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Method for rapidly preparing novel urea containing medium-trace elements

A medium and trace element, urea technology, applied in urea compound fertilizer, application, nitrogen fertilizer and other directions, can solve the problems of only 30% utilization rate, failure of medium and trace elements, and poor granulation of urea granules, so as to avoid the effect of solubility.

Inactive Publication Date: 2016-10-26
HUBEI FORBON TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Urea is a high-content nitrogen fertilizer, but its utilization rate is only about 30%. It is urgent to cooperate with other medium and trace elements to improve the nutritional effect of urea
[0006] The method of adding medium and trace elements is generally directly mixed with fertilizer particles and added to the inside of fertilizer particles. For urea, there is no obvious chemical reaction, which leads to the precipitation of medium and trace elements and a large amount of failure
However, the pH value of urea is weakly alkaline, and the suitable pH for medium and trace elements, especially metal salts, is about 4.5. Therefore, the urea system is not conducive to the function of trace elements, that is, the urea containing medium and trace elements is prepared to contain medium and trace elements. This method is not advisable
In addition, after adding medium and trace elements to urea, for example, after adding zinc sulfate, the granulation of urea particles becomes worse, the pores of fertilizer become larger, and the fertilizer agglomerates seriously

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment example 1

[0030] Drum urea + 0.5% zinc sulfate + 0.5% zinc oxide + 0.5% magnesium oxide

[0031] Nutritional powder formula: 32% zinc sulfate + 32% zinc oxide + 32% magnesium oxide + 4% stearic acid for grinding and modification until the powder mesh number is 600 mesh.

[0032] 1) On the front end of the coating drum, spray 1.5 kg of coating material preheated at 60 °C on 1 ton of urea particles at a temperature of 60 °C. The coating material formula is 40% rosin + 30% wax oil + 30% fatty acid mixture .

[0033] 2) Spray 15.6 kg of the above-prepared nutritional powder rich in medium and trace elements on the back end of the coating drum to obtain novel urea rich in medium and trace elements.

Embodiment example 2

[0035] High tower urea + 0.5% copper sulfate + 0.5% zinc oxide + 0.5% magnesium oxide

[0036] Nutritional powder formula: 32% copper sulfate + 32% zinc oxide + 32% magnesium oxide + 2% stearic acid + 2% paraffin for grinding and modification until the powder mesh is 600 mesh.

[0037] 1) On the front end of the coating drum, on 1 ton of urea granules at a temperature of 50° C., spray 1.5 kg of coating material preheated at 50° C., and the formula is 40% rosin+30% wax oil+30% fatty acid mixture.

[0038] 2) Spray 15.6 kg of the above-prepared nutritional powder rich in medium and trace elements on the back end of the coating drum to obtain novel urea rich in medium and trace elements.

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Abstract

The invention relates to a method for rapidly preparing novel urea containing medium-trace elements. The method is characterized by comprising the following steps that 1, a layer of coating material preheated to reach 40-70 DEG C is sprayed on urea with the temperature of 30-80 DEG C at the front end of a coated roller, wherein the coating material is a mixture of 40% rosin, 30% wax oil and 30% fatty acid; 2, a layer of nutritional powder containing medium-trace elements on the urea at the tail end of the coated roller to prepare the urea containing medium-trace elements. The medium-trace elements contained in the novel urea prepared by means of the method can be rapidly absorbed by crops. The novel urea prepared by means of the method does not easily cake and has the advantages of being simple, rapid, free of material returning, flexible and efficient and having an anti-caking function.

Description

technical field [0001] The invention relates to a method for quickly preparing novel urea containing medium and trace elements, and belongs to the technical field of 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] In the past 20 years, China's grain has increased year by year, but the quality of agricultural products has declined year by year, and the growth rate of total grain output has dropped significantly in the past 5 years. The reason is that my country's agricultural experts, fertilizer experts, planting experts, and soil experts agree that the cause The reason for the slow increase in the output of agricultural products and the decline in grain quality is that the soil nutrients are out of balance. The current agriculture is overly dependent on the macronutrients nitrogen, phosphorus, and potassium, wh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/08C05G3/00C05G3/90
CPCC05C9/00C05G3/90C05G5/38C05D5/00C05D9/02C05G3/00
Inventor 操素芬王仁宗刘裕
Owner HUBEI FORBON TECH