A method for quickly and conveniently determining the consolidation of granular fertilizers

Abstract

The application discloses a kind of fast and convenient method for determining granular fertilizer consolidation, comprising the following steps: weighing granular fertilizer W0 gram, is placed in centrifugal tube and tight cover;Full of fertilizer centrifugal tube is placed in centrifuge, sets speed and rotation time, start, until rotation time ends and shuts down;Open centrifuge outer cover, remove centrifugal tube, and pour fertilizer from centrifugal tube along the wall into test sieve, sieve 30-60 seconds, weigh the fertilizer quality W1 of sieve upper material;Fertilizer consolidation rate W=(W1 / W0)*100%.The method is simple in operation, short in time consumption, fully simulates the state of fertilizer in a sealed environment to promote rapid caking of fertilizer, has strong simulation reference, and the detection data has practicality, low detection cost, by rapidly determining fertilizer consolidation rate, the loose condition of fertilizer when storing in a sealed environment is truly reflected, the degree of caking of fertilizer itself in the process of fertilizer production can be better understood, and the anti-caking performance of the anti-caking agent is also better understood, and the normal use and addition of the anti-caking agent are guided, to ensure the external product quality of fertilizer.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of fast and convenient method for determining the solidification of granular fertilizer, belongs to the technical field of fertilizer production detection method. BACKGROUND

[0002] Fertilizer production enterprises, not only need to ensure the intrinsic quality of fertilizer, such as nutrients, moisture, particle strength and other indicators are qualified, but also need to ensure that the fertilizer has good bulk density during storage, transportation and use, in the fierce market competition in fertilizer industry, only to ensure product quality, seize market opportunities, can sell smoothly, at the same time, it can also reduce the sowing difficulty caused by product caking problem and economic loss caused by quality claim.

[0003] Once the patent CN205246510U "device for evaluating the effect of anti-caking agent" mentioned in the paper, put the fertilizer into the cylindrical barrel, the surface of the barrel is provided with a plurality of air holes, the surface of the gland is put into the set weight, then take out after standing in constant temperature and humidity for a period of time, evaluate the anti-caking effect of anti-caking agent by measuring its crushing pressure. The characteristics of this patent are that the fertilizer is placed in the barrel, and the fertilizer in the barrel is easy to absorb moisture under constant temperature and humidity conditions because the barrel surface is provided with a plurality of air holes, which has air permeability. The sealing environment after the finished fertilizer is packaged is not completely simulated; in addition, the fertilizer is in a static state in constant temperature and humidity, and it usually needs to be placed for more than 24 hours before caking occurs, the experiment time is relatively long, and this static state does not well simulate the dynamic form of fertilizer during transportation, so the practical reference value is not strong. SUMMARY

[0004] The purpose of the present application is to better simulate the sealing environment after the fertilizer is packaged, and to provide a kind of fast and convenient method for determining the solidification of granular fertilizer. The granular fertilizer is placed in the centrifuge tube of centrifuge, and the cover is tightened to seal the fertilizer. At the same time, the fertilizer is rotated at high speed in the centrifuge tube, which simulates the dynamic environment of the fertilizer during transportation and handling. The transverse centrifugal torque of the centrifuge is used to accelerate the caking speed of the fertilizer and shorten the experimental time, so as to achieve the purpose of rapid caking. In addition, after the fertilizer is caked, the caking rate is calculated by sieving and weighing the caking ratio through the test sieve, which is a common method for calculating the caking rate of fertilizer production enterprises after caking. This method has strong practicability and high reference value in practical application.

[0005] The method has simple operation, short time consumption and low detection cost, the detection method can fully simulate the state of promoting the fertilizer to rapidly agglomerate under a sealed environment, has strong simulation reference, and detection data has practicality, through rapid detection of the agglomeration rate of the fertilizer, the loose condition of the fertilizer during storage in a sealed environment can be truly reflected, the agglomeration degree of the fertilizer in the production process and the anti-agglomeration performance of the anti-agglomeration agent can be better understood, and the normal use and addition of the anti-agglomeration agent are guided, and the external product quality of the fertilizer is ensured.

[0006] For some solid fertilizers, such as monoammonium phosphate, diammonium phosphate, heavy superphosphate, superphosphate, granular urea, potassium fertilizer, compound (mixed) fertilizer or trace element fertilizer and the like, due to different production processes, process control and raw materials used, the agglomeration tendency of the fertilizers is also different, once the fertilizers are agglomerated, great influence and economic loss are brought to subsequent storage, transportation, fertilization and market sales, and it is very important to rapidly and conveniently evaluate the agglomeration of the fertilizer in the production process and the anti-agglomeration effect of the anti-agglomeration agent.

[0007] The main technical problem to be solved by the present application is realized through the following scheme:

[0008] A kind of method for rapidly and conveniently determining the agglomeration of granular fertilizer, characterized by comprising the following steps:

[0009] Step one: weigh granular fertilizer W0, W0 is 100±0.2 g, and place it in a 100 ml centrifuge tube, then tighten the lid;

[0010] Step two: place the centrifuge tube filled with fertilizer in a centrifuge, set the rotation speed and rotation time of the centrifuge, start the centrifuge according to the operation process of the centrifuge, and the centrifuge starts to work until the rotation time ends, then turn off the centrifuge;

[0011] Step three: open the outer cover of the centrifuge, take out the centrifuge tube, pour the fertilizer from the centrifuge tube along the wall into the test sieve, sieve for 30-60 seconds, and weigh the fertilizer on the sieve W1;

[0012] Step four: calculate the agglomeration rate of the fertilizer W=(W1 / W0)*100%.

[0013] In step two, the rotation speed of the centrifuge is 2000-6000 rpm, and the rotation time is 30-90 min.

[0014] In step three, the particle size of the test sieve is 4.00 mm.

[0015] The evaluation standard of the fertilizer solidification rate in the step four is that when w(%)≤10%, the fertilizer caking is slight; when 10%<w(%)<50%, the fertilizer caking is moderate; and when w(%)≥50%, the fertilizer caking is obvious.

[0016] The smaller the value of w(%), the lighter the fertilizer caking; on the contrary, the larger the value, the more serious the fertilizer caking.

[0017] In the step one, the granular fertilizer is monoammonium phosphate, diammonium phosphate, heavy superphosphate, superphosphate, granular urea, potassium fertilizer or compound fertilizer or microelement fertilizer, and the particle size is 1.00-4.00mm.

[0018] In the step one, the granular fertilizer is blank fertilizer package without anti-caking agent or fertilizer with anti-caking agent.

[0019] The method has the advantages of simple operation, short time consumption and low detection cost, the detection method can fully simulate the state of promoting the rapid caking of the fertilizer in a sealed environment, the simulation reference is strong, the detection data has practicality, the rapid detection of the fertilizer solidification rate can truly reflect the loose condition of the fertilizer in the sealed environment, the caking degree of the fertilizer in the production process and the anti-caking performance of the anti-caking agent can be better understood, and the normal use and addition of the anti-caking agent can be guided, so that the external product quality of the fertilizer is ensured. DETAILED DESCRIPTION

[0020] The application will be further described below in combination with specific examples:

[0021] Example 1:

[0022] The method for rapidly and conveniently detecting the solidification of the granular fertilizer in the embodiment is carried out according to the following steps:

[0023] (1) 100.1g and 100.2g of blank 64% diammonium phosphate W0 (without anti-caking agent) and 100.0g and 100.2g of 64% diammonium phosphate with anti-caking agent with a particle size of 1.00-4.00mm to be detected are respectively taken, and are respectively placed in four 100ml centrifuge tubes, and the lids are tightly screwed, as shown in Table 1;

[0024] (2) the rotation speed of the TGL-10C type centrifuge is set to 4000rpm, and is uniformly rotated for 60min, after the rotation is completed, is taken out, and is respectively screened for 30s using a 4.00mm sieve, the weight of the sieve residue W1 is weighed, and the weight is recorded as 55.6g, 55.7g, 9.7g and 9.8g, as shown in Table 1;

[0025] (3) According to the formula, the agglomeration rate (W%) of the blank diammonium phosphate and the diammonium phosphate coated with the anti-caking agent is shown in Table 1; it is shown that the blank diammonium phosphate itself has a moderate degree of caking, and the diammonium phosphate coated with the anti-caking agent can achieve good anti-caking effect, low agglomeration rate, and loose fertilizer.

[0026] Table 1:

[0027]

[0028] Example 2:

[0029] The method for quickly and conveniently determining the agglomeration of granular fertilizer described in this example is performed according to the following steps:

[0030] (1) 100.0 g and 100.1 g of blank heavy superphosphate W0 (without adding anti-caking agent) with a particle size of 1.00-4.00 mm to be measured were respectively placed in two 100 ml centrifuge tubes, and the lids were tightly screwed, as shown in Table 2;

[0031] (2) The speed of the TGL-10C type centrifuge was set to 6000 rpm, and it was uniformly rotated for 30 min. After the rotation was completed, it was taken out and sieved with a 4.00 mm sieve for 60 s, and the weight of the sieve residue W1 was weighed and recorded as 36.5 g and 36.6 g, respectively, as shown in Table 2;

[0032] (3) According to the formula, the agglomeration rate (W%) of the blank heavy superphosphate is shown in Table 2, which shows that the blank heavy superphosphate has a mild degree of caking, and the fertilizer itself is not easy to agglomerate.

[0033] Table 2:

[0034]

[0035] Example 3:

[0036] The method for quickly and conveniently determining the agglomeration of granular fertilizer described in this example is performed according to the following steps:

[0037] (1) 99.9 g, 99.8 g, 100.0 g and 100.2 g of coated anti-caking agent composite fertilizer (15-15-15) with a particle size of 1.00-4.00 mm to be measured were respectively placed in four 100 ml centrifuge tubes, and the lids were tightly screwed, as shown in Table 3;

[0038] (2) Set the speed of TGL-10C centrifuge to 2000 rpm, rotate at a constant speed for 90 min, after rotation, take out respectively, use a 4.00 mm sieve to sieve for 40 s respectively, weigh the sieve material W1, record the weight as 8.9 g, 8.8 g, 8.9 g and 9.0 g, as shown in Table III;

[0039] (3) According to the formula, the solidification rate (W%) of the compound fertilizer coated with anti-caking agent is calculated, as shown in Table III, which shows that after the compound fertilizer is coated with anti-caking agent, the solidification rate is low, and the anti-caking effect is good, and the fertilizer is loose.

[0040] Table III:

[0041]

[0042] Example 4:

[0043] The method for quickly and conveniently determining the solidification of granular fertilizer described in this embodiment is carried out according to the following steps:

[0044] (1) Respectively weigh the 1.00-4.00 mm particle size coated with anti-caking agent urea W0 as 99.8 g and 100.2 g, and place them in two 100 ml centrifuge tubes, and tighten the lid, as shown in Table IV;

[0045] (2) Set the speed of TGL-10C centrifuge to 3000 rpm, rotate at a constant speed for 50 min, after rotation, take out respectively, use a 4.00 mm sieve to sieve for 35 s respectively, weigh the sieve material W1, record the weight as 5.6 g and 5.8 g, as shown in Table IV;

[0046] (3) According to the formula, the solidification rate (W%) of the urea coated with anti-caking agent is calculated, as shown in Table IV, which shows that after the urea is coated with anti-caking agent, the anti-caking effect is good, the solidification rate is low, and the fertilizer is relatively loose.

[0047] Table IV:

[0048]

[0049] Example 5:

[0050] The method for quickly and conveniently determining the solidification of granular fertilizer described in this embodiment is carried out according to the following steps:

[0051] (1) Respectively weigh the 1.00-4.00 mm particle size coated with anti-caking agent urea W0 as 99.8 g and 100.2 g, and place them in two 100 ml centrifuge tubes, and tighten the lid, as shown in Table IV;

[0052] (2) Set the speed of TGL-10C centrifuge to 5000 rpm, rotate at constant speed for 30 min, after rotation, take out respectively, use a 4.00 mm sieve to sieve for 50 s, weigh the sieve material W1, the weight is 15.5 g, 15.5 g, 15.4 g and 15.6 g respectively, as shown in Table 5;

[0053] (3) According to the formula, the consolidation rate (W%) of the blank ammonium phosphate is calculated, as shown in Table 5, which shows that the blank ammonium phosphate has low consolidation rate and is not seriously caked.

[0054] Table 5:

[0055]

[0056] By detecting the consolidation rate of the granular fertilizer by the method of the application, the same kind of fertilizer is weighed, centrifugation is carried out at a set speed and time, from the experimental data, the parallel determination deviation is within 1%, the data repeatability is good, and the reference is strong. In order to better help the fertilizer enterprises to stabilize production, it is necessary to establish a rapid, convenient and quantifiable method for measuring the consolidation of granular fertilizer.

[0057] By measuring the consolidation rate of the fertilizer by a rapid and convenient method, firstly, the caking of the fertilizer itself in the production process of the fertilizer can be known in advance; secondly, the anti-caking effect of the anti-caking agent can be predicted in advance, the caking of the fertilizer is warned and effective alternative solutions are taken, which helps the production enterprises to control the external quality of the fertilizer and reduce the cost.

Claims

1. A method for rapid and convenient determination of the solidification of granular fertilizers, characterized in that The method comprises the following steps: Step one: weigh granular fertilizer W0, W0 is 100±0.2 g, and place the granular fertilizer in a 100-ml centrifuge tube, and then tightly screw the cover; Step two: place the centrifuge tube filled with the granular fertilizer in a centrifuge, set the running parameters of the centrifuge speed and rotation time, start the centrifuge according to the operation process of the centrifuge, and then work until the rotation time ends, and then stop the centrifuge; Step three: open the outer cover of the centrifuge, take out the centrifuge tube, pour the granular fertilizer from the centrifuge tube along the tube wall into a test sieve, sieve for 30-60 seconds, and then weigh the granular fertilizer on the sieve W1; Step four: calculate the granular fertilizer consolidation rate W=(W1 / W0)*100%.

2. A method for rapid and convenient determination of the consolidation of granular fertilizers as claimed in claim 1, characterized by: In the step two, the centrifuge speed is 2000-6000 rpm, and the rotation time is 30 min-90 min.

3. A method for rapid and convenient determination of the caking of granular fertilizers as claimed in claim 1, characterized by: In the step three, the particle size of the test sieve is 4.00 mm.

4. A method for rapid and convenient determination of the caking of granular fertilizers as claimed in claim 1, characterized by: In the step four, the evaluation standard of the granular fertilizer consolidation rate is that when w(%)≤10%, the granular fertilizer is slightly caked; when 10%<w(%)<50%, the granular fertilizer is moderately caked; and when w(%)≥50%, the granular fertilizer is obviously caked. The smaller the w(%) value is, the lighter the caking of the granular fertilizer is. On the contrary, the larger the value is, the more serious the caking of the granular fertilizer is.

5. A method for rapid and convenient determination of the caking of granular fertilizers as claimed in claim 1, characterized by: In the step one, the granular fertilizer is monoammonium phosphate, diammonium phosphate, heavy superphosphate, superphosphate, granular urea, potassium fertilizer, compound fertilizer or trace element fertilizer, and the particle size is 1.00-4.00 mm.

6. A method for rapid and convenient determination of the caking of granular fertilizers as claimed in claim 1, characterized by: In the step one, the granular fertilizer is blank fertilizer without anti-caking agent or fertilizer with anti-caking agent.

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