CN103664376A - Preparation method of coated controlled-release compound fertilizer - Google Patents
Preparation method of coated controlled-release compound fertilizer Download PDFInfo
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- CN103664376A CN103664376A CN201310664811.7A CN201310664811A CN103664376A CN 103664376 A CN103664376 A CN 103664376A CN 201310664811 A CN201310664811 A CN 201310664811A CN 103664376 A CN103664376 A CN 103664376A
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Abstract
The invention relates to a preparation method of a coated controlled-release compound fertilizer, which comprises preparation of a coating solution and coating of compound fertilizer granules. The preparation method comprises the following steps: in combination with common granulation equipment, under specific process conditions, synthesizing a fertilizer coating layer by taking degradable high molecular soil conditioner polyvinyl alcohol, natural high molecular starch and fertilizer sustained release agent as main components; and coating a granular compound fertilizer, thus preparing the coated controlled-release fertilizer integrating the functions of simultaneously realizing controlled release of nitrogen, phosphorus and potassium nutrients, having a degradable coating layer, improving soil and the like. The fertilizer efficiency duration is up to 60-100 days; the single-dose application of the fertilizer can satisfy the requirements of crops for nutrients during the whole growing season; and the loss of the fertilizer is effectively decreased, and the utilization ratio of the fertilizer is increased. The coating layer can be biologically degraded within 100 days; and the degraded components are harmless and non-toxic, and effectively improve the soil structure. Besides, the compound fertilizer is accessible in raw materials, simple in processing technique, low in cost and convenient to produce and use.
Description
Technical field
The present invention relates to a kind of preparation method of coated fertilizer.
Background technology
, easily there is leaching, the chemical reaction of fixing, volatilizing in the chemical fertilizer that is used for agriculture production, cause fertilizer nutrient loss serious in soil, and rate of utilization is low, and causes the consequences such as serious environmental pollution, soil block.
For improving the utilization ratio of fertilizer, this technician launches development, the production of coated fertilizer.But at present, fertilizer efficiency period is few in more than 70 days coated fertilizer existence fertilizer amounts in early stage, can not meet plant growth demand, and fertilizer practice difficulty is high, difficult to be controlled, and film material is difficult for the drawbacks such as degraded.
Summary of the invention
The object of this invention is to provide the release that a kind of production technique is simple, with low cost, can effectively control fertilizer nutrient, use that rear nutrient does not run off, fertilizer efficiency period is long, do not cause the coated release-controlled compound fertilizer of environmental pollution, to overcome above-mentioned difficulties.
For prior object of the present invention, technical scheme of the present invention is:
One, the proportioning of compound manure controlled release coating liquid and synthetic method:
Press coating liquid weight percent 5-20% extracting corn starch, the water of weight percent such as add, gelatinization under 83-97 ℃ of agitation condition, stirs 30-40 minute, makes gelatinization thing; The PVAC polyvinylalcohol that the molecular weight of getting again weight percent 5-10% is 1300-2000, adds the water of weight percent 25-40%, at 90-92 ℃, is dissolved into solution; PVAC polyvinylalcohol solution is added in corn starch paste compound, in homogenizer, stir 30-40 minute, after cooling, add weight percent is 0.1% Dyhard RU 100 powder, weight percent is 0.01% sulfuric acid copper powder, sulfuric acid zinc powder that weight percent is 0.01%, sulfuric acid iron powder that weight percent is 0.01%, sulfuric acid calcium powder that weight percent is 0.02% and the oyster shell whiting of weight percent 20-30%, then high-speed stirring proceeded to container for storing liquid after 10 minutes; Film is also sprayed to granulated fertilizer surface, and coating thickness weight is the 4-8% of coated fertilizer weight percent.
Two, compound fertilizer integument method:
1,, by the classification of plain particles fertilizer utilization reciprocating sieve, the particle of same granularity is produced for a collection of time;
2, pack the fertilizer after screening into granulating disc with heating function, preheating under the condition of 60 ℃, 10 minutes, rotary finishing fertilizer surface.
3, coating liquid is by pneumatic pump atomization, and within every 3 minutes, spraying fertilizer is surperficial, spray time 20 minutes, and coating thickness weight is the 4-8% of coated fertilizer weight percent, cooling rear packing.
Embodiment
Embodiment 1
Press coating liquid weight percent 15% extracting corn starch, the water of weight percent such as add, gelatinization under 90 ℃ of agitation conditions, stirs 30-40 minute, makes gelatinization thing; The PVAC polyvinylalcohol that the molecular weight of getting again weight percent 7% is 1500, adds the water of weight percent 30%, at 90 ℃, is dissolved into solution; PVAC polyvinylalcohol solution is added in corn starch paste compound, in homogenizer, stir 30 minutes, after cooling, add weight percent is 0.1% Dyhard RU 100 powder, weight percent is 0.01% sulfuric acid copper powder, sulfuric acid zinc powder that weight percent is 0.01%, sulfuric acid iron powder that weight percent is 0.01%, sulfuric acid calcium powder that weight percent is 0.02% and the oyster shell whiting of weight percent 25%, then high-speed stirring proceeded to container for storing liquid after 10 minutes; Film is also sprayed to granulated fertilizer surface, and coating thickness weight is 7% of coated fertilizer weight percent.
Claims (1)
1. a preparation method for coated release-controlled compound fertilizer, it comprises the synthetic and compound fertilizer integument of coating liquid, it is characterized in that:
Press coating liquid weight percent 5-20% extracting corn starch, the water of weight percent such as add, gelatinization under 83-97 ℃ of agitation condition, stirs 30-40 minute, makes gelatinization thing; The PVAC polyvinylalcohol that the molecular weight of getting again weight percent 5-10% is 1300-2000, adds the water of weight percent 25-40%, at 90-92 ℃, is dissolved into solution; PVAC polyvinylalcohol solution is added in corn starch paste compound, in homogenizer, stir 30-40 minute, after cooling, add weight percent is 0.1% Dyhard RU 100 powder, weight percent is 0.01% sulfuric acid copper powder, sulfuric acid zinc powder that weight percent is 0.01%, sulfuric acid iron powder that weight percent is 0.01%, sulfuric acid calcium powder that weight percent is 0.02% and the oyster shell whiting of weight percent 20-30%, then high-speed stirring proceeded to container for storing liquid after 10 minutes; Film is also sprayed to granulated fertilizer surface, and coating thickness weight is the 4-8% of coated fertilizer weight percent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310664811.7A CN103664376A (en) | 2013-12-09 | 2013-12-09 | Preparation method of coated controlled-release compound fertilizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310664811.7A CN103664376A (en) | 2013-12-09 | 2013-12-09 | Preparation method of coated controlled-release compound fertilizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103664376A true CN103664376A (en) | 2014-03-26 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310664811.7A Pending CN103664376A (en) | 2013-12-09 | 2013-12-09 | Preparation method of coated controlled-release compound fertilizer |
Country Status (1)
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| CN (1) | CN103664376A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105906433A (en) * | 2016-05-02 | 2016-08-31 | 张慧 | Compound fertilizer balanced in releasing |
| CN105948899A (en) * | 2016-05-02 | 2016-09-21 | 张慧 | Balanced compound fertilizer |
| CN109422578A (en) * | 2017-08-24 | 2019-03-05 | 吴鹃 | It is retained coating nitrogen-phosphorus-potassium compound fertilizer and preparation method thereof |
| CN111218289A (en) * | 2020-02-28 | 2020-06-02 | 湖南金旅环保股份有限公司 | Stabilizing agent for repairing heavy metal chromium pollution and preparation method and application thereof |
Citations (9)
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|---|---|---|---|---|
| JPS60103093A (en) * | 1983-11-04 | 1985-06-07 | 昭和電工株式会社 | Coating material for slow-effective fertilizer |
| DE4234909A1 (en) * | 1992-10-16 | 1994-04-21 | Leuna Werke Ag | Strengthening and conditioning of granulated ammonium sulphate with improved storage properties - by coating the granulate with dicyandiamide, calcium stearate, polyvinyl alcohol, glues and 2-methylstyrene-maleic anhydride copolymers |
| CN1535939A (en) * | 2003-04-09 | 2004-10-13 | 陈大顺 | Fertilizer coating composite, its making method and multicomponent coated granular fertilizer |
| CN1587233A (en) * | 2004-08-09 | 2005-03-02 | 沈阳农业大学 | Corn drought-resistant water preserving type film coated control releasing fertilizer and producing method |
| CN1587072A (en) * | 2004-08-09 | 2005-03-02 | 沈阳农业大学 | Rice low water permeability coated control release composite fertilizer and its producing method |
| CN1587235A (en) * | 2004-08-09 | 2005-03-02 | 沈阳农业大学 | Film coated control releasing lawn special fertilizer and its producing method |
| CN1234658C (en) * | 2004-01-18 | 2006-01-04 | 沈阳农业大学 | Method for preparation of coated release-controlled compound fertilizer |
| CN100999427A (en) * | 2006-12-31 | 2007-07-18 | 沈阳农业大学 | Film coated control release composite fertilizer special for regetables and its making method |
| CN101045656A (en) * | 2007-05-08 | 2007-10-03 | 沈阳农业大学 | Degradable fertilizer coating liquid and manufacturing method thereof |
-
2013
- 2013-12-09 CN CN201310664811.7A patent/CN103664376A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60103093A (en) * | 1983-11-04 | 1985-06-07 | 昭和電工株式会社 | Coating material for slow-effective fertilizer |
| DE4234909A1 (en) * | 1992-10-16 | 1994-04-21 | Leuna Werke Ag | Strengthening and conditioning of granulated ammonium sulphate with improved storage properties - by coating the granulate with dicyandiamide, calcium stearate, polyvinyl alcohol, glues and 2-methylstyrene-maleic anhydride copolymers |
| CN1535939A (en) * | 2003-04-09 | 2004-10-13 | 陈大顺 | Fertilizer coating composite, its making method and multicomponent coated granular fertilizer |
| CN1234658C (en) * | 2004-01-18 | 2006-01-04 | 沈阳农业大学 | Method for preparation of coated release-controlled compound fertilizer |
| CN1587233A (en) * | 2004-08-09 | 2005-03-02 | 沈阳农业大学 | Corn drought-resistant water preserving type film coated control releasing fertilizer and producing method |
| CN1587072A (en) * | 2004-08-09 | 2005-03-02 | 沈阳农业大学 | Rice low water permeability coated control release composite fertilizer and its producing method |
| CN1587235A (en) * | 2004-08-09 | 2005-03-02 | 沈阳农业大学 | Film coated control releasing lawn special fertilizer and its producing method |
| CN100999427A (en) * | 2006-12-31 | 2007-07-18 | 沈阳农业大学 | Film coated control release composite fertilizer special for regetables and its making method |
| CN101045656A (en) * | 2007-05-08 | 2007-10-03 | 沈阳农业大学 | Degradable fertilizer coating liquid and manufacturing method thereof |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105906433A (en) * | 2016-05-02 | 2016-08-31 | 张慧 | Compound fertilizer balanced in releasing |
| CN105948899A (en) * | 2016-05-02 | 2016-09-21 | 张慧 | Balanced compound fertilizer |
| CN109422578A (en) * | 2017-08-24 | 2019-03-05 | 吴鹃 | It is retained coating nitrogen-phosphorus-potassium compound fertilizer and preparation method thereof |
| CN111218289A (en) * | 2020-02-28 | 2020-06-02 | 湖南金旅环保股份有限公司 | Stabilizing agent for repairing heavy metal chromium pollution and preparation method and application thereof |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| C05 | Deemed withdrawal (patent law before 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140326 |