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Method for activating calcium magnesium phosphate fertilizer by virtue of low-molecular organic acid

A technology of low-molecular organic acid and calcium-magnesium phosphate fertilizer, applied in liquid fertilizers, fertilization devices, fertilizer mixtures, etc., can solve problems such as unclear environmental risks and application restrictions, and achieve simple preparation methods, convenient operation, and improved phosphorus use rate effect

Inactive Publication Date: 2015-01-07
YUNNAN MINZU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, the possible environmental risks of chemical components other than humic acid in industrial waste are not yet clear, and their application is also limited

Method used

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  • Method for activating calcium magnesium phosphate fertilizer by virtue of low-molecular organic acid

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] First prepare the citric acid solution of 15mmol / L, place it in the liquid storage tank, then add the citric acid solution in the liquid storage tank to the shaking reactor with calcium magnesium phosphate fertilizer, the liquid-solid mixture of citric acid solution and calcium magnesium phosphate fertilizer The ratio is 15ml: 1g, wherein the main chemical composition mass percentage of calcium magnesium phosphate fertilizer is: P 2 o 5 15.03%, MgO 18.16%, CaO 34.02%, SiO 2 28.25%, Fe 2 o 3 4.45%, Mn 0.0653%, Cu 0.0214%, Co 0.0015%, Mo 0.0018%, the total amount is 100%; finally shake the shaking reactor at 25°C for 1h, the shaking speed is 200rpm, after the shaking is completed, the reaction Filter the liquid-solid mixture in the filter to separate the solid and liquid, and return the obtained liquid to the liquid storage tank to avoid pollution; after the separated solid is collected, it is naturally air-dried at room temperature to obtain activated calcium magne...

Embodiment 2

[0030] First prepare 20mmol / L oxalic acid solution, place it in the liquid storage tank, then add the oxalic acid solution in the liquid storage tank to the shaking reactor with calcium magnesium phosphate fertilizer, the liquid-solid ratio of oxalic acid solution to calcium magnesium phosphate fertilizer is 18ml : 1g, wherein the main chemical composition mass percentage of calcium magnesium phosphate fertilizer is: P 2 o 5 18.23%, MgO 16.08%, CaO 35.42%, SiO 2 26.02%, Fe 2 o 3 4.17%, Mn 0.0586%, Cu 0.0178%, Co 0.0024%, Mo 0.0012%, the total amount is 100%; finally shake the shaking reactor at 35°C for 1h, the shaking speed is 210rpm, after the shaking is completed, the reaction Filter the liquid-solid mixture in the filter to separate the solid and liquid, and collect the obtained liquid in the liquid storage tank to avoid pollution; after the separated solid is collected, it is naturally air-dried at room temperature to obtain activated calcium magnesium phosphate fer...

Embodiment 3

[0032]First prepare the tartaric acid solution of 25mmol / L, place it in the liquid storage tank, then add the tartaric acid solution in the liquid storage tank to the shaking reactor with calcium magnesium phosphate fertilizer, the liquid-solid ratio of tartaric acid solution and calcium magnesium phosphate fertilizer is 10ml : 1g, wherein the main chemical composition mass percentage of calcium magnesium phosphate fertilizer is: P 2 o 5 17.26%, MgO 19.08%, CaO 37.42%, SiO 2 23.06%, Fe 2 o 3 3.10%, Mn 0.0643%, Cu 0.0117%, Co 0.0025%, Mo 0.0015%, the total amount is 100%; finally shake the shaking reactor at 30°C for 1.5h, the shaking speed is 200rpm, after the shaking is completed, put The liquid-solid mixture in the reactor is filtered to separate the solid and liquid, and the obtained liquid is collected in the liquid storage tank to avoid pollution; after the separated solid is collected, it is naturally air-dried at room temperature to obtain activated calcium magnesi...

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Abstract

The invention provides a method for activating a calcium magnesium phosphate fertilizer by virtue of a low-molecular organic acid. The method comprises the following steps: uniformly mixing water and the low-molecular organic acid according to a proportion to obtain a low-molecular organic acid solution; adding the low-molecular organic acid solution and the calcium magnesium phosphate fertilizer into an oscillatory reactor for oscillation according to a certain liquid-solid ratio; after oscillation, performing filtering treatment on a liquid-solid mixture; air-drying filtered solids at room temperature to obtain an activated calcium magnesium phosphate fertilizer; performing a pot experiment on the activated calcium magnesium phosphate fertilizer, wherein the phosphate content of a crop is increased by 53 to 95 percent, and the crop flourishes. The method is low in cost, the process is simple, a gap between the calcium magnesium phosphate fertilizer and a high-concentration phosphate fertilizer in terms of phosphate utilization rate is closed, an important means is provided for optimizing the calcium magnesium phosphate fertilizer industry, and meanwhile, the application prospect of low-grade phosphate rocks in China is broadened.

Description

technical field [0001] The invention belongs to the technical field of phosphorus chemical application, and specifically relates to a method for activating calcium-magnesium phosphate fertilizer with low-molecular-weight organic acids. Background technique [0002] Phosphate fertilizer is one of the important raw material fertilizers in agricultural production. Phosphate rock is the main raw material for the production of phosphate fertilizer. The distribution of its resources in my country has the following characteristics: (1) The distribution is relatively concentrated, "more in the south and less in the north"; (2) resources "Abundant but not rich", the average ore grade is only 17%; (3) Mining is difficult and resource utilization is low. The above-mentioned characteristics of phosphate rock resources restrict the development of my country's phosphate fertilizer industry to a certain extent. [0003] Calcium magnesium phosphate fertilizer is one of the traditional phos...

Claims

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Application Information

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IPC IPC(8): C05G3/00
CPCC05G5/23
Inventor 马林转黄超郭俊明袁明龙
Owner YUNNAN MINZU UNIV
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