CN111122375A - Method for rapidly measuring adhesion of anti-caking agent on surface of granular fertilizer - Google Patents
Method for rapidly measuring adhesion of anti-caking agent on surface of granular fertilizer Download PDFInfo
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- CN111122375A CN111122375A CN201911394373.0A CN201911394373A CN111122375A CN 111122375 A CN111122375 A CN 111122375A CN 201911394373 A CN201911394373 A CN 201911394373A CN 111122375 A CN111122375 A CN 111122375A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N5/00—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N19/00—Investigating materials by mechanical methods
- G01N19/04—Measuring adhesive force between materials, e.g. of sealing tape, of coating
Abstract
The invention discloses a method for rapidly measuring the adhesion of an anti-caking agent on the surface of a granulated fertilizer, which comprises the following steps: uniformly coating the anti-caking agent to be detected on the granulated fertilizer; weighing the wrapped fertilizer, placing the fertilizer in a wheel drum of a friability tester, setting the rotating speed and the rotating time, taking out the fertilizer after the rotation is finished, screening the fertilizer by using a sieve with the particle size of 1.00mm, weighing the weight of the fertilizer on the sieve, and calculating the mass fraction ratio of the adhesive force of the anticaking agent on the surface of the granulated fertilizer. The method has the advantages of simple flow, convenient operation, strong detection data foundation and high reference value, and can truly reflect the adhesive capacity of the anticaking agent on the surface of the fertilizer. By measuring the mass fraction ratio of the adhesion force of the anti-caking agent on the surface of the granulated fertilizer, the coating and spreading uniformity and the anti-caking application effect of the anti-caking agent are judged in advance, and the anti-caking agent is used as a reference for designing the formula of the anti-caking agent, and is used for screening the optimal applicable type of the anti-caking agent and guiding the addition amount of the anti-caking agent, so that the anti-caking effect of the fertilizer is improved, and the environmental pollution caused.
Description
Technical Field
The invention relates to a method for rapidly determining the adhesion of an anticaking agent on the surface of a granulated fertilizer, belonging to the technical field of fertilizer package detection methods.
Background
With the development of the fertilizer market, the phosphorus ore resource is gradually lacked, the interference of impurities to the fertilizer is large, and the fertilizer is easy to agglomerate. The caking not only influences the quality and appearance of the fertilizer, brings troubles to storage, transportation and fertilization of production enterprises, but also causes great inconvenience to users.
At present, in the production process of production enterprises, in order to prevent the problems of caking, moisture absorption, pulverization and the like of fertilizers, the problems are solved by wrapping anticaking agents on the fertilizers. The excellent anti-caking agent has good adhesive force and coating effect after being coated on the fertilizer, and does not shed powder, drop powder or raise powder in the processes of storage, transportation and use, thereby having no dust pollution to the environment; in addition, the anti-caking agent has good adhesive force, and can completely coat the surface of the granulated fertilizer, prevent the alternation of water inside and outside the fertilizer, prevent the interference of the external environment, better play the anti-caking performance and ensure that the fertilizer does not cake.
In order to better ensure the anti-caking effect of the anti-caking agent, the quality index control is particularly important, at present, relevant indexes such as the density and the anti-caking performance of the anti-caking agent can be detected and quantified, key indexes of the adhesion force of the anti-caking agent on the surface of the fertilizer and the coating effect are referred, a systematic detection method and an evaluation standard are not referred by referring to a large amount of patent, journal, magazine, paper and other literature data, data quantification is not referred, evaluation is only carried out through appearance sense under common conditions, and the artificial judgment and the light interference are large.
Disclosure of Invention
The invention aims to provide a method for rapidly measuring the adhesion of an anti-caking agent on the surface of a granular fertilizer. The method determines the mass fraction ratio of the adhesion force of the anti-caking agent on the surface of the granulated fertilizer, judges the coating and spreading uniformity and the anti-caking application effect of the anti-caking agent on the fertilizer in advance, is used as a reference for the formula design of the anti-caking agent, screens the applicable model of the optimal anti-caking agent and guides the addition amount of the anti-caking agent, achieves the purposes of improving the anti-caking effect of the fertilizer, and has no dust and no pollution to the environment.
At present, fertilizer production enterprises mainly produce organic and inorganic fertilizers such as urea, calcium superphosphate, triple superphosphate, monoammonium phosphate, diammonium phosphate, potash fertilizer, compound (mixed) fertilizer or medium and trace element fertilizer, different manufacturers and different fertilizer varieties, because production raw materials, process control, moisture content, granule strength, wrapping temperature and the like are different, the types and the adding amounts of the anti-caking agents are different, in order to find a method for rapidly measuring the surface adhesive force and the coating effect of the anti-caking agents on the granular fertilizer, the technical personnel continuously search and examine through experiments and detection data analysis and research in the daily research and development process, find that the anti-caking agents are uniformly coated on the granular fertilizer, weigh the coated fertilizer, place the fertilizer in a wheel drum of a friability tester with sweeping plates, set the rotating speed and the rotating time, and utilize the granular fertilizer coated with the anti-caking agents under the driving principle of the baffle plates in the process of the wheel drum rotating continuously, the anti-caking agent coated on the particle surface is continuously and repeatedly rotated, rolled, impacted and slid, the anti-caking agent is continuously rubbed, if the adhesion force of the anti-caking agent on the surface of the fertilizer is not strong or a layer of anti-caking agent film coated on the fertilizer is incomplete, the anti-caking agent can slowly fall off, or dust on the particle surface of the fertilizer can fall off along with the anti-caking agent coated film, a fertilizer sample is taken out, a sieve with the particle size of 1.00mm is used for sieving, undersize materials are fine materials with poor adhesion force, oversize materials are fertilizers coated by the anti-caking agent with strong adhesion force, the weight of the oversize materials and the weight of the fertilizers are precisely weighed, and the mass percentage of the. In the process of establishing the detection method, the same granular fertilizer is wrapped with the same anti-caking agent, a certain weight of the anti-caking agent is weighed and then the anti-caking agent rotates in a wheel drum with the same diameter of a friability tester, the operation is carried out according to the process, the repeated detection and verification are carried out, and a large amount of experimental data prove that the detection method detects that the adhesive force effect of the anti-caking agent on the surface of the same granular fertilizer is stable, the parallel measurement deviation can be controlled within 0.05%, the detection data have strong reference and high reliability, the detection and the evaluation can be carried out rapidly within 0.5-3 h, the efficiency is high, and the consumed time is short.
In the whole research and exploration process, a large amount of experiments and data accumulation are carried out on the surface adhesion of the anti-caking agent on the granulated fertilizer, and the specific data are listed as follows:
a first group: determination of adhesion of powdery anti-caking agent on surface of granulated fertilizer
1. The powdery anti-caking agent is wrapped on the surface of the urea-based high-tower compound fertilizer 17-17-17, and the experimental result is as follows:
2. the powdery anti-caking agent is coated on the surface of the diammonium phosphate fertilizer, and the experimental result is as follows:
3. the powdery anti-caking agent is wrapped on the surface of the monoammonium phosphate fertilizer, and the experimental result is as follows:
4. the powdery anti-caking agent is wrapped on the surface of the urea fertilizer, and the experimental result is as follows:
5. the powdery anticaking agent is coated on the surface of the calcium superphosphate fertilizer, and the experimental result is as follows:
6. the powdery anti-caking agent is wrapped on the surface of the nitro-high tower compound fertilizer (30-5-5), and the experimental result is as follows:
second group: determination of adhesion of oily anti-caking agent on surface of granulated fertilizer
1. The oily anti-caking agent is coated on the surface of the diammonium phosphate fertilizer, and the experimental result is as follows:
2. the oily anticaking agent is coated on the surface of the triple superphosphate fertilizer, and the experimental result is as follows:
3. the oily anti-caking agent is wrapped on the surface of the monoammonium phosphate fertilizer, and the experimental result is as follows:
4. the oily anti-caking agent is taken as an example of a rotary drum compound fertilizer (15-15-15), and the experimental result is as follows:
5. the oily anti-caking agent is wrapped on the surface of the urea fertilizer, and the experimental result is as follows:
6. the oily anticaking agent is wrapped on the surface of the extruded and granulated potassium chloride fertilizer, and the experimental result is as follows:
aiming at different fertilizer varieties produced by different manufacturers, a large amount of experimental groping and accumulated data show that: the same anti-caking agent is used for different fertilizer varieties, and the characteristics of the fertilizer such as particle strength, surface dust amount, smoothness, roundness and the like are different, so that the adhesion force of the anti-caking agent on the surface of the fertilizer and the coating effect are different, and through the rapid evaluation of the surface adhesion force of the anti-caking agent coated on different fertilizers, a proper anti-caking agent can be selected better according to the detection data in a targeted manner, so that the adhesion force of the anti-caking agent on the fertilizer and the coating effect reach an ideal state, the anti-caking function of the fertilizer is improved, and the problem of non-caking of the fertilizer is solved. Through parallel experiment comparison, the method disclosed by the invention has the advantages that the parallel determination deviation is within 0.05%, the data repeatability is good, the reference is strong, and the detection accuracy is high. In order to better judge the adhesion of the anti-caking agent on the surface of the fertilizer and improve the anti-caking performance of the fertilizer, an evaluation method for quickly, quantifiably and quickly measuring the adhesion of the anti-caking agent is needed to be found, so that the fertilizer is ensured to be in a loose state for a long time, is not caked and is convenient to transport and use.
The main technical problems to be solved by the invention are realized by the following scheme:
a method for rapidly measuring the adhesion of an anti-caking agent on the surface of a granular fertilizer is characterized by comprising the following steps:
(1) uniformly coating the powdery anti-caking agent to be detected on the granulated fertilizer, wherein the coating amount is 1.0-10.0 kg/t;
(2) weighing 20.00-100.00 g of two parts of coated powdery anti-caking agent fertilizer in m weight1And m2In units of g;
(3) the weight is m1And m2Respectively placing the fertilizers in a wheel drum of a friability tester, setting the rotating speed and the rotating time of the wheel drum, respectively taking out the fertilizers after the rotation is finished, sieving the fertilizers by using a sieve with the particle size of 1.00mm, weighing the weight of the fertilizers on the sieve, and recording the weight as m1' and m2′；
(4) Calculating the mass fraction ratio of the adhesive force of the powdery anti-caking agent as w by using the following formula:
w1＝m1′/m1×100％
w2＝m2′/m2×100％
w＝(w1+w2)/2
in the formula: w-average mass fraction ratio of adhesive force of powdery anti-caking agent
w1Mass fraction ratio of powdery anti-caking agent adhesion force of sample 1
w2Mass fraction ratio of powdery anti-caking agent adhesion force of sample 2
m1、m2Quality of coated powdery anti-caking agent for sample 1 and sample 2 before friability tester
m1′、m2' -are respectively a specimen1 and 2 coating powder anti-caking friability tester back sieve mass
(5) Evaluation criteria of adhesion force: when w is more than 95 percent, the powdery anti-caking agent has better adhesive force; when w is more than or equal to 90% and less than or equal to 95%, the adhesive force of the powdery anti-caking agent is general; when w is less than 90%, the adhesive force of the powdery anti-caking agent is poor;
the larger the w (%) value is, the better the adhesive force of the powdery anti-caking agent is, and the anti-caking effect is correspondingly better; on the contrary, the smaller the numerical value is, the poorer the adhesion of the powdery anti-caking agent is, and the anti-caking effect is also worsened.
A method for rapidly measuring the adhesion of an anti-caking agent on the surface of a granular fertilizer is characterized by comprising the following steps:
(1) uniformly coating the oily anti-caking agent to be detected on the granulated fertilizer, wherein the coating amount is 0.1-5.0 kg/t;
(2) weighing 20.00-100.00 g of two parts of coated oily anti-caking agent fertilizer in m weight3And m4In units of g;
(3) the weight is m3And m4Respectively placing the fertilizers in a wheel drum of a friability tester, setting the rotating speed and the rotating time of the wheel drum, respectively taking out the fertilizers after the rotation is finished, sieving the fertilizers by using a sieve with the particle size of 1.00mm, weighing the weight of the fertilizers on the sieve, and recording the weight as m3' and m4′；
(4) Calculating the mass fraction ratio of the surface adhesion force of the oily anti-caking agent as w' by using the following formula:
W3＝m3′/m3×100％
W4＝m4′/m4×100％
w′＝(w3+w4)/2
in the formula: average mass fraction ratio of surface adhesion of w' -oily anti-caking agent
W3Mass fraction ratio of surface adhesion of oily anti-caking agent of sample 3
W4Mass fraction ratio of surface adhesion of oily anti-caking agent of sample 4
m3、m4Coating oily anti-caking agent for sample 3 and sample 4 respectivelyQuality before friability tester
m3′、m4' -amount of material on sieve behind coated oily anti-caking friability tester for sample 3 and sample 4 respectively
(5) Evaluation criteria for surface adhesion: when w' is more than 99%, the surface adhesive force of the oily anti-caking agent is better; when the w' is more than or equal to 98 percent and less than or equal to 99 percent, the surface adhesive force of the oily anti-caking agent is general; when w' is less than 98 percent, the surface adhesion of the oily anti-caking agent is poor;
the larger the w' (%) value is, the better the surface adhesive force of the oily anti-caking agent is, the coating uniformity is strong, and the anti-caking effect is correspondingly better; conversely, the smaller the numerical value, the poorer the surface adhesion of the oily anti-caking agent, the weaker the coating and spreading uniformity and the poorer the anti-caking effect.
In the step (1), the particle size of the coated granular fertilizer is 2.00-4.00 mm.
In the step (3), the friability tester is used as a double disc or a single disc, the rotating speed of the wheel drum is set to be 10-90 n/min, and the rotating time is set to be 0.5-3 h.
The granular fertilizer is urea, calcium superphosphate, triple superphosphate, monoammonium phosphate, diammonium phosphate, potash fertilizer, compound fertilizer or medium and trace nutrient element fertilizer.
The method has the advantages of simple flow, convenient operation, strong detection data foundation and high reference value, and can truly reflect the adhesive capacity of the anticaking agent on the fertilizer. By measuring the mass fraction ratio of the adhesion force of the anti-caking agent on the surface of the granulated fertilizer, the coating and spreading uniformity and the anti-caking application effect of the anti-caking agent are judged in advance, and the anti-caking agent is used as a reference for designing the formula of the anti-caking agent, and is used for screening the optimal applicable type of the anti-caking agent and guiding the addition amount of the anti-caking agent, so that the anti-caking effect of the fertilizer is improved, and the environmental pollution caused.
Detailed Description
The invention will be further described with reference to specific examples:
example 1:
the method for rapidly measuring the adhesion of the powdery anti-caking agent on the surface of the granulated fertilizer comprises the following steps of:
(1) uniformly coating the powdery anti-caking agent to be detected on a rotary drum compound fertilizer with the particle size of 2.00-4.00 mm, wherein the coating amount is 10.0kg/t fertilizer;
(2) 52.31g (m) of two parts of coating powdery anti-caking agent compound fertilizer are weighed1) And 52.00g (m)2) Respectively placing the tablets in a left wheel drum and a right wheel drum of a CJY-300B tablet friability tester;
(3) setting the rotation speed of a wheel drum of the friability tester to be 10n/min and the uniform rotation time to be 1.5h, respectively taking out after the rotation is finished, sieving by using a sieve with the particle size of 1.00mm, weighing the weight of the fertilizer on the sieve, and recording the weight to be 48.12g (m) respectively1') and 47.84g (m)2′)；
(4) According to the formula, the adhesive force of the powdery anti-caking agent on the surface of the rotary drum compound fertilizer is 92.00 percent (w), which indicates that the adhesive force of the powdery anti-caking agent on the surface of the rotary drum compound fertilizer is general.
A first attached table:
example 2:
the method for rapidly measuring the adhesion of the powdery anti-caking agent on the surface of the granulated fertilizer comprises the following steps of:
(1) uniformly coating a powdery anti-caking agent to be detected on diammonium phosphate with the particle size of 2.00-4.00 mm, wherein the coating amount is 1.0kg/t fertilizer;
(2) weighing 61.50g (m) of two parts of coated powdery anticaking agents diammonium phosphate1) And 61.70g (m)2) Respectively placing the tablets in a left wheel drum and a right wheel drum of a CJY-300B tablet friability tester;
(3) setting the rotation speed of a wheel drum of the friability tester to be 90n/min and the uniform rotation time to be 0.5h, respectively taking out after the rotation is finished, sieving by using a sieve with the particle size of 1.00mm, weighing the weight of the fertilizer on the sieve, and recording the weight to be 59.58g (m) respectively1') and 59.76g (m)2′)；
(4) The adhesion force of the powdery anti-caking agent on the diammonium phosphate is 96.87 percent (w) according to the formula calculation, which shows that the adhesion force of the powdery anti-caking agent on the surface of the diammonium phosphate is better.
And B, attaching a table II:
example 3:
the method for rapidly measuring the adhesion of the powdery anti-caking agent on the surface of the granulated fertilizer comprises the following steps of:
(1) uniformly coating a powdery anti-caking agent to be detected on a high tower compound fertilizer with the particle size of 2.00-4.00 mm, wherein the coating amount is 5.0kg/t fertilizer;
(2) weighing two parts of coating powdery anti-caking agent compound fertilizer 40.60g (m)1) And 40.50g (m)2) Respectively placing the tablets in a wheel drum of a CS-4 tablet friability tester;
(3) setting the rotation speed of a wheel drum of the friability tester to be 25n/min and the uniform rotation time to be 3h, respectively taking out after the rotation is finished, sieving by using a sieve with the particle size of 1.00mm, weighing the weight of the fertilizer on the sieve, and recording the weight to be 38.22g (m) respectively1') and 38.13g (m)2′)；
(4) According to the formula, the adhesive force of the powdery anti-caking agent on the high tower compound fertilizer is 94.14 percent (w), which indicates that the adhesive force of the powdery anti-caking agent on the surface of the high tower compound fertilizer is general.
Attaching a third table:
example 4:
the method for rapidly measuring the adhesion of the powdery anti-caking agent on the surface of the granulated fertilizer comprises the following steps of:
(1) uniformly coating a powdery anti-caking agent to be detected on potassium sulfate with the particle size of 2.00-4.00 mm, wherein the coating amount is 6.0kg/t fertilizer;
(2) 28.18g (m) of potassium sulfate as powdery anti-caking agent with two parts of coating film is weighed1) And 28.15g (m)2) Respectively placing the tablets in a left wheel drum and a right wheel drum of a CJY-300B tablet friability tester;
(3)setting the rotation speed of a wheel drum of the friability tester to be 80n/min and the uniform rotation time to be 1h, respectively taking out after the rotation is finished, sieving by using a sieve with the particle size of 1.00mm, weighing the weight of the fertilizer on the sieve, and recording the weight to be 25.07g (m) respectively1') and 25.05g (m)2′)；
(4) According to the formula, the adhesion force of the powdery anti-caking agent on the surface of the potassium sulfate is 88.98% (w), which indicates that the adhesion force of the powdery anti-caking agent on the surface of the potassium sulfate is poor.
And (4) the attached table is four:
example 5:
the method for rapidly measuring the adhesion of the powdery anti-caking agent on the surface of the granulated fertilizer comprises the following steps of:
(1) uniformly coating the powdery anticaking agent to be detected on calcium superphosphate with the particle size of 2.00-4.00 mm, wherein the coating amount is 8.0kg/t fertilizer;
(2) 66.93g (m) of coated powdery anticaking agent calcium superphosphate is weighed1) And 66.90g (m)2) Respectively placing the tablets in a left wheel drum and a right wheel drum of a CJY-300B tablet friability tester;
(3) setting the rotation speed of a wheel drum of the friability tester to be 30n/min and the uniform rotation time to be 2 hours, respectively taking out after the rotation is finished, sieving by using a sieve with the particle size of 1.00mm, weighing the weight of the fertilizer on the sieve, and recording the weight to be 58.97g (m) respectively1') and 58.94g (m)2′)；
(4) According to the formula, the adhesion force of the powdery anti-caking agent on the surface of the calcium superphosphate is 88.10 percent (w), which indicates that the adhesion force of the powdery anti-caking agent on the surface of the calcium superphosphate is poor.
The attached table five:
example 6:
the method for rapidly measuring the adhesion of the powdery anti-caking agent on the surface of the granulated fertilizer comprises the following steps of:
(1) uniformly coating the powdery anti-caking agent to be detected on urea with the particle size of 2.00-4.00 mm, wherein the coating amount is 2.0kg/t fertilizer;
(2) weighing 35.10g (m) of two parts of coated powdery anticaking agent urea1) And 35.30g (m)2) Respectively placing the tablets in a left wheel drum and a right wheel drum of a CJY-300B tablet friability tester;
(3) setting the rotation speed of a wheel drum of the friability tester to be 40n/min and the uniform rotation time to be 2.5h, respectively taking out after the rotation is finished, sieving by using a sieve with the particle size of 1.00mm, weighing the weight of the fertilizer on the sieve, and recording the weight of 34.07g (m) respectively1') and 34.26g (m)2′)；
(4) According to the formula, the adhesive force of the powdery anti-caking agent on the surface of the urea is 97.06% (w), which indicates that the adhesive force of the powdery anti-caking agent on the surface of the urea is better.
And (5) adding a table six:
example 7:
the method for rapidly determining the adhesion of the oily anti-caking agent on the surface of the granulated fertilizer comprises the following steps:
(1) uniformly coating the oily anti-caking agent to be detected on a high tower compound fertilizer with the particle size of 2.00-4.00 mm, wherein the coating amount is 0.1kg/t fertilizer;
(2) weighing 56.20g (m) of two parts of coated oily anti-caking agent compound fertilizer3) And 56.30g (m)4) Respectively placing the tablets in a left wheel drum and a right wheel drum of a CJY-300B tablet friability tester;
(3) setting the rotation speed of a wheel drum of the friability tester to be 90n/min and the uniform rotation time to be 0.5h, respectively taking out after the rotation is finished, sieving by using a sieve with the particle size of 1.00mm, weighing the weight of the fertilizer on the sieve, and recording the weight to be 56.15g (m) respectively3') and 56.26g (m)4′)；
(4) According to the formula, the adhesion force of the oily anti-caking agent on the surface of the high-tower compound fertilizer is 99.92 percent (w'), which shows that the adhesion force of the oily anti-caking agent on the surface of the high-tower compound fertilizer is better.
A seventh attached table:
example 8:
the method for rapidly determining the adhesion of the oily anti-caking agent on the surface of the granulated fertilizer comprises the following steps:
(1) uniformly coating the oily anti-caking agent to be detected on diammonium phosphate with the particle size of 2.00-4.00 mm, wherein the coating amount is 1.0kg/t fertilizer;
(2) 80.80g (m) of two parts of coated oily anticaking agent diammonium phosphate3) And 80.70g (m)4) Respectively placing the tablets in a left wheel drum and a right wheel drum of a CJY-300B tablet friability tester;
(3) setting the rotation speed of a wheel drum of the friability tester to be 10n/min and the uniform rotation time to be 3h, respectively taking out after the rotation is finished, sieving by using a sieve with the particle size of 1.00mm, weighing the weight of the fertilizer on the sieve, and recording the weight to be 80.76g (m) respectively3') and 80.66g (m)4′)；
(4) According to the formula, the adhesion force of the oily anti-caking agent on the surface of the monoammonium phosphate is 99.95% (w'), which indicates that the adhesion force of the oily anti-caking agent on the surface of the diammonium phosphate is better.
And eight in attached table:
example 9:
the method for rapidly determining the adhesion of the oily anti-caking agent on the surface of the granulated fertilizer comprises the following steps:
(1) uniformly coating the oily anticaking agent to be detected on calcium superphosphate with the particle size of 2.00-4.00 mm, wherein the coating amount is 4.0kg/t fertilizer;
(2) weighing 20.10g (m) of two parts of coated oily anticaking agent calcium superphosphate3) And 20.30g (m)4) Respectively placing the tablets in a wheel drum of a CS-4 tablet friability tester;
(3) setting the rotation speed of a wheel drum of the friability tester to be 25n/min and the uniform rotation time to be 1.5h, respectively taking out after the rotation is finished, sieving by using a sieve with the particle size of 1.00mm, weighing the weight of the fertilizer on the sieve, and recording the weight to be 19.61g (m) respectively3') and 19.82g (m)4′)；
(4) According to the formula, the adhesion force of the oily anticaking agent on the surface of the calcium superphosphate is 97.55 percent (w'), which indicates that the adhesion force of the oily anticaking agent on the surface of the calcium superphosphate is relatively poor.
Nine parts of the attached table:
example 10:
the method for rapidly determining the adhesion of the oily anti-caking agent on the surface of the granulated fertilizer comprises the following steps:
(1) uniformly coating the oily anti-caking agent to be detected on urea with the particle size of 2.00-4.00 mm, wherein the coating amount is 0.5kg/t fertilizer;
(2) 60.21g (m) of two parts of coated oily anticaking agent urea is weighed3) And 60.30g (m)4) Respectively placing the tablets in a left wheel drum and a right wheel drum of a CJY-300B tablet friability tester;
(3) setting the rotation speed of a wheel drum of the friability tester to be 30n/min and the uniform rotation time to be 0.5h, respectively taking out after the rotation is finished, sieving by using a sieve with the particle size of 1.00mm, weighing the weight of the fertilizer on the sieve, and recording the weight to be 59.15g (m) respectively3') and 59.25g (m)4′)；
(4) The adhesion force of the oily anti-caking agent on the urea surface is 98.25 percent (w') according to the formula calculation, which shows that the adhesion force of the oily anti-caking agent on the urea surface is general.
Attached table ten:
example 11:
the method for rapidly determining the adhesion of the oily anti-caking agent on the surface of the granulated fertilizer comprises the following steps:
(1) uniformly coating the oily anti-caking agent to be detected on monoammonium phosphate with the particle size of 2.00-4.00 mm, wherein the coating amount is 5.0kg/t fertilizer;
(2) weighing two parts of coated oily anticaking agent monoammonium phosphate 40.81g (m)3) And 40.73g (m)4) Respectively placing the tablets in a left wheel drum and a right wheel drum of a CJY-300B tablet friability tester;
(3) setting the rotation speed of a wheel drum of the friability tester to be 20n/min and the uniform rotation time to be 2.5h, respectively taking out after the rotation is finished, sieving by using a sieve with the particle size of 1.00mm, weighing the weight of the fertilizer on the sieve, and recording the weight to be 40.26g (m) respectively3') and 40.19g (m)4′)；
(4) According to the formula, the adhesion force of the oily anti-caking agent on the surface of the monoammonium phosphate is 98.66% (w'), which indicates that the adhesion force of the oily anti-caking agent on the surface of the monoammonium phosphate is general.
Eleven in the attached table:
example 12:
the method for rapidly determining the adhesion of the oily anti-caking agent on the surface of the granulated fertilizer comprises the following steps:
(1) uniformly coating the oily anticaking agent to be detected on the triple superphosphate with the particle size of 2.00-4.00 mm, wherein the coating amount is 2.5kg/t fertilizer;
(2) weighing two parts of coated oily anti-caking agent, 30.15g (m) of superphosphate3) And 30.21g (m)4) Respectively placing the tablets in a left wheel drum and a right wheel drum of a CJY-300B tablet friability tester;
(3) setting the rotation speed of a wheel drum of the friability tester to be 45n/min and the uniform rotation time to be 2h, respectively taking out after the rotation is finished, and sieving by using a sieve with the particle size of 1.00mmSeparately, the weight of the fertilizer on the sieve was weighed, and the recorded weights were 29.17g (m) respectively3') and 29.23g (m)4′)；
(4) According to the calculation of the formula, the adhesion force of the oily anticaking agent on the surface of the triple superphosphate is 96.75 percent (w'), which indicates that the adhesion force of the oily anticaking agent on the surface of the triple superphosphate is poor.
The twelve attached tables:
Claims (5)
1. a method for rapidly measuring the adhesion of an anti-caking agent on the surface of a granular fertilizer is characterized by comprising the following steps:
(1) uniformly coating the powdery anti-caking agent to be detected on the granulated fertilizer, wherein the coating amount is 1.0-10.0 kg/t;
(2) weighing 20.00-100.00 g of two parts of coated powdery anti-caking agent fertilizer in m weight1And m2In units of g;
(3) the weight is m1And m2Respectively placing the fertilizers in a wheel drum of a friability tester, setting the rotating speed and the rotating time of the wheel drum, respectively taking out the fertilizers after the rotation is finished, sieving the fertilizers by using a sieve with the particle size of 1.00mm, weighing the weight of the fertilizers on the sieve, and recording the weight as m1' and m2′；
(4) Calculating the mass fraction ratio of the adhesive force of the powdery anti-caking agent as w by using the following formula:
w1＝m1′/m1×100％
w2＝m2′/m2×100％
w＝(w1+w2)/2
in the formula: w-average mass fraction ratio of adhesive force of powdery anti-caking agent
w1Mass fraction ratio of powdery anti-caking agent adhesion force of sample 1
w2Mass fraction ratio of powdery anti-caking agent adhesion force of sample 2
m1、m2Bags for sample 1 and sample 2, respectivelyQuality of film powder anti-caking agent before friability tester
m1′、m2' -amount of substance on sieve behind test sample 1 and test sample 2 coating powder anti-caking friability tester
(5) Evaluation criteria of adhesion force: when w is more than 95 percent, the powdery anti-caking agent has better adhesive force; when w is more than or equal to 90% and less than or equal to 95%, the adhesive force of the powdery anti-caking agent is general; when w is less than 90%, the adhesive force of the powdery anti-caking agent is poor;
the larger the w (%) value is, the better the adhesive force of the powdery anti-caking agent is, and the anti-caking effect is correspondingly better; on the contrary, the smaller the numerical value is, the poorer the adhesion of the powdery anti-caking agent is, and the anti-caking effect is also worsened.
2. A method for rapidly measuring the adhesion of an anti-caking agent on the surface of a granular fertilizer is characterized by comprising the following steps:
(1) uniformly coating the oily anti-caking agent to be detected on the granulated fertilizer, wherein the coating amount is 0.1-5.0 kg/t;
(2) weighing 20.00-100.00 g of two parts of coated oily anti-caking agent fertilizer in m weight3And m4In units of g;
(3) the weight is m3And m4Respectively placing the fertilizers in a wheel drum of a friability tester, setting the rotating speed and the rotating time of the wheel drum, respectively taking out the fertilizers after the rotation is finished, sieving the fertilizers by using a sieve with the particle size of 1.00mm, weighing the weight of the fertilizers on the sieve, and recording the weight as m3' and m4′；
(4) Calculating the mass fraction ratio of the surface adhesion force of the oily anti-caking agent as w' by using the following formula:
W3＝m3′/m3×100％
W4＝m4′/m4×100％
w′＝(w3+w4)/2
in the formula: average mass fraction ratio of surface adhesion of w' -oily anti-caking agent
W3Mass fraction ratio of surface adhesion of oily anti-caking agent of sample 3
W4Test onSample 4 mass fraction ratio of surface adhesion of oily anti-caking agent
m3、m4Quality of coated oily anti-caking agent of sample 3 and sample 4 before friability tester
m3′、m4' -amount of material on sieve behind coated oily anti-caking friability tester for sample 3 and sample 4 respectively
(5) Evaluation criteria for surface adhesion: when w' is more than 99%, the surface adhesive force of the oily anti-caking agent is better; when the w' is more than or equal to 98 percent and less than or equal to 99 percent, the surface adhesive force of the oily anti-caking agent is general; when w' is less than 98 percent, the surface adhesion of the oily anti-caking agent is poor;
the larger the w' (%) value is, the better the surface adhesive force of the oily anti-caking agent is, the coating uniformity is strong, and the anti-caking effect is correspondingly better; conversely, the smaller the numerical value, the poorer the surface adhesion of the oily anti-caking agent, the weaker the coating and spreading uniformity and the poorer the anti-caking effect.
3. The method for rapidly determining the adhesion of the anti-caking agent on the surface of the granulated fertilizer as claimed in claim 1 or 2, wherein: in the step (1), the particle size of the coated granular fertilizer is 2.00-4.00 mm.
4. The method for rapidly determining the adhesion of the anti-caking agent on the surface of the granulated fertilizer as claimed in claim 1 or 2, wherein: in the step (3), the friability tester is used as a double disc or a single disc, the rotating speed of the wheel drum is set to be 10-90 n/min, and the rotating time is set to be 0.5-3 h.
5. The method for rapidly determining the adhesion of the anti-caking agent on the surface of the granulated fertilizer as claimed in claim 1 or 2, wherein: the granular fertilizer is urea, calcium superphosphate, triple superphosphate, monoammonium phosphate, diammonium phosphate, potash fertilizer, compound fertilizer or medium and trace nutrient element fertilizer.
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