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Preparation method of environment-friendly organic-inorganic compound fertilizer

An environment-friendly, compound fertilizer technology, applied in the direction of inorganic fertilizers, calcium fertilizers, fertilization devices, etc., can solve the problems that are not conducive to large-scale promotion and use, high hydrothermal reaction temperature, and low soluble silicon content, etc. Environmental protection, short reaction process and low price

Pending Publication Date: 2021-05-28
INST OF PROCESS ENG CHINESE ACAD OF SCI +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Patent CN108976086A discloses a preparation method of organic-inorganic compound fertilizer. In this method, crop stalks, poultry manure and inorganic fertilizer are respectively mixed and fermented twice to obtain compound fertilizer. The fertilizer has high fertilizer efficiency and good quality, but the complicated process is not conducive to mass production
Patent CN106397014A discloses a preparation method of silicon-calcium humate type soil conditioner. In this method, three types of raw materials are subjected to hydrothermal reaction respectively, and then homogenized to obtain silicon-calcium humate type soil conditioner. The method hydrothermally reacts High temperature, high energy consumption and complex process
Patent CN108424297A discloses a silicon fertilizer (soil conditioner) produced by utilizing wollastonite tailings and humus and its preparation method. In this method, the wollastonite tailings and humus are mixed and then added with a binder for granulation. , the content of soluble silicon in this silicon fertilizer is low, which is not conducive to the promotion and use of large areas
[0005] To sum up, it can be seen that there are various methods for preparing organic-inorganic compound fertilizers, but there are generally problems such as long preparation cycle, complicated process, high cost, and difficulty in popularization.

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  • Preparation method of environment-friendly organic-inorganic compound fertilizer
  • Preparation method of environment-friendly organic-inorganic compound fertilizer

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preparation example Construction

[0036] The invention provides a method for preparing an environment-friendly organic-inorganic compound fertilizer, which comprises the following steps:

[0037] (1) Putting silicon-rich substances and calcium-rich substances into lye, and obtaining a slurry with a pH of 9 to 13 after hydrothermal reaction;

[0038] Specifically, step (1) includes:

[0039] (1.1) Putting silicon-rich substances and calcium-rich substances into lye, hydrothermally reacting, and obtaining an intermediate slurry with a pH of 9-13;

[0040] Specifically, the silicon-rich substance is a mineral or waste residue mainly composed of silicon dioxide, such as fly ash, coal gangue, clay or quartz, but is not limited thereto. The silicon-rich substance can also be a mixture of two, three or four of the above substances.

[0041] Calcium-rich substances are industrial raw materials or waste residues mainly composed of calcium oxide, such as calcium hydroxide, lime, etc., but not limited thereto. The cal...

Embodiment 1

[0068] This embodiment provides an environment-friendly organic-inorganic compound fertilizer, the preparation method of which is as follows:

[0069] (1) Combine fly ash and lime according to CaO / SiO 2 Put the molar ratio of 1 into 0.6mol / L NaOH solution, hydrothermally react for 5 hours, and the temperature is 220°C; after the reaction is completed, cool down to 90°C to obtain a slurry with a pH of 11.3;

[0070] (2) After the humus is crushed, sieve it with an 80-mesh sieve, take the sieve material and add it to the slurry, stir and react for 10 minutes, filter and wash to obtain the product; wherein the weight ratio of the humus to the solid product in the slurry is 8:2 .

Embodiment 2

[0072] This embodiment provides an environment-friendly organic-inorganic compound fertilizer, the preparation method of which is as follows:

[0073] (1) Mix kaolin and calcium hydroxide according to CaO / SiO 2 Put the molar ratio of 1.1 into 1mol / L NaOH solution, hydrothermally react for 2 hours, and the temperature is 180°C; after the reaction is completed, cool down to 65°C to obtain a slurry with a pH of 9;

[0074] (2) After crushing the crop straw, sieve it with a 40-mesh sieve, take the sieve material and add it to the slurry, stir and react for 60 minutes, filter and wash, and obtain the product; wherein the weight ratio of the crop straw to the solid product in the slurry is 5: 5.

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Abstract

The invention discloses a preparation method of an environment-friendly organic-inorganic compound fertilizer. The preparation method comprises the following steps: (1) putting a silicon-rich substance and a calcium-rich substance into alkali liquor, and carrying out hydrothermal reaction to obtain slurry with the pH value of 9-13; and (2) adding solid organic wastes into the slurry, reacting for preset time, and carrying out solid-liquid separation to obtain the environment-friendly organic-inorganic compound fertilizer finished product. The content of citrate-soluble silicon in the prepared compound fertilizer is 10%-20%, the content of trace elements such as calcium, iron and magnesium and the content of organic matters are high, and the compound fertilizer is loose and porous; trace elements and organic matters required by plant growth are provided; and multiple effects of preserving moisture and fertility, preventing soil hardening, increasing soil activity and the like can be achieved.

Description

technical field [0001] The invention relates to the field of fertilizers, in particular to a preparation method of an environment-friendly organic-inorganic compound fertilizer. Background technique [0002] Organic-inorganic compound fertilizer is a new type of fertilizer that contains both organic matter and inorganic elements. It combines the advantages of organic fertilizers and inorganic fertilizers, and has the functions of promoting rapid plant growth, improving soil air permeability, loosening soil structure, and improving soil microbial activity. It has a positive effect on increasing crop yield and maintaining agricultural ecological balance. [0003] Due to the outstanding role of nitrogen, phosphorus and potassium elements in high crop yields, people have long regarded the application of nitrogen, phosphorus and potassium fertilizers as an important means of high crop yields. material accumulation. In addition to the nitrogen, phosphorus and potassium fertilize...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/80
CPCC05D3/00
Inventor 马淑花张宏明许敏第王晓辉穆小占石建萍周筱
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI