A high-temperature fission activated silicon-calcium-potassium-magnesium-boron-zinc complete nutrient fertilizer without additives and its preparation method

Abstract

This invention discloses an additive-free, high-temperature fission activated silicon-calcium-potassium-magnesium-boron-zinc complete nutrient fertilizer and its preparation method, belonging to the field of mineral fertilizer preparation technology. This invention uses potassium feldspar, dolomite, limestone, and natural gypsum as basic raw materials. After crushing and mixing, the raw materials undergo additive-free high-temperature calcination fission at 1200-1300℃. After calcination, the materials are rapidly cooled to below 60℃, and then borax and zinc sulfate monohydrate are added and mixed evenly to obtain the finished product. This invention eliminates the need for chemical additives such as fluxes and combustion aids, effectively reducing production costs. High-temperature calcination allows for full fission of the potassium feldspar lattice, resulting in an effective potassium dissolution rate of ≥90%. The addition of gypsum supplements sulfur, and combined with trace elements such as boron and zinc, forms a complete nutrient formula containing silicon, calcium, potassium, magnesium, sulfur, boron, and zinc. This formula is environmentally friendly to paddy fields and is particularly suitable for rice cultivation. Nutrients are not easily lost and are released stably under flooded conditions. It also meets the nutritional needs of field crops such as wheat and corn throughout their entire growth period, achieving a yield increase of 15-25%. It improves soil compaction, enhances crop resistance to lodging and disease, and features a simple process, low cost, and significant effects, resulting in extremely high economic and ecological benefits.

Description

Technical Field

[0001] This invention relates to the field of mineral fertilizer preparation technology, specifically to a non-additive high-temperature fission activated silicon-calcium-potassium-magnesium-boron-zinc complete nutrient fertilizer and its preparation method, which is particularly suitable for water-friendly rice paddy cultivation. Background Technology

[0002] Silicon-calcium-potassium-magnesium fertilizer, as a micronutrient fertilizer, is widely used in the cultivation of field crops such as wheat and corn. It can supplement the elements such as silicon, calcium, potassium, and magnesium required for crop growth, improve soil structure, and enhance crop yield and quality. However, existing silicon-calcium-potassium-magnesium fertilizer production processes have several shortcomings: First, most processes require the addition of fluxes such as borax and sodium sulfate, increasing the cost of raw material procurement and mixing processes, and these additives easily introduce impurities. Second, in the low-temperature calcination process, potassium feldspar lattice fission is insufficient, resulting in low release rates of effective potassium, silicon, and other nutrients, leading to poor fertilizer efficiency. Third, traditional formulas only focus on basic elements such as silicon, calcium, potassium, and magnesium, lacking key micronutrients such as sulfur, boron, and zinc, failing to meet the complete nutritional needs of crops and limiting yield increases. Fourth, some high-temperature calcination processes have low thermal efficiency, high energy costs, and are prone to equipment wear and tear, hindering large-scale production. Furthermore, existing fertilizers are prone to nutrient loss under flooded paddy field conditions, making them unsuitable for rice cultivation and insufficiently environmentally friendly.

[0003] To address the aforementioned industry pain points, this invention provides an additive-free, high-temperature fission activated silicon-calcium-potassium-magnesium-boron-zinc complete nutrient fertilizer and its preparation method, achieving the technical goals of low cost, high activity, complete nutrition, and high yield increase, especially improving its environmental friendliness to paddy fields and filling related technological gaps. Summary of the Invention

[0004] (a) Purpose of the invention To overcome the shortcomings of existing silicon-calcium-potassium-magnesium fertilizer production processes, such as high additive costs, low nutrient release rates, single formulas, limited yield-increasing effects, and insufficient water environment friendliness, this paper proposes a low-cost, additive-free, fully nutritious, highly effective, and environmentally friendly silicon-calcium-potassium-magnesium-boron-zinc fertilizer and its preparation method. This fertilizer is suitable for the nutritional needs of field crops such as rice, wheat, and corn throughout their entire growth period, thereby improving crop yield and soil structure.

[0005] (II) Technical Solution 1. A high-temperature fission activated silicon-calcium-potassium-magnesium-boron-zinc complete nutrient fertilizer without additives, characterized in that the fertilizer raw materials, by weight percentage, include the following components: potassium feldspar 40-45%, dolomite 25-30%, limestone 15-20%, natural gypsum 8-12%; after calcination, the following auxiliary materials are added: borax (sodium borate decahydrate) 0.1-0.2%, zinc sulfate monohydrate 0.1-0.2%.

[0006] 2. The preparation method of the above fertilizer includes the following steps: (1) Raw material pretreatment: Potassium feldspar, dolomite, limestone and natural gypsum are crushed separately and passed through a 200-320 mesh sieve to obtain fine powder; (2) Mixing and batching: Each fine powder is added to the mixing equipment according to the weight percentage and stirred evenly to obtain mixed raw materials; (3) High temperature calcination: The mixed raw materials are sent to the calcination furnace and the calcination temperature is controlled at 1200-1300℃ for 2-4 hours. No fluxing agents, combustion aids or other chemical additives are added throughout the process; (4) Rapid cooling: After calcination, the material is rapidly cooled to below 60℃ to avoid recrystallization of nutrients and maintain high activity; (5) Trace element addition: Borax and zinc sulfate monohydrate are added to the cooled material and stirred evenly to obtain a high temperature fission activated silicon, calcium, potassium, magnesium, boron and zinc complete nutrient fertilizer without additives.

[0007] (III) Raw Material Limitation 1. Potassium feldspar: A major source of silicon and potassium, containing ≥10% potassium, eliminating the need for additional iron supplementation as natural iron can meet crop requirements; 2. Dolomite: Provides magnesium and calcium, ensuring crop cell wall development and enhancing lodging resistance; 3. Limestone: Supplements calcium, regulates fertilizer pH, and adapts to soil environment; 4. Natural gypsum: Primarily composed of calcium sulfate, supplements sulfur while loosening soil and improving compaction; 5. Borax: Supplements boron, promoting crop pollination and fruit setting, reducing issues like barren corn tips, empty wheat husks, and shriveled rice grains; 6. Zinc sulfate monohydrate: Supplements zinc, promoting seedling growth, preventing white seedling disease, and improving photosynthetic efficiency. Attached Figure Description

[0008] Figure 1 This is a flowchart illustrating the preparation process of a high-temperature fission activated silicon-calcium-potassium-magnesium-sulfur-boron-zinc complete nutrient fertilizer without additives and its preparation method, according to the present invention. The specific steps are as follows: 1. Raw material pretreatment: Potassium feldspar / potassium-rich shale is crushed and ball-milled to 200 mesh; limestone and dolomite are crushed and ball-milled to 200 mesh; gypsum and slag are pulverized and then sieved.

[0009] 2. Ingredient mixing: Add the raw materials according to the proportion (potassium feldspar 60-70%, limestone 15-20%, dolomite 15-20%, gypsum 3-5%), add the binder (bentonite / starch) and mix evenly.

[0010] 3. Calcination activation: Calcine at 1150-1300℃ for 40-60 minutes in a rotary kiln to release silicon, calcium, potassium and magnesium elements through high-temperature melting activation.

[0011] 4. Water quenching: After calcination, the product is rapidly quenched in water (20-30℃) to maintain high nutrient activity.

[0012] 5. Crushing and grinding: The water-quenched material is coarsely crushed and finely ground to 300 mesh to obtain silicon-calcium-potassium-magnesium basic powder.

[0013] 6. Boron and zinc addition: Add 0.3-0.8% boron fertilizer (borax / boric acid) and 0.2-0.6% zinc fertilizer (zinc sulfate / chelated zinc), mix evenly to obtain multi-element compound powder.

[0014] 7. Granulation and molding: Granulate to a particle size of 2-4 mm by disc granulation / extrusion, dry at 100-120℃ and then cool.

[0015] 8. Finished product packaging: After screening and testing, the finished product is packaged and stored. Detailed Implementation Example

[0016] A high-temperature fission activated silicon, calcium, potassium, magnesium, boron, and zinc complete nutrient fertilizer without additives. The raw materials, by weight percentage, are: potassium feldspar 42%, dolomite 28%, limestone 18%, and natural gypsum 12%; after calcination, 0.15% borax and 0.15% zinc sulfate monohydrate are added.

[0017] Preparation method: 1. Crush all raw materials to 250 mesh and mix them evenly; 2. Put them into a calcining furnace and calcine at 1250℃ for 3 hours; 3. Quickly cool to 50℃, add borax and zinc sulfate monohydrate, and stir evenly to obtain the finished product. Example

[0018] A complete nutrient fertilizer containing no additives, produced by high-temperature fission activation of silicon, calcium, potassium, magnesium, boron, and zinc. The raw materials, by weight percentage, are: Potassium feldspar 40%, dolomite 30%, limestone 17%, natural gypsum 12%; after calcination, borax 0.2% and zinc sulfate monohydrate 0.2% are added.

[0019] Preparation method: 1. Crush all raw materials to 320 mesh and mix them evenly; 2. Put them into a calcining furnace and calcine at 1300℃ for 2 hours; 3. Quickly cool to 60℃; 4. Add borax and zinc sulfate monohydrate, and stir evenly to obtain the finished product.

[0020] Application Description: The fertilizer of this invention is environmentally friendly to paddy fields and is especially suitable for rice cultivation. Under flooded conditions, nutrients are not easily lost and are released stably, which can sustainably meet the nutritional needs of rice throughout its entire growth period and significantly improve rice's resistance to lodging and disease. At the same time, it is also suitable for dryland crops such as wheat and corn to achieve broad-spectrum yield increases.

[0021] Technical effect 1. No additives, low cost: No fluxing agents or combustion aids are used throughout the process, and the calcination cost is ≤60 RMB / ton, which is more than 50% lower than traditional processes; 2. High activity release: The high temperature of 1200-1300℃ causes the potassium feldspar crystal lattice to fully fission, with an effective potassium dissolution rate of ≥90%, and the utilization rate of silicon, calcium, and magnesium elements is increased by more than 30%; 3. Complete nutrient matching: Contains seven major nutrients: silicon, calcium, potassium, magnesium, sulfur, boron, and zinc. It is environmentally friendly to paddy fields, especially suitable for rice cultivation. Nutrients are not easily lost and are released stably under flooded conditions. At the same time, it meets the nutritional needs of wheat, corn, and other field crops throughout their entire growth period. 4. Increased yield and improved quality: Field trials show that wheat yield increases by 18-25%, corn yield increases by 20-28%, and rice yield increases by 15-25%. It performs exceptionally well in paddy field cultivation, with fuller grains and improved quality; 5. Improved soil: Gypsum loosens the soil, alleviates compaction, and enhances the soil's water and fertilizer retention capacity, making it suitable for long-term continuous cropping; 6. Strong resistance to adverse conditions: It enhances the crop's resistance to lodging, disease, and hot and dry winds, reduces the rate of premature aging of crops, and especially enhances the rice's resistance to rice blast and lodging.

Claims

1. A high-temperature fission activated complete nutrient fertilizer containing silicon, calcium, potassium, magnesium, boron, and zinc without additives, characterized in that... The raw materials, by weight percentage, include: 40-45% potassium feldspar, 25-30% dolomite, 15-20% limestone, and 8-12% natural gypsum. After calcination, 0.1-0.2% borax and 0.1-0.2% zinc sulfate monohydrate are added.

2. The additive-free, high-temperature fission activated silicon-calcium-potassium-magnesium-boron-zinc complete nutrient fertilizer according to claim 1, characterized in that, The potassium feldspar contains ≥1% potassium.

3. The preparation method of the additive-free high-temperature fission activated silicon-calcium-potassium-magnesium-boron-zinc complete nutrient fertilizer according to claim 1, characterized in that, Includes the following steps: (1) Pulverize potassium feldspar, dolomite, limestone and natural gypsum to 200-320 mesh respectively, and mix them evenly to obtain mixed raw materials; (2) Calcine the mixed raw materials at 1200-1300℃ for 2-4 hours without adding flux or combustion aid; (3) After calcination, quickly cool to below 60°C, add borax and zinc sulfate monohydrate, mix evenly to obtain the finished product.

4. The preparation method according to claim 3, characterized in that, The calcination temperature is 1250℃ and the calcination time is 3 hours.

5. The additive-free, high-temperature fission activated silicon-calcium-potassium-magnesium-boron-zinc complete nutrient fertilizer according to claim 1, characterized in that, The fertilizer has an effective potassium dissolution rate of ≥90%, is environmentally friendly to paddy fields, and is especially suitable for rice cultivation. Under flooded conditions, nutrients are not easily lost and are released stably. It is also suitable for wheat and corn cultivation, with a yield increase rate of ≥15%, while improving soil compaction and enhancing crop resistance.

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