CN106380310A - Preparation method of biodegradable nitrogen and phosphorus slow-release fertilizer - Google Patents
Preparation method of biodegradable nitrogen and phosphorus slow-release fertilizer Download PDFInfo
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- CN106380310A CN106380310A CN201610781329.5A CN201610781329A CN106380310A CN 106380310 A CN106380310 A CN 106380310A CN 201610781329 A CN201610781329 A CN 201610781329A CN 106380310 A CN106380310 A CN 106380310A
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05B—PHOSPHATIC FERTILISERS
- C05B1/00—Superphosphates, i.e. fertilisers produced by reacting rock or bone phosphates with sulfuric or phosphoric acid in such amounts and concentrations as to yield solid products directly
- C05B1/02—Superphosphates
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- 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
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Abstract
The invention discloses a preparation method of a biodegradable nitrogen and phosphorus slow-release fertilizer and belongs to the field of fertilizer preparation technology. The preparation method comprises the following steps: a) mixing carrageenan, soyabean lecithin, rapeseed oil, a potassium dihydrogen phosphate solution, expanded vermiculite, fish protein powder and sodium stearate, and carrying out ultrasonic dispersion; b) coating a fertilizer master batch A with the mixed liquor, drying and cooling to room temperature so as to prepare fertilizer granules; c) mixing a fertilizer master batch B, expanded corn flour and the fertilizer granules so as to prepare compound fertilizer granules; and d) obtaining beta-cyclodextrin and a potassium nitrate solution, adding the compound fertilizer granules, stirring, drying and cooling to room temperature so as to prepare the biodegradable nitrogen and phosphorus slow-release fertilizer. The method is suitable for preparation of a water-soluble slow-release fertilizer. The coating material is a degradable material and is pollution-free to soil. The technology of the invention is simple and convenient to operate, has short technological cycle, causes no wastes, accords with the ideal of atom economy and environmental protection, and is beneficial to industrial promotion and application.
Description
Technical field
The present invention relates to chemical fertilizer manufacturing technology field, especially relate to a kind of preparation of Biodegradable nitrogen phosphorus slow release chemical fertilizer
Method.
Background technology
Chemical fertilizer occupies very important status in agricultural production.China is as a large agricultural country, right in agricultural production
The demand of chemical fertilizer is very high, and chemical fertilizer has become as maximum material investment in agricultural production according to statistics, accounts for full scale production and props up
50% about going out.The fertilizer production of China and usage amount are the first in the world, and wherein yield accounts for the 20% of world Fertilizer yield,
Usage amount has accounted for the 28% of world Fertilizer consumption；However, the property due to chemical fertilizer and the requirement to soil environment, then lead to
Soil physical properties constantly deteriorates, and so not only affects the raising of crops, and environment be also result in huge pollution；Cause
This, improve chemical fertilizer utilization ratio, reduces fertilising excessive, it is to avoid it is in the urgent need to address that environmental pollution has become as Developing Sustainable Agriculture
Problem.Slow release fertilizer is also known as release and release control fertilizer（control release fertilizers）Just arise at the historic moment.
Slow release chemical fertilizer has following advantage：1）Minimizing nutrient loss, raising chemical fertilizer utilization ratio, 2）Make to cause plant in soil not
Can be reduced with biological fixation effect using the chemistry of form, 3）The nitrogen unit decreasing denitrification and nitrogen Nitrification and causing
Element loss；However, existing slow release chemical fertilizer there are the following problems：1）Integument film forming matter mostly is synthesising macromolecule copolymer, is difficult
Biodegradation；2）Directly add chemical adhesive parcel, slow release cycle is short or slow release using pure starch or various plant straw powder
Speed is difficult to control to；3）Coating matter used expensive such as silane, titanate esters or Aluminate etc. coupling agent, high cost is unfavorable for
Large-scale promotion application.
Content of the invention
For solving the above problems, the invention provides a kind of reliable and stable, low cost, nitrogen and phosphorus content is suitable, material therefor
Biodegradable, do not change the preparation method of the degradable controlled release fertilizer of soil environment.
For achieving the above object, the technology that the present invention adopts is as follows：
A kind of preparation method of Biodegradable nitrogen phosphorus slow release chemical fertilizer, comprises the following steps：
a）In parts by weight, by 200 parts of carrageenans, 120～140 parts of soybean phospholipids, 140～160 portions of Oleum Brassicae campestriss, 20～30 parts
0.2～0.4mol/L potassium dihydrogen phosphate, 20～28 parts of expanded vermiculites, 50～70 parts of fish protein powders and 60～70 parts of stearic acid
After sodium mixing, ultrasonic disperse 50～60 minutes, obtain mixed liquor；
b）Take fertilizer master batch A, the mixed liquor of fertilizer master batch A weight 30～40% is coated uniformly on fertilizer using air-blast atomizing mode
The surface of material master batch A, is cooled to room temperature after being dried 40～50 minutes afterwards, prepared chemical fertilizer granule at 60～70 DEG C；
c）Take the fertilizer mother particle B of 1～1.2 times of chemical fertilizer granule weight and the expanded corn powder of chemical fertilizer granule weight 20～26% and change
Fertiliser granulates mix, stirring mixing 30～40 minutes, prepared composite chemical fertilizer granule at 80～90 DEG C；
d）Take the beta-schardinger dextrin-of composite chemical fertilizer particle weight 20～30% and composite chemical fertilizer particle weight 2～10% 0.1～
Potassium nitrate solution and beta-schardinger dextrin-are first mixed into pasty state, are subsequently adding composite chemical fertilizer by 0.14mol/L potassium nitrate solution
Grain, stirs 80～120 minutes at 30～40 DEG C, after being dried and be cooled to room temperature afterwards, prepared Biodegradable nitrogen phosphorus slow release
Chemical fertilizer.
The slow-release fertilizer of this preparation method preparation is the slow-release fertilizer with 4 Rotating fields, wherein has two slow release layers and two
Chemical fertilizer layer, can make the onset time of this chemical fertilizer more long；Ecto-entad be successively by beta-schardinger dextrin-for primary raw material outermost
Slow release layer, beta-schardinger dextrin-is a kind of good covering material, can form inclusion complex with multiple compounds so as to stablizing, increasing
Molten, slow release, emulsifying, antioxidation, antidecomposition, insulation, protection against the tide, so that chemical fertilizer is storing process at ordinary times and after application will not
Lost efficacy it is ensured that slow-release fertilizer preserves in longer time because of the reason such as water or in the air dioxygen oxidation；Although, β-ring paste
Essence will not be decomposed under water or air or illumination condition, but after the slow-release fertilizer being coated with beta-schardinger dextrin-is applied, soil
In intrinsic microbes gradually decompose the beta-schardinger dextrin-on slow-release fertilizer surface so that chemical fertilizer therein comes out so that
Chemical fertilizer comes into force, and increases the fertility of soil；It is the fertilizer layer being made up of fertilizer mother particle B, fertilizer mother particle B and fertilizer inside beta-schardinger dextrin-
The difference of master batch A is only that its particle diameter is different, and the particle diameter of fertilizer mother particle B is about the 1/10 about of fertilizer master batch A particle diameter, this be for
Fertilizer mother particle B easier can be coated on the outside of fertilizer master batch A, but outermost slow release layer beta-schardinger dextrin-is by soil
Microbial decomposition after, fertilizer mother particle B comes out, and fish protein contained therein is fertile and phosphorus, nitrogenous fertilizer material start onset, is soil
Fertility is provided；Simultaneously, due to have inside fertilizer mother particle B by carrageenan, soybean phospholipid and fish protein powder for raw material be obtained
Second layer slow release layer, now inner side fertilizer master batch A protected by the second slow release layer, do not discharge fertility；When fertilizer mother particle B is released
After discharging fertility and being decomposed, the second slow release layer starts to decompose, and then after the second slow release layer is completely broken down, fertilizer master batch A
Start onset, until finally whole slow-release fertilizer releases fertility.This process can continue several thoughtful some months under normal circumstances.
The mixed liquor that carrageenan, soybean phospholipid, Oleum Brassicae campestriss, expanded vermiculite and fish protein powder are obtained, should used as the raw material of the second slow release layer
Mixture can ensure that the fertilizer master batch A of inner side keeps stable in a longer time, and sodium stearate is then as breast
Agent is so as to remaining the more uniform of four kinds of raw materials mixing, and makes emulsifying mixture it is easier to be coated on the outside of fertilizer master batch A；
Airless spraying technology simultaneously, can promote adhesive ability outside fertilizer master batch A for the mixed liquor；In step c, using popcorn
Fertilizer mother particle B is bonded in the outside of the fertilizer master batch A after modern cladding by powder as binding agent.
Preferably, in step a, during ultrasonic disperse, supersonic frequency is 80～90MHz, temperature is 120～130 DEG C.
Preferably, the water content of the Biodegradable nitrogen phosphorus slow release chemical fertilizer being obtained is 10～12wt%.
Preferably, fertilizer master batch A passes through following steps being obtained：In parts by weight, take 200 parts of calcined bentonites, 40～
50 parts of starch, 70～80 parts of fish protein fertilizer, 46～50 parts of phosphorus source, 50～56 parts of nitrogen sources, 12～16 parts of dicyandiamides, 20～30 parts of carboxylics
Methylcellulose, the solution of potassium carbonate of 60～100 parts of 0.16～0.18mol/L and 16～20 parts of sodium lignin sulfonates, first will form sediment
Powder and solution of potassium carbonate, sodium lignin sulfonate are mixed into pasty state, are subsequently added into carboxymethyl cellulose and dicyandiamide in rotating speed
For stirring 4～6 minutes under 10～20rpm, be subsequently adding that fish protein is fertile, phosphorus source and nitrogen source rotating speed be 20～40rpm stirring 4～
6 minutes, calcined bentonites are added to be that 30～50rpm stirs 8～10 minutes in rotating speed afterwards, last drying and crushing to 60～80
Mesh, prepared fertilizer master batch A.
Mainly with the addition of in order to the calcined bentonites with reference to various raw materials in fertilizer master batch A, this kind of calcined bentonites are by swollen
Profit soil is obtained via after alkali acid treatment and activation processing, and it has stronger absorption property, can be various former by fertilizer master batch A
Material is enriched in less volume；Because the aminoacid in fish protein fertilizer and nitrogen source easily become under Nitrification and be difficult to be inhaled
The nitro nitrogenous fertilizer received, in order to prevent the generation of this kind of reaction, adds appropriate nitrification inhibitor dicyandiamide in the feed；Starch is
Can as a kind of degradable fertilizer can also as npk fertilizer a load so as to can be calcined bentonite end
Attachment, but be unlikely to be adsorbed in the duct within calcined bentonites end；Sodium lignin sulfonate makes various as dispersant
Feed distribution is more uniform, simultaneously works as the effect of each emulsifying raw material；Carboxymethyl cellulose then plays the effect of thickening, makes
Soluble nitrogenous P-K fertilizer is unlikely to quickly to run off.
Preferably, the raw material of fertilizer mother particle B is identical with fertilizer master batch A, the preparation method of fertilizer mother particle B removes last pulverizing
Outer identical with the preparation method of fertilizer master batch A to 140～160 mesh.
Fertilizer mother particle B is only that its particle diameter is different from the difference of fertilizer master batch A, and the particle diameter of fertilizer mother particle B is about fertilizer mother
The 1/10 about of grain A particle diameter, this is in order to fertilizer mother particle B easier can be coated on the outside of fertilizer master batch A.
Preferably, calcined bentonites are obtained by following steps：Bentonite cleaning-drying is pulverized, after then pulverizing
Bentonite soaks 40～60 minutes in the sodium hydroxide solution of 0.5～1mol/L, and taking-up afterwards is cleaned with water, then in pH value
For soaking 20～30 minutes in 5～6 sulfuric acid solution, taking-up after immersion is cleaned with water, then molten in the potassium nitrate of 1～2mol/L
Soak 4～6 hours in liquid, take out after immersion and use water cleaning, drying, calcine 1～2 hour at 600～800 DEG C afterwards, final powder
It is broken to 200～240 mesh, prepared calcined bentonites.
Bentonite is first pulverized, after soak in alkaline solution, some are non-to remove on bentonite protein that may be present etc.
Mineral are organized, and then soak in acid solution, go the removal of impurity further, carry out afterwards soaking activation swelling in potassium nitrate solution
The absorbability of soil particle, makes epicarpium Castaneae make when powder is added in fertilizer master batch raw material and can adsorb more Nitrogen-and Phosphorus-containing potassium units
Bentonite after processing finally is calcined and is fully excited its absorption property by the fertilizer of element and various effective additive at high temperature.
Preferably, phosphorus source is calcium superphosphate, nitrogen source is ammonium nitrate.
Therefore, the invention has the advantages that：
（1）Compared with manufacturing slow-release fertilizer casing with existing use amylan with powder timber residue, the present invention can make up because of powder
Shape wood residue granule and space is excessive chemical fertilizer is wrapped up uneven, slow-release time is short and uppity deficiency；
（2）This method is applicable to the preparation of various water-soluble slow-releasing chemical fertilizer, and the material of clad used be can be completely raw
Thing degradable material, pollution-free to soil, do not change soil environment；
（3）Coating used is all biodegradable, with existing using various synthesis macromolecular adhesive do parcel glued membrane compared with, can
Make up the deficiency that synthesis macromolecule is not biodegradable, to soil and environmental pollution；
（4）The process is simple of the present invention, easy to operate, technological cycle is short, and energy consumption is low, and does not produce garbage, meets former
The theory of subeconomy environmental protection, beneficial to industrial application.
Specific embodiment
With reference to specific embodiment, technical scheme is further described.
Obviously, described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.Based on this
Embodiment in invention, all other reality that those of ordinary skill in the art are obtained under the premise of not making creative work
Apply example, broadly fall into the scope of protection of the invention.
Embodiment 1
A kind of preparation method of Biodegradable nitrogen phosphorus slow release chemical fertilizer, comprises the following steps：
a）In parts by weight, by 200 parts of carrageenans, 120 parts of soybean phospholipids, 140 parts of Oleum Brassicae campestriss, 20 parts of 0.2mol/L biphosphates
After potassium solution, 20 parts of expanded vermiculites, 50 parts of fish protein powders and 60 parts of sodium stearate mixing, ultrasonic disperse 50 minutes, mixed
Liquid；During ultrasonic disperse, supersonic frequency is 80MHz, and temperature is 120 DEG C；
b）Take fertilizer master batch A, the mixed liquor of fertilizer master batch A weight 30% is coated uniformly on fertilizer using air-blast atomizing mode female
The surface of grain A, is cooled to room temperature after being dried 40 minutes afterwards, prepared chemical fertilizer granule at 60 DEG C；
c）The fertilizer mother particle B of 1 times of chemical fertilizer granule weight and the expanded corn powder of chemical fertilizer granule weight 20% is taken to mix with changing fertiliser granulates
Close, stirring mixing 30 minutes, prepared composite chemical fertilizer granule at 80 DEG C；
d）Take the 0.1mol/L potassium nitrate of the beta-schardinger dextrin-of composite chemical fertilizer particle weight 20% and composite chemical fertilizer particle weight 2% molten
Potassium nitrate solution and beta-schardinger dextrin-are first mixed into pasty state by liquid, are subsequently adding composite chemical fertilizer granule, stir 80 at 30 DEG C
Minute, after being dried and be cooled to room temperature afterwards, prepared Biodegradable nitrogen phosphorus slow release chemical fertilizer；Prepared Biodegradable nitrogen phosphorus delays
The water content releasing chemical fertilizer is 10wt%；
Wherein, fertilizer master batch A is obtained by following steps：In parts by weight, take 200 parts of calcined bentonites, 40 parts of starch, 70
Part fish protein is fertile, 46 parts of calcium superphosphate, 50 parts of ammonium nitrates, 12 parts of dicyandiamides, 20 parts of carboxymethyl celluloses, 60 parts of 0.16mol/L
Solution of potassium carbonate and 16 parts of sodium lignin sulfonates, first starch and solution of potassium carbonate, sodium lignin sulfonate are mixed into paste
Shape, is subsequently added into carboxymethyl cellulose and dicyandiamide and stirs 4 minutes under rotating speed is for 10rpm, is subsequently adding fish protein fertilizer, crosses phosphorus
Sour calcium and ammonium nitrate stir 4 minutes for 20rpm in rotating speed, add calcined bentonites to stir 8 minutes for 30rpm in rotating speed afterwards,
Last drying and crushing is to 60 mesh, prepared fertilizer master batch A；The raw material of fertilizer mother particle B is identical with fertilizer master batch A, the system of fertilizer mother particle B
Preparation Method is identical with the preparation method of fertilizer master batch A in addition to being finally crushed to 140 mesh；
Calcined bentonites are obtained by following steps：Bentonite cleaning-drying is pulverized, then the bentonite after pulverizing exists
In the sodium hydroxide solution of 0.5mol/L soak 40 minutes, taking-up afterwards is cleaned with water, then pH value be 5 sulfuric acid solution in
Soak 20 minutes, taking-up after immersion is cleaned with water, then soak 4 hours in the potassium nitrate solution of 1mol/L, take out after immersion
Use water cleaning, drying, calcine 1 hour at 600 DEG C afterwards, be finally crushed to 200 mesh, prepared calcined bentonites.
Embodiment 2
A kind of preparation method of Biodegradable nitrogen phosphorus slow release chemical fertilizer, comprises the following steps：
a）In parts by weight, by 200 parts of carrageenans, 130 parts of soybean phospholipids, 150 parts of Oleum Brassicae campestriss, 25 parts of 0.3mol/L biphosphates
After potassium solution, 24 parts of expanded vermiculites, 60 parts of fish protein powders and 65 parts of sodium stearate mixing, ultrasonic disperse 55 minutes, mixed
Liquid；During ultrasonic disperse, supersonic frequency is 85MHz, and temperature is 125 DEG C；
b）Take fertilizer master batch A, the mixed liquor of fertilizer master batch A weight 35% is coated uniformly on fertilizer using air-blast atomizing mode female
The surface of grain A, is cooled to room temperature after being dried 45 minutes afterwards, prepared chemical fertilizer granule at 65 DEG C；
c）Take the fertilizer mother particle B of 1.1 times of chemical fertilizer granule weight and the expanded corn powder of chemical fertilizer granule weight 23% and change fertiliser granulates
Mixing, stirring mixing 35 minutes, prepared composite chemical fertilizer granule at 85 DEG C；
d）Take the 0.12mol/L potassium nitrate of the beta-schardinger dextrin-of composite chemical fertilizer particle weight 25% and composite chemical fertilizer particle weight 6% molten
Potassium nitrate solution and beta-schardinger dextrin-are first mixed into pasty state by liquid, are subsequently adding composite chemical fertilizer granule, stir at 35 DEG C
100 minutes, after being dried and be cooled to room temperature afterwards, prepared Biodegradable nitrogen phosphorus slow release chemical fertilizer；Prepared Biodegradable nitrogen
The water content of phosphorus slow release chemical fertilizer is 11wt%；
Wherein, fertilizer master batch A is obtained by following steps：In parts by weight, take 200 parts of calcined bentonites, 45 parts of starch, 75
Part fish protein is fertile, 48 parts of calcium superphosphate, 53 parts of ammonium nitrates, 14 parts of dicyandiamides, 25 parts of carboxymethyl celluloses, 80 parts of 0.17mol/L
Solution of potassium carbonate and 18 parts of sodium lignin sulfonates, first starch and solution of potassium carbonate, sodium lignin sulfonate are mixed into paste
Shape, is subsequently added into carboxymethyl cellulose and dicyandiamide and stirs 5 minutes under rotating speed is for 15rpm, is subsequently adding fish protein fertilizer, crosses phosphorus
Sour calcium and ammonium nitrate stir 5 minutes for 30rpm in rotating speed, add calcined bentonites to stir 9 minutes for 40rpm in rotating speed afterwards,
Last drying and crushing is to 70 mesh, prepared fertilizer master batch A；The raw material of fertilizer mother particle B is identical with fertilizer master batch A, the system of fertilizer mother particle B
Preparation Method is identical with the preparation method of fertilizer master batch A in addition to being finally crushed to 150 mesh；
Calcined bentonites are obtained by following steps：Bentonite cleaning-drying is pulverized, then the bentonite after pulverizing exists
Soak 50 minutes in the sodium hydroxide solution of 0.7mol/L, taking-up afterwards is cleaned with water, the sulfuric acid solution being then 5.5 in pH value
Middle immersion 25 minutes, taking-up after immersion is cleaned with water, then soaks 5 hours in the potassium nitrate solution of 1.5mol/L, after immersion
Take out and use water cleaning, drying, calcine 1.5 hours at 700 DEG C afterwards, be finally crushed to 220 mesh, prepared calcined bentonites.
Embodiment 3
A kind of preparation method of Biodegradable nitrogen phosphorus slow release chemical fertilizer, comprises the following steps：
a）In parts by weight, by 200 parts of carrageenans, 140 parts of soybean phospholipids, 160 parts of Oleum Brassicae campestriss, 30 parts of 0.4mol/L biphosphates
After potassium solution, 28 parts of expanded vermiculites, 70 parts of fish protein powders and 70 parts of sodium stearate mixing, ultrasonic disperse 60 minutes, mixed
Liquid；During ultrasonic disperse, supersonic frequency is 90MHz, and temperature is 130 DEG C；
b）Take fertilizer master batch A, the mixed liquor of fertilizer master batch A weight 30～40% is coated uniformly on fertilizer using air-blast atomizing mode
The surface of material master batch A, is cooled to room temperature after being dried 50 minutes afterwards, prepared chemical fertilizer granule at 70 DEG C；
c）Take the fertilizer mother particle B of 1.2 times of chemical fertilizer granule weight and the expanded corn powder of chemical fertilizer granule weight 26% and change fertiliser granulates
Mixing, stirring mixing 40 minutes, prepared composite chemical fertilizer granule at 90 DEG C；
d）Take the 0.14mol/L potassium nitrate of the beta-schardinger dextrin-of composite chemical fertilizer particle weight 30% and composite chemical fertilizer particle weight 10% molten
Potassium nitrate solution and beta-schardinger dextrin-are first mixed into pasty state by liquid, are subsequently adding composite chemical fertilizer granule, stir at 40 DEG C
120 minutes, after being dried and be cooled to room temperature afterwards, prepared Biodegradable nitrogen phosphorus slow release chemical fertilizer；Prepared Biodegradable nitrogen
The water content of phosphorus slow release chemical fertilizer is 12wt%；
Wherein, fertilizer master batch A is obtained by following steps：In parts by weight, take 200 parts of calcined bentonites, 50 parts of starch, 80
Part fish protein is fertile, 50 parts of calcium superphosphate, 56 parts of ammonium nitrates, 16 parts of dicyandiamides, 30 parts of carboxymethyl celluloses, 100 parts of 0.18mol/L
Solution of potassium carbonate and 20 parts of sodium lignin sulfonates, first starch and solution of potassium carbonate, sodium lignin sulfonate are mixed into paste
Shape, is subsequently added into carboxymethyl cellulose and dicyandiamide and stirs 6 minutes under rotating speed is for 20rpm, is subsequently adding fish protein fertilizer, crosses phosphorus
Sour calcium and ammonium nitrate stir 6 minutes for 40rpm in rotating speed, add calcined bentonites to stir 10 minutes for 50rpm in rotating speed afterwards,
Last drying and crushing is to 80 mesh, prepared fertilizer master batch A；The raw material of fertilizer mother particle B is identical with fertilizer master batch A, the system of fertilizer mother particle B
Preparation Method is identical with the preparation method of fertilizer master batch A in addition to being finally crushed to 160 mesh；
Calcined bentonites are obtained by following steps：Bentonite cleaning-drying is pulverized, then by the bentonite after pulverizing in 1mol/
In the sodium hydroxide solution of L soak 60 minutes, taking-up afterwards clean with water, then pH value be 6 sulfuric acid solution in immersion 30
Minute, taking-up after immersion is cleaned with water, then soaks 6 hours in the potassium nitrate solution of 2mol/L, after immersion, taking-up is clear with water
Wash drying, calcine 2 hours at 800 DEG C afterwards, be finally crushed to 240 mesh, prepared calcined bentonites.
It should be appreciated that to those skilled in the art, can be improved according to the above description or be become
Change, and all these modifications and variations all should belong to the protection domain of claims of the present invention.
Claims (7)
1. a kind of preparation method of Biodegradable nitrogen phosphorus slow release chemical fertilizer is it is characterised in that comprise the following steps：
a）In parts by weight, by 200 parts of carrageenans, 120～140 parts of soybean phospholipids, 140～160 portions of Oleum Brassicae campestriss, 20～30 parts
0.2～0.4mol/L potassium dihydrogen phosphate, 20～28 parts of expanded vermiculites, 50～70 parts of fish protein powders and 60～70 parts of stearic acid
After sodium mixing, ultrasonic disperse 50～60 minutes, obtain mixed liquor；
b）Take fertilizer master batch A, the mixed liquor of fertilizer master batch A weight 30～40% is coated uniformly on fertilizer using air-blast atomizing mode
The surface of material master batch A, is cooled to room temperature after being dried 40～50 minutes afterwards, prepared chemical fertilizer granule at 60～70 DEG C；
c）Take the fertilizer mother particle B of 1～1.2 times of chemical fertilizer granule weight and the expanded corn powder of chemical fertilizer granule weight 20～26% and change
Fertiliser granulates mix, stirring mixing 30～40 minutes, prepared composite chemical fertilizer granule at 80～90 DEG C；
d）Take the beta-schardinger dextrin-of composite chemical fertilizer particle weight 20～30% and composite chemical fertilizer particle weight 2～10% 0.1～
Potassium nitrate solution and beta-schardinger dextrin-are first mixed into pasty state, are subsequently adding composite chemical fertilizer by 0.14mol/L potassium nitrate solution
Grain, stirs 80～120 minutes at 30～40 DEG C, after being dried and be cooled to room temperature afterwards, prepared Biodegradable nitrogen phosphorus slow release
Chemical fertilizer.
2. a kind of Biodegradable nitrogen phosphorus slow release chemical fertilizer according to claim 1 preparation method it is characterised in that：Described
In step a, during ultrasonic disperse, supersonic frequency is 80～90MHz, and temperature is 120～130 DEG C.
3. a kind of Biodegradable nitrogen phosphorus slow release chemical fertilizer according to claim 1 preparation method it is characterised in that：Described
The water content of prepared Biodegradable nitrogen phosphorus slow release chemical fertilizer is 10～12wt%.
4. a kind of preparation method of Biodegradable nitrogen phosphorus slow release chemical fertilizer according to claim 1 is it is characterised in that described
Fertilizer master batch A passes through following steps and is obtained：In parts by weight, take 200 parts of calcined bentonites, 40～50 parts of starch, 70～80 parts
Fish protein is fertile, 46～50 parts of phosphorus source, 50～56 parts of nitrogen sources, 12～16 parts of dicyandiamides, 20～30 parts of carboxymethyl celluloses, 60～
The solution of potassium carbonate of 100 parts of 0.16～0.18mol/L and 16～20 parts of sodium lignin sulfonates, first by starch and solution of potassium carbonate,
Sodium lignin sulfonate is mixed into pasty state, and being subsequently added into carboxymethyl cellulose and dicyandiamide in rotating speed is to stir under 10～20rpm
Mix 4～6 minutes, being subsequently adding fish protein fertilizer, phosphorus source and nitrogen source in rotating speed is that 20～40rpm stirs 4～6 minutes, adds afterwards
Calcined bentonites are that 30～50rpm stirs 8～10 minutes in rotating speed, last drying and crushing to 60～80 mesh, prepared fertilizer master batch
A.
5. a kind of Biodegradable nitrogen phosphorus slow release chemical fertilizer according to claim 1 or 4 preparation method it is characterised in that：
The raw material of described fertilizer mother particle B is identical with fertilizer master batch A, and the preparation method of fertilizer mother particle B is removed and is finally crushed to 140～160 mesh
Outer identical with the preparation method of fertilizer master batch A.
6. a kind of preparation method of Biodegradable nitrogen phosphorus slow release chemical fertilizer according to claim 4 is it is characterised in that described
Calcined bentonites be obtained by following steps：Bentonite cleaning-drying is pulverized, then by the bentonite after pulverizing 0.5～
Soak 40～60 minutes in the sodium hydroxide solution of 1mol/L, taking-up afterwards is cleaned with water, the sulphuric acid being then 5～6 in pH value
Soak 20～30 minutes in solution, taking-up after immersion is cleaned with water, in the potassium nitrate solution of 1～2mol/L, then soak 4～6
Hour, take out after immersion and use water cleaning, drying, calcine 1～2 hour at 600～800 DEG C afterwards, be finally crushed to 200～240
Mesh, prepared calcined bentonites.
7. a kind of Biodegradable nitrogen phosphorus slow release chemical fertilizer according to claim 4 preparation method it is characterised in that：Described
Phosphorus source is calcium superphosphate, and nitrogen source is ammonium nitrate.
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| CN106916023A (en) * | 2017-04-19 | 2017-07-04 | 深圳市升阳升清洁服务有限公司 | A kind of method that utilization biologic garbage makes fertilizer |
| CN107500935A (en) * | 2017-10-12 | 2017-12-22 | 郑州大学 | A kind of product for directly being produced the method for compound fertilizer by white fertilizer and being produced by this method |
| CN107963923A (en) * | 2017-11-13 | 2018-04-27 | 常州杰轩纺织科技有限公司 | A kind of preparation method of slow-release anti-caking granulated fertilizer |
| CN109181480A (en) * | 2018-08-30 | 2019-01-11 | 浙江海洋大学 | A kind of epoxy zinc-enriched paint comprising modifying titanium dioxide and preparation method and purposes |
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| CN104447029A (en) * | 2014-12-14 | 2015-03-25 | 青岛锐志农业技术服务有限公司 | Plant environment-friendly slow-release compound fertilizer |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104447029A (en) * | 2014-12-14 | 2015-03-25 | 青岛锐志农业技术服务有限公司 | Plant environment-friendly slow-release compound fertilizer |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106916023A (en) * | 2017-04-19 | 2017-07-04 | 深圳市升阳升清洁服务有限公司 | A kind of method that utilization biologic garbage makes fertilizer |
| CN107500935A (en) * | 2017-10-12 | 2017-12-22 | 郑州大学 | A kind of product for directly being produced the method for compound fertilizer by white fertilizer and being produced by this method |
| CN107963923A (en) * | 2017-11-13 | 2018-04-27 | 常州杰轩纺织科技有限公司 | A kind of preparation method of slow-release anti-caking granulated fertilizer |
| CN109181480A (en) * | 2018-08-30 | 2019-01-11 | 浙江海洋大学 | A kind of epoxy zinc-enriched paint comprising modifying titanium dioxide and preparation method and purposes |
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