High-nitrogen slow released agglomeration resistant compound fertilizer and producing method thereof

Abstract

The invention relates to a fertilizer and production method thereof, more particularly a high-nitrogen slow-release anti-blocking complex fertilizer and production method thereof. The high-nitrogen slow-release anti-blocking complex fertilizer comprises a granular fertilizer core and a coating wrapped outside of the fertilizer core, the fertilizer core is ternary complex fertilizer granules, the coating is a mixed liquor at least comprises melting urea and complex anti-blocking agent or complex nitrogen slow-releasing agent. In producing process, the ternary complex fertilizer is granulated and sorted, the temperature is controlled at 35-50 DEG C, meanwhile mixing slow-releasing agent such as quinhydrone, dicyandiamine and urea by a certain proportion and heating to melt as urea-complex anti-blocking agent, then feeding the complex slow-releasing agent-urea mixed liquor and the urea-complex anti-blocking agent mixed liquor to an ejector, coating on external surface of the ternary complex fertilizer granules. The fertilizer of the invention has advantages of releasing effective nutrient uniformly and slowly, anti-blocking, is helpful for environmental protection.

Description

technical field [0001] The invention relates to a chemical fertilizer and a production method thereof, in particular to a high-nitrogen slow-release anti-caking compound fertilizer and a production method thereof. technical background [0002] With the continuous development of agricultural production, traditional agriculture with high energy consumption, high pollution and low output will be replaced by ecological agriculture with high output, low consumption, high quality, high efficiency and sustainable development. To achieve this goal, we must first solve the current situation of low nutrient utilization of chemical fertilizers, poor degree of mechanized fertilization, and repeated irregular fertilization. To solve this problem, in addition to formulating balanced fertilization and improving the scientific level of fertilization, as far as the fertilizer itself is concerned, it is necessary to improve the fertilizer dosage form, develop a wide range of applications, hig...

AI Technical Summary

Problems solved by technology

Above-mentioned first kind of method is quite different from the present invention

The coating materials used in the second method can be divided into two categories: polymer and sulfur coating, and inert material coating. Due to the poor solubility of polymer and sulfur coating, the coating layer does not contain water-soluble materials, resulting in fertilizer seepage. Poor yield, the release rate of nutrients is inconsistent with the law of fertilizer requirements of crops, and sometimes causes secondary pollution to the environment. The carriers coated with inert materials are mostly machinery oil and other substances. If used improperly, it is easy to cause secondary pollution to the environment. Pollution

[0003] In addition, fertilizer agglomeration, especially the agglomeration problem of ternary compound fertilizers, has seriously restricted the development of the compound fertilizer industry