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Method for recovering soluble manganese and ammonium from electrolytic manganese slag

Active Publication Date: 2021-02-26
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After long-term rainwater and underground river erosion, the tailings reservoir leaked
The soluble MnSO 4 and (NH 4 ) 2 SO 4 With the leachate flowing into the surface waters, the ammonia nitrogen and manganese in a large area of ​​water body exceed the standard, causing serious damage to the local water ecological balance and human drinking water safety

Method used

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  • Method for recovering soluble manganese and ammonium from electrolytic manganese slag
  • Method for recovering soluble manganese and ammonium from electrolytic manganese slag
  • Method for recovering soluble manganese and ammonium from electrolytic manganese slag

Examples

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Effect test

Embodiment 1

[0030] The method for economically and efficiently recovering soluble ammonium manganese in electrolytic manganese slag of the present invention is applied to the manganese smelting slag of Zhenxing Chemical Plant in Huayuan County, Hunan Province. The composition analysis of the manganese smelting slag is shown in Table 1. Manganese smelting slag was treated with a three-stage countercurrent washing process with a solid-to-liquid mass ratio of 1:1.5 and a single-tank washing time of 30 minutes. The results of manganese and ammonium / nitrogen contents in washing water and slag are listed in Table 2. Washing slag is used as a common inorganic material for building materials. The washing water is firstly extracted and concentrated with manganese ions, and then the raffinate is purified with alkalization stripping method to recover ammonia resources. Among them, three-stage normal extraction and two-stage back-extraction processes are used in the extraction process. The oil-water r...

Embodiment 2

[0032] The method for economically and efficiently recovering soluble ammonium manganese in electrolytic manganese slag of the present invention is applied to the manganese smelting slag of Zhongfa Manganese Industry in Huayuan County, Hunan Province. The composition analysis of the manganese smelting slag is shown in Table 1. Manganese smelting slag was treated with a three-stage countercurrent washing process with a solid-to-liquid mass ratio of 1:1.5 and a single-tank washing time of 30 minutes. The results of manganese and ammonium / nitrogen contents in washing water and slag are listed in Table 2. Washing slag is used as a common inorganic material for building materials. The washing water is firstly extracted and concentrated with manganese ions, and then the raffinate is purified with alkalization stripping method to recover ammonia resources. Among them, three-stage normal extraction and two-stage back-extraction processes are used in the extraction process. The oil-wate...

Embodiment 3

[0034] The method for economically and efficiently recovering soluble manganese ammonium in electrolytic manganese slag of the present invention is applied to the manganese smelting slag of Jili Baikuang Manganese Industry in Jingxi County, Guangxi Province. The composition analysis of the manganese smelting slag is shown in Table 1. Manganese smelting slag was treated with a three-stage countercurrent washing process with a solid-to-liquid mass ratio of 1:1.5 and a single-tank washing time of 50 minutes. Washing slag is used as a common inorganic material for building materials. The washing water is firstly extracted and concentrated with manganese ions, and then the raffinate is purified with alkalization stripping method to recover ammonia resources. In the middle extraction process, three-stage normal extraction and two-stage back-extraction processes are adopted. The oil-water ratio of normal extraction is 1:3, and the oil-water ratio of back extraction is 5:1. The extract...

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Abstract

The invention discloses a method for recovering soluble manganese and ammonium from electrolytic manganese slag. The method comprises the following steps: washing the electrolytic manganese slag withwater to obtain water washing liquid and water washing slag; extracting manganese ions from the water washing liquid by adopting an organic phase containing an extracting agent to obtain raffinate anda loaded organic phase, and performing reverse extraction on the loaded organic phase by adopting an acidic solution to obtain an organic phase containing the extracting agent and reverse extractionliquid; stripping ammonia gas from the raffinate through alkalinity, absorbing part of the ammonia gas by adopting an organic phase containing an extracting agent for saponification of the extractingagent, and absorbing a part of the ammonia gas by adopting strip liquor to obtain a solution containing ammonium ions and manganese ions for electrolyzing manganese, wherein the water washing residueis used as a cement retarder or roadbed backfill. According to the method, extraction and enrichment of soluble manganese and ammonium in the electrolytic manganese residues can be achieved to obtainthe manganese electrolyte, and the washed residues can be used for building materials or road pavement to be digested, so that a present problem that the electrolytic manganese residues are piled up for a long time is thoroughly avoided.

Description

technical field [0001] The invention relates to a method for resource utilization of electrolytic manganese slag, in particular to a method for economically and efficiently recovering soluble manganese sulfate and ammonium sulfate from electrolytic manganese slag, belonging to the fields of environmental engineering and solid waste resource utilization. Background technique [0002] my country has 213 manganese ore regions, of which the least manganese ore reserves are 566 million tons. Guangxi has the most abundant manganese resources (accounting for about 38% of the country), with reserves of 281 million tons, followed by Hunan (about 18% of the country) with reserves of 158 million tons, Yunnan (92 million tons), Guizhou (80 million tons) ) etc. my country's manganese ore resources are mainly distributed in eight regions. The manganese ore reserves in these eight regions account for 82% of the total manganese ore in the country, so they have become my country's important...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G45/10C01C1/24C22B47/00C22B7/04C04B22/14C04B7/24C04B103/22
CPCC01G45/10C01G45/003C01C1/24C22B47/00C22B7/04C22B7/006C04B40/0039C04B7/24C04B2103/22C04B22/143C04B22/06C04B22/00Y02P10/20Y02P40/10
Inventor 岳彤孙伟胡文吉豪何冬冬牛臻胡岳华
Owner CENT SOUTH UNIV
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