Preparation process for organic-inorganic compound fertilizer

A compound fertilizer and preparation process technology, applied in fertilizer forms, fertilizer mixtures, fertilization devices, etc., can solve problems such as accumulation of harmful substances that increase the degree of soil compaction, decline in the quality of agricultural products, and large use of chemical fertilizers. The effect of improving utilization and meeting growth needs

Inactive Publication Date: 2011-01-19
NORTHWEST A & F UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the application of nitrogen fertilizer can promote the growth of crops and increase the yield, excessive application of nitrogen fertilizer will reduce the quality of agricultural products and cause potential harm to human and animal health
However, the problems existing in the existing agricultural production are the shortage of organic fertilizers and the large amount of chemical fertilizers used, which will increase the degree of soil compaction and the accumulation of harmful substances.
However, in the current preparation of organic-inorganic compound fertilizers, there are often problems such as difficulty in forming balls after adding organic materials, and late product moisture absorption and caking.

Method used

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  • Preparation process for organic-inorganic compound fertilizer
  • Preparation process for organic-inorganic compound fertilizer

Examples

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Effect test

Embodiment 1

[0064] The preparation technology of organic-inorganic compound fertilizer is characterized in that it comprises the following steps:

[0065] 1) Mix nitric acid with a volume concentration of 28% and lignite at a ratio of 1:0.3 by mass, then fully stir, and react at 80° C. for 36 hours; after the reaction is completed, filter and separate to obtain an organic precipitate containing lignite nitrated humic acid;

[0066] 2) Add 2.5 times the mass of ammonium bicarbonate to the organic matter precipitate containing lignite nitrating humic acid, react at 50°C for 10 hours, and then dry at room temperature, lignite nitrating humic acid reacts with ammonium bicarbonate or ammonia water to form lignite nitrating humic acid ammonium salt ;

[0067] 3) by lignite nitration humic acid ammonium salt: the ratio of mass ratio=1:2 of inorganic fertilizer, lignite nitration humic acid ammonium salt 120~180kg, potassium chloride 90~160kg and ammonium dihydrogen phosphate 100~200kg are mixed,...

Embodiment 2

[0073] The preparation technology of organic-inorganic compound fertilizer is characterized in that it comprises the following steps:

[0074] 1) Mix nitric acid with a volume concentration of 25% and lignite at a mass ratio of 1:0.5, then fully stir, and react at 90°C for 24 hours; after the reaction is completed, filter and separate to obtain an organic precipitate containing lignite nitrated humic acid;

[0075] 2) Add ammonia water (volume concentration 28%) of 3 times its mass to the organic matter precipitation containing lignite nitrating humic acid, react at 55°C for 8h, and then dry at room temperature, lignite nitrating humic acid reacts with ammonium bicarbonate or ammonia water to form lignite Ammonium humic acid salt;

[0076] 3) Mix it according to the mass ratio of lignite nitrated humic acid ammonium salt: inorganic fertilizer = 1: 3, mix lignite nitrated humic acid ammonium salt 150-190kg, potassium chloride 190-250kg and ammonium dihydrogen phosphate 180-260k...

Embodiment 3

[0082] The preparation technology of organic-inorganic compound fertilizer is characterized in that it comprises the following steps:

[0083] 1) Mix nitric acid with a volume concentration of 25% and lignite in a mass ratio of 1:0.4, then fully stir, and react for 30 hours at 85° C.; filter and separate after the reaction is completed, and obtain an organic precipitate containing lignite nitrated humic acid;

[0084] 2) adding ammonia water of 3.5 times the mass to the organic matter precipitation containing lignite nitrating humic acid, reacting at 55° C. for 8 hours, and then drying at room temperature, lignite nitrating humic acid reacts with ammonium bicarbonate or ammonia water to generate lignite nitrating humic acid ammonium salt;

[0085] 3) According to the mass ratio of lignite nitrated humic acid ammonium salt: inorganic fertilizer = 1: 2.5, 150-190 kg of lignite nitrated humic acid ammonium salt, 180-260 kg of diammonium hydrogen phosphate, 20-30 kg of bentonite, a...

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Abstract

The invention discloses a preparation process for an organic-inorganic compound fertilizer. The preparation process comprises the following steps of: after reacting nitric acid with lignite, obtaining lignite nitrification humic acid-containing organic matter precipitate by filtering and separating; matching the lignite nitrification humic acid with an inorganic fertilizer; respectively preparing into lignite nitrification humate-urea secondary fertilizer granules and lignite nitrification humate-formaldehyde sustained-release composite granules; and obtaining the organic-inorganic compound fertilizer. A humic acid raw material is extracted by oxidizing the lignite with the nitric acid, so that the humic acid and fulvic acid are improved remarkably; and therefore, the production cost of a humid acid fertilizer can be reduced and resource is saved. The organic-inorganic compound fertilizer can improve soil nutrient status and granular structures and meets the growth demand of crops.

Description

technical field [0001] The invention belongs to the field of agricultural fertilizers, and relates to the preparation of an organic-inorganic compound fertilizer, in particular to a preparation process of an organic-inorganic compound fertilizer based on lignite nitrated humate. Background technique [0002] The pollution and harm of chemical fertilizers to soil are becoming more and more serious. For example, the pollution of nitrogen fertilizer to soil, according to statistics, the utilization rate of nitrogen fertilizer is only about 30%, the loss rate of volatilization is about 20%, the loss of leaching is about 10%, the loss of denitrification and denitrification is about 15%. And the water loss rate is about 15%, and the total loss is more than 60%. The lost nitrogen will directly pollute the environment after leaving the soil, thus bringing new pollution. [0003] On the other hand, the pollution of agricultural products by chemical fertilizers is mainly fruits and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00C05G5/00
Inventor 李丙智张林森邢俊义陈伟星王飞
Owner NORTHWEST A & F UNIV
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