CN107188769A - A kind of slow release chemical fertilizer and preparation method based on desulfurated plaster - Google Patents
A kind of slow release chemical fertilizer and preparation method based on desulfurated plaster Download PDFInfo
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- CN107188769A CN107188769A CN201710419376.XA CN201710419376A CN107188769A CN 107188769 A CN107188769 A CN 107188769A CN 201710419376 A CN201710419376 A CN 201710419376A CN 107188769 A CN107188769 A CN 107188769A
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- China
- Prior art keywords
- chemical fertilizer
- desulfurated plaster
- slow release
- hollow ball
- ball
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- 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.)
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Classifications
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05D—INORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C; FERTILISERS PRODUCING CARBON DIOXIDE
- C05D3/00—Calcareous fertilisers
- C05D3/02—Calcareous fertilisers from limestone, calcium carbonate, calcium hydrate, slaked lime, calcium oxide, waste calcium 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
-
- 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
- C05G3/80—Soil conditioners
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Organic Chemistry (AREA)
- Pest Control & Pesticides (AREA)
- Soil Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Fertilizers (AREA)
Abstract
The invention belongs to chemical fertilizer manufacturing technology field, there is provided a kind of slow release chemical fertilizer based on desulfurated plaster and preparation method, the slow release chemical fertilizer based on desulfurated plaster has spherical structure, the spherical structure includes sphere layer and ball center layer, sphere layer is desulfurated plaster micron order hollow ball, the medicine ball that ball center layer is made up of chemical fertilizer and absorbent material.Desulfurated plaster micron order hollow ball is placed in the vacuum tank being evacuated, gas in hollow ball is suctioned out chemical fertilizer and absorbent material is injected into vacuum tank, is well mixed；Gradually reduction vacuum makes chemical fertilizer be sucked into absorbent material among desulfurated plaster micron order hollow ball to atmospheric pressure state, you can.The present invention is conducive to the sustainable development of resource using the method for solid desulfurated plaster, and chemical fertilizer acquisition time trip, water retention is high.
Description
Technical field
The invention belongs to chemical fertilizer manufacturing technology field, in particular it relates to a kind of slow release chemical fertilizer and system based on desulfurated plaster
Preparation Method.
Background technology
Desulfurated plaster is the accessory substance of coal-fired industry, is the chemical industry pair invention that flue gas desulfurization is produced, mainly by two crystallizations
The calcium sulfate composition of water.China is coal-fired big country, and coal fired power generation amount accounts for the 80% of gross generation, and coal fire discharged a large amount of is contained
The flue gas of sulfur dioxide, severe contamination environment, therefore state compulsion regulation thermal power plant and other are necessary in type coal combustion equipment
Install flue gas desulfurization device additional, the sulfur method mainly used is Wet Limestone/plastering and equipment, although alleviate flue gas
Pollution of the middle sulfur dioxide to air, but generate substantial amounts of solid waste desulfurated plaster again simultaneously, to soil, water source, big
The problem of pollution of gas and land purchase are put.
Slow release chemical fertilizer meets environmental protection and the requirement of agricultural sustainable development, is the developing direction of world agriculture chemical fertilizer,
Slow-release or control-release fertilizer, which has, once to be applied, the characteristics of discharge for a long time, can accomplish one season crop only need single-dose application, saved peasant's
Fertilising and management cost, along with the reduction of fertilizers input amount, slow-release or control-release fertilizer is applied cost and also greatly reduced.Its
Middle coating type sustained-release chemical fertilizer is the main flow of slow release chemical fertilizer from now on.
The coating layer in conventional coated slow release fertilizer is generally high molecular polymer at present, such as Chinese invention patent（Application number
200910076188.7）Coating layer is used as using polystyrene.Content of organics needed for such slow-release material is higher, causes into
This height, and production process needs toxic organic solvents, compared with difficult degradation in soil, is also easy to produce secondary pollution.In order to overcome with
Upper shortcoming, slow release chemical fertilizer starts using inorganic material as clad.Chinese invention patent（Application number 200910006123.5）
Disclose using amino resins-expanded graphite compound as coated fertilizer, although the method can reduce secondary pollution, have
Interface bond strength is low between machine-inorganic, and broken, slow release effect is poor, and the method drugloading rate is smaller, and chemical fertilizer is only embedded in hole
Surface.
The content of the invention
For defect of the prior art, the purpose of the present invention be on the one hand to provide it is a kind of with low cost, based on desulfurization stone
Slow release chemical fertilizer of cream and preparation method thereof.On the one hand a kind of method for preparing the slow release chemical fertilizer based on desulfurated plaster is also provided.
A kind of slow release chemical fertilizer based on desulfurated plaster provided according to an aspect of the present invention, it is described slow based on desulfurated plaster
Releasing chemical fertilizer has spherical structure, and the spherical structure includes sphere layer and ball center layer, and sphere layer is hollow for desulfurated plaster micron order
Ball, the medicine ball that ball center layer is made up of chemical fertilizer and absorbent material.
Preferably, the sphere layer is the desulfurated plaster micron order hollow ball of Surface coating organic coating material.
Preferably, the diameter of the desulfurated plaster micron order hollow ball is at 200-250 μm, and hollow ball thickness degree is hollow ball
The 7-10% of diameter, hollow ball layer surface has nanometer to micron order aperture, and the size in aperture is 2-15 μm.
Preferably, the organic coating material is one or more of mixing in alginate, epoxy resin, cyclodextrin
Thing.
Preferably, the weight ratio of the organic coating material and chemical fertilizer is 1：10.
Preferably, the sphere layer also includes pozzolanic activity material, cinder powder and adhesive in addition to desulfurated plaster.
Preferably, the mass ratio of the desulfurated plaster, pozzolanic activity material, cinder powder and adhesive is 30：8：9：1.
On the one hand a kind of preparation method of the slow release chemical fertilizer based on desulfurated plaster provided, it is described slow based on desulfurated plaster
The preparation method for releasing chemical fertilizer comprises the following steps：
Step（1）：Desulfurated plaster micron order hollow ball is placed in the vacuum tank being evacuated, by gas in hollow ball
Suction out and chemical fertilizer and absorbent material are injected into vacuum tank, be well mixed；
Step（2）：Gradually reduction vacuum makes chemical fertilizer be sucked into desulfurated plaster micron order with absorbent material empty to atmospheric pressure state
Among bulbus cordis, you can.
Compared with prior art, the present invention has following beneficial effect：
（1）The invention provides a kind of method of utilization solid desulfurated plaster, be conducive to the sustainable development of resource.With carbon black,
The inorganic slow-release material such as bentonite is compared, and the cavity drugloading rate in desulfurization gypsum hollow ball is larger, and sphere layer surface nanometer
It is controllable to micron order aperture, more preferable regulating and controlling effect is played to the sustained release of chemical fertilizer；
（2）With coating method prepare slow release layer occur between membrane wrapping thickness heterogeneity and chemical fertilizer combine weaker, intensity compared with
Low, crackly shortcoming is compared, and the shell structure that desulfurization gypsum hollow ball has is more uniform, and intensity is higher, in transport, handling
And routine fertilization operation in be not in fracture phenomena；
（3）Desulfurization gypsum hollow ball and high absorbency material in the present invention, can be with all with higher water suction, water retention property
Outside slow release chemical fertilizer, play a part of improved soil, have preferable application prospect in arid, water shortage or the big area of evaporation capacity.
Especially after fertilizer slow release is complete, desulfurization gypsum hollow ball can also still play a part of improved soil.Before reducing
The cumbersome process for applying water-loss reducer, slow release fertilizer is brought is respectively necessary for, human cost is reduced；
（4）Combination of the desulfurated plaster sphere layer with preferably resistance fertilizer, and external ball surface layer closed material, is further increased
Slow release effect.It can obtain difference by adjusting the size in sphere layer surface aperture and the content of aperture closed material and release simultaneously
Put the slow release chemical fertilizer of phase；
（5）High-absorbent material in desulfurization gypsum hollow ball, further increases the water absorbing capacity of desulfurization gypsum hollow ball.With it
He compares high water absorption slow-release material, and the presence of inorganic spheres surface layer structure can avoid volumetric expansion to the rupture of high-absorbent material from causing
The prominent of chemical fertilizer release；
（6）Raw material sources of the present invention are wide, and technique is simple, with wide application prospect.
Embodiment
With reference to specific embodiment, the present invention is expanded on further.It should be understood that these embodiments are merely to illustrate the present invention
Rather than limitation the scope of the present invention.
The purpose of the present invention be on the one hand to provide it is a kind of with low cost, based on the slow release chemical fertilizer of desulfurated plaster and its preparation side
Method.On the one hand a kind of method for preparing the slow release chemical fertilizer based on desulfurated plaster is also provided.
A kind of slow release chemical fertilizer based on desulfurated plaster provided according to an aspect of the present invention, it is described slow based on desulfurated plaster
Releasing chemical fertilizer has spherical structure, and the spherical structure includes sphere layer and ball center layer, and sphere layer is hollow for desulfurated plaster micron order
Ball, the medicine ball that ball center layer is made up of chemical fertilizer and absorbent material.
Preferably, the sphere layer is the desulfurated plaster micron order hollow ball of Surface coating organic coating material.
Preferably, the diameter of the desulfurated plaster micron order hollow ball is at 200-250 μm, and hollow ball thickness degree is hollow ball
The 7-10% of diameter, hollow ball layer surface has nanometer to micron order aperture, and the size in aperture is 2-15 μm.
Preferably, the organic coating material is one or more of mixing in alginate, epoxy resin, cyclodextrin
Thing.
Preferably, the weight ratio of the organic coating material and chemical fertilizer is 1：10.
Preferably, the sphere layer also includes pozzolanic activity material, cinder powder and adhesive in addition to desulfurated plaster.
Preferably, the mass ratio of the desulfurated plaster, pozzolanic activity material, cinder powder and adhesive is 30：8：9：1.
On the one hand a kind of preparation method of the slow release chemical fertilizer based on desulfurated plaster provided, it is described slow based on desulfurated plaster
The preparation method for releasing chemical fertilizer comprises the following steps：
Step（1）：Desulfurated plaster micron order hollow ball is placed in the vacuum tank being evacuated, by gas in hollow ball
Suction out and chemical fertilizer and absorbent material are injected into vacuum tank, be well mixed；
Step（2）：Gradually reduction vacuum makes chemical fertilizer be sucked into desulfurated plaster micron order with absorbent material empty to atmospheric pressure state
Among bulbus cordis, you can.
Compared with prior art, the present invention has following beneficial effect：
（1）The invention provides a kind of method of utilization solid desulfurated plaster, be conducive to the sustainable development of resource.With carbon black,
The inorganic slow-release material such as bentonite is compared, and the cavity drugloading rate in desulfurization gypsum hollow ball is larger, and sphere layer surface nanometer
It is controllable to micron order aperture, more preferable regulating and controlling effect is played to the sustained release of chemical fertilizer；
（2）With coating method prepare slow release layer occur between membrane wrapping thickness heterogeneity and chemical fertilizer combine weaker, intensity compared with
Low, crackly shortcoming is compared, and the shell structure that desulfurization gypsum hollow ball has is more uniform, and intensity is higher, in transport, handling
And routine fertilization operation in be not in fracture phenomena；
（3）Desulfurization gypsum hollow ball and high absorbency material in the present invention, can be with all with higher water suction, water retention property
Outside slow release chemical fertilizer, play a part of improved soil, have preferable application prospect in arid, water shortage or the big area of evaporation capacity.
Especially after fertilizer slow release is complete, desulfurization gypsum hollow ball can also still play a part of improved soil.Before reducing
The cumbersome process for applying water-loss reducer, slow release fertilizer is brought is respectively necessary for, human cost is reduced；
（4）Combination of the desulfurated plaster sphere layer with preferably resistance fertilizer, and external ball surface layer closed material, is further increased
Slow release effect.It can obtain difference by adjusting the size in sphere layer surface aperture and the content of aperture closed material and release simultaneously
Put the slow release chemical fertilizer of phase；
（5）High-absorbent material in desulfurization gypsum hollow ball, further increases the water absorbing capacity of desulfurization gypsum hollow ball.With it
He compares high water absorption slow-release material, and the presence of inorganic spheres surface layer structure can avoid volumetric expansion to the rupture of high-absorbent material from causing
The prominent of chemical fertilizer release；
（6）Raw material sources of the present invention are wide, and technique is simple, with wide application prospect.
Embodiment 1
A kind of slow release chemical fertilizer based on desulfurated plaster that on the one hand the present embodiment provides, the sustained release based on desulfurated plaster
Fertilizer has spherical structure, and the spherical structure includes sphere layer and ball center layer, and sphere layer is desulfurated plaster micron order hollow ball, ball
The medicine ball that central layer is made up of chemical fertilizer and absorbent material.
The sphere layer is the desulfurated plaster micron order hollow ball of Surface coating organic coating material.
The diameter of the desulfurated plaster micron order hollow ball is at 250 μm, and hollow ball thickness degree is the 7% of hollow bulb diameter, empty
Bulbus cordis layer surface has nanometer to micron order aperture, and the size in aperture is 15 μm.
The organic coating material is one or more of mixtures in alginate, epoxy resin, cyclodextrin.
The weight ratio of the organic coating material and chemical fertilizer is 1：10.
The sphere layer also includes pozzolanic activity material, cinder powder and adhesive in addition to desulfurated plaster.
The desulfurated plaster, pozzolanic activity material, the mass ratio of cinder powder and adhesive are 30：8：9：1.
On the one hand a kind of preparation method of the slow release chemical fertilizer based on desulfurated plaster provided, it is described slow based on desulfurated plaster
The preparation method for releasing chemical fertilizer comprises the following steps：
Step（1）：Desulfurated plaster micron order hollow ball is placed in the vacuum tank being evacuated, by gas in hollow ball
Suction out and chemical fertilizer and absorbent material are injected into vacuum tank, be well mixed；
Step（2）：Gradually reduction vacuum makes chemical fertilizer be sucked into desulfurated plaster micron order with absorbent material empty to atmospheric pressure state
Among bulbus cordis, you can.
The chemical fertilizer acquisition time of the slow release chemical fertilizer based on desulfurated plaster is 20 days made from the present embodiment, and water retention is 36%, is released
Put the phase and water retention is above common coating slow release chemical fertilizer.
Embodiment 2
A kind of slow release chemical fertilizer based on desulfurated plaster that on the one hand the present embodiment provides, the slow release chemical fertilizer based on desulfurated plaster
With spherical structure, the spherical structure includes sphere layer and ball center layer, and sphere layer is desulfurated plaster micron order hollow ball, the centre of sphere
The medicine ball that layer is made up of chemical fertilizer and absorbent material.
The sphere layer is the desulfurated plaster micron order hollow ball of Surface coating organic coating material.
The diameter of the desulfurated plaster micron order hollow ball is at 200 μm, and hollow ball thickness degree is the 10% of hollow bulb diameter,
Hollow ball layer surface has nanometer to micron order aperture, and the size in aperture is 2 μm.
The organic coating material is one or more of mixtures in alginate, epoxy resin, cyclodextrin.
The weight ratio of the organic coating material and chemical fertilizer is 1：10.
The sphere layer also includes pozzolanic activity material, cinder powder and adhesive in addition to desulfurated plaster.
The desulfurated plaster, pozzolanic activity material, the mass ratio of cinder powder and adhesive are 30：8：9：1.
On the one hand a kind of preparation method of the slow release chemical fertilizer based on desulfurated plaster provided, it is described slow based on desulfurated plaster
The preparation method for releasing chemical fertilizer comprises the following steps：
Step（1）：Desulfurated plaster micron order hollow ball is placed in the vacuum tank being evacuated, by gas in hollow ball
Suction out and chemical fertilizer and absorbent material are injected into vacuum tank, be well mixed；
Step（2）：Gradually reduction vacuum makes chemical fertilizer be sucked into desulfurated plaster micron order with absorbent material empty to atmospheric pressure state
Among bulbus cordis, you can.
The chemical fertilizer acquisition time of the slow release chemical fertilizer based on desulfurated plaster is 21 days made from the present embodiment, and water retention is 37%, is released
Put the phase and water retention is above common coating slow release chemical fertilizer.
Embodiment 3
A kind of slow release chemical fertilizer based on desulfurated plaster that on the one hand the present embodiment provides, the slow release chemical fertilizer based on desulfurated plaster
With spherical structure, the spherical structure includes sphere layer and ball center layer, and sphere layer is desulfurated plaster micron order hollow ball, the centre of sphere
The medicine ball that layer is made up of chemical fertilizer and absorbent material.
The sphere layer is the desulfurated plaster micron order hollow ball of Surface coating organic coating material.
The diameter of the desulfurated plaster micron order hollow ball is at 220 μm, and hollow ball thickness degree is the 8% of hollow bulb diameter, empty
Bulbus cordis layer surface has nanometer to micron order aperture, and the size in aperture is 8 μm.
The organic coating material is one or more of mixtures in alginate, epoxy resin, cyclodextrin.
The weight ratio of the organic coating material and chemical fertilizer is 1：10.
The sphere layer also includes pozzolanic activity material, cinder powder and adhesive in addition to desulfurated plaster.
The desulfurated plaster, pozzolanic activity material, the mass ratio of cinder powder and adhesive are 30：8：9：1.
On the one hand a kind of preparation method of the slow release chemical fertilizer based on desulfurated plaster provided, it is described slow based on desulfurated plaster
The preparation method for releasing chemical fertilizer comprises the following steps：
Step（1）：Desulfurated plaster micron order hollow ball is placed in the vacuum tank being evacuated, by gas in hollow ball
Suction out and chemical fertilizer and absorbent material are injected into vacuum tank, be well mixed；
Step（2）：Gradually reduction vacuum makes chemical fertilizer be sucked into desulfurated plaster micron order with absorbent material empty to atmospheric pressure state
Among bulbus cordis, you can.
The chemical fertilizer acquisition time of the slow release chemical fertilizer based on desulfurated plaster is 24 days made from the present embodiment, and water retention is 35%, is released
Put the phase and water retention is above common coating slow release chemical fertilizer.
The specific embodiment of the present invention is described above.It is to be appreciated that the invention is not limited in above-mentioned
Particular implementation, those skilled in the art can make various deformations or amendments within the scope of the claims, this not shadow
Ring the substantive content of the present invention.
Claims (8)
1. a kind of slow release chemical fertilizer based on desulfurated plaster, it is characterised in that：The slow release chemical fertilizer based on desulfurated plaster has ball
Shape structure, the spherical structure include sphere layer and ball center layer, sphere layer be desulfurated plaster micron order hollow ball, ball center layer be by
The medicine ball that chemical fertilizer is constituted with absorbent material.
2. the slow release chemical fertilizer according to claim 1 based on desulfurated plaster, it is characterised in that：The sphere layer is surface bag
It is covered with the desulfurated plaster micron order hollow ball of machine covering material.
3. the slow release chemical fertilizer according to claim 1 based on desulfurated plaster, it is characterised in that：The desulfurated plaster micron order
The diameter of hollow ball is at 200-250 μm, and hollow ball thickness degree is the 7-10% of hollow bulb diameter, and hollow ball layer surface has nanometer extremely
Micron order aperture, the size in aperture is 2-15 μm.
4. the slow release chemical fertilizer according to claim 2 based on desulfurated plaster, it is characterised in that：The organic coating material is
One or more of mixtures in alginate, epoxy resin, cyclodextrin.
5. the slow release chemical fertilizer according to claim 1 based on desulfurated plaster, it is characterised in that：The organic coating material with
The weight ratio of chemical fertilizer is 1：10.
6. the slow release chemical fertilizer according to claim 1 based on desulfurated plaster, it is characterised in that：The sphere layer is except desulfurization
Also include pozzolanic activity material, cinder powder and adhesive outside gypsum.
7. the slow release chemical fertilizer according to claim 6 based on desulfurated plaster, it is characterised in that：The desulfurated plaster, volcano
The mass ratio of grey active material, cinder powder and adhesive is 30：8：9：1.
8. the preparation method of the slow release chemical fertilizer based on desulfurated plaster as described in claim any one of 1-7, it is characterised in that：Bag
Include following steps：
Step（1）：Desulfurated plaster micron order hollow ball is placed in the vacuum tank being evacuated, by gas in hollow ball
Suction out and chemical fertilizer and absorbent material are injected into vacuum tank, be well mixed；
Step（2）：Gradually reduction vacuum makes chemical fertilizer be sucked into desulfurated plaster micron order with absorbent material empty to atmospheric pressure state
Among bulbus cordis, you can.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710419376.XA CN107188769A (en) | 2017-06-06 | 2017-06-06 | A kind of slow release chemical fertilizer and preparation method based on desulfurated plaster |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710419376.XA CN107188769A (en) | 2017-06-06 | 2017-06-06 | A kind of slow release chemical fertilizer and preparation method based on desulfurated plaster |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107188769A true CN107188769A (en) | 2017-09-22 |
Family
ID=59877176
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201710419376.XA Withdrawn CN107188769A (en) | 2017-06-06 | 2017-06-06 | A kind of slow release chemical fertilizer and preparation method based on desulfurated plaster |
Country Status (1)
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| CN (1) | CN107188769A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1253127A (en) * | 1998-11-06 | 2000-05-17 | 金维续 | Process for preparing slowly released chemical nitrogen fertilizer |
| CN103043988A (en) * | 2012-12-21 | 2013-04-17 | 江门市慧信净水材料有限公司 | Production process of nanometer porous ecological brick |
| CN103333033A (en) * | 2013-06-24 | 2013-10-02 | 西南科技大学 | Preparation method of low formaldehyde resin-gypsum-bentonite-based controlled release fertilizer |
| CN103570463A (en) * | 2013-10-30 | 2014-02-12 | 清华大学 | Water-retention and slow-release fertilizer based on coal gangue micron-grade hollow sphere and preparation method of fertilizer |
| CN103880550A (en) * | 2014-03-27 | 2014-06-25 | 清华大学 | Slow-release fertilizer prepared by using hollow ceramic micro-bead coating method and preparation method thereof |
| CN106673830A (en) * | 2016-12-27 | 2017-05-17 | 盐城工学院 | Three-layer enveloping type high-water-absorption slow release fertilizer and preparation method thereof |
-
2017
- 2017-06-06 CN CN201710419376.XA patent/CN107188769A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1253127A (en) * | 1998-11-06 | 2000-05-17 | 金维续 | Process for preparing slowly released chemical nitrogen fertilizer |
| CN103043988A (en) * | 2012-12-21 | 2013-04-17 | 江门市慧信净水材料有限公司 | Production process of nanometer porous ecological brick |
| CN103333033A (en) * | 2013-06-24 | 2013-10-02 | 西南科技大学 | Preparation method of low formaldehyde resin-gypsum-bentonite-based controlled release fertilizer |
| CN103570463A (en) * | 2013-10-30 | 2014-02-12 | 清华大学 | Water-retention and slow-release fertilizer based on coal gangue micron-grade hollow sphere and preparation method of fertilizer |
| CN103880550A (en) * | 2014-03-27 | 2014-06-25 | 清华大学 | Slow-release fertilizer prepared by using hollow ceramic micro-bead coating method and preparation method thereof |
| CN106673830A (en) * | 2016-12-27 | 2017-05-17 | 盐城工学院 | Three-layer enveloping type high-water-absorption slow release fertilizer and preparation method thereof |
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Application publication date: 20170922 |