CN102320876B - Tower granulation slow release long-acting nitrogen phosphorus potassium compound fertilizer and preparation method thereof - Google Patents
Tower granulation slow release long-acting nitrogen phosphorus potassium compound fertilizer and preparation method thereof Download PDFInfo
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- CN102320876B CN102320876B CN2011102587755A CN201110258775A CN102320876B CN 102320876 B CN102320876 B CN 102320876B CN 2011102587755 A CN2011102587755 A CN 2011102587755A CN 201110258775 A CN201110258775 A CN 201110258775A CN 102320876 B CN102320876 B CN 102320876B
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- 239000003337 fertilizer Substances 0.000 title claims abstract description 94
- 238000005469 granulation Methods 0.000 title claims abstract description 66
- 230000003179 granulation Effects 0.000 title claims abstract description 66
- 238000002360 preparation method Methods 0.000 title claims abstract description 30
- WZLMXYBCAZZIRQ-UHFFFAOYSA-N [N].[P].[K] Chemical compound [N].[P].[K] WZLMXYBCAZZIRQ-UHFFFAOYSA-N 0.000 title claims abstract description 24
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims abstract description 58
- 239000004202 carbamide Substances 0.000 claims abstract description 58
- 150000001875 compounds Chemical class 0.000 claims abstract description 44
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical class O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims abstract description 29
- 239000000843 powder Substances 0.000 claims abstract description 28
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 claims abstract description 19
- 239000002994 raw material Substances 0.000 claims abstract description 17
- LFVGISIMTYGQHF-UHFFFAOYSA-N ammonium dihydrogen phosphate Chemical compound [NH4+].OP(O)([O-])=O LFVGISIMTYGQHF-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229910000387 ammonium dihydrogen phosphate Inorganic materials 0.000 claims abstract description 16
- 235000019837 monoammonium phosphate Nutrition 0.000 claims abstract description 16
- 239000006012 monoammonium phosphate Substances 0.000 claims abstract description 16
- 238000000034 method Methods 0.000 claims abstract description 15
- 239000008187 granular material Substances 0.000 claims abstract description 14
- 239000011248 coating agent Substances 0.000 claims abstract description 13
- 238000000576 coating method Methods 0.000 claims abstract description 13
- 229910021536 Zeolite Inorganic materials 0.000 claims abstract description 9
- 239000010457 zeolite Substances 0.000 claims abstract description 9
- 239000002245 particle Substances 0.000 claims description 34
- 239000012188 paraffin wax Substances 0.000 claims description 24
- 238000012216 screening Methods 0.000 claims description 12
- 238000005496 tempering Methods 0.000 claims description 12
- 230000005496 eutectics Effects 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 8
- 235000007164 Oryza sativa Nutrition 0.000 claims description 7
- 238000002156 mixing Methods 0.000 claims description 7
- 235000009566 rice Nutrition 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 5
- 241000209140 Triticum Species 0.000 claims description 4
- 235000021307 Triticum Nutrition 0.000 claims description 4
- 240000008042 Zea mays Species 0.000 claims description 4
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 claims description 4
- 235000002017 Zea mays subsp mays Nutrition 0.000 claims description 4
- 235000005822 corn Nutrition 0.000 claims description 4
- 230000004927 fusion Effects 0.000 claims description 4
- 238000002844 melting Methods 0.000 claims description 4
- 230000008018 melting Effects 0.000 claims description 4
- 229910052757 nitrogen Inorganic materials 0.000 claims description 4
- 235000013311 vegetables Nutrition 0.000 claims description 4
- 238000003556 assay Methods 0.000 claims description 3
- 238000013467 fragmentation Methods 0.000 claims description 3
- 238000006062 fragmentation reaction Methods 0.000 claims description 3
- 238000012856 packing Methods 0.000 claims description 3
- 239000002002 slurry Substances 0.000 claims description 3
- 240000007594 Oryza sativa Species 0.000 claims 1
- OHJMTUPIZMNBFR-UHFFFAOYSA-N biuret Chemical compound NC(=O)NC(N)=O OHJMTUPIZMNBFR-UHFFFAOYSA-N 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 10
- 235000015097 nutrients Nutrition 0.000 abstract description 5
- 230000007613 environmental effect Effects 0.000 abstract 1
- 235000011164 potassium chloride Nutrition 0.000 abstract 1
- 239000001103 potassium chloride Substances 0.000 abstract 1
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 description 7
- 241000209094 Oryza Species 0.000 description 6
- 239000002689 soil Substances 0.000 description 6
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 4
- 239000005864 Sulphur Substances 0.000 description 4
- 238000013270 controlled release Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000012298 atmosphere Substances 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 231100000572 poisoning Toxicity 0.000 description 3
- 230000000607 poisoning effect Effects 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000011268 mixed slurry Substances 0.000 description 2
- 238000013268 sustained release Methods 0.000 description 2
- 239000012730 sustained-release form Substances 0.000 description 2
- 210000002700 urine Anatomy 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 1
- 241000282326 Felis catus Species 0.000 description 1
- PFRUBEOIWWEFOL-UHFFFAOYSA-N [N].[S] Chemical compound [N].[S] PFRUBEOIWWEFOL-UHFFFAOYSA-N 0.000 description 1
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 description 1
- 229910052921 ammonium sulfate Inorganic materials 0.000 description 1
- 235000011130 ammonium sulphate Nutrition 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 210000003608 fece Anatomy 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 239000010871 livestock manure Substances 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000003900 soil pollution Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
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Abstract
The invention discloses a tower granulation slow release long-acting nitrogen phosphorus potassium compound fertilizer and a preparation method thereof, and belongs to compound fertilizers. The preparation method comprises the following steps of: preparing tower granulation urea-based compound fertilizer granules by using a tower granulation device; and then performing wax primary coating and modified zeolite powder surface secondary coating on the urea-based compound fertilizer granules to prepare tower granulation urea-based compound fertilizer granules, wherein the tower granulation urea-based compound fertilizer granules consist of the following raw materials in parts by weight: 33-50 parts of urea, 10-26 parts of monoammonium phosphate and 30-41 parts of potassium chloride; the amount of used wax is 0.5-1.0 percent of the mass of the tower granulation urea-based compound fertilizer granules; and the modified zeolite powder consists of the following raw materials in percentage by weight: 1-5 percent of zinc stearate and 95-99 percent of zeolite powder. The tower granulation slow release long-acting nitrogen phosphorus potassium compound fertilizer which has the advantages of good slow release effect, high fertilizer nutrient utilization rate, simple process, low cost and contribution to environmental protection in use with the tower granulation device and the preparation method thereof are provided.
Description
Technical field
The present invention is a kind of tower granulation slow release long-acting nitrogen phosphorus potassium compound fertilizer and preparation method thereof.Belong to mixed fertilizer.
Background technology
Traditional NpK complex fertilizer plant recovery of nutrient only is 25%-35%, and wherein the N fertilizer utilization rate less than 30%, loses especially severe, and causes the pollution of soil pollution, atmospheric environment.
Chinese patent CN 200510102650.8 discloses a kind of melt slime granulating composite fertilizer and manufacture method thereof, one of technical problem that solves is that traditional prilling process composite fertilizer's structure of producing is more loose, the fertilizer dissolving discharges very fast, fertilizer efficiency is decomposed loss piece, the problem that utilization rate of fertilizer is lower.The technical scheme that adopts is that manufacturing processed adopts high-temperature fusion urea to do carrier, raw material is merged evenly, through cat head spraying cooling granulating.Obtained preferably technique effect.But adopt that above-mentioned preparation method produces compound fertilizer production with tower granulation material product, slow release effect is still not good enough.
Coating controlled-release fertilizer of the prior art, endoplasm type Controlled Release Fertilizer, stable Controlled Release Fertilizer, biological inhibition formulation Controlled Release Fertilizer, its coated slow-release material adopts sulphur or synthetic resins more, and wherein the sulphur film is easily broken, and the crops such as paddy rice class are easily produced the murder by poisoning side effect.Coated with resin is expensive and be difficult in degraded in soil.
At present, tower granulation slow release long-acting nitrogen phosphorus potassium compound fertilizer is also not yet seen reported in literature.
Summary of the invention
The object of the invention is to avoid above-mentioned weak point of the prior art; and the had good sustained release effect that provides a kind of and high tower prilling matched with devices to use; the fertilizer nutrient utilization ratio is high; technique is simple; cost is lower, is of value to long-acting NpK complex fertilizer of high-tower slow-release of soil and atmosphere and water body environment protection and preparation method thereof.
Purpose of the present invention can reach by following measure:
Tower granulation slow release long-acting nitrogen phosphorus potassium compound fertilizer of the present invention and preparation method thereof; it is characterized in that at first preparing the high-tower granulation urea-based compound fertilizer particle through the high tower prilling device; then the urea-based compound fertilizer particle is carried out paraffin and once coat to coat with the modified zeolite powder surface second and make, wherein:
Described high-tower granulation urea-based compound fertilizer particle is comprised of following raw material in parts by weight:
Urea 33～50
Monoammonium phosphate 10～26
Repone K 30～41
Described paraffin once coats, and the consumption of paraffin is 0.5%～1.0% of high tower compound fertilizer quality,
Described modified zeolite powder is comprised of following raw material by weight percentage:
Zinic stearas 1～5
Zeolite powder 95～99
Its preparation method comprises the steps:
The preparation of step 1. high-tower granulation urea-based compound fertilizer particle
A. urea melting
To drop in the fusion tank according to the urea of drafting the prescription accurate-metering, and be heated to 125 ℃～138 ℃, standby one-level is mixed;
B. monoammonium phosphate, Repone K preheating
To drop in the one-level tempering tank according to the monoammonium phosphate of drafting the prescription accurate-metering, Repone K, be preheated to 40 ℃～60 ℃, for subsequent use;
C. eutectic preparation
The fusing urea for preparing in a step is sent into the one-level tempering tank, after mixing with monoammonium phosphate, the Repone K of preheating in the b step, drop in the secondary tempering tank, further mix, slip mixing time＜4min forms the eutectic with certain fluidity energy, and slurry temperature is controlled at 110 ℃-120 ℃, standby granulation is used;
D. sprinkling pelleting
With the eutectic for preparing among the step c, by the granulation of high tower prilling system, be cooled under the tower granule materials temperature＜65 ℃,
Rotary drum cooling temperature＜40 ℃ make the high-tower granulation urea-based compound fertilizer particle, standby screening;
E. screening
The high-tower granulation urea-based compound fertilizer particle of steps d preparation after screening, must meet the high-tower granulation urea-based compound fertilizer particle of product requirement granularity, standby once coating, and screenings returns the one-level tempering tank after fragmentation;
Step 2. paraffin once coats
The high-tower granulation urea-based compound fertilizer particle that makes in the step 1 enters coating machine, with melt paraffin the fertiliser granulates surface is coated;
Step 3. modified zeolite powder secondary coats
Through the fertiliser granulates that step 2 once coats, enter in the coating machine, coat with the modified zeolite powder secondary; After the assay was approved, metering, packing namely get tower granulation slow release long-acting nitrogen phosphorus potassium compound fertilizer of the present invention.
The present invention at first prepares the high-tower granulation urea-based compound fertilizer particle through the high tower prilling device, then the urea-based compound fertilizer particle is carried out paraffin and once coats to coat with the modified zeolite powder surface second and make.It mainly is the characteristic that can form the suspended solid mixed slurry with the good eutectic of flowing property after utilizing urea melting liquid and calcium sulfate, ammonium sulfate mixing, and pass through prilling spry, mixed slurry is sprayed in the prilling tower, make it in the process of gravity landing, carry out heat exchange with the airflow that rises, cooling curing forms particle, obtains Nutrient distribution uniformly with the high nitrogen sulfur base compound manure of Pinhole-shaped.The high tower prilling technology has been simplified the granulation production technique, saves energy consumption for drying, and particle is mellow and full, prevented from caking, and production technique is easy, and useful environment protection can access Nutrient distribution uniformly with high nitrogen, the high-concentration compound fertilizer material of Pinhole-shaped.
Then the urea-based compound fertilizer particle being carried out paraffin once coats with the modified zeolite powder surface second and coats.Avoided the sulphur film easily broken, and the crops such as paddy rice class have easily been produced the murder by poisoning side effect.Coated with resin is expensive and be difficult for drawback in degraded in soil.
The present invention adopts the urine base high tower compound fertilizer material take urea as nitrogenous source; carrying out paraffin once coats with modified zeolite powder surface second cladding process simple; cost is lower; be of value to the protection of soil and atmosphere and water body environment, the tower granulation slow release long-acting nitrogen phosphorus potassium compound fertilizer slow release effect of preparation is remarkable.
Purpose of the present invention can also reach by following measure:
Tower granulation slow release long-acting nitrogen phosphorus potassium compound fertilizer of the present invention and preparation method thereof, described raw material technical indicator is as follows:
Urea; Particle diameter is less than 2MM, and liquid two urea content are less than 1.5%, and nitrogen content is greater than 46%
Repone K: particle powdery 40-60 order, K2O content is greater than 50%, and specification of quality reaches agricultural requirement
Tower granulation slow release long-acting nitrogen phosphorus potassium compound fertilizer of the present invention and preparation method thereof, described high-tower granulation urea-based compound fertilizer particle is comprised of following raw material in parts by weight:
Urea 37～48
Monoammonium phosphate 15～25
Repone K 32～38
Described paraffin once coats, and the consumption of paraffin is 0.6%～0.8% of high-tower granulation urea-based compound fertilizer granular mass,
Described modified zeolite powder is comprised of following raw material by weight percentage:
Zinic stearas 3-5
Zeolite powder 95～97.
It is preferred technical scheme.
Tower granulation slow release long-acting nitrogen phosphorus potassium compound fertilizer of the present invention and preparation method thereof, described high-tower granulation urea-based compound fertilizer particle is comprised of following raw material in parts by weight:
Urea 40
Monoammonium phosphate 25
Repone K 35
Described paraffin once coats, and the consumption of paraffin is 0.8% of high-tower granulation urea-based compound fertilizer granular mass,
Described modified zeolite powder is comprised of following raw material by weight percentage:
Zinic stearas 5
Zeolite powder 95.
It is optimum technical scheme.
The application of tower granulation slow release long-acting nitrogen phosphorus potassium compound fertilizer of the present invention; it is characterized in that being applicable to wheat; corn; rice field crop and vegetables are used; the average utilization rate of fertilizer 10.5%-18.7% that improves; farm crop are on average improved output 5.3%-14.9%, on average improve output 11%-31.2% for greengrocery.
The disclosed technical scheme of tower granulation slow release long-acting nitrogen phosphorus potassium compound fertilizer of the present invention and preparation method thereof has following positively effect compared to existing technology:
1. a kind of had good sustained release effect of using with the high tower prilling matched with devices is provided, and the fertilizer nutrient utilization ratio is high, and technique is simple, and cost is lower, is of value to long-acting NpK complex fertilizer of high-tower slow-release of soil and atmosphere and water body environment protection and preparation method thereof.
2. the high tower prilling technology has been simplified the granulation production technique, saves energy consumption for drying, and particle is mellow and full, prevented from caking, and production technique is easy, and useful environment protection can access Nutrient distribution uniformly with high nitrogen, the high-concentration compound fertilizer material of Pinhole-shaped.
3. paraffin, modified zeolite secondary coat, and have avoided the sulphur film easily broken, and the crops such as paddy rice class are easily produced the murder by poisoning side effect.Coated with resin is expensive and be difficult for drawback in degraded in soil.
4. tower granulation slow release long-acting nitrogen phosphorus potassium compound fertilizer of the present invention is applicable to wheat; corn, rice field crop and vegetables are used, and on average improve utilization rate of fertilizer 10.5%-18.7%; farm crop are on average improved output 5.3%-14.9%, on average improve output 11%-31.2% for greengrocery.
Description of drawings
Fig. 1 is tower granulation slow release long-acting nitrogen phosphorus potassium compound fertilizer preparation method's of the present invention process flow diagram.
Embodiment
The present invention will now be further detailed embodiment:
Embodiment 1 prepares tower granulation slow release long-acting nitrogen phosphorus potassium compound fertilizer of the present invention in accordance with the following steps
The preparation of step 1. high-tower granulation urea-based compound fertilizer particle
A. urea melting
Accurately take by weighing urea 40 weight parts and drop in the fusion tank, be heated to 125 ℃～138 ℃, standby one-level is mixed;
B. monoammonium phosphate, Repone K preheating
Accurately take by weighing monoammonium phosphate 25 weight parts, Repone K 35 weight parts drop in the one-level tempering tank, are preheated to 40 ℃～60 ℃, and are for subsequent use;
C. eutectic preparation
The fusing urea for preparing in a step is sent into the one-level tempering tank, after mixing with monoammonium phosphate, the Repone K of preheating in the b step, drop in the secondary tempering tank, further mix, slip mixing time＜4min forms the eutectic with certain fluidity energy, and slurry temperature is controlled at 110 ℃-120 ℃, standby granulation is used;
D. sprinkling pelleting
With the eutectic for preparing among the step c, by the granulation of high tower prilling system, be cooled under the tower granule materials temperature＜65 ℃,
Rotary drum cooling temperature＜40 ℃ make the high-tower granulation urea-based compound fertilizer particle, standby screening;
E. screening
The high-tower granulation urea-based compound fertilizer particle of steps d preparation after screening, must meet the urine base high tower compound fertilizer material particle of product requirement granularity, standby once coating, and screenings returns the one-level tempering tank after fragmentation;
Step 2. paraffin once coats
The high-tower granulation urea-based compound fertilizer particle that makes in the step 1 enters coating machine, with melt paraffin the fertiliser granulates surface is coated, and the coating consumption of paraffin is 0.8% of high-tower granulation urea-based compound fertilizer granular mass to be covered;
Step 3. modified zeolite powder secondary coats
Through the fertiliser granulates that step 2 once coats, enter in the coating machine, coat with the modified zeolite powder secondary, described modified zeolite powder consists of Zinic stearas 5% zeolite powder 95% by the raw material of following mass fraction.
After the assay was approved, metering, packing namely get tower granulation slow release long-acting nitrogen phosphorus potassium compound fertilizer of the present invention.
Embodiment 2～embodiment 7
According to method and the step of embodiment 1, according to the prescription of table 1, prepare tower granulation slow release long-acting nitrogen phosphorus potassium compound fertilizer of the present invention
Table 1
| Raw material | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 | Embodiment 6 | Embodiment 7 |
| Urea | 30 | 48 | 36 | 40 | 46 | 50 |
| Monoammonium phosphate | 26 | 20 | 24 | 25 | 24 | 10 |
| Repone K | 41 | 32 | 40 | 35 | 30 | 40 |
| Paraffin | 0.5 | 0.6 | 0.8 | 0.7 | 0.9 | 1.0 |
| Zinic stearas | 1 | 2 | 3 | 4 | 2 | 5 |
| Zeolite powder | 99 | 98 | 97 | 96 | 98 | 95 |
The tower granulation slow release long-acting nitrogen phosphorus potassium compound fertilizer that embodiment 1～embodiment 7 makes all is applicable to wheat; corn; rice field crop and vegetables are used; the average utilization rate of fertilizer 10.5%-18.7% that improves; farm crop are on average improved output 5.3%-14.9%, on average improve output 11%-31.2% for greengrocery.
Claims (3)
1. the preparation method of a tower granulation slow release long-acting nitrogen phosphorus potassium compound fertilizer; it is characterized in that at first preparing the high-tower granulation urea-based compound fertilizer particle through the high tower prilling device; then the urea-based compound fertilizer particle is carried out paraffin and once coat to coat with the modified zeolite powder surface second and make, wherein:
Described high-tower granulation urea-based compound fertilizer particle is comprised of following raw material in parts by weight:
Urea 37～48
Monoammonium phosphate 15～25
Repone K 32～38
Described raw material technical indicator is as follows:
Urea; Particle diameter is less than 2MM, and Biuret Content is less than 1.5%, and nitrogen content is greater than 46%
Repone K: particle powdery 40-60 order, K
2O content is greater than 50%, and specification of quality reaches agricultural requirement
Zeolite powder: granularity 60-100 order;
Described paraffin once coats, and the consumption of paraffin is 0.5%～1.0% of high-tower granulation urea-based compound fertilizer granular mass,
Described modified zeolite powder is comprised of following raw material by weight percentage:
Zinic stearas 3-5
Zeolite powder 95～97;
Its preparation method comprises the steps:
The preparation of step 1. high-tower granulation urea-based compound fertilizer particle
A. urea melting
To drop in the fusion tank according to the urea of prescription accurate-metering, be heated to 125 ℃～138 ℃, mix as one-level;
B. monoammonium phosphate, Repone K preheating
To drop in the one-level tempering tank according to the monoammonium phosphate of drafting the prescription accurate-metering, Repone K, be preheated to 40 ℃～60 ℃, for subsequent use;
C. eutectic preparation
The fusing urea for preparing in a step is sent into the one-level tempering tank, after mixing with monoammonium phosphate, the Repone K of preheating in the b step, drop in the secondary tempering tank, further mix, slip mixing time＜4min forms the eutectic with certain fluidity energy, and slurry temperature is controlled at 110 ℃-120 ℃, standby granulation is used;
D. sprinkling pelleting
With the eutectic for preparing among the step c, by the granulation of high tower prilling system, be cooled under the tower granule materials temperature＜65 ℃,
Rotary drum cooling temperature＜40 ℃ make the high-tower granulation urea-based compound fertilizer particle, standby screening;
E. screening
The high-tower granulation urea-based compound fertilizer particle of steps d preparation after screening, must meet the high-tower granulation urea-based compound fertilizer particle of product requirement granularity, standby once coating, and screenings returns the one-level tempering tank after fragmentation;
Step 2. paraffin once coats
The high-tower granulation urea-based compound fertilizer particle that makes in the step 1 enters coating machine, with melt paraffin the fertiliser granulates surface is coated;
Step 3. modified zeolite powder secondary coats
Through the fertiliser granulates that step 2 once coats, enter in the coating machine, coat with the modified zeolite powder secondary; After the assay was approved, metering, packing namely get tower granulation slow release long-acting nitrogen phosphorus potassium compound fertilizer of the present invention.
2. according to claim 1 the preparation method of tower granulation slow release long-acting nitrogen phosphorus potassium compound fertilizer is characterized in that described high-tower granulation urea-based compound fertilizer particle is comprised of following raw material in parts by weight:
Urea 40
Monoammonium phosphate 25
Repone K 35
Described paraffin once coats, and the consumption of paraffin is 0.8% of high-tower granulation urea-based compound fertilizer granular mass,
Described modified zeolite powder is comprised of following raw material by weight percentage:
Zinic stearas 5
Zeolite powder 95.
3. according to the application of the tower granulation slow release long-acting nitrogen phosphorus potassium compound fertilizer of the method for claim 1 preparation; it is characterized in that being applicable to wheat; corn; rice field crop and vegetables are used; the average utilization rate of fertilizer 10.5%-18.7% that improves; farm crop are on average improved output 5.3%-14.9%, on average improve output 11%-31.2% for greengrocery.
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| CN106008003A (en) * | 2016-05-31 | 2016-10-12 | 史丹利化肥扶余有限公司 | High tower granulation produced high concentration compound fertilizer and production method thereof |
| CN108329181A (en) * | 2018-03-20 | 2018-07-27 | 中国水稻研究所 | A kind of preparation method of slow-release nitrogen fertilizer |
| CN108774015B (en) * | 2018-06-12 | 2021-04-02 | 金华市欣生沸石开发有限公司 | Preparation method of zeolite-based hydration heat slow-release material |
| CN110304959A (en) * | 2019-06-18 | 2019-10-08 | 福建奥利高塔复合肥有限公司 | A kind of preparation process of energy conservation and environmental protection high-tower granulation slow release long-acting compound fertilizer |
| CN110256143A (en) * | 2019-06-18 | 2019-09-20 | 福建奥利高塔复合肥有限公司 | A kind of preparation process of novel compound fertilizer production with tower granulation |
| TR201921186A2 (en) * | 2019-12-23 | 2021-07-26 | Tuerkiye Bilimsel Ve Teknolojik Arastirma Kurumu Tuebitak | Carrier element and carrier element modification method for wastewater treatment |
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|---|---|---|---|---|
| CN1546441A (en) * | 2003-12-16 | 2004-11-17 | 高建华 | Melt slurry tower type composite granulating fertilizer and its making process |
| CN1762923A (en) * | 2005-09-13 | 2006-04-26 | 临沂市史丹利化肥有限公司 | Melt slime granulating composite fertilizer and its production method |
| CN101348395A (en) * | 2007-08-15 | 2009-01-21 | 山东金正大生态工程股份有限公司 | Aqueous polymer-olefin dual-layer coated controlled release fertilizer and preparation thereof |
| CN101709017A (en) * | 2009-11-17 | 2010-05-19 | 安徽省农业科学院土壤肥料研究所 | Method for preparing zeolite coated urea |
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2011
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1546441A (en) * | 2003-12-16 | 2004-11-17 | 高建华 | Melt slurry tower type composite granulating fertilizer and its making process |
| CN1762923A (en) * | 2005-09-13 | 2006-04-26 | 临沂市史丹利化肥有限公司 | Melt slime granulating composite fertilizer and its production method |
| CN101348395A (en) * | 2007-08-15 | 2009-01-21 | 山东金正大生态工程股份有限公司 | Aqueous polymer-olefin dual-layer coated controlled release fertilizer and preparation thereof |
| CN101709017A (en) * | 2009-11-17 | 2010-05-19 | 安徽省农业科学院土壤肥料研究所 | Method for preparing zeolite coated urea |
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