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A kind of comprehensive utilization method of manganese slag

A manganese slag and solid technology, which is applied in the field of comprehensive utilization of industrial waste residue, can solve the problems of unprocessable wastewater, high cost, and low extraction rate, and achieve the effects of reduced process cost, high added value, and high product purity

Active Publication Date: 2016-04-06
崇左市富国新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, the above-mentioned methods of using manganese slag generally have problems such as low extraction rate, large amount of waste water that cannot be treated, and high cost.

Method used

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  • A kind of comprehensive utilization method of manganese slag

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Comparison scheme
Effect test

Embodiment 1

[0022] refer to figure 1 , the manganese slag comprehensive utilization method described in the present embodiment, comprises the following steps:

[0023] 1. Reaction: first crush electrolytic manganese slag or flue gas desulfurization manganese slag to 60 mesh, then mix it with 8% hydrofluorosilicic acid solution, place it in a reactor and heat it for 2 hours at a reaction temperature of 90°C; Manganese slag and fluorosilicic acid aqueous solution are mixed according to the mass volume ratio of 1:9; after the reaction, solid-liquid separation is carried out to obtain solid A and liquid A, and liquid A is returned to the reactor as a reaction raw material for reuse;

[0024] 2. Decomposition: put the solid A in the decomposition kettle, then add the decomposition agent into the decomposition kettle for decomposition reaction, the decomposition temperature is 150°C; the solid A and the decomposition agent are added into the In the decomposition kettle; after the decomposition...

Embodiment 2

[0028] refer to figure 1 , the manganese slag comprehensive utilization method described in the present embodiment, comprises the following steps:

[0029] 1. Reaction: first crush electrolytic manganese slag or flue gas desulfurization manganese slag to 100 mesh, then mix it with a 20% aqueous solution of fluosilicic acid, place it in a reactor and heat it for 3 hours at a reaction temperature of 105°C; Manganese slag and fluorosilicic acid aqueous solution are mixed according to the mass volume ratio of 1:5; after the reaction, solid-liquid separation is carried out to obtain solid A and liquid A, and liquid A is returned to the reactor as a reaction raw material for reuse;

[0030] 2. Decomposition: Put the solid A in the decomposition kettle, then add the decomposition agent into the decomposition kettle for decomposition reaction, the decomposition temperature is 200°C; the solid A and the decomposition agent are added into the In the decomposition kettle; after the deco...

Embodiment 3

[0034] refer to figure 1 , the manganese slag comprehensive utilization method described in the present embodiment, comprises the following steps:

[0035] 1. Reaction: first crush electrolytic manganese slag or flue gas desulfurization manganese slag to 150 mesh, then mix it with a 35% aqueous solution of fluosilicic acid, place it in a reactor and heat it for 4 hours at a reaction temperature of 120°C; Manganese slag and fluorosilicic acid aqueous solution are mixed according to the mass volume ratio of 1:1; after the reaction, solid-liquid separation is carried out to obtain solid A and liquid A, and liquid A is returned to the reactor as a reaction raw material for reuse;

[0036] 2. Decomposition: put the solid A in the decomposition kettle, then add the decomposition agent into the decomposition kettle for decomposition reaction, the decomposition temperature is 250°C; the solid A and the decomposition agent are added into the In the decomposition kettle; after the deco...

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Abstract

The invention relates to a comprehensive utilization method of industrial waste residues and particularly relates to a comprehensive utilization method of manganese slag. The method comprises the following steps: reaction, namely crushing the manganese slag, mixing the crushed manganese slag with a fluosilicic acid aqueous solution to react, and carrying out solid-liquid separation after reaction to obtain solid A and liquid A; decomposition, namely adding the solid A to a decomposing agent to undergo a decomposition reaction, adding a dissolving agent after the decomposition is finished, uniformly mixing and carrying out solid-liquid separation to obtain solid B and liquid B; absorption, namely enabling generated fluorine-containing gas to pass through an absorption tower to realize multistage circular absorption to obtain solid C and liquid C, and drying the solid C to obtain white carbon black; and neutralization, namely adding a neutralizing agent to the liquid B to obtain solid D and liquid D, carrying out high-temperature crystallization on the liquid D to obtain manganese sulfate and sulfate, and drying the solid D to obtain lightweight aluminium hydroxide. According to the comprehensive utilization method disclosed by the invention, useful elements in the manganese slag can be effectively extracted to produce basic chemical materials; in addition, the process is simple and no three-waste emission is caused; the effect of comprehensive utilization of manganese slag at high efficiency and low energy can be practically achieved.

Description

technical field [0001] The invention relates to a method for comprehensive utilization of industrial waste residues, in particular to a method for comprehensive utilization of manganese residues. Background technique [0002] In the prior art, the methods for extracting manganese element from manganese ore mainly include acid leaching and flue gas desulfurization. Among them, the acid leaching method mainly uses sulfuric acid to leach manganese in manganese ore, and a large amount of waste residue containing silicon, aluminum, and manganese is produced after leaching; the flue gas desulfurization method uses sulfur-containing waste gas discharged from power plants and manganese ore pulp Carrying out the reaction to produce manganese sulfate will also produce a large amount of waste residue containing valuable elements such as silicon, aluminum, and manganese. [0003] At present, the utilization of manganese slag in my country is mainly concentrated in cement additives, con...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/04
CPCY02P10/20
Inventor 杨晓红薛希仕
Owner 崇左市富国新材料科技有限公司