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Treatment method for electrolytic manganese residues

A technology of electrolytic manganese slag and treatment method, which is applied in the direction of sustainable waste treatment, solid waste management, climate sustainability, etc., can solve problems such as electrolytic manganese slag pollution, achieve increased strength, prevent heavy metals from Effects of Heavy Metal Ion Adsorption and Chelation

Inactive Publication Date: 2019-01-04
CHANGSHA HUIJU ENVIRONMENTAL TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The technical problem to be solved by the present invention is: aiming at the pollution of electrolytic manganese slag, to stabilize and solidify the heavy metal pollutants into a solidified body, so as to realize reuse

Method used

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  • Treatment method for electrolytic manganese residues

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Embodiment 1

[0026] Take electrolytic manganese slag, crush it into powder with a particle size range of 2-5 mm, add 0.1mol / L sodium citrate for soaking treatment for 24 hours; filter and dry to obtain acid-activated dry electrolytic manganese slag powder; The raw materials are mixed according to the mass ratio of 1:1, and the adsorption materials with a particle size of no more than 1mm are obtained after screening, and the adsorption materials are added to the electrolytic manganese slag powder according to 20% of the mass of the dry electrolytic manganese slag powder, and stirred to obtain a mixed powder Carry out vacuum co-pyrolysis of the obtained mixed powder and straw according to the mass ratio of 2:1, the temperature of vacuum pyrolysis is 500°C, and the pressure of the vacuum system is 1Kpa to obtain pyrolysis products, and then add thermal The chitosan powder that decomposes product quality is 5%, mixes and stirs to obtain mixture; Add in the mixture: account for the Portland cem...

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Abstract

The invention provides a treatment method for electrolytic manganese residues. The treatment method comprises the following steps: crushing the electrolytic manganese residues into powder and adding sodium citrate to soak the electrolytic manganese residues and filtering the mixture; mixing zeolite powder with sodium bentonite, adding the screened powder into the electrolytic manganese residue powder and stirring the mixture to obtain mixed powder; carrying out vacuum co-pyrolysis on the mixed powder and biomass, adding chitosan powder which accounts for 2-5% by mass of a pyrolysis product, and mixing and stirring the mixture to obtain a mixture; adding cement powder activated aluminium oxide into the mixture, adding a proper amount of water, stirring and mixing the mixture in a stirrer toform slurry; and adding the slurry into a building block forming mold, adopting a forming process to vibrate and press the mold at constant temperature and constant pressure, leaving the mold to stand for 12-30 hours, and moisturizing and naturally curing the same for 20-30 days to obtain a cured body. The treatment method is simple in process, little in needed engineering equipment and suitablefor scaled production. Meanwhile, the prepared cured body can be used as a regenerated brick.

Description

Technical field: [0001] The invention relates to a treatment method for electrolytic manganese slag, which belongs to the technical field of solid waste treatment and recycling in the field of environmental protection. technical background: [0002] my country is the world's largest producer, consumer and exporter of electrolytic manganese metal, with a production capacity of more than 2 million tons, accounting for 98% of the world's total production capacity of electrolytic manganese. Electrolytic manganese slag is the filtered acid slag produced after electrolysis of metal manganese, and is a key pollutant in the electrolytic manganese industry. The production of electrolytic manganese slag reaches 7-11 tons per ton of manganese, and the annual production is about 20 million tons. At present, enterprises have not yet found a way to properly dispose of electrolytic manganese slag, and generally transport electrolytic manganese slag to the storage yard for damming. Domest...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B18/14
CPCC04B18/144C04B28/04C04B14/047C04B14/104C04B14/022C04B24/38C04B14/303Y02W30/91
Inventor 易自希
Owner CHANGSHA HUIJU ENVIRONMENTAL TECH CO LTD
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