CN103833444A - Magnesium nitrate-calcium nitrate complex salt type compound fertilizer and preparation method thereof - Google Patents
Magnesium nitrate-calcium nitrate complex salt type compound fertilizer and preparation method thereof Download PDFInfo
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- CN103833444A CN103833444A CN201410094346.2A CN201410094346A CN103833444A CN 103833444 A CN103833444 A CN 103833444A CN 201410094346 A CN201410094346 A CN 201410094346A CN 103833444 A CN103833444 A CN 103833444A
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Abstract
The invention relates to the production technology of granular fertilizers, and specifically relates to a magnesium nitrate-calcium nitrate complex salt type compound fertilizer and a preparation method thereof. The magnesium nitrate-calcium nitrate complex salt type compound fertilizer is characterized in that the total mass percent of magnesium nitrate and calcium nitrate in the compound fertilizer ranges from 50% to 90%, the mass percent of crystal water in the compound fertilizer ranges from 10% to 50%, and the mass ratio of magnesium nitrate to calcium nitrate is (3.5-0.1):1. Compared with the prior art, the magnesium nitrate-calcium nitrate complex salt type compound fertilizer and the preparation method thereof have the beneficial effects that (1) the magnesium nitrate-calcium nitrate complex salt type compound fertilizer is far better than compound fertilizers obtained by doping and pelletizing by a mechanical pressing method in free-running property and anti-caking property, the caking time of the product is above 30 days and therefore, the product can be used very conveniently; (2) the preparation method is lower in cost than a process of batch crystallization as well as mechanical mixing and pelletizing, and also applicable to continuous large-batch production, and therefore, a convenient condition is provided for automatic process control.
Description
Technical field
The present invention relates to the manufacturing technology of particulate state fertilizer, 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 the growth of crop young root and root hair to form, and affects the growth of cell; Increase the resistibility of crop to disease and pest, eliminate too much organic acid in plant materials, promote various metabolic processes; Calcium can also improve the physical behavior of soil.Magnesium ion is the activator of plurality of enzymes, promotes that in body, carbohydrate transforms and metabolism, promotes the synthetic of fat and protein, and oil crops are executed magnesium can improve its oleaginousness, and magnesium can also promote the absorption of crop to silicon.
Existing nitrocalcite product be mostly the granular product that contains four crystal water or and the double salt that forms of ammonium nitrate be calcium ammonium nitrate product, in transport, use in to the increase that uses enterprise to bring cost.In use free-running property is poor, and manufacturing process is to adopt interrupter method, need to pass through long crystallisation by cooling, separation, and the production cycle is long, and energy consumption and comprehensive cost are higher, and level of automation is low.In addition in transport and storage process, often can there is, the phenomenon of caking.
Existing magnesium nitrate product is the granular product that contains six crystal water mostly, and this magnesium nitrate in use free-running property is poor, and manufacturing process is to adopt interrupter method, need to pass through long crystallisation by cooling, separation, production cycle is long, and energy consumption and comprehensive cost are high, and level of automation is low.In addition, a small amount of free water content is contained on crystal grain surface, and the phenomenon of caking often can occur in transport and storage process.
Owing to containing the double salt of nitrocalcite and magnesium nitrate simultaneously, crystallization and granulation difficulty are large, up to the present, the water soluble composite fertilizer taking nitrocalcite and magnesium nitrate as main component not also on market, the particulate state fertilizer of especially being prepared by these two kinds of effective constituent melts.
Summary of the invention
The problem that free-running property is poor, the manufacturing process cycle is long, energy consumption is high that the present invention exists in order to solve existing granular nitrocalcite and 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, the total mass percent of magnesium nitrate and nitrocalcite is 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, the total mass percent of magnesium nitrate and nitrocalcite is 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 when high (magnesium nitrate and nitrocalcite total mass percent reduce), will occur free moisture again in mixture, granulation is brought to difficulty, simultaneously also easy caking; As too low in crystal water content, the composite fertilizer obtaining has the characteristic that absorbs extraneous moisture, all causes some difficulties to producing and using.
Magnesium nitrate in the present invention and the mass ratio of nitrocalcite, if be less than 0.1:1, for the ratio deficiency of the element of most of farm crop magnesium, need to use separately fertiliser containing magnesium, the inconvenience that brings use; If be greater than 3.5:1, granulating and forming difficulty, has departed from the required ratio of most of farm crop to calcium constituent and magnesium elements on the other hand on the one hand, and using of fertilizer made troubles.
Nitrocalcite magnesium double salt type of the present invention composite fertilizer, except adopting preparation method of the present invention obtains, also can obtain by methods such as fluidized bed prilling or spray granulatings.
The preparation method of nitrocalcite magnesium double salt type composite fertilizer, the steps include:
1) according to the mass ratio of magnesium nitrate and nitrocalcite be the mixed aqueous solution of 3.5～0.1:1 preparation magnesium nitrate and nitrocalcite;
2) magnesium nitrate and nitrocalcite mixed aqueous solution are concentrated into total mass concentration than the concentrated solution that 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, ejection drop in dropping process with upwards carry air generation thermal exchange, cooled and solidified forms spherical or subglobose nitrocalcite magnesium double salt type complex fertilizer product.
The equipment adopting 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, for example mixed aqueous solution is sent into vaporizer.
Can make magnesium nitrate and the total mass percent of nitrocalcite is 50 ~ 90%, the double salt type composite fertilizer that the mass percent of crystal water is 10 ~ 50% according to preparation method of the present invention.
Adopt preparation method of the present invention, the performance such as complex fertilizer product hardness and caking time that it makes, more excellent with respect to other preparation methods.
In step 3) of the present invention, adopt other droplets fall distance and air velocity all can, but the air velocity of the droplets fall of 30～110m of the present invention distance and 0.1～1.0m/s, to 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 obtaining declines, situation that even cannot granulation while there will be particle agglomeration serious.Air velocity of the present invention was determined according to droplets fall process and needed time of air thermal exchange and thermal exchange speed, air velocity is fast, the heat of taking away is just many, the output of product improves, the sphericity of particle improves, due to air buoyancy effect, fall time extends, better to the cooling performance of particle simultaneously.When air velocity is less than 0.1m/s, in the cooling dropping process of drop, thermal exchange efficiency significantly declines, and particle sphericity declines, and the Quality and yield of product all declines.Air velocity is during higher than 1.0m/s, and energy consumption increases substantially, and can increase manufacturing cost, uneconomical.
Nitrocalcite magnesium double salt type of the present invention composite fertilizer and preparation method thereof has following beneficial effect with respect to prior art:
(1) nitrocalcite magnesium double salt type of the present invention 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, and the caking time of product is more than 30 days, for the use of product brings a lot of facilities;
(2) preparation method of the present invention is lower than adopting intermittent type crystallization to pass through the process costs of mechanically mixing and granulation again, is also applicable to serialization and produces in enormous quantities, to the automatization of the technology controlling and process condition of providing convenience;
(3) the product particle hardness that nitrocalcite magnesium double salt type of the present invention composite fertilizer produces than additive method is high, and particle pressure break intensity is greater than 50N, is not easy to break in aftertreatment or transportation;
(4) nitrocalcite magnesium double salt type of the present invention composite fertilizer have good water-soluble, easy to use, can not stop up irrigation conduit shower nozzle, be applicable to all fertilization systems; Not chloride ion-containing, can safely use in various crops, long-term application also can not cause soil acidifying, harden.
Embodiment
embodiment 1
The preparation method of nitrocalcite magnesium double salt type composite fertilizer, the steps include:
1) according to the mass ratio of magnesium nitrate and nitrocalcite be the mixed aqueous solution of 3.5:1 preparation magnesium nitrate and nitrocalcite;
2) magnesium nitrate and nitrocalcite mixed aqueous solution are concentrated into total mass concentration than the concentrated solution that 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, ejection drop in dropping process with upwards carry air generation thermal exchange, cooled and solidified forms spherical or subglobose nitrocalcite magnesium double salt type complex fertilizer product.
The droplets fall distance spraying 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 obtaining 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) according to the mass ratio of magnesium nitrate and nitrocalcite be the mixed aqueous solution of 0.67:1 preparation magnesium nitrate and nitrocalcite;
2) magnesium nitrate and nitrocalcite mixed aqueous solution are concentrated into total mass concentration than the concentrated solution that 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, ejection drop in dropping process with upwards carry air generation thermal exchange, cooled and solidified forms spherical or subglobose nitrocalcite magnesium double salt type complex fertilizer product.
The droplets fall distance spraying 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 obtaining 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) according to the mass ratio of magnesium nitrate and nitrocalcite be the mixed aqueous solution of 2.0:1 preparation magnesium nitrate and nitrocalcite;
2) magnesium nitrate and nitrocalcite mixed aqueous solution are concentrated into total mass concentration than the concentrated solution that 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, ejection drop in dropping process with upwards carry air generation thermal exchange, cooled and solidified forms spherical or subglobose nitrocalcite magnesium double salt type complex fertilizer product.
The droplets fall distance spraying 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 obtaining 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) according to the mass ratio of magnesium nitrate and nitrocalcite be the mixed aqueous solution of 0.1:1 preparation magnesium nitrate and nitrocalcite;
2) magnesium nitrate and nitrocalcite mixed aqueous solution are concentrated into total mass concentration than the concentrated solution that 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, ejection drop in dropping process with upwards carry air generation thermal exchange, cooled and solidified forms spherical or subglobose nitrocalcite magnesium double salt type complex fertilizer product.
The droplets fall distance spraying 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 obtaining 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 (3)
1. nitrocalcite magnesium double salt type composite fertilizer, is characterized in that, in described composite fertilizer, the total mass percent of magnesium nitrate and nitrocalcite is 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.
2. the preparation method of nitrocalcite magnesium double salt type as claimed in claim 1 composite fertilizer, is characterized in that, the steps include:
1) according to the mass ratio of magnesium nitrate and nitrocalcite be the mixed aqueous solution of 3.5 ~ 0.1:1 preparation magnesium nitrate and nitrocalcite;
2) magnesium nitrate and nitrocalcite mixed aqueous solution are concentrated into total mass concentration than the concentrated solution that 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, ejection drop in dropping process with upwards carry air generation thermal exchange, cooled and solidified forms spherical or subglobose nitrocalcite magnesium double salt type complex fertilizer product.
3. the preparation method of nitrocalcite magnesium double salt type according to claim 2 composite fertilizer, is characterized in that, the droplets fall distance spraying in step 3) is 30～110m, and the air velocity of upwards carrying is 0.1～1.0m/s.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104725098A (en) * | 2015-03-20 | 2015-06-24 | 路永宽 | Method for producing all-water-soluble calcium ammonium magnesium nitrate by steel strip granulation |
| CN104744100A (en) * | 2015-03-20 | 2015-07-01 | 路永宽 | Method for full water-soluble calcium and magnesium ammonium nitrate by disc granulation |
| 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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| 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 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104725098A (en) * | 2015-03-20 | 2015-06-24 | 路永宽 | Method for producing all-water-soluble calcium ammonium magnesium nitrate by steel strip granulation |
| CN104744100A (en) * | 2015-03-20 | 2015-07-01 | 路永宽 | Method for full water-soluble calcium and magnesium ammonium nitrate by disc granulation |
| 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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| CN103833444B (en) | 2016-03-23 |
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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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