Inorganic composition synergistic compound fertilizer and preparation method thereof

Abstract

The invention discloses an inorganic composition synergistic compound fertilizer and a preparation method thereof. The inorganic composition synergistic compound fertilizer comprises the following raw materials in parts by weight: 30-50 parts of an inorganic material and 40-60 parts of a compound nutrient element material, the inorganic material is natural zeolite; the inorganic material is an inorganic composition, and the inorganic composition comprises the following components in parts by weight: 7-10 parts of slate tailings and 10-30 parts of natural zeolite. The invention belongs to the technical field of compound fertilizer preparation, and aims to solve the problems of low utilization rate, influence on soil health and ecological environment, short fertilizer efficiency and lack of trace elements of the fertilizer in the prior art. The slate tailings and the natural zeolite are utilized to provide trace elements such as silicon, calcium, magnesium, iron and manganese required by crop growth, so that the comprehensive fertilizer efficiency of the compound fertilizer is improved, and the problems of low utilization rate, influence on soil health and ecological environment, short fertilizer efficiency and lack of trace elements of the fertilizer are solved.

Description

Technical Field

[0001] The present application belongs to the technical field of compound fertilizer preparation, and specifically relates to an inorganic composition synergistic compound fertilizer and a preparation method thereof. Background Art

[0002] Compound fertilizers integrate multiple nutrients, such as nitrogen, phosphorus, and potassium, to meet crop growth needs and significantly improve yield and quality. Their scientific proportions and precise application reduce nutrient loss, improve fertilizer utilization, and reduce environmental pressure. The organic matter and trace elements in compound fertilizers can improve soil structure, enhance soil fertility, and increase water and fertilizer retention. Their diverse formulas can be customized for different crops and soil conditions, promoting crop resistance and reducing physiological diseases. The efficient application of compound fertilizers saves time and costs, promoting greener and more sustainable agriculture. However, existing conventional compound fertilizer products have several drawbacks in agricultural applications, including the following: Soil adsorption: The phosphorus and potassium in conventional compound fertilizers are easily adsorbed by the soil, reducing their utilization. This adsorption limits crop absorption of phosphorus and potassium, significantly reducing the fertilizer's effectiveness. It can also cause soil compaction and other problems.

[0003] Water loss problem: Since the nitrogen and potassium elements in compound fertilizers are highly water-soluble, excessive application or improper fertilization methods may cause nitrogen and potassium ions to be lost with rainwater or irrigation water, resulting in resource waste and environmental pollution.

[0004] Low utilization rate: The application of conventional compound fertilizers is often accompanied by low fertilizer utilization rates. Although crops absorb nitrogen, phosphorus, and potassium quickly, the proportion of nitrogen, phosphorus, and potassium actually utilized by crops is low due to the aforementioned soil adsorption and water loss issues.

[0005] Short fertilizer effect: Due to the easy loss and easy adsorption and solidification of compound fertilizers by the soil, their lasting effect in the soil is short, and frequent application is required to maintain the potassium level required for crop growth, which not only increases costs but also increases the impact on the environment.

[0006] Environmental pollution: After applying conventional compound fertilizers, nitrogen and potassium ions may be lost with water into groundwater or rivers, affecting water quality and causing environmental pollution. Furthermore, long-term use may lead to soil acidification, further affecting soil health and the ecological environment.

[0007] Lack of trace elements: Ordinary compound fertilizers mainly provide nitrogen, phosphorus and potassium, and cannot provide the trace elements required for crop growth, such as silicon, calcium, magnesium, iron, manganese, etc., which are also crucial for the healthy growth of crops.

[0008] Soil salinization problem: Long-term excessive use of ordinary compound fertilizers or improper use of compound fertilizers may aggravate soil salt accumulation, cause secondary salinization disorders, and affect crop growth.

[0009] In summary, the use of conventional compound fertilizers presents a series of problems that not only affect crop growth and yield but can also have adverse environmental impacts. Therefore, it is particularly important to develop new, high-efficiency compound fertilizers that can improve fertilizer utilization, reduce environmental pollution, and provide the trace elements required by crops. Summary of the Invention

[0010] The present application provides an inorganic composition synergistic compound fertilizer and a preparation method thereof, aiming to solve the problems of low fertilizer utilization, impact on soil health and ecological environment, short fertilizer effect and lack of trace elements in the prior art.

[0011] In a first aspect, an inorganic composition synergistic compound fertilizer comprises the following raw materials in parts by weight: 30-50 parts by weight of inorganic materials and 40-60 parts by weight of compound nutrient element materials.

[0012] Furthermore, the inorganic material is natural zeolite.

[0013] Furthermore, the inorganic material is an inorganic composition, which includes slate tailings and natural zeolite. The weight of the slate tailings is 7-10 parts, and the weight of the natural zeolite is 10-30 parts.

[0014] Furthermore, the compound nutrient element material is a mixture of urea, monoammonium phosphate, superphosphate, potassium chloride or potassium sulfate and ammonium chloride.

[0015] In a second aspect, a method for preparing an inorganic composition synergistic compound fertilizer comprises the following steps: S1: Weigh each component according to weight; S2: Processing bulk inorganic materials into -200 mesh powder; S3: Evenly mix the powder obtained in S2 with the compound nutrient element material to obtain a mixed dry material; S4: uniformly mix the mixed dry material obtained in S3 with water to obtain a mixed wet material; wherein the mass ratio of the mixed dry material to water is 8-10:1, S5: performing a granulation process on the mixed wet material to obtain nearly spherical particles with a particle size of 2-4.75 mm.

[0016] Furthermore, the granulation process in S5 is extrusion granulation or high tower granulation.

[0017] Furthermore, the total nutrient mass fraction of nitrogen, phosphorus and potassium of the nearly spherical granular synergistic compound fertilizer is ≥35%, and the moisture content is ≤1%.

[0018] Compared with the prior art, this application has at least the following beneficial effects: This application is based on further analysis and research on existing technical problems. By utilizing slate tailings and natural zeolites, trace elements such as silicon, calcium, magnesium, iron, and manganese required for crop growth are provided, and the synergistic effect of multiple elements is exerted to improve the comprehensive fertilizer efficiency of compound fertilizers; the adsorption and ion exchange properties of inorganic materials are utilized to slowly release compound fertilizers and prolong the fertilizer effect; the micro-particle effect of inorganic material combinations is utilized to improve the soil's aggregate structure, improve the soil's air permeability, water permeability, and the growth characteristics of the root system. DETAILED DESCRIPTION

[0019] The present invention will be further described below with reference to specific embodiments, and the advantages and features of the present invention will become clearer as the description proceeds. However, these embodiments are merely exemplary and do not constitute any limitation to the scope of the present invention. It should be understood by those skilled in the art that the details and forms of the technical solutions of the present invention may be modified or replaced without departing from the spirit and scope of the present invention, and such modifications and replacements fall within the scope of protection of the present invention.

[0020] This application provides an inorganic composite synergistic compound fertilizer comprising the following components, calculated by weight: 40% slate tailings and natural zeolite, and 60% mixed nutrient material. The ratio of slate tailings to natural zeolite can be 7-10 slate tailings: 10-30 slate tailings; preferably, 8-10 slate tailings: 22-30 natural zeolite.

[0021] Among the various forms of inorganic composite synergistic compound fertilizers, the granulated inorganic composite synergistic compound fertilizers have the best release effect, especially the nearly spherical inorganic composite synergistic compound fertilizer particles, especially the nearly spherical inorganic composite synergistic compound fertilizer particles with a particle size of about 2-4.0 mm.

[0022] Fertilizer granules were tested in accordance with the national standard for blended fertilizers GB / T 21633-2020. The technical indicators of fertilizer granules are shown in Table 1:

[0023] In the above-mentioned inorganic composite synergistic compound fertilizer, the dissolution and release rate of the compound nutrient element material is improved by composite granulation of slate tailings, natural zeolite and compound nutrient element material, and the dissolution rate and soil adsorption loss, water leaching loss and oxidation loss of the compound nutrient element material are slowed down; By adding slate tailings and natural zeolite, the silicon, calcium, magnesium, iron, manganese and other trace elements required for crop growth are provided, and the comprehensive fertilizer efficiency of the compound nutrient element material can be improved through the synergistic effect of multiple elements: By adding slate tailings and natural zeolite, and utilizing their adsorption and ion exchange properties, the compound nutrient elements are slowly released, thus prolonging the fertilizer effect. By adding slate tailings and natural zeolite and utilizing their micro-particle effect, the soil aggregate structure is improved, and the soil's air permeability, water permeability and root growth characteristics are enhanced.

[0024] The present application provides a method for preparing an inorganic composition synergistic compound fertilizer, the method comprising the following steps: S1: Weigh each component according to weight.

[0025] S2: Processing bulk inorganic materials into -200 mesh powders significantly increases the specific surface area of ​​the material. This increased specific surface area facilitates subsequent mixing with other materials, allowing for a more even distribution of nutrients and improving the uniformity of nutrients within the fertilizer.

[0026] S3: The powder obtained in S2 is evenly mixed with the compound nutrient material to obtain a mixed dry material. The components of the compound nutrient material and the inorganic material act synergistically to improve the fertilizer's efficiency. This promotes the absorption and utilization of key nutrients by crops, and thorough mixing allows for better synergistic effects.

[0027] S4: Evenly mixing the mixed dry material obtained in S3 with water to obtain a mixed wet material; wherein the mass ratio of the mixed dry material to water is 8-10:1. Water acts as a binder during the granulation process, allowing the mixed dry material particles to adhere to each other, forming strong granules. This ensures that the granules are not easily broken during the granulation process and prevents the particles from sticking or clumping due to excessive moisture.

[0028] S5: Granulating the mixed wet material to obtain nearly spherical granules with a particle size of 2-4.75 mm. The nearly spherical particle shape and a specific particle size help control the rate of nutrient release. Compared with powdered fertilizer, granular fertilizer dissolves in the soil and releases nutrients more slowly, providing a more sustained nutrient supply to crops, reducing nutrient leaching and volatilization, and improving fertilizer utilization.

[0029] The granulation process is extrusion granulation or tower granulation. The total nitrogen, phosphorus and potassium nutrient mass fraction of the nearly spherical granules of the synergistic compound fertilizer is ≥35%, and the moisture content is ≤1%.

[0030] In the above-mentioned method for preparing a synergistic compound fertilizer using an inorganic composition, a granulation process produces nearly spherical particles, which helps control the rate of nutrient release, further enabling a slow release of the compound nutrient materials and prolonging the fertilizer's effectiveness. Furthermore, the overall granulation process is improved by utilizing slate tailings and natural zeolite to provide trace elements such as silicon, calcium, magnesium, iron, and manganese required for crop growth, leveraging the synergistic effects of these elements to enhance the compound fertilizer's overall efficiency. The inorganic material combination utilizes its microparticle effect to improve the soil's aggregate structure, enhancing its air and water permeability, as well as its root growth properties.

[0031] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

Claims

1. An inorganic composition synergistic compound fertilizer, characterized in that: The invention comprises the following raw materials in parts by weight: 30-50 parts of inorganic materials and 40-60 parts of compound nutrient element materials.

2. The inorganic composition synergistic compound fertilizer according to claim 1, characterized in that: The inorganic material is natural zeolite.

3. The inorganic composition synergistic compound fertilizer according to claim 1, characterized in that: The inorganic material is an inorganic composition, which includes slate tailings and natural zeolite. The weight of the slate tailings is 7-10 parts, and the weight of the natural zeolite is 10-30 parts.

4. An inorganic composition synergistic compound fertilizer according to claim 2 or 3, characterized in that: The compound nutrient element material is a mixture of urea, monoammonium phosphate, superphosphate, potassium chloride or potassium sulfate and ammonium chloride.

5. A method for preparing an inorganic composition synergistic compound fertilizer, characterized in that: The method comprises the following steps: S1: Weigh each component according to weight; S2: Processing bulk inorganic materials into -200 mesh powder; S3: Evenly mix the powder obtained in S2 with the compound nutrient element material to obtain a mixed dry material; S4: uniformly mix the mixed dry material obtained in S3 with water to obtain a mixed wet material; wherein the mass ratio of the mixed dry material to water is 8-10:1, S5: performing a granulation process on the mixed wet material to obtain nearly spherical particles with a particle size of 2-4.75 mm.

6. The method for preparing an inorganic composition synergistic compound fertilizer according to claim 5, characterized in that: The granulation process in S5 is extrusion granulation or high tower granulation.

7. The method for preparing an inorganic composition synergistic compound fertilizer according to claim 5, characterized in that: The total nutrient mass fraction of nitrogen, phosphorus and potassium in the nearly spherical granular synergistic compound fertilizer is ≥35%, and the moisture content is ≤1%.

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