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Tower granulation slow release long-acting nitrogen phosphorus potassium compound fertilizer and preparation method thereof

A high-tower granulation and compound fertilizer technology, which is applied in the direction of fertilizer mixture, fertilization device, application, etc., can solve the problems of expensive resin coating, fertilizer decomposition and loss of blocks, and no literature reports, etc., so as to benefit the soil and Air and water environmental protection, beneficial environmental protection, and the effect of simplifying the granulation production process

Active Publication Date: 2012-01-18
STANLEY AGRI GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The nutrient utilization rate of traditional nitrogen, phosphorus and potassium compound fertilizers is only 25%-35%, of which the utilization rate of nitrogen fertilizer is less than 30%, the loss is particularly serious, and it leads to soil pollution and air pollution
[0003] Chinese patent CN 200510102650.8 discloses a melt slurry tower granulation compound fertilizer and its manufacturing method. One of the technical problems to be solved is that the structure of the compound fertilizer produced by the traditional granulation method is relatively loose, the fertilizer dissolves and releases quickly, and the fertilizer efficiency is high. Break down lost blocks, problems with low fertilizer use efficiency
Resin coatings are expensive and do not degrade easily in soil
[0005] At present, the high-tower granulation slow-release long-acting nitrogen, phosphorus and potassium compound fertilizer has not yet been reported in the literature.

Method used

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  • Tower granulation slow release long-acting nitrogen phosphorus potassium compound fertilizer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] Embodiment 1 Prepare the high-tower granulation slow-release long-acting nitrogen, phosphorus and potassium compound fertilizer of the present invention according to the following steps

[0068] Step 1. Preparation of high-tower granulated urea-based compound fertilizer granules

[0069] a. Urea melting

[0070] Accurately weigh 40 parts by weight of urea and put it into the melting tank, heat it to 125°C-138°C, and prepare for primary mixing;

[0071] b. Preheating of monoammonium phosphate and potassium chloride

[0072] Accurately weigh 25 parts by weight of monoammonium phosphate and 35 parts by weight of potassium chloride, put them into a primary mixing tank, preheat to 40°C to 60°C, and set aside;

[0073] c. Co-melt preparation

[0074] Send the molten urea prepared in step a into the first-level mixing tank, mix it with the preheated monoammonium phosphate and potassium chloride in step b, and then put it into the second-level mixing tank, and mix it evenly....

Embodiment 2～ Embodiment 7

[0086] According to the method and steps of Example 1, according to the formula in Table 1, the high-tower granulation slow-release long-acting nitrogen, phosphorus and potassium compound fertilizer of the present invention is prepared

[0087] Table 1

[0088] raw material

[0089] The high-tower granulation slow-release long-acting NPK compound fertilizer that embodiment 1~embodiment 7 makes is all applicable to wheat, corn, paddy rice field crop and vegetable application, improves fertilizer utilization rate 10.5%-18.7% on average, to crop The average yield is increased by 5.3%-14.9%, and the average yield of vegetables is increased by 11%-31.2%.

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Abstract

The invention discloses a tower granulation slow release long-acting nitrogen phosphorus potassium compound fertilizer and a preparation method thereof, and belongs to compound fertilizers. The preparation method comprises the following steps of: preparing tower granulation urea-based compound fertilizer granules by using a tower granulation device; and then performing wax primary coating and modified zeolite powder surface secondary coating on the urea-based compound fertilizer granules to prepare tower granulation urea-based compound fertilizer granules, wherein the tower granulation urea-based compound fertilizer granules consist of the following raw materials in parts by weight: 33-50 parts of urea, 10-26 parts of monoammonium phosphate and 30-41 parts of potassium chloride; the amount of used wax is 0.5-1.0 percent of the mass of the tower granulation urea-based compound fertilizer granules; and the modified zeolite powder consists of the following raw materials in percentage by weight: 1-5 percent of zinc stearate and 95-99 percent of zeolite powder. The tower granulation slow release long-acting nitrogen phosphorus potassium compound fertilizer which has the advantages of good slow release effect, high fertilizer nutrient utilization rate, simple process, low cost and contribution to environmental protection in use with the tower granulation device and the preparation method thereof are provided.

Description

technical field [0001] The invention relates to a high-tower granulation slow-release long-acting nitrogen, phosphorus and potassium compound fertilizer and a preparation method thereof. It belongs to mixed fertilizer. Background technique [0002] The nutrient utilization rate of traditional nitrogen, phosphorus and potassium compound fertilizers is only 25%-35%, and the utilization rate of nitrogen fertilizer is less than 30%. The loss is particularly serious, and it leads to soil pollution and air pollution. [0003] Chinese patent CN 200510102650.8 discloses a melt slurry tower granulation compound fertilizer and its manufacturing method. One of the technical problems to be solved is that the structure of the compound fertilizer produced by the traditional granulation method is relatively loose, the fertilizer dissolves and releases quickly, and the fertilizer efficiency is high. Break down loss blocks, problems with low fertilizer use efficiency. The technical solutio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G1/00C05G3/08C05G3/90
Inventor 高进华吕庆淮解学仕吕瑞新吕凤菊
Owner STANLEY AGRI GRP CO LTD
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