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Potassium fertilizer granules and granulating method thereof

A potash fertilizer and granule technology, applied in potash fertilizers, inorganic fertilizers, fertilization devices and other directions, can solve the problems of difficult operation of agglomeration granulation process, high cost of melt spray granulation, irregular potash fertilizer granules, etc., and achieve excellent biodegradation performance, Low cost and good liquidity

Inactive Publication Date: 2015-02-18
青海盐湖元通钾肥有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The present invention aims at the disadvantages of the above-mentioned patents, such as irregular potassium fertilizer particles produced by roller extrusion, low output, high cost of melt spray granulation, high energy consumption, difficult operation of agglomeration granulation, poor appearance, and low particle strength. , providing a kind of potash fertilizer granule and its granulation method

Method used

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  • Potassium fertilizer granules and granulating method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] 1) Weigh 85kg of potassium chloride powder, 14kg of thermoplastic starch, 0.4kg of stearic acid, and 0.6kg of tributyl phosphate, and mix the materials evenly.

[0044] 2) Use a twin-screw extruder with a screw diameter of 65mm, a length-to-diameter ratio of 20:1, and two sets of compression screw blocks in the compression section.

[0045] 3) The temperature of each zone of the twin-screw extruder is set as follows: feed section 90°C, conveying section 120°C, mixing section 130°C, compression section 120°C, die 100°C, screw speed set at 150r / min.

[0046] 4) Send the mixed material in step 1) into the twin-screw extruder with each parameter set, after feeding, conveying, mixing, compressing, and finally extruding through the die, and cutting into pellets.

[0047] 5) Cool and sieve the potash fertilizer granules to obtain qualified potash fertilizer granules: the particle size is 3±1mm, the nutrient content is 47, and the particle strength is 59N.

[0048]

Embodiment 2

[0050] 1) Weigh 86 kg of potassium sulfate powder, 12 kg of thermoplastic starch, 1 kg of stearic acid, and 1 kg of isopropyl trioleoyl titanate, and mix the materials evenly.

[0051] 2) Choose a twin-screw extruder with a screw diameter of 85mm, a length-to-diameter ratio of 25:1, and two sets of compression screw blocks in the compression section.

[0052] 3) The temperature of each zone of the twin-screw extruder is set as follows: the feed section is 100°C, the conveying section is 120°C, the mixing section is 130°C, the compression section is 120°C, the die is 100°C, and the screw speed is set to 200r / min.

[0053] 4) Send the mixed material in step 1) into the twin-screw extruder with each parameter set, after feeding, conveying, mixing, compressing, and finally extruding through the die, and cutting into pellets.

[0054] 5) Cool and sieve the potassium fertilizer granules to obtain qualified potassium fertilizer granules: particle size 3±1mm, nutrient content 45, part...

Embodiment 3

[0057] 1) Weigh 87kg of potassium chloride powder, 10kg of thermoplastic starch, 1kg of low molecular weight polyethylene, and 2kg of tributyl phosphate, and mix the materials evenly.

[0058] 2) Use a twin-screw extruder with a screw diameter of 105mm, a length-to-diameter ratio of 25:1, and two sets of compression screw blocks in the compression section.

[0059] 3) The temperature of each zone of the twin-screw extruder is set as follows: the feed section is 100°C, the conveying section is 120°C, the mixing section is 130°C, the compression section is 120°C, the die is 110°C, and the screw speed is set to 200r / min.

[0060] 4) Send the mixed material in step 1) into the twin-screw extruder with each parameter set, after feeding, conveying, mixing, compressing, and finally extruding through the die, and cutting into pellets.

[0061] 5) Cool and sieve the potash fertilizer granules to obtain qualified potash fertilizer granules: particle size 3±1mm, nutrient content 48, part...

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Abstract

The invention relates to potassium fertilizer granules and a granulating method thereof. The potassium fertilizer granules are characterized by comprising the following raw materials in percentage by weight: 85%-90% of potassium chloride or potassium sulfate powder, 7%-14% of thermoplastic starch, 0.4%-1.8% of a dispersant and 0.4%-1.8% of a surface treatment agent, wherein the total weight percent of the raw materials is 100%. According to the granulating method, the granulating operation of a potassium fertilizer is finished through a double-screw extruder, and the potassium fertilizer and the thermoplastic starch are uniformly dispersed in the double-screw extruder under the action of an assistant and are mixed, coupled, compressed, extruded and diced. The granulating method comprises the following concrete steps: a, grinding; b, dosing; c, blending; d, mixing; e, granulating; f, cooling; g, screening; h, packaging to obtain the qualified potassium fertilizer granules. The method is simple in process and low in cost, and can be used for continuous production; the obtained potassium fertilizer granules are regular, uniform in nutrition dispersion and high in intensity, and have market application values.

Description

technical field [0001] The invention relates to a potash fertilizer, more specifically, the invention relates to a potash fertilizer granule and a granulation method thereof, belonging to the field of granular slow-release potassium fertilizer. Background technique [0002] Potassium fertilizer is one of the three major types of chemical fertilizers, mainly potassium salts such as potassium chloride, potassium sulfate, and plant ash (potassium carbonate). These potassium salts are powder or small crystals, which are easily soluble in water. Potassium ions in. Potassium is one of the indispensable elements for plants. Potassium in plants generally accounts for 0.2%~4.1% of dry matter weight, second only to nitrogen. It can be seen that the amount of potassium fertilizer is large. According to statistics, the annual consumption of potassium fertilizer in my country is close to 5 million Ton. [0003] Ordinary potassium fertilizer is in powder form and is a quick-acting fertil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00
CPCC05D1/02C05G5/12C05G5/40
Inventor 陈庆廖宾
Owner 青海盐湖元通钾肥有限公司
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