CN105777273A - Method for granulating mineral element chelated nitric phosphate fertilizer - Google Patents
Method for granulating mineral element chelated nitric phosphate fertilizer Download PDFInfo
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- CN105777273A CN105777273A CN201610196524.1A CN201610196524A CN105777273A CN 105777273 A CN105777273 A CN 105777273A CN 201610196524 A CN201610196524 A CN 201610196524A CN 105777273 A CN105777273 A CN 105777273A
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05B—PHOSPHATIC FERTILISERS
- C05B11/00—Fertilisers produced by wet-treating or leaching raw materials either with acids in such amounts and concentrations as to yield solutions followed by neutralisation, or with alkaline lyes
- C05B11/04—Fertilisers produced by wet-treating or leaching raw materials either with acids in such amounts and concentrations as to yield solutions followed by neutralisation, or with alkaline lyes using mineral acid
- C05B11/06—Fertilisers produced by wet-treating or leaching raw materials either with acids in such amounts and concentrations as to yield solutions followed by neutralisation, or with alkaline lyes using mineral acid using nitric acid (nitrophosphates)
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05B—PHOSPHATIC FERTILISERS
- C05B17/00—Other phosphatic fertilisers, e.g. soft rock phosphates, bone meal
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
- C05F17/00—Preparation of fertilisers characterised by biological or biochemical treatment steps, e.g. composting or fermentation
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
- C05F9/00—Fertilisers from household or town refuse
- C05F9/04—Biological compost
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/40—Bio-organic fraction processing; Production of fertilisers from the organic fraction of waste or refuse
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Abstract
The invention discloses a method for granulating mineral element chelated nitric phosphate fertilizer. The method comprises the following steps: (1) uniformly mixing phosphatic fertilizer and nitric phosphate fertilizer at 145-165 DEG C to obtain slurry; (2) uniformly mixing a mineral element preparation and the slurry at 140-155 DEG C to obtain mixed slurry, and keeping the temperature in the step (2) to be lower than that in the step (1); and (3) spraying the mixed slurry to obtain mineral element-containing nitric phosphate fertilizer granules. According to the method, multiple functional bacteria and organic carbon nutrients can be used for activating low-grade phosphate resource containing medium and trace elements at a certain temperature, and the utilization of the phosphate resource can be improved.
Description
Technical field
The invention belongs to field of compound fertilizer production, particularly relate to the granulation process of the nitrophosphate fertilizer of a kind of chelate mineral element.
Background technology
At present, in the product of domestic phosphate ore processing, phosphate fertilizer is mainly processed as master in a wet process, and phosphate is based on full-boiled process (yellow phosphorus method).And phosphatic heat processing route is owing to other energy consumption is high, cost is high, resource utilization is relatively low, environmental pollution is comparatively serious, face the phosphatic challenge of Wet-process Phosphoric Acid Production.In sum, domestic these problems existed in phosphate ore processing at present, if do not solved smoothly, can cause the rapid approach exhaustion of domestic limited phosphate rock resource on the one hand, affect the sustainable development of sulphur dioxide of phosphor chemical industry；On the other hand, the phosphate rock resource of a large amount of middle-low grade is not fully used, and resource utilization is low, causes the significant wastage of non-renewable phosphor resource.It addition, also need to interpolation medium trace element in compound fertilizer, or add the medium trace element of EDTA chelating.
CN104108969A discloses the granulation process of a kind of phosphorus-potassium nitrate fertilizer, comprises the following steps: phosphate fertilizer, at 145-165 DEG C, is mixed homogeneously with nitrophosphate fertilizer and obtained slip by (1)；(2) at 140-155 DEG C, being mixed homogeneously with slip by potash fertilizer, obtain mixed slurry, the temperature of step (2) is lower than the temperature of step (1)；(3) spray mixed slurry, obtain phosphorus-potassium nitrate fertilizer granule；Described nitrophosphate fertilizer be by nitrophosphate fertilizer finished particle, nitrophosphate fertilizer returning charge granule or nitrophosphate fertilizer and concentrated solution heat at 135-190 DEG C after the nitrophosphate fertilizer slip that obtains.This technology discloses the granulation process of phosphorus-potassium nitrate fertilizer, is add potash fertilizer at second step on the basis of nitrophosphate fertilizer, does not disclose mineral element formulation application in nitrophosphate fertilizer, particularly with mid low grade phosphate rock；Phosphorus content in mid low grade phosphate rock is less, utilizes phosphorus ore to prepare phosphate fertilizer product in the prior art, and the available phosphorus utilization rate of phosphate fertilizer product is not high, and the utilization rate of other mineral elements in phosphorus ore is not high yet；In current production, cation in mineral element is relatively low with the chelation percent of fertilizer especially fertilizer, mineral element effective rate of utilization in crop can not be improved, therefore, can not be conventionally Technology the combination of mineral and nitrophosphate fertilizer just can be reached the purpose of raising available phosphorus and mineral element utilization rate, need mineral especially low-grade phosphate ore is processed, so as to be more easy to absorbed by crops.
Summary of the invention
It is an object of the invention to by several functions bacterium, organic carbon nutrient at a certain temperature, make the phosphate rock resource of the middle-low grade containing medium trace element activate, improve the utilization rate of this part phosphate rock resource.The present invention is the nitrophosphate fertilizer overcoming the defect of prior art to provide a kind of chelating mineral element.
The object of the invention is achieved through the following technical solutions.
The granulation process of the nitrophosphate fertilizer of a kind of chelate mineral element, comprises the following steps:
(1) at 145～165 DEG C, phosphate fertilizer is mixed homogeneously with nitrophosphate fertilizer and obtains slip；
(2) at 140～155 DEG C, being mixed homogeneously with slip by mineral element preparation, obtain mixed slurry, the temperature of step (2) is lower than the temperature of step (1)；
(3) spray mixed slurry, obtain containing mineral element nitrophosphate fertilizer granule；
Described nitrophosphate fertilizer be by nitrophosphate fertilizer finished particle, nitrophosphate fertilizer returning charge granule or nitrophosphate fertilizer and concentrated solution heat at 135～190 DEG C after the nitrophosphate fertilizer slips that obtain.
Step 2 mineral element preparation is directly added in high temperature slip, runs into high temperature slip and melts, and calcium and magnesium siliceous fertilizer adds without being heated to be molten state, and coil pipe or the adjoining pipe of heating are also only to provide a small amount of heat and are incubated.
The temperature of step (2) is lower than the temperature of step (1), and step 2 can by temperature more than the slip of step one, it is provided that a small amount of heat or heat hardly.
Described nitrophosphate fertilizer finished particle is the nitrophosphate fertilizer product obtained after pelletize with concentrated solution in nitrophosphate fertilizer.The preferred biaxial granulation machine of pelletize mode, rotary drum granulator, granulating disc or oil bath comminutor.
Described nitrophosphate fertilizer returning charge granule is in nitrophosphate fertilizer and the concentrated solution returning charge granule obtained after pelletize, screening.The preferred biaxial granulation machine of pelletize mode, rotary drum granulator, granulating disc or oil bath comminutor.
Preferably, comprising the following steps with the preparation method of concentrated solution: the first step in described nitrophosphate fertilizer, nitric acid and phosphorus ore reaction prepare acid hydrolysis solution；Second step, filters；3rd step, the chilled crystallization crystalline solid of clear liquid after filtration；4th step, removes crystalline solid；5th step, logical ammonia and the clear liquid removing crystal are neutralized reaction；6th step, after neutralization, slip carries out in the nitrophosphate fertilizer that the prepared mass percent of multistage concentration is 85%～98% and concentrated solution.
Preferably, described sprinkling mixed slurry is to be sprayed by the rotary nozzle of high tower granulator.
Preferably, described is be heated by the tower top slip storage tank being delivered to high tower with concentrated solution by liquid conducting pipes in nitrophosphate fertilizer 135～190 DEG C of heating.
Preferably, described is that the tower top slip storage tank that nitrophosphate fertilizer finished particle and the boosted machine of nitrophosphate fertilizer returning charge granule are delivered to high tower is heated 135～190 DEG C of heating.
Preferably, described melting is to adopt steam heating or electrical heating.Steam heats preferred steam-coil-heater.
Preferably, the step of screening and the process of surface anti-caking is also included after described sprinkling mixed slurry.
Preferably, also include the step carrying out emulsifying before spraying mixed slurry, it is possible to make slip stir, make the phosphorus-potassium nitrate fertilizer granule strength height of acquisition and light circularity good.
It is preferred that, with concentrated solution at 135～190 DEG C of nitrophosphate fertilizer slips obtained after heating in nitrophosphate fertilizer, again concentrate again through whole level vaporizer, prepare the nitrophosphate fertilizer slurry solution of 98% concentration.
Described mineral element preparation obtains by the following method: by mid low grade phosphate rock powder, organic carbon source, zeolite, brown coal and catalyst mix, adds functional microbial inoculum, and hybrid composting ferments 15-20 days, grinds, obtains mineral element preparation.Consumption is: mid low grade phosphate rock powder 65～85%, organic carbon source 5～15%, zeolite 10～15%, brown coal 5～10%, catalyst 2～5%, and above percent is percetage by weight, and summation is 100%.Mid low grade phosphate rock powder crosses 100 orders, and above percent is percetage by weight, and summation is 100%.
Preferably, described catalyst is acetic acid, citric acid, tartaric acid or lactic acid.
Preferably, described functional microbial inoculum is bacillus subtilis, bacillus megaterium or colloid bacillus cereus.
Preferably, described organic carbon source is bagasse, manioc waste, monosodium glutamate waste liquid, tealeaf residue or peat.
Mineral element preparation in the present invention and the consumption of phosphate fertilizer, nitrophosphate fertilizer be arbitrarily than, preferably, by weight, mineral element preparation: phosphate fertilizer: nitrophosphate fertilizer=1～100:1～100:1～100, it is furthermore preferred that mineral element preparation: phosphate fertilizer: nitrophosphate fertilizer=1～10:1～10:1～10.
Preferably, available phosphorus P in described mid low grade phosphate rock powder2O5Content < 26wt%.
Preferably, described functional microbial inoculum is one or more in bacillus subtilis, bacillus megaterium or colloid bacillus cereus, the living bacteria count of described function microbial inoculum more than 200,000,000/gram.
Preferably, described organic carbon source is one or more in bagasse, manioc waste, monosodium glutamate waste liquid, tealeaf residue or peat.
Preferably, the percetage by weight of described functional microbial inoculum is 1～5%.
The present invention provides the nitrophosphate fertilizer of a kind of chelate mineral element, and described nitrophosphate fertilizer is prepared by the following method:
(1) at 145～165 DEG C, phosphate fertilizer is mixed homogeneously with nitrophosphate fertilizer and obtains slip；
(2) at 140～155 DEG C, being mixed homogeneously with slip by mineral element preparation, obtain mixed slurry, the temperature of step (2) is lower than the temperature of step (1)；
(3) spray mixed slurry, obtain containing mineral element nitrophosphate fertilizer granule；
Described nitrophosphate fertilizer be by nitrophosphate fertilizer finished particle, nitrophosphate fertilizer returning charge granule or nitrophosphate fertilizer and concentrated solution heat at 135～190 DEG C after the nitrophosphate fertilizer slips that obtain；
The temperature of step (2) is lower than the temperature of step (1), and step (2) can by the remaining temperature of the slip of step (1), it is provided that a small amount of heat or heat hardly；
Described mineral element preparation obtains by the following method: mid low grade phosphate rock powder 65～85%, organic carbon source 5～15%, zeolite 10～15%, brown coal 5～10%, and catalyst 2～5% adds functional microbial inoculum, and hybrid composting ferments 15-20 days；Mid low grade phosphate rock powder crosses 100 orders, and above percent is percetage by weight, and summation is 100%.
The present invention is relative to prior art have the advantage that and beneficial effect:
(1) melting charge slurry moisture is low, it is not necessary to dry run, has saved energy consumption；The equipment of the present invention has simple in construction, is easily installed and safeguards, the features such as cost is low, owing to eliminating drying process and part cooling device, thus can save the dry investment with part cooling device and operation, maintenance cost；
(2) particle surface is smooth, mellow and full, prevented from caking, has the higher market competitiveness；
(3) good operational environment, three-waste free discharge, belong to process for cleanly preparing；
(4) nitrophosphate fertilizer and mineral element preparation mix after melting, and slip mixing can be made more uniform；
(5) raw material adopts in nitrophosphate fertilizer and concentrated solution, the melting charge slurry of finished particle of nitrophosphate fertilizer or the melting charge slurry of nitrophosphate fertilizer returning charge granule are the big improvements of the present invention one, the product quality obtained height；
(6) composition of Mineral Elements in Jadeite Shellfish preparation of the present invention and each composition and ratio make its product preparing the present invention in above-mentioned technique be more easy to be absorbed by crop root, Fe in mineral element under above-mentioned processing step two condition2+、Mg2+、Ca2+、Mn2+、Zn2+、Cu2+Higher etc. cationic chelation percent, the utilization rate of the chelate mineral element in the nitrophosphate fertilizer obtained improves；
(7) catalyst acetic acid in Mineral Elements in Jadeite Shellfish preparation of the present invention, citric acid, tartaric acid and lactic acid can not only effective activation low-grade phosphate ores, moreover it is possible to as organic acid chelating cation, improve chelation percent；
(8) the mid low grade phosphate rock powder in Mineral Elements in Jadeite Shellfish preparation of the present invention is under the preparation technology of the present invention, its available phosphorus increases, it is easier to absorbed by crops, crop absorption ratio increases, and acetic acid in catalyst, oxalic acid or citric acid can neutralize the alkalescence around fertilizer or root system, this few crop root environment, thus improving the root system absorption to fertilizer Middle nutrition material, improves crop yield and crop quality；
(9) it is an object of the invention to by several functions bacterium, organic carbon nutrient at a certain temperature, make the phosphate rock resource of the middle-low grade containing medium trace element activate, improve the utilization rate of this part phosphate rock resource.
Detailed description of the invention
The preparation of the embodiment 1 nitrophosphate fertilizer containing medium trace element
The preparation of nitrophosphate fertilizer slurry solution: react by weight 2.2:1 with the industrial nitric acid solution that concentration is 50% and flotation phosphorus ore, prepare acid hydrolysis solution；Acid hydrolysis solution through by volute machine, washing drum and filter press reaction after insoluble matter filter；Clear liquid after filtration is chilled crystallization four water-calcium nitrate crystalline solid in a crystallizer；The four water-calcium nitrate crystallized out is removed through the CN filter degree of depth；After logical ammonia and filtration, clear liquid is neutralized reaction；After neutralization slip by vaporizer carry out multistage concentration prepare 92% concentration NP in and concentrated solution；Neutralize concentrated solution through high pressure pumping, divide two grades and squeeze into 85M tower top slip storage tank, again concentrated by whole level vaporizer through steam-coil-heater again to 170 degree slip liquid, prepare the nitrophosphate fertilizer slurry solution of 98% concentration；
(1) the nitrophosphate fertilizer slurry solution of 200kg98% concentration is flow to one-level mixing channel through tower top slip storage tank, under the temperature conditions of 160 degree, the 100kg phosphate fertilizer mix homogeneously that nitrophosphate fertilizer slip liquid and the external world add, and make phosphate fertilizer completely melted；Slip liquid after complete melting mixing is flow to two grades of mixing channels by overflow pipe；
(2) under the temperature conditions of 145 degree, the 50kg mineral element preparation mix homogeneously of melting charge slurry and extraneous addition, and make potassium fertilizer particle completely melted；With the melting charge slurry of phosphate fertilizer, mineral element preparation mix homogeneously, discharge nozzle flow to emulsator and carry out emulsifying；The uniform slurry solution of emulsifying is by expecting the pipe flow rotary nozzle to comminutor; when the comminutor speed of mainshaft is 100rpm; slip liquid throws away from rotary nozzle; slip falls through the high tower that effective depth is about 75m; being cooled down by air, slip liquid crystallization is the solid particle of diameter about 0.5～4.8MM；Solid particle sifts out the finished particle of 2.0～4.0MM by the vibrosieve that mesh size is 2.0～4.0MM, the wrapped machine of finished particle carry out anti-compaction process prepare that product surface is mellow and full, granule uniformly nitrophosphate fertilizer conforming particle containing medium trace element；The qualified nitrophosphate fertilizer product A containing medium trace element is prepared after qualified phosphorus-potassium nitrate fertilizer granule packaged machine 1#25 packaging.
Described mineral element preparation obtains by the following method: mid low grade phosphate rock powder 70%, organic carbon source 8%, zeolite 11%, brown coal 5%, catalyst 4%, adds functional microbial inoculum () 2%, and hybrid composting ferments 15-20 days；Mid low grade phosphate rock powder crosses 100 orders, and above percent is percetage by weight, and summation is 100%.
Comparative example 1 contrasts the preparation of the nitrophosphate fertilizer of chelate mineral element
According in embodiment 1 or embodiment 2 nitrophosphate fertilizer of chelate mineral element prepare formula, composition and ratio in comparative example 1-2 Mineral Elements in Jadeite Shellfish preparation, make the scope lower than embodiment 1 of the proportioning raw materials in comparative example, and in the scope described in the technical scheme not provided in the present invention, other process conditions are constant, prepare the corresponding nitrophosphate fertilizer contrasting chelate mineral element；Comparative example 4 replaces tartaric acid with sulphuric acid, and other process conditions are constant, and in table 1, unit is percetage by weight, is specifically shown in table 1；
Table 1
Comparative example 5: compared with embodiment 1, the temperature when being mixed with slip by mineral element preparation is set in 115 DEG C, and other process conditions are constant, prepares the corresponding nitrophosphate fertilizer 5 contrasting chelate mineral element；
Comparative example 6: by the low grade rock phosphate P1 that available phosphorus content is 22%, be applied in Potato cultivars nutritional solution, measures the crop root absorbance to available phosphorus.
Embodiment 3
The ground phosphate rock that available phosphorus content in comparative example 6 is 22% is replaced the ground phosphate rock in embodiment 1, and other processes are identical with embodiment 1, prepare the nitrophosphate fertilizer C containing medium trace element.
Effect example 1
Being contrasted by nitrophosphate fertilizer in above-described embodiment 1-2 and comparative example 1-5, the chelation percent of medium trace element in detection nitrophosphate fertilizer, the assay method of chelation percent adopts ion-selective electrode method, and data are in Table 2；
Table 2
As can be seen from Table 2, the process conditions in embodiment 1-2 and method is adopted to be mixed with slip by mineral element preparation, high than in comparative example 1-5 of mineral element chelation percent in the nitrophosphate fertilizer prepared, this illustrates process conditions in embodiment 1-2 and method, is more conducive in mineral element Fe2+、Mg2+、Ca2+、Mn2+、Zn2+、Cu2+Chelate is formed etc. cation；And organic carbon source bagasse and the uninteresting bacillus cereus of functional microbial inoculum and bacillus megaterium to the activation of mineral element and are chelated with good effect.
Effect example 2
In the nitrophosphate fertilizer that above-described embodiment 3 is prepared and comparative example 6 available phosphorus content be 22% ground phosphate rock P1 be applied in Potato cultivars nutritional solution, the crop root absorption to available phosphorus is measured after one month, the absorbance of available phosphorus is 10% by the Rhizoma Solani tuber osi root system of discovery comparative example 6, and the absorbance of available phosphorus is 83% by the Potato cultivars root system of embodiment 3, ground phosphate rock is prepared nitrophosphate fertilizer according to the method for the present embodiment 3 by this explanation, the utilization rate of available phosphorus improves, illustrating that fertilizer prepared by embodiment 3 process is easier to utilization absorbed by crops, fertilizer is good.Absorbance calculates by detecting the content of available phosphorus in a month front and back nutritional solution, and the detection method of available phosphorus adopts Olsen method.
Effect example 3
Test shows, after Oryza sativa L. enriches the product of embodiment 1-3, it is possible to dramatically increase rice stem tiller Seedling, strengthen the lodging tolerance of Oryza sativa L., accelerate rice growth process, strengthen paddy rice anti contravariance, single fringe knot grain number and the mass of 1000 kernel of Oryza sativa L. can also be improved, obvious effect of increasing production, output increased 15.7%, calcium improves 11.8%, silicon improves 20.1%, protein improves 8.7%, obvious effect of increasing production, and input-output ratio is high.
2 years result of the tests show and the nutrient contrast such as common fertilizer, the yield of the Plantula Brassicae chinensis of this patent product treatment, more conventional raising 12.0%, in Plantula Brassicae chinensis, the nutrient common fertilizer such as content of calcium and magnesium ratio increases by 20.3%, 11.1%, Vc content on average increases by 12.8%, and nitrate content on average reduces by 23.0%, and soil acidity or alkalinity improves 0.25 pH unit, silica-alumina ratio improves 5.0% simultaneously, and leaching loss of nutrient rate and ammonia volatilization reduce 11.8% and 17.3% respectively.
The announcement of book and instruction according to the above description, above-mentioned embodiment can also be modified and revise by those skilled in the art in the invention.Therefore, the invention is not limited in detailed description of the invention disclosed and described above, should also be as some modifications and changes of the present invention falling in the scope of the claims of the present invention.Although additionally, employ some specific terms in this specification, but these terms are intended merely to convenient explanation, and the present invention does not constitute any restriction.
Claims (9)
1. the granulation process of the nitrophosphate fertilizer of a chelate mineral element, it is characterised in that comprise the following steps:
(1) at 145～165 DEG C, phosphate fertilizer is mixed homogeneously with nitrophosphate fertilizer and obtains slip；
(2) at 140～155 DEG C, being mixed homogeneously with slip by mineral element preparation, obtain mixed slurry, the temperature of step (2) is lower than the temperature of step (1)；
(3) spray mixed slurry, obtain containing mineral element nitrophosphate fertilizer granule；
Described nitrophosphate fertilizer be by nitrophosphate fertilizer finished particle, nitrophosphate fertilizer returning charge granule or nitrophosphate fertilizer and concentrated solution heat at 135～190 DEG C after the nitrophosphate fertilizer slips that obtain；
The temperature of step (2) is lower than the temperature of step (1), and step (2) can by the remaining temperature of the slip of step (1), it is provided that a small amount of heat or heat hardly.
2. granulation process according to claim 1, it is characterised in that described nitrophosphate fertilizer finished particle is the nitrophosphate fertilizer product obtained after pelletize with concentrated solution in nitrophosphate fertilizer；Pelletize mode is biaxial granulation machine, rotary drum granulator, granulating disc or oil bath comminutor.
3. granulation process according to claim 1, it is characterised in that described nitrophosphate fertilizer returning charge granule is in nitrophosphate fertilizer and the concentrated solution returning charge granule obtained after pelletize, screening.Pelletize mode is biaxial granulation machine, rotary drum granulator, granulating disc or oil bath comminutor.
4. granulation process according to claim 1, it is characterized in that, described mineral element preparation obtains by the following method: mid low grade phosphate rock powder 65～85%, organic carbon source 5～15%, zeolite 10～15%, brown coal 5～10%, catalyst 2～5%, adding functional microbial inoculum, hybrid composting ferments 15-20 days；Mid low grade phosphate rock powder crosses 100 orders, and above percent is percetage by weight, and summation is 100%.
5. granulation process according to claim 4, it is characterised in that available phosphorus P in described mid low grade phosphate rock powder2O5Content < 26wt%.
6. granulation process according to claim 4, it is characterised in that described functional microbial inoculum is one or more in bacillus subtilis, bacillus megaterium or colloid bacillus cereus.
7. granulation process according to claim 4, it is characterised in that described organic carbon source is one or more in bagasse, manioc waste, monosodium glutamate waste liquid, tealeaf residue or peat.
8. granulation process according to claim 4, it is characterised in that the percetage by weight of described functional microbial inoculum is 1～5%.
9. the nitrophosphate fertilizer of a chelate mineral element, it is characterised in that described nitrophosphate fertilizer is prepared by the following method:
(1) at 145～165 DEG C, phosphate fertilizer is mixed homogeneously with nitrophosphate fertilizer and obtains slip；
(2) at 140～155 DEG C, being mixed homogeneously with slip by mineral element preparation, obtain mixed slurry, the temperature of step (2) is lower than the temperature of step (1)；
(3) spray mixed slurry, obtain containing mineral element nitrophosphate fertilizer granule；
Described nitrophosphate fertilizer be by nitrophosphate fertilizer finished particle, nitrophosphate fertilizer returning charge granule or nitrophosphate fertilizer and concentrated solution heat at 135～190 DEG C after the nitrophosphate fertilizer slips that obtain；
The temperature of step (2) is lower than the temperature of step (1), and step (2) can by the remaining temperature of the slip of step (1), it is provided that a small amount of heat or heat hardly；
Described mineral element preparation obtains by the following method: mid low grade phosphate rock powder 65～85%, organic carbon source 5～15%, zeolite 10～15%, brown coal 5～10%, and catalyst 2～5% adds functional microbial inoculum, and hybrid composting ferments 15-20 days；Mid low grade phosphate rock powder crosses 100 orders, and above percent is percetage by weight, and summation is 100%.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113527011A (en) * | 2020-04-13 | 2021-10-22 | 深圳市芭田生态工程股份有限公司 | Biological organic soil-improving nitrophosphate fertilizer and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104108969A (en) * | 2014-07-04 | 2014-10-22 | 贵州芭田生态工程有限公司 | Granulation method of phosphorus-potassium nitrate fertilizer |
| CN204151247U (en) * | 2014-10-25 | 2015-02-11 | 贵州芭田生态工程有限公司 | A kind of for the prilling granulator after nitrophosphate fertilizer evaporation technology |
| CN104446674A (en) * | 2014-11-10 | 2015-03-25 | 华玉叶 | Production method of nitrophosphate |
-
2016
- 2016-03-31 CN CN201610196524.1A patent/CN105777273A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104108969A (en) * | 2014-07-04 | 2014-10-22 | 贵州芭田生态工程有限公司 | Granulation method of phosphorus-potassium nitrate fertilizer |
| CN204151247U (en) * | 2014-10-25 | 2015-02-11 | 贵州芭田生态工程有限公司 | A kind of for the prilling granulator after nitrophosphate fertilizer evaporation technology |
| CN104446674A (en) * | 2014-11-10 | 2015-03-25 | 华玉叶 | Production method of nitrophosphate |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113527011A (en) * | 2020-04-13 | 2021-10-22 | 深圳市芭田生态工程股份有限公司 | Biological organic soil-improving nitrophosphate fertilizer and preparation method thereof |
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Application publication date: 20160720 |