CN108558556A - A method of preparing particle urea groups composite fertilizer with urea-sulfuric acid decomposing rock phosphate with hydrogen - Google Patents
A method of preparing particle urea groups composite fertilizer with urea-sulfuric acid decomposing rock phosphate with hydrogen Download PDFInfo
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- CN108558556A CN108558556A CN201810722694.8A CN201810722694A CN108558556A CN 108558556 A CN108558556 A CN 108558556A CN 201810722694 A CN201810722694 A CN 201810722694A CN 108558556 A CN108558556 A CN 108558556A
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- 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
- C05G3/60—Biocides or preservatives, e.g. disinfectants, pesticides or herbicides; Pest repellants or attractants
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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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Abstract
The present invention relates to a kind of method preparing particle urea groups composite fertilizer with urea-sulfuric acid decomposing rock phosphate with hydrogen, this method includes that prepared by urea-sulfuric acid aqueous solution, ground phosphate rock decomposes, physical property conditioning agent is added and granulation.The ground phosphate rock conversion ratio of the method for the present invention reaches 80% or more；Gas phase boiling point drops to 7% hereinafter, effectively reducing the uncontrollable discharge and environmental improvement expense of fluorine by the 40% of original sour mine reaction；By adding physical property conditioning agent, solves the problems, such as that nitrogen phosphorus binary fertilizer slurry can be used directly as individual nitrogen phosphorus binary fertilizer or be added materials as compound fertilizer production and use；Fluorine exists in the form of fluosilicic acid urea in particle urea groups of the present invention composite fertilizer, has both pesticide, insecticidal action, reduces chemical pesticide dosage, cost-saving synergistic.
Description
【Technical field】
The invention belongs to technical field of fertilizer production.More particularly it relates to which a kind of using urea-sulfuric acid decomposing rock phosphate with hydrogen
The method for preparing particle urea groups composite fertilizer.
【Background technology】
Traditional calcium superphosphate production process uses sulfuric acid decomposition ground phosphate rock, fierce due to starting sour mine reaction, generates a large amount of
Calcium sulfate wraps up, and there are phosphorus initial stage conversion ratio is low, the maturation period is long and a large amount of uncontrollable discharge gas for generating can not handle and product
The problem of easily luming, and calcium superphosphate is single phosphate fertilizer, and Production of Single Superphosphate enterprise is caused to face transition and upgrade pressure.
The discharge of fluorine can effectively be inhibited according to urea-sulfuric acid decomposing rock phosphate with hydrogen, and nitrogen phosphorus binary fertilizer can be produced, the present invention passes through
Lot of experiments and analysis work, it is proposed that use urea-sulfuric acid decomposing rock phosphate with hydrogen, physical property conditioning agent is added, improve physical property, directly
Produce the new process of urea groups compound fertilizer.
【Invention content】
[technical problems to be solved]
The object of the present invention is to provide a kind of methods preparing particle urea groups composite fertilizer with urea-sulfuric acid decomposing rock phosphate with hydrogen.
[technical solution]
The present invention is achieved through the following technical solutions.
The present invention relates to a kind of methods preparing particle urea groups composite fertilizer with urea-sulfuric acid decomposing rock phosphate with hydrogen.The preparation method
Steps are as follows：
A, prepared by urea-sulfuric acid aqueous solution
Solid urea, sulfuric acid and water are according to molar ratio 2.0~4.0：1.0：1.0 mixed dissolutions obtain a kind of urea-sulfuric acid water
Solution；
B, ground phosphate rock decomposes
Ground phosphate rock is added into the urea-sulfuric acid aqueous solution that step A is obtained, then at 70~85 DEG C of temperature reaction 3~
20min obtains a kind of acid slime；
C, additive is added
Physical property conditioning agent, 1~3min of hybrid reaction, subsequently into formation chamber are added into the acid slime that step B is obtained
Cure 0.5~1.0h, obtains a kind of nitrogen phosphorus binary fertilizer material；
D, it is granulated
Potash fertilizer is added into the nitrogen phosphorus binary fertilizer material that step C is obtained, the mixing granulation in comminutor, dry, screening obtains
To the particle urea groups composite fertilizer.
A preferred embodiment of the invention, in step, the concentration of the sulfuric acid be by weight 93~
98%.
According to another preferred method of implementation of the present invention, in stepb, the P of the ground phosphate rock2O5Content is with weight
Meter 15~30%.
According to another preferred method of implementation of the present invention, in stepb, the granularity of the ground phosphate rock is that -100 mesh are
95% or more.
According to another preferred method of implementation of the present invention, in stepb, the weight ratio of urea-sulfuric acid aqueous solution and ground phosphate rock
It is 1.0~2.2：1.0.
According to another preferred method of implementation of the present invention, in step C, the physical property conditioning agent is one or more
Selected from lime stone, dolomite, serpentine, potassium feldspar, ground phosphate rock, weathered coal, peat, lignite, ammonium hydrogen carbonate, humic acid or calcium and magnesium
The additive of phosphate fertilizer.
According to another preferred method of implementation of the present invention, in step C, the additive amount of the physical property conditioning agent is urea groups
The 5%~10% of composite fertilizer's total weight.
According to another preferred method of implementation of the present invention, in step D, the potash fertilizer is potassium chloride or potassium sulfate.
According to another preferred method of implementation of the present invention, in step D, the urea groups composite fertilizer of mixing granulation is in temperature 60
Dry 0.5~2h under the conditions of~90 DEG C.
According to another preferred method of implementation of the present invention, in step D, urea groups granular compound fertilizer grain diameter is 1.0
~4.75mm.
The present invention is described in more detail below.
The present invention relates to a kind of methods preparing particle urea groups composite fertilizer with urea-sulfuric acid decomposing rock phosphate with hydrogen.This method is in original
There is a kind of production method for the New Type Urea base composite fertilizer developed on the basis of " manufacturing method of clean urea-sulfuricacid compound-mixed fertilizer ".
It is as follows that this prepares the step of method of particle urea groups composite fertilizer：
A, prepared by urea-sulfuric acid aqueous solution
Solid urea, sulfuric acid and water are according to molar ratio 2.0~4.0：1.0：1.0 mixed dissolutions obtain a kind of urea-sulfuric acid water
Solution；
The present invention is by weight 93~98% using the concentration of sulfuric acid.
In the present invention, if the dosage of solid urea be less than 2.0, nitrogen phosphorus binary fertilizer slurry solidification the time required to compared with
It is long, the requirement of technique is not achieved；If the dosage of solid urea is more than 4.0, ground phosphate rock conversion ratio can substantially reduce；Therefore,
The dosage of solid urea be 2.0~4.0 be it is feasible, preferably 2.6~3.6, more preferably 2.8~3.2.
B, ground phosphate rock decomposes
Ground phosphate rock is added into the urea-sulfuric acid aqueous solution that step A is obtained, then at 70~85 DEG C of temperature reaction 3~
20min obtains a kind of acid slime；
The ground phosphate rock that the present invention uses is, for example, the ground phosphate rock of Yunnan Yuntianhua (group) Co., Ltd, ground phosphate rock
P2O5Content is by weight 15~30%, and it is 95% or more that the granularity of the ground phosphate rock, which is (150 μm) of -100 mesh,.
In this step, the weight ratio of urea-sulfuric acid aqueous solution and ground phosphate rock is 1.0~2.2：1.0.If urea-sulfuric acid water
The weight ratio of solution and ground phosphate rock is less than 1.0：1.0, then nitrogen phosphorus binary fertilizer slurry be difficult to cure；If urea-sulfuric acid aqueous solution and phosphorus
The weight ratio of miberal powder is more than 2.2：1.0, then ground phosphate rock conversion ratio can substantially reduce；Therefore, urea-sulfuric acid aqueous solution and ground phosphate rock
Weight ratio is 1.0~2.2：1.0 is suitable, and preferably 1.2~2.0：1.0, more preferably 1.4~1.8：1.0.
In this step, the urea-sulfuric acid aqueous solution described in ground phosphate rock use decompose 3 at 70~85 DEG C of temperature~
20min.If ground phosphate rock decomposition temperature is less than 70 DEG C, ground phosphate rock conversion ratio is relatively low；If ground phosphate rock decomposition temperature is higher than 85
DEG C, then it is larger to decompose loss for urea, and temperature is higher easy tos produce biuret；Therefore, ground phosphate rock decomposition temperature is 70~85 DEG C
It is feasible；Preferably 72~82 DEG C, more preferably 74~80 DEG C.
Similarly, if the ground phosphate rock resolving time is less than 3min, ground phosphate rock conversion ratio is relatively low；If ground phosphate rock decomposes
Between be longer than 20min, then nitrogen phosphorus binary fertilizer slurry can cure, it is difficult to overflow to formation chamber；Therefore, the ground phosphate rock resolving time be 3~
20min is feasible；Preferably 5~18min, more preferably 8~15min.
It is detected using the assay method of NY/T 1973-2010 water-soluble fertilizers water insoluble matter contents and pH, the acid slime
PH be 1.0~2.5.
C, additive is added
Physical property conditioning agent, 1~3min of hybrid reaction, subsequently into formation chamber are added into the acid slime that step B is obtained
Cure 0.5~1.0h, obtains a kind of nitrogen phosphorus binary fertilizer material；
In the present invention, the physical property conditioning agent is it should be understood that a kind of can make the physical aspect of slurry keep meeting
Technical process needs and the additive of addition.
In this step, the physical property conditioning agent is one or more selected from lime stone, dolomite, serpentine, potassium
The additive of feldspar, ground phosphate rock, weathered coal, peat, lignite, ammonium hydrogen carbonate, humic acid or calcium magnesium phosphate.
The additive amount of the physical property conditioning agent is the 5%~10% of urea groups composite fertilizer total weight.If physical property conditioning agent adds
Dosage is less than 5%, then the solidification of nitrogen phosphorus binary fertilizer slurry is bad；If physical property conditioning agent additive amount is higher than 10%, nitrogen phosphorus binary
The solidification of fertilizer slurry is quickly, it is difficult to be delivered to formation chamber；Therefore, it is appropriate that physical property conditioning agent additive amount, which is 5%~10%,；It is preferred that
Ground is 6%~8%.
In the present invention, the hybrid reaction of acid slime and physical property conditioning agent is in physical property conditioning agent and nitrogen phosphorus binary fertilizer
Starch the reaction of part free acid.If the hybrid reaction time is shorter than 1min, neutralize incomplete；If the hybrid reaction time
It is longer than 3min, then nitrogen phosphorus binary fertilizer slurry cures rapidly, it is difficult to overflow to formation chamber；Therefore, the hybrid reaction time be 1~
3min is suitable；
In the present invention, the curing reaction in formation chamber is it should be understood that a kind of nitrogen phosphorus binary fertilizer slurry becomes from liquid solid-state
For solid reaction.If the curing reaction time is shorter than 0.5h, the solidification of nitrogen phosphorus binary fertilizer slurry is incomplete；If the solidification is anti-
It is longer than 1.0h between seasonable, then nitrogen phosphorus binary fertilizer slurry cure hard, it is difficult to draw off material from formation chamber；Therefore, the curing reaction
Time is that 0.5~1.0h is suitable；Preferably 0.6~0.8h.
It is determined using XRD diffraction standard analysis methods, the nitrogen phosphorus binary fertilizer material that the step obtains contains urea phosphoric acid
The substances such as calcium dihydrogen, four urea sulfate calcium and fluosilicic acid urea.
D, it is granulated
Potash fertilizer is added into the nitrogen phosphorus binary fertilizer material that step C is obtained, the mixing granulation in comminutor, dry, screening obtains
To the particle urea groups composite fertilizer.
In this step, the potash fertilizer is potassium chloride or potassium sulfate.
Certainly, those skilled in the art can make according to many situation selections such as actual soil, crop, weather
With other potash fertilizer, also within protection scope of the present invention, the selection of these potash fertilizer is for the art for these potash fertilizer
Any technology barrier is not present for technical staff, is easy to implement.
The additive amount of the potash fertilizer can also be selected according to many situations such as actual soil, crop, weather, this
Any technical difficulty is not present in selection for those skilled in the art, is easy to implement.
In this step, the urea groups composite fertilizer of mixing granulation dry 1~2h under the conditions of 60~90 DEG C of temperature, to reach
The water content of urea groups composite fertilizer is by weight 2% or less.The water content of urea groups composite fertilizer is multiple according to GB/T 8576-2010
The measurement Vacuum oven method standard method of analysis of free water content is detected in complex fertilizer material.
The urea groups granular compound fertilizer grain diameter is 1.0~4.75mm.
In the present invention, urea groups granular compound fertilizer is granulated, equipment is all technical field of fertilizers used in dry and screening
In usually used equipment, such as be bestowed by heaven the model that heavy industry Machinery Co., Ltd. sold with trade name granulating disc by Zhengzhou City
For the compound fertilizer disk granulator of ZL08-ZL45；It is sold with trade name rotary shelf drier by Shandong Hua Yi heavy industrys Co., Ltd
Model HGZ1210-HGZ3830 composite fertilizer's drying equipment；By Shandong Hua Yi heavy industrys Co., Ltd with trade name vibration point
The screening compound fertilizer equipment of the model HZS20-HZS100 of grade sieve sale.
Available phosphorus content is measured according to the bioassay standard method of available phosphorus content in GB/T 8573-2010 complex fertilizers, is used
Chloroazotic acid (HCl:HNO3=3:1) molten sample measures total phosphorus content standard method with quinoline molybdenum lemon ketone gravimetric method and is calculated by following formula
To ground phosphate rock conversion ratio：
In formula：
XpIt is phosphorus ore conversion ratio, %；
A is represented by the P of phosphorus ore after the decomposition of urea aqueous solution of nitric acid2O5Content, %；
T represents the P of former phosphorus ore2O5Content, %；
According in GB/T 32954-2016 fertilizer fluoride measurement --- fluorescence spectrophotometric method standard method is under
It states formula and boiling point is calculated：
In formula：
WFIt is the effusion rate of fluorine, %
m1--- the quality of reaction effusion gas phase fluorine, g；
M --- the total amount that phosphorus ore brings fluorine into, g is added.
The present invention be developed on the basis of original " manufacturing method of clean urea-sulfuricacid compound-mixed fertilizer " one kind it is novel
The production method of urea groups composite fertilizer.This method utilize urea-sulfuric acid decomposing rock phosphate with hydrogen, it is fresh fertilizer in phosphorus conversion ratio can reach 80% with
On, it saves former Production of Single Superphosphate device 7-15 days, or even the longer time banks up the maturation period, is then able to reduction curing library face
Product；In addition, by adding physical property conditioning agent, solve the problems, such as that general calcium product is being stored and easily lumpd in transportational process；
Boiling point substantially reduces, and gas phase boiling point drops to 7% or less by original 40%；Product of the present invention also retains former calcium superphosphate
The advantages of multielement, also contains active Ca, Mg, S, solubility SiO in addition to N, P, K2And various trace elements etc., nutrient is more complete
Face；Fluorine exists in the form of fluosilicic acid urea in product of the present invention, has both pesticide, insecticidal action, reduces chemical pesticide dosage, and abridged edition increases
Effect.This method is a kind of production method of the urea groups composite fertilizer of energy-saving and environmental protection Synergistic type, meets the hair of China's green ecological fertilizer
Exhibition requires.
[advantageous effect]
The beneficial effects of the invention are as follows：The present invention is made with the method that urea-sulfuric acid decomposing rock phosphate with hydrogen prepares particle urea groups composite fertilizer
The conversion ratio of phosphorus can reach 80% or more in fresh fertilizer, saves former Production of Single Superphosphate device and banks up the maturation period for 7-15 days, then can
Enough reduction curing library areas；Gas phase boiling point drops to 7% hereinafter, effectively reducing fluorine by the 40% of original phosphate rock-sulfuric acid powder
Uncontrollable discharge and environmental improvement expense；By adding physical property conditioning agent, solving nitrogen phosphorus binary fertilizer slurry can be directly as
Individual nitrogen phosphorus binary fertilizer uses or produces the problem of the using that add materials as compound fertilizer；Product of the present invention, which also has, contains a variety of battalion
The advantages of supporting element also contains active Ca, Mg, S, solubility SiO in addition to containing N, P, K2And various trace elements etc., nutrient
More comprehensively；Fluorine exists in the form of fluosilicic acid urea in product of the present invention, has both pesticide, insecticidal action, reduces chemical pesticide dosage, section
This synergy.
【Specific implementation mode】
The present invention is will be better understood that by following embodiments.
Embodiment 1：Particle urea groups composite fertilizer is prepared with urea-sulfuric acid decomposing rock phosphate with hydrogen
The implementation steps of the embodiment are as follows：
A, prepared by urea-sulfuric acid aqueous solution
Solid urea, a concentration of 93% sulfuric acid by weight and water are according to molar ratio 2.0：1.0：1.0 mixed dissolutions, obtain
To a kind of urea-sulfuric acid aqueous solution；
B, ground phosphate rock decomposes
Weight ratio according to urea-sulfuric acid aqueous solution and ground phosphate rock is 2.0：1.0, into the urea-sulfuric acid aqueous solution that step A is obtained
It is -100 mesh up to 95.0%, P that granularity, which is added,2O5The ground phosphate rock that content is by weight 26% then reacts at 82 DEG C of temperature
6min obtains a kind of acid slime；It is examined using the assay method of NY/T1973-2010 water-soluble fertilizers water insoluble matter content and pH
It surveys, the pH of the acid slime is 1.6.
D, additive is added
According to 8% that physical property conditioning agent additive amount is urea groups composite fertilizer total weight, add into the acid slime that step B is obtained
Enter ammonium hydrogen carbonate physical property conditioning agent, hybrid reaction 1min cures 0.5h subsequently into formation chamber, obtains a kind of nitrogen phosphorus binary fertilizer object
Material；
D, it is granulated
Potassium chloride potash fertilizer, the mixing granulation in comminutor, in temperature are added into the nitrogen phosphorus binary fertilizer material that step C is obtained
Dry 1.6h, screening under the conditions of 75 DEG C, obtain the particle urea groups composite fertilizer that grain diameter is 1.0~4.75mm.
It is determined according to detection method analysis described in this specification, the ground phosphate rock conversion ratio of the embodiment is 85%；Fluorine
Effusion rate is 1.33%.
Embodiment 2：Particle urea groups composite fertilizer is prepared with urea-sulfuric acid decomposing rock phosphate with hydrogen
The implementation steps of the embodiment are as follows：
A, prepared by urea-sulfuric acid aqueous solution
Solid urea, a concentration of 98% sulfuric acid by weight and water are according to molar ratio 2.4：1.0：1.0 mixed dissolutions, obtain
To a kind of urea-sulfuric acid aqueous solution；
B, ground phosphate rock decomposes
Weight ratio according to urea-sulfuric acid aqueous solution and ground phosphate rock is 1.0:1, add into the urea-sulfuric acid aqueous solution that step A is obtained
It is -100 mesh up to 95.6%, P to enter granularity2O5The ground phosphate rock that content is by weight 15% then reacts at 80 DEG C of temperature
10min obtains a kind of acid slime；It is examined using the assay method of NY/T 1973-2010 water-soluble fertilizers water insoluble matter contents and pH
It surveys, the pH of the acid slime is 1.8.
E, additive is added
According to 5% that physical property conditioning agent additive amount is urea groups composite fertilizer total weight, add into the acid slime that step B is obtained
Enter lime stone physical property conditioning agent, hybrid reaction 3min cures 1.0h subsequently into formation chamber, obtains a kind of nitrogen phosphorus binary fertilizer object
Material；
D, it is granulated
Potassium sulfate potash fertilizer, the mixing granulation in comminutor, in temperature are added into the nitrogen phosphorus binary fertilizer material that step C is obtained
Dry 1.8h, screening under the conditions of 60 DEG C, obtain the particle urea groups composite fertilizer that grain diameter is 1.0~4.75mm.
It is determined according to detection method analysis described in this specification, the ground phosphate rock conversion ratio of the embodiment is 76.3%；
Boiling point is 1.58%.
Embodiment 3：Particle urea groups composite fertilizer is prepared with urea-sulfuric acid decomposing rock phosphate with hydrogen
The implementation steps of the embodiment are as follows：
A, prepared by urea-sulfuric acid aqueous solution
Solid urea, a concentration of 96% sulfuric acid by weight and water are according to molar ratio 4.0：1.0：1.0 mixed dissolutions, obtain
To a kind of urea-sulfuric acid aqueous solution；
B, ground phosphate rock decomposes
Weight ratio according to urea-sulfuric acid aqueous solution and ground phosphate rock is 2.2：1.0, into the urea-sulfuric acid aqueous solution that step A is obtained
It is -100 mesh up to 96.2%, P that granularity, which is added,2O5The ground phosphate rock that content is by weight 30%, then reacts under temperature 70 C
20min obtains a kind of acid slime；It is examined using the assay method of NY/T1973-2010 water-soluble fertilizers water insoluble matter content and pH
It surveys, the pH of the acid slime is 2.1.
F, additive is added
According to 6% that physical property conditioning agent additive amount is urea groups composite fertilizer total weight, add into the acid slime that step B is obtained
Enter dolomite physical property conditioning agent, hybrid reaction 2min cures 0.8h subsequently into formation chamber, obtains a kind of nitrogen phosphorus binary fertilizer object
Material；
D, it is granulated
Potassium sulfate potash fertilizer, the mixing granulation in comminutor, in temperature are added into the nitrogen phosphorus binary fertilizer material that step C is obtained
Dry 2.0h, screening under the conditions of 70 DEG C, obtain the particle urea groups composite fertilizer that grain diameter is 1.0~4.75mm.
It is determined according to detection method analysis described in this specification, the ground phosphate rock conversion ratio of the embodiment is 82.8%；
Boiling point is 1.50%.
Embodiment 4：Particle urea groups composite fertilizer is prepared with urea-sulfuric acid decomposing rock phosphate with hydrogen
The implementation steps of the embodiment are as follows：
A, prepared by urea-sulfuric acid aqueous solution
Solid urea, a concentration of 98% sulfuric acid by weight and water are according to molar ratio 2.8：1.0：1.0 mixed dissolutions, obtain
To a kind of urea-sulfuric acid aqueous solution；
B, ground phosphate rock decomposes
Weight ratio according to urea-sulfuric acid aqueous solution and ground phosphate rock is 1.8：1.0, into the urea-sulfuric acid aqueous solution that step A is obtained
It is -100 mesh up to 95.8%, P that granularity, which is added,2O5The ground phosphate rock that content is by weight 18% then reacts at 85 DEG C of temperature
20min obtains a kind of acid slime；It is examined using the assay method of NY/T1973-2010 water-soluble fertilizers water insoluble matter content and pH
It surveys, the pH of the acid slime is 1.0；
G, additive is added
According to 10% that physical property conditioning agent additive amount is urea groups composite fertilizer total weight, into the acid slime that step B is obtained
Lignite physical property conditioning agent is added, hybrid reaction 3min cures 0.6h subsequently into formation chamber, obtains a kind of nitrogen phosphorus binary fertilizer object
Material；
D, it is granulated
Potassium chloride potash fertilizer, the mixing granulation in comminutor, in temperature are added into the nitrogen phosphorus binary fertilizer material that step C is obtained
Dry 1.2h, screening under the conditions of 80 DEG C, obtain the particle urea groups composite fertilizer that grain diameter is 1.0~4.75mm.
It is determined according to detection method analysis described in this specification, the ground phosphate rock conversion ratio of the embodiment is 83.6%；
Boiling point is 1.28%.
Embodiment 5：Particle urea groups composite fertilizer is prepared with urea-sulfuric acid decomposing rock phosphate with hydrogen
The implementation steps of the embodiment are as follows：
A, prepared by urea-sulfuric acid aqueous solution
Solid urea, a concentration of 96% sulfuric acid by weight and water are according to molar ratio 3.6：1.0：1.0 mixed dissolutions, obtain
To a kind of urea-sulfuric acid aqueous solution；
B, ground phosphate rock decomposes
Weight ratio according to urea-sulfuric acid aqueous solution and ground phosphate rock is 1.4：1.0, into the urea-sulfuric acid aqueous solution that step A is obtained
It is -100 mesh up to 96.8%, P that granularity, which is added,2O5The ground phosphate rock that content is by weight 22% then reacts at 78 DEG C of temperature
14min obtains a kind of acid slime；It is examined using the assay method of NY/T1973-2010 water-soluble fertilizers water insoluble matter content and pH
It surveys, the pH of the acid slime is 1.4；
H, additive is added
According to 8% that physical property conditioning agent additive amount is urea groups composite fertilizer total weight, add into the acid slime that step B is obtained
Enter humic acid physical property conditioning agent, hybrid reaction 2min cures 0.7h subsequently into formation chamber, obtains a kind of nitrogen phosphorus binary fertilizer object
Material；
D, it is granulated
Potassium chloride potash fertilizer, the mixing granulation in comminutor, in temperature are added into the nitrogen phosphorus binary fertilizer material that step C is obtained
Dry 1.4h, screening under the conditions of 90 DEG C, obtain the particle urea groups composite fertilizer that grain diameter is 1.0~4.75mm.
It is determined according to detection method analysis described in this specification, the ground phosphate rock conversion ratio of the embodiment is 80.2%；
Boiling point is 1.47%.
Embodiment 6：Particle urea groups composite fertilizer is prepared with urea-sulfuric acid decomposing rock phosphate with hydrogen
The implementation steps of the embodiment are as follows：
A, prepared by urea-sulfuric acid aqueous solution
Solid urea, a concentration of 98% sulfuric acid by weight and water are according to molar ratio 3.2：1.0：1.0 mixed dissolutions, obtain
To a kind of urea-sulfuric acid aqueous solution；
B, ground phosphate rock decomposes
Weight ratio according to urea-sulfuric acid aqueous solution and ground phosphate rock is 1.6：1.0, into the urea-sulfuric acid aqueous solution that step A is obtained
It is -100 mesh up to 95.4%, P that granularity, which is added,2O5The ground phosphate rock that content is by weight 24% then reacts at 74 DEG C of temperature
18min obtains a kind of acid slime；It is examined using the assay method of NY/T1973-2010 water-soluble fertilizers water insoluble matter content and pH
It surveys, the pH of the acid slime is 2.5；
I, additive is added
According to 9% that physical property conditioning agent additive amount is urea groups composite fertilizer total weight, add into the acid slime that step B is obtained
Enter calcium magnesium phosphate physical property conditioning agent, hybrid reaction 1min cures 1.0h subsequently into formation chamber, obtains a kind of nitrogen phosphorus binary fertilizer object
Material；
D, it is granulated
Potassium chloride or potassium sulfate potash fertilizer are added into the nitrogen phosphorus binary fertilizer material that step C is obtained, mixes and makes in comminutor
Grain, dry 1.0h, screening under the conditions of 85 DEG C of temperature, obtains the particle urea groups composite fertilizer that grain diameter is 1.0~4.75mm.
It is determined according to detection method analysis described in this specification, the ground phosphate rock conversion ratio of the embodiment is 78.0%；
Boiling point is 1.39%.
Claims (10)
1. a kind of method preparing particle urea groups composite fertilizer with urea-sulfuric acid decomposing rock phosphate with hydrogen, it is characterised in that the step of this method such as
Under：
A, prepared by urea-sulfuric acid aqueous solution
Solid urea, sulfuric acid and water are according to molar ratio 2.0~4.0：1.0：1.0 mixed dissolutions obtain a kind of urea-sulfuric acid aqueous solution；
B, ground phosphate rock decomposes
Ground phosphate rock is added into the urea-sulfuric acid aqueous solution that step A is obtained, 3~20min is then reacted at 70~85 DEG C of temperature, is obtained
To a kind of acid slime；
C, additive is added
Physical property conditioning agent is added into the acid slime that step B is obtained, 1~3min of hybrid reaction cures subsequently into formation chamber
0.5~1.0h obtains a kind of nitrogen phosphorus binary fertilizer material
D, it is granulated
Potash fertilizer is added into the nitrogen phosphorus binary fertilizer material that step C is obtained, the mixing granulation in comminutor, dry, screening obtains institute
The particle urea groups composite fertilizer stated.
2. according to the method described in claim 1, it is characterized in that in step, the concentration of the sulfuric acid is by weight 93
~98%.
3. according to the method described in claim 1, it is characterized in that in stepb, the P of the ground phosphate rock2O5Content is with weight
Meter 15~30%.
4. according to the method described in claim 1, it is characterized in that in stepb, the granularity of the ground phosphate rock is that -100 mesh are
95% or more.
5. according to the method described in claim 1, it is characterized in that in stepb, the weight of urea-sulfuric acid aqueous solution and ground phosphate rock
Than being 1.0~2.2：1.0.
6. according to the method described in claim 1, it is characterized in that in step C, the physical property conditioning agent is a kind of or more
Kind is selected from lime stone, dolomite, serpentine, potassium feldspar, ground phosphate rock, weathered coal, peat, lignite, ammonium hydrogen carbonate, humic acid or calcium
The additive of magnesium-phosphorus fertilizer.
7. according to the method described in claim 1, it is characterized in that in step C, the additive amount of the physical property conditioning agent is
The 5%~10% of urea groups composite fertilizer total weight.
8. according to the method described in claim 1, it is characterized in that in step D, the potash fertilizer is potassium chloride or potassium sulfate.
9. according to the method described in claim 1, it is characterized in that in step D, the urea groups composite fertilizer of mixing granulation is in temperature
Dry 0.5~2h under the conditions of 60~90 DEG C.
10. according to the method described in claim 1, it is characterized in that in step D, urea groups granular compound fertilizer grain diameter is
1.0~4.75mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810722694.8A CN108558556A (en) | 2018-07-04 | 2018-07-04 | A method of preparing particle urea groups composite fertilizer with urea-sulfuric acid decomposing rock phosphate with hydrogen |
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| CN114286807A (en) * | 2019-07-12 | 2022-04-05 | 沙特基础工业全球技术公司 | Phosphoric acid urea calcium sulfate particles and methods of making and using the same |
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