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Mineral slow-release fertilizer and preparation method thereof

A slow-release fertilizer and mineral technology, applied in nitrogen fertilizer, phosphate fertilizer, calcareous fertilizer, etc., can solve the problems of poor environmental friendliness, high cost of nitrification inhibitor, difficult to widely use, etc. Dissolution and release effects

Active Publication Date: 2022-05-10
HUADIAN ELECTRIC POWER SCI INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, nitrification inhibitors are difficult to be widely used due to reasons such as high cost and poor environmental friendliness.

Method used

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  • Mineral slow-release fertilizer and preparation method thereof
  • Mineral slow-release fertilizer and preparation method thereof
  • Mineral slow-release fertilizer and preparation method thereof

Examples

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preparation example Construction

[0031] The invention provides a kind of preparation method of mineral slow-release fertilizer, it is characterized in that, comprises the following steps:

[0032] a) mixing materials: mixing materials to obtain a mixing material;

[0033] Described material comprises the component of following mass parts:

[0034]

[0035] Wherein, the pretreated fly ash is plasma pretreated fly ash, which is obtained in the following manner:

[0036] Put the fly ash in the plasma reactor for pretreatment for 10-40 minutes to obtain the pretreated fly ash;

[0037] The power of the plasma treatment is 40-90W, the treatment gas is oxygen, and the flow rate of the treatment gas is 20-60L / min;

[0038] b) Balling and granulation:

[0039] The mixture is granulated into balls to obtain spherical granules;

[0040] c) steam curing:

[0041] The spherical granules are subjected to steam curing to obtain a spherical fly ash-based mineral slow-release fertilizer.

[0042] Regarding step a)...

Embodiment 1

[0078] 1. Raw materials:

[0079]

[0080] Wherein, the pretreated fly ash is plasma pretreated fly ash, obtained by the following method: put the fly ash in a plasma reactor for pretreatment for 20 minutes to obtain the pretreated fly ash;

[0081] The power of the plasma treatment is 60W, the treatment gas is oxygen, and the flow rate of the treatment gas is 40L / min.

[0082] 2. Preparation:

[0083] After the fly ash is pretreated by plasma treatment, it is sent into the horizontal mixer, and other raw materials are also sent into the horizontal mixer, and mixed at 25 rpm for 25 minutes to obtain a mixture. The mixed material enters the screw feeder below, and then is transported by the bucket elevator to the disc ball forming machine. The diameter of the disc ball forming machine is 2m, the inclination angle is 40°, the speed is 30r / min, and the ball forming takes 0.5h During the period, the nozzle of the tray is regularly sprinkled with water, and the total amount of w...

Embodiment 2

[0085] 1. Raw materials:

[0086]

[0087] Wherein, the pretreated fly ash is plasma pretreated fly ash, obtained by the following method: put the fly ash in the plasma reactor for pretreatment for 10 minutes to obtain the pretreated fly ash;

[0088] The power of the plasma treatment is 90W, the treatment gas is oxygen, and the flow rate of the treatment gas is 60L / min.

[0089] 2. Preparation:

[0090] Carry out according to the process of Example 1, the difference is: in the steam curing step, the initial temperature is 60° C., the relative humidity is 80%, the target temperature is 95° C., and the curing is for 24 hours.

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Abstract

The invention provides a mineral slow-release fertilizer and a preparation method thereof. The preparation method provided by the invention comprises the following steps: a) mixing materials: mixing the materials to obtain a mixture; the materials comprise the following components in parts by mass: 85-90 parts of pretreated fly ash, 3-5 parts of bentonite, 3-5 parts of ordinary Portland cement, 0.2-3.5 parts of urea, 0.2-4 parts of diammonium hydrogen phosphate, 1-3 parts of desulfurized gypsum and 8-15 parts of water; wherein the pretreated fly ash is plasma pretreated fly ash, and is obtained by the following steps: putting fly ash into a plasma reaction kettle, and pretreating for 10-40 minutes, so as to obtain the pretreated fly ash; the power of the plasma treatment is 40-90 W, the treatment gas is oxygen, and the flow of the treatment gas is 20-60 L / min; b) balling and granulating; and c) steam curing. The mineral slow-release fertilizer prepared by the invention can reduce the cost, and is safe, environment-friendly, high in stability and long in effective period.

Description

technical field [0001] The invention relates to the field of fertilizers, in particular to a slow-release mineral fertilizer and a preparation method thereof. Background technique [0002] The application of chemical fertilizers is a key link in agricultural production, affecting the yield and quality of agricultural products. However, at present, the problem of improper use of chemical fertilizers in agricultural production is serious, resulting in low utilization of chemical fertilizers has become a common problem, and it has also caused environmental problems such as eutrophication of water bodies and increased emissions of nitrogen oxides. Therefore, developing and improving the characteristics and production process of fertilizers, and improving the utilization rate of nutrients in chemical fertilizers are research hotspots in agricultural production. [0003] Slow-release fertilizer is a new type of fertilizer with slow nutrient release rate and release pattern that m...

Claims

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Application Information

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IPC IPC(8): C05G3/00C05G3/40C05G3/90C05G5/12
CPCC05B7/00C05G3/00C05G3/40C05G3/90C05G5/12C05C9/00C05D3/02C05D9/00Y02P60/21
Inventor 俞能刘光耀彭小圣张洋洋姜华新
Owner HUADIAN ELECTRIC POWER SCI INST CO LTD
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