A kind of potassium magnesium sulfate fertilizer and preparation method thereof

Abstract

The invention relates to a potassium magnesium sulfate fertilizer and a preparation method thereof. The potassium magnesium sulfate fertilizer is characterized in that it consists of potassium magnesium sulfate and magnesium oxide. The application can effectively increase the potassium magnesium sulfate fertilizer without affecting the content of potassium magnesium sulfate. particle hardness and prevent agglomeration.

Description

technical field [0001] The invention relates to a potassium magnesium sulfate fertilizer and a preparation method thereof. Background technique [0002] Natural potassium magnesium sulfate has poor viscosity and high water absorption rate. In order not to affect the content of potassium magnesium sulfate, the traditional preparation method of potassium magnesium sulfate granular fertilizer is to granulate by rolling extrusion, but its particle strength is low and easy to Pulverization and the problem of easy agglomeration in the storage process have brought troubles to the use and promotion of potassium magnesium sulfate. [0003] There are also roller granulation of natural potassium magnesium sulfate to prepare round granules. However, to make round granules, clay needs to be added. In order to achieve a higher one-time ball forming rate, the amount of clay added is usually more than 10%, which is serious. Reduced the content of S, K, Mg in the potassium magnesium sulfate...

AI Technical Summary

Problems solved by technology

[0002] Natural potassium magnesium sulfate has poor viscosity and high water absorption rate. In order not to affect the content of potassium magnesium sulfate, the traditional preparation method of potassium magnesium sulfate granular fertilizer is to granulate by rolling extrusion, but its particle strength is low and easy to Pulverization and the problem of easy agglomeration during storage have brought troubles to the use and promotion of potassium magnesium sulfate

[0003] There are also roller granulation of natural potassium magnesium sulfate to prepare round granules. However, to make round granules, clay needs to be added. In order to achieve a higher one-time ball forming rate, the amount of clay added is usually more than 10%, which is serious. The content of S, K, and Mg in potassium magnesium sulfate is reduced. If you want to achieve the effect of extruded granulated potassium magnesium sulfate, you need to add more amount when using it, which brings troubles to users.

At the same time, due to the low content, there are also limitations when it is compatible with other fertilizers. It can only be used with formulas with low S, K, and Mg contents, which also causes inconvenient use and difficulty in popularization.

[0004] There are also manufacturers who try to replace clay with polyvinyl alcohol with higher viscosity. However, when the concentration of polyvinyl alcohol used exceeds 4%, it will be affected by potassium and magnesium sulfate. If the concentration of polyvinyl alcohol is lower than 3%, the viscosity will be too low, the ball forming rate will be low, the output will be extremely low, and it will not be suitable for production.