CN103833444B - Nitrocalcite magnesium double salt type composite fertilizer and preparation method thereof - Google Patents
Nitrocalcite magnesium double salt type composite fertilizer and preparation method thereof Download PDFInfo
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- CN103833444B CN103833444B CN201410094346.2A CN201410094346A CN103833444B CN 103833444 B CN103833444 B CN 103833444B CN 201410094346 A CN201410094346 A CN 201410094346A CN 103833444 B CN103833444 B CN 103833444B
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Abstract
The present invention relates to the manufacturing technology of granular fertilizers, specifically a kind of nitrocalcite magnesium double salt type composite fertilizer and preparation method thereof, nitrocalcite magnesium double salt type composite fertilizer, in described composite fertilizer, magnesium nitrate and the total mass percent of nitrocalcite are 50 ~ 90%, the mass percent of crystal water is 10 ~ 50%, and the mass ratio of magnesium nitrate and nitrocalcite is 3.5 ~ 0.1:1.Nitrocalcite magnesium double salt type composite fertilizer of the present invention and preparation method thereof has following beneficial effect relative to prior art: (1) nitrocalcite magnesium of the present invention double salt type composite fertilizer, the complex fertilizer product that Diaspora Performance and anti-caking effect obtain more than blending, the granulation of mechanical compaction method is good, the clotting time of product is more than 30 days, and the use for product brings a lot of facilities; (2) preparation method of the present invention is lower than adopting the process costs of intermittent type crystallization again through mechanically mixing and granulation, is also applicable to serialization and produces in enormous quantities, to provide convenience condition to the automatization of technology controlling and process.
Description
Technical field
The present invention relates to the manufacturing technology of granular fertilizers, specifically a kind of nitrocalcite magnesium double salt type composite fertilizer and preparation method thereof.
Background technology
Nitrocalcite and magnesium nitrate are all important water soluble fertilizers for many plants, although calcium magnesium element belongs to moderate-element, also more important than NPK fertilizers for some crops.Wherein, calcium is one of composition forming cell walls, and it can promote that crop young root grows and be formed with root hair, affects the growth of cell; Increase crop to the resistibility of disease and pest, eliminate organic acid too much in plant materials, promote various metabolic process; Calcium can also improve the physical behavior of soil.Magnesium ion is the activator of multiple enzyme, promotes saccharide converted and metabolism in body, and promote the synthesis of fat and protein, oil crops execute magnesium can improve its oleaginousness, and magnesium can also promote that crop is to the absorption of silicon.
Existing nitrocalcite product be mostly granular product containing four crystal water or and the double salt that formed of ammonium nitrate and calcium ammonium nitrate product, transport, use in using enterprise to bring the increase of cost.In use free-running property is poor, manufacturing process be adopt interrupter method, need through long crystallisation by cooling, separation, the production cycle is long, energy consumption and comprehensive cost higher, level of automation is low.In addition, in transport and storage process, often can there is the phenomenon of luming.
Existing magnesium nitrate product is the granular product containing six crystal water mostly, and this magnesium nitrate in use free-running property is poor, and manufacturing process adopts interrupter method, need through long crystallisation by cooling, separation, production cycle is long, energy consumption and comprehensive cost high, level of automation is low.In addition, containing a small amount of free water content, often can there is the phenomenon of luming in crystal grain surface in transport and storage process.
Owing to containing the double salt of nitrocalcite and magnesium nitrate simultaneously, crystallization and granulation difficulty large, up to the present, the water soluble composite fertilizer that market is not also main component with nitrocalcite and magnesium nitrate, the granular fertilizers especially do not prepared by this two kinds of effective constituent melts.
Summary of the invention
The present invention, in order to solve the problem that free-running property is poor, the manufacturing process cycle is long, energy consumption is high of existing granular nitrate calcium and the existence of magnesium nitrate product, provides a kind of nitrocalcite magnesium double salt type composite fertilizer and preparation method thereof.
The present invention is achieved by the following technical solutions: nitrocalcite magnesium double salt type composite fertilizer, in described composite fertilizer, magnesium nitrate and the total mass percent of nitrocalcite are 50 ~ 90%, the mass percent of crystal water is 10 ~ 50%, and the mass ratio of magnesium nitrate and nitrocalcite is 3.5 ~ 0.1:1.
In composite fertilizer of the present invention, magnesium nitrate and the total mass percent of nitrocalcite are 50 ~ 90%, and the mass percent of crystal water is 10 ~ 50%, and aforementioned proportion is according to the crystal water ratio-dependent of stable nitrocalcite and magnesium nitrate crystallization; If crystal water content ratio higher (magnesium nitrate and the total mass percent of nitrocalcite reduce) time, the moisture dissociated will be there is in the mixture, difficulty is brought to granulation, also easily lump simultaneously; As crystal water content is too low, the composite fertilizer obtained has the characteristic absorbing outside moisture, all causes some difficulties to production and use.
Magnesium nitrate in the present invention and the mass ratio of nitrocalcite, if be less than 0.1:1, the ratio for the element of most of farm crop magnesium is not enough, needs to use fertiliser containing magnesium separately, brings the inconvenience of use; If be greater than 3.5:1, on the one hand granulating and forming difficulty, deviate from the required ratio of most of farm crop to calcium constituent and magnesium elements on the other hand, makes troubles to using of fertilizer.
Nitrocalcite magnesium double salt type composite fertilizer of the present invention, except adopting preparation method of the present invention acquisition, also obtains by the method such as fluidized bed prilling or spray granulating.
The preparation method of nitrocalcite magnesium double salt type composite fertilizer, the steps include:
1) be the mixed aqueous solution that 3.5 ~ 0.1:1 prepares magnesium nitrate and nitrocalcite according to the mass ratio of magnesium nitrate and nitrocalcite;
2) magnesium nitrate and nitrocalcite mixed aqueous solution are concentrated into the concentrated solution that total mass concentration is 50 ~ 90%;
3) concentrated solution is delivered in header tank, control the temperature of material in header tank at 85 ~ 130 DEG C, then be the shower nozzle ejection of 0.5 ~ 3.0mm continuously from aperture by material, the drop of ejection in dropping process with the air generation thermal exchange of upwards to carry, cooled and solidified forms spherical or subglobose nitrocalcite magnesium double salt type complex fertilizer product.
The equipment adopted in preparation method of the present invention is melt slime granulating composite fertilizer device, is structure known in this field.
Step 2 of the present invention) in concentrated can adopt concentration technology well known in the art, such as mixed aqueous solution is sent into vaporizer.
Can obtain magnesium nitrate according to preparation method of the present invention and the total mass percent of nitrocalcite is 50 ~ 90%, the mass percent of crystal water is the double salt type composite fertilizer of 10 ~ 50%.
Adopt preparation method of the present invention, the performances such as its obtained complex fertilizer product hardness and clotting time, more excellent relative to other preparation methods.
Other droplets fall Distance geometry air velocity is adopted in step 3) of the present invention, but the air velocity of the droplets fall of 30 ~ 110m of the present invention distance and 0.1 ~ 1.0m/s, consider equipment manufacturing cost and product effect and preferred parameter, as too high in droplets fall distance, correspondingly prilling tower cost increases substantially, the material of production link transports cost and can increase substantially, also be disadvantageous to production safety simultaneously, droplets fall distance is too little, have little time to form hard particle, the quality product obtained declines, there will be particle agglomeration serious time even cannot the situation of granulation.Air velocity of the present invention is that time of needing according to droplets fall process and atmospheric heat clearing house and thermal exchange speed are determined, air velocity is fast, the heat taken away is just many, the output increased of product, the sphericity of particle improves, simultaneously due to air buoyancy effect, fall time extends, better to the cooling performance of particle.When air velocity is less than 0.1m/s, in drop cooling dropping process, heat exchange coefficient significantly declines, and particle sphericity declines, and the Quality and yield of product all declines.When air velocity is higher than 1.0m/s, energy consumption increases substantially, and can increase manufacturing cost, uneconomical.
Nitrocalcite magnesium double salt type composite fertilizer of the present invention and preparation method thereof has following beneficial effect relative to prior art:
(1) nitrocalcite magnesium double salt type composite fertilizer of the present invention, the complex fertilizer product that Diaspora Performance and anti-caking effect obtain more than blending, the granulation of mechanical compaction method is good, and the clotting time of product is more than 30 days, and the use for product brings a lot of facilities;
(2) preparation method of the present invention is lower than adopting the process costs of intermittent type crystallization again through mechanically mixing and granulation, is also applicable to serialization and produces in enormous quantities, to provide convenience condition to the automatization of technology controlling and process;
(3) the nitrocalcite magnesium double salt type composite fertilizer of the present invention product particle hardness of producing than additive method is high, and particle fracturing strengh is greater than 50N, is not easy to break in aftertreatment or transportation;
(4) nitrocalcite magnesium double salt type composite fertilizer of the present invention have good water-soluble, easy to use, irrigation conduit shower nozzle can not be blocked, be applicable to all fertilization systems; Not chloride ion-containing, can safely use in various crop, long-term application also can not cause the acidifying of soil, harden.
Embodiment
embodiment 1
The preparation method of nitrocalcite magnesium double salt type composite fertilizer, the steps include:
1) be the mixed aqueous solution that 3.5:1 prepares magnesium nitrate and nitrocalcite according to the mass ratio of magnesium nitrate and nitrocalcite;
2) magnesium nitrate and nitrocalcite mixed aqueous solution are concentrated into the concentrated solution that total mass concentration is 75%;
3) concentrated solution is delivered in header tank, control the temperature of material in header tank at 100 DEG C, then be the shower nozzle ejection of 2.5mm continuously from aperture by material, the drop of ejection in dropping process with the air generation thermal exchange of upwards to carry, cooled and solidified forms spherical or subglobose nitrocalcite magnesium double salt type complex fertilizer product.
The droplets fall distance sprayed in step 3) is 30m, and the air velocity of upwards carrying is 0.2m/s.
The nitrocalcite magnesium double salt type complex fertilizer product diameter obtained is substantially within the scope of 0.5 ~ 5.0mm, and median size is 2.8mm, and spherical rate is greater than 95%, and in product, the total content of magnesium nitrate and nitrocalcite is 75%, and all the other components are crystal water.
embodiment 2
The preparation method of nitrocalcite magnesium double salt type composite fertilizer, the steps include:
1) be the mixed aqueous solution that 0.67:1 prepares magnesium nitrate and nitrocalcite according to the mass ratio of magnesium nitrate and nitrocalcite;
2) magnesium nitrate and nitrocalcite mixed aqueous solution are concentrated into the concentrated solution that total mass concentration is 66%;
3) concentrated solution is delivered in header tank, control the temperature of material in header tank at 130 DEG C, then be the shower nozzle ejection of 0.5mm continuously from aperture by material, the drop of ejection in dropping process with the air generation thermal exchange of upwards to carry, cooled and solidified forms spherical or subglobose nitrocalcite magnesium double salt type complex fertilizer product.
The droplets fall distance sprayed in step 3) is 80m, and the air velocity of upwards carrying is 0.5m/s.
The nitrocalcite magnesium double salt type complex fertilizer product diameter obtained is substantially within the scope of 0.5 ~ 5.0mm, and median size is 3.3mm, and spherical rate is greater than 95%, and in product, the total content of magnesium nitrate and nitrocalcite is 66%, and all the other components are crystal water.
embodiment 3
The preparation method of nitrocalcite magnesium double salt type composite fertilizer, the steps include:
1) be the mixed aqueous solution that 2.0:1 prepares magnesium nitrate and nitrocalcite according to the mass ratio of magnesium nitrate and nitrocalcite;
2) magnesium nitrate and nitrocalcite mixed aqueous solution are concentrated into the concentrated solution that total mass concentration is 50%;
3) concentrated solution is delivered in header tank, control the temperature of material in header tank at 120 DEG C, then be the shower nozzle ejection of 3.0mm continuously from aperture by material, the drop of ejection in dropping process with the air generation thermal exchange of upwards to carry, cooled and solidified forms spherical or subglobose nitrocalcite magnesium double salt type complex fertilizer product.
The droplets fall distance sprayed in step 3) is 110m, and the air velocity of upwards carrying is 0.1m/s.
The nitrocalcite magnesium double salt type complex fertilizer product diameter obtained is substantially within the scope of 0.5 ~ 5.0mm, and median size is 2.6mm, and spherical rate is greater than 95%, and in product, the total content of magnesium nitrate and nitrocalcite is 50%, and all the other components are crystal water.
embodiment 4
The preparation method of nitrocalcite magnesium double salt type composite fertilizer, the steps include:
1) be the mixed aqueous solution that 0.1:1 prepares magnesium nitrate and nitrocalcite according to the mass ratio of magnesium nitrate and nitrocalcite;
2) magnesium nitrate and nitrocalcite mixed aqueous solution are concentrated into the concentrated solution that total mass concentration is 90%;
3) concentrated solution is delivered in header tank, control the temperature of material in header tank at 85 DEG C, then be the shower nozzle ejection of 1.0mm continuously from aperture by material, the drop of ejection in dropping process with the air generation thermal exchange of upwards to carry, cooled and solidified forms spherical or subglobose nitrocalcite magnesium double salt type complex fertilizer product.
The droplets fall distance sprayed in step 3) is 60m, and the air velocity of upwards carrying is 1.0m/s.
The nitrocalcite magnesium double salt type complex fertilizer product diameter obtained is substantially within the scope of 0.5 ~ 5.0mm, and median size is 2.8mm, and spherical rate is greater than 95%, and in product, the total content of magnesium nitrate and nitrocalcite is 90%, and all the other components are crystal water.
Claims (1)
1. nitrocalcite magnesium double salt type composite fertilizer, is characterized in that, in described composite fertilizer, magnesium nitrate and the total mass percent of nitrocalcite are 50 ~ 90%, and the mass percent of crystal water is 10 ~ 50%, and the mass ratio of magnesium nitrate and nitrocalcite is 3.5 ~ 0.1:1; The step of described composite fertilizer preparation method is:
1) be the mixed aqueous solution that 3.5 ~ 0.1:1 prepares magnesium nitrate and nitrocalcite according to the mass ratio of magnesium nitrate and nitrocalcite;
2) magnesium nitrate and nitrocalcite mixed aqueous solution are concentrated into the concentrated solution that total mass concentration is 50 ~ 90%;
3) concentrated solution is delivered in header tank, control the temperature of material in header tank at 85 ~ 130 DEG C, then be the shower nozzle ejection of 0.5 ~ 3.0mm continuously from aperture by material, the drop of ejection in dropping process with the air generation thermal exchange of upwards to carry, cooled and solidified forms spherical or subglobose nitrocalcite magnesium double salt type complex fertilizer product, the droplets fall distance sprayed in step 3) is 30 ~ 110m, and the air velocity of upwards carrying is 0.1 ~ 1.0m/s.
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Families Citing this family (8)
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|---|---|---|---|---|
| CN104725098B (en) * | 2015-03-20 | 2017-08-29 | 路永宽 | The method of steel band granulation production full water-soluble ammonium nitrate calcium and magnesium |
| CN104744100B (en) * | 2015-03-20 | 2017-08-11 | 路永宽 | The method that disc granulation produces full water-soluble ammonium nitrate calcium and magnesium |
| CN105601345A (en) * | 2015-12-25 | 2016-05-25 | 贵州芭田生态工程有限公司 | Method for preparing calcium nitrate and magnesium fertilizer from coarse calcium nitrate as by-product of nitrophosphate fertilizer |
| CN106915976A (en) * | 2015-12-25 | 2017-07-04 | 贵州芭田生态工程有限公司 | The method that the nitric acid ca and mg fertilizer of zinc-rich is prepared using nitrophosphate fertilizer accessory substance calcium nitrate |
| CN107586160A (en) * | 2016-07-06 | 2018-01-16 | 贵州芭田生态工程有限公司 | Rich calcium Chemical Mixed Fertilizer and preparation method thereof |
| CN107602160A (en) * | 2017-10-24 | 2018-01-19 | 交城县金兰化工有限公司 | A kind of tower granulation method of low melting point fused salt |
| CN113620325A (en) * | 2020-05-07 | 2021-11-09 | 交城县田丰肥业有限公司 | Method for producing calcium magnesium nitrate in shape of popcorn by using dolomite |
| CN114213174A (en) * | 2021-12-31 | 2022-03-22 | 山西卓联锐科科技有限公司 | Calcium nitrate magnesium fertilizer and preparation method thereof |
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| CN1204309A (en) * | 1995-10-27 | 1999-01-06 | 挪威海德罗公司 | Method for making nitrogen-potassium fertilizer containing calcium nitrate and products thereof |
| CN102320885A (en) * | 2011-08-17 | 2012-01-18 | 交城县金兰化工有限公司 | Spherical magnesium nitrate and tower granulation method thereof |
| CN102491846A (en) * | 2011-12-07 | 2012-06-13 | 陈忠慧 | Calcium-magnesium compound fertilizer, and preparation method and application method thereof |
| CN103086785A (en) * | 2011-10-31 | 2013-05-08 | 山西省交城红星化工有限公司 | Nitrate state enzyme fertilizer preparation technology |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1204309A (en) * | 1995-10-27 | 1999-01-06 | 挪威海德罗公司 | Method for making nitrogen-potassium fertilizer containing calcium nitrate and products thereof |
| CN102320885A (en) * | 2011-08-17 | 2012-01-18 | 交城县金兰化工有限公司 | Spherical magnesium nitrate and tower granulation method thereof |
| CN103086785A (en) * | 2011-10-31 | 2013-05-08 | 山西省交城红星化工有限公司 | Nitrate state enzyme fertilizer preparation technology |
| CN102491846A (en) * | 2011-12-07 | 2012-06-13 | 陈忠慧 | Calcium-magnesium compound fertilizer, and preparation method and application method thereof |
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Inventor after: Lin Xiangqian Inventor after: Li Hong Inventor after: Lin Xiangguang Inventor after: Guo Changchun Inventor after: Wei Yanhong Inventor after: Song Xiaoming Inventor after: Zhao Heping Inventor before: Lin Xiangqian Inventor before: Lin Xiangguang Inventor before: Guo Changchun Inventor before: Wei Yanhong Inventor before: Song Xiaoming Inventor before: Zhao Heping |
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Address after: 030599 Yiwang Village, Xiajiaying Town, Jiaocheng County, Luliang City, Shanxi Province Patentee after: Shanxi Jinlan Chemical Co., Ltd. Address before: 030599 Yiwang Village, Xiajiaying Town, Jiaocheng County, Luliang City, Shanxi Province Patentee before: Jiaocheng Knlan Chemical Co., Ltd. |
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Effective date of registration: 20210317 Address after: 030500 No.02, West Meijin Road, Jiaocheng Economic Development Zone, Luliang City, Shanxi Province Patentee after: Shanxi Dongjin fertilizer Co.,Ltd. Address before: 030599 Yiwang Village, Xiajiaying Town, Jiaocheng County, Luliang City, Shanxi Province Patentee before: Shanxi Jinlan Chemical Co.,Ltd. |
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