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Multi-element urea-based composite fertilizer and production method thereof

A technology of urea-based compound fertilizer and production method, which is applied in the field of multi-element urea-based compound fertilizer and production, which can solve the problems of poor product appearance, agglomeration, and low particle strength, and achieve round appearance, large surface area, and low drying energy consumption Effect

Inactive Publication Date: 2015-01-21
SINO AGRI SHUNTIAN ECOLOGICAL FERTILIZER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the compound fertilizer produced by granulation method in production uses high-temperature molten urine, which is easy to produce new biuret, and the content of biuret is generally high, exceeding the national standard. Therefore, strictly control the high-tower compound fertilizer. The content of biuret is an important subject to improve the quality of compound fertilizer
[0004] At the same time, the appearance of the product is poor, the particle strength is low, and serious caking is also a problem that needs to be solved

Method used

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  • Multi-element urea-based composite fertilizer and production method thereof
  • Multi-element urea-based composite fertilizer and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] (1) Preparation of urea sulfate: 150 kg of urea (containing N46%), 73 kg of concentrated sulfuric acid (98%), and 7 kg of water were added to the preparation tank with agitator at the same time. During the addition, pay close attention to the preparation Changes in the tank temperature, the reaction temperature is controlled at 60-80°C by cooling the circulating water, and after about 40 minutes, the reaction is completed and a clear urea sulfate solution is generated.

[0064] (2) Spraying: the urea sulfate solution prepared above is uniformly mixed with 60.5 kg of concentrated sulfuric acid (98%) in a mixer and then sprayed into the granulator through a nozzle.

[0065] (3) Granulation: There are 160 kg of powdered diammonium phosphate, 160 kg of calcium magnesium phosphate fertilizer, 210 kg of potassium chloride, 31 kg of bentonite, and 31 kg of pine needle powder in the granulator. 43 kg of liquid ammonia is sprayed into the pellet machine. After 5 minutes of gran...

Embodiment 2

[0069] (1) Preparation of urea sulfate: 320 kg of urea (containing N46%), 150 kg of concentrated sulfuric acid (98%), and 15 kg of water were added to the preparation tank with agitator at the same time. During the addition, pay close attention to the preparation Changes in the tank temperature, the reaction temperature is controlled at 60-80°C by cooling circulating water, and after about 30 minutes, the reaction is completed and a clear urea sulfate solution is generated.

[0070] (2) Spraying: the urea sulfate solution prepared above is sprayed into the granulator through the nozzle after uniformly mixing with 121 kilograms of concentrated sulfuric acid (98%) in a mixer.

[0071] (3) Granulation: There are 325 kg of powdered diammonium phosphate, 325 kg of calcium magnesium phosphate fertilizer, 430 kg of potassium chloride, 65 kg of bentonite, and 65 kg of pine needle powder in the granulator. 89 kg of liquid ammonia is sprayed into the granulator. After 8 minutes of gran...

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Abstract

The invention discloses a multi-element urea-based composite fertilizer and a production method thereof. The urea-based composite fertilizer comprises sulfuric acid urea, thick sulfuric acid, diammonium phosphate, calcium magnesium phosphate, potassium chloride, bentonite and pine needle meal. The pine needle meal can not only be used as the basic fertilizer to provide nutrients to crops, but also can increase the viscosity of materials due to a great amount of oily substances and the microcellular structure and the large surface area of powder; the density and the strength of the multi-element urea-based composite fertilizer are improved; and meanwhile, further reaction and possibility that the crystal form is converted in the storage process of the materials are reduced, the multi-element urea-based composite fertilizer is stable in property, and pulverization and caking are unlikely to happen.

Description

technical field [0001] The invention relates to a compound fertilizer and a production method, in particular to a multi-element urea-based compound fertilizer and a production method. Background technique [0002] In terms of fertilizer manufacturing methods, the compound fertilizer whose nitrogen source is urea is called urea-based compound fertilizer. Urine-based compound fertilizer is a neutral fertilizer with strong adaptability to soil and crops, convenient application, and can save a lot of fertilizer packaging, transportation, storage and fertilization costs. Especially in recent years, with the development of agricultural production and the country's policy of promoting soil testing and formula fertilization, farmers have shifted from using simple fertilizers to more compound fertilizers, which also provides more opportunities for various compound fertilizers such as urea-based compound fertilizers. For the broad market development space. [0003] Urea-based compou...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C05G3/00
Inventor 岳万华张彩年佟岩
Owner SINO AGRI SHUNTIAN ECOLOGICAL FERTILIZER CO LTD
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