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Preparation method for potash fertilizer particles

A potash fertilizer and granule technology, applied in the directions of potash fertilizer, inorganic fertilizer, fertilization device, etc., can solve the problems of low production efficiency of the roller extrusion method, high cost of melt spray granulation, difficult drying operation, etc., and achieves low production cost, The effect of high degree of equipment automation and strong process adaptability

Active Publication Date: 2015-01-28
山东亿田生物肥料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The present invention aims at the disadvantages of the above-mentioned patents, such as difficult dry operation of agglomeration granulation process, poor appearance, uneven granules, low strength, low production efficiency and small output of roller extrusion method, high cost and high energy consumption of melt spray granulation, etc. , provide a kind of preparation method of potassium fertilizer granule

Method used

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  • Preparation method for potash fertilizer particles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] 1) Weigh 93kg of potassium chloride, 5kg of sodium lignosulfonate, and 2kg of water into a high mixer and mix for 15 minutes to obtain a mixed material.

[0038] 2) Send the mixed material into the two-stage mixing and extruding unit. The first-stage twin-screw kneading machine: the screw diameter is 35mm, the length-diameter ratio is 24:1, the compression section is equipped with 2 sets of compression screw blocks, and the melting section There are 2 sets of forward kneading blocks; the second-stage single-screw extruder: the diameter of the screw is 100mm, the ratio of length to diameter is 7:1, and the diameter of the die is 3mm.

[0039] 3) The temperature of each section of the barrel of the first-stage twin-screw kneader is set as follows: the feeding section is 100°C, the compression section is 110°C, the melting section is 120°C, the exhaust section is 120°C, and the screw speed is set to 500 r / min; The temperature of each section of the barrel of the second-sta...

Embodiment 2

[0042] 1) Weigh 94kg of potassium sulfate, 4kg of sodium laurate sulfate, and 2kg of water into a high-mixer for 20 minutes to obtain a mixed material.

[0043] 2) Send the mixed material into the two-stage mixing and extruding unit. The first-stage twin-screw kneader: the screw diameter is 45mm, the length-to-diameter ratio is 26:1, and the compression section is equipped with 2 sets of compression screw blocks, and the melting section There are 2 sets of forward kneading blocks; the second-stage single-screw extruder: the diameter of the screw is 120mm, the ratio of length to diameter is 10:1, and the diameter of the die is 4mm.

[0044] 3) The temperature of each section of the barrel of the first-stage twin-screw kneader is set as follows: the feeding section is 110°C, the compression section is 120°C, the melting section is 130°C, the exhaust section is 120°C, and the screw speed is set to 400 r / min; The temperature of each section of the barrel of the second-stage single...

Embodiment 3

[0047] 1) Weigh 96kg of potassium chloride, 3kg of fatty alcohol polyoxyethylene ether sodium sulfate, and 1kg of water into a high-mixer for 20 minutes to obtain a mixed material.

[0048] 2) Send the mixed material into the two-stage mixing and extruding unit. The first-stage twin-screw kneading machine: the screw diameter is 55mm, the length-to-diameter ratio is 28:1, and the compression section is equipped with 2 sets of compression screw blocks, and the melting section There are 3 sets of forward kneading blocks; the second-stage single-screw extruder: the diameter of the screw is 150mm, the ratio of length to diameter is 7:1, and the diameter of the die is 3mm.

[0049] 3) The temperature of each section of the barrel of the first-stage twin-screw kneader is set as follows: the feeding section is 120°C, the compression section is 130°C, the melting section is 140°C, the exhaust section is 120°C, and the screw speed is set to 300 r / min; The temperature of each section of ...

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Abstract

The invention relates to a preparation method for potash fertilizer particles. The preparation method is characterized in that the potash fertilizer particles are pelletized by a two-stage mixing extruder, potash fertilizer powder and additives are rapidly refined, scattered and mixed due to the strong shear force of the high rotation speed screw of a first-stage twin screw mixing mill, and then enter a second-stage single screw extruder through exhaust, the output end can conduct high pressure stable extrusion at a low rotation speed, and finally, pelleting is carried out by a die surface pelletizer to obtain the potash fertilizer particles. The potash fertilizer particles have high nutrient concentration, are regular in shape and uniform in diameter, and have high strength and good slow release performance. The preparation method is simple to operate, has strong technological adaptability, consumes little energy, has high granulation rate and high yield, and has market application value.

Description

technical field [0001] The invention relates to a method for preparing potash fertilizer granules, more specifically, the invention relates to a method for granulating potash fertilizer by using a double-stage mixing and extruding unit, which belongs to the field of potash fertilizer granulation. Background technique [0002] Potassium fertilizer is one of the three major chemical fertilizer varieties. Potassium is one of the indispensable elements of plants. During the growth and development of plants, potassium directly participates in photosynthesis, assimilation product transportation, protein synthesis and other processes. my country's annual potassium fertilizer consumption The volume exceeds 5 million tons. Ordinary potassium fertilizers such as potassium chloride, potassium sulfate, potassium nitrate, and plant ash are all in powder form, and they will agglomerate after being stored for a long time due to moisture absorption. [0003] Poor physical properties of powd...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00C05D1/02
CPCC05D1/02C05G5/12C05G3/00
Inventor 陈庆廖宾
Owner 山东亿田生物肥料科技有限公司
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