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Preparation method of special moisture-proof urea for blended fertilizer

A technology of blending fertilizer and urea, which is applied in application, fertilization equipment, fertilizer mixture, etc., can solve the problems of inability to fertilize, restrict the development of blended fertilizer, and not be able to contact with urea

Inactive Publication Date: 2018-01-16
HUBEI FORBON TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the acidic characteristics of ordinary calcium prevent it from contacting with urea, because the residual sulfuric acid in ordinary calcium will react with urea to form urea sulfate, which is in a liquid state, which causes farmers to use ordinary calcium as a phosphorus source and urea, potassium fertilizer to prepare When mixing fertilizers, the fertilizers become wet and form agglomerates, making it impossible to fertilize
[0006] Because of this problem, the development of blended fertilizers has also been restricted to a certain extent.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment example 1

[0021] At the front end of the urea wrap drum, on 1 ton of urea granules, spray 0.5 kg of HISOFT FA 130 produced by Hubei Fubang Technology Co., Ltd. (by weight percentage, the composition is 20% dextrin, 20% polyethylene glycol 4000 and 60% water mixture). At the rear end of the coating drum, spray 10 kg of prepared modified magnesium oxide powder to obtain the moisture-proof urea for blended fertilizers. The formula of the modified magnesia powder: magnesia raw powder, adding 5% of the total amount of magnesia raw powder with paraffin wax with a melting point of 60° C., and grinding until the mesh number of the powder is 600 mesh.

[0022] The urea treated above has a mass ratio of calcium superphosphate of 1:1, and it is completely loosened after being placed for 3 months;

[0023] The urea without the above-mentioned treatment, the mass ratio of calcium superphosphate is 1:1, put it for 5 minutes, a large amount of water will be precipitated from the fertilizer mixture, t...

Embodiment example 2

[0025] In the disc, on 1 ton of urea granules, spray 1 kg of HISOFT FA 130 produced by Hubei Fubon Technology Co., Ltd. (by weight percentage, the composition is 10% dextrin, 30% polyethylene glycol 4000 and 60% water mixture), in the disk, spray 30 kilograms of prepared modified magnesium oxide powder again, promptly obtain the special moisture-proof type urea for blending fertilizer. The formula of the modified magnesia powder: magnesia raw powder, adding soybean vegetable oil accounting for 3% of the total amount of magnesia raw powder, and grinding until the mesh size of the powder is 500 mesh.

[0026] The urea treated above has a mass ratio of calcium superphosphate of 1:1, and it is completely loosened after being placed for 4 months;

[0027] The urea without the above-mentioned treatment, the mass ratio of calcium superphosphate is 1:1, put it for 5 minutes, a large amount of water will be precipitated from the fertilizer mixture, the material will become wet and stic...

Embodiment example 3

[0029] In the disc, on 1 ton of urea granules, spray 1 kg of HISOFT FA 130 produced by Hubei Fubon Technology Co., Ltd. (by weight percentage, the composition is 30% dextrin, 5% polyethylene glycol 4000 and 65% water mixture), in the disk, spray 30 kilograms of prepared modified magnesium oxide powder again, promptly obtain the special moisture-proof type urea for blending fertilizer. Described modified magnesia powder formula: magnesia former powder, add the mixing agent that accounts for 3% of magnesia former powder total amount, melting point is the paraffin of 70 ℃: soybean vegetable oil: mineral oil (the carbon chain is in C16-C35 Mineral oil) prepared in a ratio of 1:1:1, ground and modified until the powder has a mesh size of 200 mesh.

[0030] The urea treated above has a mass ratio of calcium superphosphate of 1:1, and it is completely loosened after being placed for 3 months;

[0031] The urea without the above-mentioned treatment, the mass ratio of calcium superpho...

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PUM

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Abstract

The invention relates to a preparation method of special moisture-proof urea for a blended fertilizer. The preparation method comprises the following steps: adding granular urea into a coating drum front end, a disc or a mixer having a mixing function, and spraying a layer of a special moisture-proof agent on the surface of the granular urea; and spraying a layer of modified magnesium oxide powderin a coating drum rear end, the disc or the mixer having a mixing function in order to prepare the special moisture-proof urea for the blended fertilizer. The urea prepared through the method can bestably mixed with calcium superphosphate and other acidic fertilizers, and does not absorb moisture, become moist or cake.

Description

technical field [0001] The invention relates to the field of blended fertilizer manufacture. It is mainly a preparation method of moisture-proof urea specially used for blending fertilizers. Background technique [0002] China is a large agricultural country, and various fertilizers, especially chemical fertilizers, have made an indelible contribution to my country's food security. [0003] The demand for food drives the explosive growth of China's chemical fertilizers. In the past ten years, there have been more than 6,000 chemical fertilizer companies in China, most of which are compound fertilizer companies. They crush granular urea, ammonium phosphate, potassium chloride or potassium sulfate Then use steam drum granulation again, or high tower granulation after melting, the contribution to fertilizer nutrients is zero. The United States, which is completely different from our Chinese fertilizer model, mainly uses blended fertilizers. Blended fertilizers are made by phy...

Claims

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Application Information

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IPC IPC(8): C05G3/00C05G3/90
CPCC05D9/00C05G3/00C05G3/90
Inventor 王仁宗操素芬刘裕
Owner HUBEI FORBON TECH