CN105859379A - Production method for slow-release chemical fertilizer - Google Patents
Production method for slow-release chemical fertilizer Download PDFInfo
- Publication number
- CN105859379A CN105859379A CN201610188956.8A CN201610188956A CN105859379A CN 105859379 A CN105859379 A CN 105859379A CN 201610188956 A CN201610188956 A CN 201610188956A CN 105859379 A CN105859379 A CN 105859379A
- Authority
- CN
- China
- Prior art keywords
- chemical fertilizer
- fertilizer
- sulphur
- coating
- sulfur
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 239000003337 fertilizer Substances 0.000 title claims abstract description 91
- 239000000126 substance Substances 0.000 title claims abstract description 61
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 21
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 59
- 239000011248 coating agent Substances 0.000 claims abstract description 33
- 238000000576 coating method Methods 0.000 claims abstract description 33
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 24
- 239000011593 sulfur Substances 0.000 claims abstract description 24
- 239000002245 particle Substances 0.000 claims abstract description 22
- 239000002994 raw material Substances 0.000 claims abstract description 18
- 239000000565 sealant Substances 0.000 claims abstract description 11
- 238000005469 granulation Methods 0.000 claims abstract description 6
- 230000003179 granulation Effects 0.000 claims abstract description 6
- 239000005864 Sulphur Substances 0.000 claims description 35
- 239000008187 granular material Substances 0.000 claims description 24
- 238000002844 melting Methods 0.000 claims description 23
- 230000008018 melting Effects 0.000 claims description 23
- 238000010422 painting Methods 0.000 claims description 23
- 239000000463 material Substances 0.000 claims description 15
- 239000004698 Polyethylene Substances 0.000 claims description 10
- 230000004927 fusion Effects 0.000 claims description 10
- 239000012188 paraffin wax Substances 0.000 claims description 10
- -1 polyethylene Polymers 0.000 claims description 10
- 229920000573 polyethylene Polymers 0.000 claims description 10
- 238000007789 sealing Methods 0.000 claims description 10
- 238000005987 sulfurization reaction Methods 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 8
- 239000002131 composite material Substances 0.000 claims description 7
- YUWBVKYVJWNVLE-UHFFFAOYSA-N [N].[P] Chemical group [N].[P] YUWBVKYVJWNVLE-UHFFFAOYSA-N 0.000 claims description 5
- XAQHXGSHRMHVMU-UHFFFAOYSA-N [S].[S] Chemical compound [S].[S] XAQHXGSHRMHVMU-UHFFFAOYSA-N 0.000 claims description 5
- 239000003795 chemical substances by application Substances 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 5
- 239000000155 melt Substances 0.000 claims description 5
- 239000005995 Aluminium silicate Substances 0.000 claims description 3
- 239000000443 aerosol Substances 0.000 claims description 3
- 235000012211 aluminium silicate Nutrition 0.000 claims description 3
- 239000000440 bentonite Substances 0.000 claims description 3
- 229910000278 bentonite Inorganic materials 0.000 claims description 3
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 3
- 239000010459 dolomite Substances 0.000 claims description 3
- 229910000514 dolomite Inorganic materials 0.000 claims description 3
- 239000000428 dust Substances 0.000 claims description 3
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 2
- 238000005507 spraying Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 8
- 239000002689 soil Substances 0.000 abstract description 2
- 235000015097 nutrients Nutrition 0.000 abstract 2
- 230000003750 conditioning effect Effects 0.000 abstract 1
- 238000005265 energy consumption Methods 0.000 abstract 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 3
- 239000004202 carbamide Substances 0.000 description 3
- 230000002459 sustained effect Effects 0.000 description 2
- 238000013268 sustained release Methods 0.000 description 2
- 239000012730 sustained-release form Substances 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 239000003905 agrochemical Substances 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000014075 nitrogen utilization Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05B—PHOSPHATIC FERTILISERS
- C05B17/00—Other phosphatic fertilisers, e.g. soft rock phosphates, bone meal
-
- 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
- C05G3/90—Mixtures of one or more fertilisers with additives not having a specially fertilising activity for affecting the nitrification of ammonium compounds or urea in the soil
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G5/00—Fertilisers characterised by their form
- C05G5/30—Layered or coated, e.g. dust-preventing coatings
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Pest Control & Pesticides (AREA)
- Soil Sciences (AREA)
- Fertilizers (AREA)
Abstract
The invention provides a production method for a slow-release chemical fertilizer. The method comprises the following production steps: preheating of raw materials, coating of sulfur, coating of a sealant, and conditioning so as to prepare a sulfur-coated slow-release chemical fertilizer, etc. The production method provided by the invention integrates the process of coating granulation and the process of product after-treatment, simplifies production flow, reduces energy consumption, and has low investment and operation costs; meanwhile, the sulfur-coated slow-release chemical fertilizer produced by utilizing the method provided by the invention has mellow and smooth particle appearance and high particle compressive strength; after the fertilizer is applied, the overall release rate of fertilizer nutrients is greatly reduced, and the overall utilization rate of the fertilizer nutrients can be greatly improved; meanwhile, the sulfur element needed by a plurality of agricultural, forestry and economic crops in soil can be supplemented; and the number of times of fertilizer application is reduced, so labor is saved.
Description
[technical field]
The present invention relates to the production method of a kind of slow release chemical fertilizer, belong to agrochemical technical field.
[background technology]
Chemical fertilizer produces important to China's grain security.Scholarly forecast is along with to grain rigidity
The increase of demand, the production of chemical fertilizer will keep quick growth.Data shows, China's chemical fertilizer
Nitrogen utilization efficiency only has 30～35%, and major part is lost by approach such as runoff, seepage and volatilizations
?.Chemical fertilizer utilization ratio is low, and loss is serious, has both caused the energy, the wasting of resources and economic loss,
Causing again environmental degradation, this problem has become as the bottleneck problem of agricultural sustainable development.
To this end, slow-release fertilizer is widely used in agricultural, but current slow-release fertilizer produces
Inefficiency, cost is high.
Need to provide the production method of a kind of slow release chemical fertilizer for solving above-mentioned technical problem.
[summary of the invention]
The invention aims to overcome the defect of prior art, it is provided that the life of a kind of slow release chemical fertilizer
Product method, technical process is simple, and production cost is low, goes for various factory that makes urea with multiple
Hefei factory.
The present invention for achieving the above object, by the following technical solutions:
A kind of production method of slow release chemical fertilizer, including step:
Step one, preheating material: preheat in granular chemical fertilizer is placed in rotary drum curtain comminutor,
The preheating temperature of described granular chemical fertilizer controls between 70～85 DEG C, and described granular chemical fertilizer is nitrogen phosphorus
K composite fertilizer particle；
Step 2, coating sulphur: industrial sulphur is placed in fusion apparatus heating, makes molten sulfur
Sulphur, the melt temperature of described melted sulphur controls between 120～150 DEG C, makes preheated
Granulation is fertile forms material heavy curtain, by melted sulphur being sprayed on equably in rotary drum curtain comminutor
Fertile particle surface, is formed and is coated with sulfur granules chemical fertilizer, and coating temperature controls between 20～100 DEG C, sulphur
Coating weight is the 10～28% of raw material fertilizer weight；
Step 3, coating sealant: industrial machinery oil or industrial paraffin are placed in polyethylene mixture
Fusion apparatus heats, makes melting sealed dose, the industrial machinery oil in described melting sealed dose
Or the weight percent proportioning of industrial paraffin and polyethylene is 90～60: 10～40, melting sealed dose melt
Melt temperature and control between 50～120 DEG C, make painting sulfur granules chemical fertilizer be formed in rotary drum curtain comminutor
Material heavy curtain, is sprayed on melting sealed dose the fertile particle surface of painting sulfuration equably, forms sealing and be coated with
Sulfur granules chemical fertilizer, coating temperature controls between 65～85 DEG C, and sealant coating weight is raw material fertilizer
The 1～3% of weight；
Step 4, nurse one's health into product: after painting sulfur granules chemical fertilizer to be sealed is cooled to less than 30 DEG C, logical
Cross dispenser in comminutor, add conditioner, be coated with sulfuration fertile particle surface one layer of tune of covering sealing
Reason agent, makes painting sulphur slow release chemical fertilizer product, and wherein, conditioner addition is raw material fertilizer weight
0～1%.
Preferably, the conditioner described in step 4 is kaolin, dolomite dust, bentonite, diatom
The mixture of one or more in soil.
Preferably, described melted sulphur and the spraying method of melting sealed dose are pressure type or aerosol
Formula.
The production method of a kind of slow release chemical fertilizer that the present invention provides, manufactured painting sulphur sustained releaseization out
Fertile granule strength is greatly improved than the granule strength of raw material fertilizer, produces sustained release multipurpose fertilizer,
Technical process is simple, and production cost is low, goes for various factory that makes urea and composite heat transfer
Factory.
[detailed description of the invention]
Embodiment one
A kind of production method of slow release chemical fertilizer, including step:
Step one, preheating material: preheat in granular chemical fertilizer is placed in rotary drum curtain comminutor,
The preheating temperature of described granular chemical fertilizer controls between 75～85 DEG C, and described granular chemical fertilizer is nitrogen phosphorus
K composite fertilizer particle；
Step 2, coating sulphur: industrial sulphur is placed in fusion apparatus heating, makes molten sulfur
Sulphur, the melt temperature of described melted sulphur controls between 120～130 DEG C, makes preheated
Granulation is fertile forms material heavy curtain, by melted sulphur being sprayed on equably in rotary drum curtain comminutor
Fertile particle surface, is formed and is coated with sulfur granules chemical fertilizer, and coating temperature controls between 20～50 DEG C, sulphur
Coating weight is the 10～28% of raw material fertilizer weight；
Step 3, coating sealant: industrial machinery oil or industrial paraffin are placed in polyethylene mixture
Fusion apparatus heats, makes melting sealed dose, the industrial machinery oil in described melting sealed dose
Or the weight percent proportioning of industrial paraffin and polyethylene is 90～60: 10～40, melting sealed dose melt
Melt temperature and control between 50～70 DEG C, make painting sulfur granules chemical fertilizer be formed in rotary drum curtain comminutor
Material heavy curtain, is sprayed on melting sealed dose the fertile particle surface of painting sulfuration equably, forms sealing and be coated with
Sulfur granules chemical fertilizer, coating temperature controls between 65～75 DEG C, and sealant coating weight is raw material fertilizer
The 1～3% of weight；
Step 4, nurse one's health into product: after painting sulfur granules chemical fertilizer to be sealed is cooled to less than 15 DEG C, logical
Cross dispenser in comminutor, add conditioner, be coated with sulfuration fertile particle surface one layer of tune of covering sealing
Reason agent, makes painting sulphur slow release chemical fertilizer product, and wherein, conditioner addition is raw material fertilizer weight
0～1%.
Embodiment two
A kind of production method of slow release chemical fertilizer, including step:
Step one, preheating material: preheat in granular chemical fertilizer is placed in rotary drum curtain comminutor,
The preheating temperature of described granular chemical fertilizer controls between 75～85 DEG C, and described granular chemical fertilizer is nitrogen phosphorus
K composite fertilizer particle；
Step 2, coating sulphur: industrial sulphur is placed in fusion apparatus heating, makes molten sulfur
Sulphur, the melt temperature of described melted sulphur controls between 130～135 DEG C, makes preheated
Granulation is fertile forms material heavy curtain, by melted sulphur being sprayed on equably in rotary drum curtain comminutor
Fertile particle surface, is formed and is coated with sulfur granules chemical fertilizer, and coating temperature controls between 20～50 DEG C, sulphur
Coating weight is the 10～28% of raw material fertilizer weight；
Step 3, coating sealant: industrial machinery oil or industrial paraffin are placed in polyethylene mixture
Fusion apparatus heats, makes melting sealed dose, the industrial machinery oil in described melting sealed dose
Or the weight percent proportioning of industrial paraffin and polyethylene is 90～60: 10～40, melting sealed dose melt
Melt temperature and control between 70～90 DEG C, make painting sulfur granules chemical fertilizer be formed in rotary drum curtain comminutor
Material heavy curtain, is sprayed on melting sealed dose the fertile particle surface of painting sulfuration equably, forms sealing and be coated with
Sulfur granules chemical fertilizer, coating temperature controls between 65～75 DEG C, and sealant coating weight is raw material fertilizer
The 1～3% of weight；
Step 4, nurse one's health into product: after painting sulfur granules chemical fertilizer to be sealed is cooled to less than 25 DEG C, logical
Cross dispenser in comminutor, add conditioner, be coated with sulfuration fertile particle surface one layer of tune of covering sealing
Reason agent, makes painting sulphur slow release chemical fertilizer product, and wherein, conditioner addition is raw material fertilizer weight
0～1%.
Embodiment three
A kind of production method of slow release chemical fertilizer, including step:
Step one, preheating material: preheat in granular chemical fertilizer is placed in rotary drum curtain comminutor,
The preheating temperature of described granular chemical fertilizer controls between 70～75 DEG C, and described granular chemical fertilizer is nitrogen phosphorus
K composite fertilizer particle；
Step 2, coating sulphur: industrial sulphur is placed in fusion apparatus heating, makes molten sulfur
Sulphur, the melt temperature of described melted sulphur controls between 135～150 DEG C, makes preheated
Granulation is fertile forms material heavy curtain, by melted sulphur being sprayed on equably in rotary drum curtain comminutor
Fertile particle surface, is formed and is coated with sulfur granules chemical fertilizer, and coating temperature controls between 60～100 DEG C, sulphur
Coating weight is the 10～28% of raw material fertilizer weight；
Step 3, coating sealant: industrial machinery oil or industrial paraffin are placed in polyethylene mixture
Fusion apparatus heats, makes melting sealed dose, the industrial machinery oil in described melting sealed dose
Or the weight percent proportioning of industrial paraffin and polyethylene is 90～60: 10～40, melting sealed dose melt
Melt temperature and control between 95～120 DEG C, make painting sulfur granules chemical fertilizer be formed in rotary drum curtain comminutor
Material heavy curtain, is sprayed on melting sealed dose the fertile particle surface of painting sulfuration equably, forms sealing and be coated with
Sulfur granules chemical fertilizer, coating temperature controls between 75～85 DEG C, and sealant coating weight is raw material fertilizer
The 1～3% of weight；
Step 4, nurse one's health into product: after painting sulfur granules chemical fertilizer to be sealed is cooled to less than 45 DEG C, logical
Cross dispenser in comminutor, add conditioner, be coated with sulfuration fertile particle surface one layer of tune of covering sealing
Reason agent, makes painting sulphur slow release chemical fertilizer product, and wherein, conditioner addition is raw material fertilizer weight
0～1%.
In a preferred embodiment of the invention, the conditioner described in preferred steps four be kaolin,
The mixture of one or more in dolomite dust, bentonite, diatomite.
In a preferred embodiment of the invention, preferably described melted sulphur and the spray of melting sealed dose
Painting mode is pressure type or aerosol.
The production method of a kind of slow release chemical fertilizer that the present invention provides, manufactured painting sulphur sustained releaseization out
Fertile granule strength is greatly improved than the granule strength of raw material fertilizer, produces sustained release multipurpose fertilizer,
Technical process is simple, and production cost is low, goes for various factory that makes urea and composite heat transfer
Factory.
The above only lists the way of realization of present inventive concept, and protection scope of the present invention is not
The concrete form that embodiment is stated should be seen as limited by, all in the spirit and principles in the present invention
Within, any modification, equivalent substitution and improvement etc. made, should be included in the protection of the present invention
Within the scope of.
Claims (3)
1. the production method of a slow release chemical fertilizer, it is characterised in that include step:
Step one, preheating material: preheat in granular chemical fertilizer is placed in rotary drum curtain comminutor,
The preheating temperature of described granular chemical fertilizer controls between 70～85 DEG C, and described granular chemical fertilizer is nitrogen phosphorus
K composite fertilizer particle；
Step 2, coating sulphur: industrial sulphur is placed in fusion apparatus heating, makes molten sulfur
Sulphur, the melt temperature of described melted sulphur controls between 120～150 DEG C, makes preheated
Granulation is fertile forms material heavy curtain, by melted sulphur being sprayed on equably in rotary drum curtain comminutor
Fertile particle surface, is formed and is coated with sulfur granules chemical fertilizer, and coating temperature controls between 20～100 DEG C, sulphur
Coating weight is the 10～28% of raw material fertilizer weight；
Step 3, coating sealant: industrial machinery oil or industrial paraffin are placed in polyethylene mixture
Fusion apparatus heats, makes melting sealed dose, the industrial machinery oil in described melting sealed dose
Or the weight percent proportioning of industrial paraffin and polyethylene is 90～60: 10～40, melting sealed dose melt
Melt temperature and control between 50～120 DEG C, make painting sulfur granules chemical fertilizer be formed in rotary drum curtain comminutor
Material heavy curtain, is sprayed on melting sealed dose the fertile particle surface of painting sulfuration equably, forms sealing and be coated with
Sulfur granules chemical fertilizer, coating temperature controls between 65～85 DEG C, and sealant coating weight is raw material fertilizer
The 1～3% of weight；
Step 4, nurse one's health into product: after painting sulfur granules chemical fertilizer to be sealed is cooled to less than 30 DEG C, logical
Cross dispenser in comminutor, add conditioner, be coated with sulfuration fertile particle surface one layer of tune of covering sealing
Reason agent, makes painting sulphur slow release chemical fertilizer product, and wherein, conditioner addition is raw material fertilizer weight
0～1%.
The production method of slow release chemical fertilizer the most according to claim 1, it is characterised in that: step
Conditioner described in rapid four be the one in kaolin, dolomite dust, bentonite, diatomite or
Several mixtures.
The production method of slow release chemical fertilizer the most according to claim 1, it is characterised in that: institute
The melted sulphur stated and the spraying method of melting sealed dose are pressure type or aerosol.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610188956.8A CN105859379A (en) | 2016-03-29 | 2016-03-29 | Production method for slow-release chemical fertilizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610188956.8A CN105859379A (en) | 2016-03-29 | 2016-03-29 | Production method for slow-release chemical fertilizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105859379A true CN105859379A (en) | 2016-08-17 |
Family
ID=56627277
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610188956.8A Withdrawn CN105859379A (en) | 2016-03-29 | 2016-03-29 | Production method for slow-release chemical fertilizer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105859379A (en) |
-
2016
- 2016-03-29 CN CN201610188956.8A patent/CN105859379A/en not_active Withdrawn
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1177777C (en) | Improved polymer-sulphur-polymer coating fertilizer | |
| US8211201B2 (en) | Controlled release fertilizers and methods of manufacture | |
| CN100475752C (en) | A kind of slow-release compound fertilizer production method and its equipment and products | |
| CN104710213A (en) | Rounded grain potash fertilizer production method | |
| CN103626592B (en) | Preparation of coating agent and application of coating agent to sustained-release fertilizer | |
| CN102503696A (en) | Preparation method for particle compound fertilizer | |
| CN101857484A (en) | Preparation of slow-release enveloped fertilizer | |
| CN102408277B (en) | Hightower pelletization slow-release long-acting high-phosphorus sulfenyl compound fertilizer and preparation method thereof | |
| CN1274642C (en) | Process for preparing sulphur-coating release controlled fertilizer | |
| CN102432374A (en) | Melt biomass composite potassium sulfate type slow-release fertilizer and preparation method thereof | |
| CN100410213C (en) | Complex fertilizer production method without drying process | |
| CN104355778A (en) | Potassium fertilizer granules and granulating method thereof | |
| CN103739386B (en) | Compound manure of a kind of containing water-soluble silicon and preparation method thereof | |
| CN102432401B (en) | Tower-granulated slow-release long-acting sulfenyl nitrogen and phosphorus compound fertilizer and preparation method thereof | |
| CN102816019A (en) | Fertilizer special for canola | |
| CN102417426A (en) | Method for preparing sulfur resin spraying type slow controlled release fertilizer | |
| CN101125784A (en) | Fused mass granulating technique for composite fertilizer | |
| CN105859379A (en) | Production method for slow-release chemical fertilizer | |
| CN102320901B (en) | Melt biomass compound chlorine-based slow-release fertilizer and preparation method thereof | |
| CN102617254B (en) | Emulsion in water for enhancing efficacy of nitrogen fertilizer, and application of emulsion in water | |
| CN101165012B (en) | High tower slow release composite fertilizer containing ureaformaldehyde and producing method thereof | |
| CN101077844A (en) | Method for producing composite fertilizer needed no drying | |
| CN102603386B (en) | Preparation method of high-tower granulation slow-release long-acting sulfur-based nitrogen-phosphorus compound fertilizer | |
| CN104072260A (en) | Multifunctional production system for compound fertilizer | |
| CN202898254U (en) | Equipment for producing compound fertilizer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20160817 |
|
| WW01 | Invention patent application withdrawn after publication |