Spherical potassium chloride particle and preparation method thereof

Abstract

The invention discloses a spherical potassium chloride particle and a preparation method thereof, which changes the traditional potassium chloride particle preparation method and changes irregular particles into spherical materials with smooth surface and high rigidity. The spherical potassium chloride particle takes a spherical particle with smooth surface which is prepared from potassium chloride raw materials as a base body; the diameter of the base body is 2.5mm-5.5mm; and according to the weight percent, the content of water in the base body is 0.1-2%. The method comprises the following steps: (1) raw material smashing and grinding; (2) raw material molding; (3) raw material curing; (4) raw material drying; and (5) classification screening and packaging. The invention has reasonable and concise process and high yield; when the production capacity of each production line is calculated to be about 6-8 tons, the yield of the method is 9-10 times of that of the extruding molding method, thereby improving the production efficiency of an enterprise and the accuracy of BB fertilizer production proportion, unifying the appearances of three fertilizers in the BB fertilizer, and lowering the production cost and the possibility of generating dust during production and application; and compared with the irregular particles, the spherical potassium chloride particle is more suitable for mechanical application, has good sustained release, enables crops to absorb nutrient more evenly, and is more beneficial for the growth of the crops.

Description

Technical field: [0001] The invention relates to a fertilizer granule and a manufacturing method thereof, in particular to a potassium chloride fertilizer granule used as a crop fertilizer and a manufacturing method thereof, belonging to the technical field of fertilizers. Background technique: [0002] Agricultural potassium chloride is a commonly used potassium fertilizer, which is mostly used for field crops. Potassium chloride is a powdery chemical fertilizer with a particle size of 70 mesh. In principle, it is not suitable for direct application. It is mostly used as a compound fertilizer after being made into granules and composed of nitrogen fertilizer and phosphate fertilizer. Now potassium chloride is made of powdery powder. The method of producing granules is generally more common in the method of extruding into flakes and then crushing. Use the pressure of 7-9Mpa to go through the extruder, extrude into flakes and then crush it by the grinder. Choose 2-6mm The le...

AI Technical Summary

Problems solved by technology

Potassium chloride is a powdery chemical fertilizer with a particle size of 70 mesh. In principle, it is not suitable for direct application. It is mostly used as a compound fertilizer after being made into granules and composed of nitrogen fertilizer and phosphate fertilizer. Now potassium chloride is made of powdery powder. The method of producing granules is generally more common in the method of extruding into flakes and then crushing. Use the pressure of 7-9Mpa to go through the extruder, extrude into flakes and then crush it by the grinder. Choose 2-6mm The left and right irregular particles are mixed with nitrogen and phosphorus fertilizers; the output is extremely low, taking the 360-type extrusion granulator as an example, the general production capacity is 0.6-0.8 tons per hour, and the granulation rate is only 50%-60%. Moreover, the particles formed after extrusion and crushing are irregular in shape, and the slow-release effect is poor, which is not conducive to the uniform absorption of crops, and the fertilizer effect time is short

[0003] Moreover, the traditional potash fertilizer processing technology is to squeeze potassium chloride powder potassium into irregular particles, but this kind of potash fertilizer pellet production process has many disadvantages, such as irregular large particles with angular appearance, during storage and transportation, It is easy to produce powder, so that the qualified products from the factory will eventually reach the user's hands and become unqualified products

In the process of feeding or mixing materials, it is easy to produce powder, and the deposited powder will hinder the normal operation of the equipment

There are irregular particles with poor quality. Due to the low hardness, a large amount of powder will be generated to block the equipment, resulting in the parking of agricultural machinery or production equipment for repairs. Since the irregular particles are easy to jam, it is not suitable for mechanical application; it is used for BB fertilizer Easy to produce breakage and powder during production and application

And because potassium chloride powder potassium is a kind of mineral that is not easy to form into balls, potassium chloride powder potassium is extruded into irregular particles by the potassium fertilizer production enterprises in various countries, which exist in BB fertilizer, but nitrogen fertilizer and phosphorus fertilizer in BB fertilizer are both It exists in the form of round grains, and its appearance is inconsistent with that of phosphorus and nitrogen fertilizers. Due to the different forms of nitrogen, phosphorus, and potassium, it leads to different material flow rates and uneven production ratios.

When BB fertilizer is applied, the phenomenon of uneven fertilizer effect occurs, which leads to many problems such as unsightly finished BB fertilizer

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