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Potash fertilizer granulation method and granules thereof

A potash fertilizer and granulation technology, which is applied to potash fertilizers, inorganic fertilizers, fertilization devices, etc., can solve the problems of high cost of melt spray granulation, irregular potash fertilizer particles, and difficult drying operation, so as to achieve high degree of automation and improve utilization rate , The effect of simple process

Active Publication Date: 2015-01-28
GUANGDONG MIGAO CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The present invention is aimed at the above-mentioned patents, the drying operation of the agglomeration granulation process is difficult, the appearance is poor, the granules are uneven, and the strength is low; the potash fertilizer granules produced by the roller extrusion method are irregular and the output is small; Can be large and other shortcomings, provide a kind of potassium fertilizer extrusion granulation method

Method used

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  • Potash fertilizer granulation method and granules thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] 1) Weigh 90kg of potassium chloride powder, 5kg of paraffin wax, and 5kg of polyethylene wax and send them into the stirring mill for micronization and surface treatment.

[0037] 2) During the operation of the stirring mill, the temperature of the control system is 90°C, and the processing time is 60 minutes.

[0038]3) Select a screw extruder with a screw diameter of 40mm and a length-to-diameter ratio of 24:1. The barrel temperature setting range is 80~100°C, the die aperture is 3mm, the temperature is set at 90°C, and the screw speed is set It is 260r / min.

[0039] 4) Send the potash fertilizer powder into the screw extruder with various parameters set, after feeding, compressing and homogenizing, finally extruding through the die, and cutting into pellets.

[0040] 5) Cool and sieve the potash fertilizer granules to obtain qualified potash fertilizer granules: particle size 2~4mm, nutrient content 52.2, particle strength 58N.

Embodiment 2

[0042] 1) Weigh 92kg of potassium chloride powder, 4kg of glyceryl monostearate, and 4kg of stearyl alcohol and send them into a stirring mill for micronization and surface treatment.

[0043] 2) During the operation of the stirring mill, the temperature of the control system is 70°C, and the processing time is 40 minutes.

[0044] 3) Select a screw extruder with a screw diameter of 60mm and a length-to-diameter ratio of 24:1. The barrel temperature setting range is 70~90°C, the die aperture is 3mm, the temperature is set at 80°C, and the screw speed is set It is 140r / min.

[0045] 4) Send the potash fertilizer powder into the screw extruder with various parameters set, after feeding, compressing and homogenizing, finally extruding through the die, and cutting into pellets.

[0046] 5) Cool and sieve the potassium fertilizer granules to obtain qualified potassium fertilizer granules: particle size 2~4mm, nutrient content 53.4, particle strength 54N.

Embodiment 3

[0048] 1) Weigh 92kg of potassium sulfate powder, 4kg of paraffin wax, and 4kg of polyethylene glycol and send them into a vibration mill for micronization and surface treatment.

[0049] 2) During the operation of the vibration mill, the temperature of the control system is 70°C, and the processing time is 40 minutes.

[0050] 3) Choose a screw extruder with a screw diameter of 70mm and a length-to-diameter ratio of 28:1. The barrel temperature setting range is 70~900°C, the die aperture is 4mm, the temperature is set at 80°C, and the screw speed is set It is 180r / min.

[0051] 4) Send the potash fertilizer powder into the screw extruder with various parameters set, after feeding, compressing and homogenizing, finally extruding through the die, and cutting into pellets.

[0052] 5) Cool and sieve the potassium fertilizer granules to obtain qualified potassium fertilizer granules: particle size 3~5mm, nutrient content 49.7, particle strength 53N.

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Abstract

The invention relates to a potash fertilizer granulation method and granules thereof. The method is characterized by comprising the following steps: micronization is carried out on a potash fertilizer, and during the micronization process, a low molecular weight organic matter is used to process the surface of the potash fertilizer so as to endow the potash fertilizer with thermoplastic machinability; then, the potash fertilizer is sent into a screw extruder pelletizer to undergo compression, mixing and compaction extrusion; and finally, grain-sized dicing, cooling and screening are carried out successively, so as to obtain potash fertilizer granules. According to the method, the potash fertilizer accounts for more than 90% of the total weight of the granulation material and the concentration is high; the potash fertilizer granules are spheroidal; grain size is 2-5 mm; and average crushing strength is 40-60 N. The method has advantages of simple technology, low investment, continuous production, high yield and low energy consumption. The potash fertilizer granules obtained are regular, contain uniformly-dispersed nutrients, has high strength and has market application value.

Description

technical field [0001] The invention relates to a potash fertilizer granulation method, more specifically, the invention relates to a potash fertilizer screw extrusion granulation method and granules thereof, belonging to the field of potash fertilizer granulation. Background technique [0002] Potassium is one of the indispensable elements for plants. During the growth and development of plants, potassium is directly involved in photosynthesis, transport of assimilated products, and protein synthesis. Potash fertilizer is one of the three major types of chemical fertilizers. The annual consumption of potash fertilizer in my country exceeds 4.7 million tons. Ordinary potassium fertilizers such as potassium chloride, potassium sulfate, and plant ash are all in powder form, and they will agglomerate after being stored for a long time due to moisture absorption. [0003] With the continuous development of science and technology and the continuous innovation of agricultural tec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00
CPCC05D1/02C05G3/00C05G5/12
Inventor 陈庆廖宾
Owner GUANGDONG MIGAO CHEM
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