CN107141065A - A kind of self-curing film-coated controlled release fertilizer and preparation method thereof - Google Patents
A kind of self-curing film-coated controlled release fertilizer and preparation method thereof Download PDFInfo
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- CN107141065A CN107141065A CN201710338546.1A CN201710338546A CN107141065A CN 107141065 A CN107141065 A CN 107141065A CN 201710338546 A CN201710338546 A CN 201710338546A CN 107141065 A CN107141065 A CN 107141065A
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- fertilizer
- controlled release
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05B—PHOSPHATIC FERTILISERS
- C05B7/00—Fertilisers based essentially on alkali or ammonium orthophosphates
-
- 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
-
- 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
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- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Pest Control & Pesticides (AREA)
- Soil Sciences (AREA)
- Fertilizers (AREA)
Abstract
The invention discloses a kind of preparation method of self-curing film-coated controlled release fertilizer, urea granules are added in granulating disc first, spraying into appropriate atomized water makes its moistened surface, then well mixed attapulgite clay is added, urea, potassium dihydrogen phosphate powder adds sodium alginate powder, sodium alginate powder is set to be wrapped in fertilizer kernel outer layer, then the calcium chloride solution that concentration is 5% is sprayed into granulated fertilizer, then spray into glue, glue is set to be evenly distributed on the surface of granulated fertilizer, then, slaked lime powder is sprayed in granulated fertilizer surface, continue to rotate untill granulated fertilizer is by uniform coat, finally, the granulated fertilizer being wrapped by is dried and sieved, it can be made into self-curing film-coated controlled release fertilizer.The carrier of attapulgite clay as fertilizer is used for the preparation of slow release fertilizer by the present invention, can reduce the preparation cost of slow release fertilizer, while can be played a role in terms of simplifying preparation technology, providing trace element.
Description
Technical field
The present invention relates to technical field of fertilizers, a kind of self-curing film-coated controlled release fertilizer and its preparation side are more particularly related to
Method.
Background technology
The speed of nitrogenous fertilizer based on urea, its nitre solution and ammonification quickly, among current proportion of crop planting, is often made
It is superfluous into early stage nitrogenous fertilizer, excessive growth is caused, and the later stage is de- fertile, current China's utilization rate of nitrogen fertilizer only has 30%.The hair of sustained-controll-release fertiliser
Exhibition is extremely urgent.Slow-release or control-release fertilizer, with chemical fertilizer utilization ratio is improved, reduces chemical fertilizer as a kind of new high-tech product of environment-friendly type
Usage amount and fertilizer application frequency, save labour, reduce environmental pollution, and the advantages of improving quality of agricultural product, is the skill that applies fertilizers scientifically
The carrier of art and Fertilizer development a trend.
The type of film-coated controlled release fertilizer mainly has both at home and abroad at present：Inorganic matter coated fertilizer and organic polymer films fertilizer two
Major class.The inorganic matter coated fertilizer country is mainly with ground phosphate rock, calcium magnesium phosphate, sulphur, talcum powder, land plaster, flyash, organic
Or inorganic cementitious material is as coated fertilizer, although these inorganic coating fertilizer will not produce pollution and cheap, letter is made
It is single, but nutrient controlled release properties are poor, and nitrogen utilization efficiency is low, and applied once, which is easily caused crop, de- fertile phenomenon in the later stage；Net is outer main
Will with sulfur-coated urea (SCU) be representative, although its price is not high and coating is nutrient necessary to crop, there is also
Nutrient hardly possible, which discharges, sulphur coating is oxidizable crushes, largely applies the problem of easily causing soil acidification for a long time.These shortcomings limit this
The development of class fertilizer.
Organic polymer coated fertilizer can be divided into thermoplasticity and the two kinds of film-coated controlled release fertilizer of thermosetting resin, such
Product controlled release properties are preferable.The release and release control fertilizer of thermoplastic resin membrane wrapping with Japan " Meister " be representative, thermosetting resin bag
Main " Osmocote " with the U.S. of the release and release control fertilizer of film is representative.This kind of film-coated controlled release fertilizer is first by coating resin with molten mostly
Coating is carried out using fluidized-bed process after agent dissolving.Although this technique film is uniform, its high energy consumption, the most poisonous and difficulty of solvent
With whole recovery, the pollution of workshop and surrounding environment is easily caused, and complex process is difficult to produce in enormous quantities；In state
Interior, organic polymer coated fertilizer is with Chinese patent CN 1569773 (200410024049.7) the thermosetting epoxy resin bags
Film release and release control fertilizer is representative, and the more above-mentioned organic polymer coated fertilizer of this patent solves coating process complexity, organic solvent pair
The problem of workshop and its ambient contamination, but the common drawback of this kind of fertilizer is：The biological non-degradable of a, coated fertilizer,
Easily cause " white pollution ", b, production cost are high.C, applicable crop narrow range, are only applicable to garden crop, lawn, Gao Er
Husband court and ornamental plant etc..
The content of the invention
It is an object of the invention to overcome the shortcomings of that current film-coated controlled release fertilizer is present to delay control there is provided a kind of self-curing coating
Release fertilizer and preparation method thereof, is used for the preparation of slow release fertilizer, so as to reduce into using the carrier of attapulgite clay as fertilizer
Originally, played a role in terms of simplified preparation technology, offer trace element.
The present invention is achieved in that a kind of preparation method of self-curing film-coated controlled release fertilizer, including prepares in fertilizer
Core and preparation two processes of slow controlled release layer；
1) fertilizer kernel is prepared：1.0-2.0mm urea granules are added in granulating disc, spraying into appropriate atomized water makes
Its moistened surface, then in the case where granulating disc rotates, addition compares 3 with weight:6:5 well mixed concave convex rods are sticked
Soil, urea, potassium dihydrogen phosphate powder, make mix powder be wrapped in urea granules outer layer, obtain fertilizer kernel；
2) slow controlled release layer is prepared：Appropriate atomized water is sprayed into again, then adds sea in the case where granulating disc rotates
Alginate powder, makes sodium alginate powder be wrapped in fertilizer kernel outer layer, then sprays into the chlorination that concentration is 5% to granulated fertilizer
Calcium solution, then sprays into glue, glue is evenly distributed on the surface of granulated fertilizer, and then, slaked lime powder is sprayed in particle
Fertilizer surface, continues to rotate untill granulated fertilizer is by uniform coat, finally, the granulated fertilizer being wrapped by is dried and sieved,
It can be made into self-curing film-coated controlled release fertilizer.
Preferably, the weight ratio of the granulated fertilizer, glue and slaked lime powder three is 70：0.5-0.8：20~25.
Preferably, the glue is the marine alga sol solution of concentration 8%.
Present invention also offers a kind of self-curing film-coated controlled release fertilizer prepared using above-mentioned preparation method.
Relative to prior art, the present invention has the advantages that：
The invention provides a kind of self-curing film-coated controlled release fertilizer and preparation method thereof, attapulgite clay is regard as fertilizer
Carrier be used for slow release fertilizer preparation, the preparation cost of slow release fertilizer can be reduced, at the same can simplify preparation technology, carry
For being played a role in terms of trace element.
Embodiment
Technical scheme is clearly and completely described below in conjunction with embodiment, it is clear that described reality
It is only a part of embodiment of the invention to apply example, rather than whole embodiments.Based on the embodiment in the present invention, this area is general
The every other embodiment that logical technical staff is obtained under the premise of creative work is not made, belongs to what the present invention was protected
Scope.
Following examples are raw materials used as do not done specified otherwise, are commercially available prod.
Embodiment 1
The present embodiment carries out the preparation of self-curing film-coated controlled release fertilizer, and method is as follows：
Step 1：1.0-2.0mm urea granules are added in granulating disc, spraying into appropriate atomized water moistens its surface
Wet, then in the case where granulating disc rotates, addition compares 3 with weight:6:5 well mixed attapulgite clays, urea, phosphorus
Acid dihydride potassium powder, makes mix powder be wrapped in urea granules outer layer, obtains fertilizer kernel；
Step 2：Appropriate atomized water is sprayed into again, then adds sodium alginate powder in the case where granulating disc rotates
End, makes sodium alginate powder be wrapped in fertilizer kernel outer layer, then sprays into the calcium chloride solution that concentration is 5% to fertiliser granulates,
Sodium alginate is crosslinked, the sodium alginate after crosslinking then sprays into the marine alga peptization of concentration 8% as fertilizer internal layer coating
Liquid, makes marine alga sol solution be evenly distributed on the surface of granulated fertilizer, then, and slaked lime powder is sprayed in granulated fertilizer surface, after
Continuous rotation is untill granulated fertilizer is by uniform coat, finally, and the granulated fertilizer being wrapped by is dried and sieved, you can be made from solid
Change film-coated controlled release fertilizer.In the present embodiment, the weight ratio of granulated fertilizer, marine alga sol solution and slaked lime powder three is
70：0.5：20, the granulated fertilizer mentioned in weight ratio is the particle weight before penetrating calcium chloride solution herein.
Embodiment 2
The present embodiment carries out the preparation of self-curing film-coated controlled release fertilizer, and method is as follows：
Step 1：1.0-2.0mm urea granules are added in granulating disc, spraying into appropriate atomized water moistens its surface
Wet, then in the case where granulating disc rotates, addition compares 3 with weight:6:5 well mixed attapulgite clays, urea, phosphorus
Acid dihydride potassium powder, makes mix powder be wrapped in urea granules outer layer, obtains fertilizer kernel；
Step 2：Appropriate atomized water is sprayed into again, then adds sodium alginate powder in the case where granulating disc rotates
End, makes sodium alginate powder be wrapped in fertilizer kernel outer layer, then sprays into the calcium chloride solution that concentration is 5% to fertiliser granulates,
Sodium alginate is crosslinked, the sodium alginate after crosslinking then sprays into the marine alga peptization of concentration 8% as fertilizer internal layer coating
Liquid, makes marine alga sol solution be evenly distributed on the surface of granulated fertilizer, then, and slaked lime powder is sprayed in granulated fertilizer surface, after
Continuous rotation is untill granulated fertilizer is by uniform coat, finally, and the granulated fertilizer being wrapped by is dried and sieved, you can be made from solid
Change film-coated controlled release fertilizer.In the present embodiment, the weight ratio of granulated fertilizer, marine alga sol solution and slaked lime powder three is
70：0.6：25, the granulated fertilizer mentioned in weight ratio is the particle weight before penetrating calcium chloride solution herein.
Embodiment 3
The present embodiment carries out the preparation of self-curing film-coated controlled release fertilizer, and method is as follows：
Step 1：1.0-2.0mm urea granules are added in granulating disc, spraying into appropriate atomized water moistens its surface
Wet, then in the case where granulating disc rotates, addition compares 3 with weight:6:5 well mixed attapulgite clays, urea, phosphorus
Acid dihydride potassium powder, makes mix powder be wrapped in urea granules outer layer, obtains fertilizer kernel；
Step 2：Appropriate atomized water is sprayed into again, then adds sodium alginate powder in the case where granulating disc rotates
End, makes sodium alginate powder be wrapped in fertilizer kernel outer layer, then sprays into the calcium chloride solution that concentration is 5% to fertiliser granulates,
Sodium alginate is crosslinked, the sodium alginate after crosslinking then sprays into the marine alga peptization of concentration 8% as fertilizer internal layer coating
Liquid, makes marine alga sol solution be evenly distributed on the surface of granulated fertilizer, then, and slaked lime powder is sprayed in granulated fertilizer surface, after
Continuous rotation is untill granulated fertilizer is by uniform coat, finally, and the granulated fertilizer being wrapped by is dried and sieved, you can be made from solid
Change film-coated controlled release fertilizer.In the present embodiment, the weight ratio of granulated fertilizer, marine alga sol solution and slaked lime powder three is
70：0.8：25, the granulated fertilizer mentioned in weight ratio is the particle weight before penetrating calcium chloride solution herein.
Attapulgite clay is the chain layered silicate clay mineral that a kind of one-dimensional square is nanostructured, with larger ratio
Surface area and cation exchange capacity.In addition, wherein contain abundant element, including potassium, phosphorus, calcium, magnesium, silicon, iron and manganese etc..By
There are special physicochemical properties in attapulgite clay, obtained wide in terms of oil, chemical industry, papermaking, building materials, medicine
General application.Attapulgite clay has abundant reserves in China, is distributed mainly on the provinces such as Jiangsu, Anhui, Gansu.
In order to improve the utilization rate of fertilizer and reduce the environmental pollution due to excessively applying fertilizer and bringing, the embodiment of the present invention is carried
Supply a kind of preparation method of self-curing film-coated controlled release fertilizer, carrier of the preparation method using attapulgite clay as fertilizer,
Urea, potassium dihydrogen phosphate are embedded in the kernel in attapulgite clay matrix as fertilizer, sodium alginate is used as fertilizer internal layer bag
Film, using slaked lime powder as slow controlled release layer, carries out the preparation of slow release fertilizer, prepared fertilizer sample size tunable system is in 2.5-
Between 4mm, mean compressive strength is up to more than 28N, while the usage amount of marine alga sol solution can be reduced.By to the self-curing bag
The performance of membrane controlled release fertilizer is studied, and draws to draw a conclusion：Fertilizer prepared by embodiment 1-3 has preferably sustained release effect
Really, the release percentage of nutrient nitrogen, phosphorus, potassium in 60 days in soil is respectively 95%, 92%, 93%.The present invention will
Attapulgite clay is introduced into the preparation of sustained-controll-release fertiliser, can not only play a part of sustained release, can also provide a variety of nutrition members
Element.Meanwhile, the slow controlled release layer of fertilizer of the present invention can be slightly soluble in water, be finally reached slow controlled release in the long period of soaking of soil moisture
Effect.Calcium hydroxide becomes calcium carbonate by calcium hydroxide in atmosphere, and with certain intensity, and calcium carbonate is formed in water
Calcium bicarbonate, calcium bicarbonate is slightly soluble in water, gradually can digest among soil.Therefore the slow controlled release layer itself can be hard in atmosphere
Change, adhesive consumption can be significantly reduced；The slow controlled release layer can gradually dissolve in water simultaneously discharges internal layer active principle, delays control
Lump will not finally be formed by releasing layer, and discharge alkalescence material, and improved soil acidifying is hardened, while the calcium constituent of release is plant
Important element required for thing.The invention also with adhesive consumption is reduced, is saved, drop in addition to possessing good slow release effect
Low cost, a variety of auxiliaring effects such as improved soil.
, but those skilled in the art once know basic creation although preferred embodiments of the present invention have been described
Property concept, then can make other change and modification to these embodiments.So, appended claims are intended to be construed to include excellent
Select embodiment and fall into having altered and changing for the scope of the invention.
Obviously, those skilled in the art can carry out the essence of various changes and modification without departing from the present invention to the present invention
God and scope.So, if these modifications and variations of the present invention belong to the scope of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to comprising including these changes and modification.
Claims (4)
1. a kind of preparation method of self-curing film-coated controlled release fertilizer, it is characterised in that including preparing fertilizer kernel and preparing slow
Two processes of controlled release layer；
1) fertilizer kernel is prepared：1.0-2.0mm urea granules are added in granulating disc, spraying into appropriate atomized water makes its table
Face is soaked, then in the case where granulating disc rotates, and addition compares 3 with weight:6:5 well mixed attapulgite clays, urine
Element, potassium dihydrogen phosphate powder, make mix powder be wrapped in urea granules outer layer, obtain fertilizer kernel；
2) slow controlled release layer is prepared：Appropriate atomized water is sprayed into again, then adds alginic acid in the case where granulating disc rotates
Sodium powder end, makes sodium alginate powder be wrapped in fertilizer kernel outer layer, and it is molten for 5% calcium chloride then to spray into concentration to granulated fertilizer
Liquid, then sprays into glue, glue is evenly distributed on the surface of granulated fertilizer, and then, slaked lime powder is sprayed in granulated fertilizer
Surface, continues to rotate untill granulated fertilizer is by uniform coat, finally, the granulated fertilizer being wrapped by is dried and sieved, you can
Self-curing film-coated controlled release fertilizer is made.
2. a kind of preparation method of self-curing film-coated controlled release fertilizer as claimed in claim 1, it is characterised in that the particle
The weight ratio of fertilizer, glue and slaked lime powder three is 70：0.5-0.8：20~25.
3. a kind of preparation method of self-curing film-coated controlled release fertilizer as claimed in claim 1, it is characterised in that the glue
For the marine alga sol solution of concentration 8%.
4. self-curing film-coated controlled release fertilizer prepared by a kind of preparation method as described in claim 1-3 is any.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108101697A (en) * | 2017-12-14 | 2018-06-01 | 湖北富邦科技股份有限公司 | A kind of granulated fertilizer and production method with acid soil opsonic action |
| CN108329111A (en) * | 2018-04-03 | 2018-07-27 | 广东丰康生物科技有限公司 | A kind of high nutrient chemical fertilizer and preparation method thereof of agricultural microbial agent height survival |
| CN108795435A (en) * | 2018-04-23 | 2018-11-13 | 上海工程技术大学 | A kind of preparation method of controllable biodegradable soil conditioner |
| CN110590454A (en) * | 2019-10-09 | 2019-12-20 | 美丽国土（北京）生态环境工程技术研究院有限公司 | Slow/controlled release fertilizer and preparation method thereof |
| CN112279716A (en) * | 2020-10-21 | 2021-01-29 | 彭玲玲 | Environment-friendly compound fertilizer with slow release function and preparation method thereof |
| CN113527005A (en) * | 2021-08-04 | 2021-10-22 | 安徽省司尔特肥业股份有限公司 | Special stable formula fertilizer for corn and preparation method thereof |
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| SU1353767A1 (en) * | 1984-08-15 | 1987-11-23 | Тюменский Сельскохозяйственный Институт | Method of obtaining slow=acting fertilizers |
| CN101891543A (en) * | 2010-07-14 | 2010-11-24 | 兰州大学 | Method for preparing granular compound fertilizer |
| CN102424633A (en) * | 2011-09-14 | 2012-04-25 | 常大勇 | Self-curing film-coated controlled release fertilizer and preparation method thereof |
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2017
- 2017-05-15 CN CN201710338546.1A patent/CN107141065A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1353767A1 (en) * | 1984-08-15 | 1987-11-23 | Тюменский Сельскохозяйственный Институт | Method of obtaining slow=acting fertilizers |
| CN101891543A (en) * | 2010-07-14 | 2010-11-24 | 兰州大学 | Method for preparing granular compound fertilizer |
| CN102424633A (en) * | 2011-09-14 | 2012-04-25 | 常大勇 | Self-curing film-coated controlled release fertilizer and preparation method thereof |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108101697A (en) * | 2017-12-14 | 2018-06-01 | 湖北富邦科技股份有限公司 | A kind of granulated fertilizer and production method with acid soil opsonic action |
| CN108329111A (en) * | 2018-04-03 | 2018-07-27 | 广东丰康生物科技有限公司 | A kind of high nutrient chemical fertilizer and preparation method thereof of agricultural microbial agent height survival |
| CN108795435A (en) * | 2018-04-23 | 2018-11-13 | 上海工程技术大学 | A kind of preparation method of controllable biodegradable soil conditioner |
| CN110590454A (en) * | 2019-10-09 | 2019-12-20 | 美丽国土（北京）生态环境工程技术研究院有限公司 | Slow/controlled release fertilizer and preparation method thereof |
| CN112279716A (en) * | 2020-10-21 | 2021-01-29 | 彭玲玲 | Environment-friendly compound fertilizer with slow release function and preparation method thereof |
| CN113527005A (en) * | 2021-08-04 | 2021-10-22 | 安徽省司尔特肥业股份有限公司 | Special stable formula fertilizer for corn and preparation method thereof |
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Application publication date: 20170908 |