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Method for improving anti-caking property of phosphorus-potassium nitrate fertilizer

A technology of phosphorus potassium nitrate and anti-caking, applied in ammonium orthophosphate fertilizer, alkaline orthophosphate fertilizer, potash fertilizer, etc., can solve the problems of large differences in physical properties and little attention to the physical properties of ammonium nitrate and phosphorus

Inactive Publication Date: 2017-09-08
中国-阿拉伯化肥有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The nutrient content of ammonium nitrate is the same, basically 32-4, but due to the difference of trace modifiers, such as trace elements, anti-riot agents, etc., the physical properties of ANP will vary greatly. As one of the raw materials of compound fertilizers, ANP used to be The focus is only on nutrient content and nitrate nitrogen content, and little attention is paid to the physical properties of ammonium nitrate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Embodiment 1 ammonium nitrate B is used as raw material to produce 22-8-10 compound fertilizer formula and technology:

[0049] (1) adding 37.88% (accounting for the total mass of fertilizer) of granular ammonium nitrate B and 20.6% (accounting for the total mass of fertilizer) of potassium sulfate into the drum granulator through the metering system to obtain solid phase materials;

[0050] (2) 11.22% (accounting for the total mass of fertilizer) liquid ammonia, 7.79% (accounting for the total mass of fertilizer) phosphorus pentoxide, 19.47% (accounting for the total mass of fertilizer) of sulfuric acid, after fully mixing in the tubular reactor, the liquid phase is obtained The material is sprayed into the solid material in step (1), and the liquid phase material and the solid phase material are coated with granulated particles in the drum granulator; the liquid phase material is controlled by the flow regulating valve to control the amount added per unit time; the ste...

Embodiment 2

[0053] Phosphorous ammonium nitrate B is used as raw material to produce 18-9-18 compound fertilizer formula and process:

[0054] (1) 39.14% (accounting for the total mass of fertilizer) of granular ammonium nitrate B and 36.37% (accounting for the total mass of fertilizer) of potassium sulfate are added to the drum granulator through the metering system to obtain solid phase materials;

[0055] (2) 5.59% (accounting for the total mass of fertilizer) liquid ammonia, 8.35% (accounting for the total mass of fertilizer) phosphorus pentoxide, and 7.00% (accounting for the total mass of fertilizer) of sulfuric acid, after fully mixing in the tubular reactor, the liquid phase is obtained The material is sprayed into the solid material in step (1), and the liquid phase material and the solid phase material are coated with granulated particles in the drum granulator; the liquid phase material is controlled by the flow regulating valve to control the amount added per unit time; the ste...

Embodiment 3

[0058] Phosphorous ammonium nitrate B is used as raw material to produce 18-9-18 compound fertilizer formula and process:

[0059] (1) 39.14% (accounting for the total mass of fertilizer) of granular ammonium nitrate B and 30.45% (accounting for the total mass of fertilizer) of potassium chloride, 5.1% (accounting for the total mass of fertilizer) of sepiolite (filler) through the metering system Add to the drum granulator to obtain solid phase material;

[0060] (2) 5.59% (accounting for the total mass of fertilizer) liquid ammonia, 8.35% (accounting for the total mass of fertilizer) phosphorus pentoxide, and 7.00% (accounting for the total mass of fertilizer) of sulfuric acid, after fully mixing in the tubular reactor, the liquid phase is obtained The material is sprayed into the solid material in step (1), and the liquid phase material and the solid phase material are coated with granulated particles in the drum granulator; the liquid phase material is controlled by the flo...

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Abstract

The invention discloses a method for improving anti-caking property of phosphorus-potassium nitrate fertilizer and belongs to the technical field of chemical fertilizer preparation. The method comprises the following steps: (1) sieving ammonium nitrate phosphate (ANP) by carrying out a briquetting experiment; (2) sieving the ANP by carrying out a bag throwing experiment; (3) adding granular or powdery ammonium nitrate phosphate according with the steps (1) and (2) at the same time and potassium sulfate or potassium chloride into a rotary drum granulator by virtue of a metering system, so that a solid-phase material is obtained; (4) fully mixing liquid raw materials, namely sulfuric acid, phosphorus pentoxide and liquid ammonia, in a tubular reactor, so that a liquid phase material is obtained, and spraying into the solid material in the step (3), and (5) drying, screening, cooling and packaging, so that a nitryl high-concentration granular compound fertilizer is obtained. The method disclosed by the invention has the characteristics that the raw materials are screened, the ANP with better anti-caking property is selected and used for producing high-nitrogen fertilizer, cost is not increased, equipment does not need to be added during implementation and the original production technology cannot be changed, and the aim of improving the anti-caking property of the compound fertilizer can be achieved by only controlling mass of the ANP.

Description

technical field [0001] The invention relates to a method for improving the anti-caking performance of compound fertilizers, in particular to a method for improving the anti-caking performance of nitro high-concentration compound fertilizers that can provide nitrate nitrogen with ammonium nitrate, and belongs to the technical field of chemical fertilizer preparation. Background technique [0002] Fertilizer compaction is unacceptable to users. The fertilizer compacts into large pieces and loses fluidity and dispersion, making it impossible to spread or mechanize fertilization. Therefore, the anti-caking performance of granular fertilizers is very important. [0003] According to the classification of nitrogen sources, compound fertilizers are divided into urea-based fertilizers and nitro-based fertilizers. The nitrogen source of urea-based fertilizers is composed of urea and ammonium nitrogen, and the nitrogen source of nitro-based fertilizers is composed of nitrate nitrogen a...

Claims

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Application Information

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IPC IPC(8): C05G3/00
CPCC05B7/00C05G3/00C05G5/30C05B11/06C05C3/00C05D1/02C05D5/00
Inventor 吴舒王金铭郑秀兴洪伟王金刚梁红江王连军李青山贲艳英任宇红
Owner 中国-阿拉伯化肥有限公司
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