Humic acid urea and method for producing the same

A humic acid urea, humic acid technology, applied in urea compound fertilizer, organic fertilizer, nitrogen fertilizer and other directions, can solve the problems of not very obvious application effect, difficult mass production, promotion, unsightly appearance of products, etc., and achieve smooth and beautiful appearance. , full function, low production cost effect

Inactive Publication Date: 2009-05-13
王矛
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The common feature of the above two kinds of humic acid urea products is that they use humic acid to wrap urea particles, so they both have the disadvantages of unsightly appearance and the outer layer of humic acid is easy to fall off. After using the above products, farmers’ hands become black and sticky. A lot of coal powder, very inconvenient to use
Secondly, because t

Method used

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  • Humic acid urea and method for producing the same
  • Humic acid urea and method for producing the same
  • Humic acid urea and method for producing the same

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0022] Example 1

[0023] Put the peat containing humic acid into the disc granulator, add a small amount of water and rotate to granulate to make 1~3mm spherical granules, and put them into the drum after drying. Put urea into the melter, pass in high-temperature water vapor, and melt into liquid at 130-140℃, control the outflow of molten urea liquid through a flow meter, and spray out the molten urea liquid at a pressure of 0.5Mpa for atomization , Sprayed on the surface of the rotating humic acid particles. As the temperature decreases, the molten urea solution gradually solidifies on the humic acid particles, and the particles gradually become larger by rotation. After cooling, it is sieved into two kinds of granules with a diameter of 1mm≤d≤2.5mm and 2.5mm≤d≤5mm, and packaged into products. It is determined that the product contains 25% nitrogen and 5% humic acid.

Example Embodiment

[0024] Example 2

[0025] The weathered coal is ground into powdered humic acid, which is treated with NaOH to form ammonium humate. Put it into a rotating drum granulator, add a small amount of water to spin granulation, dry it into spherical granules with a particle diameter of 1 to 3 mm, and put them into the drum. Put urea into the melter, add 3% of the weight of urea, add high-temperature steam, and melt into liquid at 130~145℃, then add powdered ammonium sulfate that accounts for 20% of the weight of urea, and wait for it to melt. , The flow rate of the molten urea mixture is controlled by a flowmeter. The mixture is atomized by a sprayer at a pressure of 0.5Mpa by a pressure pump and sprayed on the surface of the rotating humic acid particles. As the temperature decreases, the molten urea mixture gradually solidifies on the humic acid particles, and the particles gradually become larger through rotation to form humic acid urea particles. After the humic acid urea granules a...

Example Embodiment

[0026] Example 3

[0027] Put the low-grade coal containing humic acid into a rotary drum granulator, add a small amount of water to rotate and granulate to make 1~3mm spherical particles, which are dried and put into the drum. Put urea into the melter, add 2% of the weight of urea, add high-temperature steam, and melt into a liquid state at 130-140°C, then add 10% of urea weight, ammonium nitrate, after all melted, pass The flow meter controls the outflow of the molten urea mixture. The mixture is atomized by a sprayer at a pressure of 0.5Mpa by a pressure pump, and then sprayed on the surface of the rotating humic acid particles. As the temperature decreases, the molten urea mixture gradually solidifies on the humic acid particles, and the particles gradually become larger through rotation to form humic acid urea particles. After cooling, they are sieved to obtain two kinds of granules with a diameter of 1mm≤d≤2.5mm and 2.5mm≤d≤5mm, which are packaged into products respectively....

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Abstract

The invention provides humic acid urea. At a temperature of between 70 and 150 DEG C, the urea is heated and melted to be liquid state, sprayed on the surface of humic acid particles rotating in a rotating drum at a pressure of between 0.4 and 0.6MPa, and cooled down to be prepared into the urea-coated humic acid type humic acid urea. The outer part of the humic acid urea is hard shell formed by the urea or the mixture mainly comprising the urea, and the nutritive substance which is humic acid is coated in the middle part of the humic acid urea, so that the humic acid urea has crystal-clear and pure white particle as well as smooth and beautiful appearance; moreover, no powder is existed in the humic acid urea, the nutritive substance does not fall off because the nutritive substance is embedded in the humic acid urea, and the appearance of the humic acid urea is beautiful.

Description

technical field [0001] The invention relates to a fertilizer, in particular to a packaged slow-release fertilizer, and also relates to a preparation method of the packaged slow-release fertilizer. Background technique [0002] Urea is the nitrogen fertilizer with the highest nitrogen content, the largest agricultural demand, and the widest application range. However, due to the action of soil urease and nitrifying bacteria, when urea is directly used alone, the decomposition and loss of urea are too fast, and the absorption and utilization of urea nitrogen by crops is very low, and the utilization rate is only about 35%, which not only causes economic losses, but also decomposes urea. The nitrates, nitrites, and nitrogen oxides formed by the conversion will also cause serious environmental pollution. [0003] In order to solve this problem, agricultural chemists from all over the world have conducted a lot of research and developed various slow-release fertilizer manufactur...

Claims

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Application Information

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IPC IPC(8): C05G1/00C05F11/02C05C9/00
Inventor 王矛李毅
Owner 王矛
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