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Method for preparing high-tower granulation slow-release long-acting sulfenyl nitrogen and phosphorus compound fertilizer

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 fertilizer efficiency decomposition and loss, soil pollution, high production cost, etc., and achieve simplified granulation production process, uniform nutrient distribution, The effect of saving drying energy

Active Publication Date: 2013-10-23
STANLEY AGRI GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the nutrient utilization rate of sulfur-based compound fertilizers in the prior art 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.
[0004] The production process of sulfur-based compound fertilizer is complicated, the production energy consumption is high, the equipment is corroded, and resources are wasted, which leads to high production cost and pollutes the environment
[0005] Chinese patent CN200510102650.8 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, and the fertilizer dissolves and releases quickly. Fertilizer efficiency decomposes and loses blocks, and the fertilizer utilization rate is low
Resin coatings are expensive and do not degrade easily in soil
[0007] There is no literature report on the high tower granulation slow-release long-acting sulfur-based nitrogen-phosphorus compound fertilizer in the prior art

Method used

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  • Method for preparing high-tower granulation slow-release long-acting sulfenyl nitrogen and phosphorus compound fertilizer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0093] Prepare the high-tower granulation slow-release long-acting sulfur-based nitrogen-phosphorus compound fertilizer of the present invention according to the following steps

[0094] Step 1. Preparation of high-tower granulated compound fertilizer granules

[0095] a. Urea melting

[0096] Accurately weigh 35 parts by weight of urea, put it into a melting tank, heat to 133°C for melting, and prepare for primary mixing;

[0097] b. Monoammonium phosphate, ammonium sulfate preheating

[0098] Accurately weigh 38 parts by weight of monoammonium phosphate and 27 parts by weight of ammonium sulfate, put them into a primary mixing tank, preheat to 58°C, and set aside;

[0099] c. Co-melt preparation

[0100] Send the molten urea prepared in step a into the primary mixing tank, mix it with the preheated monoammonium phosphate and ammonium sulfate in step b, and then put it into the secondary mixing tank, and mix it evenly, and the slurry mixing time is less than 4min to form ...

Embodiment 2～ Embodiment 7

[0113] According to the method and steps of Example 1, according to the formula in Table 1, prepare the high-tower granulation slow-release long-acting sulfur-based nitrogen-phosphorus compound fertilizer of the present invention

[0114] Table 1

[0115] raw material

[0116] The high-tower granulated slow-release long-acting sulfur-based nitrogen-phosphorus compound fertilizers prepared in Examples 1 to 7 are all applicable to various field crops, vegetables and fruit trees, and can increase the fertilizer utilization rate by 10%-20% on average.

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Abstract

The invention discloses a high-tower granulation slow-release long-acting high-nitrogen sulfenyl compound fertilizer and a preparation method of the high-tower granulation slow-release long-acting high-nitrogen sulfenyl compound fertilizer, and belongs to compound fertilizers. High-tower granulation urea compound fertilizer particles are prepared by a high-tower granulation device, then wrapped by paraffin for the first time and wrapped by modified zeolite powder for the second time, so that the high-tower granulation slow-release long-acting high-nitrogen sulfenyl compound fertilizer is prepared. The high-tower granulation urea compound fertilizer particles consist of the following raw materials in parts by weight: 33 to 43 parts of urea, 26 to 38 parts of monoammonium phosphate and 19 to 41 parts of ammonium sulfate; the using amount of the paraffin for wrapping for the first time is 0.5 to 1.0 percent of the mass of the high-tower granulation urea compound fertilizer particles; and the modified zeolite powder consists of the following raw materials in parts by weight: 1 to 5 parts of zinc stearate and 95 to 99 parts of zeolite powder. The preparation method can be mated with the high-tower granulation device, and the high-tower granulation slow-release long-acting high-nitrogen sulfenyl compound fertilizer has a good slow-release effect and high fertilizer nutrient utilization rate, is simple in process, relatively low in production cost and beneficial for soil, atmosphere and water environment protection.

Description

technical field [0001] The invention relates to a high-tower granulation slow-release long-acting sulfur-based nitrogen-phosphorus compound fertilizer and a preparation method thereof. It belongs to compound fertilizer. Background technique [0002] The sulfur element in the sulfur-based compound fertilizer is the fourth nutrient element necessary for crop growth after nitrogen, phosphorus, and potassium. The content of chloride ions is less than 3%, which can effectively improve the soil sulfur deficiency and directly provide sulfur nutrients for crops. Sulfur-based compound fertilizer has strong adaptability to crops and soil, and has a wide range of applications. It is suitable for various food crops and economic crops, as well as chlorine-resistant crops such as tobacco, sugarcane, potato, and tea. It can be used as base fertilizer, topdressing fertilizer, seed fertilizer and root fertilizer. Top dressing outside. It plays an extremely important role in increasing the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C05G1/00C05G3/08C05G3/90
Inventor 吕庆淮高进华解学仕王立斌吕瑞新
Owner STANLEY AGRI GRP CO LTD