Study on the Properties and Solidification of Heavy Metal Pollutants in Stockpiling Manganese Slag
In order to solve the problem of harmless treatment of manganese slag,a component,morphological,and solidification analysis was conducted on the stockpiling manganese slag.The results show that the stockpiling manganese slag contains a large amount of heavy metal pollutants,and most of the pollutants have a high proportion of soluble forms.The total Mn content exceeds the relevant standard limits,and the concentrations of Mn2+and Ni2+in the leachate exceed the emission limits;Using limestone as a solidifying agent to solidify stockpiling manganese slag,the content of Mn2+and Ni2+in the leachate significantly decreased.When a mass fraction of 2%was added,the concentration of Ni2+in the leachate met the emission standard requirements.After increasing to 6%,the concentration of Mn2+met the standard;After solidification,the proportion of soluble forms of pollutants in the stockpiling manganese slag significantly decreases,the proportion of insoluble forms increases,and the activity of pollutants significantly decreases,indicating that limestone has a good effect on the harmless treatment of stockpiling manganese slag.
Electrolytic manganese slagHeavy metal pollutantsToxicity leachingForm DistributionSolidification
NETL
NSTL
万方数据
