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Controlled-release fertilizer and production method thereof

A technology of slow-release fertilizers and compound fertilizers, applied in fertilizer mixtures, fertilization devices, applications, etc., can solve problems such as high manufacturing costs and complex production processes, and achieve the effects of improving fertilizer efficiency, increasing crop yield, and inhibiting urease activity

Active Publication Date: 2014-05-21
CNSG ANHUI HONG SIFANG FERTILIZER IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These products have achieved good results in improving the utilization rate of nitrogen fertilizers, but due to complex production processes and high manufacturing costs, they have not been popularized and applied in large areas.

Method used

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  • Controlled-release fertilizer and production method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Total nutrients (N+P 2 o 5 +K 2 O) ≥ 44%, the specification is 20-11-13 (chlorine-containing) slow-release fertilizer, the specific process steps are as follows:

[0040] (1) Measure 135.1kg of ammonium chloride (containing N-24.0%), 72.0kg of ammonium sulfate (containing N-20.5%), and 540.3kg of urea (containing N-46.2%) respectively, and put the ammonium chloride and ammonium sulfate through chain The urea is crushed by a special crusher for urea, and then the crushed material is sent to a twin-shaft mixer, mixed with 54.0kg attapulgite powder, 36.0kg biochemical fulvic acid, 18.0kg chelated zinc, 0.5kg1-naphthaleneacetic acid Mix evenly, and then send to the disc granulator;

[0041] (2) Spray an appropriate amount of steam on the above-mentioned mixture in the disc granulator;

[0042] (3) One stage of drying, one stage of cooling and coarse and fine screening are adopted. After screening, particles with a particle size of 2.00-4.75mm enter the coating machine, ...

Embodiment 2

[0047] Total nutrients (N+P 2 o 5 +K 2 O) ≥ 41%, the specification is 18-12-11 (potassium sulfate type) slow-release fertilizer, the specific process steps are as follows:

[0048] (1) Measure 41.5kg of ammonium sulfate (containing N-20.5%) and 622.8kg of urea (containing N-46.2%) respectively, crush the ammonium sulfate through a chain crusher, and pass the urea through a special urea crusher, and then send the crushed materials to Enter in the twin-shaft mixer, mix evenly with 81.0kg attapulgite powder, 51.9kg biochemical fulvic acid, 25.9kg chelated zinc, 0.4kg1-naphthalene acetic acid, and then send it into the drum granulator;

[0049] (2) Spray an appropriate amount of steam on the above-mentioned mixture in the drum granulator;

[0050] (3) One stage of drying, one stage of cooling and coarse and fine screening are adopted. After screening, particles with a particle size of 2.00-4.75mm enter the coating machine, large particles larger than 4.75mm are returned to crus...

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Abstract

The invention discloses controlled-release fertilizer and a production method thereof. The controlled-release fertilizer comprises the following raw components in parts by weight: 600-700 parts of compound fertilizer and 300-400 parts of coated controlled-release nitrogen fertilizer. The production method comprises the following steps: breaking ammonium chloride, ammonium sulfate and urea according to a specified proportion, then uniformly mixing the broken materials with attapulgite powder, biochemical fulvic acid, chelated zinc and 1-naphthylacetic acid, feeding the mixture into a pelletizer, spraying steam, drying, cooling, sieving, feeding into a coating machine, spraying coated controlled-release formulation, drying so as to obtain the coated controlled-release nitrogen fertilizer, mixing the coated controlled-release nitrogen fertilizer with the compound fertilizer, and packaging so as to obtain the finished product. The controlled-release fertilizer has the advantages of high utilization rate of fertilizer, prolonged fertilizer efficiency period, crop yield increase, income increase, improvement of agricultural product quality, water retention, sterilization, improvement and fertilization of soil and is good in appearance quality, convenient for mechanized fertilization, low in production cost, simple in process, convenient to use and high in benefits.

Description

technical field [0001] The invention relates to the technical field of fertilizers, in particular to a slow-release fertilizer and a production method thereof. Background technique [0002] At present, the fertilizer effect on most crops in my country is still the highest with nitrogen fertilizer. Nitrogen is a nutrient element with special significance in plant life. Nitrogen fertilizer is the most widely used fertilizer in agriculture. Nitrogen fertilizer products mainly include urea, ammonium chloride, ammonium sulfate, ammonium bicarbonate, ammonium nitrate and liquid ammonia. Once ordinary nitrogen fertilizer is applied to the soil, it will undergo a series of biochemical changes under the action of various soil microorganisms and the enzymes they secrete, constantly changing its form, making it more mobile in the soil, and even leaching with water and following Gaseous volatile loss. According to estimates, the seasonal utilization rate of nitrogen fertilizer in my ...

Claims

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Application Information

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IPC IPC(8): C05G3/00C05G3/04C05G3/80
Inventor 束维正谢中平陈勇樊荣琦刘洪滨刘晓晖王莉陈国庆郑兴来
Owner CNSG ANHUI HONG SIFANG FERTILIZER IND CO LTD
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