A function-enhanced granular composite soil conditioner

Abstract

The invention discloses a function enhanced granular composite soil conditioner. A product is prepared by taking magnesium oxide and ardealite as main raw materials, adding medium elements such as magnesium, sulfur and calcium which are necessary to growth of crops, trace elements such as zinc, boron, manganese and molybdenum and organic matter nutritional components such as amino acid and humic acid, uniformly mixing all the raw materials, and carrying out granulation and drying. According to the function enhanced granular composite soil conditioner, the utilization rate of ardealite is effectively increased, and the economical benefit is outstanding. Magnesia is used for neutralizing the acidity of the ardealite, so as to eliminate the use limitation and the harm of the acidity to the crops and the soil, the granulation performance of the ardealite is obviously improved, and the granulation balling rate and the compressive strength of particles are improved. Furthermore, magnesium which serves as an important medium element is also provided, so that four effects are achieved through one operation. The final product has the effects that nutrients are complete and loosening and conditioning of the soil are realized, and is further favorable for breeding of organisms like earthworms and microorganisms; the function enhanced granular composite soil conditioner can be directly applied, and is convenient, flexible, clean and environment-friendly; the production process is simple and convenient, low in cost, and favorable for large-scale production and mechanical large-area application.

Description

technical field [0001] The invention belongs to the technical field of phosphogypsum utilization and soil conditioner production, and specifically relates to a function-enhanced granule that is rich in medium and trace elements, amino acids, humic acid and other organic nutrients prepared from bitter soil and phosphogypsum as main raw materials. Compound soil conditioner. Background technique [0002] my country ranks first in the world in terms of chemical fertilizer application per unit planting area. Long-term and large-scale application of chemical fertilizers will lead to changes in soil pH and physical and chemical properties, soil compaction, decreased permeability, reduced absorption of nutrients by crops, and reduced production. The use of soil conditioners can alleviate and improve soil properties to a certain extent, and under the same conditions, increase production and income to a certain extent. [0003] At present, common agricultural soil conditioners are m...

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Problems solved by technology

[0006] Phosphogypsum itself contains a lot of sulfur and calcium, and has loose properties similar to fine sand. It is an inorganic soil loosening improver containing sulfur and calcium and has certain effects. Acid, acidic (pH is generally 2 to 4), generally only suitable for alkaline soils, and it is a fine crystalline powder, which is inconvenient for transportation, storage and use, and the application cost is high. It is very easy to generate more dust, causing dust pollution and health hazards

And there is the problem that powder products cannot be mechanized and applied in large areas

[0007] The loose nature of phosphogypsum determines that it is difficult to granulate, the compressive strength of the granules is very low, and it is easy to break and pulverize. When it is specially granulated, more costs will be added, which is very uneconomical

Due to the lack of better utilization technologies and products, most of the phosphogypsum by-products in the phosphorus chemical industry are piled up in large quantities in wet slag discharge dams or dry slag dumps, posing safety risks and other problems

[0008] At present, in the existing technologies and methods, there is no good way to overcome and solve the above-mentioned problems.

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