CN105860980A - Slow release oxidant adopting calcium peroxide as matrix and polyethylene as coating film, and preparation method thereof - Google Patents
Slow release oxidant adopting calcium peroxide as matrix and polyethylene as coating film, and preparation method thereof Download PDFInfo
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- CN105860980A CN105860980A CN201610229154.7A CN201610229154A CN105860980A CN 105860980 A CN105860980 A CN 105860980A CN 201610229154 A CN201610229154 A CN 201610229154A CN 105860980 A CN105860980 A CN 105860980A
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- calcium peroxide
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K17/00—Soil-conditioning materials or soil-stabilising materials
- C09K17/40—Soil-conditioning materials or soil-stabilising materials containing mixtures of inorganic and organic compounds
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2101/00—Agricultural use
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2109/00—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE pH regulation
Abstract
The invention discloses a slow release oxidant adopting calcium peroxide as a matrix and polyethylene as a coating film, and a preparation method thereof. The slow release oxidant is prepared from 60% calcium peroxide, a binder, attapulgite, xylene, polyethylene, a penetrant and talcum powder in proportion. The preparation method comprises the following steps: 1, uniformly mixing calcium peroxide, the binder and attapulgite, and granulating the obtained mixture; 2, preparing enough amounts of xylene, PE and JF with the mass of the obtained granulated mixture as a reference, and preparing enough amounts of the talcum powder, JFC and xylene with the use amount of the PE as a reference; and 3, mixing raw materials in step 2, coating granules obtained in the step 1, and drying the coated granules to obtain the slow release oxidant. The preparation method has the advantages of reasonable formula, easy implementation and simple operation; and the slow release oxidant can effectively solve the oxygen release time problem of calcium peroxide in gley rice fields and improve the rice growth environment of the gley rice fields, has incomparable superiority in improvement of acidic gley rice soil in the South, and also has the advantages of wide sources of raw materials, and wide promotion and application prospect.
Description
Technical field
The invention belongs to Agro-ecology, soil improvement regulates and controls field with plant nutrient, and be more particularly to is a kind of with mistake
Calcium oxide be matrix, polyethylene be the slow-release oxygen agent of coating, also relating to one with calper calcium peroxide for matrix polyethylene is
The preparation method of the slow-release oxygen agent of coating, this slow-release oxygen agent can effectively cut down the poisonous reducing substances in gleying rice field, and
Can be paddy rice oxygen supply, moreover it is possible to improve acid gleying paddy soil pH, improve gleying paddy rice growing environment, delaying of preparation
Oxygen release agent is applicable to the improvement in gleying rice field during the Rice Cropping in vast gleying rice district.
Background technology
Gleyic paddysoil is the modal low-yield land of south China, is distributed widely in Plain Lake and hills and rushes ridge, accounts for
The 1/3 of paddy fields in south china area, and the rice field area in recent years threatened by gleying has the trend of substantially expansion.Gleyic paddysoil by
In being in low-lying landform positions, the long-term accumulated water of soil (or backwater), water-cooled mud temperature is low, poisonous, deleterious reduction material accumulation,
Nutrient Transformation is slow, it is suppressed that the growth of rice root and the absorption to soil nutrient thereof, thus seriously restricts rice high yield.As
What efficiently utilizes gleying rice field, is not only related to China's grain-production, is also related to " amphitypy society " and builds, simultaneously to region
Agriculture and socioeconomic sustainable development is significant.
The Crack cause of gleying rice soil, is first that permeability is bad, next to that a large amount of decomposable asymmetric choice net aerobic substance exists,
Being impeded drainage again, cropping system is improper.Gleying rice soil maximum feature is also soil anoxic.Having of gley paddy soil
Although machine matter is accumulated more, but decomposing slowly, mineralization is more weak.Due to anoxic, cause the reducing substances in paddy soil
Accumulation, such as hydrogen sulfide, small molecular organic acid, the divalence Fe and Mn etc. of excess, all has greatly rice root growth and Nutrient Absorption
Adverse effect, its to rice root poison reflection be morphologically radical reduce, root system shortens, and distribution reduces, black root
Number increases.Physiologically it is mainly the normal aerobic respiration of block cell pigment oxidation enzyme system, thus affects the normal merit of root system
Can play.Gleization result make reducing substances and ferrous ion accumulation, partial cation is replaced out, accelerate iron, calcium,
Phosphorus, potassium, the leaching loss of silicon, cause incobation loss of soil nutrient and degeneration.
Paddy rice normal growth needs sufficient oxygen.The eighties in last century, Japanese scholars Shigeru takes the lead in paddy rice oxygen
Demand carries out quantitative study, and determines water planting Rice under Condition different growing oxygen demand: tillering stage be 0.27～
0.79mg/ (g h), the jointing stage is 0.95～0.88mg/ (g h), and boot stage is 0.98～1.07mg/ (g h), heading stage
For 0.93mg/ (g h), full heading time is 0.85mg/ (g h), and the maturity period is 0.68mg/ (g h).The research such as wangdan English is thought
Heading stage is the period that paddy growth oxygen demand is maximum.Soil oxygen concentration is supervised under field condition by Pezeshki etc.
Surveying, result shows, guarantee rice root when oxygen concentration relative atmospheric oxygen content is at least maintained at 3～5% in paddy soil
Normal absorption to oxygen.Therefore, under existing cultivation step, gleying paddy rice easily occurs anoxic to coerce.This is because it is latent
The severe depletion of oxygen of educating rice field, causes the reducing substances in paddy soil such as hydrogen sulfide, small molecular organic acid and the two of excess
The accumulation of valency Fe and Mn etc., causes Root Growth of Rice to be obstructed, and improving activity of root system is poor, root system early ageing, limit root system to N, P,
The absorption of the nutrients such as K；Causing under anoxia condition, paddy rice effective tillering is few, sword-like leave chlorophyll content and SOD activity decrease speed
Hurry up, photosynthesis is obstructed, and dry-matter accumulation reduces, and finally causes grouting insufficient, and setting percentage is relatively low, thus reduces paddy rice product
Amount.
At present, eliminate or alleviate the measure of rice field gleying and mainly build water conservancy projects, drain flooded fields in time, eliminate stain evil；Secondly
It is that the farming Land use systems changing rice field (as used duck-raising enclosed paddy fields, breeding fish, is planted the industrial crops such as water chestnut, or implemented floods and droughts
Crop rotation)；It is the rational application of fertilizer again.But the effect of above-mentioned artificial ameliorative measure is all temporary transient, because causing the gas of rice field gleying
Waiting and geographical environment does not change, therefore, existing technical measures cannot meet the long-term needs of gleying rice field improvement.In a large number
Result of study shows, uses calper calcium peroxide oxidant, can effectively cut down soil reduction process material, improve soil pH, and can also be
Crop supply oxygen, activating soil organic carbon.But calper calcium peroxide oxygen release time in gleying rice field is shorter, it is impossible to meet paddy rice
The fertility middle and later periods demand to oxygen.The present patent application person is for the key factor reduction of restriction Gleyic paddysoil crop yield
Material, the sustained release calper calcium peroxide of Gleyic paddysoil soil reduction process material is effectively cut down in initiative.This technology with calper calcium peroxide as core,
Select suitable binding agent and coating agent, use polyethylene coated slow-release calper calcium peroxide and suitable production technology, it is thus achieved that slow
The oxygen release time of oxygen release agent product, up to more than 100 days, can meet the demand to oxygen in gleying paddy rice time of infertility,
And improve acid gleying paddy soil pH.
Summary of the invention
It is an object of the invention to there are provided a kind of with calper calcium peroxide for the matrix polyethylene slow-release oxygen agent as coating,
Rationally, easy to implement the method, simple to operate, this slow-release oxygen agent includes 60% calper calcium peroxide, binding agent, attapulgite, diformazan to formula
Benzene, PE, JFC, talcum powder, by quantity and the ratio of reasonable disposition raw material, can effectively solve calper calcium peroxide in gleying rice field
Middle oxygen release matter of time, improves gleying paddy rice growing environment, and this slow-release oxygen agent is acid gleying rice soil in south
Improvement aspect there is the unrivaled superiority of common oxidizer, raw material sources are extensive, and popularizing application prospect is wide.
Another object of the present invention be there are provided a kind of with calper calcium peroxide for the matrix polyethylene sustained release as coating
The preparation method of oxidant, simple to operate, easy to implement the method.
In order to realize above-mentioned purpose, the present invention uses techniques below measure:
A kind of with calper calcium peroxide for the matrix polyethylene slow-release oxygen agent as coating, it is by the raw material system of following weight portion
Become:
Described calper calcium peroxide raw material, for a kind of industrial products, is produced by calcium hydroxide method and obtains, its calper calcium peroxide content
About 60%, calcium hydroxide content about 38%, calcium carbonate content about 2%, it is alkalescence that calcium hydroxide is dissolved in water, and being applied to soil can carry
High soil pH, its chemical formula is Ca (OH)2, it accounts for 24～38% of gross mass in inventive formulation；Calcium carbonate is applied to soil
Also can improve soil pH, its chemical formula is CaCO3, it accounts for 1～2% of gross mass in inventive formulation；Calper calcium peroxide is a kind of
Conventional oxidant, is dissolved in water and in alkalescence and slowly releases oxygen, be applied to gleying rice field, can eliminate gleying rice field
Poisonous reducing substances, can grow oxygen supply for gleying paddy rice, and improve acid gleying paddy soil pH, and its chemical formula is
CaO2, it accounts for 39～60% of gross mass in inventive formulation；
Described binding agent raw material (Mingguang City Xing Xin mining industry Co., Ltd), for a kind of industrial products, is the one of starch
Derivative, has stronger viscosity after being dissolved in water, each component bonding in calper calcium peroxide raw material can be got up, make granulation consolidation, and it accounts for
In inventive formulation the 0.1～10% of gross mass.In calper calcium peroxide granulation process, can be without binding agent raw material, granulation
Effect and interpolation are the most suitable；
Described attapulgite raw material, is a kind of clay mineral with attapulgite as key component, crosses 200～300 mesh
Sieve, its preferable chemical molecular formula is: Mg5Si8O20(OH)2(OH2)4·4H2O, containing variable amount of Na in crystal+、Ca2+、Fe3 +、Al3+Plasma, has certain plasticity and cohesive force, is commonly used for fertilizer binding agent, and it accounts for gross mass in inventive formulation
0.1～10%.In calper calcium peroxide granulation process, can be without attapulgite raw material, granulation outcome and the basic phase of interpolation
When；
Described dimethylbenzene, has the liquid of fragranced for water white transparency, be on phenyl ring two hydrogen by methyl substituted product,
Boiling point is 137～140 DEG C, and the position according to two methyl is different, and dimethylbenzene is divided into ortho-xylene, meta-xylene, paraxylene
Three kinds of isomers, dimethylbenzene can arbitrarily mix with ethanol, chloroform or ether, insoluble in water, and dimethylbenzene toxicity is medium, also has one
Determine carcinogenicity, be widely used in organic solvent and synthesis medicine, coating, resin, dyestuff, explosive and agricultural chemicals etc., make as solvent herein
With, its consumption is 1～10% of gross mass in inventive formulation；
Described polyethylene (PE), English name: Polyethylene, is one of five big synthetic resin, is China's synthesis
The kind that in resin, production capacity is maximum, import volume is most.Polyethylene is broadly divided into LLDPE (LLDPE), low-density
Polyethylene (LDPE), high density polyethylene (HDPE) (HDPE) three major types.Wherein, LDPE is milky ball-point pen type particle, nontoxic, tasteless,
Odorless, mattness, density is 0.916～0.930g/cm3, character is relatively soft, has good extensibility, chemically stable
Property, degree of crystallinity (55～65%) is low, and crystalline melt point (108～126 DEG C) is relatively low, and filming performance is preferable, and it accounts for inventive formulation
The 1～10% of middle gross mass；
Described bleeding agent (JFC), belongs to nonionic surfactant, and full name is AEO.Have fixing
Hydrophilic and oleophilic group, can align on the surface of solution, and surface tension can be made to be remarkably decreased, have fabulous adhesive force,
Penetration is extremely strong, fast drying, and wearability is strong, and has good chemical resistance and resistance to water；Being used as bleeding agent, it accounts for this herein
In bright formula the 0.01～0.2% of gross mass；
Described talcum powder raw material, its main component is the magnesium silicate that talcum is aqueous, and molecular formula is Mg3[Si4O10](OH)2,
Cross 800 mesh sieves, there is lubricity, anti-stick, help stream, fire resistance, acid-resisting, insulating properties, fusing point height, chemically torpescence, covering
The excellent Wuli-Shili-Renli system approach such as power is good, softness, good luster, absorption affinity are strong, are used as pore-foaming agent herein, and it accounts for the present invention and joins
In side the 0.01～1% of gross mass.
A kind of with calper calcium peroxide for the matrix polyethylene slow-release oxygen agent as coating, it is made up of the raw material of following weight portion
(preferable scope):
A kind of with calper calcium peroxide for the matrix polyethylene slow-release oxygen agent as coating, it is made up of the raw material of following weight portion
(good scope):
A kind of with calper calcium peroxide for the matrix polyethylene slow-release oxygen agent as coating, it is made up of the raw material of following weight portion
(optimum value):
A kind of with calper calcium peroxide for the preparation method of the matrix polyethylene slow-release oxygen agent as coating, the steps include:
A.60% the former granulation for powders of calper calcium peroxide:
1. seediness: adjusting granulating disc (model: ZL10) disk inclination angle to 58～62 °, rotating speed is adjusted to 30r/
Min, heating apparatus (2KW universal electric furnace, Omron industrial temperature control device E5CZ-R2MT and PT100 thermal resistance assembly) is adjusted to 40
～50 DEG C；Take the former powder of 1kg calper calcium peroxide, be divided into 9～11 equal portions, take portion and put to disk, quickly use water smoke to be moistened
Wet and rise granule, granule particle diameter about 0.4～0.6mm, take out stand-by, repeat abovementioned steps 9～16 times to 9～11 parts powders whole
Seediness is complete.
2. granulation: adjust granulating disc disk inclination angle to 58～62 °, rotating speed is adjusted to 30r/min, and heating apparatus is adjusted
To 40～50 DEG C, open air-introduced machine (model: Y5-47-4C-3KW)；By step 1. in seediness is complete powder all put into circle
Dish comminutor, takes the former powder of 4kg calper calcium peroxide and puts in oscillating feeder (model: GZV1), at the uniform velocity put into powder with 100g/min
Material, adjust water fog spraying gun (model: W-77S) in disk at the highest whereabouts of powder 28～32cm place, to fall reflux material carry out
Spraying, water-spraying amount is adjusted to 16mL/min；Constantly take out calper calcium peroxide particle, sieve, playback, it is desirable to particle size 3～
About 5mm, until the whole granulation of powder is complete.
3. dry: take out the calper calcium peroxide particle having made grain, put to baking oven 104～106 DEG C of temperature greyish white down to outward appearance
(about 3h)；Taking-up is cooled to 50～60 DEG C, seals, and stores in dark.
B. calper calcium peroxide particle envelope:
1. the preparation of end spray fluidized-bed coating machine: open end spray fluidized-bed coating machine (model: DLB-5), preheat end jet flow
Change bed seed-coating machine import air inducing temperature to 98～100 DEG C.
2. the preparation of coating liquid: weigh dimethylbenzene 93.94g, PE 40.84g, JFC 0.68g, talcum powder 0.68g, by two
Toluene, PE, JFC are put into and are heated to 98～100 DEG C of dissolvings in dissolving tank, then are put into by talcum powder, stir, and keep temperature not
Become.
3. coating: weigh the calper calcium peroxide particle 2000.00g having made grain, and put into end spray fluidized-bed coating machine, adjust
Air-introduced machine air quantity is to 2800m3/ h, fluid bed inlet air inducing temperature 98～100 DEG C, particle is preheated 9～11 minutes；Use piston
Oil cylinder (model: CX-LA 40 × 50) extraction step 2. in coating liquid, keep the end spray fluidized-bed coating machine at the bottom of jet flow amount be
5mL/min, end spray pneumatics 0.2MPa, stop-spraying is not spilt, until coating liquid spraying is complete.
4. it is dried: the end spraying fluidized-bed coating machine intake air temperature and is adjusted to 78～82 DEG C, air-introduced machine air quantity is adjusted to 1680m3/
H, is dried 9～11 minutes to coated granule in end spray fluid bed；Close end spray fluidized-bed coating machine warming-up device, keep
Air-introduced machine air quantity is constant, coated granule in fluid bed is cooled to room temperature, and takes out coated granule, standby.
Utilize formula that the present invention provides and the slow-release oxygen agent that preparation method prepares, its oxygen release time up to 100 days with
On.
The present invention compared with prior art, has the following advantages and effect:
A. by consulting literatures and the assay of patent and service condition, specify that calper calcium peroxide is being dived as oxidant
In the use in educating rice field, have that the oxygen release time is too short and the uncontrollable defect of oxygen release speed, therefore have employed film-coating technique, and
Determine selected calper calcium peroxide be matrix polyethylene be the techniqueflow of the slow-release oxygen agent of coating and every technical parameter, for opening
Send out the Multifucntional oxidant with 60% calper calcium peroxide as matrix to lay a good foundation.
Product the most of the present invention passes through reasonable disposition 60% calper calcium peroxide, concave convex rod, bonding agent, dimethylbenzene, PE, JFC, talcum
The quantity of seven kinds of raw materials such as powder and ratio, design the solution culture carried out, after testing, be sustained calper calcium peroxide oxygen according to control experiment
Agent oxygen release concentration in water planting is relatively mild, not only ensure that active oxygen can and slowly discharge, compares calcium peroxide powder
Oxygen release time lengthening more than 1.4 times, but also water body pH can be improved, can effectively solve calper calcium peroxide in gleying rice field
Oxygen release matter of time, thus improve gleying paddy rice growing environment, this slow-release oxygen agent is acid gleying paddy rice in south
The improvement aspect of soil has the unrivaled superiority of common oxidizer.
C. the raw material sources of the present invention are extensive, and processing technology is easy, and method of operating is easy, and popularizing application prospect is wide.
Accompanying drawing explanation
Fig. 1 is a kind of water, calcium peroxide powder, non-coating calper calcium peroxide particle, polyethylene coating calper calcium peroxide leachate
Active o content change schematic diagram.Use stripping quantity method in water that the sustained release performance of coated slow-release oxidant is evaluated, i.e. claim
Take oxidizing agent pellets about 2g, be put in homemade 300 mesh filter cloth bags, filter cloth bag is placed in 250mL ground conical flask, add
250mL distilled water, then conical flask is put in 25 DEG C of constant incubators cultivate, respectively the 1d cultivated, 2d, 3d, 4d,
7d, 10d, 14d, 21d, and later every 7d, until 100d, extract whole leaching liquor, extract after leaching liquor toward in conical flask
Add the distilled water of 250mL, continue to cultivate, extract.Leaching liquor, after fully mixing, standing, measures dissolved in filtrate active oxygen
Content, draw the relation curve of active oxygen gas stripping quantity and water logging time.Often group experiment is repeated 3 times and carries out parallel determination.Sternly
Lattice are measured according to Hash HQ30d portable dissolved oxygen measuring instrument and pH analyzer working specification, it should be noted that active oxygen in water
Content and temperature be negative correlation, temperature is very big on the content impact of active oxygen in water, therefore, cultivates and mensuration is both needed at 25 DEG C
Under conditions of carry out.
Fig. 1 shows, compared with calcium peroxide powder, and polyethylene coating calper calcium peroxide Active oxygen release time lengthening 58
More than it, and oxygen release curve ratio calcium peroxide powder and non-coating calper calcium peroxide particle the mildest.
Fig. 2 is a kind of water, calcium peroxide powder, non-coating calper calcium peroxide particle, polyethylene coating calper calcium peroxide leachate
PH changes schematic diagram.Figure it is seen that polyethylene coating calper calcium peroxide leachate pH change curve than calcium peroxide powder and
Non-coating calper calcium peroxide particle leachate pH change curve is the mildest.
Detailed description of the invention
Embodiment 1:
A kind of with calper calcium peroxide for the matrix polyethylene slow-release oxygen agent as coating, it is by the raw material system of following weight portion
Become:
A kind of with calper calcium peroxide for the preparation method of the matrix polyethylene slow-release oxygen agent as coating, the steps include:
A.60% the former granulation for powders of calper calcium peroxide:
1. seediness: adjusting granulating disc disk inclination angle to 60 °, rotating speed is adjusted to 30r/min, and heating apparatus is adjusted to 40
～50 DEG C；Take the former powder of 1kg calper calcium peroxide, be divided into 10 equal portions, take portion and put to disk, quickly use water smoke to be soaked also
Play granule, granule particle diameter about 0.5mm, take out stand-by, repeat abovementioned steps complete to 10 parts of whole seediness of powder.
2. granulation: adjusting granulating disc disk inclination angle to 60 °, rotating speed is adjusted to 30r/min, and heating apparatus is adjusted to 40
～50 DEG C, open hydrofuge blower unit；1. the powder that seediness is complete in is all put into granulating disc, takes 4kg peroxidating
The former powder of calcium is put in oscillating feeder, at the uniform velocity puts into powder with 100g/min, adjusts water fog spraying gun powder in disk the highest
At whereabouts at 30cm, to falling, backflow material sprays, and water-spraying amount is adjusted to 16mL/min；Constantly take out calper calcium peroxide
Grain, sieves, playback, it is desirable to particle size is at about 4mm, until the whole granulation of powder is complete.
3. dry: take out the calper calcium peroxide particle having made grain, put to baking oven 105 DEG C of temperature greyish white (about down to outward appearance
3h)；Taking-up is cooled to 50～60 DEG C, seals, and stores in dark.
B. calper calcium peroxide particle envelope:
1. the preparation of end spray fluidized-bed coating machine: open end spray fluidized-bed coating machine and air-introduced machine, preheating end spray fluid bed
Seed-coating machine import air inducing temperature is to 100 DEG C.
2. the preparation of coating liquid: weigh dimethylbenzene 93.94g, PE 40.84g, JFC 0.68g, talcum powder 0.68g, by two
Toluene, PE, JFC are put into and are heated to 100 DEG C of dissolvings in dissolving tank, then are put into by talcum powder, stir, keep temperature-resistant.
3. coating: weigh the calper calcium peroxide particle 2000.00g having made grain, and put into end spray fluidized-bed coating machine, adjust
Air-introduced machine air quantity is to 2800m3/ h, fluid bed inlet air inducing temperature 100 DEG C, particle is preheated 10 minutes；Use piston oil-cylinder is taken out
Coating liquid in taking 2., keeping jet flow amount at the bottom of end spray fluidized-bed coating machine is 5mL/min, end spray pneumatics 0.2MPa, and stop-spraying is not spilt,
Until coating liquid spraying is complete.
4. it is dried: the end spraying fluidized-bed coating machine intake air temperature and is adjusted to 80 DEG C, air-introduced machine air quantity is adjusted to 1680m3/ h is right
In end spray fluid bed, coated granule is dried 10 minutes；Close end spray fluidized-bed coating machine warming-up device, keep air-introduced machine
Air quantity is constant, coated granule in fluid bed is cooled to room temperature, and takes out coated granule, standby.
A kind of with calper calcium peroxide for the matrix polyethylene slow-release oxygen agent as coating, it is by the raw material system of following weight portion
Become:
A kind of with calper calcium peroxide for the slow-release oxygen agent granulation as coating of the matrix polyethylene and coating during calper calcium peroxide
Loss assessment:
In this research, the granulation of the calcium peroxide powder of 60% is carried out in a heated state, and has sprayed a certain amount of
Water, the calper calcium peroxide in raw material can be caused certain loss, this is the main loss approach of calper calcium peroxide, meanwhile, coating
Carry out in a heated state, it is also possible to cause the loss of calper calcium peroxide.This research calper calcium peroxide in granulation process only loses
7.9%, after coating, calper calcium peroxide total losses amount is 8.3% (table 1).
The loss amount of calper calcium peroxide in this patent, records when developing sustained release calper calcium peroxide in the lab, if work
Under the conditions of industryization is produced in enormous quantities, the loss of calper calcium peroxide can also reduce further.
Calper calcium peroxide changes of contents after table 1 granulation and coating
Claims (8)
1., with calper calcium peroxide for the matrix polyethylene slow-release oxygen agent as coating, it is made up of the raw material of following weight portion:
Parts by weight of raw materials
60% calper calcium peroxide 63.00 ~ 98.00
Binding agent 0.10 ~ 10.00
Attapulgite 0.10 ~ 10.00
Dimethylbenzene 1.00 ~ 8.00
PE 1.00~8.00
JFC 0.01~0.15
Talcum powder 0.01 ~ 0.80
Described calper calcium peroxide content 60%, calcium hydroxide content 38%, calcium carbonate content 2%, it is alkalescence that calcium hydroxide is dissolved in water, executes
Soil pH can be improved for soil, account for the 24 ~ 38% of gross mass；Calcium carbonate is applied to soil also can improve soil pH, accounts for gross mass
1 ~ 2%；Calper calcium peroxide is a kind of conventional oxidant, is dissolved in water and in alkalescence and discharges oxygen, accounts for the 39 ~ 60% of gross mass；
Described binding agent is a kind of derivative of starch, accounts for the 0.1 ~ 10% of gross mass；
Described attapulgite is a kind of clay mineral, crosses 200 ~ 300 mesh sieves, accounts for the 0.1 ~ 10% of gross mass；
Described dimethylbenzene is the liquid that water white transparency has fragranced, be on phenyl ring two hydrogen by methyl substituted product, boiling point
Being 137～140 DEG C, the position according to two methyl is different, and dimethylbenzene is divided into ortho-xylene, meta-xylene, paraxylene three kinds
Isomers, dimethylbenzene can arbitrarily mix with ethanol, chloroform or ether, and consumption is the 1 ~ 10% of gross mass；
Described polyethylene accounts for the 1 ~ 10% of gross mass；
Described bleeding agent accounts for the 0.01 ~ 0.2% of gross mass；
Described talcum powder composition is the magnesium silicate that talcum is aqueous, crosses 800 mesh sieves, accounts for the 0.01 ~ 1% of gross mass.
It is the most according to claim 1 a kind of with calper calcium peroxide for the matrix polyethylene slow-release oxygen agent as coating, it is characterised in that:
Parts by weight of raw materials
60% calper calcium peroxide 78.00 ~ 96.00
Binding agent 0.20 ~ 5.00
Attapulgite 0.20 ~ 5.00
Dimethylbenzene 2.00 ~ 6.00
PE 2.00~5.00
JFC 0.02~0.10
Talcum powder 0.02 ~ 0.60.
It is the most according to claim 1 a kind of with calper calcium peroxide for the matrix polyethylene slow-release oxygen agent as coating, it is characterised in that:
Parts by weight of raw materials
60% calper calcium peroxide 85.00 ~ 94.00
Binding agent 0.50 ~ 3.00
Attapulgite 0.50 ~ 3.00
Dimethylbenzene 2.50 ~ 5.00
PE 2.50~3.00
JFC 0.03~0.05
Talcum powder 0.05 ~ 0.30.
The most according to claim 1 a kind of with calper calcium peroxide for the matrix polyethylene slow-release oxygen agent as coating, its feature
It is:
Parts by weight of raw materials
60% calper calcium peroxide 93.14
Binding agent 0.10
Attapulgite 0.10
Dimethylbenzene 4.60
PE 2.00
JFC 0.03
Talcum powder 0.03.
The most according to claim 1 a kind of with calper calcium peroxide for the matrix polyethylene slow-release oxygen agent as coating, its feature
It is:
Parts by weight of raw materials
60% calper calcium peroxide 77.83
Binding agent 6.00
Attapulgite 5.00
Dimethylbenzene 7.00
PE 4.00
JFC 0.07
Talcum powder 0.10.
The most according to claim 1 a kind of with calper calcium peroxide for the matrix polyethylene slow-release oxygen agent as coating, its feature
It is:
Parts by weight of raw materials
60% calper calcium peroxide 88.91
Binding agent 1.00
Attapulgite 3.00
Dimethylbenzene 4.00
PE 3.00
JFC 0.04
Talcum powder 0.05.
The most according to claim 1 a kind of with calper calcium peroxide for the matrix polyethylene slow-release oxygen agent as coating, base feature
It is:
Parts by weight of raw materials
60% calper calcium peroxide 93.30
Binding agent 0.30
Attapulgite 0.50
Dimethylbenzene 3.60
PE 2.20
JFC 0.04
Talcum powder 0.06.
8. the preparation method that a kind of described in claim 1 is the matrix polyethylene slow-release oxygen agent as coating with calper calcium peroxide,
The steps include:
A.60% the former granulation for powders of calper calcium peroxide:
1. seediness: adjusting granulating disc disk inclination angle to 58 ~ 62 °, rotating speed is adjusted to 30 r/min, and heating apparatus is adjusted to 40
~50℃；Take the 1 former powder of kg calper calcium peroxide, be divided into 9 ~ 11 equal portions, take portion and put to disk, use water smoke to be soaked and rise
Granule, granule particle diameter 0.4 ~ 0.6 mm, takes out stand-by, repeats abovementioned steps complete to whole seediness to 9 ~ 11 parts of powders；
2. granulation: adjusting granulating disc disk inclination angle to 58 ~ 62 °, rotating speed is adjusted to 30 r/min, and heating apparatus is adjusted to 40
~ 50 DEG C, open air-introduced machine；By step 1. in seediness is complete powder all put into granulating disc, take 4 kg calper calcium peroxides
Former powder is put in oscillating feeder, at the uniform velocity puts into powder with 100 g/min, adjusts water fog spraying gun powder relative superiority or inferiority in disk
Falling at place 28 ~ 32 cm, to falling, backflow material sprays, and water-spraying amount is adjusted to 16 mL/min；Constantly take out calper calcium peroxide
Particle, sieves, and playback, particle size is at 3 ~ 5 mm, until the whole granulation of powder is complete；
3. dry: take out the calper calcium peroxide particle having made grain, put to baking oven 104 ~ 106 DEG C of temperature greyish white down to outward appearance；Take out
It is cooled to 50 ~ 60 DEG C, seals, dark stores；
B. calper calcium peroxide particle envelope:
1. the preparation of end spray fluidized-bed coating machine: open end spray fluidized-bed coating machine, the spray fluidized-bed coating machine import of the preheating end is drawn
Air temperature is to 98 ~ 100 DEG C；
2. the preparation of coating liquid: weigh dimethylbenzene 93.94 g, PE 40.84 g, JFC 0.68 g, talcum powder 0.68 g, will
Dimethylbenzene, PE, JFC are put into and are heated to 98 ~ 100 DEG C of dissolvings in dissolving tank, then are put into by talcum powder, stir, and keep temperature
Constant
3. coating: weighing calper calcium peroxide particle 2000.00 g having made grain, and put into end spray fluidized-bed coating machine, adjustment is drawn
Fan delivery is to 2800 m3/ h, fluid bed inlet air inducing temperature 98 ~ 100 DEG C, particle is preheated 9 ~ 11 minutes；Use piston oil
Cylinder (model: CX-LA 40 × 50) extraction step 2. in coating liquid, keep the end spray fluidized-bed coating machine at the bottom of jet flow amount be 5 mL/
Min, end spray pneumatics 0.2 MPa, stop-spraying is not spilt, until coating liquid spraying is complete；
4. it is dried: the end spraying fluidized-bed coating machine intake air temperature and is adjusted to 78 ~ 82 DEG C, air-introduced machine air quantity is adjusted to 1680 m3/ h is right
In end spray fluid bed, coated granule is dried 9 ~ 11 minutes；Close end spray fluidized-bed coating machine warming-up device, keep air inducing
Fan delivery is constant, coated granule in fluid bed is cooled to room temperature, and takes out coated granule, standby.
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