CN102976871B - Production method of special network controlled-release fertilizer for eucalyptus - Google Patents
Production method of special network controlled-release fertilizer for eucalyptus Download PDFInfo
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- CN102976871B CN102976871B CN201210569439.7A CN201210569439A CN102976871B CN 102976871 B CN102976871 B CN 102976871B CN 201210569439 A CN201210569439 A CN 201210569439A CN 102976871 B CN102976871 B CN 102976871B
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Abstract
The invention relates to a production method of a special network controlled-release fertilizer for eucalyptus, belonging to the technical field of preparation of fertilizers. The production method comprises the following steps: adding granular urea and monoammonium phosphate which are preheated to 50-100 DEG C into a rotating drum coating machine, and coating with a coating material; after finishing the coating, adding a potassium fertilizer and magnesium sulfate, evenly mixing, and adding the mixture into an extrusion granulator to carry out extrusion granulation; and curing and cooling the granulated semi-finished product by standing at natural temperature for 1-30 hours, and screening to obtain the finished product. The special network controlled-release fertilizer for eucalyptus with the diameter of 10-100 millimeters and the weight of 10-500g can be produced according to the size of the mold of the extrusion granulator. Compared with the common coated controlled-release fertilizer, the special network controlled-release fertilizer for eucalyptus has the advantages of lower cost, stable nutrient release, uniform nutrition in every granule, and fixed weight, can implement precise fertilizer application, and reduces the fertilizer application frequency and labor investment.
Description
Technical field
The present invention relates to a kind of production method of eucalyptus dedicated network Controlled Release Fertilizer, belong to technical field of fertilizer manufacture, what be specifically related to is with the technological method for main raw material manufacture network structure eucalyptus controlled release special fertilizer such as urea, monoammonium phosphate, Repone K, potassium sulfate.
Background technology
Release and release control fertilizer refers to that presetting nutrient in fertilizer with various regulatory mechanism makes its fertilizer consistent with the rule of Crop nutrient at the release mode (release rate and time of releasing) of crop growing season.After common incorporation of fertilizerin the soil, early stage, Releasing nutrient was excessive, and plant cannot absorb at short notice completely, and nutrient easily volatilizees, leaching loss or by soil fixing, and the later stage lacks nutrient, so the average utilization of common fertilizer only has about 35%.Controlled Release Fertilizer then can carry out Co ntrolled release according to crop Different growth phases to the demand of nutrient, thus reduces the loss of fertilizer, and utilization rate of fertilizer can reach about 70%.
At present, Controlled Release Fertilizer mainly refers to insensitive coated fertilizers of factor such as biological and chemical effects, namely wraps a skim on the surface of traditional readily avaiable fertilizer, is diffused into the speed outside film by nutrient in the micropore controlling diaphragm on film.The principal element affecting coating controlled-release fertilizer nutrients release is the soil moisture and humidity, and microorganism, the pH value of soil then do not affect the release of Controlled Release Fertilizer.The key that Controlled Release Fertilizer makes is selection and the coating process of mould material.Mould material is mainly divided into inorganic coating material and organic coated material, common inorganic coating material has sulphur, highly surface activated mineral, the peat composed of rotten mosses, silicate etc., although inorganic coating material cost is lower, and harm is not formed to soil, multiple base cation can be provided for plant simultaneously, there is certain slow release effect; But inorganics coat fertilizer poor flexibility, easily crisp, controlled-release effect is not good.Therefore, increasing investigator focuses in the research of organic materials.Organic coated material is divided into natural polymer coated fertilizer and the large class of synthetic polymer coated fertilizer two.Natural polymer coated fertilizer is cheap and easy to get, nontoxic, good film-forming property, but be easily biodegradable, controlled-release effect is poor, synthetic polymer coated fertilizer mainly comprises thermosetting resin, thermoplastic resin and polyolefins etc., there is the advantages such as membrane wrapping thickness is controlled, insensitive to edaphic condition, nutrient release rate is controlled, therefore, future development potentiality are high.
The general method of capsule for controlled release fertilizer has prilling tower spray method, fluidized bed coating method, rotary drum or disk cladding process etc.At present, most polymers coated fertilizer adopts prilling tower spray method and fluidized bed coating method coating, but the technological operation of prilling tower spray method is loaded down with trivial details, fluidized bed coating method is then the method for batch production coated fertilizer, production efficiency is low, industrial scale is little, needs to use a large amount of organic solvent and difficult recovery in technique.And rotating disk or rotary drum spraying coating method equipment simple, easy to operate, easily realize mass-producing, continuous prodution, and purposes is extremely wide, both can be used for the coating of finished product fertilizer, and also can be used for powder granulation of fertilizer and coating.Although the method can be very fast because of the relative movement between finished particle and between finished particle and drum inner wall, colliding stronger, there is more defect in coating layer usually, and multistage coating process can be adopted to solve this problem.
Eucalyptus is one of three large quick growing species of treess, its strong adaptability, and assortment is various, of many uses, and economic worth is high, is very rare short period industrial cut stock seeds.Because Eucalyptus is rapid, in woods, Nutrient Cycling is fast, therefore, high to the demand of soil nutrient, but fertilizer dedicated to eucalyptus commercially available is at present powdery or small-particle fertilizer, its fertilising is divided into base manure and topdresses, eucalyptus at least will be topdressed 3 years after planting, otherwise is just difficult to the advantage playing eucalyptus fast-growing.Topdress time-consuming and add cost, being also difficult to accurately grasp rate of fertilizer application, easily cause rate of fertilizer application not enough or apply fertilizer excessive.Therefore, we have invented a kind of eucalyptus dedicated network Controlled Release Fertilizer and production method thereof.It is by adding coated fertilizer and use rotary drum seed-coating machine coating in fertilizer, then extruder grain forms.Products obtained therefrom is macrobead Controlled Release Fertilizer, and each particle nutrient is balanced, and weight can be tens grams, also can up to a few hectogram.The controlled release phase of product is controlled from 1 month ~ 2 years.This eucalyptus dedicated network Controlled Release Fertilizer not only can reduce fertilizer application frequency and artificial input, and can realize Tree Precise Fertilization; Compared with common coating controlled-release fertilizer, when rate of fertilizer application is identical, nutrients release is more slow, and the controlled release phase is longer.
Summary of the invention
The present invention seeks to using urea, particle monoammonium phosphate as core, coated fertilizer is wrapped on urea and particle monoammonium phosphate, urea after coating and monoammonium phosphate and Repone K or the blending such as potassium sulfate, magnesium sulfate also carry out extruder grain, obtained finished product after solidification, naturally cooling, screening.
The present invention is achieved in that and first joins in rotary drum seed-coating machine and carry out coating by through being preheating to granular urea between 50 DEG C ~ 100 DEG C and monoammonium phosphate with coated fertilizer; After coating, add potash fertilizer, magnesium sulfate, mix, compound is joined in Squeezinggranulator and carry out extruder grain; Work in-process after granulation solidify through the placement of 1 ~ 30 hour and cool under natural temperature, and after screening, system is to finished product.
A kind of eucalyptus dedicated network Controlled Release Fertilizer in the present invention is binary fertilizer also can be that ternary is fertile, and nitrogen, Vanadium Pentoxide in FLAKES, potassium oxide content can be determined according to recipe requirements.Nitrogen, Vanadium Pentoxide in FLAKES, potassium oxide content summation general control are 20 ~ 50%.
The coated fertilizer component added in the present invention is (being weight part): nitro-cotton 7-30 part, modification of flax oil aniline formaldehyde resin 1-6 part, MALEIC ANHYDRIDE MIN 99.5 rosin ester 2-10 part, middle oily ricinoleyl alcohol acid resin 5-20 part, phthalic acid dibutyl ester 2-10 part, mixed solvent 30-80 part; Wherein mixed solvent recipe ingredient is (being weight part): alcohol 1-5 part, butanols 3-10 part, vinyl acetic monomer 5-20 part, N-BUTYL ACETATE 8-30 part, toluene 10-50 part.
The coated fertilizer total amount added in the present invention is 2 ~ 10% of fertilizer total amount.
Eucalyptus dedicated network Controlled Release Fertilizer in the present invention is spheroid shape shape.According to the mould size of Squeezinggranulator can produce diameter 10 ~ 100 millimeters, weight is at the particle of 10 ~ 500 grams.
The eucalyptus dedicated network Controlled Release Fertilizer controlled release phase of producing according to present invention process is controlled from 1 month ~ 2 years, and the length of controlled release phase is relevant with coated fertilizer add-on.Coated fertilizer add-on is more, and the controlled release phase is longer.
Present invention process technology has the following advantages.
1, eucalyptus dedicated network Controlled Release Fertilizer is compared with common coated fertilizer, and product particle is large, and when rate of fertilizer application is identical, nutrients release is more slow, and the controlled release phase is longer.
2, eucalyptus dedicated network Controlled Release Fertilizer is compared with common coated fertilizer, every fertilizer nutrient equilibrium, not only applies fertilizer convenient and can realize Tree Precise Fertilization.
3, eucalyptus dedicated network Controlled Release Fertilizer is compared with common coated fertilizer, and nutrients release temperature influence is little, discharges more stable.
4, present invention process flow process is short, flexible to operation.
5, present invention process yield rate after screening can reach 99%.Returning charge is little.
Accompanying drawing explanation
Fig. 1 is a kind of production technological process of eucalyptus dedicated network Controlled Release Fertilizer.
Embodiment
By following instance, processing method of the present invention is described.But example is not limitation of the present invention.
Example 1.
The configuration of coated fertilizer: nitro-cotton 7.10 kilograms, modification of flax oil aniline formaldehyde resin 1.50 kilograms, MALEIC ANHYDRIDE MIN 99.5 rosin ester 2.50 kilograms, middle oily ricinoleyl alcohol acid resin 5.00 kilograms, phthalic acid dibutyl ester 2.50 kilograms, mixed solvent 31.40 kilograms are mixed for subsequent use; Wherein mixed solvent formula is: alcohol 1.40 kilograms, 2.80 kilograms, butanols, vinyl acetic monomer 5.25 kilograms, N-BUTYL ACETATE 8.75 kilograms, toluene 13.20 kilograms.
First by granular urea (nitrogenous 46%) double centner through being preheating to 75 degree and monoammonium phosphate (nitrogenous 11%, containing Vanadium Pentoxide in FLAKES 44%) 500 kilograms join in rotary drum seed-coating machine, the above-mentioned coated fertilizer prepared 50 kilograms is evenly joined on the material in rotary drum seed-coating machine and carries out coating.After coating, add 300 kilograms, Repone K (potassium oxide content 50%), magnesium sulfate double centner successively, after mixing, compound is joined in Squeezinggranulator and carry out extruder grain.Work in-process after granulation solidify through the placement of 10 hours and cool under natural temperature, obtained finished product after screening.The product total nutrient obtained: nitrogen, Vanadium Pentoxide in FLAKES, potassium oxide content are respectively 9.62%, 20.95 %, 14.29%, are mass percent.
Example 2.
The configuration of coated fertilizer: nitro-cotton 14.00 kilograms, modification of flax oil aniline formaldehyde resin 2.80 kilograms, MALEIC ANHYDRIDE MIN 99.5 rosin ester 2.10 kilograms, middle oily ricinoleyl alcohol acid resin 7.00 kilograms, phthalic acid dibutyl ester 4.90 kilograms, mixed solvent 39.20 kilograms are mixed for subsequent use; Wherein mixed solvent formula is: alcohol 1.57 kilograms, 3.14 kilograms, butanols, vinyl acetic monomer 5.25 kilograms, N-BUTYL ACETATE 7.80 kilograms, toluene 21.44 kilograms.
First by the granular urea (nitrogenous 46%) 150 kilograms through being preheating to 65 degree and monoammonium phosphate (nitrogenous 11%, containing Vanadium Pentoxide in FLAKES 44%) 450 kilograms join in rotary drum seed-coating machine, the above-mentioned coated fertilizer prepared 70 kilograms is evenly joined on the material in rotary drum seed-coating machine and carries out coating.After coating, add potassium sulfate (potassium oxide content 50%) 380 kilograms, 150 kilograms, magnesium sulfate successively, after mixing, compound is joined in Squeezinggranulator and carry out extruder grain.Work in-process after granulation solidify through the placement of 15 hours and cool under natural temperature, obtain finished product after screening.The product total nutrient obtained: nitrogen, Vanadium Pentoxide in FLAKES, potassium oxide content are respectively 9.88%, 16.50 %, 15.83%, are mass percent.
Claims (1)
1. a production method for eucalyptus dedicated network Controlled Release Fertilizer, is characterized in that the step of the method comprises:
(1) coated fertilizer total amount is 2 ~ 10% of fertilizer total amount, the each component proportion of coated fertilizer is parts by weight, and ratio range is as follows: nitro-cotton 7-30 part, modification of flax oil aniline formaldehyde resin 1-6 part, MALEIC ANHYDRIDE MIN 99.5 rosin ester 2-10 part, middle oily ricinoleyl alcohol acid resin 5-20 part, phthalic acid dibutyl ester 2-10 part, mixed solvent 30-80 part; Wherein mixed solvent ratio range is as follows: alcohol 1-5 part, butanols 3-10 part, vinyl acetic monomer 5-20 part, N-BUTYL ACETATE 8-30 part, toluene 10-50 part; Coated fertilizer is mixed for subsequent use;
(2) production of eucalyptus dedicated network Controlled Release Fertilizer: first join in rotary drum seed-coating machine and carry out coating by through being preheating to granular urea between 50 DEG C ~ 100 DEG C and monoammonium phosphate with coated fertilizer; After coating, add potash fertilizer, magnesium sulfate, mix, compound is joined in Squeezinggranulator and carry out extruder grain; Work in-process after granulation solidify through the placement of 1 ~ 30 hour and cool under natural temperature, obtained finished product after screening.
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| CN104261975B (en) * | 2014-09-15 | 2017-10-10 | 迪斯科科技集团（宜昌）有限公司 | Desinsection controlled release fertilizer dedicated to eucalyptus and preparation method thereof |
| CN104446994B (en) * | 2014-12-03 | 2017-05-24 | 林海涛 | Special water-soluble fertilizer for cucumber under protected cultivation prepared from obsolete disabled single-base propellant and preparation method of water-soluble fertilizer |
| CN112142517A (en) * | 2020-09-28 | 2020-12-29 | 西安唯拓尔农业科技有限公司 | Large-particle slow and controlled release fertilizer |
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| US7410522B2 (en) * | 2000-11-08 | 2008-08-12 | Kerry Green | Fertilizer |
| CN102001890A (en) * | 2010-12-10 | 2011-04-06 | 合肥工业大学 | Rosin-attapulgite-paraffin composite coated slow-release nitrogen fertilizer and preparation method thereof |
| CN202072642U (en) * | 2011-03-16 | 2011-12-14 | 安徽省司尔特肥业股份有限公司 | Slow release compound fertilizer special for eucalyptus |
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| JP2008007447A (en) * | 2006-06-28 | 2008-01-17 | Sumitomo Chemical Co Ltd | Method for suppressing generation of dollarspot disease of grass |
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Patent Citations (3)
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|---|---|---|---|---|
| US7410522B2 (en) * | 2000-11-08 | 2008-08-12 | Kerry Green | Fertilizer |
| CN102001890A (en) * | 2010-12-10 | 2011-04-06 | 合肥工业大学 | Rosin-attapulgite-paraffin composite coated slow-release nitrogen fertilizer and preparation method thereof |
| CN202072642U (en) * | 2011-03-16 | 2011-12-14 | 安徽省司尔特肥业股份有限公司 | Slow release compound fertilizer special for eucalyptus |
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| 一种新型大颗粒控制释放林木肥的研究与开发;张文辉 等;《林业实用技术》;20051031(第10期);第10-11页 * |
| 大颗粒缓控释肥料的研制及评价;吴庆伟;《中国优秀硕士学位论文》;20120929;第13-26页 * |
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