Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Harmless treatment method of electrolytic manganese residue

A technology of harmless treatment and electrolysis of manganese slag, which is applied in chemical instruments and methods, inorganic chemistry, manganese compounds, etc., can solve the problems of surrounding residents' health threats, surrounding environmental pollution, and a large amount of waste gas, and achieve diversified recycling , The time required for the process is short, and the effect of reducing the pressure on environmental protection

Active Publication Date: 2018-11-02
CENT SOUTH UNIV
View PDF10 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, electrolytic metal manganese anode slag is mainly used to produce ferromanganese alloy, but a large amount of waste gas and Pb-containing smoke and dust are generated during the treatment process, which causes serious pollution to the surrounding environment and poses a serious threat to the health of surrounding residents.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Harmless treatment method of electrolytic manganese residue

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] A harmless treatment method of electrolytic manganese slag of the present invention, the process flow chart is as follows figure 1 shown, including the following steps:

[0049] (1) Dry the electrolytic manganese slag taken from the slag factory, crush the dried electrolytic manganese slag with a powder machine or a crusher to less than 100 mesh, and use a rotary kiln to cool the electrolytic manganese slag at a low temperature of 550°C Roasting for 90min to obtain the calcined material and produce NH-containing 3 and SO 2 smoke.

[0050] (2) Slurry the calcined material obtained in step (1) with water according to the liquid-solid ratio of 3: 1mL / g, then place the obtained slurry in a water bath at 40°C, stir and immerse in water, react for 30 minutes, and then press filter A press filter residue and a manganese-containing filtrate are obtained.

[0051] (3) Dry the press filter residue obtained in step (2) to obtain harmless manganese slag, add the oxalic acid sol...

Embodiment 2

[0057] A harmless treatment method of electrolytic manganese slag of the present invention, the process flow chart is as follows figure 1 shown, including the following steps:

[0058] (1) Dry the electrolytic manganese slag taken from the slag factory, crush the dried electrolytic manganese slag with a powder machine to below 100 mesh, and roast the crushed electrolytic manganese slag at 600°C for 60 minutes in a rotary kiln to obtain Roasted material, and produces NH-containing 3 and SO 2 smoke.

[0059] (2) Slurry the calcined material and water obtained in step (1) according to the liquid-solid ratio of 8: 3mL / g, then place the obtained slurry in a water bath at 50°C with stirring and water immersion, react for 30 minutes, and then press filter to obtain Press filter residue and filtrate containing manganese.

[0060] (3) Dry the press filter residue obtained in step (2) to obtain harmless manganese slag, add the oxalic acid solution to the manganese-containing filtrat...

Embodiment 3

[0066] A harmless treatment method of electrolytic manganese slag of the present invention, the process flow chart is as follows figure 1 shown, including the following steps:

[0067] (1) Dry the electrolytic manganese slag taken from the slag factory, crush the dried electrolytic manganese slag with a powder machine to below 100 mesh, and roast the crushed electrolytic manganese slag at 600°C for 60 minutes in a rotary kiln to obtain Roasted material, and produces NH-containing 3 and SO 2 smoke.

[0068] (2) Slurry the calcined material and water obtained in step (1) according to the liquid-solid ratio of 8: 3mL / g, then place the obtained slurry in a water bath at 50°C with stirring and water immersion, react for 30 minutes, and then press filter to obtain Press filter residue and filtrate containing manganese.

[0069] (3) Dry the press filter residue obtained in step (2) to obtain harmless manganese slag, add the oxalic acid solution to the manganese-containing filtrat...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle size (mesh)aaaaaaaaaa
water contentaaaaaaaaaa
Login to View More

Abstract

The invention discloses a harmless treatment method of an electrolytic manganese residue. The harmless treatment method comprises the following steps that (1) the electrolytic manganese slag is driedand crushed and then subjected to low-temperature roasting to obtain a calcined material, and flue gas containing NH3 and SO2 is generated; (2) the obtained calcined material is subjected to water immersion and then subjected to solid-liquid separation to obtain a filter residue and manganese-containing filtrate; (3) the filter residue obtained from the separation is dried to obtain a harmless manganese residue, a precipitant is added to the manganese-containing filtrate to precipitate manganese, and after the completion of manganese precipitation, the solid-liquid separation is performed to obtain manganese-precipitated post-liquid and a manganese-containing product. The harmless treatment method of the electrolytic manganese residue is simple in process, mild in process conditions, shortin time required for the flow path and low in cost, and can effectively realize the harmless resource treatment of the electrolytic manganese residue, environmental protection is achieved, and the environmental protection pressure and production cost of related enterprises are reduced.

Description

technical field [0001] The invention relates to the field of recovery and treatment of metallurgical solid waste and low-grade refractory mineral resources, and relates to a harmless treatment method for electrolytic manganese slag. Background technique [0002] Electrolytic manganese slag is a kind of acid leaching filter residue produced after adding sulfuric acid solution to leach rhodochrosite ore powder or pyrolusite ore powder to prepare electrolytic manganese solution. The appearance of the electrolytic manganese slag is a black powder aggregate with a certain viscosity, the water content is generally 25% to 35%, and the pH is 5.0 to 6.5. [0003] China is the world's largest producer, consumer and exporter of electrolytic manganese. Its manufacturers are mainly concentrated in the "manganese triangle" (the junction of Hunan, Guizhou and Chongqing), Guangxi and Ningxia. In 2017, China's annual output of electrolytic manganese exceeded 1.5 million tons. Electrolytic...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/02C22B7/00C22B47/00C22B13/00C22B11/00C22B26/22C07C51/41C07C55/07C01G45/00
CPCC01G45/00C07C51/412C22B1/02C22B7/006C22B11/044C22B13/045C22B26/22C22B47/00C07C55/07Y02P10/20
Inventor 何仕超刘志宏刘智勇夏隆巩李启厚姚伟马欢张涛
Owner CENT SOUTH UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com