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Method for preparing microelement water-soluble fertilizer from manganese slag

A technology for trace elements and manganese slag, applied in the field of industrial waste slag resource utilization, can solve the problems of low utilization rate of nutrient elements, failure to maximize the utilization of manganese slag element resources, etc., and achieves low cost, ways to expand resource utilization, Simple production process

Inactive Publication Date: 2020-01-17
TONGREN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In the method provided by the above-mentioned patents, the utilization rate of nutrient elements in manganese slag is low, and the maximum utilization of trace element resources in manganese slag has not been realized

Method used

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  • Method for preparing microelement water-soluble fertilizer from manganese slag
  • Method for preparing microelement water-soluble fertilizer from manganese slag
  • Method for preparing microelement water-soluble fertilizer from manganese slag

Examples

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Effect test

Embodiment 1

[0029] A method for producing trace element water-soluble fertilizer from manganese slag, comprising the following steps:

[0030] (1) Reaction: Grind the manganese slag to 90 mesh and mix it with sulfuric acid with a concentration of 30w% at a ratio of 1:4 (t:m 3 ) were mixed in proportion, placed in a reaction kettle to control the temperature of the material at 100°C, and reacted for 60 minutes to obtain solution a;

[0031] (2) Neutralization reaction: add sodium hydroxide to solution a for neutralization reaction, control the temperature of the material at 50°C, pH 2, and react for 60 minutes to obtain solution b; the ratio of solution a to sodium hydroxide is 1:0.03 (m 3 :t)

[0032] (3) Activation reaction: Add citric acid to solution a and trace elements in the system to carry out chelation reaction, control the temperature at 50°C, and perform solid-liquid separation after reacting for 50 minutes to obtain solid c and liquid c; among them, the solution The ratio of...

Embodiment 2

[0041] A method for producing trace element water-soluble fertilizer from manganese slag, comprising the following steps:

[0042] (1) Reaction: Manganese slag is pulverized to 80 mesh and then mixed with sulfuric acid with a concentration of 50w% at a ratio of 1:0.5(t:m 3 ) were mixed in proportion, placed in a reaction kettle to control the material temperature at 20°C, and reacted for 120 minutes to obtain solution a;

[0043] (2) Neutralization reaction: Add sodium hydroxide to solution a for neutralization reaction, control the material temperature at 25°C, pH 3, react for 90min, and obtain solution b; the ratio of solution a to sodium hydroxide is 1:6 (m 3 :t)

[0044] (3) Activation reaction: add ethylenediaminetetraacetic acid to solution a to carry out chelation reaction with trace elements in the system, control the temperature at 20°C, and perform solid-liquid separation after 150 minutes of reaction to obtain solid c and liquid c; Wherein, the ratio of solution ...

Embodiment 3

[0052] A method for producing trace element water-soluble fertilizer from manganese slag, comprising the following steps:

[0053] (1) Reaction: Grind the manganese slag to 400 mesh and mix it with sulfuric acid with a concentration of 10w% at a ratio of 1:8 (t:m 3 ) were mixed in proportion, placed in a reaction kettle to control the material temperature at 120°C, and reacted for 5 minutes to obtain solution a;

[0054] (2) Neutralization reaction: add sodium hydroxide to solution a for neutralization reaction, control the material temperature at 100°C, pH 4, and react for 15 minutes to obtain solution b; the ratio of solution a to sodium hydroxide is 1:0.01 (m 3 :t)

[0055] (3) Activation reaction: Add organic acid to solution a and trace elements in the system to carry out chelation reaction, control the temperature at 90°C, and perform solid-liquid separation after reaction for 10 minutes to obtain solid c and liquid c; among them, the solution The ratio of b to organi...

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Abstract

The invention belongs to the field of industrial waste-slag resource utilization, and particularly relates to a method for preparing a microelement water-soluble fertilizer from manganese slag. The method comprises the following steps: performing a full reaction on the manganese slag and sulfuric acid, after the reaction is completed, adding a neutralizing agent, performing a neutralization reaction, after the neutralization reaction is completed, performing solid-liquid separation, adding a neutralizing agent into the liquid, performing a neutralization reaction, after the neutralization reaction is completed, performing solid-liquid separation on the mixed liquid, after the separation is completed, adding an amino acid microelement organic acid, performing a chelation reaction, after thechelation reaction is completed, performing solid-liquid separation, and performing concentration and drying on the separated liquid to obtain the microelement water-soluble fertilizer product. The method provided by the invention uses stronger chelating ability of the organic acid to extract nutrient elements such as copper, zinc, iron and manganese from the manganese slag to produce the microelement water-soluble fertilizer, can greatly reduce the risk on human health brought the lack of microelements in soil, meets the national requirements for soil protection and scientific fertilizationof crops in China, and expands the resource utilization path of the manganese slag; and the production process is simple, and the cost is lower.

Description

technical field [0001] The invention belongs to the field of resource utilization of industrial waste residues, in particular to a method for producing trace element water-soluble fertilizers from manganese residues. Background technique [0002] According to statistics, the current global production of manganese sulfate has reached 750,000 tons / year. As the global economy recovers, the use of basic raw materials continues to rise. In 2015, the global manganese sulfate output was 649,000 tons, in 2016, the global manganese sulfate output was 700,000 tons, and in 2017, the global manganese sulfate output was 754,000 tons. In the first half of 2018, the global production of manganese sulfate was 405,000 tons. In the past ten years, the annual growth rate of manganese sulfate consumption in western countries has been around 7%-8%, and the average consumption growth rate of manganese sulfate in China is 10%. Higher disadvantages. In recent years, the flue gas desulfurization ...

Claims

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Application Information

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IPC IPC(8): C05G3/00
CPCC05D9/02C05G3/00
Inventor 杨晓红薛希仕常军石维
Owner TONGREN UNIV
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