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Slow-release compound fertilizer and production method thereof

A compound fertilizer and slow-release technology, which is applied in the direction of fertilizer mixture, fertilization device, application, etc., can solve the problems of high price and high product cost, and achieve the effects of low cost, reduced production cost and flexible product formula

Inactive Publication Date: 2013-06-26
济南厚源化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the practical application of this patent, in order to ensure the quality of the product, it is necessary to use industrial-grade phosphoric acid as a binder and provide phosphorus nutrients. Due to the high price of industrial-grade phosphoric acid, the cost of its products has increased

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0089] Embodiment 1: the production of slow release compound fertilizer

[0090] The implementation steps of this embodiment are as follows:

[0091] Add the urea water-soluble granular fertilizer with a particle size of 2.0 to 5.3mm to the compound fertilizer wrapping machine sold by Zhengzhou Jinhai Heavy Industry Co., Ltd. under the trade name disc granulator, and spray the 18% monoammonium phosphate aqueous solution binder by weight on the On the surface of the water-soluble granular fertilizer, make the surface of the water-soluble granular fertilizer evenly wet, then add 80 mesh light burnt magnesium powder inorganic slow-release agent, after the surface dries, then repeat the above operation until The weight ratio of the water-soluble granular fertilizer to the powdered inorganic slow-release agent reaches 30:8;

[0092] Next, continue to spray the binder, add a mixture composed of monoammonium phosphate and calcium magnesium phosphate fertilizer additive according to ...

Embodiment 2

[0095] Embodiment 2: the production of slow release compound fertilizer

[0096] The implementation steps of this embodiment are as follows:

[0097] Add the ammonium nitrate water-soluble granular fertilizer with a particle size of 2.0 to 5.3mm to the compound fertilizer wrapping machine sold by Zhengzhou Jinhai Heavy Industry Co., Ltd. under the trade name disc granulator, and spray 32% by weight monoammonium phosphate aqueous binder On the surface of the water-soluble granular fertilizer, make the surface of the water-soluble granular fertilizer evenly wet, then add 300 mesh calcined dolomite powder powdery inorganic slow-release agent, after the surface becomes dry, then repeat the above operation, until the weight ratio of the water-soluble granular fertilizer to the powdered inorganic slow-release agent reaches 70:25;

[0098] Then, continue to spray the binder, add a mixture of equal amounts of diammonium phosphate, potassium chloride water-soluble fertilizer and calci...

Embodiment 3

[0101] Embodiment 3: the production of slow release compound fertilizer

[0102] The implementation steps of this embodiment are as follows:

[0103] Add the potassium nitrate water-soluble granular fertilizer with a particle size of 2.0-4.0 mm to the compound fertilizer wrapping machine sold by Zhengzhou Jinhai Heavy Industry Co., Ltd. under the trade name disc granulator, and spray the 5% monoammonium phosphate aqueous solution binder by weight On the surface of the water-soluble granular fertilizer, make the surface of the water-soluble granular fertilizer evenly wet, then add 100 mesh light burnt magnesium powdery inorganic slow-release agent, after the surface becomes dry, then repeat the above operation, until the weight ratio of the water-soluble granular fertilizer to the powdered inorganic slow-release agent reaches 20:5;

[0104] Then, continue to spray the binder, add a mixture of monoammonium phosphate water-soluble fertilizer and light burnt magnesium additive ac...

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Abstract

The invention relates to a slow-release compound fertilizer and a production method thereof. The slow-release compound fertilizer comprises a water-soluble granular fertilizer core and a coating layer, wherein the coating layer includes 2-3 coating layers; and the content of N, P2O5 and K2O which are contained in the slow-release compound fertilizer is respectively 4%-33%, 4%-30% and 0%-30% accounting for the total weight of the slow-release compound fertilizer. According to the invention, the coating layer of the slow-release compound fertilizer is not made from high-molecular materials or other organic polymers, the cost is reduced, and the secondary pollution of the organic polymer or the high-molecular materials on the soil is prevented; and a product formula is flexible, a production process is simplified by integrating the preparation process and compound (mixed) fertilizer production process of the slow-release compound fertilizer into a whole, the equipment investment is saved, the convenience for realizing large-scale industrial production is achieved, and no three wastes are discharged in the production process. Compared with the prior art, the slow-release compound fertilizer disclosed by the invention enhances the slow-release effect to a certain degree and meets the requirements of a chemical industry standard HG / T 4217-2011.

Description

【Technical field】 [0001] The invention belongs to the technical field of fertilizers. More specifically, the present invention relates to a slow-release compound fertilizer, and also relates to a production method of the slow-release compound fertilizer. 【Background technique】 [0002] One of the most important tasks in the current development of the fertilizer industry is to increase the utilization rate of fertilizers, especially nitrogen fertilizers. There are many ways to increase the utilization rate of chemical fertilizers. From an agricultural point of view, the utilization rate of chemical fertilizers can also be increased through multiple fertilization and other agronomic measures. However, with the development of modern economy and agriculture, such measures are becoming more and more unsuitable. development needs. Therefore, improving the utilization rate of chemical fertilizers is mainly achieved by improving the characteristics of chemical fertilizers themselv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00
Inventor 王好斌郭建文曹振勇李菂萍侯翠红许秀成
Owner 济南厚源化工有限公司
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