Nitrogen fertilizer synergistic fertilizer and preparation method thereof

Abstract

The embodiment of the invention provides a nitrogen fertilizer synergistic fertilizer and a preparation method thereof, and the preparation method comprises the following steps: heating and melting urea dust to obtain urea liquid; mixing zinc sulfate andtheurea liquid to obtain a material I; mixing three raw materials of urease inhibitor, nitrification inhibitor and alginic acid to obtain a material II; mixing bentonite and the material II in proportion, and uniformly mixing to obtain a material III; mixing the material I and bentonite to obtain a material IV; mixing the material IV and the material III to obtain a semi-finished product raw material; and carrying out extrusion granulation on the semi-finished product raw material to obtain the nitrogen fertilizer synergistic fertilizer. Inthe method, common urea or a common compound fertilizer taking urea as a nitrogen source is combined, so that the long-acting effect of the common fertilizer can be realized. Different from an existing stable urea product, the technology does not need to be combined with a urea system and can be independently used. Matched research of a stable urea production process is avoided, production is easy and convenient, the cost of auxiliaries and solvents can be reduced, and the burden of a system is reduced.

Description

technical field [0001] The invention relates to the technical field of agricultural fertilizers, in particular to a nitrogen fertilizer synergistic fertilizer and a preparation method thereof. Background technique [0002] At present, under the market background of weak domestic demand and continuous decline in urea prices in the international market, many urea companies are seeking to upgrade the technology of urea products. The production of long-acting, functional and environmentally friendly high value-added urea products is a solution to the current urea effective approach to the dilemma. It is a common practice in the industry to introduce inhibitors into the urea production system to produce stable urea containing inhibitors. However, in the actual application process, the addition of inhibitors has limiting factors on the selection of temperature and solvent additives. For the current common urease inhibitors and nitrification inhibitors, it is common that the produ...

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Problems solved by technology

However, in the actual application process, the addition of inhibitors has limiting factors on the choice of temperature and solvent additives. For the current common urease inhibitors and nitrification inhibitors, it is common that the production temperature is too high to cause the decomposition of the agent to fail and insoluble. The medicament needs to add additional additives, which increases the cost, and the chemical medicament increases the pressure of the system, etc.

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