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Double-coating spherical fertilizer and its preparation method

A double-coated, spherical technology, applied in fertilizer forms, fertilizer mixtures, fertilization devices, etc., can solve the problems of affecting the efficiency and effect of fertilization, high production and use costs, inability to spread far and spread evenly, etc. The effect of less pollution, saving usage, and reducing the chance of fixing

Active Publication Date: 2014-09-03
YANTAI INST OF COASTAL ZONE RES CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, in order to prevent the agglomeration of inorganic coated fertilizers, the method of spraying anti-caking agents on the surface of particles is generally adopted. Therefore, the specific surface area is large, and more anti-caking agents are consumed, and the production and use costs are also higher.
③The particles are small, the specific surface area is large, and the contact area with the soil is also large; the particles are small, and the dispersion degree after being applied to the soil is also large; therefore, the effective nutrients of the fertilizer are more likely to be fixed by the soil, which reduces the utilization rate of the fertilizer
④ When farmers apply fertilizers, they usually spread them with bare hands. In case of windy weather, the fertilizer with small particles will drift with the wind and cannot be spread far and evenly, which will affect the efficiency and effect of fertilization

Method used

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  • Double-coating spherical fertilizer and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Double-coated spherical fertilizer and preparation method thereof:

[0026] 1. Fertilizer core: the fertilizer core is raised as a compound fertilizer (16-16-16, 48%), weighed 0.6 kg, and bonded it into a ball by a starch-based binder.

[0027] The preparation of described binding agent is:

[0028] 1) Add 500ml of water into the reaction vessel and heat it up to 50°C.

[0029] 2) Add 100 g of wheat starch into the reactor, stir evenly, and then add 40 ml of hydrogen peroxide (purity is 30%) therein.

[0030] 3) Rapidly increase the temperature of the reactants in the reactor to make the temperature of the liquid in the reactor reach 65° C., dissolve 80 g of potassium hydroxide in 140 ml of water, and slowly add the potassium hydroxide solution while stirring the liquid in the reactor.

[0031] 4) Take 5g of sodium tetraborate, dissolve it in 60ml of water, slowly add it into the reactor liquid, and react for 10 minutes.

[0032] 5) Take 10g of anhydrous calcium chlo...

Embodiment 2

[0038] Double-coated spherical fertilizer and preparation method thereof:

[0039]1. Fertilizer core: The fertilizer core is compound fertilizer (16-16-16, 48%), weighed 1.2 kg, and bonded it into a ball with a starch-based binder.

[0040] The preparation of described binding agent is:

[0041] 1) Add 500ml of water into the reaction vessel and heat it up to 50°C.

[0042] 2) Add 100 g of wheat starch into the reactor, stir evenly, and then add 40 ml of hydrogen peroxide (purity is 30%) therein.

[0043] 3) Rapidly increase the temperature of the reactants in the reactor to make the temperature of the liquid in the reactor reach 65° C., dissolve 80 g of potassium hydroxide in 140 ml of water, and slowly add the potassium hydroxide solution while stirring the liquid in the reactor.

[0044] 4) Take 5g of sodium tetraborate, dissolve it in 60ml of water, slowly add it into the reactor liquid, and react for 10 minutes.

[0045] 5) Take 10g of anhydrous calcium chloride, disso...

Embodiment 3

[0050] 1. Fertilizer core: The fertilizer core is compound fertilizer (16-16-16, 48%), weighed 1.8 kg, and bonded it into a ball with a starch-based binder.

[0051] The preparation of described binding agent is:

[0052] 1) Add 500ml of water into the reaction vessel and heat it up to 50°C.

[0053] 2) Add 100 g of wheat starch into the reactor, stir evenly, and then add 40 ml of hydrogen peroxide (purity is 30%) therein.

[0054] 3) Rapidly increase the temperature of the reactants in the reactor to make the temperature of the liquid in the reactor reach 65° C., dissolve 80 g of potassium hydroxide in 140 ml of water, and slowly add the potassium hydroxide solution while stirring the liquid in the reactor.

[0055] 4) Take 5g of sodium tetraborate, dissolve it in 60ml of water, slowly add it into the reactor liquid, and react for 10 minutes.

[0056] 5) Take 10g of anhydrous calcium chloride, dissolve it in 60ml of water, then slowly add the calcium chloride solution into ...

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Abstract

The invention belongs to the fertilizer field, and concretely relates to a preparation method of a novel double-coating spherical fertilizer with an inorganic fertilizer as a core. The preparation method comprises a step that the double-coating spherical fertilizer is obtained through sequentially coating the fertilizer core with a binder, an inorganic coating and an organic-inorganic composite coating, wherein the inorganic coating comprises 15-17 parts by weight of gypsum, 5-6 parts by weight of heavy calcium, 2-3 parts by weight of sierozem powder and 5-8 parts by weight of the binder; and the organic-inorganic composite coating comprises 25-30 parts by weight of a cotton stalk decomposed product, 5-10 parts by weight of starch, 10-15 parts by weight of the heavy calcium, 5-10 parts by weight of the sierozem powder, 5-7 parts by weight of gypsum and 14-20 parts by weight of the binder. The preparation method enables the large-granule spherical coating fertilizer to be developed through treating a natural organic matter and an inorganic mineral as main raw materials by a multiple coating technology. The fertilizer core provides nutritional elements for crops, and the organic coating provides conditions for improving the properties of soil, so the fertilizer effect utilization can be improved through the mineral coating and the natural organic matter coating to a great extent.

Description

technical field [0001] The invention belongs to the field of fertilizers, and in particular relates to a preparation method of a novel double-coated spherical fertilizer with inorganic fertilizers as the core. Background technique [0002] Coated fertilizer is currently the direction of increasing crop yield and developing sustainable and efficient agriculture, and has become the focus of research and development in countries all over the world. Coated fertilizers generally use compound fertilizer or urea as the fertilizer core, and then coat a layer of organic or inorganic film on the surface of the fertilizer core to control the slow release of fertilizer nutrients to achieve the purpose of extending fertilizer efficiency and improving fertilizer utilization. [0003] At present, there are mainly two types of coating materials developed at home and abroad, one is organic polymers (such as resin polyolefins), and the other is poorly water-soluble or slightly water-soluble i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C05G3/00C05G5/00
Inventor 孙凯宁于君宝陈小兵
Owner YANTAI INST OF COASTAL ZONE RES CHINESE ACAD OF SCI
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