CN101759478B - Preparation method of compound fertilizer - Google Patents
Preparation method of compound fertilizer Download PDFInfo
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- CN101759478B CN101759478B CN200910260067A CN200910260067A CN101759478B CN 101759478 B CN101759478 B CN 101759478B CN 200910260067 A CN200910260067 A CN 200910260067A CN 200910260067 A CN200910260067 A CN 200910260067A CN 101759478 B CN101759478 B CN 101759478B
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- ammonium nitrate
- monoammonium phosphate
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Abstract
The invention provides a preparation method of a compound fertilizer, which comprises the following steps of: (a) fusing ammonium nitrate and heating monoammonium phosphate, potassium chloride and filler; (b) mixing the fused ammonium nitrate, the heated monoammonium phosphate and the filler; (c) granulating and cooling the mixed material; (d) screening the cooled material; and (e) re-cooling and conditioning the screened material. The preparation method of the compound fertilizer carries out the production by adopting fused ammonium nitrate and powdery monoammonium phosphate, omits devices for ammonium nitrate, phosphoric acid, synthetic ammonia and the like and has simple process flow and small investment scale. The prepared each fertilizer granule contains uniform nutrient and is suitable for mechanical fertilization.
Description
Technical field
The present invention relates to field of fertilizer production, be specifically related to the preparation method of compound manure.
Background technology
Compound manure is meant the chemical fertilizer that contains nitrogen, phosphorus, potassium three elements simultaneously or only contain wherein any two kinds of key elements.It has overcome traditional straight fertilizer (only containing wherein a kind of chemical fertilizer of key element of nitrogen, phosphorus, potassium) single shortcoming of content, can how much filling a prescription according to N-P-K content in the soil of different areas.
A kind of compound manure contains three kinds of elements of nitrogen phosphorus potassium simultaneously; Raw material comprises: an ammonium nitrate (containing nitric nitrogen, ammonium nitrogen); Monoammonium phosphate (containing ammonium nitrogen, water-soluble phosphorus, citric acid soluble phosphorus), Repone K (containing magnesium chloride simultaneously), additive (trace elements such as calcic, iron, sulphur); Borax (boracic), additive and borax are called filler.
This compound manure contains quick-acting phosphorus and slow property phosphorus simultaneously because contain the molten phosphorus of water-soluble phosphorus and Chinese holly simultaneously, can be by the crop rapid absorption, and can make base fertilizer; Contain nitric nitrogen, ammonium nitrogen simultaneously, can improve the crop and fruit quality, make cash crop such as vegetables, fruit best in quality; Contain the required various middle trace element of crop, comprehensive yield increase effect is arranged.
But the present production technique of this compound manure is to adopt nitric acid to add the explained hereafter of phosphoric acid, gas ammonia, and requiring must supportingly have devices such as nitric acid, phosphoric acid and synthetic ammonia, and scale of investment is had relatively high expectations.
Summary of the invention
The problem that the present invention solves is to provide a kind of preparation method of compound manure, does not need devices such as supporting nitric acid, phosphoric acid and synthetic ammonia, and technical process is simple, and scale of investment is little.
In order to solve the problems of the technologies described above, technical scheme of the present invention is:
A kind of preparation method of compound manure comprises:
A) with an ammonium nitrate fusion, with monoammonium phosphate, Repone K, filler heating;
B) with an ammonium nitrate after the fusion with the heating after monoammonium phosphate, Repone K and filler mix;
C) mixed material is carried out the granulation postcooling;
D) cooled material is sieved;
E) nurse one's health after the material after will sieving cools off once more.
As preferably, also comprise before the said step a) raw material an ammonium nitrate, monoammonium phosphate, Repone K are carried out fragmentation, screening and metering respectively, and filler is measured.
As preferably, an ammonium nitrate fused temperature is 180 ℃～185 ℃ in the said step a).
As preferably, the temperature of monoammonium phosphate heating is 50 ℃～70 ℃ in the said step a).
As preferably, the temperature of Repone K and filler heating is 90 ℃～110 ℃ in the said step a).
As preferably; In the said step b) monoammonium phosphate, Repone K and filler after an ammonium nitrate after the fusion and the heating are mixed and be specially; Earlier with an ammonium nitrate after the fusion with heat after monoammonium phosphate carry out the first step and mix, mixed then material carries out the second stage with the mixture of Repone K and filler again to be mixed.
As preferably, said first step blended temperature is 150 ℃～165 ℃.
As preferably, said second stage blended temperature is 150 ℃～160 ℃.
As preferably, in the said step d) cooled material is sieved to particle diameter is gone out less than 1mm with greater than the material screening of 4.75mm, and be back to the second stage and mix; Particle diameter gets into step e) more than or equal to 1mm and smaller or equal to the material of 4.75mm.
As preferably, said step e) also comprises sieves cooled material once more once more.
The technology that the preparation method of compound manure provided by the invention adopts an ammonium nitrate fusion to add powdery monoammonium phosphate is produced; Save devices such as nitric acid, phosphoric acid and synthetic ammonia; Technical process is simple; Scale of investment is little, all contains the nutrient of homogeneous in the fertile particle of every granulation of preparing, is fit to mechanized application.
Description of drawings
Fig. 1 is preparation technology's schema of the compound manure that the specific embodiment of the invention provided.
Embodiment
In order further to understand the present invention, below in conjunction with embodiment the preferred embodiment of the invention is described, describe just to further specifying feature and advantage of the present invention but should be appreciated that these, rather than to the restriction of claim of the present invention.
Please refer to Fig. 1, Fig. 1 is preparation technology's schema of the compound manure that the specific embodiment of the invention provided.The preparation method of compound manure provided by the invention is:
1) as preferred, at first each raw material is carried out pre-treatment, comprise fragmentation, screening and metering.Raw material an ammonium nitrate is dropped into bucket elevator through hopper; Be transported to vibratory screening apparatus; Caking an ammonium nitrate after bolting is through crusher in crushing, and the diffusing shape an ammonium nitrate after the fragmentation is transported to vibratory screening apparatus by bucket elevator again, and tiny diffusing shape an ammonium nitrate gets into metering system again and measures below vibratory screening apparatus.Raw material monoammonium phosphate, Repone K all get into metering system through handling the back with the identical operation of an ammonium nitrate.
Filler through metering preferably with through the Repone K that measures mixes, and carries out the metering second time together, and filler is the mixture of additive and borax, comprises trace elements such as calcium, iron, sulphur in the additive.The metering of every kind of raw material is that system carries out automatic continuous measuring according to every kind of proportion of raw materials of input computer, and every kind of raw material after metering is promoted to hundred meters high high top of tower more respectively through the special-purpose lift technique up to hundred meters.
2) after metering an ammonium nitrate gets into special-purpose fusion apparatus, and the temperature of fusion tank preferably is controlled at 180 ℃～185 ℃, when the temperature to 179 of an ammonium nitrate ℃, begins fusion.Simultaneously, after metering monoammonium phosphate is heated with powder heater, the temperature of heating is preferably 50 ℃～70 ℃.
Heat mixing and also sending in the powder heater through the Repone K after the metering for the second time and filler, the temperature of heating is preferably 90 ℃～110 ℃.Because an ammonium nitrate fused temperature is higher, an ammonium nitrate be liquid state during fusion, and pulverous filler is not suitable for mixing with an ammonium nitrate, and the Heating temperature of monoammonium phosphate is lower, so filler is the most suitable mixes with Repone K.
3) with an ammonium nitrate after the fusion with the heating after monoammonium phosphate, Repone K and filler mix.Because an ammonium nitrate is prone to blast when molten state, monoammonium phosphate has the performance that stops an ammonium nitrate blast, and Repone K then can promote blast to take place, and therefore carries out as preferably mixed processes being divided into two-stage, avoids the generation of negative reaction.Be specially earlier with an ammonium nitrate after the fusion with heat after monoammonium phosphate carry out the first step and mix; First step mixing temperature is preferably 150 ℃～165 ℃; Mixed then material carries out the second stage with the mixture of Repone K and filler again to be mixed, and second stage mixing temperature is preferably 150 ℃～160 ℃.
4) suspension liquid with mixed material carries out granulation; Can adopt the differential type tablets press; High-temp liquid has promptly become uniform drop after granulation, freely fall naturally cooling in dropping process and solidify, form smooth in appearance, mellow and full material again from 80 meters high-altitude.
5) fall to tower at the bottom of cooled material be delivered to screening plant through travelling belt; Material is sieved according to size; Particle diameter all is sized out less than 1mm with greater than the particle of 4.75mm; After crusher in crushing, get into second stage mixed processes more again greater than the particle of 4.75mm, carry out granulation more again with after the mixing of materials with fine particle less than 1mm.
6) with particle diameter more than or equal to 1mm and send into refrigerating unit smaller or equal to the material of 4.75mm and cool off once more, nursing one's health processing then promptly becomes compound manure.Because cooled material can produce fine powder once more, therefore need once sieve again as preferred cooled once more material, the material that particle diameter is qualified is just nursed one's health processing.
Embodiment:
The weight percent prescription of the compound manure of preparation is: an ammonium nitrate 43%, and monoammonium phosphate 28%, Repone K 25.7%, additive 2.7%, borax 0.6% in the computer with above each weight percent input metering system, prepares according to this proportioning.
The temperature of fusion tank is set to 182 ℃, and the temperature of monoammonium phosphate heating unit is set at 60 ℃, and the temperature of Repone K heating unit is set at 100 ℃, and first step mixing temperature is 155 ℃, and second stage mixing temperature is 155 ℃.
Comparative Examples 1:
The compound manure of identical proportioning among preparation and the embodiment; The temperature of fusion tank is set to 175 ℃, and the temperature of monoammonium phosphate heating unit is set at 50 ℃, and the temperature of Repone K heating unit is set at 90 ℃; First step mixing temperature is 150 ℃, and second stage mixing temperature is 150 ℃.
Comparative Examples 2:
The compound manure of identical proportioning among preparation and the embodiment; The temperature of fusion tank is set to 188 ℃, and the temperature of monoammonium phosphate heating unit is set at 70 ℃, and the temperature of Repone K heating unit is set at 110 ℃; First step mixing temperature is 158 ℃, and second stage mixing temperature is 158 ℃.
Comparative Examples 3:
The compound manure of identical proportioning among preparation and the embodiment; The temperature of fusion tank is set to 183 ℃, and the temperature of monoammonium phosphate heating unit is set at 60 ℃, and the temperature of Repone K heating unit is set at 100 ℃; First step mixing temperature is 164 ℃, and second stage mixing temperature is 164 ℃.
The phenomenon of observation in the preparation process compares, and the result is as shown in table 1:
The condition of production under the different preparation conditions of table 1 relatively
| Preparation condition | The material reaction situation | The granulation situation |
| Comparative Examples 1 | Strong negative reaction does not take place in material. | Material viscosity is big, and is mobile poor, and the shower nozzle operation was promptly stopped up in 40 minutes, and particle is flat after the granulation. |
| Comparative Examples 2 | Higher because of melt temperature, material promptly begins to smoke clogging in fusion tank. | Smoke clogging because of fusion tank, stop into grain, tablets press does not have material. |
| Comparative Examples 3 | Normally fusion in fusion tank, too high because of mixing temperature, material begins to smoke clogging in tempering tank. | Smoke clogging because of tempering tank, stop into grain, tablets press does not have material. |
| Embodiment | The all no abnormal reaction of material in fusion tank and the tempering tank has only the little ammonia flavor to overflow the normal volatilization when belonging to high-temperature fusion. | Material fluidity is better, and (all belonging to impurity stops up) found that latch up phenomenon was arranged in 8 hours in tablets press operation, during granulation even, particle is mellow and full, produces normal. |
Can see that the mixing temperature of melt temperature and material is lower in the Comparative Examples 1, even melt temperature is less than 180 ℃; Be lower than preferred temperature, lower temperature causes material viscosity to increase mobile step-down; Bring difficulty for the granulation of postorder, very easily stop up tablets press, the particle after the granulation is flat partially.Mixing temperature is normal in the Comparative Examples 2, and in preferred range, but melt temperature surpasses 185 ℃, and too high melt temperature makes an ammonium nitrate generation cigar burning in the fusion tank, can produce thick smoke, and causing can't granulation.Melt temperature is normal in the Comparative Examples 3, and in preferred range, but mixing temperature surpasses 160 ℃, and too high mixing temperature makes the material burning in the tempering tank, begins to smolder, and causing can't granulation.
And among the embodiment an ammonium nitrate carried out fusion and when material mixed, the temperature of employing all in preferred range of the present invention, no abnormal reaction in the preparation process, and material fluidity is good, tablets press is difficult for stopping up, granulation is even, particle is mellow and full, produces normal; Nitrogen content (N%)>=14.5 in the product of preparation, phosphorus content (P
2O
5%)>=14.5, potassium content (K
2O%)>=14.5, total content (N+P
2O
5+ K
2O)>=48.0%, moisture content≤2.0% contains the needed various middle trace elements of crop, all contains the nutrient of homogeneous in each particle, is fit to mechanized application.
More than the preparation method of a kind of compound manure provided by the present invention has been carried out detailed introduction.Used concrete example among this paper principle of the present invention and embodiment are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof.Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention, can also carry out some improvement and modification to the present invention, these improvement and modification also fall in the protection domain of claim of the present invention.
Claims (4)
1. the preparation method of a compound manure is characterized in that, comprising:
A) with an ammonium nitrate fusion, the temperature of fusion tank is 182 ℃, and with monoammonium phosphate, Repone K, filler heating, the temperature of monoammonium phosphate heating unit is set at 60 ℃, and the temperature of Repone K heating unit is set at 100 ℃;
B) with an ammonium nitrate after the fusion with the heating after monoammonium phosphate, Repone K and filler mix,
Be specially, earlier with an ammonium nitrate after the fusion with heat after monoammonium phosphate carry out the first step and mix, mixed then material carries out the second stage with the mixture of Repone K and filler again to be mixed, first step mixing temperature is 155 ℃, second stage mixing temperature is 155 ℃;
Said filler is the mixture of additive and borax;
C) mixed material is carried out the granulation postcooling;
D) cooled material is sieved;
E) nurse one's health after the material after will sieving cools off once more;
The weight percent prescription is: an ammonium nitrate 43%, monoammonium phosphate 28%, Repone K 25.7%, additive 2.7%, borax 0.6%.
2. preparation method according to claim 1 is characterized in that, also comprises before the said step a) raw material an ammonium nitrate, monoammonium phosphate, Repone K are carried out fragmentation, screening and metering respectively, and filler is measured.
3. preparation method according to claim 1 is characterized in that, in the said step d) cooled material is sieved to particle diameter is gone out less than 1mm with greater than the material screening of 4.75mm, and is back to the second stage and mixes; Particle diameter gets into step e) more than or equal to 1mm and smaller or equal to the material of 4.75mm.
4. preparation method according to claim 1 is characterized in that, said step e) also comprises sieves cooled material once more once more.
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| CN200910260067A CN101759478B (en) | 2009-12-24 | 2009-12-24 | Preparation method of compound fertilizer |
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|---|---|---|---|
| CN200910260067A CN101759478B (en) | 2009-12-24 | 2009-12-24 | Preparation method of compound fertilizer |
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| CN101759478A CN101759478A (en) | 2010-06-30 |
| CN101759478B true CN101759478B (en) | 2012-08-29 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103193535A (en) * | 2013-04-18 | 2013-07-10 | 天津芦阳化肥股份有限公司 | Quick-acting slow-released compound fertilizer and preparation method thereof |
| CN105198520B (en) * | 2015-08-14 | 2019-02-01 | 中国石油化工股份有限公司 | Prevent the method that ammonium nitrate fires in high-tower granulation production nitrate-based compound fertilizer technique |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1405125A (en) * | 2001-09-19 | 2003-03-26 | 上海化工研究院 | Method for producing azophoska compound fertilizer |
| CN1182085C (en) * | 2002-01-31 | 2004-12-29 | 周建军 | Process for preparing high-concentration compound N-P-K fertilizer by tower-type granulating |
| CN101357859A (en) * | 2007-08-01 | 2009-02-04 | 福建永春县哈迪利复合肥有限责任公司 | Granular complex fertilizer and molten slurry granulation method thereof |
| CN101440004A (en) * | 2008-12-22 | 2009-05-27 | 张立省 | Method for preparing high tower control release compound fertilizer |
-
2009
- 2009-12-24 CN CN200910260067A patent/CN101759478B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1405125A (en) * | 2001-09-19 | 2003-03-26 | 上海化工研究院 | Method for producing azophoska compound fertilizer |
| CN1182085C (en) * | 2002-01-31 | 2004-12-29 | 周建军 | Process for preparing high-concentration compound N-P-K fertilizer by tower-type granulating |
| CN101357859A (en) * | 2007-08-01 | 2009-02-04 | 福建永春县哈迪利复合肥有限责任公司 | Granular complex fertilizer and molten slurry granulation method thereof |
| CN101440004A (en) * | 2008-12-22 | 2009-05-27 | 张立省 | Method for preparing high tower control release compound fertilizer |
Non-Patent Citations (2)
| Title |
|---|
| 曹广峰.塔式熔体造粒复合肥技术总结.《化肥工业》.2008,(第2期),46-48. * |
| 邱百昌,尹辉.高浓度NPK复合肥的工艺技术探讨.《炼油与化工》.2008,第20卷(第2期),40-42. * |
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Address after: 610000 No. two South Road, Xindu Industrial Development Zone, Chengdu, Sichuan Patentee after: Chengdu cloud picture Cmi Holdings Ltd Address before: 610000 No. two South Road, Xindu Industrial Development Zone, Chengdu, Sichuan Patentee before: Chengdu Xindu Chemical Industry Co., Ltd. |