CN109232090A - A kind of environmentally friendly flyash film-coated and slow release fertilizer and preparation method - Google Patents
A kind of environmentally friendly flyash film-coated and slow release fertilizer and preparation method Download PDFInfo
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- CN109232090A CN109232090A CN201811254230.5A CN201811254230A CN109232090A CN 109232090 A CN109232090 A CN 109232090A CN 201811254230 A CN201811254230 A CN 201811254230A CN 109232090 A CN109232090 A CN 109232090A
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- CN
- China
- Prior art keywords
- flyash
- environmentally friendly
- fertilizer
- coated
- sodium metasilicate
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Classifications
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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
- C05G1/00—Mixtures of fertilisers belonging individually to different subclasses of C05
-
- 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
- C05G5/00—Fertilisers characterised by their form
- C05G5/30—Layered or coated, e.g. dust-preventing coatings
- C05G5/36—Layered or coated, e.g. dust-preventing coatings layered or coated with sulfur
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- Life Sciences & Earth Sciences (AREA)
- Pest Control & Pesticides (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Fertilizers (AREA)
Abstract
The invention discloses a kind of environmentally friendly flyash film-coated and slow release fertilizer and preparation methods, by the above-mentioned means, the present invention can slow down water-soluble chemical fertilizer rate of release in coating, increase the fertilizer efficiency duration.It is characterized in that, being to be prepared from the following raw materials: flyash, sodium hydroxide, EDTA-Ca, EDTA-Na, aluminum sulfate, sodium metasilicate；The present invention obtains environmentally friendly flyash for flyash modified, then the product obtained after aluminum sulfate and sodium metasilicate Hybrid Heating is added in modified coal ash and is bonded, and is then sprayed on fertilizer again, the chemical fertilizer with slow release effect is made.Outstanding feature of the present invention be using modification detoxification flyash porosity it is big, water-soluble chemical fertilizer rate of release in coating can be slowed down, make the fertilizer efficiency duration increase.
Description
Technical field
The present invention relates to slow-release fertilizer preparation field, more particularly to a kind of environmentally friendly flyash film-coated and slow release fertilizer and its
Production method.
Background technique
Flyash is one of a kind of solid waste that steam power plant generates, and in recent years, the rapid development of power industry is brought
Flyash discharge capacity sharply increases, and the flyash total amount that Hazards in Power Plant is discharged every year increases by 2000 about 1.5 year by year
Hundred million tons, reaches 300,000,000 tons within 2010, if flyash, which is dealt with improperly, will will cause dust pollution atmosphere, be discharged into water and will lead to river
Road siltation blocking, the development of the national economy and ecological environment to China cause huge pressure
Slow release fertilizer is also known as slow-release fertilizer or this kind of fertilizer of release and release control fertilizer can be by the release of nutrient needed for plant in the soil
Speed is slow or the available a degree of control of nutrient releasing speed is for the utilization of crop constant absorption, and improving chemical fertilizer has
Imitate the utilization efficiency of ingredient.Coated fertilizer is wrapped on chemical fertilizer granule surface using water-soluble chemical fertilizer as core, utilizes this by it
The special nature of layer material reaches the rate for slowing down fertilizer release, what the regulation of fertilizer requirement of the release and crop that make its nutrient was mutually coordinated
New-type fertilizer, the development of this kind of fertilizer are to improve utilization rate of fertilizer, mitigate environmental pollution, develop the modern agriculture to save labor and mention
New thinking is gone out.Therefore, the researcher of the subjects such as fertilizer science, agrology, environmental science, chemistry sets foot in the field one after another,
And achieve large quantities of valuable research achievements.Currently, the slow/controlled release material applied and just studied can be divided into inorganic (mine)
Object powder, organic high molecular polymer, environmentally friendly material (organic-inorganic composite body) three categories
There is scholar to show in general after long-term field experiment, after nitrogenous fertilizer applies people's soil, only
30-50% can be absorbed by crops utilization, and rest part then lost in vain " causes loss of nitrogen fertilizer, be waving due to ammonia
It " develops caused by hair, leaching loss, nitrification and denitrification effect and application slow-release nitrogen fertilizer makes exactly for the solution rate for reducing nitrogenous fertilizer
Nitrogenous fertilizer provides nitrogen successively in slow course of dissolution for crop, injures Crop Species because local concentration is excessively high when preventing from largely applying
The adverse consequences such as son, seedling or leaf of burning, to achieve the purpose that improve utilization rate of nitrogen fertilizer.
Summary of the invention
Use flyash as coated fertilizer the invention mainly solves the technical problem of providing a kind of, it is environmentally friendly
Film-coated and slow release fertilizer, and preparation method thereof.Heavy metal element in flyash is able to solve to the harm of environment and sustained release effect is made
Fruit is good, environmental-friendly, and formation efficiency is high, can be used for the coating of a variety of fertilizer.
In order to solve the above technical problems, one technical scheme adopted by the invention is that:
(1) by the filtered out partial size of combined sub-sieve in 61-90mm flyash, 10 times of its matter of addition in beaker are fitted into
The deionized water of amount settles 4 hours using after magnetic agitation, the metal of the precipitation of upper layer floating is skimmed, mistake after repeated flushing
Filter, by gained flyash, normal pressure is dried at 120 DEG C
(2) 10g analysis pure cerium hydroxide sodium is weighed using assay balance, is using 100ml volumetric flask configuration quality score
10% sodium hydroxide
(3) it weighs 10g to be placed in a beaker by pretreated flyash, sodium hydroxide solution in (2) is added, magnetic is added
Rotor, 1000rad/min stirring is preheated to 40 DEG C on magnetic stirrer
(4) solution that preheating finishes in (3) is put into use for laboratory microwave synthesizer, setting temperature is 60 DEG C, power
For 600W, time 20min, moderate-speed mixer, repeated flushing after filtering out flyash after solution restores to room temperature, 120 DEG C
Drying
(5) flyash of drying is weighed, weighs sodium metasilicate than the ratio that sodium metasilicate is 8: 1 in flyash, then press silicic acid
Sodium weighs aluminum sulfate than the ratio that aluminum sulfate is 1: 1.2, appropriate amount of deionized water is added in three after mixing, heating makes moisture
Evaporation, stops heating when flyash multiplies paste immediately
(6) paste flyash paste is wrapped on water-soluble chemical fertilizer particle when temperature is slightly lower (prevents chemical fertilizer temperature mistake
High de-agglomeration), will be by the molding chemical fertilizer granule of coating as in constant temperature drying box, 30 DEG C of temperature of setting, air pressure 0.08MPa vacuum are low
Temperature drying forms anti-water-soluble chemical fertilizer to flyash shell in 4 hours.
Specific embodiment
Embodiment one
(1) 10g flyash is put into combination sub-sieve, left and right horizontal shakes sub-sieve, filters out partial size in the area 61-90mm
Between flyash, bottling is put into drying box and dry 2 hours at 120 DEG C, take out encapsulate it is spare；
(2) 10g sodium hydroxide is weighed, the sodium hydroxide solution that then configuration quality score is 10%, the powder that will be filtered out
It is stirred sufficiently after the NaOH solution mixing that coal ash and mass fraction are 10%, is then placed in magnet rotor and is previously heated to 40
℃；
(3) preheat after mixed system is put into use for laboratory microwave synthetic instrument, setting temperature be 60 DEG C,
600W, setting heating time are 15min；
(4) flyash is filtered out and dried using vacuum filtration machine after being modified, is then put into EDTA-Ca solution
It is heated to 30 DEG C while stirring 20min, wait being diluted with water 20 times after reaction then filtration washing, suction filtration, drying are changed
Flyash after property；
(5) by aluminum sulfate and sodium metasilicate, 1: 3 ratio Hybrid Heating is reacted in molar ratio, obtains adhesive, by modified fine coal
Ash is that 5: 1 ratios mix with adhesive in mass ratio, takes advantage of warm (preventing chemical fertilizer from decomposing) and is attached on water-soluble chemical fertilizer；
(6) 30 DEG C of temperature, air pressure 0.08MPa vacuum is arranged as in constant temperature drying box in the molding chemical fertilizer granule of coating
Obtain product within low temperature drying 4 hours.
Embodiment two
(1) 10g flyash is put into combination sub-sieve, left and right horizontal shakes sub-sieve, filters out partial size in the area 61-90mm
Between flyash, bottling is put into drying box and dry 2 hours at 120 DEG C, take out encapsulate it is spare；
(2) 10g sodium hydroxide is weighed, the sodium hydroxide solution that then configuration quality score is 10%, the powder that will be filtered out
It is stirred sufficiently after the NaOH solution mixing that coal ash and mass fraction are 10%, is then placed in magnet rotor and is previously heated to 40
℃；
(3) preheat after mixed system is put into use for laboratory microwave synthetic instrument, setting temperature be 70 DEG C,
600W, setting heating time are 10min；
(4) flyash is filtered out and dried using vacuum filtration machine after being modified, is then put into EDTA-Na solution
It is heated to 30 DEG C while stirring 20min, wait after reaction plus deionized water dilutes 20 times of then filtration washing, suction filtration, drying
Obtain modified flyash；
(5) by aluminum sulfate and sodium metasilicate, 1: 1 ratio Hybrid Heating is reacted in molar ratio, obtains adhesive, by modified fine coal
Ash is that 8: 1 ratios mix with adhesive in mass ratio, takes advantage of warm (preventing chemical fertilizer from decomposing) and is attached on water-soluble chemical fertilizer；
(6) 35 DEG C of temperature, air pressure 0.08MPa vacuum is arranged as in constant temperature drying box in the molding chemical fertilizer granule of coating
Obtain product within low temperature drying 3.5 hours.
Embodiment three
(1) 10g flyash is put into combination sub-sieve, left and right horizontal shakes sub-sieve, filters out partial size in the area 61-90mm
Between flyash, bottling is put into drying box and dry 2 hours at 120 DEG C, take out encapsulate it is spare；
(2) 10g sodium hydroxide is weighed, the sodium hydroxide solution that then configuration quality score is 10%, the powder that will be filtered out
It is stirred sufficiently after the NaOH solution mixing that coal ash and mass fraction are 10%, is then placed in magnet rotor and is previously heated to 40
℃；
(3) preheat after mixed system is put into use for laboratory microwave synthetic instrument, setting temperature be 60 DEG C,
700W, setting heating time are 15min；
(4) flyash is filtered out and is dried using vacuum filtration machine after modified, then put into EDTA-Na with
EDTA-Ca mixed solution is heated to 50 DEG C while stirring 40min, waits after reaction plus deionized water dilutes 20 times and then filters
Washing, suction filtration, drying obtain modified flyash；
(5) by aluminum sulfate and sodium metasilicate, 1: 1 ratio Hybrid Heating is reacted in molar ratio, obtains adhesive, by modified fine coal
Ash is that 10: 1 ratios mix with adhesive in mass ratio, takes advantage of warm (preventing chemical fertilizer from decomposing) and is attached on water-soluble chemical fertilizer；
(6) 35 DEG C of temperature, air pressure 0.08MPa vacuum is arranged as in constant temperature drying box in the molding chemical fertilizer granule of coating
Obtain product within low temperature drying 3.5 hours.
Example IV
(1) the marked quality of this product is the net quality of institute's packet chemical fertilizer in flyash coating, and this product institute packet chemical fertilizer index is
N:46%；
(2) it is calculated with the pure N=12kg of one mu of rice application, it is required to use chemical fertilizer, that is, 26.09kg, consider to damage in manufacturing process
It loses i.e. 28 bags of 1g of application and fills this product；,
(3) this product is sprinkled into rice field when using, to account for 65% among rice field, surrounding accounts for 35% to be advisable amount of application, application
Period is advisable with two two weeks prevents burn seedlings.
Claims (5)
1. a kind of environmentally friendly flyash film-coated and slow release fertilizer, it is characterised in that be made of following raw material:
Flyash, NaOH, EDTA-Ca, aluminum sulfate, sodium metasilicate.
2. a kind of preparation method of environmentally friendly flyash film-coated and slow release fertilizer according to claim 1, which is characterized in that
It is made of following steps:
(1) it by the filtered out partial size of combined sub-sieve in 61-90mm flyash, is fitted into beaker and 10 times of its quality is added
0.3moL/LEDTA-Ca solution settles 4 hours using after magnetic agitation, and the metal of the precipitation of upper layer floating is skimmed, is rushed repeatedly
It is filtered after washing, by gained flyash, normal pressure is dried at 120 DEG C；
(2) 10g analysis pure cerium hydroxide sodium is weighed using assay balance, the use of 100ml volumetric flask configuration quality score is 10%
Sodium hydroxide；
(3) it weighs 10g to be placed in a beaker by pretreated flyash, sodium hydroxide solution in (2) is added, magnetic is added and turns
Son, 1000rad/min stirring is preheated to 40 DEG C on magnetic stirrer；
(4) solution that preheating finishes in (3) is put into use for laboratory microwave synthesizer, setting temperature is 60 DEG C, and power is
600W, time 20min, moderate-speed mixer, repeated flushing after filtering out flyash after solution restores to room temperature, 120 DEG C of bakings
It is dry；
(5) flyash of drying is weighed, weighs sodium metasilicate than the ratio that sodium metasilicate is 8: 1 in flyash, then press sodium metasilicate ratio
The ratio that aluminum sulfate is 1: 1.2 weighs aluminum sulfate, appropriate amount of deionized water is added in three after mixing, heating steams moisture
Hair, stops heating immediately when flyash multiplies paste, coating is made；
(6) paste flyash paste is wrapped on water-soluble chemical fertilizer particle when temperature is slightly lower (prevents chemical fertilizer temperature from crossing high score
Solution), will be by the molding chemical fertilizer granule of coating as in constant temperature drying box, 30 DEG C of temperature of setting, air pressure 0.08MPa vacuum and low temperature dry
Anti- water-soluble chemical fertilizer is formed to flyash shell within dry 4 hours.
3. a kind of preparation method of environmentally friendly flyash film-coated and slow release fertilizer according to claim 2, which is characterized in that
Flyash processing heavy metal step (1) is to be handled using EDTA-Ca flyash.
4. a kind of preparation method of environmentally friendly flyash film-coated and slow release fertilizer according to claim 2, which is characterized in that
The coating production method step (5) is to carry out double hydrolysis using sodium metasilicate and aluminum sulfate water resistant is made in modified coal ash bonding
Dissolubility coating.
5. a kind of preparation method of environmentally friendly flyash film-coated and slow release fertilizer according to claim 2, which is characterized in that
The coating production method step (5) is by by sodium metasilicate and aluminum sulfate mass ratio 1: 1.2, flyash and sodium metasilicate are 8: 1
Ratio is made.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811254230.5A CN109232090A (en) | 2018-10-16 | 2018-10-16 | A kind of environmentally friendly flyash film-coated and slow release fertilizer and preparation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811254230.5A CN109232090A (en) | 2018-10-16 | 2018-10-16 | A kind of environmentally friendly flyash film-coated and slow release fertilizer and preparation method |
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| Publication Number | Publication Date |
|---|---|
| CN109232090A true CN109232090A (en) | 2019-01-18 |
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ID=65082363
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811254230.5A Pending CN109232090A (en) | 2018-10-16 | 2018-10-16 | A kind of environmentally friendly flyash film-coated and slow release fertilizer and preparation method |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101456767A (en) * | 2007-12-11 | 2009-06-17 | 傅博 | Method for preparing composite coated slow-released fertilizer |
| CN104261985A (en) * | 2014-09-24 | 2015-01-07 | 中原工学院 | Method for preparing slow-release fertilizer from fly ash |
| CN108976040A (en) * | 2018-09-12 | 2018-12-11 | 郑忆依 | A method of using coal ash for manufacturing for slow-release fertilizer |
-
2018
- 2018-10-16 CN CN201811254230.5A patent/CN109232090A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101456767A (en) * | 2007-12-11 | 2009-06-17 | 傅博 | Method for preparing composite coated slow-released fertilizer |
| CN104261985A (en) * | 2014-09-24 | 2015-01-07 | 中原工学院 | Method for preparing slow-release fertilizer from fly ash |
| CN108976040A (en) * | 2018-09-12 | 2018-12-11 | 郑忆依 | A method of using coal ash for manufacturing for slow-release fertilizer |
Non-Patent Citations (3)
| Title |
|---|
| 刘元元等: "城市垃圾焚烧飞灰重金属药剂配伍稳定化实验研究", 《环境工程学报》 * |
| 左继成等: "氢氧化钠改性粉煤灰制吸附材料研究", 《沈阳理工大学学报》 * |
| 邹新华等: "凝胶制备对气相合成MCM-22沸石的影响", 《燃料化学学报》 * |
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Application publication date: 20190118 |