Long-acting carbamide and preparation method thereof

Abstract

The invention relates to a long-term urea, in which agricultural waste peanut shell is used as a carrier, and a little of hydroquinone, dicyanodiamide and urea are added to prepare the product. The weight percentage contents of each component of the invention are that: peanut 10%-30%, hydroquinone 0.01%-0.1%, dicyanodiamide 0.02%-0.2%, and urea 69.97%-89.97%. The preparation steps are that: (1) activated peanut shell with the size of 0.25mm- 0.5mm and urea are molten and mixed in a certain proportion and fully stirred; (2) hydroquinone and dicyanodiamide are respectively prepared into 10% water solution; (3) the hydroquinone solution and the dicyanodiamide solution prepared by step (2) are sprayed to the middle part of the granulating tower. The most important characteristics of the invention is to employ agricultural waste peanut, which not only has low cost, but also has wide source, and can greatly enhance the utilization factor, prolong the fertilizer effective term or urea, decrease the cost, and is free of earth and environmental pollution, non-poisonous and harmless.

Description

Technical field: [0001] The invention relates to a urea fertilizer, in particular to a long-acting urea with agricultural waste peanut shells as a carrier and a preparation method thereof. Background technique: [0002] Chemical fertilizer plays an important role in agricultural production, and is the largest material investment in agricultural production, accounting for about 50% of its total productive expenditure. Due to the comprehensive influence of fertilizer properties and soil environmental conditions, low fertilizer use efficiency is a common problem in the use of chemical fertilizers. Urea, in particular, is the most widely used fertilizer in my country's agricultural production, but its utilization rate is only 30% to 40%, resulting in excessive fertilization, which brings a series of problems such as huge economic losses and environmental pollution. Therefore, improving the utilization rate of chemical fertilizers, reducing environmental pollution caused by fert...

AI Technical Summary

Problems solved by technology

However, most technologies focus on improving fertilizer efficiency and increasing the utilization rate of fertilizers, ignoring the considerations of continuous use of fertilizers to improve soil environmental quality, improve soil comprehensive fertility, reduce soil pollution, and protect the agricultural ecological environment.

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