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Medium trace element compound fertilizer as well as preparation method and application thereof

A technology of medium and trace elements and compound fertilizers, applied in the direction of application, inorganic fertilizers, calcium fertilizers, etc., to achieve the effect of reducing heavy metals in the soil, loosening the soil, and meeting the needs

Inactive Publication Date: 2020-08-25
武汉吴教授农业科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the deficiencies in the prior art above, the object of the present invention is to provide a compound fertilizer with medium and trace elements and its preparation method and application. The present invention uses low-grade boron ore powder and concentrated acid solution as raw materials to prepare a compound fertilizer with a pH value of 3. -5 acidic medium and trace element compound fertilizer can not only make full use of low-grade boron-magnesium ore resources, but also effectively solve the problem of environmental pollution, without any waste gas, fertilizer residue and waste water, and the prepared acidic medium and trace element compound fertilizer can Used in the improvement of alkaline soil

Method used

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  • Medium trace element compound fertilizer as well as preparation method and application thereof
  • Medium trace element compound fertilizer as well as preparation method and application thereof
  • Medium trace element compound fertilizer as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0053] A preparation method of medium and trace element compound fertilizer, comprising the steps of:

[0054] (1) After crushing 100kg of low-grade boron-magnesium ore through an 80-mesh sieve, add 99.135kg of concentrated sulfuric acid with a concentration of 75% into the reaction tank, then put it into the agitator to stir and mix evenly at a speed of 80r / min, and place it at 80°C Down reaction 15min, obtains fertilizer intermediate;

[0055] (2) Pass the intermediate fertilizer through an 80-mesh sieve after being stacked and matured at normal temperature for 10 days to obtain a medium and trace element fertilizer.

[0056] The prepared compound medium trace element fertilizer has a moisture content of less than 5%, a pH of 3.78, and effective B 2 o 3 The mass fraction of water-soluble MgO is 4.92%, the mass fraction of water-soluble MgO is 15.37%, and the mass fraction of water-soluble CaO is 2.93%, which can be directly applied in alkaline or acidic soil.

Embodiment 2

[0058] A preparation method of medium and trace element compound fertilizer, comprising the steps of:

[0059] (1) After crushing 100kg of low-grade boron-magnesium ore through a 60-mesh sieve, add 106.76kg of concentrated sulfuric acid with a concentration of 85% to the reaction tank, then put it into a stirrer and stir at a speed of 60r / min and mix evenly. React for 2 minutes to obtain the fertilizer intermediate;

[0060] (2) Pass the intermediate fertilizer through a 90-mesh sieve after being stacked and matured at normal temperature for 10 days to obtain a medium and trace element fertilizer.

Embodiment 3

[0062] A preparation method of medium and trace element compound fertilizer, comprising the steps of:

[0063] (1) After crushing 100kg of low-grade boron-magnesium ore through a 120-mesh sieve, add 68.63kg of concentrated sulfuric acid with a concentration of 45% into the reaction tank, then put it into the agitator and stir at a speed of 100r / min and mix evenly. Under reaction 10min, obtain fertilizer intermediate;

[0064] (2) Pass the intermediate fertilizer through a 100-mesh sieve after being stacked and matured at normal temperature for 10 days to obtain a medium and trace element fertilizer.

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Abstract

The invention relates to the technical field of inorganic fertilizers, in particular to a medium-trace element compound fertilizer and a preparation method and application thereof. The medium-trace element compound fertilizer is prepared by taking low-grade boron-magnesium ore as a raw material, performing acidolysis reaction in concentrated acid liquor at 60-80 DEG C after crushing to obtain a fertilizer intermediate, and stacking and curing the fertilizer intermediate, wherein the concentrated acid solution is concentrated sulfuric acid or concentrated nitric acid, and the concentrated acidsolution is concentrated sulfuric acid. According to the invention, low-grade boron ore powder and concentrated acid liquor are used as raw materials; the acidic medium trace element compound fertilizer with the pH value of 3-5 is prepared, low-grade boron-magnesium ore resources can be fully utilized, the problem of environmental pollution can be effectively solved; no waste gas, fertilizer residues or wastewater is generated, and the prepared acidic medium trace element compound fertilizer can be applied to improvement of alkaline soil.

Description

technical field [0001] The invention relates to the technical field of inorganic fertilizers, in particular to a compound fertilizer with medium and trace elements and its preparation method and application. Background technique [0002] In 1843, Liebig proposed the law of "minimum nutrient rate", pointing out that crop growth and development need to absorb various nutrients, but the effective plant growth factor with the smallest relative content in the soil determines the crop yield, and the crop yield is within a certain limit. With the increase or decrease of this factor, it will change accordingly. Because of this limiting factor, it is difficult to increase the yield of crops even if other nutrients continue to be increased; The medium and trace elements that have been taken away have not been replenished in time, resulting in more and more shortages of medium and trace elements in the soil, and the problem of unbalanced soil application has become more and more seriou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/80
CPCC05D3/00C05G3/80C05D9/00
Inventor 吴礼树程艳徐亮王建泽
Owner 武汉吴教授农业科技有限公司
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