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Method for preparing circular granule nitrogen and potassium fertilizer

A granular nitrogen and round technology, which is applied in the field of preparation of round granular nitrogen and potassium fertilizers, can solve problems such as fertilizer nutrient deviation, nitrogen and potassium fertilizer limitations, and easy segregation of potassium, and achieve the goal of not increasing investment, solving segregation, and reducing energy consumption Effect

Inactive Publication Date: 2009-05-06
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

Potassium in extruded granules is easy to segregate, causing deviations in fertilizer nutrients; while traditional filler bonding granulation products have low nutrients and high costs; nitrogen and potassium fertilizers are limited to urea manufacturers

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] "10-0-30" round granular nitrogen and potassium fertilizer, the raw material formula is as follows: liquid ammonia: 66kg / t, sulfuric acid (mass concentration 98%, the same below): 176kg / t, urea: 100kg / t, potassium chloride: 500kg / t, sepiolite: 162kg / t.

[0023] The production steps of "10-0-30" round granular nitrogen and potassium fertilizer are as follows:

[0024] 1. Turn on the equipment in the workshop, and weigh the base material according to the "10-0-30" raw material formula: 50kg of urea, 250kg of potassium chloride, 119kg of ammonium sulfate, and 81kg of sepiolite. The speed of 500kg / h is added to the system, and the hot air system is turned on at the same time to preheat the bottom material to 60-70°C;

[0025] 2. Put 26kg / h of synthetic ammonia, 38L / h of sulfuric acid and 130L / h of washing liquid delivered by the pump into the tubular reactor for reaction to generate ammonium sulfate slurry, which is directly sprayed into the granulator At the same time, ...

Embodiment 2

[0029] "12-0-28" round granular nitrogen and potassium fertilizer, the raw material formula is as follows: liquid ammonia: 83kg / t, sulfuric acid (mass concentration 98%, the same below): 271kg / t, magnesium powder: 30kg / t, potassium chloride: 500kg / t, sepiolite: 142kg / t.

[0030] The production steps of "12-0-28" round granular nitrogen and potassium fertilizer are as follows:

[0031] 1. Turn on the equipment in the workshop, and weigh the bottom material according to the raw material formula of "12-0-28": 15kg of magnesium powder, 240kg of potassium chloride, 174kg of ammonium sulfate, 71kg of sepiolite, and mix them evenly through the solid mixer Add to the system at a rate of 500kg / h, and at the same time turn on the hot air system to preheat the bottom material to 60-70°C;

[0032] 2. Put 33kg / h of synthetic ammonia, 59L / h of sulfuric acid and 148L / h of washing liquid delivered by the pump into the tubular reactor for reaction to generate ammonium sulfate slurry, which is...

Embodiment 3

[0036] "12-0.5-28" round granular nitrogen and potassium fertilizer, the raw material formula is as follows: liquid ammonia: 107kg / t, sulfuric acid (mass concentration 98%, the same below): 309kg / t, ammonium nitrate phosphorus: 100kg / t, potassium chloride : 467kg / t, sepiolite: 23kg / t.

[0037] The production steps of "12-0.5-28" round granular nitrogen and potassium fertilizer are as follows:

[0038] 1. Turn on the equipment in the workshop, and weigh the bottom material according to the raw material formula of "12-0.5-28": 45kg of ammonium nitrate, 210kg of potassium chloride, 185kg of ammonium sulfate, 8kg of sepiolite, and mix them evenly through a solid mixer Then add it to the system at a rate of 500kg / h, and at the same time turn on the hot air system to preheat the bottom material to 60-70°C;

[0039]2. Put 43kg / h of synthetic ammonia, 66L / h of sulfuric acid and 190L / h of washing liquid delivered by the pump into the tubular reactor for reaction to generate ammonium s...

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Abstract

The invention relates to a method for preparing a nitrogen-kalium fertilizer with circular particles. The method comprises the following steps: (1) firstly, sulphuric acid, synthetic ammonia and washing water react to generate ammonium sulfate slurry through a tube-type reactor; the molar ratio of the sulphuric acid to the synthetic ammonia is between 1.8 to 1 and 2.2 to 1; the volume ratio of the washing water to the sulphuric acid is between 1 to 3 and 1 to 1; (2) the ammonium sulfate slurry generated in the step one is directly sprayed on a material of a rotary drum pelletizer for pelletization; and (3) particles formed in the step two are dried, sifted and cooled to obtain the qualified product. The method fully utilizes heat of reaction between the sulphuric acid and the synthetic ammonia and reduces energy consumption; in addition, the sulphuric acid contains nutrients of nitrogen and sulphur essential to plants, thereby improving total nutrients of the product.

Description

technical field [0001] The invention relates to a preparation method of granular nitrogen and potassium fertilizer, more precisely, relates to a preparation method of round granular nitrogen and potassium fertilizer. Background technique [0002] Blended fertilizer, which is formed by mixing elemental fertilizers (or multi-component fertilizers) in a certain proportion, is derived from the English BulkBlending Fertilizer, also known as BB fertilizer (hereinafter, for convenience of description, it is abbreviated as BB fertilizer in the present invention). Its characteristic is that the ratio of nitrogen, phosphorus, potassium and trace elements is easy to adjust, and various specifications of special fertilizers can be produced according to the needs of users. The formula is flexible and easy to adjust, which is very suitable for soil testing and fertilization. The three major elements of BB fertilizer are nitrogen, phosphorus, and potassium. Among them, nitrogen is mainly u...

Claims

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Application Information

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IPC IPC(8): C05G1/00C05G5/00
Inventor 郑秀兴王金铭宋安新梁红江石学勇苏晓明王金刚贲艳英
Owner 中国-阿拉伯化肥有限公司
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