Abstract
Zhundong coal has the advantages of low ignition temperature and high burning rate etc,but the high content of alkali metal in coal leads to slagging and fouling problems in the combustion process. In order to improve the coal’s slagging and fouling problems and the combustion efficiency of oil shale semi coke, XRF was used to determine the ash content of the sample to show high sodium content in coal has reached 6.41% and high silicon, aluminum content in the oil shale semi coke and alkali metal content decreased obviously after mixing. By calculating the index of slagging and contamination showed that blending oil shale semi-coke makes slagging, contamination index of Zhundong coal decrease for higher, moderate and slight degree by severity, and semi-coke mixing proportion reached more than 30%, oil shale semi-coke greatly improve the coal contamination problem.
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