Production method for manufacturing potassium magnesium sulfate granules and application of potassium magnesium sulfate granules

Abstract

The invention relates to a production method for manufacturing potassium magnesium sulfate granules and application of the potassium magnesium sulfate granules. The production method comprises the following steps: S1. charging: adopting standard-grade imported potassium magnesium sulfate; S2. proportioning and mixing: adding an ammonium sulfate solution and water, and performing stirring in a mixing and stirring plant for several minutes until the raw materials are uniformly mixed (when the raw materials become dark red and can be balled in the fist without dispersion); S3. granulation: adding the mixed raw materials into a plurality of double-roller extrusion granulators by a distributor, and performing mechanical extrusion granulation; and S4. screening: sending the granules into a drum screen, performing screening and size stabilization by the drum screen, storing the qualified product (the granular size reaches 2-4.75mm) in a finished product storage bin, and sending the screened fine powder back into the mixing and stirring plant. The potassium magnesium sulfate granules can be applied as a raw material in a blended fertilizer and a raw material in a water-soluble fertilizer. The potassium magnesium sulfate granules obtained by the production method have the advantages of high strength and high dissolution speed, and the granular size satisfies the requirements for mechanical application and application as the raw material in the blended fertilizer.

Description

technical field [0001] The invention belongs to the production and application of potassium-magnesium sulfate fertilizer, and particularly relates to a method for producing high-quality potassium-magnesium sulfate particles with imported standard-grade potassium-magnesium sulfate small particles and uses of the produced potassium-magnesium sulfate particles. Background technique [0002] Potassium-magnesium sulfate is a kind of compound potash fertilizer containing trace elements such as magnesium and sulfur, which is produced from salt lake brine or solid potassium-magnesium ore by physical extraction or direct removal of impurities. The chemical formula is: K2SO4.2MgSO4. Currently, it is mainly used as a fertilizer or in industrial applications. [0003] Potassium magnesium sulfate is divided into standard grade, granular grade and high-quality grade according to particle size. Standard grade is produced from natural ore, with fine particles, which can be used for direct ...

AI Technical Summary

Problems solved by technology

This granulation method reduces the nutrient content by 2% to 5%, and increases the manufacturing cost by 300 yuan / ton. At the same time, drying, cooling and other processes consume energy and cause pollution to the environment.

[0007] In view of the shortcomings of the above-mentioned existing granulation production methods, it is necessary to develop an innovative, low-cost, pollution-free, nutrient-invariant granulation method to fill the technological gap in potassium and magnesium sulfate granulation

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