Novel instant magnesium humate granular fertilizer and preparation method thereof

Abstract

The invention relates to a novel instant magnesium humate granular fertilizer and a preparation method thereof.The preparation method comprises the steps that 40-70 parts by weight of high-purity humic acid, 10-30 parts by weight of magnesium hydroxide and 5-20 parts by weight of binder are taken and mixed, a 2% citric acid solution is sprayed, granulation is conducted in a high-speed stirring granulation mode, and a granulated wet material is formed; and putting the granulated wet material into a roller, drying, dehydrating and drying, controlling the temperature to be below 300 DEG C, controlling the moisture of the granules to be below 15%, then screening, and removing granules and powder except the specification size, thereby forming the novel instant magnesium humate granules. The prepared novel instant magnesium humate granular fertilizer is high in fertilizer efficiency, small in usage amount and convenient to transport and store, fertilizer efficiency components in citrate-soluble magnesium and humic acid can be disintegrated to release the fertilizer efficiency through natural rainfall or soil moisture absorption without irrigation or burying treatment, and the defects that an existing granular fertilizer is particularly poor in water solubility and poor in fertilizer efficiency are overcome. And the fertilizer efficiency cannot be effectively absorbed by plants due to long-term granular morphology in water.

Description

Technical Field

[0001] The invention relates to the technical field of humic acid fertilizers, and in particular to a novel instant magnesium humate granular fertilizer and a preparation method thereof. Background Art

[0002] Humic acid medium element fertilizer is a non-toxic, non-polluting, highly active green organic-inorganic fertilizer with humic acid as the core component and one or more of Ca, Mg, and S as the main elements. It can improve soil, increase crop yields, improve crop quality, and enhance stress resistance, playing an important role in agricultural production. Existing humic acid fertilizers act on crops in the form of powder and granules. However, powders have many inconveniences such as pollution, dust, and transportation. Although granular fertilizers do not have the above disadvantages, they are all products with particularly poor water solubility. They remain in granular form in water for a long time (usually maintaining the original granular form for more than 1 year), and the fertilizer effect cannot be effectively absorbed by plants. Summary of the invention

[0003] The purpose of the present invention is to provide a novel instant magnesium humate granular fertilizer and a preparation method thereof, which can take into account the advantages of both instant and slow-release fertilizers, has high granular strength and fast disintegration speed in water, and overcomes the defects of current granular fertilizers that the water solubility is particularly poor, the granular form is maintained in water for a long time, and the fertilizer effect cannot be effectively absorbed by plants.

[0004] In order to achieve the above object, the present invention provides the following technical solutions: A novel instant magnesium humate granular fertilizer comprises the following raw materials in parts by weight: 40-70 parts by weight of high-purity humic acid, 10-30 parts by weight of magnesium hydroxide, and 5-20 parts by weight of a binder.

[0005] Preferably, the binder is attapulgite clay.

[0006] The present invention also provides a method for preparing the novel instant magnesium humate granular fertilizer, comprising the following steps: S1, mixed granulation: take 40-70 parts by weight of high-purity humic acid, 10-30 parts by weight of magnesium hydroxide, and 5-20 parts by weight of a binder, mix the above raw materials, spray 2% citric acid solution, and granulate using a high-speed stirring granulation method to form a granulation wet material; S2. Drying: The granulated wet material is put into a drum dryer for dehydration and drying. The temperature is controlled below 300°C and the moisture content of the particles is controlled below 15%. Then, the particles and powder outside the specification size are removed through screening to form a new type of instant magnesium humate particles.

[0007] Preferably, the spraying ratio in step S1 is 20%-40%.

[0008] Preferably, the size of the novel instant magnesium humate particles in step S2 is 2-5 mm.

[0009] In summary, the beneficial effects of the present invention are as follows: the present application provides a novel instant magnesium humate granular fertilizer and a preparation method thereof, wherein the novel instant magnesium humate granular fertilizer prepared by the invention has high fertilizer efficiency, small usage amount, convenient transportation and storage, and the fertilizer components in the citric acid-soluble magnesium and humic acid do not need to be treated by irrigation or burial, and can be disintegrated and released by natural rainfall or absorption of soil moisture, thereby overcoming the defects that the current granular fertilizers have particularly poor water solubility, maintain the granular form in water for a long time, and the fertilizer effect cannot be effectively absorbed by plants, and can be used as a soil conditioner, and synthesized with nitrogen, phosphorus, potassium and other elements required by plants to form a multifunctional and efficient compound fertilizer, and can be used as a single fertilizer or mixed with other fertilizers. DETAILED DESCRIPTION

[0010] The specific embodiments of the present invention will be described in further detail below. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0011] The technical solutions described in the present invention, unless otherwise specified, are all conventional solutions in the art; the reagents or materials described, unless otherwise specified, are all from commercial channels. Example 1

[0012] (1) Raw material selection: 40 parts by weight of high-purity humic acid, 10 parts by weight of magnesium hydroxide, and 5 parts by weight of attapulgite clay.

[0013] (2) Mixing granulation: Mix the above three raw materials, spray 2% citric acid solution, the spraying ratio is 20%, and granulate by high-speed stirring granulation to form granulation wet material.

[0014] (3) Drying: The granulated wet material is put into a drum dryer for dehydration and drying. The temperature is controlled below 300°C and the moisture content of the particles is controlled below 15%. Then, after screening, the particles and powder outside the standard size are separated to form a new type of instant magnesium humate particles with a particle size of 2-5mm. Example 2

[0015] (1) Raw material selection: 55 parts by weight of high-purity humic acid, 20 parts by weight of magnesium hydroxide, and 12.5 parts by weight of attapulgite clay.

[0016] (2) Mixing granulation: Mix the above three raw materials, spray 2% citric acid solution at a spraying ratio of 30%, and use high-speed stirring granulation to form granulation wet material.

[0017] (3) Drying: The granulated wet material is put into a drum dryer for dehydration and drying. The temperature is controlled below 300°C and the moisture content of the particles is controlled below 15%. Then, after screening, the particles and powder outside the standard size are separated to form a new type of instant magnesium humate particles with a particle size of 2-5mm. Example 3

[0018] (1) Raw material selection: 70 parts by weight of high-purity humic acid, 30 parts by weight of magnesium hydroxide, and 20 parts by weight of attapulgite clay.

[0019] (2) Mixing granulation: Mix the above three raw materials, spray 2% citric acid solution, the spraying ratio is 40%, and granulate by high-speed stirring granulation to form granulation wet material.

[0020] (3) Drying: The granulated wet material is put into a drum dryer for dehydration and drying. The temperature is controlled below 300°C and the moisture content of the particles is controlled below 15%. Then, after screening, the particles and powder outside the standard size are separated to form a new type of instant magnesium humate particles with a particle size of 2-5mm.

[0021] In summary, the present invention provides a novel instant magnesium humate granular fertilizer and a preparation method thereof. The novel instant magnesium humate granular fertilizer prepared by the invention has high fertilizer efficiency, small usage amount, convenient transportation and storage, and the fertilizer components in the citric acid-soluble magnesium and humic acid do not need to be treated by irrigation or burial, and can be disintegrated and released by natural rainfall or absorption of soil moisture, thereby overcoming the defects that the current granular fertilizers have particularly poor water solubility, maintain the granular form in water for a long time, and the fertilizer effect cannot be effectively absorbed by plants. The invention can be used as a soil conditioner, and can be synthesized with nitrogen, phosphorus, potassium and other elements required by plants to form a multifunctional and efficient compound fertilizer, and can be used as a single fertilizer or mixed with other fertilizers.

[0022] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described 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.

[0023] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A novel instant magnesium humate granular fertilizer, characterized in that: The invention comprises the following raw materials in parts by weight: 40-70 parts by weight of high-purity humic acid, 10-30 parts by weight of magnesium hydroxide and 5-20 parts by weight of a binder.

2. A novel instant magnesium humate granular fertilizer as claimed in claim 1, characterized in that: The binder is attapulgite clay.

3. A method for preparing a novel instant magnesium humate granular fertilizer as claimed in any one of claims 1 to 2, characterized in that: The steps include: S1, mixed granulation: take 40-70 parts by weight of high-purity humic acid, 10-30 parts by weight of magnesium hydroxide, and 5-20 parts by weight of a binder, mix the above raw materials, spray 2% citric acid solution, and granulate using a high-speed stirring granulation method to form a granulation wet material; S2. Drying: The granulated wet material is put into a drum dryer for dehydration and drying. The temperature is controlled below 300°C and the moisture content of the particles is controlled below 15%. Then, the particles and powder outside the specification size are removed through screening to form a new type of instant magnesium humate particles.

4. The method for preparing a novel instant magnesium humate granular fertilizer according to claim 3, characterized in that: The spraying ratio in step S1 is 20%-40%.

5. The method for preparing a novel instant magnesium humate granular fertilizer according to claim 3, characterized in that: The specification size of the novel instant magnesium humate particles in step S2 is 2-5 mm.