CN112645359B - Potassium nitrate low-tower granulation method and potassium nitrate granules prepared by same - Google Patents
Potassium nitrate low-tower granulation method and potassium nitrate granules prepared by same Download PDFInfo
- Publication number
- CN112645359B CN112645359B CN201910955036.8A CN201910955036A CN112645359B CN 112645359 B CN112645359 B CN 112645359B CN 201910955036 A CN201910955036 A CN 201910955036A CN 112645359 B CN112645359 B CN 112645359B
- Authority
- CN
- China
- Prior art keywords
- potassium nitrate
- particles
- tower
- granulating
- spherical
- 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.)
- Active
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D9/00—Nitrates of sodium, potassium or alkali metals in general
- C01D9/18—Preparation in the form of shaped products, e.g. granules
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Agronomy & Crop Science (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Inorganic Chemistry (AREA)
- Fertilizers (AREA)
Abstract
The invention belongs to the technical field of potassium nitrate manufacture, and provides a potassium nitrate low-tower granulation method and potassium nitrate particles prepared by the method, which comprise the following steps: and (3) putting the powdery potassium nitrate into a melting heating furnace for heating and melting, continuously stirring until the raw materials are completely melted to obtain liquid potassium nitrate, conveying the liquid potassium nitrate into a rotary granulator at the upper part of a granulating tower, uniformly dispersing and falling under the action of a granulating head of the rotary granulator to form spherical potassium nitrate particles, cooling the spherical potassium nitrate particles by a vibrating fluidized bed, screening, and packaging to obtain finished potassium nitrate particles. The granulating method has the advantages of simple process, low energy consumption, less crushing of the prepared potassium nitrate finished product particles, uniformity, smoothness, no material return, almost zero product empty shell rate, good product fluidity, high compression resistance, long agglomeration period, convenience for storage and transportation and convenience for use.
Description
Technical Field
The invention belongs to the technical field of potassium nitrate manufacturing, and particularly relates to a potassium nitrate low-tower granulation method and potassium nitrate particles prepared by the same.
Background
Potassium nitrate is an important industrial raw material, is also a high-quality chlorine-free nitrogen-potassium compound fertilizer, and is widely applied to the fields of national defense, military industry, agriculture, food additives, medicines, feed additives, optical glass, electronic industry and the like. The potassium nitrate is easy to agglomerate due to the influence of crystal shape, composition, structure, surface area, physicochemical property and surrounding storage environment, and the storage, transportation, use and the like are difficult. Therefore, the potassium nitrate needs to be granulated, so that the particle size is reduced, and the potassium nitrate is more convenient to transport, store and use.
The traditional potassium nitrate granulation adopts high tower granulation, the tower body is generally 25-45 m high, the construction cost is high, and more crushing of potassium nitrate particles is easy to occur in the production process; on the other hand, the traditional method adopts a slurry spraying method to granulate so that the granularity of the potassium nitrate granules is uneven and round, even some surfaces are provided with micropores, the granularity of the granules is overlarge, the returning charge is more, the empty shell rate of the potassium nitrate granulation is high, and the like.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a low-tower granulation method for potassium nitrate and potassium nitrate particles prepared by the method, and by adopting the method, the problems of the height of a traditional high-tower granulation tower for potassium nitrate, easiness in crushing particles, uneven and round granulation granularity, overlarge particle size, more returned materials, high empty shell rate and the like are solved.
In order to achieve the above object, the present invention adopts the following solutions:
a low tower granulation method of potassium nitrate, comprising the following steps:
(1) Preparing powdery potassium nitrate: evaporating and concentrating the potassium nitrate solution by a multi-effect evaporator, cooling and crystallizing, and carrying out solid-liquid separation by a centrifugal machine to obtain powdery potassium nitrate;
(2) Adding powdery potassium nitrate into a melting heating furnace for heating and melting, continuously stirring, controlling the heating temperature to be 330-380 ℃ until the raw materials are completely melted, obtaining liquid potassium nitrate, and overflowing the liquid potassium nitrate into a liquid potassium nitrate buffer tank;
(3) Pumping the liquid potassium nitrate obtained in the step (2) into a rotary granulator at the upper part of a granulation tower through a pump, and heating the rotary granulator to more than 330 ℃;
(4) The liquid potassium nitrate is evenly dispersed and falls under the action of a granulating head of a rotary granulator to form spherical potassium nitrate particles;
(5) And (3) collecting the spherical potassium nitrate particles obtained in the step (4), cooling through a vibrating fluidized bed, conveying to a sieving machine, sieving, conveying to a storage bin, and packaging to obtain finished potassium nitrate particles.
Further, the tower height of the granulation tower is 10-25 m.
Further, in the step (4), the granulating temperature is 330-340 ℃.
Further, in the step (5), the cooling temperature of the vibrating fluidized bed is 60-70 ℃.
Further, in the step (5), the sieving particle size of the sieving machine is 0.2-1.0 mm.
Further, in the step (2), the heating temperature is 335-345 ℃.
Further, in the step (2), the stirring time is 10-30 min.
Potassium nitrate granules produced by the potassium nitrate low tower granulation process of any one of the above.
The beneficial effects of the invention are as follows:
1. the granulating method has simple process, does not need to cool and dry in the granulating tower, greatly saves energy consumption, avoids the phenomenon of crushing potassium nitrate particles, is suitable for continuous mass production, and provides convenience for automation of process control.
2. The potassium nitrate finished product prepared by adopting the granulating method of the rotary granulator has the advantages of good product performance, high purity, low moisture, less particle breakage, uniform particle size, round surface, no need of returning materials, almost zero empty shell rate, good product fluidity, high compression resistance, long anti-caking period, convenience for storage and transportation and convenience for use.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a process flow diagram of the granulation process provided by the present invention;
FIG. 2 is a potassium nitrate granule product obtained in example 1 of the present invention;
FIG. 3 shows the potassium nitrate granule products obtained in examples 7 and 8 of the present invention;
FIG. 4 shows the products of the high-power microscope with potassium nitrate granules of various sizes obtained in examples 1 to 8 of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below. The specific conditions are not noted in the examples and are carried out according to conventional conditions or conditions recommended by the manufacturer. The reagents or apparatus used were conventional products commercially available without the manufacturer's attention.
The low-tower granulation method of potassium nitrate provided by the embodiment of the invention is specifically described below.
A low tower granulation method of potassium nitrate, comprising the following steps:
(1) Preparing powdery potassium nitrate: evaporating and concentrating the potassium nitrate solution by a multi-effect evaporator, cooling and crystallizing, and carrying out solid-liquid separation by a centrifugal machine to obtain powdery potassium nitrate;
(2) Adding powdery potassium nitrate into a melting heating furnace for heating and melting, continuously stirring, controlling the heating temperature to be 330-380 ℃ until the raw materials are completely melted, obtaining liquid potassium nitrate, and overflowing the liquid potassium nitrate into a liquid potassium nitrate buffer tank;
(3) Pumping the liquid potassium nitrate obtained in the step (2) into a rotary granulator at the upper part of a granulation tower through a pump, and heating the rotary granulator to more than 330 ℃;
(4) Uniformly dispersing and dropping the liquid potassium nitrate obtained in the step (3) under the action of a granulating head, so that spherical potassium nitrate particles are formed while the potassium nitrate drops drop in the high-temperature granulating tower;
(5) And (3) collecting the spherical potassium nitrate particles obtained in the step (4), cooling through a vibrating fluidized bed, conveying to a sieving machine, sieving, conveying to a storage bin, and packaging to obtain finished potassium nitrate particles.
After the potassium nitrate is granulated, the granulating tower is solidified into spherical potassium nitrate particles under the gradient effect from high temperature to low temperature in the tower in the falling process of the potassium nitrate drops in the tower, and meanwhile, the cooling solidification is not needed to be carried out by introducing cold air from the bottom in the falling process of the potassium nitrate particles in the tower, so that the phenomenon that the potassium nitrate particles are easy to break due to the multiple effects of the high temperature of the potassium nitrate particles in the tower and the high wind speed of the cold air in the falling process of the potassium nitrate drops in the tower is avoided, and the granulating is carried out in a rotary mode by rotating the granulator, so that the particles with the size of 0.5-1.0 mm can be prepared, the particles are round and uniform, the consistent charge attraction among the particles is reduced, the contact area among the particles is greatly reduced, the flow property of potassium nitrate products is fundamentally improved, and the caking phenomenon is avoided; meanwhile, the prepared potassium nitrate has compact particles and strong compression resistance, thereby being beneficial to the storage and transportation of finished products and ensuring that the potassium nitrate is very convenient to transport, store and use; the particle size prepared in the same batch is basically consistent, the particle is compact, no holes exist on the surface, the contact area is small, the phenomenon that the product is agglomerated due to moisture absorption can not occur, and meanwhile, the dissolution performance of the finished product is controllable, and the controlled release time is consistent.
The height of the granulation tower is 10-25 m. The traditional high tower construction cost is quite huge, and the tower is low in construction and production, so that the production cost is reduced, and meanwhile, the energy consumption of material conveying is reduced.
In the step (3), the granulating temperature is 330-340 ℃, and the raw materials can be completely melted within the temperature range to obtain liquid potassium nitrate; the particle size of the granulated potassium nitrate reaches 0.5 mm-1.0 mm.
In order to rapidly cool the high-temperature particles collected by the granulation tower, in the step (5), the cooling temperature of the vibrating fluidized bed is 60-70 ℃, and the vibrating fluidized bed is flat, so that the damage of the particles is greatly reduced, and the sufficient solidification of the particles is ensured.
In the step (5), the sieving particle diameter of the sieving machine is 0.2 to 1.0mm. Thereby sieving to obtain potassium nitrate granules with the required particle size.
In the step (2), the heating temperature is 335 to 345 ℃, and the stirring time is 10 to 30 minutes. The powdered potassium nitrate can be more quickly brought into a molten state, and meanwhile, the reaction temperature and the reaction time are controlled, so that part of energy consumption is reduced.
Potassium nitrate granules produced by the granulation process of any one of the preceding claims.
Example 1
Adding powdery potassium nitrate with the purity of 99.0% into a melting heating furnace for heating and melting, continuously stirring, controlling the heating temperature to 330 ℃, stirring for 10min until the raw materials are completely melted to obtain liquid potassium nitrate, conveying the liquid potassium nitrate to the upper part of a granulating tower with the height of 10 meters through a conveying pipeline and heating to 330 ℃ through a high-frequency induction heater, uniformly dispersing and falling the liquid potassium nitrate under the action of a granulating head of the rotating granulator, enabling potassium nitrate liquid drops to fall in the granulating tower with the high temperature, realizing solidification and granulating to form spherical potassium nitrate particles, dropping the spherical potassium nitrate particles into a collecting tank, collecting the spherical potassium nitrate particles, reducing the temperature of the collected spherical potassium nitrate particles to 110 ℃, conveying the spherical potassium nitrate particles to a sieving machine through a vibrating fluidized bed, conveying the sieved particles to a storage bin, and packaging to obtain finished potassium nitrate particles.
Example 2
Adding powdery potassium nitrate with the purity of 99.4% into a melting heating furnace for heating and melting, continuously stirring, controlling the heating temperature to 340 ℃, stirring for 30min until the raw materials are completely melted to obtain liquid potassium nitrate, conveying the liquid potassium nitrate to the upper part of a granulating tower with the height of 10 meters through a conveying pipeline and heating to 330 ℃ through a high-frequency induction heater, uniformly dispersing and falling the liquid potassium nitrate under the action of a granulating head of the rotating granulator, enabling potassium nitrate liquid drops to fall in the granulating tower with the high temperature, realizing solidification and granulating to form spherical potassium nitrate particles, dropping the spherical potassium nitrate particles into a collecting tank, collecting the spherical potassium nitrate particles, reducing the temperature of the collected spherical potassium nitrate particles to 110 ℃, conveying the spherical potassium nitrate particles to a sieving machine through a vibrating fluidized bed, conveying the sieved particles to a storage bin, and packaging to obtain finished potassium nitrate particles.
Example 3
The method comprises the steps of putting powdery potassium nitrate with the purity of 99.7% into a melting heating furnace for heating and melting, continuously stirring, controlling the heating temperature to 360 ℃ and stirring time to 15min until raw materials are completely melted to obtain liquid potassium nitrate, conveying the liquid potassium nitrate to the upper part of a granulating tower with the tower height of 10 meters through a conveying pipeline and heating to 330 ℃ through a high-frequency induction heater, uniformly dispersing and falling the liquid potassium nitrate under the action of a granulating head of the rotating granulator, enabling potassium nitrate liquid drops to fall in the granulating tower with the high temperature, realizing solidification and granulating to form spherical potassium nitrate particles, dropping the spherical potassium nitrate particles into a collecting tank, collecting the spherical potassium nitrate particles, cooling the collected spherical potassium nitrate particles to 65 ℃ through a vibrating fluidized bed, conveying the sieved particles to a storage bin, and packaging to obtain finished potassium nitrate particles.
Example 4
Adding powdery potassium nitrate with the purity of 99.0% into a melting heating furnace for heating and melting, continuously stirring, controlling the heating temperature to 350 ℃, stirring for 20min until the raw materials are completely melted to obtain liquid potassium nitrate, conveying the liquid potassium nitrate to the upper part of a granulating tower with the tower height of 15 meters through a conveying pipeline and heating to a rotating granulator with the temperature of 335 ℃ through a high-frequency induction heater, uniformly dispersing and falling the liquid potassium nitrate under the action of a granulating head of the rotating granulator, enabling potassium nitrate liquid drops to fall in the high-temperature granulating tower, realizing solidification and granulating to form spherical potassium nitrate particles, dropping the spherical potassium nitrate particles into a collecting tank, collecting the collected spherical potassium nitrate particles, reducing the temperature to 64 ℃ through a vibrating fluidized bed, conveying the sieved particles to a storage bin, and packaging to obtain finished potassium nitrate particles.
Example 5
The method comprises the steps of putting powdery potassium nitrate with the purity of 99.4% into a melting heating furnace for heating and melting, continuously stirring, controlling the heating temperature to 355 ℃ and stirring time to 25min until raw materials are completely melted to obtain liquid potassium nitrate, conveying the liquid potassium nitrate to the upper part of a granulating tower with the tower height of 15 meters through a conveying pipeline and heating to a rotating granulator with the temperature of 335 ℃ through a high-frequency induction heater, uniformly dispersing and falling the liquid potassium nitrate under the action of a granulating head of the rotating granulator, enabling potassium nitrate liquid drops to fall in the granulating tower with the temperature of high temperature, realizing solidification to granulate and form spherical potassium nitrate particles, dropping the spherical potassium nitrate particles into a collecting tank, collecting the spherical potassium nitrate particles, cooling the collected spherical potassium nitrate particles to 66 ℃ through a vibrating fluidized bed, conveying the sieved particles to a storage bin, and packaging to obtain finished potassium nitrate particles.
Example 6
Adding powdery potassium nitrate with the purity of 99.7% into a melting heating furnace for heating and melting, continuously stirring, controlling the heating temperature to 360 ℃ and stirring time to 30min until the raw materials are completely melted to obtain liquid potassium nitrate, conveying the liquid potassium nitrate to the upper part of a granulating tower with the tower height of 15m through a conveying pipeline and heating to a rotating granulator with the temperature of 335 ℃ through a high-frequency induction heater, uniformly dispersing and falling the liquid potassium nitrate under the action of a granulating head of the rotating granulator, enabling potassium nitrate liquid drops to fall in the high-temperature granulating tower, realizing solidification and granulating to form spherical potassium nitrate particles, dropping the spherical potassium nitrate particles into a collecting tank, collecting the spherical potassium nitrate particles, cooling the collected spherical potassium nitrate particles to 68 ℃ through a vibrating fluidized bed, conveying the sieved particles to a storage bin, and packaging to obtain finished potassium nitrate particles.
Example 7
The method comprises the steps of putting powdery potassium nitrate with the purity of 99.7% into a melting heating furnace for heating and melting, continuously stirring, controlling the heating temperature to 360 ℃ and stirring time to 10min until raw materials are completely melted to obtain liquid potassium nitrate, conveying the liquid potassium nitrate to the upper part of a granulating tower with the height of 25 meters through a conveying pipeline and heating the liquid potassium nitrate to a rotary granulator with the temperature of 340 ℃ through a high-frequency induction heater, adjusting the rotating speed of the rotary granulator to 80% of normal rotating speed in the embodiment, uniformly dispersing and falling the liquid potassium nitrate under the action of a granulating head of the rotary granulator, enabling potassium nitrate liquid drops to fall in the granulating tower with the temperature of high temperature, realizing solidification to granulate into spherical potassium nitrate particles, collecting the spherical potassium nitrate particles in a collecting tank, cooling the collected spherical potassium nitrate particles to 65 ℃ through a vibrating fluidized bed, conveying the sieved particles to a stock bin, and packaging to obtain finished potassium nitrate particles.
Example 8
The method comprises the steps of putting powdery potassium nitrate with the purity of 99.7% into a melting heating furnace for heating and melting, continuously stirring, controlling the heating temperature to 380 ℃ and stirring time to 30min until raw materials are completely melted to obtain liquid potassium nitrate, conveying the liquid potassium nitrate to the upper part of a granulating tower with the height of 25 meters through a conveying pipeline and heating the liquid potassium nitrate to a rotary granulator with the temperature of 340 ℃ through a high-frequency induction heater, adjusting the rotating speed of the rotary granulator to 50% of the normal rotating speed in the embodiment, uniformly dispersing and falling the liquid potassium nitrate under the action of a granulating head of the rotary granulator, enabling potassium nitrate liquid drops to fall in the granulating tower with the high temperature, forming spherical potassium nitrate particles, collecting the spherical potassium nitrate particles in a collecting tank, cooling the collected spherical potassium nitrate particles to 64 ℃ through a vibrating fluidized bed, conveying the sieved particles to a stock bin, and packaging the sieved particles to obtain finished potassium nitrate particles.
Comparative example
This comparative example differs from example 1 in that: and (3) conveying the liquid potassium nitrate to a granulating ejector, wherein the granulating ejector ejects uniform potassium nitrate liquid drops from the upper part of a high tower, and the liquid drops drop 30-50 m in an airflow with the flow rate of 2-4 m/s from bottom to top to form spherical potassium nitrate particles.
Experimental example 1
The experimental method comprises the following steps: the finished potassium nitrate granules prepared in the experimental groups 1 to 9 were tested by setting examples 1 to 8 and comparative examples as experimental groups 1 to 9, respectively, and the results are shown in table 1:
table 1 Properties of finished Potassium nitrate granules in Experimental groups 1-9
In conclusion, the finished product of the potassium nitrate granules prepared by the method for granulating the potassium nitrate has high purity and low moisture, but compared with the finished product of the potassium nitrate granules prepared by the method for spray granulation in the comparative example, the finished product of the potassium nitrate granules prepared by the method for granulating the potassium nitrate by adopting a rotary drum distributor has the advantages of less granule breakage, uniformity and smoothness, no material returning, almost zero empty shell rate of the product, good product fluidity, high compression resistance, long caking period, convenience for storage and transportation and convenience for use. In examples 7 to 8, the rotational speed of the rotary granulator was reduced, so that the particle size of the granules was increased compared with those in examples 1 to 6, but the particle size of the potassium nitrate granules was still kept substantially uniform, the agglomeration time of the potassium nitrate granules was effectively prolonged, and the storage and transportation of the product were facilitated and the use was convenient. However, the particle breakage rate and the particle empty rate are relatively increased, so that a certain amount of powder is caused, and the production and the appearance of the particles are affected.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (1)
1. The low-tower granulation method of potassium nitrate is characterized by comprising the following steps of:
adding powdery potassium nitrate with the purity of 99.7% into a melting heating furnace for heating and melting, continuously stirring, controlling the heating temperature to 360 ℃ and stirring time to 15min until the raw materials are completely melted to obtain liquid potassium nitrate, conveying the liquid potassium nitrate to the upper part of a granulating tower with the tower height of 10 meters through a conveying pipeline and heating the liquid potassium nitrate to a rotary granulator with the temperature of 330 ℃ through a high-frequency induction heater, uniformly dispersing and falling the liquid potassium nitrate under the action of a granulating head of the rotary granulator, and cooling and solidifying potassium nitrate particles without introducing cold air from the bottom in the falling process of the tower; the method comprises the steps of enabling potassium nitrate drops to fall in a high-temperature granulating tower, realizing solidification, granulating to form spherical potassium nitrate particles, enabling the spherical potassium nitrate particles to fall into a collecting tank, collecting the spherical potassium nitrate particles, enabling the temperature of the collected spherical potassium nitrate particles to be 110 ℃, cooling to 65 ℃ through a flat-plate type vibrating fluidized bed, conveying the spherical potassium nitrate particles to a sieving machine, conveying the sieved particles to a storage bin, and packaging to obtain finished potassium nitrate particles, wherein the particle size of the potassium nitrate particles is 0.6mm, the particle breakage rate is 0.02%, and the particle blank rate is 0.01%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910955036.8A CN112645359B (en) | 2019-10-09 | 2019-10-09 | Potassium nitrate low-tower granulation method and potassium nitrate granules prepared by same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910955036.8A CN112645359B (en) | 2019-10-09 | 2019-10-09 | Potassium nitrate low-tower granulation method and potassium nitrate granules prepared by same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112645359A CN112645359A (en) | 2021-04-13 |
| CN112645359B true CN112645359B (en) | 2023-07-25 |
Family
ID=75342622
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910955036.8A Active CN112645359B (en) | 2019-10-09 | 2019-10-09 | Potassium nitrate low-tower granulation method and potassium nitrate granules prepared by same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112645359B (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1022985C (en) * | 1988-12-17 | 1993-12-08 | 浙江工学院 | Method for preparing spherical ammonia synthesis catalyst by spraying of rotary granulation nozzle |
| CN1213964C (en) * | 2002-10-14 | 2005-08-10 | 深圳市芭田生态工程股份有限公司 | Low-tower molten slurry pelletizing method and apparatus to produce granulated multicomponent composite fertilizer |
| CN100450979C (en) * | 2006-12-05 | 2009-01-14 | 魏贵生 | Full- fusing wind-cooling crystallization granulation method and device for composite fertilizer |
| CN104474969B (en) * | 2014-12-04 | 2016-08-31 | 交城县金兰化工有限公司 | High-temperature molten salt tower granulation method containing potassium nitrate |
| EP3348538A1 (en) * | 2017-01-16 | 2018-07-18 | YARA International ASA | Calcium nitrate and potassium nitrate fertiliser particles |
| 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 |
-
2019
- 2019-10-09 CN CN201910955036.8A patent/CN112645359B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN112645359A (en) | 2021-04-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11365127B2 (en) | Large-particle spherical salt and preparation method thereof | |
| NO153361B (en) | PROCEDURE FOR THE PREPARATION OF GRANULES CONSTRUCTED BY A CORE AND A CAPE | |
| KR20010042784A (en) | Wet granulation method for generating granules | |
| CN104355778A (en) | Potassium fertilizer granules and granulating method thereof | |
| CN112645359B (en) | Potassium nitrate low-tower granulation method and potassium nitrate granules prepared by same | |
| CN104474969B (en) | High-temperature molten salt tower granulation method containing potassium nitrate | |
| NO133872B (en) | ||
| CN109608509B (en) | Continuous preparation method of granular isomalt | |
| CN102838478A (en) | Citric acid monohydrate crystal and production method thereof | |
| CN112194546B (en) | Water suspension granulation method of nickel hydrazine nitrate initiating explosive | |
| CN202527138U (en) | Granulating device for mixture with low softening point of rosin, paraffin and potassium chloride | |
| JPH1192424A (en) | Production of neopentylglycol hydroxypivalate granule, neopentylglycol hydroxypivalate granule, and use of apparatus for granulation of the same | |
| CN102989363A (en) | Preparation method of granular saccharin sodium | |
| CN1205125C (en) | Industrial sodium nitrate new product and its preparation method | |
| JP5063843B2 (en) | Method for dripping granulation of slurry melt and method for producing urea-based composite fertilizer granule using the same | |
| CN113072083A (en) | Preparation method and preparation device of spherical magnesium oxide | |
| US1999873A (en) | Process of preparing zinc chloride melts for granulation | |
| CN1182024C (en) | A kind of manufacturing method of granular sodium nitrite | |
| CN113004081A (en) | Preparation method of instant drying-free round particle potash fertilizer | |
| CN109384251A (en) | A kind of prilling process of potassium nitrate and its potassium nitrate granules of preparation | |
| CN221245038U (en) | Outward spout blue structure and prilling granulator | |
| CN116532042A (en) | Method for producing granular compound fertilizer | |
| CN102962006A (en) | Granulating process of isomaltulose | |
| CN104311232A (en) | Potash fertilizer granulation method and granules thereof | |
| CN221245039U (en) | Granulating device not easy to block |
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 |