Disintegratable round-granule sulfur magnesium fertilizer and preparation method thereof

Abstract

The invention belongs to the field of agricultural fertilizers, and relates to a disintegratable round-granule sulfur magnesium fertilizer. Powdery brucite and sulfur powder are used as main raw materials, and a magnesium sulfate heptahydrate solution is used as a binding agent. The disintegratable round-granule sulfur magnesium fertilizer is prepared by granulating the following components in parts by mass: mixture of 90-95 parts of powdery brucite and 5-10 parts of sulfur as the dry material, and magnesium sulfate heptahydrate solution as the binding agent. After drying the round granules, the water content is less than or equal to 3%, the strength is greater than or equal to 2Kg / cm<2>, and the disintegration rate is greater than or equal to 95%. The magnesium sulfate heptahydrate solution is used as the binding agent to enhance the granulation rate; the 60-120 mesh powdery brucite and sulfur powder are mixed as the dry material; and granulation, screening, drying, cooling and packaging are carried out to prepare the spherical granules with the granular size of 2-4mm. The invention has the advantages of low cost, high magnesium content and high disintegration speed. The product is spherical granules, has the advantages of favorable disintegratability, uniform granularity and high strength, and can be conveniently mixed with other nitrogen-phosphorus-potassium fertilizers.

Description

technical field [0001] The invention belongs to the field of agricultural fertilizers, in particular to sulfur and magnesium fertilizers. Background technique [0002] Magnesium is an important nutrient element needed by plants. Magnesium mainly exists in chlorophyll, phytochemicals and pectin, and plays an important role in photosynthesis. Magnesium ions are activators of various enzymes, which promote the conversion and metabolism of sugars in the body, and promote Synthesis of fat and protein. Applying magnesium to oil crops can increase their oil content, and magnesium can also promote the absorption of silicon by crops. Sulfur powder is an acidic compound, which not only plays an important role in plant nutrition, but also plays a very active role in pharmacology. It not only supplies nutrients to plants, but also promotes growth and development. It is used on flowers, trees, and fruit trees. Bacterial antiseptic, regulating acidity and alkalinity, promoting wound hea...

AI Technical Summary

Problems solved by technology

[0003] The traditional application of magnesium fertilizers is mainly based on brucite, light-burned magnesium, and magnesium sulfate. Because brucite is rich in raw materials and low in cost, it is widely used as a raw material for supplementing magnesium elements and magnesium-containing compound fertilizers for crops. The application of powdered magnesium fertilizers Inconvenient, not easy to spread evenly, and easy to pollute the environment. With the development of national soil testing formula fertilizer, BB fertilizer is used more and more, and the demand for round granular magnesium fertilizer is becoming more and more urgent

The existing granular magnesium fertilizer technology has disadvantages such as low magnesium content, poor disintegration efficiency, low strength, poor particle roundness, and complicated production.