CN1935748A - Method for producing compound fertilizer by high tower granulating - Google Patents
Method for producing compound fertilizer by high tower granulating Download PDFInfo
- Publication number
- CN1935748A CN1935748A CN 200610037389 CN200610037389A CN1935748A CN 1935748 A CN1935748 A CN 1935748A CN 200610037389 CN200610037389 CN 200610037389 CN 200610037389 A CN200610037389 A CN 200610037389A CN 1935748 A CN1935748 A CN 1935748A
- Authority
- CN
- China
- Prior art keywords
- urea
- prilling
- high tower
- composite fertilizer
- urinated
- 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.)
- Granted
Links
- 239000003337 fertilizer Substances 0.000 title claims abstract description 30
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 24
- 150000001875 compounds Chemical class 0.000 title claims abstract description 9
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims abstract description 37
- 239000004202 carbamide Substances 0.000 claims abstract description 37
- 238000000034 method Methods 0.000 claims abstract description 26
- 238000002844 melting Methods 0.000 claims abstract description 21
- 230000008018 melting Effects 0.000 claims abstract description 21
- 238000002156 mixing Methods 0.000 claims abstract description 13
- 239000002994 raw material Substances 0.000 claims abstract description 12
- 238000004537 pulping Methods 0.000 claims abstract description 9
- 238000005496 tempering Methods 0.000 claims description 23
- 239000002131 composite material Substances 0.000 claims description 22
- 230000004927 fusion Effects 0.000 claims description 15
- 238000005469 granulation Methods 0.000 claims description 11
- 230000003179 granulation Effects 0.000 claims description 11
- LFVGISIMTYGQHF-UHFFFAOYSA-N ammonium dihydrogen phosphate Chemical compound [NH4+].OP(O)([O-])=O LFVGISIMTYGQHF-UHFFFAOYSA-N 0.000 claims description 9
- 229910000387 ammonium dihydrogen phosphate Inorganic materials 0.000 claims description 9
- 238000006243 chemical reaction Methods 0.000 claims description 9
- 239000012768 molten material Substances 0.000 claims description 9
- 239000006012 monoammonium phosphate Substances 0.000 claims description 9
- 235000019837 monoammonium phosphate Nutrition 0.000 claims description 9
- PAWQVTBBRAZDMG-UHFFFAOYSA-N 2-(3-bromo-2-fluorophenyl)acetic acid Chemical compound OC(=O)CC1=CC=CC(Br)=C1F PAWQVTBBRAZDMG-UHFFFAOYSA-N 0.000 claims description 6
- 230000004048 modification Effects 0.000 claims description 5
- 238000012986 modification Methods 0.000 claims description 5
- WRUGWIBCXHJTDG-UHFFFAOYSA-L magnesium sulfate heptahydrate Chemical compound O.O.O.O.O.O.O.[Mg+2].[O-]S([O-])(=O)=O WRUGWIBCXHJTDG-UHFFFAOYSA-L 0.000 claims description 4
- 229940061634 magnesium sulfate heptahydrate Drugs 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 229910021538 borax Inorganic materials 0.000 claims description 3
- 210000003608 fece Anatomy 0.000 claims description 3
- 239000010871 livestock manure Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 239000004328 sodium tetraborate Substances 0.000 claims description 3
- 235000010339 sodium tetraborate Nutrition 0.000 claims description 3
- 239000007921 spray Substances 0.000 claims description 2
- 238000001816 cooling Methods 0.000 abstract description 6
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 229910019142 PO4 Inorganic materials 0.000 abstract 1
- 239000003795 chemical substances by application Substances 0.000 abstract 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 abstract 1
- 239000010452 phosphate Substances 0.000 abstract 1
- 238000005507 spraying Methods 0.000 abstract 1
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 239000000843 powder Substances 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 238000003756 stirring Methods 0.000 description 4
- 208000006558 Dental Calculus Diseases 0.000 description 3
- 235000019738 Limestone Nutrition 0.000 description 3
- 239000006028 limestone Substances 0.000 description 3
- 210000002700 urine Anatomy 0.000 description 3
- 238000009423 ventilation Methods 0.000 description 3
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 2
- 239000004114 Ammonium polyphosphate Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 235000019826 ammonium polyphosphate Nutrition 0.000 description 2
- 229920001276 ammonium polyphosphate Polymers 0.000 description 2
- QLULGSLAHXLKSR-UHFFFAOYSA-N azane;phosphane Chemical compound N.P QLULGSLAHXLKSR-UHFFFAOYSA-N 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 239000010459 dolomite Substances 0.000 description 2
- 229910000514 dolomite Inorganic materials 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- 229910021536 Zeolite Inorganic materials 0.000 description 1
- 235000019270 ammonium chloride Nutrition 0.000 description 1
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 description 1
- 229910052921 ammonium sulfate Inorganic materials 0.000 description 1
- 235000011130 ammonium sulphate Nutrition 0.000 description 1
- OHJMTUPIZMNBFR-UHFFFAOYSA-N biuret Chemical compound NC(=O)NC(N)=O OHJMTUPIZMNBFR-UHFFFAOYSA-N 0.000 description 1
- 239000011538 cleaning material Substances 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000002939 deleterious effect Effects 0.000 description 1
- 230000029087 digestion Effects 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 150000002828 nitro derivatives Chemical class 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000010457 zeolite Substances 0.000 description 1
Landscapes
- Fertilizers (AREA)
Abstract
The invention discloses a method for producing urea-base grain compound fertilizer by high-tower prilling, comprising pulping and prilling, where the pulping adopts three-step series continuous gradual cooling pulping method, comprising the steps of: adding fluxing agent and urea in a melting tank, melting the urea at low temperature and making the urea melt flow into the first stage mixing tank; in the first stage mixing tank, adding unreactable raw materials into the urea melt, and making the mixed melt flow into the second stage mixing tank; in the second stage mixing tank, adding in ammium phosphate and mixing for less than 4 min, and obtaining mixed melted pulp; spraying the mixed melted pulp through the double-speed rotating prilling nozzle of the high tower into a prilling tower to complete prilling. And it has advantages of low temperature operation, low energy consumption, low loss, good pulp fluidity, good operating environment. And the produced compound fertilizer grains are round, less broken and uniform.
Description
Technical field
The present invention relates to the production method of granular composite fertilizer, relate to the method that basic granular composite fertilizer is urinated in a kind of improved high tower prilling production specifically.
Background technology
At present, along with applying of high tower prilling technology, composite fertilizer is produced jumped onto a new step.As Chinese patent, the patent No. is CN03139601.1, this patent disclosure a kind of high tower prilling produce the method and apparatus of granular composite fertilizer.The urea-based compound fertilizer that adopts the high tower prilling technology to produce, because of its tool nutrient evenly, good water solubility and use range is wide, performance is much better than other kind chemical fertilizer etc. that advantage is welcome by the user deeply.The gordian technique of the tower production of composite fertilizer is a pulping process, and slip is feeding-up not only can't to flow in pipeline, more can't pass through the shower nozzle granulation.And in the prior art, when raw material is made melting charge slurry, a kind of is that like this, all raw materials are heat temperature raising all with all raw material mixing post-heating fusions, the temperature height that needs, and urea contacts in the fusion very first time with the phosphorus ammonium, and duration of contact is long, is easy to generate chemical reaction, cause urea decomposition and generate ammonium polyphosphate, its reaction is: (NH
2)
2CO+2NH
4H
2PO
4→ (NH
4)
2H
2P
2O
7+ CO
2+ 2NH
3, the result of this reaction causes mixture to produce foam, and its viscosity is sharply risen.Another kind is after urea melting is urine, adds through intensification levigated monoammonium phosphate, Repone K (or vitriolate of tartar), filler to stir pulping again.This method material temperature is high, and it is big that single-stage is mixed stirring intensity, is difficult for mixing.
Thereby the basic granular composite fertilizer high tower prilling of urine of the prior art technology has following shortcoming:
1, the temperature of reaction height causes nitrogen loss, and operating environment is poor.
2, the monoammonium phosphate extent of polymerization is big, and slip viscosity height increases and stirs and the tablets press load, and power consumption is big.
3, the slip viscosity is big, easy blocking sprayer, and product abnormity grain is many.
4, temperature of reaction height, duration of contact is long, and foam produces many, very easily emits pot.
5, prilling temperature height, the quick-fried grain of product is many, at the bottom of the easy sticking to the tower.
6, under equal cooling conditions, product easily hardens.
7, unclassified stores needs preheating except that urea, and is levigate, consumes steam.
8, single-stage mixing stirring intensity is big, is difficult for mixing, easily blocking sprayer.
9, single-stage is mixed the returning charge in the unfavorable process for producing, needs supporting common production line digestion returning charge, and investment cost is big.
Summary of the invention
The problem to be solved in the present invention provides the method that basic granular composite fertilizer is urinated in a kind of high tower prilling production that overcomes above-mentioned defective, and this method has advantages such as cold operation, less energy-consumption, slip good fluidity, good operational environment.
The technical scheme that solves the problems of the technologies described above is: the method for basic granular composite fertilizer is urinated in a kind of high tower prilling production, comprises slurrying, and granulation is characterized in that described slurrying is the pulping method of progressively lowering the temperature continuously of connecting in three steps, may further comprise the steps:
(1) in fusion tank, adds fusing assistant and urea, will flow into first step tempering tank behind the urea watery fusion;
(2) in first step tempering tank, in fused urea liquation, add not the normal temperature raw material with its reaction, the molten materials that obtains after mixing is flowed in the tempering tank of the second stage;
(3) in the tempering tank of the second stage, add the normal temperature monoammonium phosphate, mix the time less than 4 minutes with molten materials, obtain the mixed melting slip;
The mixed melting slip sprays by the prilling spry in the high tower, finishes granulation in tower.
Wherein, described fusing assistant is preferably one or more in modification ammonium nitrate, magnesium sulfate heptahydrate and the borax.The add-on of described fusing assistant whole materials (comprise fusing assistant, urea, not with the raw material and the monoammonium phosphate of urea liquation reaction) gross weight in account for 2-5%.
The temperature of watery fusion urea is between 120 ℃-125 ℃ in the step (1).
The temperature of molten materials is 100 ℃-120 ℃ in the step (2).
The temperature of mixed melting slip is 90 ℃-110 ℃ in the step (3).
Described prilling spry is preferably adjustable differential two-speed rotating granulation shower nozzle.
Describedly be not generally Repone K, vitriolate of tartar, ammonium chloride, ammonium sulfate, talcum powder, silica powder, zeolite powder, limestone powder, ground dolomite with the raw material of urea liquation reaction.Various proportion of raw materials are prior art, do not go through at this.
In fused urea liquation, also can add the returning charge in the compound manure production in the step (2).Returning charge in the compound manure production is generally cleaning material, product triage in the production.
The method that the present invention urinates basic granular composite fertilizer by the high tower prilling production of three steps series connection continuous pulping, has following advantage: 1. adopt fusing assistant to reduce the urea melting temperature, realize urea watery fusion (132.7 ℃ of urea fusing points), guarantee that Buwen's degree can be not too high down, reduce generation simultaneously the deleterious biuret of farm crop;
2. take urea melting liquid elder generation and the outer normal temperature raw material pre-mixing of dephosphorization ammonium are further reduced slurry temperature, reduce the nitrogen consume;
3. just add normal temperature phosphorus ammonium in the tempering tank of the second stage, mixing time is less than 4 minutes, thereby avoids urea decomposition and generate ammonium polyphosphate.
4. other raw materials of second, third grade adding all are normal temperature raw materials, save steam, guarantee the low temperature granulation.
In a word, the method for basic granular composite fertilizer is urinated in high tower prilling production of the present invention, has the cold operation of realization, less energy-consumption, low-loss; The slip good fluidity, good operational environment, advantage such as help improving the quality of products, the urine base granular composite fertilizer particle of producing with this method is mellow and full, broken kernel is few, even.
Present method is changing under the melt mix temperature according to the characteristics of ammonium nitrate or modification ammonium nitrate, and monoammonium phosphate, filler are added first step tempering tank, and vitriolate of tartar adds second stage tempering tank, can realize the production of high tower nitro-compound fertilizer.The three step series connection pulping method of progressively lowering the temperature continuously also can be used for the production of oil cooling granulated compound fertilizer.
Embodiment
The present invention is described further by the following examples.
Embodiment 1
Add fusing assistant modification ammonium nitrate 20kg and urea 330kg at the fusion groove, with urea melting (132.7 ℃ of urea fusing points), the urea after the fusion flows into first step tempering tank naturally under 120 ℃ of temperature.Adding temperature again in first step tempering tank is the Repone K 240kg and the limestone powder 310kg of normal temperature, mixes, and the temperature that obtains molten materials is 105 ℃, and it is flow in the tempering tank of the second stage naturally.Adding temperature again in the tempering tank of the second stage is the monoammonium phosphate 100kg of normal temperature, the mixed time is 3 minutes, the temperature that obtains the mixed melting slip is about 98 ℃, at last, above-mentioned mixed melting slip is entered in the prilling tower by the rotary prilling spry sprinkling of the adjustable differential two-speed of high tower middle and upper part, under the natural ventilation cooling, finish granulation.Prepared N16.82%, the P of containing
2O
55.08%, K
2O 14.40%, and each index all meets the composite fertilizer that is difficult for hardening of GB15063-2001.
Embodiment 2
Add fusing assistant modification ammonium nitrate and magnesium sulfate heptahydrate by 1: 1 (weight ratio) common 35kg and urea 360kg at the fusion groove, with urea melting, the urea after the fusion flows into first step tempering tank naturally under 125 ℃ of temperature.Adding temperature again in first step tempering tank is Repone K 370kg and the limestone powder 125kg and the returning charge of normal temperature, mixes, and the temperature that obtains molten materials is 115 ℃, and it is flow in the tempering tank of the second stage naturally.Adding temperature again in the tempering tank of the second stage is the monoammonium phosphate 110kg of normal temperature, the mixed time is 3 minutes, the temperature that obtains the mixed melting slip is about 105 ℃, at last, above-mentioned mixed melting slip is entered in the prilling tower by the rotary prilling spry sprinkling of the adjustable differential two-speed of high tower middle and upper part, under the natural ventilation cooling, finish granulation.Prepared N18.22%, the P of containing
2O
55.57%, K
2O 22.20%, and each index all meets the composite fertilizer that is difficult for hardening of GB15063-2001.
Embodiment 3
Add fusing assistant magnesium sulfate heptahydrate and borax by 1: 1 (weight ratio) common 30kg and urea 330kg at the fusion groove, with urea melting, the urea after the fusion flows into first step tempering tank naturally under 123 ℃ of temperature.Adding temperature again in first step tempering tank is Repone K 340kg and the ground dolomite 200kg and the returning charge of normal temperature, mixes, and the temperature that obtains molten materials is 110 ℃, and it is flow in the tempering tank of the second stage naturally.Adding temperature again in the tempering tank of the second stage is the monoammonium phosphate 100kg of normal temperature, the mixed time is 3 minutes, the temperature that obtains the mixed melting slip is about 95 ℃, at last, above-mentioned mixed melting slip is entered in the prilling tower by the rotary prilling spry sprinkling of the adjustable differential two-speed of high tower middle and upper part, under the natural ventilation cooling, finish granulation.Prepared N 16.50%, the P of containing
2O
55.0%, K
2O 20.40%, and each index all meets the composite fertilizer that is difficult for hardening of GB15063-2001.
Claims (8)
1. the method that basic granular composite fertilizer is urinated in high tower prilling production comprises slurrying, and granulation is characterized in that described slurrying is the pulping method of progressively lowering the temperature continuously of connecting in three steps, and it may further comprise the steps:
(1) in fusion tank, adds fusing assistant and urea, will flow into first step tempering tank behind the urea watery fusion;
(2) in first step tempering tank, in fused urea liquation, add not the normal temperature raw material with its reaction, the molten materials that obtains after mixing is flowed in the tempering tank of the second stage;
(3) in the tempering tank of the second stage, add the normal temperature monoammonium phosphate, mix the time less than 4 minutes with molten materials, obtain the mixed melting slip;
The mixed melting slip sprays by the prilling spry in the high tower, finishes granulation in tower.
2. the method for basic granular composite fertilizer is urinated in high tower prilling production according to claim 1, it is characterized in that, described fusing assistant is one or more in modification ammonium nitrate, magnesium sulfate heptahydrate and the borax.
3. the method for basic granular composite fertilizer is urinated in high tower prilling production according to claim 1, it is characterized in that, the add-on of described fusing assistant accounts for 2-5% in the gross weight of whole materials.
4. the method for basic granular composite fertilizer is urinated in high tower prilling production according to claim 1, it is characterized in that, the temperature of watery fusion urea is between 120 ℃-125 ℃ in the step (1).
5. the method for basic granular composite fertilizer is urinated in high tower prilling production according to claim 1, it is characterized in that, the temperature of molten materials is 100 ℃-120 ℃ in the step (2).
6. the method for basic granular composite fertilizer is urinated in high tower prilling production according to claim 1, it is characterized in that, the temperature of mixed melting slip is 90 ℃-110 ℃ in the step (3).
7. the method for basic granular composite fertilizer is urinated in high tower prilling production according to claim 1, it is characterized in that, also can add the returning charge in the compound manure production in the step (2) in fused urea liquation.
8. the method that basic granular composite fertilizer is urinated in arbitrary described high tower prilling production according to claim 1-7 is characterized in that, described prilling spry is adjustable differential two-speed rotating granulation shower nozzle.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100373892A CN100537489C (en) | 2006-08-31 | 2006-08-31 | Method for producing compound fertilizer by high tower granulating |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100373892A CN100537489C (en) | 2006-08-31 | 2006-08-31 | Method for producing compound fertilizer by high tower granulating |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1935748A true CN1935748A (en) | 2007-03-28 |
| CN100537489C CN100537489C (en) | 2009-09-09 |
Family
ID=37953520
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|---|---|---|---|
| CNB2006100373892A Active CN100537489C (en) | 2006-08-31 | 2006-08-31 | Method for producing compound fertilizer by high tower granulating |
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Cited By (14)
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|---|---|---|---|---|
| CN102424616A (en) * | 2011-09-09 | 2012-04-25 | 广东拉多美化肥有限公司 | Full water-soluble urea-based composite fertilizer and preparation method thereof |
| CN101580413B (en) * | 2008-05-14 | 2012-05-23 | 陕西世纪景源化工有限公司 | Systematic integration optimization method based on high tower fused melt granulated compound fertilizer technology |
| CN102584395A (en) * | 2012-02-15 | 2012-07-18 | 瓮福（集团）有限责任公司 | Method for producing urea-based compound fertilizer by high tower granulation |
| CN102633553A (en) * | 2012-04-27 | 2012-08-15 | 深圳市芭田生态工程股份有限公司 | Method for producing high-tower ammonium phosphate compound fertilizer |
| CN102875219A (en) * | 2012-11-08 | 2013-01-16 | 史丹利化肥股份有限公司 | High-tower urea formaldehyde controlled release compound fertilizer and preparation method thereof |
| CN102951948A (en) * | 2012-11-13 | 2013-03-06 | 深圳市芭田生态工程股份有限公司 | Technological method for producing compound fertilizer by high tower melting method |
| CN104030752A (en) * | 2014-05-16 | 2014-09-10 | 贵港市芭田生态有限公司 | Production method of water-soluble fertilizer containing trace elements |
| CN105777281A (en) * | 2016-04-15 | 2016-07-20 | 史丹利化肥（平原）有限公司 | Tower sulfur-based compound fertilizer and preparing method thereof |
| CN106008003A (en) * | 2016-05-31 | 2016-10-12 | 史丹利化肥扶余有限公司 | High tower granulation produced high concentration compound fertilizer and production method thereof |
| CN106278715A (en) * | 2016-08-03 | 2017-01-04 | 郑州帝益肥业生态保护工程股份有限公司 | High-tower granulation water conservation soil-loosening function fertilizer and production technology thereof |
| CN106268483A (en) * | 2016-08-29 | 2017-01-04 | 河南心连心化肥有限公司 | The preparation facilities of a kind of compound fertilizer mixed slurry and preparation method |
| CN108069879A (en) * | 2016-11-17 | 2018-05-25 | 湖北富来地金润肥业有限公司 | Potassium chloride reduces the preparation method of urea fusing point |
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| CN117430471A (en) * | 2023-10-23 | 2024-01-23 | 嘉施利（应城）化肥有限公司 | Urine-based slow-release compound fertilizer generated by high tower granulation process and preparation method thereof |
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| CN1410400A (en) * | 2001-10-10 | 2003-04-16 | 包文婷 | Technological method of producing composite fertilizer using low temp. fusion |
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| CN101580413B (en) * | 2008-05-14 | 2012-05-23 | 陕西世纪景源化工有限公司 | Systematic integration optimization method based on high tower fused melt granulated compound fertilizer technology |
| CN102424616A (en) * | 2011-09-09 | 2012-04-25 | 广东拉多美化肥有限公司 | Full water-soluble urea-based composite fertilizer and preparation method thereof |
| CN102424616B (en) * | 2011-09-09 | 2013-09-04 | 广东拉多美化肥有限公司 | Full water-soluble urea-based composite fertilizer and preparation method thereof |
| CN102584395B (en) * | 2012-02-15 | 2013-11-13 | 瓮福（集团）有限责任公司 | Method for producing urea-based compound fertilizer by high tower granulation |
| CN102584395A (en) * | 2012-02-15 | 2012-07-18 | 瓮福（集团）有限责任公司 | Method for producing urea-based compound fertilizer by high tower granulation |
| CN102633553A (en) * | 2012-04-27 | 2012-08-15 | 深圳市芭田生态工程股份有限公司 | Method for producing high-tower ammonium phosphate compound fertilizer |
| CN102875219A (en) * | 2012-11-08 | 2013-01-16 | 史丹利化肥股份有限公司 | High-tower urea formaldehyde controlled release compound fertilizer and preparation method thereof |
| CN102951948B (en) * | 2012-11-13 | 2014-08-13 | 深圳市芭田生态工程股份有限公司 | Technological method for producing compound fertilizer by high tower melting method |
| CN102951948A (en) * | 2012-11-13 | 2013-03-06 | 深圳市芭田生态工程股份有限公司 | Technological method for producing compound fertilizer by high tower melting method |
| CN104030752A (en) * | 2014-05-16 | 2014-09-10 | 贵港市芭田生态有限公司 | Production method of water-soluble fertilizer containing trace elements |
| CN105777281A (en) * | 2016-04-15 | 2016-07-20 | 史丹利化肥（平原）有限公司 | Tower sulfur-based compound fertilizer and preparing method thereof |
| CN106008003A (en) * | 2016-05-31 | 2016-10-12 | 史丹利化肥扶余有限公司 | High tower granulation produced high concentration compound fertilizer and production method thereof |
| CN106278715A (en) * | 2016-08-03 | 2017-01-04 | 郑州帝益肥业生态保护工程股份有限公司 | High-tower granulation water conservation soil-loosening function fertilizer and production technology thereof |
| CN106268483A (en) * | 2016-08-29 | 2017-01-04 | 河南心连心化肥有限公司 | The preparation facilities of a kind of compound fertilizer mixed slurry and preparation method |
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| CN112321372A (en) * | 2020-11-26 | 2021-02-05 | 新洋丰农业科技股份有限公司 | Method for adding enzymolysis seaweed extract into urea-based high-tower compound fertilizer |
| CN117430471A (en) * | 2023-10-23 | 2024-01-23 | 嘉施利（应城）化肥有限公司 | Urine-based slow-release compound fertilizer generated by high tower granulation process and preparation method thereof |
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