CN104311341A - Basic fertilizer granulation method - Google Patents
Basic fertilizer granulation method Download PDFInfo
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- CN104311341A CN104311341A CN201410562799.3A CN201410562799A CN104311341A CN 104311341 A CN104311341 A CN 104311341A CN 201410562799 A CN201410562799 A CN 201410562799A CN 104311341 A CN104311341 A CN 104311341A
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- fertilizer
- urea
- binding agent
- alkaline fertilizer
- alkaline
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- 239000003337 fertilizer Substances 0.000 title claims abstract description 123
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000005469 granulation Methods 0.000 title abstract description 31
- 230000003179 granulation Effects 0.000 title abstract description 31
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 58
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims abstract description 54
- 239000011230 binding agent Substances 0.000 claims abstract description 44
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims abstract description 34
- 239000004202 carbamide Substances 0.000 claims abstract description 34
- LFVGISIMTYGQHF-UHFFFAOYSA-N ammonium dihydrogen phosphate Chemical compound [NH4+].OP(O)([O-])=O LFVGISIMTYGQHF-UHFFFAOYSA-N 0.000 claims abstract description 28
- 229910000387 ammonium dihydrogen phosphate Inorganic materials 0.000 claims abstract description 28
- 239000006012 monoammonium phosphate Substances 0.000 claims abstract description 28
- 235000019837 monoammonium phosphate Nutrition 0.000 claims abstract description 28
- 239000002994 raw material Substances 0.000 claims abstract description 13
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 12
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 8
- 230000008569 process Effects 0.000 claims description 19
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 18
- 238000002360 preparation method Methods 0.000 claims description 9
- 238000005453 pelletization Methods 0.000 claims description 6
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 4
- 239000011574 phosphorus Substances 0.000 claims description 4
- 239000003513 alkali Substances 0.000 claims description 2
- 239000012467 final product Substances 0.000 claims description 2
- 230000007935 neutral effect Effects 0.000 claims description 2
- 229910052700 potassium Inorganic materials 0.000 abstract description 11
- 239000002689 soil Substances 0.000 abstract description 10
- 235000015097 nutrients Nutrition 0.000 abstract description 9
- 238000010438 heat treatment Methods 0.000 abstract description 6
- 239000002253 acid Substances 0.000 abstract description 5
- 239000000428 dust Substances 0.000 abstract description 5
- 238000010521 absorption reaction Methods 0.000 abstract description 4
- 239000003795 chemical substances by application Substances 0.000 abstract description 3
- 238000005507 spraying Methods 0.000 abstract description 3
- 239000007788 liquid Substances 0.000 abstract description 2
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 239000011777 magnesium Substances 0.000 description 13
- 239000011575 calcium Substances 0.000 description 12
- 229910052749 magnesium Inorganic materials 0.000 description 12
- 239000007921 spray Substances 0.000 description 12
- 229910052791 calcium Inorganic materials 0.000 description 11
- 230000000694 effects Effects 0.000 description 11
- 229910019142 PO4 Inorganic materials 0.000 description 8
- ZFXVRMSLJDYJCH-UHFFFAOYSA-N calcium magnesium Chemical compound [Mg].[Ca] ZFXVRMSLJDYJCH-UHFFFAOYSA-N 0.000 description 8
- 239000000378 calcium silicate Substances 0.000 description 8
- 229910052918 calcium silicate Inorganic materials 0.000 description 8
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 8
- 239000010452 phosphate Substances 0.000 description 8
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 8
- 239000000126 substance Substances 0.000 description 8
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 7
- PZDFRGGOXGETNN-UHFFFAOYSA-N phosphane;potassium Chemical compound P.[K] PZDFRGGOXGETNN-UHFFFAOYSA-N 0.000 description 7
- 239000000463 material Substances 0.000 description 6
- 239000000203 mixture Substances 0.000 description 6
- QJZYHAIUNVAGQP-UHFFFAOYSA-N 3-nitrobicyclo[2.2.1]hept-5-ene-2,3-dicarboxylic acid Chemical compound C1C2C=CC1C(C(=O)O)C2(C(O)=O)[N+]([O-])=O QJZYHAIUNVAGQP-UHFFFAOYSA-N 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 4
- 239000004021 humic acid Substances 0.000 description 4
- 230000008676 import Effects 0.000 description 4
- 239000004571 lime Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 229910052710 silicon Inorganic materials 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical group [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 3
- 230000020477 pH reduction Effects 0.000 description 3
- 238000012856 packing Methods 0.000 description 3
- 239000011591 potassium Substances 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- LAZOHFXCELVBBV-UHFFFAOYSA-N [Mg].[Ca].[Si] Chemical compound [Mg].[Ca].[Si] LAZOHFXCELVBBV-UHFFFAOYSA-N 0.000 description 2
- 239000002585 base Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- PASHVRUKOFIRIK-UHFFFAOYSA-L calcium sulfate dihydrate Chemical compound O.O.[Ca+2].[O-]S([O-])(=O)=O PASHVRUKOFIRIK-UHFFFAOYSA-L 0.000 description 2
- 239000000571 coke Substances 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000000050 nutritive effect Effects 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000010791 quenching Methods 0.000 description 2
- 230000000171 quenching effect Effects 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- DLYUQMMRRRQYAE-UHFFFAOYSA-N tetraphosphorus decaoxide Chemical compound O1P(O2)(=O)OP3(=O)OP1(=O)OP2(=O)O3 DLYUQMMRRRQYAE-UHFFFAOYSA-N 0.000 description 2
- 235000013619 trace mineral Nutrition 0.000 description 2
- 239000011573 trace mineral Substances 0.000 description 2
- 239000005995 Aluminium silicate Substances 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- YMKIRWHSXOBLCF-UHFFFAOYSA-N [Mg].[P].[Ca] Chemical compound [Mg].[P].[Ca] YMKIRWHSXOBLCF-UHFFFAOYSA-N 0.000 description 1
- YUWBVKYVJWNVLE-UHFFFAOYSA-N [N].[P] Chemical compound [N].[P] YUWBVKYVJWNVLE-UHFFFAOYSA-N 0.000 description 1
- RDXARWSSOJYNLI-UHFFFAOYSA-N [P].[K] Chemical compound [P].[K] RDXARWSSOJYNLI-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000007605 air drying Methods 0.000 description 1
- 235000012211 aluminium silicate Nutrition 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000012824 chemical production Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000000536 complexating effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 238000006253 efflorescence Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 238000013467 fragmentation Methods 0.000 description 1
- 238000006062 fragmentation reaction Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 239000000618 nitrogen fertilizer Substances 0.000 description 1
- 235000021049 nutrient content Nutrition 0.000 description 1
- 208000015380 nutritional deficiency disease Diseases 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000008635 plant growth Effects 0.000 description 1
- 229940072033 potash Drugs 0.000 description 1
- ZDHURYWHEBEGHO-UHFFFAOYSA-N potassiopotassium Chemical compound [K].[K] ZDHURYWHEBEGHO-UHFFFAOYSA-N 0.000 description 1
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Substances [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 1
- 235000015320 potassium carbonate Nutrition 0.000 description 1
- 230000003389 potentiating effect Effects 0.000 description 1
- 206010037844 rash Diseases 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
- C05G3/90—Mixtures of one or more fertilisers with additives not having a specially fertilising activity for affecting the nitrification of ammonium compounds or urea in the soil
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05B—PHOSPHATIC FERTILISERS
- C05B7/00—Fertilisers based essentially on alkali or ammonium orthophosphates
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G5/00—Fertilisers characterised by their form
- C05G5/30—Layered or coated, e.g. dust-preventing coatings
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Pest Control & Pesticides (AREA)
- Soil Sciences (AREA)
- Fertilizers (AREA)
Abstract
The invention relates to a basic fertilizer granulation method which comprises the following steps: heating binder raw materials including hydrochloric acid, urea, sulfuric acid and monoammonium phosphate at a certain ratio to form a liquid as a basic fertilizer spraying agent, and regulating the adding ratio of the binder to the basic fertilizer so as to ensure that a powdered basic fertilizer is granulated and the granular basic fertilizer has certain hardness and is not easily pulverized. According to the basic fertilizer granulation method provided by the invention, on one hand, the problem that the dust is too much when a farmer uses the fertilizer can be solved; on the other hand, the acid soil is improved, the absorption of nutrient elements is promoted, the N, P and K nutrient ratio is higher, and the yield and quality of plants can be improved.
Description
Technical field
The present invention relates to a kind of prilling process of alkaline fertilizer, belong to chemical production technical field.
Background technology
Farm crop " high yield is high-quality not, and high-quality is high yield not ", this serious problem annoyings the agriculture production of China always.China is in production estimation process, and usually due to a variety of causes, the chemical fertilizer such as excessive applied nitrogen, although obtain high yield, use chemical fertilizer for a long time in a large number and cause soil acidification.The potential of hydrogen of soil is vital to plant-growth, soil acidification can cause most of middle and trace element absorption rate very low, fertilizer loss is serious, and utilization rate of fertilizer, less than 30%, also makes the phosphorus potassium composition of the easy generation insoluble substance of 60-80% not absorb simultaneously, thus crop alimentary is bad, nutritional deficiency disease is serious, due to soil acidification, changes soil microenvironment, rhizosphere harmful microorganism amount reproduction in acid condition, and these Disease management difficulties.
On domestic market, alkaline fertilizer is as silico-calcium potassium phosphorus fertiliser containing magnesium: add the mixture after coke or hard coal and coke grinding after being mixed with insoluble potassium bearing rock by phosphorus ore again, obtained after high-temperature roasting.As potash-lime fertilizer: utilize potassium ore and Wingdale (lime) or rhombspar, or potassium felspar sand, Wingdale and phosphogypsum, or phosphogypsum and insolublely to obtain containing roasting under potassium potassium rock high temperature.Also just like Si, Ca, Mg, K fertilizer, fused(calcium magnesium)phosphate, calcium silicate fertilizer etc., most of alkaline fertilizer product carries out packing, selling with the state of powder, like this packing, carry, sell, dust pollution is serious and cause waste to a certain degree in application.In addition, rotten with the change of natural condition due to this alkaline fertilizer, and the non-hygroscopic and character such as not lump, cause fused(calcium magnesium phosphorus)potash fertilizer to make the very difficult of particle, even if granulating is also because the interaction force between material is less, cause packing rear fragmentation.
Patent of invention CN201110217243.7 discloses a kind of humic acid silicon calcium magnesium fertilizer and production method thereof.It is produced by the following method: Water Quenching Slag is 15% ~ 25% through natural air drying to water content, dried Water Quenching Slag enters ball mill grinding, be ground to 80 ~ 100 order grades, then to be the humic acid material of 75% ~ 80% (massfraction) by the powder of milled and content of humic acid be in mass ratio 2: 1 ~ 1.5 mixes and forms mixture A, the binding agent of 5% ~ 10% of mixture A quality is added again in mixture A, be uniformly mixed, granulation on granulation of fertilizer machine again, granulation process in mixture A quality 10% ~ 15% ratio spray moisture make it form granulated fertilizer, the grade of fertilizer controls at 2 ~ 4mm, the obtained humic acid silicon calcium magnesium fertilizer finally by oven dry.The binding agent used during this invention granulation is kaolin and wilkinite, and fertilizer after granulation is frangible, not containing N, P, K nutrient, can not meet the demand of farm crop to these nutrients.
Patent of invention CN200910074326.8 discloses a kind of manufacture and granulation process of high-activity Si, Ca, Mg, K fertilizer, after its calcining, Temperature fall is to normal temperature, adds nitrogen fertilizer potentiating agent, then adds corresponding trace element, then spill wet with sulfuric acid, granulation, oven dry, classification, packaging.Fertilizer after this invention granulation is not containing nitrogen phosphorus nutrient.And this invention granulation only uses sulfuric acid to spill wet cannot learn granulation outcome.
In a word, alkaline fertilizer without granulation is a kind of multi-element fertilizer, the aqueous solution, in alkalescence, significantly can improve acid soil, fine as base fertilizer effect during cultivating large seedling, plant can slowly absorb required nutrient, but its P, K nutrient content is low, the nitrogen nutrient that crop needs can not be supplemented while reconciling soil, and fertilising time dust from flying, easily cause fertilizer loss, contaminate environment, human body suction can damage HUMAN HEALTH.
Summary of the invention
For the deficiencies in the prior art, the invention provides a kind of alkaline fertilizer prilling process.By spraying adhesive, granulation is carried out to alkaline fertilizer, the problem that when peasant household uses, dust is too large can be solved on the one hand; On the other hand while improvement acid soil, promote the absorption of nutritive element, there is higher N, P, K nutrient formula, the yield and quality of agricultural-food can be improved.
Technical scheme of the present invention is as follows:
A prilling process for alkaline fertilizer, step is as follows:
(1) control temperature of reactor at 55 ~ 65 DEG C, first add hydrochloric acid and urea wherein, be stirred to after urea all dissolves and add sulfuric acid, finally add monoammonium phosphate; Wherein the mass ratio of hydrochloric acid, urea, sulfuric acid, monoammonium phosphate is 2.0 ~ 3.0:7.0 ~ 8.5:1:2 ~ 4; Binding agent obtained after adding all raw materials maintains the temperature at 55 ~ 65 DEG C, for subsequent use;
(2) first 1/3 ~ 1/2 quality of alkaline fertilizer is added in pelletizing disks, the consumption mass ratio of alkaline fertilizer and binding agent is 1 ~ 3:1, alkaline fertilizer surface is sprayed on after being filtered by binding agent obtained for step (1), add the alkaline fertilizer of residual mass afterwards, sieve after granulating, pack and get final product.
Preferred according to the present invention, in step (1) preparation binding agent raw materials used for technical grade purity be the hydrochloric acid of 37.5%, nitrogen content is the urea of 46.5%, technical grade purity be 98% sulfuric acid and available phosphorus content be 44%, nitrogen content is the monoammonium phosphate of 11%;
Preferred according to the present invention, in step (1), the mass ratio of hydrochloric acid, urea, sulfuric acid, monoammonium phosphate is 2.0 ~ 2.5:7.0 ~ 8.0:1:2 ~ 3.5.
Preferred further, in step (1), the mass ratio of hydrochloric acid, urea, sulfuric acid, monoammonium phosphate is 2.1 ~ 2.2:7.6 ~ 7.7:1:3.
Preferred according to the present invention, the usage ratio of step (2) neutral and alkali fertilizer and binding agent is 2:1.
Alkaline fertilizer of the present invention refers to silico-calcium potassium phosphorus fertiliser containing magnesium, potash-lime fertilizer, Si, Ca, Mg, K fertilizer, fused(calcium magnesium)phosphate, calcium silicate fertilizer etc., and market can be purchased.
In the present invention if no special instructions, the equipment of use and raw material are commercially available.
After granulation of the present invention, the using method of alkaline fertilizer is as follows: in application should with base fertilizer with the use of, can not azophoska be replaced.Common crops consumption is 50-150kg/ mu, food crop consumption 50-100kg/ mu, cash crop 100-150kg/ mu.
Prilling process of the present invention is by after binding agent heating raw materials to liquid, as the spraying agent of alkaline fertilizer, by the adding proportion of both adjustment, makes powdery alkaline fertilizer become particulate state, and has certain degree of hardness, not easily efflorescence.The present invention has following advantage and beneficial effect:
1. the present invention use the ratio of each raw material of binding agent reasonable compatibility and the order of interpolation, make it not only have higher viscosity, be also beneficial to ejection, be conducive to industrial operation.
2. Fe, Mg, Al in the binding agent energy complexing alkaline fertilizer that uses of the present invention, thus make alkaline fertilizer granulating, easy disintegrating (Fig. 1 and Fig. 2), and hardness can reach 10 newton.And the problem that when peasant household uses, dust is too large can be solved after granulating, facilitate peasant household to use.
3, the present invention uses the nutrient of the interpolation energy equilibrium product of urea and monoammonium phosphate in binding agent, and in the finished product, nitrogen content mass percent is 8.50 ~ 9.50%, and phosphorus pentoxide content mass percent is 3.00 ~ 3.50%.
The pH of the alkaline fertilizer 4, after granulation, between 7.00 ~ 7.38, while improvement acid soil, promotes nutritive element element absorption, can improve the output of plant and quality.
5, prilling process technique of the present invention is simple, and does not need to dry, and saves cost.
Accompanying drawing explanation
Fig. 1 is the alkaline fertilizer after embodiment 1 granulation;
Fig. 2 is the embodiment 1 alkaline fertilizer disintegration effect of 1 hour.
Experimental example: binding agent disintegration screening experiment
1. the impact prepared binding agent of the feeding sequence of reaction mass: sulfuric acid, urea, hydrochloric acid, monoammonium phosphate are fed intake according to different order and prepare binding agent, according to reacting phenomenon and the feeding sequence of viscosity determination reaction mass preparing binding agent.Experimental result is in table 1.
The impact that the feeding sequence of table 1 reaction mass is prepared binding agent
Conclusion: can determine that the feeding sequence of reaction mass is followed successively by hydrochloric acid, urea, sulfuric acid, monoammonium phosphate by table 1.
2. temperature of reaction is on the impact of bonding preparation: at the temperature of 45 DEG C, 50 DEG C, 55 DEG C, 60 DEG C, 65 DEG C, 70 DEG C, prepare binding agent respectively, experimental result is in table 2.
Table 2 temperature of reaction is on the impact of bonding preparation
| Temperature of reactor | Experimental phenomena |
| 45℃ | Hydrochloric acid, urea, sulfuric acid and monoammonium phosphate dissolve not exclusively |
| 50℃ | Non-solute doses is less, but sprays Fine spray shower nozzle in process and easily block up |
| 55℃ | Material dissolves completely, sprays for some time namely to cause shower nozzle to block |
| 60℃ | Material dissolves completely, and shower nozzle atomizing effect is good |
| 65℃ | Material dissolves completely, and shower nozzle atomizing effect is better |
| 70℃ | Material dissolves completely, but shower nozzle atomizing effect reduces |
Conclusion: can determine that temperature of reaction is 55 DEG C ~ 65 DEG C by table 2.
3. different binder formulas is to influential effect after alkaline fertilizer granulation: hydrochloric acid, urea, sulfuric acid, monoammonium phosphate are fed intake and granulation by different proportionings successively, fertilizer after granulation is placed in the tap water of 250ml/3g, measure disintegration effect, in water, the complete disintegration of 60min is that effect is good.Fertiliser granulates hardness is detected by Ai Dede HP-100 digital displaying push-and-pull tensiometer, and it is good for being greater than 9 newton with hardness.Experimental result is in table 3.
The different binder formula of table 3 is to influential effect after alkaline fertilizer granulation
Conclusion: binding agent adds by the order of hydrochloric acid, urea, sulfuric acid, monoammonium phosphate, and additional proportion is 2 ~ 3:7 ~ 8.5:1:2 ~ 4, and hardness and the disintegration effect of the granular alkaline fertilizer obtained are better; The present invention is preferred, and the mass ratio of hydrochloric acid, urea, sulfuric acid, monoammonium phosphate is 2.0 ~ 2.5:7.0 ~ 8.0:1:2 ~ 3.5; Preferred further, the mass ratio of hydrochloric acid, urea, sulfuric acid, monoammonium phosphate is 2.1 ~ 2.2:7.6 ~ 7.7:1:3.
Embodiment
Below in conjunction with embodiment, set forth the present invention further.Should be understood that these embodiments are only not used in for illustration of the present invention to limit the scope of the invention.
The alkaline fertilizer that the embodiment of the present invention uses is silico-calcium potassium phosphorus fertiliser containing magnesium commercially available on market, potash-lime fertilizer, Si, Ca, Mg, K fertilizer, fused(calcium magnesium)phosphate, calcium silicate fertilizer etc.
Described preparation binding agent raw materials used for technical grade purity be 37.5% hydrochloric acid, the urea of nitrogen content 46.5%, technical grade purity be 98% sulfuric acid and phosphorus content 44%, nitrogen content 11% monoammonium phosphate, market can be purchased.
Embodiment 1
A kind of prilling process of alkaline fertilizer (silico-calcium potassium phosphorus fertiliser containing magnesium), step is as follows:
(1) preparation of binding agent
Control temperature of reactor at 55 DEG C, first add hydrochloric acid and urea wherein, be stirred to after urea all dissolves and add sulfuric acid, finally add monoammonium phosphate; Wherein the mass ratio of hydrochloric acid, urea, sulfuric acid, monoammonium phosphate is 2.1:7.6:1:3; Binding agent obtained after adding all raw materials maintains the temperature at 60 DEG C, for subsequent use;
(2) alkaline fertilizer (silico-calcium potassium phosphorus fertiliser containing magnesium) granulation
First add quality in pelletizing disks by 1/2 of alkaline fertilizer (silico-calcium potassium phosphorus fertiliser containing magnesium), the amount ratio of alkaline fertilizer and binding agent is 2:1, import after binding agent after heating is filtered in the spray gun of Fine spray shower nozzle, beat the alkaline fertilizer surface in rotating disk, add the alkaline fertilizer of residue 1/2 afterwards, fertilizer after granulating, through belt transmission, sieves, and pack is preserved.
Every physico-chemical property of the alkaline fertilizer (silico-calcium potassium phosphorus fertiliser containing magnesium) after granulation is in table 4.
Embodiment 2
A kind of prilling process of alkaline fertilizer (calcium silicate fertilizer), step is as follows:
(1) preparation of binding agent
Control temperature of reactor at 58 DEG C, first add hydrochloric acid and urea wherein, be stirred to after urea all dissolves and add sulfuric acid, finally add monoammonium phosphate; Wherein the mass ratio of hydrochloric acid, urea, sulfuric acid, monoammonium phosphate is 2.2:7.7:1:3; Binding agent obtained after adding all raw materials maintains the temperature at 60 DEG C, for subsequent use;
(2) alkaline fertilizer (calcium silicate fertilizer) granulation
First add quality in pelletizing disks by 1/3 of alkaline fertilizer (calcium silicate fertilizer), the amount ratio of alkaline fertilizer and binding agent is 2:1, import after binding agent after heating is filtered in the spray gun of Fine spray shower nozzle, beat alkaline fertilizer (calcium silicate fertilizer) surface in rotating disk, add the alkaline fertilizer of residue 2/3 afterwards, fertilizer after granulating, through belt transmission, sieves, and pack is preserved.
Every physico-chemical property of the alkaline fertilizer (calcium silicate fertilizer) after granulation is in table 4.
Embodiment 3
A kind of prilling process of alkaline fertilizer (fused(calcium magnesium)phosphate), step is as follows:
(1) preparation of binding agent
Control temperature of reactor at 60 DEG C, first add hydrochloric acid and urea wherein, be stirred to after urea all dissolves and add sulfuric acid, finally add monoammonium phosphate; Wherein the mass ratio of hydrochloric acid, urea, sulfuric acid, monoammonium phosphate is 2.5:7.9:1:3.2; Binding agent obtained after adding all raw materials maintains the temperature at 65 DEG C, for subsequent use;
(2) alkaline fertilizer (fused(calcium magnesium)phosphate) granulation
First add quality in pelletizing disks by 1/2 of alkaline fertilizer (fused(calcium magnesium)phosphate), the amount ratio of alkaline fertilizer and binding agent is 2:1, import after binding agent after heating is filtered in the spray gun of Fine spray shower nozzle, beat alkaline fertilizer (fused(calcium magnesium)phosphate) surface in rotating disk, add the alkaline fertilizer of residue 1/2 afterwards, fertilizer after granulating, through belt transmission, sieves, and pack is preserved.
Every physico-chemical property of the alkaline fertilizer (fused(calcium magnesium)phosphate) after granulation is in table 4.
Embodiment 4
A kind of prilling process of alkaline fertilizer (ca and mg fertilizer), step is as follows:
(1) preparation of binding agent
Control temperature of reactor at 60 DEG C, first add hydrochloric acid and urea wherein, be stirred to after urea all dissolves and add sulfuric acid, finally add monoammonium phosphate; Wherein the mass ratio of hydrochloric acid, urea, sulfuric acid, monoammonium phosphate is 3.0:8.0:1:3.5; Binding agent obtained after adding all raw materials maintains the temperature at 65 DEG C, for subsequent use;
(2) alkaline fertilizer (ca and mg fertilizer) granulation
First add quality in pelletizing disks by 1/2 of alkaline fertilizer (ca and mg fertilizer), the amount ratio of alkaline fertilizer and binding agent is 2:1, import after binding agent after heating is filtered in the spray gun of Fine spray shower nozzle, beat alkaline fertilizer (ca and mg fertilizer) surface in rotating disk, add the alkaline fertilizer of residue 1/2 afterwards, fertilizer after granulating, through belt transmission, sieves, and pack is preserved.
Every physico-chemical property of the alkaline fertilizer (ca and mg fertilizer) after granulation is in table 4.
Every physico-chemical property of the alkaline fertilizer after table 4 granulation
| Sample | N％ | P％ | K％ | Fe％ | Al％ | Si％ | Ca％ | Mg％ | PH | Moisture % |
| Embodiment 1 | 9.40 | 3.20 | 3.48 | 2.19 | 6.39 | 19.77 | 21.40 | 7.59 | 7.36 | 3.05 |
| Embodiment 2 | 9.29 | 3.16 | \ | \ | \ | 26.10 | 35.90 | \ | 7.24 | 3.07 |
| Embodiment 3 | 9.09 | 3.21 | \ | \ | \ | \ | 34.12 | 27.85 | 7.12 | 3.12 |
| Embodiment 4 | 8.73 | 3.31 | \ | \ | \ | \ | 31.89 | 28.98 | 7.06 | 3.19 |
Claims (5)
1. a prilling process for alkaline fertilizer, is characterised in that, step is as follows:
(1) control temperature of reactor at 55 ~ 65 DEG C, first add hydrochloric acid and urea wherein, be stirred to after urea all dissolves and add sulfuric acid, finally add monoammonium phosphate; Wherein the mass ratio of hydrochloric acid, urea, sulfuric acid, monoammonium phosphate is 2.0 ~ 3.0:7.0 ~ 8.5:1:2 ~ 4; Binding agent obtained after adding all raw materials maintains the temperature at 55 ~ 65 DEG C, for subsequent use;
(2) first 1/3 ~ 1/2 quality of alkaline fertilizer is added in pelletizing disks, the consumption mass ratio of alkaline fertilizer and binding agent is 1 ~ 3:1, alkaline fertilizer surface is sprayed on after being filtered by binding agent obtained for step (1), add the alkaline fertilizer of residual mass afterwards, sieve after granulating, pack and get final product.
2. the prilling process of alkaline fertilizer as claimed in claim 1, be characterised in that, in step (1) preparation binding agent raw materials used for technical grade purity be 37.5% hydrochloric acid, nitrogen content be 46.5% urea, technical grade purity be 98% sulfuric acid and available phosphorus content be 44%, nitrogen content is the monoammonium phosphate of 11%.
3. the prilling process of alkaline fertilizer as claimed in claim 1, is characterised in that, in step (1), the mass ratio of hydrochloric acid, urea, sulfuric acid, monoammonium phosphate is 2.0 ~ 2.5:7.0 ~ 8.0:1:2 ~ 3.5.
4. the prilling process of alkaline fertilizer as claimed in claim 3, is characterised in that, in step (1), the mass ratio of hydrochloric acid, urea, sulfuric acid, monoammonium phosphate is 2.1 ~ 2.2:7.6 ~ 7.7:1:3.
5. the prilling process of alkaline fertilizer as claimed in claim 1, be characterised in that, the usage ratio of step (2) neutral and alkali fertilizer and binding agent is 2:1.
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| CN104761322A (en) * | 2015-04-22 | 2015-07-08 | 于书强 | Alkaline fertilizer |
| CN107602184A (en) * | 2017-09-18 | 2018-01-19 | 安徽省嘉丰肥业有限公司 | A kind of prilling process of composite fertilizer |
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| CN104311341B (en) | 2016-08-24 |
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