Additive for improving strength of potassium sulfate type compound fertilizer particles and preparation method for high-strength compound fertilizer particles

A technology of potassium sulfate type and compound fertilizer, which is applied in the direction of fertilization device, fertilizer mixture, application, etc., can solve the problems of increasing the cost of compound fertilizer raw materials, and achieve the effect of improving strength

Active Publication Date: 2016-12-14
SINOCHEM YUNLONG
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Such as patent CN 104058902 A has announced a kind of "composite fertilizer anti-powdering agent and its application", adding water-soluble polymer resin and inorganic salt with water-absorbing effect when compound fertilizer is granulated, which can improve the anti-powdering ability of compound fertilizer , Enhance the strength of fertilizer granules, but it will increase the raw material cost of compound fertilizer

Method used

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  • Additive for improving strength of potassium sulfate type compound fertilizer particles and preparation method for high-strength compound fertilizer particles

Examples

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Effect test

Embodiment 1

[0023] An additive for improving the particle strength of potassium sulfate type compound fertilizer, its raw material is 25%P by 200 parts of sulfuric acid, 100 parts of concentration 2 o 5 Dilute phosphoric acid, 300 parts mass concentration is 98% potassium sulfate solid composition.

[0024] A preparation method for high-strength compound fertilizer granules, comprising the following steps:

[0025] 1. Take 100 parts of dilute phosphoric acid and 300 parts of potassium sulfate solid slurry tank, and stir to form a mixed slurry of potassium sulfate and dilute phosphoric acid;

[0026] 2. Feed the mixed slurry obtained above with 200 parts of sulfuric acid and steam into a tubular reactor for reaction to generate a large amount of high-temperature and high-pressure superheated steam to generate potassium bisulfate, potassium sulfate and phosphoric acid molten slurry;

[0027] 3. Send 1531 parts of powdered ammonium phosphate, 1769 parts of urea, 555 parts of ammonium sulfa...

Embodiment 2

[0032] An additive for improving the particle strength of potassium sulfate type compound fertilizer. Its raw materials are 160 parts of sulfuric acid and 100 parts of concentration of 20.78% P 2 o 5 Dilute phosphoric acid, 300 parts mass concentration is 98% potassium sulfate solid composition.

[0033] A preparation method for high-strength compound fertilizer granules, comprising the following steps:

[0034] 1. Take 100 parts of dilute phosphoric acid and 300 parts of potassium sulfate solid slurry tank, and stir to form a mixed slurry of potassium sulfate and dilute phosphoric acid;

[0035] 2. Feed the mixed slurry obtained above with 160 parts of sulfuric acid and steam into a tubular reactor for reaction to generate a large amount of high-temperature and high-pressure superheated steam to generate potassium bisulfate, potassium sulfate and phosphoric acid molten slurry;

[0036] 3. Send 2106 parts of powdered ammonium phosphate, 813 parts of urea, 906 parts of ammoni...

Embodiment 3

[0041] An additive for improving the particle strength of potassium sulfate type compound fertilizer, its raw material is 20%P by 140 parts of sulfuric acid, 100 parts of concentration 2 o 5 Dilute phosphoric acid, 100 parts mass concentration is 98% potassium sulfate solid composition.

[0042] A preparation method for high-strength compound fertilizer granules, comprising the following steps:

[0043]1. Take 100 parts of dilute phosphoric acid and 100 parts of potassium sulfate solid slurry in the tank, and stir to form a mixed slurry of potassium sulfate and dilute phosphoric acid;

[0044] 2. Feed the mixed slurry obtained above with 140 parts of sulfuric acid and steam into a tubular reactor for reaction to generate a large amount of high-temperature and high-pressure superheated steam to generate potassium bisulfate, potassium sulfate and phosphoric acid molten slurry;

[0045] 3. Send 2106 parts of powdered ammonium phosphate, 813 parts of urea, 932 parts of ammonium ...

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Abstract

The invention discloses an additive for improving the strength of potassium sulfate type compound fertilizer particles and a preparation method for the high-strength compound fertilizer particles. The additive is prepared from diluted phosphoric acid, potassium sulfate solids and sulfuric acid. The preparation method of the high-strength compound fertilizer particles includes the steps that after diluted phosphoric acid and the potassium sulfate solids are stirred and mixed, the mixture reacts with sulfuric acid and steam, and potassium hydrogen sulfate, potassium sulfate and phosphoric acid melted slurry is generated; the melted slurry is fed into a pelletizer opening to be atomized and aminated with ammonia gas, and meanwhile fertilizer is subjected to spray granulation; the compound fertilizer materials obtained after spray granulation continue to be subjected to adhesion granulation in a pelletizer; the compound fertilizer materials obtained after adhesion granulation are dried, screened, cooled and packaged, and then a compound fertilizer product is obtained. According to the additive for improving the strength of the potassium sulfate type compound fertilizer particles and the preparation method for the high-strength compound fertilizer particles, the additive is applied to compound fertilizer granulation, the strength of the compound fertilizer particles can be effectively enhanced, and the probability of pulverization and caking is greatly reduced.

Description

technical field [0001] The invention belongs to the technical field of compound fertilizer production, and specifically relates to an additive for improving the strength of potassium sulfate type compound fertilizer particles and a preparation method of high-strength compound fertilizer particles. Background technique [0002] The traditional compound fertilizer production process is mainly steam granulation and drum drying. The main raw materials of this traditional production process are urea, ammonium sulfate, ammonium chloride, monoammonium phosphate (powder), heavy calcium, general calcium, calcium Magnesium phosphate fertilizer, potassium sulfate, potassium chloride, etc. These raw materials are often divided into sandy materials (such as potassium chloride, potassium sulfate, etc.) etc.); in the NPK processing process, the sandy fine powder material is in the drum granulator under certain conditions such as temperature and pH value, and the amount of liquid phase (suc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G1/00
Inventor 谭伟盛勇周佩陈明凤邹小丽
Owner SINOCHEM YUNLONG
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