CN106747771A - A kind of high-efficient granule ammonium sulfate and preparation method thereof - Google Patents
A kind of high-efficient granule ammonium sulfate and preparation method thereof Download PDFInfo
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- CN106747771A CN106747771A CN201611028278.5A CN201611028278A CN106747771A CN 106747771 A CN106747771 A CN 106747771A CN 201611028278 A CN201611028278 A CN 201611028278A CN 106747771 A CN106747771 A CN 106747771A
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- ammonium sulfate
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- ammonium
- sulfuric acid
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- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 title claims abstract description 64
- 229910052921 ammonium sulfate Inorganic materials 0.000 title claims abstract description 64
- 235000011130 ammonium sulphate Nutrition 0.000 title claims abstract description 64
- 239000008187 granular material Substances 0.000 title claims abstract description 21
- 238000002360 preparation method Methods 0.000 title description 5
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 39
- 238000004519 manufacturing process Methods 0.000 claims abstract description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 19
- 229910052925 anhydrite Inorganic materials 0.000 claims abstract description 17
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 claims abstract description 15
- 238000000034 method Methods 0.000 claims abstract description 14
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000004202 carbamide Substances 0.000 claims abstract description 13
- 239000002245 particle Substances 0.000 claims abstract description 13
- 238000005469 granulation Methods 0.000 claims abstract description 12
- 230000003179 granulation Effects 0.000 claims abstract description 12
- 239000000047 product Substances 0.000 claims abstract description 11
- 239000002253 acid Substances 0.000 claims abstract description 10
- ATRRKUHOCOJYRX-UHFFFAOYSA-N Ammonium bicarbonate Chemical compound [NH4+].OC([O-])=O ATRRKUHOCOJYRX-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229910000013 Ammonium bicarbonate Inorganic materials 0.000 claims abstract description 9
- 235000012538 ammonium bicarbonate Nutrition 0.000 claims abstract description 9
- 239000001099 ammonium carbonate Substances 0.000 claims abstract description 9
- 239000002994 raw material Substances 0.000 claims abstract description 9
- 239000000463 material Substances 0.000 claims description 19
- 239000011230 binding agent Substances 0.000 claims description 18
- 238000001035 drying Methods 0.000 claims description 18
- 239000001166 ammonium sulphate Substances 0.000 claims description 17
- 239000011265 semifinished product Substances 0.000 claims description 12
- 238000001816 cooling Methods 0.000 claims description 7
- 238000007796 conventional method Methods 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 6
- 239000000843 powder Substances 0.000 claims description 6
- 238000012216 screening Methods 0.000 claims description 6
- 239000011505 plaster Substances 0.000 claims description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 abstract description 14
- 229910052717 sulfur Inorganic materials 0.000 abstract description 10
- 239000011593 sulfur Substances 0.000 abstract description 10
- 239000006227 byproduct Substances 0.000 abstract description 7
- 239000002699 waste material Substances 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 238000006243 chemical reaction Methods 0.000 abstract description 2
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 230000006641 stabilisation Effects 0.000 abstract description 2
- 238000011105 stabilization Methods 0.000 abstract description 2
- 239000003337 fertilizer Substances 0.000 description 18
- 238000002156 mixing Methods 0.000 description 6
- 239000005864 Sulphur Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- JBKVHLHDHHXQEQ-UHFFFAOYSA-N epsilon-caprolactam Chemical compound O=C1CCCCCN1 JBKVHLHDHHXQEQ-UHFFFAOYSA-N 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 235000015097 nutrients Nutrition 0.000 description 4
- 238000007873 sieving Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000002689 soil Substances 0.000 description 3
- 241000196324 Embryophyta Species 0.000 description 2
- HIVLDXAAFGCOFU-UHFFFAOYSA-N ammonium hydrosulfide Chemical compound [NH4+].[SH-] HIVLDXAAFGCOFU-UHFFFAOYSA-N 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 2
- 239000004254 Ammonium phosphate Substances 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 239000002202 Polyethylene glycol Substances 0.000 description 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- 240000008042 Zea mays Species 0.000 description 1
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 description 1
- 235000002017 Zea mays subsp mays Nutrition 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 150000001413 amino acids Chemical class 0.000 description 1
- 229910000148 ammonium phosphate Inorganic materials 0.000 description 1
- 235000019289 ammonium phosphates Nutrition 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000007767 bonding agent Substances 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000002361 compost Substances 0.000 description 1
- 235000005822 corn Nutrition 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- MNNHAPBLZZVQHP-UHFFFAOYSA-N diammonium hydrogen phosphate Chemical compound [NH4+].[NH4+].OP([O-])([O-])=O MNNHAPBLZZVQHP-UHFFFAOYSA-N 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000003834 intracellular effect Effects 0.000 description 1
- 239000002686 phosphate fertilizer Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920002401 polyacrylamide Polymers 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 229920006324 polyoxymethylene Polymers 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- WTHDKMILWLGDKL-UHFFFAOYSA-N urea;hydrate Chemical compound O.NC(N)=O WTHDKMILWLGDKL-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05C—NITROGENOUS FERTILISERS
- C05C3/00—Fertilisers containing other salts of ammonia or ammonia itself, e.g. gas liquor
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Fertilizers (AREA)
Abstract
The present invention provides a kind of high-efficient granule ammonium sulfate, and the high-efficient granule ammonium sulfate is prepared from by the raw material of following weight parts：80-90 parts of ammonium sulfate, 1.5-2.5 parts of sulfuric acid, 2-3 parts of urea, ammonium hydrogen carbonate 1.5-2.5,1.5-3 parts of anhydrite, 0.5-1 part of water.The present invention has following beneficial effects：Quality is high, present invention process condition is simple, production process is easily manipulated, the ammonium sulfate indices of production meet the standards of GB535 1995, and balling ratio brings up to 90% by 70%, product particle smooth in appearance, granule strength is more than 25N, between 1.00 4.75mm, sulfur content stabilization is more than 24% for granularity；Low cost; it is Waste Sulfuric Acid because the present invention is raw materials used; the industry byproducts such as by-product anhydrite; raw material is cheap, and low production cost can turn waste into wealth; realize resource reutilization; and make use of the reaction heat of complex acid and the heat of hot returning charge to enter comminutor during granulation, and steam required during granulation is saved, save energy consumption.
Description
Technical field
The present invention relates to a kind of production technology of ammonium sulfate fertilizer, particularly a kind of high-efficient granule ammonium sulfate and its preparation
Method.
Background technology
Sulphur is the indispensable nutrient of growth and development of plants, is the main component of sulfur-containing amino acid and intracellular various
The synthesis material of material, and there is significant effect at aspects such as increasing crop yield, improvement crop qualities.Ammonium sulfate abbreviation sulphur
Ammonium, is commonly called as ammonium sulphate, and powdery sulphur ammonium is the maximum sulfur fertilizer of current usage amount, and its water content is high, and nutrients release is very fast, in China
Have and produce within over one hundred year and apply history, nitrogenous (N) theoretical value 21.2% of ammonium sulfate, sulfur-bearing (S) 24.1% is a kind of nitrogenous, sulphur
The fertilizer of nutrient.Shown according to the Chinese Academy of Agricultural Sciences's data at present, 30% arable land a lack of sulfur is there are about in domestic 29 provinces and cities, and year is exposed
About 2,000,000 tons or so, sulfuric acid content has been in state unable to make ends meet in China's soil.Ammonium sulfate as sulfur fertilizer principal item
One of only up to 1,000,000 tons or so of annual production at present, wherein 90% is used for agricultural, but it is annual be also only capable of providing about 200,000 tons of sulphur,
The deficiency of sulfur fertilizer has caused national great attention, it is desirable to improve utilization rate of fertilizer.And it is short that powdery ammonium sulfate is suitable only for growth period
Crop, and the crop long for growth period, later stage fertilizer efficiency is not enough, and due to applying the aspect such as property, storage characteristics, transportability
It is poor, it is impossible to meet the requirement of mechanization of agriculture fertilising.After ammonium sulfate granulating, physical property changes, nutrient releasing speed
Slow down, extend the effective acting time of fertilizer, and can be blended as Special Fertilizers for Various Crops or with other granular chemical fertilizers after granulating
Fertilizer is used, and has preferable market prospects.
The production method of existing graininess ammonium sulfate according to apply for a patent with periodical report data mainly have following several
(1) extruder grain, is granulated with chilling roller machine to powdery ammonium sulfate.This technique weak point is that particle is non-round to be in the form of a column, and sulfur content is inclined
Low, the production time is more long, and equipment corrosion is more serious.(2) with polyacrylamide, polyethylene glycol or PEF as organic adhesive
Agent, ammonium phosphate produces granular ammonium sulfate as inorganic binder, and complicated and cost is higher because binding agent makes for this method, it is difficult to push away
Extensively.(3) make binding agent with polyformaldehyde solution and produce a shape ammonium sulfate, also because binding agent is expensive, production steam, product
Cost of manufacture is high-leveled and difficult with popularization.(4) crystallisation：Foreign countries disclose a kind of method that crystallisation prepares ammonium sulfate, make production
The by product ammonium sulfate of caprolactam crystallizes granulating in crystallizing tank.This method requirement is only in the base of preparing process of caprolactam
Carried out on plinth, applicability is not strong at home.
The content of the invention
Present invention solves the technical problem that：A kind of granular ammonium sulfate fertilizer that can efficiently produce and its production work are provided
Skill, binding agent is made using industrial by-product Waste Sulfuric Acid and agricultural urea and water mixture, and ammonium hydrogen carbonate and industrial by-product anhydrite are to fill out
Thing is filled to powdery ammonium sulfate coating granulation, and properties of product are good, and presentation quality is poor in solving existing method, and sulfur content is less than
24%, utilization rate is low, the problem of high cost.
The purpose of the present invention is realized by following technical proposals.
A kind of high-efficient granule ammonium sulfate, the ammonium sulphate grain is prepared from by the raw material of following weight parts：
Further, the sulfuric acid is 98% concentrated sulfuric acid.
Further, the anhydrite is the dead plaster that CaSO4 contents are not less than 97%.
A kind of high-efficient granule ammonium sulfate production method, the method includes following four steps：
Step one, the sulfuric acid for being proportionally added into complex acid tank 1.5-2.5 weight portions, the urea of 2-3 weight portions and
The water of 0.5-1 weight point, mixes and is stirred continuously, and maintains the temperature at 70 DEG C-80 DEG C and is made water white transparency liquid as binding agent；
Step 2, the anhydrite powder of the ammonium sulfate of 80-90 weight portions and 1.5-3 weight portions is broken to 100 mesh after, with
The ammonium hydrogen carbonate of 1.5-2.5 weight portions mixes homogenizing in comminutor；
Step 3, the binding agent described in step one is atomized and step 2 gained mixed material table is sprayed in comminutor
Face, mixing granulation maintains prilling temperature at 60 DEG C -65 DEG C, obtains ammonium sulphate grain semi-finished product.
Step 4, ammonium sulphate grain semi-finished product obtained in step 3 are stacked 8-20h at normal temperatures, then by after stacking
In product feeding drying kiln, inlet temperature is 110 DEG C -120 DEG C, and outlet temperature is maintained at 60 DEG C -65 DEG C, and drying time is
10-20min, cooling removes residual moisture；
Step 5, finally use conventional method after the material multi screening after drying to forming ammonium sulfate finished particle.
Under the present invention has relative to the preparation technology of existing high-efficient granule ammonium sulfate, formula design and application etc.
State beneficial effect：
1), quality is high, and present invention process condition is simple, and production process is easily manipulated, the ammonium sulfate indices of production
Meet GB535-1995 standards, and balling ratio brings up to 90% by 70%, product particle smooth in appearance, granule strength is more than
25N, between 1.00-4.75mm, sulfur content stabilization is more than 24% for granularity.
2), low cost, is Waste Sulfuric Acid because the present invention is raw materials used, and the industry byproduct such as by-product anhydrite, raw material is cheap,
Low production cost, can turn waste into wealth, and realize resource reutilization, and make use of the reaction heat of complex acid and the heat of hot returning charge during granulation
Amount enters comminutor, saves steam required during granulation, has saved energy consumption, and increased compost operation can make cold air and make
Grain material contact, to granulation material water removal cooling, makes small particles material diameter quickly increase, and improves granule strength.
3), fertilizer efficiency is good, and the present invention, as a kind of inorganic binder thin-film material, is wrapped in particle using sulfuric acid and urea water
Surface so that ammonium sulfate fertilizer has certain slow releasing function, it is possible to increase utilization rate of fertilizer, through Xi'an Hu County agricultural
Technique Popularizing center field test proves that ammonium sulphate grain fertilizer of the present invention has obvious facilitation to summer corn growth,
Local great drought in 2016, under the conditions of awful weather, robust plant, blade is dark green, with significant production-increasing function, and compares field phase
8.1% is reached than rate of growth.Compared with field of not applying fertilizer, 18.1% is increased, utilization rate of fertilizer improves 8.9%, have received out
The effect in source section " sulphur ".
4), present invention bonding agent raw material used can gather materials on the spot, and the technological process of production is simple, it is easy to promote, for one
As the granular general calcium factory of domestic production, match as long as sulfuric acid will be equipped with complex acid program and make sulfuric acid and urea into, do not go up again
New equipment, later granulating working procedure is convenient to realize and existing equipment production technology grafting completely as production granulated phosphate fertilizer.
Specific embodiment
High-efficient granule ammonium sulfate of the invention and preparation method thereof is described in detail below by embodiment.
A kind of high-efficient granule ammonium sulfate, the ammonium sulphate grain is prepared from by the raw material of following weight parts：Ammonium sulfate 80-
90 parts, 1.5-2.5 parts of sulfuric acid, 2-3 parts of urea, 1.5-2.5 parts of ammonium hydrogen carbonate, 1.5-3 parts of anhydrite, 0.5-1 part of water.
The sulfuric acid is 98% concentrated sulfuric acid.The anhydrite is CaSO4Content is not less than 97% dead plaster.
A kind of high-efficient granule ammonium sulfate production method, the method includes following four steps：
Step one, the sulfuric acid for being proportionally added into complex acid tank 1.5-2.5 weight portions, the urea of 2-3 weight portions and
The water of 0.5-1 weight point, mixes and is stirred continuously, and maintains the temperature at 70 DEG C-80 DEG C and is made water white transparency liquid as binding agent；
Wherein temperature control is most important, temperature drift, is also easy to produce excessive bubble so that the N volatilizations in urea, temperature is too low, urea
Dissolving is slow, and part urea granules can not be completely dissolved, the spray effect when influence later stage granulates, and control mixing temperature is 70
DEG C -80 DEG C can ensure stable operation.
Step 2, the anhydrite powder of the ammonium sulfate of 80-90 weight portions and 1.5-3 weight portions is broken to 100 mesh sieving after,
Mix homogenizing in comminutor with the ammonium hydrogen carbonate of 1.5-2.5 weight portions, it is fully dispersed to lump；
Step 3, the binding agent described in step one is atomized and step 2 gained mixed material table is sprayed in comminutor
Face, mixing granulation maintains prilling temperature at 60 DEG C -65 DEG C, obtains ammonium sulphate grain semi-finished product, and balling ratio is up to 87%；
Step 4, ammonium sulphate grain semi-finished product obtained in step 3 are stacked 8-20h at normal temperatures, then by after stacking
In product feeding drying kiln, inlet temperature is 110 DEG C -120 DEG C, and outlet temperature is maintained at 60 DEG C -65 DEG C, and drying time is
10-20min, cooling removes residual moisture；
Step 5, finally use conventional method after the material multi screening after drying to forming ammonium sulfate finished particle.
Final obtained ammonium sulfate finished particle is more than 20.6% through inspection containing N, and 24.07% is more than containing S, and granularity is in 2mm
Particle to 3mm accounts for 98%, and granule strength 30N, water content is less than 0.4%, and free acid content is less than 0.12%, product meta-acid
Property, can more be adapted to different soils and crop, it is very beneficial for the improvement of saline soil, improve crop yield.
The present invention is further illustrated below by specific embodiment.
Embodiment 1
Step one, sulfuric acid, the urea of 2 weight portions and 0.5 weight point that are proportionally added into complex acid tank 1.5 weight portions
Water, mix and be stirred continuously, maintain the temperature at 70 DEG C and be made water white transparency liquid as binding agent；
Step 2, the anhydrite powder of the ammonium sulfate of 81 weight portions and 1.5 weight portions is broken to 100 mesh sieving after, with 1.5 weights
The ammonium hydrogen carbonate for measuring part mixes homogenizing in comminutor, fully dispersed to lump；
Step 3, the binding agent described in step one is atomized and step 2 gained mixed material table is sprayed in comminutor
Face, mixing granulation maintains prilling temperature at 60 DEG C, obtains ammonium sulphate grain semi-finished product,
Step 4, ammonium sulphate grain semi-finished product obtained in step 3 are stacked 8h at normal temperatures, then by the product after stacking
In feeding drying kiln, inlet temperature is 110 DEG C, and outlet temperature is maintained at 60 DEG C, and drying time is 10, and cooling removes residual water
Point；
Step 5, finally use conventional method after the material multi screening after drying to forming ammonium sulfate finished particle.
Embodiment 2
Step one, the sulfuric acid, the urea of 1.6 weight portions and 0.7 weight that are proportionally added into complex acid tank 1.95 weight portions
The water of amount point, mixes and is stirred continuously, and maintains the temperature at 85 DEG C and is made water white transparency liquid as binding agent；
Step 2, the anhydrite powder of the ammonium sulfate of 86 weight portions and 2 weight portions is broken to 100 mesh sieving after, with 2 weight portions
Ammonium hydrogen carbonate mix homogenizing in comminutor, it is fully dispersed to lump；
Step 3, the binding agent described in step one is atomized and step 2 gained mixed material table is sprayed in comminutor
Face, mixing granulation maintains prilling temperature at 63 DEG C, obtains ammonium sulphate grain semi-finished product；
Step 4, ammonium sulphate grain semi-finished product obtained in step 3 are stacked 15h at normal temperatures, then by the product after stacking
In feeding drying kiln, inlet temperature is 115 DEG C, and outlet temperature is maintained at 62 DEG C, and drying time is 15min, and cooling removes remaining
Moisture；
Step 5, finally use conventional method after the material multi screening after drying to forming ammonium sulfate finished particle.
Embodiment 3
Step one, sulfuric acid, the urea of 3 weight portions and 1 weight point that are proportionally added into complex acid tank 2.5 weight portions
Water, mixes and is stirred continuously, and maintains the temperature at 80 DEG C and is made water white transparency liquid as binding agent；
Step 2, the anhydrite powder of the ammonium sulfate of 90 weight portions and 3 weight portions is broken to 100 mesh sieving after, with 2.5 weight
The ammonium hydrogen carbonate of part mixes homogenizing in comminutor, fully dispersed to lump；
Step 3, the binding agent described in step one is atomized and step 2 gained mixed material table is sprayed in comminutor
Face, mixing granulation maintains prilling temperature at 65 DEG C, obtains ammonium sulphate grain semi-finished product；
Step 4, ammonium sulphate grain semi-finished product obtained in step 3 are stacked 20h at normal temperatures, then by the product after stacking
In feeding drying kiln, inlet temperature is 120 DEG C, and outlet temperature is maintained at 65 DEG C, and drying time is 20min, and cooling removes remaining
Moisture；
Step 5, finally use conventional method after the material multi screening after drying to forming ammonium sulfate finished particle.
Claims (4)
1. a kind of high-efficient granule ammonium sulfate, it is characterised in that the ammonium sulphate grain is prepared from by the raw material of following weight parts：
2. high-efficient granule ammonium sulfate according to claim 1, it is characterised in that the sulfuric acid is 98% concentrated sulfuric acid.
3. high-efficient granule ammonium sulfate according to claim 1, it is characterised in that the anhydrite is CaSO4Content is not less than
97% dead plaster.
4. a kind of high-efficient granule ammonium sulfate production method based on described in claim 1, it is characterised in that the method includes following
Five steps：
Step one, the sulfuric acid for being proportionally added into complex acid tank 1.5-2.5 weight portions, the urea of 2-3 weight portions and 0.5-
The water of 1 weight point, mixes and is stirred continuously, and maintains the temperature at 70 DEG C -80 DEG C and is made water white transparency liquid as binding agent；
Step 2, the anhydrite powder of the ammonium sulfate of 80-90 weight portions and 1.5-3 weight portions is broken to 100 mesh after, with 1.5-
The ammonium hydrogen carbonate of 2.5 weight portions mixes homogenizing in comminutor；
Step 3, the binding agent described in step one is atomized and step 2 gained mixed material surface is sprayed in comminutor, mixed
Granulation is closed, maintains prilling temperature at 60 DEG C -65 DEG C, obtain ammonium sulphate grain semi-finished product；
Step 4, ammonium sulphate grain semi-finished product obtained in step 3 are stacked 8-20h at normal temperatures, then by the product after stacking
In feeding drying kiln, inlet temperature is 110 DEG C-120 DEG C, and outlet temperature is maintained at 60 DEG C-65 DEG C, drying time is 10-
20min, cooling removes residual moisture；
Step 5, finally use conventional method after the material multi screening after drying to forming ammonium sulfate finished particle.
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| US11040920B2 (en) | 2017-12-15 | 2021-06-22 | Innovations For World Nutrition Llc | Fertilizer and plant growth promoter to increase plant yield and method of increasing plant yield |
| US11192830B2 (en) | 2020-04-15 | 2021-12-07 | Innovations for World Nutrition, LLC | Seed coating to promote plant growth and method of increasing plant yield |
| US11358909B2 (en) | 2020-04-15 | 2022-06-14 | Innovations for World Nutrition, LLC | Fertilizer containing a seed grind and a method of using the fertilizer to enhance plant growth |
| US11634366B2 (en) | 2020-04-15 | 2023-04-25 | Innovations for World Nutrition, LLC | Plant growth enhancer using carbon dioxide to increase plant yield and method of increasing plant yield |
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| US11192830B2 (en) | 2020-04-15 | 2021-12-07 | Innovations for World Nutrition, LLC | Seed coating to promote plant growth and method of increasing plant yield |
| US11358909B2 (en) | 2020-04-15 | 2022-06-14 | Innovations for World Nutrition, LLC | Fertilizer containing a seed grind and a method of using the fertilizer to enhance plant growth |
| US11634366B2 (en) | 2020-04-15 | 2023-04-25 | Innovations for World Nutrition, LLC | Plant growth enhancer using carbon dioxide to increase plant yield and method of increasing plant yield |
| US11787749B2 (en) | 2020-04-15 | 2023-10-17 | Innovations for World Nutrition, LLC | Fertilizer and plant growth promoter to increase plant yield and method of increasing plant yield |
| US12017964B2 (en) | 2020-04-15 | 2024-06-25 | Innovations for World Nutrition, LLC | Plant growth enhancer using carbon dioxide to increase plant yield |
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Application publication date: 20170531 |