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Core-shell solid fertilizer rich in mineral substance and preparation method thereof

A solid fertilizer and mineral technology, applied in the directions of organic fertilizers, inorganic fertilizers, fertilizer mixtures, etc., can solve the problems of inability to supplement trace elements, environmental pollution, etc., to improve the utilization rate of the season, control the release time, and reduce land fertilization. amount of effect

Inactive Publication Date: 2018-10-16
SHENZHEN REVELATION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009](3) Environmental pollution
[0011] (4) Trace elements cannot be supplemented

Method used

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  • Core-shell solid fertilizer rich in mineral substance and preparation method thereof
  • Core-shell solid fertilizer rich in mineral substance and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] The first step, getting diameter is 55 parts by weight of urea granules of 8mm;

[0046] The second step is to take 40 parts by weight of ultrafine mineral particles containing medium and trace elements with a particle size of 400 microns obtained by coal and gangue through micro-mineral separation technology, and dissolve 5 parts by weight of polycarboxymethyl cellulose into an aqueous solution , disperse the mineral particles in the aqueous solution and mix uniformly to obtain a coating solution.

[0047] The third step is to completely coat the above-mentioned coating solution on the surface of urea particles by spraying or dipping, and then dry naturally or at a temperature not higher than 80°C to obtain the core of the mineral-rich particles Shell-type solid fertilizer.

Embodiment 2

[0049] The first step, getting diameter is 35 parts by weight of the ammonium phosphate particle of 14mm;

[0050] In the second step, 40 parts by weight of ultrafine mineral particles containing medium and trace elements with a particle size of 400 microns obtained by taking coal and coal gangue through micro-mineral separation technology are added to a paste composed of 25 parts by weight of starch and water, Mix evenly to obtain coating liquid.

[0051] The third step is to coat the above-mentioned coating solution on the surface of ammonium phosphate particles by rolling coating method or dip coating method, and then dry naturally or at a temperature not higher than 80°C to obtain the mineral-rich particles. Core-shell solid fertilizer.

Embodiment 3

[0053] The first step, getting diameter is 80 weight parts of the potassium sulfate particle of 6mm;

[0054] In the second step, 12 parts by weight of ultrafine mineral particles containing medium and trace elements with a particle diameter of 100 microns obtained by taking coal and coal gangue through the micro-mineral separation technology, adding 8 parts by weight of water glass aqueous solution, and mixing uniformly to obtain a package Overlay.

[0055] In the third step, the coating liquid is coated on the surface of ammonium phosphate particles by a dip coating method, and then naturally cooled and dried to obtain the core-shell solid fertilizer rich in minerals.

[0056] Specific use case

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Abstract

The invention discloses core-shell solid fertilizer rich in mineral substance. The core-shell solid fertilizer comprises the following raw materials in percentage by weight: A, 35 to 98.5 percent of at least one of chemical fertilizer particles in nitrogen fertilizer, phosphate fertilizer and potash fertilizer; B, 1 to 40 percent of coal or separated mineral particles from gangue before the gangueis burnt or subjected to chemical conversion; C, 0.5 to 25 percent of an adhesive, wherein the outer surface of the chemical fertilizer particles is coated with a plurality of mineral particles through the adhesive. The mineral particles are rich in medium trace elements, such as at least one of B, Ca, Cl, Cu, Fe, Mg, Mn, Mo, S and Zn, which are necessary for plant growth. The core-shell solid fertilizer can realize cost-optimal and high-efficiency utilization of mineral substance waste in coal chemical industry. The core-shell solid fertilizer can control the release rate of chemical fertilizer particles through the concentration of porous mineral substance particles and the thickness of a coating layer. The invention further discloses a preparation method of the core-shell solid fertilizer rich in mineral substance.

Description

technical field [0001] The invention belongs to the field of fertilizer industry, and in particular relates to a core-shell solid fertilizer rich in minerals and a preparation method thereof. Background technique [0002] Fertilizer is the food of crops. my country is one of the countries with the largest consumption of chemical fertilizers. It accounts for 8% of the world's arable land, but uses about 30% of the amount of chemical fertilizers. Due to excessive or unreasonable fertilization, the input-output ratio has decreased and increased. Cost of production. In addition, the excessive use of chemical fertilizers has also brought about a series of problems: [0003] (1) Soil compaction [0004] Long-term single application of chemical fertilizers will cause soil acidification, kill bacteria in the soil, and humus cannot be replenished in time, which will cause soil compaction. After excessive nitrogen fertilizer is applied to the soil, the nitrogen supply of microorgani...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00
CPCC05B7/00C05C9/00C05D1/02C05G3/00C05G5/30C05D9/00C05D9/02C05F11/00
Inventor 刘科翁力李国涛吴昌宁
Owner SHENZHEN REVELATION TECH CO LTD
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