CN108218513A - A kind of preparation method of the granular nitro high-nitrogen compound fertilizer with high storage stability - Google Patents
A kind of preparation method of the granular nitro high-nitrogen compound fertilizer with high storage stability Download PDFInfo
- Publication number
- CN108218513A CN108218513A CN201810226423.3A CN201810226423A CN108218513A CN 108218513 A CN108218513 A CN 108218513A CN 201810226423 A CN201810226423 A CN 201810226423A CN 108218513 A CN108218513 A CN 108218513A
- Authority
- CN
- China
- Prior art keywords
- fertilizer
- nitrogen
- preparation
- phosphorus
- storage stability
- 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.)
- Granted
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G5/00—Fertilisers characterised by their form
- C05G5/10—Solid or semi-solid fertilisers, e.g. powders
- C05G5/12—Granules or flakes
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05B—PHOSPHATIC FERTILISERS
- C05B11/00—Fertilisers produced by wet-treating or leaching raw materials either with acids in such amounts and concentrations as to yield solutions followed by neutralisation, or with alkaline lyes
- C05B11/04—Fertilisers produced by wet-treating or leaching raw materials either with acids in such amounts and concentrations as to yield solutions followed by neutralisation, or with alkaline lyes using mineral acid
- C05B11/06—Fertilisers produced by wet-treating or leaching raw materials either with acids in such amounts and concentrations as to yield solutions followed by neutralisation, or with alkaline lyes using mineral acid using nitric acid (nitrophosphates)
Abstract
The invention discloses a kind of preparation methods of the granular nitro high-nitrogen compound fertilizer with high storage stability, belong to chemical fertilizer preparing technical field, its step are as follows：(1) the molten processing altogether of potassium nitrate and ammonium nitrate phosphorus；(2) preparation of solid material；(3) preparation of granule materials；(4) preparation of the granular nitro high-nitrogen compound fertilizer with high storage stability:By granule materials obtained by step (3) by drying, screening, cooling, package process, the granular nitro high-nitrogen compound fertilizer with high storage stability is obtained.The present invention improves the storage stability of particle nitro-compound fertilizer material by optimization of C/C composites and technique, and significant effect is easy to carry out.
Description
Technical field
It is more particularly to a kind of with high storage stability the present invention relates to a kind of preparation method of nitro high-nitrogen compound fertilizer
The preparation method of granular nitro high-nitrogen compound fertilizer, belongs to chemical fertilizer preparing technical field.
Background technology
Compound fertilizer mainly includes ammonium nitrogen, amidonitrogen and nitrate nitrogen, wherein nitrate nitrogen for the nitrogen source that crop provides
It is a kind of quick-acting nitrogen sources needed for plant, is that quick-acting compound fertilizers and water soluble fertilizer must be to be added.Nitrogen is by nitrate anion
(NO3 -1) and ammonium root (NH4 +1) composition is known as nitro-compound fertilizer, the industrial crops such as tobacco, fruit tree, most vegetables are hobby nitre states
Nitrogen, particularly with some crops to nitrate nitrogen sensitivity, the ratio of nitrate nitrogen and ammonium nitrogen influences whether crop in fertilizer
Yield.
Nitro high-nitrogen compound fertilizer (refers to N P and K total nutrient more than 40%, wherein total nitrogen content ≤17%, and nitrate nitrogen
Account for more than 28% total nitrogen) structure is very unstable in storing process is stacked, fertilizer is easily hardened into bulk, lose flowability and
Dispersibility, can not spread fertilizer over the fields or mechanized application, many inconvenience be caused to user, so granulated fertilizer is steady during storage
Qualitative is an important index.
The source of nitrate nitrogen is mainly provided using ammonium nitrate phosphorus (ANP) in conventional compound fertilizer formula, especially right
In nitro high-nitrogen compound fertilizer, the dosage of ammonium nitrate phosphorus (ANP) in formula is up to 30-40%, and ammonium nitrate phosphorus (ANP) refers to industrial nitre
Sour ammonium (AN) carries out uprising modified obtained agricultural fertilizer, and due to having, good water solubility, quick-acting, nitrogen content is high, of low cost
The advantages that, agriculturally very popular.In general, ammonium nitrate (AN) solution is with powdery monoammonium phosphate, uprising dose on a small quantity, according to certain
Ratio congruent melting (ammonium nitrate (AN) that mass fraction is 90% or so and the monoammonium phosphate that mass fraction is 10% or so) whitewashing is made
Grain obtains prilled ammonium nitrate phosphorus (ANP).Phosphorus element, uprising dose of introducing ammonium nitrate (AN), modified purpose are to improve anti-knock properties, are added in
Ammonium nitrate phosphorus (ANP) after modifying agent can not be reduced into ammonium nitrate (AN), and not explosibility, the safety of ammonium nitrate phosphorus (ANP)
Can more it stablize, therefore, ammonium nitrate phosphorus (ANP) becomes the raw material of composite heat transfer instead of ammonium nitrate (AN).Ammonium nitrate phosphorus
(ANP) nutrient content is 32-4 or so (nitrogenous 32%, containing phosphorus pentoxide 4%).Fertilizer industry is to ammonium nitrate phosphorus (ANP)
Focus is typically nutrient content, nitrate nitrogen content, anti-knock properties, thermal stability, high temperature safety, and for ammonium nitrate phosphorus (ANP)
Physical property and structural analysis in terms of report it is also less.
Existing preventing blocking technology is the coating anticaking agent of outer surface more, makes to be physically isolated between fertiliser granulates, reach
To the purpose for slowing down caking, such as using inert powder, high molecular polymer, surfactant, organic hydrophobing agent etc..But
It is at present, anti-caking to be coated with by surface, effect basically reaches maximization, continues to be coated with anticaking agent, Neng Gouti from outer surface
The anti-caking limitation risen, and universal due to industrialized agriculture, to the physical property of fertilizer there has also been tightened up requirement, therefore
Reduce the introducing of water-insoluble and oil product can avoid fertilizer result in blockage to drip irrigation facilities caused by economic loss.
Therefore it provides a kind of storage stability that can further improve granular nitro high-nitrogen compound fertilizer and reducing water
The introducing of insoluble matter and oil product and then the granular nitro with high storage stability that fertilizer is avoided to result in blockage drip irrigation facilities
The preparation method of high-nitrogen compound fertilizer just becomes the technical field and is badly in need of the technical barrier solved.
Invention content
The object of the present invention is to the problem of storage for nitro high-nitrogen compound fertilizer is unstable, provides one kind and is deposited with height
The preparation method of the granular nitro high-nitrogen compound fertilizer of stability is stored up, granulated fertilizer is made to be protected during prolonged packed stacking
It is fixed to keep steady, youngster prevented from caking.
The above-mentioned purpose of the present invention reaches by the following technical programs：
Scheme 1：
A kind of preparation method of the granular nitro high-nitrogen compound fertilizer with high storage stability, its step are as follows：
(1) the molten processing altogether of potassium nitrate and ammonium nitrate phosphorus
In fertilizer formula, the ammonium nitrate phosphorus of fertilizer gross mass 10%-34%, the potassium nitrate of 9%-30%, by which part are accounted for
Potassium nitrate forms common solution with ammonium nitrate phosphorus, the constant temperature at 90-135 DEG C, and stirring is dried, cooled down and crushes, and forms modified nitre state
Nitrogen；
(2) preparation of solid material
By in the modification nitrate nitrogen obtained in step (1), remaining potassium nitrate and fertilizer formula other ammonium nitrogen sources, phosphorus
Source, sylvite, filler are stirred, and mixed material is transported in rotary drum granulator by feed belt, obtains solid material；
(3) preparation of granule materials
The liquid nitrogen for accounting for fertilizer gross mass 4.3%-4.5% (is accounted for fertilizer gross mass, provided by liquefied ammonia, similarly hereinafter), accounts for fertilizer
The phosphorus pentoxide (account for fertilizer gross mass, provided by phosphoric acid, similarly hereinafter) of gross mass 6.78%-6.84% is provided, accounts for fertilizer gross mass
The sulfate radical (being provided by sulfuric acid, similarly hereinafter) of 9.6%-10.22%, after being sufficiently mixed in tubular reactor, obtains liquid phase material,
Be ejected into the solid material of step (2), in tubular reactor simultaneously be passed through cleaning solution for adjust granulation humidity, liquid phase
Material is coated with granulating particle with solid-phase material in rotary drum granulator；Liquid phase feed passes through the Flux Valve Control unit interval
Addition；Steam is adjusted manually by valve, and steam jet is inserted into the material bed of solid-phase material, and being passed through for steam is made for adjusting
Grain humidity, obtains granule materials；
(4) preparation of the granular nitro high-nitrogen compound fertilizer with high storage stability
By granule materials obtained by step (3) by drying, screening, cooling, package process, obtain that there is high storage stability
Granular nitro high-nitrogen compound fertilizer.
Preferably, in the step (1), the part potassium nitrate accounts for 2 weight %-35 weight % of ammonium nitrate phosphorus.
Preferably, in the step (1), the modified nitrate nitrogen is powder, and powder granularity is below 40 mesh.
Preferably, in the step (1), mass percent of the ammonium nitrate phosphorus (ANP) in fertilizer formula is 13.1%-
31.27%, the mass percent of potassium nitrate is 9.56%-28.67%.
Scheme 2：
A kind of preparation method of the granular nitro high-nitrogen compound fertilizer with high storage stability, its step are as follows：
(1) melt process of potassium nitrate and ammonium nitrate phosphorus
In fertilizer formula, the ammonium nitrate phosphorus of fertilizer gross mass 10%-34%, the potassium nitrate of 9%-30%, by which part are accounted for
Potassium nitrate is with ammonium nitrate phosphorus by high-temperature fusion, and after forming slurry, whitewashing curing, cooling forms modified nitrate nitrogen；
(2) preparation of solid material
By in the modification nitrate nitrogen obtained in step (1), remaining potassium nitrate and fertilizer formula other ammonium nitrogen sources, phosphorus
Source, sylvite, filler are stirred, and mixed material is transported in rotary drum granulator by feed belt, obtains solid material；
(3) preparation of granule materials
The liquid nitrogen of fertilizer gross mass 4.3%-4.5% will be accounted for, account for five oxidations two of fertilizer gross mass 6.78%-6.84%
Phosphorus accounts for the sulfate radical of fertilizer gross mass 9.6%-10.22%, after being sufficiently mixed in tubular reactor, obtains liquid phase material, spray
Be mapped in the solid material of step (2), in tubular reactor simultaneously be passed through cleaning solution for adjust granulation humidity, liquid phase object
Material is coated with granulating particle with solid-phase material in rotary drum granulator；Liquid phase feed is added by the Flux Valve Control unit interval
Enter amount；Steam is adjusted manually by valve, and steam jet is inserted into the material bed of solid-phase material, and being passed through for steam is granulated for adjusting
Humidity obtains granule materials；
(4) preparation of the granular nitro high-nitrogen compound fertilizer with high storage stability
By granule materials obtained by step (3) by drying, screening, cooling, package process, obtain that there is high storage stability
Granular nitro high-nitrogen compound fertilizer.
Preferably, in the step (1), the part potassium nitrate accounts for 1 weight %-10 weight % of ammonium nitrate phosphorus.
Preferably, in the step (1), the modified nitrate nitrogen is granular, the particle of below average grain diameter 2.8mm.
Preferably, in the step (1), mass percent of the ammonium nitrate phosphorus (ANP) in fertilizer formula is 13.1%-
31.27%, the mass percent of potassium nitrate is 9.56%-28.67%.
Scheme 3：
A kind of preparation method of the granular nitro high-nitrogen compound fertilizer with high storage stability, its step are as follows：
(1) the molten processing altogether of potassium nitrate and ammonium nitrate phosphorus
In fertilizer formula, the ammonium nitrate phosphorus of fertilizer gross mass 10%-34%, the potassium nitrate of 9%-30%, by which part are accounted for
Potassium nitrate forms common solution with ammonium nitrate phosphorus, the constant temperature at 90-135 DEG C, and stirring forms stable common solution, spare；
(2) preparation of solid material
By in remaining potassium nitrate in step (1) and fertilizer formula other ammonium nitrogen sources, phosphorus source, sylvite, filler stir
Mixing, mixed material are transported to by feed belt in rotary drum granulator, obtain original solid material；It will be obtained in step (1)
Common solution be ejected on original solid material by nozzle, participate in bond granulating, obtain solid material；
(3) preparation of granule materials
The liquid nitrogen for accounting for fertilizer gross mass 4.3%-4.5% (is accounted for fertilizer gross mass, provided by liquefied ammonia, similarly hereinafter), accounts for fertilizer
The phosphorus pentoxide (account for fertilizer gross mass, provided by phosphoric acid, similarly hereinafter) of gross mass 6.78%-6.84% is provided, accounts for fertilizer gross mass
The sulfate radical (being provided by sulfuric acid, similarly hereinafter) of 9.6%-10.22%, after being sufficiently mixed in tubular reactor, obtains liquid phase material,
Be ejected into the solid material of step (2), in tubular reactor simultaneously be passed through cleaning solution for adjust granulation humidity, liquid phase
Material is coated with granulating particle with solid-phase material in rotary drum granulator；Liquid phase feed passes through the Flux Valve Control unit interval
Addition；Steam is adjusted manually by valve, and steam jet is inserted into the material bed of solid-phase material, and being passed through for steam is made for adjusting
Grain humidity, obtains granule materials；
(4) preparation of the granular nitro high-nitrogen compound fertilizer with high storage stability
By granule materials obtained by step (3) by drying, screening, cooling, package process, obtain that there is high storage stability
Granular nitro high-nitrogen compound fertilizer.
Preferably, part potassium nitrate described in the step (1) accounts for 2 weight %-35 weight % of ammonium nitrate phosphorus.
Preferably, in the step (1), the modified nitrate nitrogen is powdery, and powder granularity is below 40 mesh.
Preferably, mass percent of the ammonium nitrate phosphorus (ANP) in fertilizer formula is 13.1%- in the step (1)
31.27%, the mass percent of potassium nitrate is 9.56%-28.67%.
Preferably, the granular nitro high-nitrogen compound fertilizer refers to N P and K total nutrient more than 40%, and wherein nitrogen content exists
≤ 17%, and nitrate nitrogen accounts for more than the 28% of total nitrogen, nitro-compound fertilizer particle size is in 2.0-4.8mm.
Preferably, the grade of the granular nitro high-nitrogen compound fertilizer includes 22-8-10,20-10-10,17-17-
17,18-9-18, but it is not limited to above-mentioned grade.
Preferably, other ammonium nitrogen sources described in the step (2), phosphorus source, sylvite, filler include liquefied ammonia, phosphoric acid, sulphur
Acid, potassium sulfate, potassium chloride, ammonium sulfate, monoammonium phosphate, calcium superphosphate and sepiolite.
Preferably, other ammonium nitrogen sources, phosphorus source, sylvite, filler described in the step (2) are：Account for fertilizer gross mass
The potassium nitrate of 4.56%-22.67%, accounts for fertilizer gross mass at the monoammonium phosphate for accounting for fertilizer gross mass 2.92%-4.5%
The potassium sulfate of 25.41%-9.26% accounts for fertilizer gross mass 2.8%-3.0% calcium superphosphate.
Preferably, ammonium nitrate accounts for the 82%-98% of gross mass in the ammonium nitrate phosphorus, and phosphorus pentoxide content contains in ammonium nitrate phosphorus
It measures as 2%-8%.
Advantageous effect：
Different from the outer surface coating and cladding agent in granulated fertilizer, the present invention is promoted by limiting dispensing type with quantity
The storage stability of nitro-compound fertilizer reduces the mass fraction of ammonium nitrate phosphorus (ANP) in dispensing, introduces potassium nitrate (KNO3) as fertilizer
Second source of nitrate nitrogen in material, and the mass fraction of potassium sulfate is reduced in dispensing, while other dispensings are according to most preliminary design
The nutrient content of fixed NPK is adjusted, and ensures that nitrogen, phosphorus, potassium nutrition content and nitrate nitrogen in formula be former and ammonium nitrogen
In the case that ratio is basically unchanged, weaken nitro-compound fertilizer in cholesteric-nematic transition, improve fertilizer long-time storage stability and
Caking performance avoids insoluble matter and resulting in blockage to drip irrigation facilities for oil product caused by excessively introducing coating agent and causes
Economic loss.
Below by specific implementation, the present invention will be further described, but is not meant to the limit to the scope of the present invention
System.
It is involved such as the methods of heating and drying in example below, it is that this field is normal if do not illustrated
The method of rule；Equipment used and material are the equipment that this field can be obtained by commercial channel if do not illustrated
And material.
Specific embodiment
Raw material：The raw material of fertilizer is the convenient source obtained by commercial channel in following comparative examples and embodiment；Nitre
Sour potassium is the convenient source obtained by commercial channel；Ammonium nitrate accounts for the 82%-98% of gross mass in ammonium nitrate phosphorus, and phosphorus pentoxide contains
Amount content in ammonium nitrate phosphorus is 2%-8%.
Comparative example 1
Existing technique prepares 18-9-18SOP compound fertilizers, and its step are as follows：
(1) preparation of solid material
It accounts for the monoammonium phosphate (nutrient content 11-49) of fertilizer gross mass 2.14%, 33.78% potassium sulfate, 2.8% cross phosphorus
Sour calcium, 40.39% ammonium nitrate phosphorus (nutrient content 32-4), after being stirred, by Belt Conveying to rotary drum granulator, obtaining
Solid material；
(2) preparation of granule materials
By 3% liquid nitrogen (accounting for fertilizer gross mass, provided by liquefied ammonia), 6.88% phosphorus pentoxide (accounts for the total matter of fertilizer
Amount, is provided by phosphoric acid), sulfate radical 4.97% (is provided) by sulfuric acid, after being sufficiently mixed in tubular reactor, obtains liquid phase object
Material, be ejected into the solid material of step (1), in tubular reactor simultaneously be passed through cleaning solution for adjust granulation humidity, liquid
Phase materials are coated with granulating particle with solid-phase material in rotary drum granulator；Liquid phase feed passes through the Flux Valve Control unit interval
Addition；Steam is adjusted manually by valve, and steam jet is inserted into the material bed of solid-phase material, and steam is passed through to adjust
Humidity is granulated, obtains granule materials；
(3) preparation of granular 18-9-18SOP compound fertilizers
Grain size is prepared as 2-4.8mm by drying, screening, cooling, package process in granule materials obtained by step (2)
Granular complex fertilizer, grade be nitro 18-9-18.
Embodiment 1
A kind of preparation method of the 18-9-18SOP compound fertilizers with high storage stability, its step are as follows：
(1) the molten processing altogether of potassium nitrate and ammonium nitrate phosphorus
In fertilizer formula, the ammonium nitrate phosphorus of fertilizer gross mass 31.27%, 9.56% potassium nitrate, by wherein 5% nitric acid are accounted for
Potassium and 31.27% ammonium nitrate phosphorus form common solution of the water content for 15 weight % or so, and 120 DEG C of constant temperature stir half an hour, will expect
It dries, cool down and be crushed to 40 mesh hereinafter, forming powdered modified nitrate nitrogen；
(2) preparation of solid material
By in step (1) powdered modified nitrate nitrogen, account for fertilizer gross mass 4.56% potassium nitrate, account for fertilizer gross mass
2.92% monoammonium phosphate, the potassium sulfate for accounting for fertilizer gross mass 25.41% account for 2.8% calcium superphosphate of fertilizer gross mass, and stirring is mixed
It closes, by Belt Conveying to rotary drum granulator, obtaining solid material；
(3) preparation of granule materials
The liquid nitrogen for accounting for fertilizer gross mass 4.5% (is accounted for fertilizer gross mass, provided by liquefied ammonia, similarly hereinafter), accounts for the total matter of fertilizer
The phosphorus pentoxide (account for fertilizer gross mass, provided by phosphoric acid, similarly hereinafter) of amount 6.84% accounts for the sulfuric acid of fertilizer gross mass 10.22%
Root (is provided, similarly hereinafter) by sulfuric acid, after being sufficiently mixed in tubular reactor, obtains liquid phase material, is ejected into the solid of step (2)
In material, be passed through simultaneously in tubular reactor cleaning solution for adjust the humidity that is granulated, liquid phase material and solid-phase material turn
Granulating particle is coated in drum comminutor；The addition that liquid phase feed passes through the Flux Valve Control unit interval；Steam passes through valve
Door is adjusted manually, and steam jet is inserted into the material bed of solid-phase material, and being passed through for steam is granulated humidity for adjusting, and obtains particulate matter
Material；
(4) preparation of the 18-9-18SOP compound fertilizers with high storage stability
By granule materials obtained by step (3) by drying, screening, cooling, package process, the 18-9- of 2-4.8mm is obtained
18SOP granular complex fertilizers 1, grade are nitro 18-9-18.
Embodiment 2
A kind of preparation method of the 18-9-18SOP compound fertilizers with high storage stability, its step are as follows：
(1) the molten processing altogether of potassium nitrate and ammonium nitrate phosphorus
In fertilizer formula, the ammonium nitrate phosphorus for accounting for fertilizer gross mass 22.16% is 19.12% potassium nitrate, by wherein 6.5%
The ammonium nitrate phosphorus of potassium nitrate and 22.16 weight % form common solution of the water content for 15 weight % or so, and 90 DEG C of constant temperature stirrings half are small
When, material is dried, is cooled down and is crushed to 40 mesh hereinafter, forming powdered modified nitrate nitrogen；
(2) preparation of solid material
By in step (1) powdered modified nitrate nitrogen, account for fertilizer gross mass 12.62% potassium nitrate, account for fertilizer gross mass
3.7% monoammonium phosphate, the potassium sulfate for accounting for fertilizer gross mass 17.06% account for 2.8% calcium superphosphate of fertilizer gross mass, account for fertilizer
7.53% ammonium sulfate of gross mass, is stirred, by Belt Conveying to rotary drum granulator, obtaining solid material；
(3) preparation of granule materials
By the liquid nitrogen for accounting for fertilizer gross mass 4.43%, account for the phosphorus pentoxide of fertilizer gross mass 6.82% and to account for fertilizer total
The sulfate radical (being provided by sulfuric acid) of quality 9.96%, after being sufficiently mixed in tubular reactor, obtains liquid phase material, is ejected into step
Suddenly in the solid material of (2), in tubular reactor simultaneously be passed through cleaning solution for adjust be granulated humidity, liquid phase material with admittedly
Phase materials are coated with granulating particle in rotary drum granulator；The addition that liquid phase feed passes through the Flux Valve Control unit interval；
Steam is adjusted manually by valve, and steam jet is inserted into the material bed of solid-phase material, and being passed through for steam is granulated humidity for adjusting,
Obtain granule materials；
(4) preparation of the 18-9-18SOP compound fertilizers with high storage stability
By granule materials obtained by step (3) by drying, screening, cooling, package process, the particle for obtaining 2-4.8mm is answered
Hefei material 2, grade are nitro 18-9-18.
Embodiment 3
A kind of preparation method of the 18-9-18SOP compound fertilizers with high storage stability, its step are as follows：
(1) the molten processing altogether of potassium nitrate and ammonium nitrate phosphorus
In fertilizer formula, the ammonium nitrate phosphorus of fertilizer gross mass 13.1% is accounted for, accounts for the potassium nitrate of fertilizer gross mass 28.67%, it will
Wherein 4% potassium nitrate and 13.1% ammonium nitrate phosphorus form common solution of the water content for 15 weight % or so, 135 DEG C of constant temperature stirrings
Material is dried, cooled down and is crushed to 40 mesh hereinafter, forming powdered modified nitrate nitrogen by half an hour；
(2) preparation of solid material
By in step (1) powdered modified nitrate nitrogen, the potassium nitrate, 4.5% phosphoric acid one that account for fertilizer gross mass 24.67%
Ammonium, 8.72% potassium sulfate, 2.8% calcium superphosphate, 15.2% ammonium sulfate, after being stirred, by Belt Conveying to rotary drum
In comminutor, solid material is obtained；
(3) preparation of granule materials
The liquid nitrogen of fertilizer gross mass 4.3% will be accounted for, 6.78% phosphorus pentoxide, 9.6% sulfate radical is anti-in tubular type
It answers after being sufficiently mixed in device, obtains liquid phase material, be ejected into the solid material of step (2), lead to simultaneously in tubular reactor
Enter cleaning solution for adjust the humidity that is granulated, liquid phase material and solid-phase material are coated with granulating particle in rotary drum granulator；Liquid phase
The addition that raw material passes through the Flux Valve Control unit interval；Steam is adjusted manually by valve, and steam jet is inserted into solid phase
In the material bed of material, being passed through for steam is granulated humidity for adjusting, and obtains granule materials；
(4) preparation of the 18-9-18SOP compound fertilizers with high storage stability
By granule materials obtained by step (3) by drying, screening, cooling, package process, the particle for obtaining 2-4.8mm is answered
Hefei material 3, grade are nitro 18-9-18.
Embodiment 4
A kind of preparation method of the 18-9-18SOP compound fertilizers with high storage stability, its step are as follows：
(1) the molten processing altogether of potassium nitrate and ammonium nitrate phosphorus
In fertilizer formula, the ammonium nitrate phosphorus of fertilizer gross mass 13.1% is accounted for, accounts for the potassium nitrate of fertilizer gross mass 28.67%, it will
Wherein 1.2% potassium nitrate and 13.1% ammonium nitrate phosphorus, after high-temperature fusion forms slurry, whitewashing cooling forms granular change
Property nitrate nitrogen, average grain diameter 2.0mm；
(2) preparation of solid material
By in step (1) granular modified nitrate nitrogen, the potassium nitrate, 4.5% phosphoric acid one that account for fertilizer gross mass 27.67%
Ammonium, 8.72% potassium sulfate, 2.8% calcium superphosphate, 15.2% ammonium sulfate, after being stirred, by Belt Conveying to rotary drum
In comminutor, solid material is obtained；
(3) preparation of granule materials
The liquid nitrogen of fertilizer gross mass 4.3% will be accounted for, 6.78% phosphorus pentoxide, 9.6% sulfate radical is anti-in tubular type
It answers after being sufficiently mixed in device, obtains liquid phase material, be ejected into the solid material of step (2), lead to simultaneously in tubular reactor
Enter cleaning solution for adjust the humidity that is granulated, liquid phase material and solid-phase material are coated with granulating particle in rotary drum granulator；Liquid phase
The addition that raw material passes through the Flux Valve Control unit interval；Steam is adjusted manually by valve, and steam jet is inserted into solid phase
In the material bed of material, being passed through for steam is granulated humidity for adjusting, and obtains granule materials；
(4) preparation of the 18-9-18SOP compound fertilizers with high storage stability
By granule materials obtained by step (3) by drying, screening, cooling, package process, the particle for obtaining 2-4.8mm is answered
Hefei material 4, grade are nitro 18-9-18.
Embodiment 5
A kind of preparation method of the 18-9-18SOP compound fertilizers with high storage stability, its step are as follows：
(1) the molten processing altogether of potassium nitrate and ammonium nitrate phosphorus
In fertilizer formula, the ammonium nitrate phosphorus of fertilizer gross mass 13.1% is accounted for, accounts for the potassium nitrate of fertilizer gross mass 28.67%, it will
Wherein 4% potassium nitrate and 13.1% ammonium nitrate phosphorus form common solution, and 135 DEG C of constant temperature stir half an hour, are formed stable molten altogether
Slurry；
(2) preparation of solid material
The potassium nitrate of fertilizer gross mass 24.67%, 4.5% monoammonium phosphate, 8.72% potassium sulfate, 2.8% mistake will be accounted for
Calcium phosphate, 15.2% ammonium sulfate, after being stirred, by Belt Conveying to rotary drum granulator, obtaining original solid material；It will
Mutual solution slip in step (1) is ejected by nozzle in original solid material, obtains solid material；
(3) preparation of granule materials
The liquid nitrogen of fertilizer gross mass 4.3% will be accounted for, 6.78% phosphorus pentoxide, 9.6% sulfate radical is anti-in tubular type
It answers after being sufficiently mixed in device, obtains liquid phase material, be ejected into the solid material that step (2) obtains, it is same in tubular reactor
When be passed through cleaning solution for adjust the humidity that is granulated, liquid phase material and solid-phase material are coated with granulating particle in rotary drum granulator；
The addition that liquid phase feed passes through the Flux Valve Control unit interval；Steam is adjusted manually by valve, and steam jet is inserted into
In the material bed of solid-phase material, being passed through for steam is granulated humidity for adjusting, and obtains granule materials；
(4) preparation of the 18-9-18SOP compound fertilizers with high storage stability
By granule materials obtained by step (3) by drying, screening, cooling, package process, the particle for obtaining 2-4.8mm is answered
Hefei material 5, grade are nitro 18-9-18
Briquetting method：Uniformly screening 2.0-4.0mm nitro-compound fertilizer particles, are put into internal diameter 4cm, the cylinder barrel of high 5cm
In, imposing a condition is：Ballast weight 10kg, -25 DEG C of cyclically-varyings of briquetting temperature 60 C, a length of 5 days during briquetting, in the setting
Under the conditions of, loose granular ammonium nitrate can the hardened diameter 4cm into cylindricality bulk, the shearing force of blocky ammonium nitrate is bigger, says
Isotropic disk knot is more serious, and the smaller hardened degree of explanation of shearing force is lighter, and briquetting is repeated 10 times, and 10 times shearing force is averaged.
Embodiment data analysis
The cross shear average value of granular complex fertilizer in embodiment 1,2,3,4,5 be respectively 55.86N, 29.88N,
25.42N, 21.69N, 22.68N；The cross shear average value of granular complex fertilizer in comparative example 1 is 100.66N.
Shearing force is bigger illustrate particle between cohesive force it is stronger, blocking compound fertilizer granules are more.Above-mentioned conclusion explanation, leads to
The storage stability of nitro-compound fertilizer can be promoted by crossing restriction dispensing type and quantity, and technology of the invention is to improve composite fertilizer to prevent
One effective innovative technology in caking field.
The present inventor is using instruments such as X-ray diffraction, differential scanning calorimeter, thermodilatometric analysis instrument, infrared spectrums to nitre
The physical property of ammonium phosphorus (ANP) has carried out comprehensive analysis, finds ammonium nitrate phosphorus (ANP) in the storage stability and formula of nitro high nitrogen fertilizer
Dosage and physical property have relationship, therefore carried out it is a series of experiment optimization is adjusted to nitro high-nitrogen compound fertilizer formula, it is right
Ammonium nitrate phosphorus (ANP) is modified, and achieves good improvement, and the storage stability of nitro-compound fertilizer has obtained significantly
It improves.
Different from the outer surface coating and cladding agent in granulated fertilizer, the side disclosed by the invention for improving fertilizer storage stability
Method is started with from change fertilizer internal structure, under the premise of fertilizer nutrient content and nitrate nitrogen are with ammonium nitrogen constant rate, is led to
Optimizing raw material type is crossed, the modification of early period is carried out to raw material, the type of optimization dispensing improves fertilizer storage with proportioning to reach
The purpose of stability.Present invention introduces potassium nitrate to substitute the nitrate nitrogen in the original formulation of part in ammonium nitrate phosphorus, while using nitric acid
Potassium is modified the ammonium nitrate phosphorus in formula, and application obscure portions potassium nitrate carries out molten pretreatment (modified ammonium nitrate phosphorus) altogether with ammonium nitrate phosphorus,
It is granulated again with unclassified stores later, weakens the cholesteric-nematic transition in granulated fertilizer, promote fertilizer storage stability and anti-caking
Ability.
The present invention promotes the storage stability of nitro-compound fertilizer by limiting dispensing type with quantity, and nitre is reduced in dispensing
The mass fraction of ammonium phosphorus (ANP) introduces potassium nitrate (KNO3) second source as nitrate nitrogen in fertilizer, and reduced in dispensing
The mass fraction of potassium sulfate, while other dispensings are adjusted according to the nutrient content of the NPK initially set up, ensure formula
In nitrogen, phosphorus, potassium nutrition content and nitrate nitrogen original and ammonium nitrogen ratio be basically unchanged in the case of, weaken nitro-compound fertilizer in
Cholesteric-nematic transition, improve the long-time storage stability and caking performance of fertilizer.
Claims (10)
1. a kind of preparation method of the granular nitro high-nitrogen compound fertilizer with high storage stability, its step are as follows：
(1) the molten processing altogether of potassium nitrate and ammonium nitrate phosphorus
In fertilizer formula, the ammonium nitrate phosphorus of fertilizer gross mass 10%-34%, the potassium nitrate of 9%-30%, by which part nitric acid are accounted for
Potassium forms common solution with ammonium nitrate phosphorus, the constant temperature at 90-135 DEG C, and material is dried, cooled down and crushed by stirring, forms modified nitre state
Nitrogen；
(2) preparation of solid material
By in the modification nitrate nitrogen obtained in step (1), remaining potassium nitrate and fertilizer formula other ammonium nitrogen sources, phosphorus source,
Sylvite, filler are stirred, and mixed material is transported in rotary drum granulator by feed belt, obtains solid material；
(3) preparation of granule materials
The liquid nitrogen of fertilizer gross mass 4.3%-4.5% will be accounted for, accounts for the phosphorus pentoxide of fertilizer gross mass 6.78%-6.84%,
The sulfate radical of fertilizer gross mass 9.6%-10.22% is accounted for, after being sufficiently mixed in tubular reactor, obtains liquid phase material, is sprayed
Into the solid material of step (2), in tubular reactor simultaneously be passed through cleaning solution for adjust granulation humidity, liquid phase material
Granulating particle is coated in rotary drum granulator with solid-phase material；The addition that liquid phase feed passes through the Flux Valve Control unit interval
Amount；Steam is adjusted manually by valve, and steam jet is inserted into the material bed of solid-phase material, and being passed through for steam is wet for adjusting granulation
Degree, obtains granule materials；
(4) preparation of the granular nitro high-nitrogen compound fertilizer with high storage stability
By granule materials obtained by step (3) by drying, screening, cooling, package process, the grain with high storage stability is obtained
Shape nitro high-nitrogen compound fertilizer.
2. the preparation method of the granular nitro high-nitrogen compound fertilizer according to claim 1 with high storage stability, special
Sign is：Part potassium nitrate described in the step (1) accounts for 2 weight %-35 weight % of ammonium nitrate phosphorus.
3. the preparation method of the granular nitro high-nitrogen compound fertilizer according to claim 1 with high storage stability, special
Sign is：In the step (1), the modified nitrate nitrogen is powdery, and powder granularity is below 40 mesh.
4. the preparation method of the granular nitro high-nitrogen compound fertilizer according to claim 1 with high storage stability, special
Sign is：In the step (1), mass percent of the ammonium nitrate phosphorus in fertilizer formula be 13.1%-31.27%, nitric acid
The mass percent of potassium is 9.56%-28.67%.
5. a kind of preparation method of the granular nitro high-nitrogen compound fertilizer with high storage stability, its step are as follows：
(1) melt process of potassium nitrate and ammonium nitrate phosphorus
In fertilizer formula, the ammonium nitrate phosphorus of fertilizer gross mass 10%-34%, the potassium nitrate of 9%-30%, by which part nitric acid are accounted for
Potassium is with ammonium nitrate phosphorus by high-temperature fusion, and after forming slurry, whitewashing curing, cooling forms modified nitrate nitrogen；
(2) preparation of solid material
By in the modification nitrate nitrogen obtained in step (1), remaining potassium nitrate and fertilizer formula other ammonium nitrogen sources, phosphorus source,
Sylvite, filler are stirred, and mixed material is transported in rotary drum granulator by feed belt, obtains solid material；
(3) preparation of granule materials
The liquid nitrogen of fertilizer gross mass 4.3%-4.5% will be accounted for, accounts for the phosphorus pentoxide of fertilizer gross mass 6.78%-6.84%,
The sulfate radical of fertilizer gross mass 9.6%-10.22% is accounted for, after being sufficiently mixed in tubular reactor, obtains liquid phase material, is sprayed
Into the solid material of step (2), in tubular reactor simultaneously be passed through cleaning solution for adjust granulation humidity, liquid phase material
Granulating particle is coated in rotary drum granulator with solid-phase material；The addition that liquid phase feed passes through the Flux Valve Control unit interval
Amount；Steam is adjusted manually by valve, and steam jet is inserted into the material bed of solid-phase material, and being passed through for steam is wet for adjusting granulation
Degree, obtains granule materials；
(4) preparation of the granular nitro high-nitrogen compound fertilizer with high storage stability
By granule materials obtained by step (3) by drying, screening, cooling, package process, the grain with high storage stability is obtained
Shape nitro high-nitrogen compound fertilizer.
6. the preparation method of the granular nitro high-nitrogen compound fertilizer according to claim 5 with high storage stability, special
Sign is：Part potassium nitrate described in the step (1) accounts for 1 weight %-10 weight % of ammonium nitrate phosphorus.
7. the preparation method of the granular nitro high-nitrogen compound fertilizer according to claim 5 with high storage stability, special
Sign is：Modified nitrate nitrogen is granular described in the step (1), and granularity is in below 2.8mm.
8. a kind of preparation method of the granular nitro high-nitrogen compound fertilizer with high storage stability, its step are as follows：
(1) the molten processing altogether of potassium nitrate and ammonium nitrate phosphorus
In fertilizer formula, the ammonium nitrate phosphorus of fertilizer gross mass 10%-34% is accounted for, the potassium nitrate of 9%-30% is permanent at 90-135 DEG C
Temperature, stirring, forms stable common solution；
(2) preparation of solid material
By in the remaining potassium nitrate in step (1) and fertilizer formula other ammonium nitrogen sources, phosphorus source, sylvite, filler stirring it is mixed
It closes, mixed material is transported to by feed belt in rotary drum granulator, obtains original solid material；By what is obtained in step (1)
Solution is ejected by nozzle on original solid material altogether, is participated in bonding granulating, is obtained solid material；
(3) preparation of granule materials
The liquid nitrogen of fertilizer gross mass 4.3%-4.5% will be accounted for, accounts for the phosphorus pentoxide of fertilizer gross mass 6.78%-6.84%,
The sulfate radical of fertilizer gross mass 9.6%-10.22% is accounted for, after being sufficiently mixed in tubular reactor, obtains liquid phase material, is sprayed
Into the solid material of step (2), in tubular reactor simultaneously be passed through cleaning solution for adjust granulation humidity, liquid phase material
Granulating particle is coated in rotary drum granulator with solid-phase material；The addition that liquid phase feed passes through the Flux Valve Control unit interval
Amount；Steam is adjusted manually by valve, and steam jet is inserted into the material bed of solid-phase material, and being passed through for steam is wet for adjusting granulation
Degree, obtains granule materials；
(4) preparation of the granular nitro high-nitrogen compound fertilizer with high storage stability
By granule materials obtained by step (3) by drying, screening, cooling, package process, the grain with high storage stability is obtained
Shape nitro high-nitrogen compound fertilizer.
9. the preparation method of the granular nitro high-nitrogen compound fertilizer according to claim 8 with high storage stability, special
Sign is：The part potassium nitrate accounts for 2 weight %-35 weight % of ammonium nitrate phosphorus.
10. the system of the granular nitro high-nitrogen compound fertilizer with high storage stability according to any one of claim 1-9
Preparation Method, it is characterised in that：
The granular nitro high-nitrogen compound fertilizer refers to N P and K total nutrient more than 40%, wherein nitrogen content ≤17%, and nitre
State nitrogen accounts for more than 28% total nitrogen, and nitro-compound fertilizer particle size is in 2.0-4.8mm；
The grade of the granular nitro high-nitrogen compound fertilizer includes 22-8-10,20-10-10,17-17-17 or 18-9-
18；
Other ammonium nitrogen sources in the step (2), phosphorus source, sylvite, filler include liquefied ammonia, phosphoric acid, sulfuric acid, potassium sulfate, potassium chloride,
Ammonium sulfate, monoammonium phosphate, calcium superphosphate and sepiolite；
Alternatively, other ammonium nitrogen sources, phosphorus source, sylvite, filler are in the step (2)：Account for fertilizer gross mass 4.56%-
22.67% potassium nitrate, the monoammonium phosphate for accounting for fertilizer gross mass 2.92%-4.5% account for fertilizer gross mass 25.41%-9.26%
Potassium sulfate, account for fertilizer gross mass 2.8%-3.0% calcium superphosphate；
Ammonium nitrate accounts for the 82%-98% of gross mass in the ammonium nitrate phosphorus, and phosphorus pentoxide content content in ammonium nitrate phosphorus is 2%-
8%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810226423.3A CN108218513B (en) | 2018-03-19 | 2018-03-19 | Preparation method of granular nitro high-nitrogen compound fertilizer with high storage stability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810226423.3A CN108218513B (en) | 2018-03-19 | 2018-03-19 | Preparation method of granular nitro high-nitrogen compound fertilizer with high storage stability |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108218513A true CN108218513A (en) | 2018-06-29 |
| CN108218513B CN108218513B (en) | 2021-06-15 |
Family
ID=62659647
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810226423.3A Active CN108218513B (en) | 2018-03-19 | 2018-03-19 | Preparation method of granular nitro high-nitrogen compound fertilizer with high storage stability |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108218513B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109265228A (en) * | 2018-12-07 | 2019-01-25 | 中国-阿拉伯化肥有限公司 | A kind of long-acting compound fertilizer and preparation method thereof |
| CN109384251A (en) * | 2018-12-12 | 2019-02-26 | 青海盐湖工业股份有限公司 | A kind of prilling process of potassium nitrate and its potassium nitrate granules of preparation |
| CN109400376A (en) * | 2018-12-07 | 2019-03-01 | 中国-阿拉伯化肥有限公司 | A kind of compound fertilizer and preparation method thereof suitable for supporting shrimp rice field |
| CN113501509A (en) * | 2021-08-19 | 2021-10-15 | 云南云天化红磷化工有限公司 | System and method for preparing 66% powdery monoammonium phosphate by one-step method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101367682A (en) * | 2008-09-28 | 2009-02-18 | 中国-阿拉伯化肥有限公司 | Method for preparing complex fertilizer with mutual solution slip tubular reactor |
| CN103664301A (en) * | 2013-12-23 | 2014-03-26 | 史丹利化肥股份有限公司 | Tower-type melt granulation water-soluble fertilizer containing fulvic acid potassium macroelement and preparation method for fertilizer |
| CN104961535A (en) * | 2015-06-19 | 2015-10-07 | 陕西博农农资有限公司 | Potassium nitrate water-soluble compound fertilizer and method for manufacturing same |
| CN107141064A (en) * | 2017-05-12 | 2017-09-08 | 中国-阿拉伯化肥有限公司 | A kind of method for improving phosphorus-potassium nitrate fertilizer material agglomeration preventing performance |
-
2018
- 2018-03-19 CN CN201810226423.3A patent/CN108218513B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101367682A (en) * | 2008-09-28 | 2009-02-18 | 中国-阿拉伯化肥有限公司 | Method for preparing complex fertilizer with mutual solution slip tubular reactor |
| CN103664301A (en) * | 2013-12-23 | 2014-03-26 | 史丹利化肥股份有限公司 | Tower-type melt granulation water-soluble fertilizer containing fulvic acid potassium macroelement and preparation method for fertilizer |
| CN104961535A (en) * | 2015-06-19 | 2015-10-07 | 陕西博农农资有限公司 | Potassium nitrate water-soluble compound fertilizer and method for manufacturing same |
| CN107141064A (en) * | 2017-05-12 | 2017-09-08 | 中国-阿拉伯化肥有限公司 | A kind of method for improving phosphorus-potassium nitrate fertilizer material agglomeration preventing performance |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109265228A (en) * | 2018-12-07 | 2019-01-25 | 中国-阿拉伯化肥有限公司 | A kind of long-acting compound fertilizer and preparation method thereof |
| CN109400376A (en) * | 2018-12-07 | 2019-03-01 | 中国-阿拉伯化肥有限公司 | A kind of compound fertilizer and preparation method thereof suitable for supporting shrimp rice field |
| CN109384251A (en) * | 2018-12-12 | 2019-02-26 | 青海盐湖工业股份有限公司 | A kind of prilling process of potassium nitrate and its potassium nitrate granules of preparation |
| CN113501509A (en) * | 2021-08-19 | 2021-10-15 | 云南云天化红磷化工有限公司 | System and method for preparing 66% powdery monoammonium phosphate by one-step method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108218513B (en) | 2021-06-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| AU2019232821B2 (en) | Multi-purpose lignin-carbohydrate binding system | |
| CN108218513A (en) | A kind of preparation method of the granular nitro high-nitrogen compound fertilizer with high storage stability | |
| RU2034818C1 (en) | Homogeneous granular fertilizer, method of its production and method of enhancement of plant growth | |
| EP1127035B1 (en) | A process for the preparation of compound fertilizer granules | |
| CN104736499B (en) | For the urea passivating technique and passivation urea new product for making urea or compound based on urea can generally blend | |
| EP2885263A1 (en) | Improved compositions of substantially spherical particles | |
| CN104744164A (en) | Powdery potassium chloride granulation method taking synthesised urea resin as binder | |
| CN109704863A (en) | A kind of bulky grain sulfur-containing nitrogen fertilizer and preparation method thereof | |
| CN107141064A (en) | A kind of method for improving phosphorus-potassium nitrate fertilizer material agglomeration preventing performance | |
| CA1120282A (en) | Process for the preparation of a granular npk fertilizer and granular npk fertilizers obtained by this process | |
| CN106905054A (en) | A kind of production method of alginic acid containing nitrate nitrogen potassium SA Chemical Mixed Fertilizer high | |
| CN115427377A (en) | Zinc-coated urea fertilizer | |
| US20220048832A1 (en) | Acidified np, pk, npk fertilizer granules for fertigation | |
| CA1334561C (en) | Granular ammonium sulfate and process for the production thereof | |
| CN105503280A (en) | Production method for granular compound mixed nitrogen fertilizer | |
| JPH03237083A (en) | Neutral solid fertilizer | |
| US4256479A (en) | Granulation of fertilizer borate | |
| WO2019015067A1 (en) | Method of preparing moisture-proof urea specifically for blended fertilizer | |
| CN109265228A (en) | A kind of long-acting compound fertilizer and preparation method thereof | |
| US20100263420A1 (en) | Process for the continuous granulation of fertilizers | |
| CN113423679B (en) | Granular composition comprising calcium nitrate and molybdenum and method of making same | |
| EP4293000A1 (en) | Method for the manufacture of a solid, particulate fertilizer composition comprising an additive | |
| CN1267383C (en) | Pelleting process for composite manure | |
| CN106242872A (en) | A kind of high silicon Special fertilizer for paddy rice and production and application process | |
| CN1083815C (en) | Method for prodcing high effective ureido compound fertilizer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |