Granular lime nitrogen capable of quickly releasing fertilizer effect and production technology thereof

Abstract

The invention discloses granular lime nitrogen capable of quickly releasing fertilizer effect. The lime nitrogen is synthesized by adopting a drop tube furnace and prepared from nitrogen and the following drying materials including, by weight, 62-68% of calcium carbide, 18-25% of melted calcium cyanamide, 4-9% of fluorite and 8-13% of sodium chloride, wherein the gas forming amount of the nitrogen is larger than or equal to 295 L/kg, and the purity of the nitrogen is larger than or equal to 99.6 percent; the surface of the final product is provided with pores through which water can permeate, and the porosity is larger than or equal to 8 percent. The invention further provides a production technology of the granular lime nitrogen capable of quickly releasing the fertilizer effect. According to the granular lime nitrogen capable of quickly releasing the fertilizer effect and the production technology thereof, due to the fact that a synthesizing technology of the drop tube furnace is adopted, the hardness of the product is smaller than that of a product synthesized by a traditional rotary kiln; the surface porosity is high, closed pores are fewer, water can easily enter the interior of the granular lime nitrogen, the decomposition speed is high, and the fertilizer effect can be fully released; compared with the average 90-day fertilizer effect releasing time of lime nitrogen produced by the rotary kiln, the granular lime nitrogen can achieve the same effect only needing 50 days.

Description

Technical field: [0001] The invention relates to an industrial synthesis technology of lime nitrogen, in particular to a quick-releasing fertilizer-effect granular lime nitrogen and a production process thereof. Background technique: [0002] The scientific name of lime nitrogen is calcium cyanamide, which is a chemical fertilizer that has been used for more than 100 years. From the 1960s to the mid-1970s, lime nitrogen began to be widely used in my country's agriculture, such as as a base fertilizer for rice, adjusting soil acidity, and supplementing plant calcium. However, because lime nitrogen is basically in the form of powder, the powder will fly and pollute the environment when it is applied. At the same time, powder lime nitrogen has a small specific gravity and floats on the ground or water surface when it is applied, which will easily cause the loss of fertilizer and the allergies and poisoning of humans and animals. Therefore, the use of lime nitrogen is basically...

AI Technical Summary

Problems solved by technology

[0005] 1. Dispersed lime nitrogen and granular lime nitrogen are products with the same technology, different processes and consistent performance. Their effective nitrogen loss is large, and the performance of the adhesive used is unstable, which is easy to cause internal heating, low strength, fragile, and not easy Storage and transportation

[0006] 2. The application area of ​​compound fertilizer granules is small, the limitations are large, and the characteristics of lime nitrogen cannot be fully utilized

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