Method for coating granular fertilizer

Abstract

The invention discloses a method for coating granular fertilizer. The method for coating the granular fertilizer comprises the following steps of: (1) adding xanthan gum, potassium chloride, attapulgite and sodium polyacrylate into water, and performing stirring to obtain a suspending agent; (2) adding trace materials into the suspending agent, and performing even stirring to obtain a coating agent; and (3) coating the surface of the granular fertilizer with the coating agent and talc powder sequentially through a spraying device. Through the method for coating the granular fertilizer, the prepared suspending agent has uniformity and stability, and the quality stability of the coating agent product prepared by using the suspending agent can be improved, so that waste of materials is reduced; the purpose of precise spraying of the thick coating agent can be achieved by using a screw pump which cooperates with a special nozzle and an air compressor, and the spraying device can be protected effectively; through cooperative use of the coating agent and the spraying device, streamlined operation of fertilizer coating can be achieved, the quality stability can be ensured, and the yield can be increased greatly.

Description

technical field [0001] The invention belongs to the technical field of fertilizer coating, in particular to a method for coating granular fertilizers. Background technique [0002] With the development of the economy, families are getting richer, and people's requirements for the quality of agricultural products are getting higher and higher. However, in the past, people continued to apply a large amount of inorganic fertilizers to the soil in order to increase production, which caused serious damage to the aggregate structure of the soil. Soil salinization has become increasingly serious, which eventually not only leads to a decline in yield, but also deteriorates the quality of agricultural products. [0003] In response to this, people began to pay attention to microbial fertilizers and use fertilizer synergists to reduce the amount of fertilizer used. Microbial powder needs to be loaded on organic materials, so the preparation method of many microbial fertilizers is to ...

AI Technical Summary

Problems solved by technology

When these trace materials are mixed with other powder fertilizers, it is difficult to mix them evenly due to the difference in specific gravity and fineness.

At the same time, the waste of materials to be wrapped by this method is large, and there will be situations where the adhesion is not firm, and the smoke and dust in the production process will be extremely large.

In the subsequent bagging and transportation, trace materials will fall off the surface of fertilizer granules and affect the use effect

There are also coating agents produced by some manufacturers that can add trace materials to them and then spray them, but these trace materials will precipitate in the coating agent and cause stratification, resulting in unstable product quality, and the coating agent and trace materials will be mixed. It becomes viscous, the pump does not move, and many problems such as clogged nozzles restrict the application of this method.

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