Cleaning potentiality analysis of harmful microelements in coal
ZHANG Bo
Abstract：In order to reduce harmful microelements in coal and improve commercial coal quality,the raw coal from Dahebian coal mine was chosen as research object.Through multi-step releasing flotation test,the harmful microelements yield and migration characteristics were investigated.In order to determine the harmful microelements content,eight coal samples from four coal preparation plants were meas-ured with inductively coupled plasma massspectrometry.The removal efficiency,migration law and cleaning potentiality of harmful microel-ements were analyzed.The results showed that,most of minerals in coal were existed in ash,so the minerals could be removed with the re-moval of ash.The coefficient of association between harmful microelements and minerals was greater than 0.708 which indicated that the two had a correlation.The harmful microelements in coal occurred in the form of inorganic minerals,so the harmful microelements migrated in accordance with the migration patterns of inorganic minerals.Only a few harmful microelements occurred in the form of organic minerals and the conventional physical separation played a limited role in treating these microelements.Diversity of some harmful microelements de-termined their removal efficiency fluctuated over a large range.
Keywords：harmful microelementoccurrence statusmigration characteristicsclean potentiality
Publication Date：2015-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 20-24 )