Evaluation of oil sludge as an alternative fuel in the production of Portland cement clinker

The use of oil sludge as an alternative fuel during clinker production was evaluated. It was found that 14% oil sludge could be added to raw mixture and that variations in the mode of oil sludge addition had no obvious effect on the combustibility of the mixture or the cement quality, such that all cement samples satisfied the P.O 42.5 standard. It was also determined that 90.98% of coal could be replaced by oil sludge. The concentration of VOCs decreased as the calcination temperature was raised. So the adding points with high temperature (>1450 °C) are recommended for oil sludge utilization.