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Potassium nitrate low-tower granulation method and potassium nitrate particles prepared thereby

A technology of potassium nitrate and granulation, which is applied in the field of potassium nitrate granules, which can solve the problems of uneven granulation, large particle size, and easily broken particles, and achieve the effect of less particle breakage, uniform particle size and high purity

Active Publication Date: 2021-04-13
四川省什邡市农科化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] For the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a kind of potassium nitrate low tower granulation method and the potassium nitrate granules prepared thereof, adopt this method, solve the height of the traditional high tower granulation tower of potassium nitrate, the particle is easy to Crushing, granulation is uneven and round, the particle size is too large, there are many returned materials, and the empty shell rate is high.

Method used

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  • Potassium nitrate low-tower granulation method and potassium nitrate particles prepared thereby
  • Potassium nitrate low-tower granulation method and potassium nitrate particles prepared thereby
  • Potassium nitrate low-tower granulation method and potassium nitrate particles prepared thereby

Examples

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Effect test

Embodiment 1

[0043] Put powdered potassium nitrate with a purity of 99.0% into a melting furnace for heating and melting, and keep stirring, control the heating temperature to 330°C, and stir for 10 minutes until the raw material is completely melted to obtain liquid potassium nitrate, and pass the liquid potassium nitrate through the delivery pipeline Transported to the upper part of the granulation tower with a tower height of 10 meters and heated to 330°C by a high-frequency induction heater in the rotary granulator, the liquid potassium nitrate is evenly dispersed and falls under the action of the granulation head of the rotary granulator, so that the nitric acid Potassium droplets are solidified and granulated into balls while falling inside the high-temperature prilling tower to form spherical potassium nitrate particles, which are dropped into the collection tank for collection. The temperature of the collected spherical potassium nitrate particles is 110°C , and cooled to 60°C throu...

Embodiment 2

[0045] Put powdered potassium nitrate with a purity of 99.4% into a melting furnace for heating and melting, and keep stirring, control the heating temperature to 340°C, and stir for 30 minutes until the raw material is completely melted to obtain liquid potassium nitrate, and pass the liquid potassium nitrate through the delivery pipeline Transported to the upper part of the granulation tower with a tower height of 10 meters and heated to 330°C by a high-frequency induction heater in the rotary granulator, the liquid potassium nitrate is evenly dispersed and falls under the action of the granulation head of the rotary granulator, so that the nitric acid Potassium droplets are solidified and granulated into balls while falling inside the high-temperature prilling tower to form spherical potassium nitrate particles, which are dropped into the collection tank for collection. The temperature of the collected spherical potassium nitrate particles is 110°C , and cooled to 70°C throu...

Embodiment 3

[0047] Put powdered potassium nitrate with a purity of 99.7% into a melting furnace for heating and melting, and keep stirring, control the heating temperature to 360°C, and stir for 15 minutes until the raw material is completely melted to obtain liquid potassium nitrate, and pass the liquid potassium nitrate through the delivery pipeline Transported to the upper part of the granulation tower with a tower height of 10 meters and heated to 330°C by a high-frequency induction heater in the rotary granulator, the liquid potassium nitrate is evenly dispersed and falls under the action of the granulation head of the rotary granulator, so that the nitric acid Potassium droplets are solidified and granulated into balls while falling inside the high-temperature prilling tower to form spherical potassium nitrate particles, which are dropped into the collection tank for collection. The temperature of the collected spherical potassium nitrate particles is 110°C , and cooled to 65°C throu...

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Abstract

The invention belongs to the technical field of potassium nitrate manufacturing, and provides a potassium nitrate low-tower granulation method and potassium nitrate particles prepared thereby. The potassium nitrate low-tower granulation method comprises the following steps of: putting powdery potassium nitrate into a melting heating furnace for heating and melting, continuously stirring until the raw materials are completely melted to obtain liquid potassium nitrate, sending the liquid potassium nitrate into a rotary granulator at the upper part of a granulation tower, enabling the liquid potassium nitrate to uniformly disperse and fall under the action of a granulation head of the rotary granulator to form spherical potassium nitrate particles, cooling the spherical potassium nitrate particles through a vibrated fluidized bed, screening, and packaging to obtain finished potassium nitrate particles. The granulation method provided by the invention is simple in process and low in energy consumption, and the prepared finished potassium nitrate particles are less broken, uniform and round, free of material returning, almost zero in empty shell rate, good in product flowability, high in pressure resistance, long in caking period, beneficial to storage and transportation and convenient to use.

Description

technical field [0001] The invention belongs to the technical field of potassium nitrate production, and in particular relates to a low-tower granulation method for potassium nitrate and potassium nitrate granules prepared therefrom. Background technique [0002] Potassium nitrate is an important industrial raw material and a high-quality chlorine-free potassium nitrogen compound fertilizer. It is widely used in national defense, military industry, industry, agriculture, food additives, medicine, feed additives, optical glass and electronic industries. Due to the influence of crystal shape, composition, structure, surface area, physical and chemical properties and surrounding storage environment, potassium nitrate is very easy to agglomerate, which brings difficulties to storage, transportation and use. Therefore, it is necessary to granulate potassium nitrate to reduce the particle size and make the transportation, storage and use of potassium nitrate more convenient. [0...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01D9/18
CPCC01D9/18Y02P20/10
Inventor 周宗模
Owner 四川省什邡市农科化工有限公司
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