CN1260189C - Slowly controlled releasing sulfur-containing urea and its prepn process - Google Patents
Slowly controlled releasing sulfur-containing urea and its prepn process Download PDFInfo
- Publication number
- CN1260189C CN1260189C CNB2004100417054A CN200410041705A CN1260189C CN 1260189 C CN1260189 C CN 1260189C CN B2004100417054 A CNB2004100417054 A CN B2004100417054A CN 200410041705 A CN200410041705 A CN 200410041705A CN 1260189 C CN1260189 C CN 1260189C
- Authority
- CN
- China
- Prior art keywords
- sustained release
- release dosage
- urea
- ground limestone
- slow release
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Fertilizers (AREA)
Abstract
The present invention discloses controlled slow release urea containing sulfur and a preparation method thereof, particularly novel long-acting slow release environmentally friendly fertilizer which is prepared from urea, sulphur, liquid paraffin, and slow release agents A and B, wherein the slow release agents A are prepared by mixing purified bentonite, modified zeolite powder and ground limestone; the slow release agents B are prepared by mixing ground limestone, anhydrous magnesium sulfate and magnesium oxide. In the preparation method, the slow release agents A and partial urea are mixed as master batches, the rest urea is gunited and granulated after being melted, and the novel cheap controlled slow release urea containing sulfur with slow release, little fluxion, high utilization rate and improved ecological environment is prepared by three-step working procedures of sulphur coating, slow release agent B coating and liquid paraffin coating. The present invention can not only enhance the nitrogen utilization ratio, but also replenish sulfur elements, secondary elements and trace elements for soil, so that the farmland ecosystem is restored to balance step by step.
Description
Technical field
The present invention relates to a kind of fertilizer, specifically is a kind of control slowly-releasing sulfur-coated urea and preparation method thereof.
Background technology
China's peasant habit topdresses or base manure with the urea of quick-dissolving instant effect, and is time-consuming, has high input, and loss is many, output is few, low, the contaminate environment of utilization ratio, and the western countries peasant likes making base manure with slow release long-acting urea, need not topdress, saving of work and time, and ecological environment benefit is very good.But western countries' slow-release carbamide is too high because of manufacturing cost, and sale price is very expensive, and peasant still input cost is excessive.
Existing slow-release carbamide, adopt more aldehydes or quinones as sustained release dosage and macromolecular material as the coating agent, the cost height, the controlled release time is oversize, makes crop lack nutrition in earlier stage, also causes secondary environmental pollution to soil easily.
Summary of the invention
The purpose of this invention is to provide and tally with the national condition and the cheap sulfur-bearing long-acting nitrogen fertilizer new variety of agricultural feelings---control slowly-releasing sulfur-coated urea, discharge slow, run off less, the utilization ratio height, improve the soil, reduce environmental pollution and promote the Agro-ecology balance.
The objective of the invention is to realize by following scheme:
A kind of control slowly-releasing sulfur-coated urea is characterized in that by the weight part of following component formulated:
Urea 679～880
Sulphur 85～121
Sustained release dosage A+B 35～200
Liquid cured 1～2
Wherein, sustained release dosage A
Refining wilkinite 20～30
Modified zeolite powder 40～60
Water-ground limestone 20～30
Sustained release dosage B
Water-ground limestone 20～30
Anhydrous magnesium sulfate 20～30
Magnesium oxide 40～60.
Described a kind of control slowly-releasing sulfur-coated urea is characterized in that by following component formulated:
Urea 880
Sulphur 85
Sustained release dosage A+B 35
Liquid cured 1～2
Sustained release dosage A (standby behind three kinds of abundant mixings of raw material, as to be mainly used in the inner slow releasing function that rises of product)
Refining wilkinite 25
Modified zeolite powder 50
Water-ground limestone 25
Sustained release dosage B (standby behind three kinds of abundant mixings of raw material, be mainly used in the product outside and play the controlled release effect, wherein anhydrous magnesium sulfate is as the adventitia pore-creating agent)
Water-ground limestone 25
Anhydrous magnesium sulfate 25
Magnesium oxide 50.
By the product that above-mentioned prescription makes, total nitrogen content 〉=40%, total sulfur 〉=8%, nitrogen utilization efficiency improves 5～10 percentage points, and fertilizer efficiency period prolongs 60～80 days, waits nitrogen amount volume increase about 10%.
Described a kind of control slowly-releasing sulfur-coated urea is characterized in that by following component formulated:
Urea 775
Sulphur 85
Sustained release dosage A+B 140
Liquid cured 1～2
Sustained release dosage A
Refining wilkinite 25
Modified zeolite powder 50
Water-ground limestone 25
Sustained release dosage B
Water-ground limestone 25
Anhydrous magnesium sulfate 25
Magnesium oxide 50.
By the product that above-mentioned prescription makes, total nitrogen content 〉=35%, total sulfur 〉=8%, nitrogen utilization efficiency improves 10 percentage points, and fertilizer efficiency period prolongs 70～90 days, waits nitrogen amount volume increase about 15%.
Described a kind of control slowly-releasing sulfur-coated urea is characterized in that by following component formulated:
Urea 679
Sulphur 85
Sustained release dosage A+B 236
Liquid cured 1～2
Sustained release dosage A
Refining wilkinite 25
Modified zeolite powder 50
Water-ground limestone 25
Sustained release dosage B
Water-ground limestone 25
Anhydrous magnesium sulfate 25
Magnesium oxide 50.
By the product that above-mentioned prescription makes, total nitrogen content 〉=30%, total sulfur 〉=8%, nitrogen utilization efficiency improves 15 percentage points, and fertilizer efficiency period prolongs 90～120 days, waits nitrogen amount volume increase about 20%.
The refining wilkinite that the present invention adopts is 200 orders, and modified zeolite powder is 150 orders, and water-ground limestone is the nano level powder; Anhydrous magnesium sulfate is the lenticular small-particle, and magnesium oxide is 400 orders.
Among the present invention among the sustained release dosage A+ sustained release dosage B weight percent of two components be:
Sustained release dosage A 30%～70%
Surplus is sustained release dosage B
Comparatively preferred ratio is:
Sustained release dosage A 70%
Surplus 30% is sustained release dosage B.
Described a kind of preparation method of controlling the slowly-releasing sulfur-coated urea is characterized in that comprising the following steps:
At first partly the urea and the sustained release dosage A of (60%) weight (account for A; the B total amount 30%～70%) make masterbatch by measuring in the back input rotary drum whitewashing coating granulation machine; again with the urea of (40% weight) of remainder by being melt into urine in the melting device; then with spray gun with urine sprinkling pelleting on masterbatch; pass through rotary drum dryer again; pure hot-air dry with 80～100 ℃; through sieving out the qualified particle of diameter 0.85～2.8mm; once wrap up on above-mentioned particle, spraying after the sulphur fusion; with coating machine sustained release dosage B is balancedly filled up particulate slit and parcel again after the cooling, and then coat liquid cured carry out for the third time peplos final product.
Compare with prior art, product of the present invention is applied to various farm crop, and particularly cash crop make base manure, need not secondary and topdresses, and both saves labor, and abridged edition increases income again.Because the particle dissolving is slow, release is slow, it is few to run off, and has improved nitrogen utilization efficiency, has reduced environmental pollution.Because the synergism of element sulphur has further improved Soil structure and has improved crop quality.Product of the present invention more adapts to big machinery fertilising operations such as aircraft because particle is big, and uniformity coefficient and roundness are good, and is nontoxic pollution-free.
Description of drawings
Accompanying drawing is a process flow sheet of the present invention.
Embodiment
Embodiment 1:
The component prescription of present embodiment is:
N46% urea 880kg S99.95% sulphur 85kg
The cured 1-2kg of sustained release dosage A+B 35kg 100% liquid.
Sustained release dosage A:
Refining wilkinite (200 order) 25% (weight ratio)
Modified zeolite powder (150 order) 50% (weight ratio)
Water-ground limestone (nano level) 25% (weight ratio)
Standby behind three kinds of abundant mixings of raw material, be mainly used in the inner slow releasing function that rises of product.
Sustained release dosage B:
Water-ground limestone (nano level) 25% (weight ratio)
Anhydrous magnesium sulfate (lenticular) 25% (weight ratio)
Agricultural magnesium oxide (400 order) 50% (weight ratio)
Standby behind three kinds of abundant mixings of raw material, be mainly used in the product outside and play the controlled release effect, wherein anhydrous magnesium sulfate is as the adventitia pore-creating agent.
The preparation method:
N46% urea (60% weight ratio) and sustained release dosage A (are accounted for sustained release dosage A; the B gross weight 70%) continuously measure with belted electronic balance respectively after; utilize rotary conveyor continuously to be transported in the rotary drum whitewashing coating granulation machine (hereinafter referred to as " masterbatch "); urea (40% weight ratio) measured to invest in the anhydrous Flashmelt device in proportion be melt into urine; use the electronic grout flow meter automatic gauge; by special urine pump urine is continuously sprayed on " masterbatch " with spray gun then; granule " masterbatch " is increased fast and continuously flow out tablets press and enter dryer again to carry out the big air quantity of low temperature air-dry (because of this tablets press adopts anhydrous; no vapour spray granulating; half product water content is extremely low); particle after air-dry is by screening; again pulverize the back above the particle of ￠ 0.85～2.8mm standard and return granulation again as granule " masterbatch " with the particle that is lower than above-mentioned standard; the particle that meets above-mentioned standard enters sulphur solution coating machine (be about to sulphur with the fusion of Flashmelt device then pass through volume pump) again; spray into by on the qualified particle that measures with spray gun; after the cooling sustained release dosage B (is accounted for sustained release dosage A; the B gross weight 30%) fill up in the particulate slit and parcel; and then it is cured as peplos to coat micro-liquid, metering packing.
Embodiment 2:
The component prescription of present embodiment is:
N46% urea 775kg
S99.95% sulphur 85kg
Sustained release dosage A+B 140kg
Cured 1～the 2kg of 100% liquid
Wherein sustained release dosage A is 70kg, and sustained release dosage B is 70kg.
All the other are with example 1.
Embodiment 3:
The component prescription of present embodiment is:
N46% urea 679kg
Sulphur 85kg
Sustained release dosage A-B 236kg
Cured 1～the 2kg of liquid
Sustained release dosage A 100kg wherein, sustained release dosage B 136kg
All the other are with example 1.
Claims (6)
1, a kind of control slowly-releasing sulfur-coated urea is characterized in that by the weight part of following component formulated:
Urea 679～880
Sulphur 85～121
Sustained release dosage A+B 35～200
Liquid cured 1～2
Wherein, sustained release dosage A
Refining wilkinite 20～30
Modified zeolite powder 40～60
Water-ground limestone 20～30
Sustained release dosage B
Water-ground limestone 20～30
Anhydrous magnesium sulfate 20～30
Magnesium oxide 40～60
The weight percent of two components is among the sustained release dosage A+ sustained release dosage B
Sustained release dosage A 30%～70%
Surplus is sustained release dosage B.
2, a kind of control slowly-releasing sulfur-coated urea is characterized in that by the weight part of following component formulated:
Urea 679
Sulphur 85
Sustained release dosage A+B 236
Liquid cured 1～2
Sustained release dosage A
Refining wilkinite 25
Modified zeolite powder 50
Water-ground limestone 25
Sustained release dosage B
Water-ground limestone 25
Anhydrous magnesium sulfate 25
Magnesium oxide 50.
3, a kind of control slowly-releasing sulfur-coated urea according to claim 1 is characterized in that by following component formulated:
Urea 880
Sulphur 85
Sustained release dosage A+B 35
Liquid cured 1～2
Sustained release dosage A
Refining wilkinite 25
Modified zeolite powder 50
Water-ground limestone 25
Sustained release dosage B
Water-ground limestone 25
Anhydrous magnesium sulfate 25
Magnesium oxide 50
The weight percent of two components is among the sustained release dosage A+ sustained release dosage B
Sustained release dosage A 70%
Surplus is sustained release dosage B.
4, a kind of control slowly-releasing sulfur-coated urea according to claim 1 is characterized in that by following component formulated:
Urea 775
Sulphur 85
Sustained release dosage A+B 145
Liquid cured 1～2
Sustained release dosage A
Refining wilkinite 25
Modified zeolite powder 50
Water-ground limestone 25
Sustained release dosage B
Water-ground limestone 25
Anhydrous magnesium sulfate 25
Magnesium oxide 50
The weight percent of two components is among the sustained release dosage A+ sustained release dosage B
Sustained release dosage A 70%
Surplus is sustained release dosage B.
5, a kind of control slowly-releasing sulfur-coated urea according to claim 1 is characterized in that refining wilkinite is 200 orders, and modified zeolite powder is 150 orders, and water-ground limestone is the nano level powder; Anhydrous magnesium sulfate is a lenticular, and magnesium oxide is 400 orders.
6, a kind of preparation method of controlling the slowly-releasing sulfur-coated urea according to claim 1 is characterized in that comprising the following steps:
At first urea and the sustained release dosage A with gross weight 60% makes masterbatch by measuring in the back input rotary drum whitewashing coating granulation machine; again with remaining 40% urea by being melt into urine in the melting device; then with spray gun with urine sprinkling pelleting on masterbatch; pass through rotary drum dryer again; pure hot-air dry with 80～100 ℃; through sieving out the qualified particle of diameter 0.85～2.8mm; once wrap up on above-mentioned particle, spraying after the sulphur fusion; with coating machine sustained release dosage B is balancedly filled up particulate slit and parcel again after the cooling, and then coat the cured peplos for the third time that carries out of liquid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100417054A CN1260189C (en) | 2004-08-11 | 2004-08-11 | Slowly controlled releasing sulfur-containing urea and its prepn process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100417054A CN1260189C (en) | 2004-08-11 | 2004-08-11 | Slowly controlled releasing sulfur-containing urea and its prepn process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1609063A CN1609063A (en) | 2005-04-27 |
| CN1260189C true CN1260189C (en) | 2006-06-21 |
Family
ID=34763723
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100417054A Expired - Fee Related CN1260189C (en) | 2004-08-11 | 2004-08-11 | Slowly controlled releasing sulfur-containing urea and its prepn process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1260189C (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007022732A1 (en) * | 2005-08-26 | 2007-03-01 | Nanjing University Of Science And Technology | A composite slow-release coated fertilizer without environmental pollution |
| WO2007025462A1 (en) * | 2005-09-01 | 2007-03-08 | Nanjing University Of Science And Technology | A slow-release fertilizer coated with degradable polymer |
| CN101550343B (en) * | 2008-04-03 | 2011-08-03 | 中国农业科学院农业环境与可持续发展研究所 | Chemical conditioner for improving red soil dry land |
| CN101289350B (en) * | 2008-05-30 | 2012-10-24 | 山东金正大生态工程股份有限公司 | Water soluble alkyd resin-wax composite coating release-controlling fertiliser and method for preparing same |
| CN101289353B (en) * | 2008-05-30 | 2012-10-24 | 山东金正大生态工程股份有限公司 | Alkyd resin emulsion-wax composite coating release-controlling fertiliser and method for preparing same |
| CN101608119B (en) * | 2008-06-18 | 2011-06-29 | 中国农业科学院农业环境与可持续发展研究所 | Biological-chemical conditioning agent for promoting fruit tree growth in red earth area |
| CN101538182B (en) * | 2009-04-15 | 2012-12-12 | 吴成祥 | Functional compound fertilizer, production device and preparation method thereof |
| CN101628838B (en) * | 2009-07-30 | 2012-12-12 | 吴成祥 | Slow-release agent of functional nitrogenous fertilizer |
| CN102140051A (en) * | 2010-11-30 | 2011-08-03 | 浙江大学 | Application of 3, 4-dimethyl pyrazole phosphate urea and usage method thereof |
| CN103254009A (en) * | 2013-05-20 | 2013-08-21 | 深圳市芭田生态工程股份有限公司 | Gamma-polyglutamic acid slow-release preparation, preparation method and application thereof |
-
2004
- 2004-08-11 CN CNB2004100417054A patent/CN1260189C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1609063A (en) | 2005-04-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1247490C (en) | Fertilizer coating composite, its making method and multicomponent coated granular fertilizer | |
| CN101857490B (en) | Slow/controlled-release compound fertilizer suitable for field crops | |
| CN101570455B (en) | Method for preparing particle ammonium sulfate product by organic-inorganic binder | |
| CN108033862B (en) | Preparation method of novel high-strength round granular potassium sulfate | |
| CN1260189C (en) | Slowly controlled releasing sulfur-containing urea and its prepn process | |
| CN1213001C (en) | Method of producing granular composite fertilizer using high tower pellatizer and equipment | |
| CN1850742A (en) | Environment-protection type coated release-controlled urea and preparing method | |
| CN101037365A (en) | Production technique of carbamide microelement fertilizer | |
| CN104109054A (en) | Production process and production device of urea formaldehyde slow-release synergistic fertilizer | |
| CN104909964A (en) | Slow-release fertilizer and application thereof | |
| CN1403423A (en) | Low-tower molten slurry pelletizing method and apparatus to produce granulated multicomponent composite fertilizer | |
| CN1486964A (en) | Coating material and coating method for controllable slow releasing fertilizer | |
| CN101033160A (en) | Environment-friendly type degradable slow release fertilizer envelope agent and preparing method thereof | |
| CN107986887B (en) | Round high-strength granular potassium chloride fertilizer and manufacturing method thereof | |
| CN101045657A (en) | Pollution free organic fertilizer produced by aginomoto waste liquid and preparation method thereof | |
| CN110590438A (en) | High-tower polymorphic nitrogen and potassium topdressing compound fertilizer and preparation method thereof | |
| CN104086338A (en) | Paddy-rice controlled-release fertilizer, and preparation method and application thererof | |
| CN101823920B (en) | Preparation method for sustained-release and controlled release compound fertilizer suitable for field crop | |
| CN101298393A (en) | Potassium sulfate and magnesium sulfate fertilizer production process having extrusion prilling step and no drying step | |
| CN104860779A (en) | Soil improvement type fertilizer and preparation method thereof | |
| CN106747771A (en) | A kind of high-efficient granule ammonium sulfate and preparation method thereof | |
| CN1169758C (en) | Long-acting water-retaining complex fertilizer and its preparation method and special-purpose equipment | |
| CN1325836A (en) | Granular compound fertilizer and its preparing process | |
| CN1298679C (en) | Dry powder type organic compound fertilizer pelletizing adhesive and its preparing method | |
| CN1257135C (en) | Coated fertilizer and its preparation method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060621 Termination date: 20120811 |