen fertilizer of the present invention, only comprises ammonium nitrate p and s acid ammonium two kinds of components, with low cost and avoid the side effect using urea to make nitrogenous fertilizer to bring; And simultaneously containing nitric nitrogen and ammonium nitrogen two kinds of form nitrogens, rapid long-acting combines, and be applicable to topdressing, fertilizer efficiency is fast; And its dissolve fast, water soluble characteristic is good, water-soluble needs that can meet the modern installations such as dropper, sprinkling irrigation agricultural entirely, is applicable to the growth requirement of cash crop water rate integration; Be rich in the secondary-element sulfur needed for plant growth in this composite nitrogen fertilizer, comprehensive nutrition simultaneously, effectively promote the growth of crop and the improvement of quality.
Present invention also offers a kind of preparation method of composite nitrogen fertilizer, comprise the following steps:
Step (a): be after the ammonium nitrate phosphorus heating and melting of 30% ~ 70% by mass percentage, deliver in the tower top tempering tank of prilling tower.
The ammonium nitrate phosphorus accounting for composite nitrogen fertilizer total mass 30% ~ 70% of precise is delivered to melting device heating and melting through bucket elevator, and Heating temperature is 145 DEG C ~ 165 DEG C, delivers in the tower top tempering tank of prilling tower after the complete melting of ammonium nitrate phosphorus.Ammonium nitrate phosphorus is that the ammonium nitrate of 92% and the ammonium phosphate of 8% form by mass percentage, and preferably, the mass percentage that ammonium nitrate phosphorus accounts for composite nitrogen fertilizer is 50%.
Step (b): mass percentage be 30% ~ 70% ammonium sulfate add in described tempering tank after computation weigh, fully make mixed slurry after mixing.
Risen on prilling tower by ammonium sulfate bucket elevator through screening, and deliver in the tempering tank of tower top, be fully mixed and made into mixed slurry with the ammonium nitrate phosphorus of above-mentioned melting, the percentage composition that ammonium sulfate accounts for composite nitrogen fertilizer gross weight is 30% ~ 70%, is preferably 50%.
Step (c): mixed slurry is sent into tablets press and carried out sprinkling granulation; by the centrifugal force of tablets press shower nozzle high speed rotating, mixed slurry is thrown away small droplets; small droplets in prilling tower in dropping process with the air inversion contact heat-exchanging that rises in tower, small droplets is progressively frozen into solid particulate by liquid with the decline of temperature.
Mixed slip is sent into tablets press and carries out sprinkling granulation, particularly tablets press is provided with prilling spry, mixed slip is by run by gravity to prilling spry place, and prilling spry relies on the centrifugal force of its high speed rotating that mixed slurry is thrown away countless small dropletss; Small droplets in prilling tower in dropping process with air (within temperature 35 DEG C) the counter current contact heat exchange of rising in tower, produce heat and mass effect each other, small droplets is made progressively to be frozen into solid particulate by liquid with the decline of temperature, and temperature is down to 45-65 DEG C when dropping down onto at the bottom of tower, after hopper is collected, sends into cooler cool further.The rotating speed of described shower nozzle is 35r/min-40r/min, is preferably 38r/min.
Step (d): solid particulate is through cooling, screening, anti-caking process, and obtained particle diameter is the composite nitrogen fertilizer of 2mm-4.75mm.
Solid particulate, after cooler fully cools, removes macrobead by vibratory screening apparatus, then carries out coating through coating machine and carry out anti-caking process, obtains the composite nitrogen fertilizer that particle diameter is 2mm-4.75mm, finally carries out being packaged to be finished product.
The preparation method of composite nitrogen fertilizer of the present invention, adopt melting slurry pelleting, can make full use of the heat energy of ammonium nitrate phosphorus liquid, moisture content of material is very low, without the need to drying process, saves energy consumption; Conforming product rate is high, and product particle surface is round and smooth, prevented from caking, good operational environment, three-waste free discharge; And adopt composite nitrogen fertilizer prepared by the method, simultaneously containing nitric nitrogen and ammonium nitrogen two kinds of form nitrogens, rapid long-acting combines, and be applicable to topdressing, fertilizer efficiency is fast; And its dissolve fast, water soluble characteristic is good, water-soluble needs that can meet the modern installations such as dropper, sprinkling irrigation agricultural entirely, is applicable to the growth requirement of cash crop water rate integration; Be rich in the secondary-element sulfur needed for plant growth in this composite nitrogen fertilizer, comprehensive nutrition simultaneously, effectively promote the growth of crop and the improvement of quality.
Embodiment 1
A kind of composite nitrogen fertilizer is that the ammonium nitrate phosphorus of 30% and the ammonium sulfate of 70% form by mass percentage.
The ammonium nitrate phosphorus being 30% by the mass percentage accounting for composite nitrogen fertilizer delivers to melting device through bucket elevator, and under 150 DEG C of conditions heating and melting, deliver to after the complete melting of ammonium nitrate phosphorus in the tower top tempering tank of prilling tower; The ammonium sulfate bucket elevator being 70% by the mass percentage through screening rises on prilling tower, and delivers in the tempering tank of tower top, is fully mixed and made into mixed slurry with the ammonium nitrate phosphorus of above-mentioned melting; Mixed slip is by run by gravity to prilling spry place, and prilling spry relies on the centrifugal force of its high speed rotating that mixed slurry is thrown away countless small dropletss; Small droplets in prilling tower in dropping process with the air inversion contact heat-exchanging that rises in tower, produce heat and mass effect each other, make small droplets progressively be frozen into solid particulate by liquid with the decline of temperature, the rotating speed of described shower nozzle is 35r/min; The solid particulate of last gained, after cooler fully cools, removes macrobead by vibratory screening apparatus, then carries out coating through coating machine and carry out anti-caking process, obtains the composite nitrogen fertilizer that particle diameter is 4mm, finally carries out being packaged to be finished product.
Embodiment 2
A kind of composite nitrogen fertilizer is that the ammonium nitrate phosphorus of 50% and the ammonium sulfate of 50% form by mass percentage.
The ammonium nitrate phosphorus being 50% by the mass percentage accounting for composite nitrogen fertilizer delivers to melting device through bucket elevator, and under 145 DEG C of conditions heating and melting, deliver to after the complete melting of ammonium nitrate phosphorus in the tower top tempering tank of prilling tower; The ammonium sulfate bucket elevator being 50% by the mass percentage through screening rises on prilling tower, and delivers in the tempering tank of tower top, is fully mixed and made into mixed slurry with the ammonium nitrate phosphorus of above-mentioned melting; Mixed slip is by run by gravity to prilling spry place, and prilling spry relies on the centrifugal force of its high speed rotating that mixed slurry is thrown away countless small dropletss; Small droplets in prilling tower in dropping process with the air inversion contact heat-exchanging that rises in tower, produce heat and mass effect each other, make small droplets progressively be frozen into solid particulate by liquid with the decline of temperature, the rotating speed of described shower nozzle is 40r/min; The solid particulate of last gained, after cooler fully cools, removes macrobead by vibratory screening apparatus, then carries out coating through coating machine and carry out anti-caking process, obtains the composite nitrogen fertilizer that particle diameter is 2mm, finally carries out being packaged to be finished product.
Embodiment 3
A kind of composite nitrogen fertilizer is that the ammonium nitrate phosphorus of 70% and the ammonium sulfate of 30% form by mass percentage.
The ammonium nitrate phosphorus being 70% by the mass percentage accounting for composite nitrogen fertilizer delivers to melting device through bucket elevator, and under 165 DEG C of conditions heating and melting, deliver to after the complete melting of ammonium nitrate phosphorus in the tower top tempering tank of prilling tower; The ammonium sulfate bucket elevator being 30% by the mass percentage through screening rises on prilling tower, and delivers in the tempering tank of tower top, is fully mixed and made into mixed slurry with the ammonium nitrate phosphorus of above-mentioned melting; Mixed slip is by run by gravity to prilling spry place, and prilling spry relies on the centrifugal force of its high speed rotating that mixed slurry is thrown away countless small dropletss; Small droplets in prilling tower in dropping process with the air inversion contact heat-exchanging that rises in tower, produce heat and mass effect each other, make small droplets progressively be frozen into solid particulate by liquid with the decline of temperature, the rotating speed of described shower nozzle is 38r/min; The solid particulate of last gained, after cooler fully cools, removes macrobead by vibratory screening apparatus, then carries out coating through coating machine and carry out anti-caking process, obtains the composite nitrogen fertilizer that particle diameter is 4.75mm, finally carries out being packaged to be finished product.
Embodiment 4
A kind of composite nitrogen fertilizer is that the ammonium nitrate phosphorus of 60% and the ammonium sulfate of 40% form by mass percentage.
The ammonium nitrate phosphorus being 60% by the mass percentage accounting for composite nitrogen fertilizer delivers to melting device through bucket elevator, and under 155 DEG C of conditions heating and melting, deliver to after the complete melting of ammonium nitrate phosphorus in the tower top tempering tank of prilling tower; The ammonium sulfate bucket elevator being 40% by the mass percentage through screening rises on prilling tower, and delivers in the tempering tank of tower top, is fully mixed and made into mixed slurry with the ammonium nitrate phosphorus of above-mentioned melting; Mixed slip is by run by gravity to prilling spry place, and prilling spry relies on the centrifugal force of its high speed rotating that mixed slurry is thrown away countless small dropletss; Small droplets in prilling tower in dropping process with the air inversion contact heat-exchanging that rises in tower, produce heat and mass effect each other, make small droplets progressively be frozen into solid particulate by liquid with the decline of temperature, the rotating speed of described shower nozzle is 35r/min; The solid particulate of last gained, after cooler fully cools, removes macrobead by vibratory screening apparatus, then carries out coating through coating machine and carry out anti-caking process, obtains the composite nitrogen fertilizer that particle diameter is 3mm, finally carries out being packaged to be finished product.
Embodiment 5
A kind of composite nitrogen fertilizer is that the ammonium nitrate phosphorus of 40% and the ammonium sulfate of 60% form by mass percentage.
The ammonium nitrate phosphorus being 40% by the mass percentage accounting for composite nitrogen fertilizer delivers to melting device through bucket elevator, and under 160 DEG C of conditions heating and melting, deliver to after the complete melting of ammonium nitrate phosphorus in the tower top tempering tank of prilling tower; The ammonium sulfate bucket elevator being 60% by the mass percentage through screening rises on prilling tower, and delivers in the tempering tank of tower top, is fully mixed and made into mixed slurry with the ammonium nitrate phosphorus of above-mentioned melting; Mixed slip is by run by gravity to prilling spry place, and prilling spry relies on the centrifugal force of its high speed rotating that mixed slurry is thrown away countless small dropletss; Small droplets in prilling tower in dropping process with the air inversion contact heat-exchanging that rises in tower, produce heat and mass effect each other, make small droplets progressively be frozen into solid particulate by liquid with the decline of temperature, the rotating speed of described shower nozzle is 40r/min; The solid particulate of last gained, after cooler fully cools, removes macrobead by vibratory screening apparatus, then carries out coating through coating machine and carry out anti-caking process, obtains the composite nitrogen fertilizer that particle diameter is 4.5mm, finally carries out being packaged to be finished product.
Embodiment 6
A kind of composite nitrogen fertilizer is that the ammonium nitrate phosphorus of 55% and the ammonium sulfate of 45% form by mass percentage.
The ammonium nitrate phosphorus being 55% by the mass percentage accounting for composite nitrogen fertilizer delivers to melting device through bucket elevator, and under 150 DEG C of conditions heating and melting, deliver to after the complete melting of ammonium nitrate phosphorus in the tower top tempering tank of prilling tower; The ammonium sulfate bucket elevator being 45% by the mass percentage through screening rises on prilling tower, and delivers in the tempering tank of tower top, is fully mixed and made into mixed slurry with the ammonium nitrate phosphorus of above-mentioned melting; Mixed slip is by run by gravity to prilling spry place, and prilling spry relies on the centrifugal force of its high speed rotating that mixed slurry is thrown away countless small dropletss; Small droplets in prilling tower in dropping process with the air inversion contact heat-exchanging that rises in tower, produce heat and mass effect each other, make small droplets progressively be frozen into solid particulate by liquid with the decline of temperature, the rotating speed of described shower nozzle is 39r/min; The solid particulate of last gained, after cooler fully cools, removes macrobead by vibratory screening apparatus, then carries out coating through coating machine and carry out anti-caking process, obtains the composite nitrogen fertilizer that particle diameter is 3.5mm, finally carries out being packaged to be finished product.
Claims (10)
1. a composite nitrogen fertilizer, is characterized in that, is that the ammonium nitrate phosphorus of 30% ~ 70% and the ammonium sulfate of 30% ~ 70% form by mass percentage.
2. composite nitrogen fertilizer according to claim 1, is characterized in that, described composite nitrogen fertilizer is that the ammonium nitrate phosphorus of 50% and the ammonium sulfate of 50% form by mass percentage.
3. composite nitrogen fertilizer according to claim 1, is characterized in that, described ammonium nitrate phosphorus is that the ammonium nitrate of 92% and the ammonium phosphate of 8% form by mass percentage.
4. composite nitrogen fertilizer according to claim 1, is characterized in that, described composite nitrogen fertilizer comprises the available nutrient of following massfraction: nitrogen 22% ~ 28%, sulphur 10% ~ 15% and phosphorus 0.5% ~ 5%.
5. composite nitrogen fertilizer according to claim 1, is characterized in that, the particle diameter of described composite nitrogen fertilizer is 2mm-4.75mm.
6. a preparation method for composite nitrogen fertilizer, is characterized in that, said method comprising the steps of:
A mass percentage is after the ammonium nitrate phosphorus heating and melting of 30% ~ 70% by (), deliver in the tower top tempering tank of prilling tower;
(b) mass percentage be 30% ~ 70% ammonium sulfate weigh after add in described tempering tank, fully make mixed slurry after mixing;
C () mixed slurry is sent into tablets press and is carried out sprinkling granulation, by the centrifugal force of tablets press shower nozzle high speed rotating, mixed slurry is thrown away small droplets, small droplets in prilling tower in dropping process with the air inversion contact heat-exchanging that rises in tower, small droplets is progressively frozen into solid particulate by liquid with the decline of temperature, and when dropping down onto at the bottom of tower, temperature is down to 45-65 DEG C;
D () solid particulate is through cooling, screening, anti-caking process, obtained particle diameter is the composite nitrogen fertilizer of 2mm-4.75mm.
7. the preparation method of composite nitrogen fertilizer according to claim 6, is characterized in that, the rotating speed of described shower nozzle is 35r/min-40r/min.
8. the preparation method of composite nitrogen fertilizer according to claim 6, is characterized in that, the temperature of described ammonium nitrate phosphorus phosphorus heating and melting is 145 DEG C ~ 165 DEG C.
9. the preparation method of composite nitrogen fertilizer according to claim 6, is characterized in that, described ammonium nitrate phosphorus is that the ammonium nitrate of 92% and the ammonium phosphate of 8% form by mass percentage.
10. the preparation method of composite nitrogen fertilizer according to claim 6, is characterized in that, described composite nitrogen fertilizer is that the ammonium nitrate phosphorus of 50% and the ammonium sulfate of 50% form by mass percentage.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110330385A (en) * | 2019-08-12 | 2019-10-15 | 河北百禾丰化肥有限公司 | A kind of modified high tower nitre sulfenyl fertilizer and its preparation process |
| CN110330384A (en) * | 2019-08-12 | 2019-10-15 | 河北百禾丰化肥有限公司 | A kind of environment-friendly type high tower nitre sulfenyl fertilizer and preparation method thereof |
| CN113979809A (en) * | 2021-11-19 | 2022-01-28 | 中化农业（临沂）研发中心有限公司 | Ammonium nitrate-sulfur quick-disintegrating compound fertilizer and preparation method thereof |
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| CN102992911A (en) * | 2012-12-31 | 2013-03-27 | 深圳市芭田生态工程股份有限公司 | Fertilizer and preparation method thereof |
| CN103193535A (en) * | 2013-04-18 | 2013-07-10 | 天津芦阳化肥股份有限公司 | Quick-acting slow-released compound fertilizer and preparation method thereof |
| CN103396222A (en) * | 2013-07-29 | 2013-11-20 | 瓮福（集团）有限责任公司 | Adhesive for producing granular ammonium sulfate |
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| CN101367682A (en) * | 2008-09-28 | 2009-02-18 | 中国-阿拉伯化肥有限公司 | Method for preparing complex fertilizer with mutual solution slip tubular reactor |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110330385A (en) * | 2019-08-12 | 2019-10-15 | 河北百禾丰化肥有限公司 | A kind of modified high tower nitre sulfenyl fertilizer and its preparation process |
| CN110330384A (en) * | 2019-08-12 | 2019-10-15 | 河北百禾丰化肥有限公司 | A kind of environment-friendly type high tower nitre sulfenyl fertilizer and preparation method thereof |
| CN113979809A (en) * | 2021-11-19 | 2022-01-28 | 中化农业（临沂）研发中心有限公司 | Ammonium nitrate-sulfur quick-disintegrating compound fertilizer and preparation method thereof |
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Application publication date: 20151014 |