CN102093144A - Biodegradable coated urea - Google Patents
Biodegradable coated urea Download PDFInfo
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- CN102093144A CN102093144A CN2011100216888A CN201110021688A CN102093144A CN 102093144 A CN102093144 A CN 102093144A CN 2011100216888 A CN2011100216888 A CN 2011100216888A CN 201110021688 A CN201110021688 A CN 201110021688A CN 102093144 A CN102093144 A CN 102093144A
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- urea
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- mixed powder
- stearic acid
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Abstract
The invention discloses biodegradable coated urea, and relates to a sustained-release fertilizer. The biodegradable coated urea is characterized in that: the granular urea is formed by spraying melted stearic acid and then applying mixed powder, and consists of the following raw materials in part by weight: 100 parts of granular urea, 0.5 to 2.0 parts of stearic acid for coating and 1 to 1.5 parts of mixed powder for applying powder, wherein the mixed powder for applying powder consists of the following raw materials in percentage by weight: 5 to 10 percent of calcium stearate, 30 to 50 percent of magnesium oxide and the balance of kieselguhr. The invention provides the biodegradable coated urea product, which has biodegradable coating material, has no pollution, can improve the utilization efficiency of the fertilizer and reduce the production cost, and has low investment and remarkable benefit; the coating material can be degraded under the action of soil microbes, so pollution of the coating material to the environment is avoided, and ecological balance is favorable; and the urea coated by the coating has good sustained-release effect and round granular appearance, the product has no peculiar smell, and the utilization rate of nitrogen fertilizers is averagely improved by 15 to 20 percent.
Description
Technical field
The present invention relates to slow release fertilizer, particularly biodegradable coated carbamide.
Technical field
Urea is nitrogenous height; Fertilizer efficiency is fast, and the high-quality nitrogenous fertilizer that consumption is big takies main status in agricultural fertilizer.But, urea in use, run off by approach such as volatilization, leaching, decomposition and runoffs easily, cause the fertilizer efficiency utilization ratio not high, according to statistics, the this season utilization ratio has only about 30%, and this has not only caused the waste of chemical fertilizer, and the environment of depending on for existence for mankind such as atmosphere, water body soil pollutes.
In order to solve the problems of the technologies described above, at present, both at home and abroad sulphur and various macromolecule resins of adopting carry out the coating processing to urea more.Perhaps add uric acid inhibitor and nitrification inhibitor, utilize resene coating or other macromolecular material envelope type slow release release and release control fertilizers of plastics such as cyclochloride resin; Utilize to arrest the production of dissolubility fertilizer Wrapped fertilizer fertilizer integument type look around fertilizer etc.But there are the following problems for prior art, has to be solved:
Complex manufacturing, investment is big, production cost is high.
2. coated fertilizer is difficult to degraded, and life-time service can bring negative impact to soil; Even soil polluted, influence the quality of agricultural-food.
3. biodegradable coated fertilizer is not seen as yet.
Therefore, research and development are low-cost, pollution-free, can improve fertilizer utilization ratio again, and production technique is oversimplified, mass-producing, and less investment, the new slow release fertilizer product of remarkable benefit becomes the dominant direction of current chemical fertilizer industry.
Utilization of the present invention soil microorganisms again acts on coating and the lapping of the stearic acid of degraded down as nitrogenous fertilizer urea, can directly finish the manufacturing process of product in existing common composite fertilizer or production of compound fertilizer processing unit.
Summary of the invention
The objective of the invention is to avoid above-mentioned weak point of the prior art, and provide a kind of coated fertilizer biodegradable, pollution-free; can improve fertilizer utilization ratio again, reduce production costs, simplify production technique, mass-producing; less investment, the degradable coated carbamide product of remarkable benefit.In order to solve following technical problem:
Complex manufacturing, investment is big, production cost is high.
2. coated fertilizer is difficult to degraded, and life-time service can bring negative impact to soil; Even soil polluted, influence the quality of agricultural-food.
3. biodegradable coated fertilizer is not seen as yet.
Purpose of the present invention can reach by following measure:
Biodegradable coated carbamide of the present invention is characterized in that granular urea at first with the spraying of fusion stearic acid, and then forms with the mixed powder face powder, and is composed as follows according to the raw material of weight fraction meter:
Granular urea 100
Coating stearic acid 0.5～2.0
Face powder mixed powder 1.0～1.5
Wherein, described face powder is composed as follows according to the raw material of weight percentage meter with mixed powder:
Calcium stearate 5%～10%
Magnesium oxide 30%～50%
The diatomite surplus.
The coated fertilizer that the present invention adopts can be degraded under the soil microorganisms effect, and stearic acid is easy to decompose generation CO under the effect of soil microorganisms
2And H
2O has avoided the pollution of coated fertilizer to environment, helps the eubiosis; Urea behind the coating parcel not only have had good sustained release effect, and particle appearance is mellow and full, and product free from extraneous odour, utilization rate of nitrogen fertilizer on average improve 15%～20%.
The preparation method of biodegradable coated carbamide of the present invention is characterized in that comprising the steps:
1.. the face powder preparation of mixed powder
According to calcium stearate 5%～10%, magnesium oxide 30%～50%, surplus is diatomaceous proportioning raw materials, accurately takes by weighing each component of raw material respectively, mixes, and is standby;
2.. the stearic preparation of fusion
Coating, drops in the stearic acid fusion tank after accurately measuring according to prescription with stearic acid, is heated to molten state, and is standby;
3.. coating
Granular urea according to the accurate metering of prescription, 2. the fusion stearic acid for preparing with step, carry out spraying outside the particle in drum-type mixing granulation machine, make the particle outside surface of urea form coating as far as possible uniformly, stearic consumption is controlled at every 1000kg granular urea spraying 5～20kg;
Processing condition:
The warm air drying temperature is not higher than 80 ℃
The cooling draught temperature is not higher than 50 ℃;
4.. face powder
Granular urea after 3. step sprays coating, cooling, air-dry after, the mixed powder that 1. prepares with step is applied powder again, the mixed powder consumption is controlled at every 1000kg granular urea face powder 10～15kg;
5.. screening, metering, quality test, qualified back packing makes biodegradable coated carbamide.
Biodegradable coated carbamide of the present invention according to above method, can directly utilize composite fertilizer or production of compound fertilizer enterprise current production devices to drop into suitability for industrialized production, and low equipment investment, production cost comparison resene coated product reduce half.
The disclosed technical scheme of biodegradable coated carbamide of the present invention has following positive technique effect compared to existing technology:
1. provide a kind of coated fertilizer biodegradable, pollution-free, can improve fertilizer utilization ratio again, reduced production costs, simplified production technique, mass-producing, less investment, the degradable films urea product of remarkable benefit.Successfully solve the technical problem that exists in the prior art, obtained following positively effect:
2 production technique are simple, reduced investment, production cost are low.
3. coated fertilizer can be degraded under the soil microorganisms effect, has avoided the pollution of coated fertilizer to environment, helps the eubiosis; Urea behind the coating parcel not only have had good sustained release effect, and particle appearance is mellow and full, and product free from extraneous odour, utilization rate of nitrogen fertilizer on average improve 15%～20%.
4. can directly utilize composite fertilizer or production of compound fertilizer enterprise current production devices to drop into suitability for industrialized production, low equipment investment, production cost comparison resene coated product reduce half.
Embodiment
The present invention will now be further detailed embodiment:
Embodiment 1
According to following steps, produce biodegradable coated carbamide of the present invention
1.. the face powder preparation of mixed powder
Accurately take by weighing 5 kilograms of calcium stearates, 40 kilograms in magnesium oxide, 55 kilograms in diatomite mixes, and is standby;
2.. the stearic preparation of fusion
Accurately take by weighing coating with 5 kilograms of stearic acid, drop in the stearic acid fusion tank, be heated to molten state, standby;
3.. coating
Accurately take by weighing 1000 kilograms of granular ureas, the fusion stearic acid with 2. step prepares carries out spraying outside the particle in drum-type mixing granulation machine, makes the particle outside surface of urea form coating as far as possible uniformly;
Processing condition:
The warm air drying temperature is not higher than 80 ℃
The cooling draught temperature is not higher than 50 ℃;
4.. face powder
Granular urea after 3. step sprays coating, the cooling, air-dry after, the mixed powder that 1. prepares with step is applied powder again, the mixed powder consumption is controlled at 10～15kg;
5.. screening, metering, quality test, qualified back packing makes biodegradable coated carbamide.The products obtained therefrom particle appearance is mellow and full, and product free from extraneous odour, utilization rate of nitrogen fertilizer on average improve 15%～20%.
Product reaches following technical indicator:
N constituent content % 〉=40.5
Grain graininess mm 1～5
Moisture content wt%≤2.0.
Embodiment 2
According to following steps, produce biodegradable coated carbamide of the present invention
1.. the face powder preparation of mixed powder
Accurately take by weighing 8 kilograms of calcium stearates, 30 kilograms in magnesium oxide, 62 kilograms in diatomite mixes, and is standby;
2.. the stearic preparation of fusion
Accurately take by weighing coating with 10 kilograms of stearic acid, drop in the stearic acid fusion tank, be heated to molten state, standby;
3.. coating
Accurately take by weighing 1000 kilograms of granular ureas, the fusion stearic acid with 2. step prepares carries out spraying outside the particle in drum-type mixing granulation machine, makes the particle outside surface of urea form coating as far as possible uniformly;
Processing condition:
The warm air drying temperature is not higher than 80 ℃
The cooling draught temperature is not higher than 50 ℃;
4.. face powder
Granular urea after 3. step sprays coating, the cooling, air-dry after, the mixed powder that 1. prepares with step is applied powder again, the mixed powder consumption is controlled at 10～15kg;
5.. screening, metering, quality test, qualified back packing makes biodegradable coated carbamide.The products obtained therefrom particle appearance is mellow and full, and product free from extraneous odour, utilization rate of nitrogen fertilizer on average improve 15%～20%.
Product reaches following technical indicator:
N constituent content % 〉=40.5
Grain graininess mm 1～5
Moisture content wt%≤2.0.
Embodiment 3
According to following steps, produce biodegradable coated carbamide of the present invention
1.. the face powder preparation of mixed powder
Accurately take by weighing 10 kilograms of calcium stearates, 50 kilograms in magnesium oxide, 40 kilograms in diatomite mixes, and is standby;
2.. the stearic preparation of fusion
Accurately take by weighing coating with 20 kilograms of stearic acid, drop in the stearic acid fusion tank, be heated to molten state, standby;
3.. coating
Accurately take by weighing 1000 kilograms of granular ureas, the fusion stearic acid with 2. step prepares carries out spraying outside the particle in drum-type mixing granulation machine, makes the particle outside surface of urea form coating as far as possible uniformly;
Processing condition:
The warm air drying temperature is not higher than 80 ℃
The cooling draught temperature is not higher than 50 ℃;
4.. face powder
Granular urea after 3. step sprays coating, the cooling, air-dry after, the mixed powder that 1. prepares with step is applied powder again, the mixed powder consumption is controlled at 10～15kg;
5.. screening, metering, quality test, qualified back packing makes biodegradable coated carbamide.The products obtained therefrom particle appearance is mellow and full, and product free from extraneous odour, utilization rate of nitrogen fertilizer on average improve 15%～20%.
Product reaches following technical indicator:
N constituent content % 〉=40.5
Grain graininess mm 1～5
Moisture content wt%≤2.0.
Claims (2)
1. a biodegradable coated carbamide is characterized in that granular urea at first with the spraying of fusion stearic acid, and then forms with the mixed powder face powder, and is composed as follows according to the raw material of weight fraction meter:
Granular urea 100
Coating stearic acid 0.5～2.0
Face powder mixed powder 1.0～1.5
Wherein, described face powder is composed as follows according to the raw material of weight percentage meter with mixed powder:
Calcium stearate 5%～10%
Magnesium oxide 30%～50%
The diatomite surplus.
2. the preparation method of the biodegradable coated carbamide of claim 1 is characterized in that comprising the steps:
1.. the face powder preparation of mixed powder
According to calcium stearate 5%～10%, magnesium oxide 30%～50%, surplus is diatomaceous proportioning raw materials, accurately takes by weighing each component of raw material respectively, mixes, and is standby;
2.. the stearic preparation of fusion
Coating, drops in the stearic acid fusion tank after accurately measuring according to prescription with stearic acid, is heated to molten state, and is standby;
3.. coating
Granular urea according to the accurate metering of prescription, 2. the fusion stearic acid for preparing with step, carry out spraying outside the particle in drum-type mixing granulation machine, make the particle outside surface of urea form coating as far as possible uniformly, stearic consumption is controlled at every 1000kg granular urea spraying 5～20kg;
Processing condition:
The warm air drying temperature is not higher than 80 ℃
The cooling draught temperature is not higher than 50 ℃;
4.. face powder
Granular urea after 3. step sprays coating, cooling, air-dry after, the mixed powder that 1. prepares with step is applied powder again, the mixed powder consumption is controlled at every 1000kg granular urea face powder 10～15kg;
5.. screening, metering, quality test, qualified back packing makes biodegradable coated carbamide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100216888A CN102093144B (en) | 2011-01-19 | 2011-01-19 | Biodegradable coated urea |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100216888A CN102093144B (en) | 2011-01-19 | 2011-01-19 | Biodegradable coated urea |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102093144A true CN102093144A (en) | 2011-06-15 |
| CN102093144B CN102093144B (en) | 2012-11-21 |
Family
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Family Applications (1)
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| CN2011100216888A Active CN102093144B (en) | 2011-01-19 | 2011-01-19 | Biodegradable coated urea |
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Cited By (23)
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| CN102775254A (en) * | 2012-08-29 | 2012-11-14 | 刘彦坤 | Method for producing special multi-element fertilizer for rice from kieselguhr |
| CN103058755A (en) * | 2012-12-26 | 2013-04-24 | 施可丰化工股份有限公司 | Slow release compound fertilizer applicable to plantation of cotton |
| CN103058753A (en) * | 2012-12-26 | 2013-04-24 | 施可丰化工股份有限公司 | Slow release compound fertilizer applicable to plantation of soybeans |
| CN103058760A (en) * | 2012-12-26 | 2013-04-24 | 施可丰化工股份有限公司 | Slow release compound fertilizer applicable to plantation of tobacco |
| CN103058752A (en) * | 2012-12-26 | 2013-04-24 | 施可丰化工股份有限公司 | Preparation method for special slow-release long-acting compound fertilizer for paddy rice |
| CN103058757A (en) * | 2012-12-26 | 2013-04-24 | 施可丰化工股份有限公司 | Preparation method for special slow-release long-acting compound fertilizer for vegetable |
| CN103058761A (en) * | 2012-12-26 | 2013-04-24 | 施可丰化工股份有限公司 | Slow release compound fertilizer applicable to plantation of wheat |
| CN103058758A (en) * | 2012-12-26 | 2013-04-24 | 施可丰化工股份有限公司 | Slow release compound fertilizer applicable to plantation of vegetable |
| CN103058756A (en) * | 2012-12-26 | 2013-04-24 | 施可丰化工股份有限公司 | Preparation method for special slow-release long-acting compound fertilizer for cotton |
| CN103058751A (en) * | 2012-12-26 | 2013-04-24 | 施可丰化工股份有限公司 | Preparation method for special slow-release long-acting compound fertilizer for corn |
| CN103058762A (en) * | 2012-12-26 | 2013-04-24 | 施可丰化工股份有限公司 | Slow-release compound fertilizer suitable for fruit tree planting |
| CN103058754A (en) * | 2012-12-26 | 2013-04-24 | 施可丰化工股份有限公司 | Slow-release compound fertilizer applicable to plantation of corn |
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| CN103058753B (en) * | 2012-12-26 | 2015-04-22 | 施可丰化工股份有限公司 | Slow release compound fertilizer applicable to plantation of soybeans |
| CN103351205B (en) * | 2012-12-26 | 2015-04-22 | 施可丰化工股份有限公司 | Preparation method of special controlled-release long-acting composite fertilizer for fruit trees |
| CN103058755A (en) * | 2012-12-26 | 2013-04-24 | 施可丰化工股份有限公司 | Slow release compound fertilizer applicable to plantation of cotton |
| CN103113153B (en) * | 2012-12-26 | 2016-02-24 | 施可丰化工股份有限公司 | The preparation method of the sustained-release long-acting compound fertilizer that tobacco is special |
| CN104705535A (en) * | 2013-12-11 | 2015-06-17 | 上海美农生物科技股份有限公司 | Sustain-released urea for producing feed and preparation method thereof |
| CN107586189A (en) * | 2017-07-18 | 2018-01-16 | 湖北富邦科技股份有限公司 | A kind of preparation method of the special damp-proof urea of Blending Fertilizer |
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| CN102093144B (en) | 2012-11-21 |
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