Multifunctional organic/inorganic compound fertilizer and preparation method thereof

Abstract

The invention provides a multifunctional organic / inorganic compound fertilizer and a preparation method thereof. The compound fertilizer is composed of the following raw materials by weight percent: 25-30% of urea, 5-10% of monoammonium phosphate, 10-18% of potassium sulphate, 27-32% of humic acid, 1.5-3% of zinc sulfate, 0.1-0.3% of microorganism bacterial liquid, 12-20% of diatomite and 1.9-2.7% of sophorolipid, wherein humic acid is obtained from decomposed coal through activation treatment. During preparation, urea, monoammonium phosphate, potassium sulphate, humic acid, zinc sulfate, microorganism bacterial liquid, diatomite and sophorolipid are added to a mixing crusher for crushing, so that a powdery mixture is obtained; the powdery mixture is added to a drum coating-pelleting-drying-cooling integrated machine to be pelleted, dried and cooled so that a granular mixture is obtained; the microorganism bacterial liquid and the diatomite are mixed and then sprayed to the mixture so that a crude product of the multifunctional organic / inorganic compound fertilizer is obtained; and finally, the crude product is added to a vibrating sieve for screening and then the obtained oversize is the multifunctional organic / inorganic compound fertilizer.

Description

technical field [0001] The invention relates to a fertilizer, specifically a multifunctional organic-inorganic compound fertilizer and a preparation method thereof. Background technique [0002] Compound fertilizer is a mixed fertilizer used for most crops in order to achieve a variety of fertilization effects. It is welcomed by farmers because of its convenient use, time-saving and labor-saving. Humic acid is the bridge that combines inorganic fertilizer and organic fertilizer in compound fertilizer. The activity of humic acid directly affects the utilization rate of inorganic fertilizer and organic fertilizer. In order to improve the activity of humic acid, the maximum activation in the process of preparing humic acid is the key, but to achieve good activation performance, the raw material generally needs a reaction cycle of 7-10 days; and after the compound fertilizer enters the soil, in order to To maintain the long-term fertilization performance of fertilizers and prev...

AI Technical Summary

Problems solved by technology

In order to improve the activity of humic acid, the maximum activation in the process of preparing humic acid is the key, but to achieve good activation performance, the raw material generally needs a reaction cycle of 7-10 days; and after the compound fertilizer enters the soil, in order to To maintain the long-term fertilization performance of fertilizers and prevent the rapid release of inorganic fertilizers, humic acids are required to be passivated to slow down the release rate of nitrogen, phosphorus and potassium. However, highly activated humic acids are difficult to passivate, resulting in excessive release of fertilizers. Fast, requires frequent supplemental fertilization

In the process of preparing compound fertilizer, it needs to go through steps such as granulation, drying, cooling, and bacterial agent spraying. The granulation is completed in the granulator, the drying is completed in the dryer, and the bacterial agent is sprayed in the mixer. Complete, each step is carried out in its own device, the steps are cumbersome, the material transfer process will cause losses, and the yield will decrease; the cooling adopts natural cooling to cool down, and the cooling time is long, reducing work efficiency

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